CN213563313U - Quick-release pretensioning prestressed plate type stair mold - Google Patents
Quick-release pretensioning prestressed plate type stair mold Download PDFInfo
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- CN213563313U CN213563313U CN202021866840.3U CN202021866840U CN213563313U CN 213563313 U CN213563313 U CN 213563313U CN 202021866840 U CN202021866840 U CN 202021866840U CN 213563313 U CN213563313 U CN 213563313U
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Abstract
The utility model relates to the technical field of assembly type buildings, in particular to a quick-release pretensioning prestressed plate type stair mold, which has low efficiency because the mold is occupied by the same prefabricated stair for a long time in the prior processing mode, and comprises a bottom plate side mold, a tread side mold, a tendon-passing hole side mold, an end plate side mold and a base, wherein the tendon-passing hole side mold is provided with a tendon-passing hole, the bottom plate side mold and the tread side mold are both provided with a positioning hole and a mold hanging point, the bottom plate side mold is provided with a first tendon positioning device and a mold hanging point assembling part, the tread side mold is provided with a pin key pretensioning hole assembling part, a second tendon positioning device and a mounting hanging point, and is matched with a prestressing long line platform base for use, the mold does not bear the tension force, thereby being convenient for controlling the quality of prestressed tendons, and realizing quick demolding by adopting the design of stretching, the turnover rate of the die is improved, and the method has a good development prospect in the technical field of assembly type buildings.
Description
Technical Field
The utility model relates to an assembly type structure technical field especially relates to quick detach formula pretensioning prestressing force board-like stair mould.
Background
Along with the rapid development of assembly type buildings in recent years, the prefabricated staircase component obtains the general acceptance of the market with the advantages of standardized and integrated design, reliable structural performance, good appearance quality, rapid and convenient installation efficiency, higher cost performance and the like, and is widely applied to the field of constructional engineering.
The common practice of the prior art for the precast concrete stairway is non-prestressed, and the stair mold corresponding to the non-prestressed stair member is also manufactured aiming at the non-prestressed stair member, so that the production process requirements of the prestressed stair member cannot be met.
Chinese patent CN209851207U discloses a method for making a prestressed stair mold, especially a method for making a pretensioned prestressed stair mold, which is to arrange prestressed tendon tensioning tables and prestressed tendon through holes at the upper and lower ends of a stair mold to realize the production of prestressed stair members, however, in this patent, the tensioning tables are arranged at the two ends of the mold, because the prestressed tendon has a large tensioning force, the requirement on the rigidity of the mold is very high, the weight of the mold is inevitably increased, even the mold is deformed due to the large stress in the process of the mold, and because the prestressed tendon is tensioned after the strength of the concrete exceeds 75% of the design strength, the processing method cannot realize the rapid demolding turnover of the mold, the mold is occupied for a long time, and the production efficiency is low; in addition, the die adopts a production method of single member tensioning, and tensioning is carried out once when each member is manufactured, so that the risk coefficient of quality and safety problems in the tensioning and releasing processes is increased.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned condition, for overcoming prior art's defect, the utility model provides a quick detach formula pretension method prestressing force board-like stair mould solves that the turnover time that current mould exists is long, a component of every preparation all will carry out a stretch-draw alone and then cause the problem that the risk factor is big.
The technical scheme is that the quick-dismantling pretensioning prestressed plate type stair mold comprises a mold body adopting a vertical production mode, wherein the mold body comprises a side mold and a base which are designed in a separated mode, a precondition is created for demolding the side mold before the prestressed ribs are placed and tensioned, the side mold is designed in a separated mode and comprises a bottom plate side mold, a tread side mold, a tendon-penetrating hole side mold and an end plate side mold, an open cylindrical prestressed rib penetrating hole is formed in the tendon-penetrating hole side mold, the purposes of demolding and accelerating the turnover rate of the mold for the tendon-penetrating hole side mold before the prestressed ribs are placed and tensioned are achieved, one surfaces, close to the base, of the bottom plate side mold and the tread side mold are provided with positioning holes, the side surfaces far away from the base are provided with mold hanging points, the positioning holes are convenient for rapidly and accurately achieving side mold assembly, a first prestressed rib positioning device is arranged on the bottom plate side mold, the side mold is provided with a demolding hanging point assembling piece, set up cotter pin hole frock piece, second prestressing tendons positioner, installation hoisting point on the tread side form, make up through setting up screw rod fastener, locating plate and fastening bolt between bottom plate side form and the tread side form, ensure that cross-section width is unanimous about each position of mould, prestressing force stair mould and the cooperation of prestressing force long line platform pedestal use, any tension force need not be undertaken to mould itself to reach and reduce mould weight, avoid the purpose that the mould atress warp, each spare part of constituteing the mould body adopts Q235 steel processing preparation to form.
Furthermore, the side mold and the base of the prestressed stair mold can be matched according to the proportion of 1:2 or 1:3, and the specific proportioning mode needs to be prepared according to the number of tensioning production lines, so that the efficient and mass production of the components is realized on the premise of effectively reducing the cost of the mold.
Furthermore, the pin key preformed hole tooling parts are respectively arranged at two ends of the side die of the tread surface, each pin key preformed hole tooling part is a cone component with a large upper part and a small lower part, and the second prestressed tendon positioning device is arranged at one end, far away from the first prestressed tendon positioning device, of the side die of the tread surface.
Furthermore, the hole tooling part is reserved on the pin key in a cone shape, the hole diameter of the upper part of the hole tooling part is increased by 10mm compared with the hole diameter of the lower part of the hole tooling part, so that the tooling part can be conveniently and smoothly demoulded, and the hole forming quality is ensured.
Furthermore, the mounting hanging points are respectively arranged on the tread surface of the side mold of the tread surface close to the two end parts in two groups.
Furthermore, each tread of the tread side mould is provided with an anti-slip strip.
Furthermore, the end plate side die comprises a first end plate side die and a second end plate side die, and rib holes are formed in the second end plate side die.
Furthermore, the tendon passing hole of the prestressed tendon is open-type cylindrical, so that the purposes of carrying out demoulding operation on a tendon passing hole side die and accelerating the turnover rate of the die before the prestressed tendon is placed on the prestressed tendon, the tendon passing hole of the prestressed tendon corresponds to the position of the second prestressed tendon positioning device, the position of the prestressed tendon is accurately controlled, the thickness of the protective layer is controlled, and a groove is formed at the end part of the prestressed tendon, so that the effect of concealing the prestressed tendon is achieved.
Furthermore, sealing strips are pasted at the splicing parts between the base and the side molds and between the side molds so as to ensure tight splicing seams among all the molds, avoid concrete leakage and improve the impression quality of the components.
Furthermore, both sides limit all is equipped with logical long chamfer strip about the side form, avoids the easy damaged problem that appears in right angle shape component edge, has improved the impression quality of piece between the piece formula stair, also is convenient for glue sealing treatment to the piece position simultaneously.
Furthermore, the mould body is made into an integral type and an assembling type according to different splitting forms of the stair component; the assembled stair is a scissor stair component which divides a stair component into two parts along the longitudinal center line, is suitable for a scissor stair component with long component length and heavy weight, and is used for reducing the model selection of hoisting machinery on a construction site, and the integral stair is directly manufactured into an integral stair component.
The specific assembling and using method of the quick-release pretensioning prestressed plate type stair mold comprises the following steps:
s1: the die is matched with the prestress long-line platform for use, and the die base is arranged along the direction of the long-line platform to ensure that the base is solid and flat;
s2: cleaning the surfaces of all the dies to ensure the surfaces to be clean and have no stains, uniformly brushing a release agent, and sticking sponge sealing strips on the splicing parts of all the dies.
S3: fastening and connecting the side mold of the tread with the base through a positioning hole by using a coarse thread bolt, placing the bound reinforcement cage on a mold, adjusting the position of a reinforcement according to design requirements, erecting a cushion block, and installing a pin key preformed hole tooling piece and a mounting lifting point;
s4: installing a first end plate side mold and a second end plate side mold, fastening and connecting by using a coarse tooth bolt, penetrating a prestressed tendon through a tendon penetrating hole, and primarily tensioning the prestressed tendon by using a long line table tensioning pedestal, wherein the tensioning stress is not more than 20% of the designed control stress value, and the tensioning value of the prestressed tendon is ensured;
s5: checking whether the thickness control of the prestressed tendon protection layer is accurate, if deviation exists, slightly adjusting the position of the base to control so that the prestressed tendons at the left end and the right end in the die just contact the first prestressed tendon positioning device and the second prestressed tendon positioning device;
s6: hoisting the bottom plate side mold and the rib hole side mold to the base through the mold hoisting point, fastening and connecting the bottom plate side mold and the rib hole side mold with the base, the first end plate side mold and the second end plate side mold through the positioning hole by using a coarse thread bolt, installing the demolding hoisting point through the demolding hoisting point tool, and finishing the fastening and width control work between the bottom plate side mold and the tread side mold through the screw rod fastening device, the positioning plate and the fastening bolt;
s7: performing formal tensioning on the prestressed tendons, tensioning the prestressed tendons to a designed control stress value, plugging prestressed tendon through holes at the left end and the right end of the mould by using a sealing material, and then performing pouring, vibrating, surface folding and maintenance on concrete;
s8: when the compressive strength of the concrete is not lower than 30% of the designed strength, the mould removal work of all moulds except the base can be carried out; the specific die removing sequence is that all the fastening devices and hoisting point tooling parts are removed firstly, and then the second end plate side die, the rib penetrating hole side die, the bottom plate side die, the first end plate side die and the tread side die 2 are removed in sequence;
s9: spraying water on the surface of the component, covering and maintaining, polishing and cleaning the surface of the disassembled mould, and putting the surface of the disassembled mould into the production of the next batch of components for use;
s10: after the compressive strength of the concrete of the member reaches 75% of the design value, the releasing and tensioning work of the prestressed tendons can be carried out, and after the releasing and tensioning work, the finished member is lifted away from the base, and the production work of the next round of member is started.
The technical effect of the utility model is that, through using with the cooperation of prestressing force long-line platform pedestal, any tension force need not be undertaken to mould itself, greatly reduced mould weight, the control of the prestressing tendons stretch-draw quality of also being convenient for simultaneously, through the design that adopts the disconnect-type, realized the drawing of patterns of mould side form one day, improved mould turnover rate, created the condition for the high-efficient production of prestressing force stair component, the utility model discloses the production of specially adapted earlier long-line platform tension prestressing force board-like prefabricated stair component is in the leading level in the prestressing force board-like stair mould in China.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the tread side mold, the end plate side mold and the base of the present invention.
Fig. 3 is a schematic structural view of the bottom plate side mold, the rib-penetrating hole side mold, the end plate side mold and the base of the present invention.
Fig. 4 is a schematic diagram of the assembly effect of the product after the mold is applied.
In the figure: 1. the device comprises a bottom plate side die, a step face side die, a rib penetrating hole side die, a first end plate side die, a second end plate side die, a step face side die.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in figures 1 to 4, the quick-release pretensioning prestressed plate type stair mold comprises a mold body adopting a vertical production mode, wherein the mold body comprises a side mold and a base 6 which are designed in a separated mode, a precondition is created for demolding operation of the side mold before the prestressed ribs are placed, the side mold is designed in a separated mode and comprises a bottom plate side mold 1, a tread side mold 2, a rib hole side mold 3 and an end plate side mold, the rib hole side mold 3 is provided with an open cylindrical prestressed rib hole 301, the purposes of demolding operation and mold turnover rate acceleration of the rib hole side mold before the prestressed ribs are placed are achieved, one side of the bottom plate side mold 1 and one side of the tread side mold 2, which are close to the base 6, are respectively provided with a positioning hole 7, the side far away from the base 6 are respectively provided with a mold hanging point 8, the positioning hole 7 is convenient for rapidly and accurately achieving side mold assembly, set up first prestressing tendons positioner 101 on the bottom plate side form 1 and keep away from the side of base 6 and set up drawing of patterns hoisting point frock piece 102, set up pin key preformed hole frock piece 207, second prestressing tendons positioner 201, installation hoisting point 202 on tread side form 2, make up through setting up screw rod fastener 204, locating plate 205 and fastening bolt 206 between bottom plate side form 1 and the tread side form 2, ensure that the cross-section width is unanimous about each position of mould, prestressing force stair mould and the cooperation of prestressing force rectangular platform pedestal are used, and any tension force need not be undertaken to mould itself to reach the mesh that reduces mould weight, avoids the mould atress to warp, and each spare part of constituteing the mould body adopts Q235 steel processing preparation to form.
Example two: on the basis of the first embodiment, the side mold and the base of the prestressed stair mold can be matched according to a ratio of 1:2 or 1:3, a specific matching mode needs to be prepared according to the number of tensioning production lines so as to realize the efficient and batch production of the components on the premise of effectively reducing the mold cost, pin key preformed hole tooling parts 207 are respectively arranged at two ends of the side mold 2 of the tread surface, each pin key preformed hole tooling part 207 is a cone part with a large upper part and a small lower part, the hole diameter of the upper part of each pin key preformed hole tooling part is 10mm larger than that of the lower part of each pin key preformed hole tooling part in a cone shape, so that the tooling parts can be smoothly demolded and the quality of formed holes is ensured, the second prestressed rib positioning device 201 is arranged at one end of the side mold 2 of the tread surface, which is far away from the first prestressed rib positioning device 101, each tread surface of the side mold 2 of the tread surface is provided with an anti-skid strip 203, the side mold of the end plate comprises a first end plate 4 and a second end plate 5, set up out the muscle hole on second end board side form 5, tendon hole 301 is cylindric for the open type, realizes carrying out the drawing of patterns operation, accelerating the purpose of mould turnover rate to tendon hole side form before the prestressing tendons is put to open, tendon hole 301 corresponds with second prestressing tendons positioner 201 position for the position and the protective layer thickness of accurate control prestressing tendons, and form the recess at prestressing tendons end position, so that play the effect of hidden prestressing tendons.
Example three: on the basis of the above embodiment, the mounting lifting points 202 are respectively arranged on the tread surface of the tread surface side mold 2 near the two end portions in two groups, and the number of the spaced tread surfaces between the two groups of mounting lifting points 202 and the corresponding end head plate side molds is equal to form symmetry, so as to ensure the stability of the stair supported by the mold during lifting.
Fourth embodiment, on the basis of above-mentioned embodiment, the sealing strip is pasted at concatenation position between base and side form, side form and side form to ensure that the piece is tight between all moulds, avoid the concrete to leak thick liquid, improve the component impression quality, both sides limit all is equipped with logical long chamfer strip about the side form, avoids the problem that the right angle shape component edge is damaged easily to appear, has improved the impression quality of piece between the piece together formula stair, also is convenient for glue sealing process to the piece position simultaneously.
On the basis of the above embodiment, as shown in fig. 4, the mold body is made into an integral type and an assembly type according to different splitting forms of the stair component; the assembled stair is a scissor stair component which divides a stair component into two parts along the longitudinal center line, is suitable for a scissor stair component with long component length and heavy weight, and is used for reducing the model selection of hoisting machinery on a construction site, and the integral stair is directly manufactured into an integral stair component.
Example five: the specific assembling and using method of the quick-release pretensioning prestressed plate type stair mold comprises the following steps:
s1: the mould is matched with a prestressed long-line platform for use, and a mould base 6 is arranged along the direction of the long-line platform to ensure that the base is solid and flat;
s2: cleaning the surfaces of all the dies to ensure the surfaces to be clean and have no stains, uniformly brushing a release agent, and sticking sponge sealing strips on the splicing parts of all the dies.
S3: the side formwork 2 of the tread is fixedly connected with a base 6 through a positioning hole 7 by using a coarse thread bolt, a bound reinforcement cage is placed on a mould, the position of a reinforcement is adjusted according to the design requirement, a cushion block is erected, and a pin key preformed hole tooling part 207 and a mounting lifting point 202 are mounted;
s4: installing a first end plate side mold 4 and a second end plate side mold 5, fastening and connecting by using a coarse tooth bolt, penetrating a prestressed tendon through a tendon penetrating hole 301, and primarily tensioning the prestressed tendon by using a long line table tensioning pedestal, wherein the tensioning stress is not more than 20% of a designed control stress value, and the tensioning value of the prestressed tendon is ensured;
s5: checking whether the thickness control of the prestressed tendon protection layer is accurate, if deviation exists, slightly adjusting the position of the base to control so that the prestressed tendons at the left end and the right end in the die just contact the first prestressed tendon positioning device and the second prestressed tendon positioning device;
s6: hoisting the bottom plate side die and the rib hole side die 2 to the base 6 through the die hoisting points 8, fastening and connecting the bottom plate side die and the rib hole side die with the base 6, the first end plate side die and the second end plate side die through the positioning holes 7 by using coarse thread bolts, installing the demolding hoisting points through the demolding hoisting point tooling part 102, and finishing the fastening and width control work between the bottom plate side die 1 and the tread side die 2 through the screw fastening device 204, the positioning plate 205 and the fastening bolts 206;
s7: formally tensioning the prestressed tendons, tensioning the prestressed tendons to a designed control stress value, plugging prestressed tendon through holes 301 at the left end and the right end of the die by using a sealing material, and pouring, vibrating, collecting and maintaining concrete;
s8: when the compressive strength of the concrete is not lower than 30% of the designed strength, the mould removal work of all moulds except the base 6 can be carried out; the specific die removing sequence is that all fastening devices and hoisting point tooling parts are removed firstly, and then the second end plate side die, the rib hole side die 2, the bottom plate side die 1, the first end plate side die and the tread side die 2 are removed in sequence;
s9: spraying water on the surface of the component, covering and maintaining, polishing and cleaning the surface of the disassembled mould, and putting the surface of the disassembled mould into the production of the next batch of components for use;
s10: after the compressive strength of the concrete of the member reaches 75% of the design value, the releasing and tensioning work of the prestressed tendons can be carried out, and after the releasing and tensioning work, the finished member is lifted away from the base 6, and the production work of the next round of member is started.
The technical effect of the utility model is that, through using with the cooperation of prestressing force long-line platform pedestal, any tension force need not be undertaken to mould itself, greatly reduced mould weight, the control of the prestressing tendons stretch-draw quality of also being convenient for simultaneously, through the design that adopts the disconnect-type, realized the drawing of patterns of mould side form one day, improved mould turnover rate, created the condition for the high-efficient production of prestressing force stair component, the utility model discloses the production of specially adapted earlier long-line platform tension prestressing force board-like prefabricated stair component is in the leading level in the prestressing force board-like stair mould in China.
The present invention has been described in detail with reference to the specific embodiments and examples, but these should not be construed as limitations of the present invention. Numerous variations and modifications can be made by those skilled in the art without departing from the principles of the invention, which should also be considered as within the scope of the invention.
Claims (10)
1. Quick detach formula pretension method prestressing force plate stair mould, including the mould body, its characterized in that, the mould body includes side form and base (6), the side form is the disconnect-type design including bottom plate side form (1), tread side form (2), wear muscle hole side form (3) and end board side form, be equipped with prestressing tendons hole (301) on wearing muscle hole side form (3), bottom plate side form (1) and tread side form (2) are close to the side of base (6) and all set up mould hoisting point (8) in the side that base (6) were kept away from all set up locating hole (7), set up first prestressing tendons positioner (101) on bottom plate side form (1) and the side of keeping away from base (6) sets up drawing of patterns hoisting point frock piece (102), set up round pin key reservation hole frock piece (207), second prestressing tendons positioner (201) on tread side form (2), And a hanging point (202) is installed, and the bottom plate side die (1) and the tread side die (2) are combined by arranging a screw rod fastening device (204), a positioning plate (205) and a fastening bolt (206).
2. The quick-release pretensioning prestressed plate stair mold according to claim 1, wherein the pin key preformed hole tooling pieces (207) are respectively arranged at two ends of the tread side mold (2), each pin key preformed hole tooling piece (207) is a conical part with a large top and a small bottom, and the second tendon positioning device (201) is arranged at one end of the tread side mold (2) far away from the first tendon positioning device (101).
3. The quick release pretensioning prestressed plate stair mold according to claim 1, wherein the mounting hanging points (202) are respectively disposed on the tread near the two ends of the tread side mold (2) in two groups.
4. The quick-release pretensioning prestressed plate stair mold according to claim 1, wherein anti-slip strips (203) are provided on each tread surface of the tread surface side mold (2).
5. The quick-release pretensioning prestressed plate stair mold according to claim 1, wherein the end plate side mold comprises a first end plate side mold (4) and a second end plate side mold (5), and the second end plate side mold (5) is provided with a rib hole.
6. The quick release pretensioning prestressed plate stair mold according to claim 1, wherein the tendon penetration hole (301) is an open cylinder, and the tendon penetration hole (301) corresponds to the second tendon positioning device (201).
7. The quick release pretensioning prestressed plate stair mold according to claim 1, wherein sealing strips are adhered to the base and the side mold, and the splicing parts between the side mold and the side mold.
8. The quick release pretensioned prestressed slab stair mold of claim 1, wherein the upper and lower sides of the side mold are provided with a full length chamfer strip.
9. The quick release pretensioned prestressed slab stair mold of claim 1 wherein the mold body is a split structure.
10. The quick release pretensioned prestressed slab stair mold of claim 1 wherein the mold body is a monolithic structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021866840.3U CN213563313U (en) | 2020-08-31 | 2020-08-31 | Quick-release pretensioning prestressed plate type stair mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021866840.3U CN213563313U (en) | 2020-08-31 | 2020-08-31 | Quick-release pretensioning prestressed plate type stair mold |
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| CN213563313U true CN213563313U (en) | 2021-06-29 |
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| CN202021866840.3U Active CN213563313U (en) | 2020-08-31 | 2020-08-31 | Quick-release pretensioning prestressed plate type stair mold |
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