CN216067968U - Automatic end die dismounting device capable of avoiding end part of box girder from collapsing - Google Patents
Automatic end die dismounting device capable of avoiding end part of box girder from collapsing Download PDFInfo
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- CN216067968U CN216067968U CN202122122574.4U CN202122122574U CN216067968U CN 216067968 U CN216067968 U CN 216067968U CN 202122122574 U CN202122122574 U CN 202122122574U CN 216067968 U CN216067968 U CN 216067968U
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- 238000009415 formwork Methods 0.000 claims abstract description 60
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 230000002401 inhibitory effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 15
- 238000013519 translation Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000008602 contraction Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
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Abstract
The utility model relates to the technical field of connecting pieces or other accessories for a formwork, a working frame structure or a template, and discloses an automatic end formwork dismounting device capable of avoiding the end part of a box girder from collapsing, which comprises an end formwork and a formwork dismounting device anchored on the side formwork close to the end formwork; the form removing device comprises a form removing jack, one end of the form removing jack is hinged with the top of the form removing jack through a vertical pin shaft, the other end of the form removing jack horizontally extends to the edge of the end formwork far away from the form removing jack, and the form removing jack is a double-acting jack; the prying lever is connected with the end template through a connecting rod. According to the utility model, through the double-acting jack and the lever system, the process of manually and carefully removing the formwork is simulated, and after the whole end formwork is pried and loosened, the end formwork is pushed out in a translation manner, so that local stress is not too large and the end formwork is not collided, and the end part of the poured box girder is complete.
Description
Technical Field
The utility model relates to the technical field of connecting pieces or other accessories for a formwork, a working frame structure or a template, in particular to an automatic end formwork dismounting device capable of avoiding the end part of a box girder from collapsing.
Background
The hollow box girder is a girder body with large using amount in a highway bridge and is generally formed by pouring through a special mould in a prefabricated field. The mould mainly comprises a side mould plate, an end mould plate and a core mould.
For the purpose of convenient connection, the box girder tip can leave reserved reinforcing bar (whipping), for the purpose of convenient prestressing force stretch-draw, can follow length direction in the box girder and set up bellows and/or prestressing tendons of wearing out both ends, these components all need pierce through the end template setting, also can open out the hole of big or small greatly on the end template consequently, these holes inevitably have a certain amount of concrete thick liquid infiltration, cause the adhesion, can not take off like easily the side template, but need extract with the help of large-scale apparatus such as portal crane by force, perhaps rely on workman's violence to demolish.
In order to facilitate the removal of the formwork and the maintenance, the formwork is not removed until the concrete is completely solidified in the conventional pouring process of the box girder, but the formwork is removed when the concrete is solidified to the strength of about two megapascals, and the edge breakage or the anchor opening breakage can be caused by slight collision (for example, the hole wall of an end formwork touches an exposed reinforcing steel bar or corrugated pipe) and local overlarge stress (local breakage or adhesion of a large concrete) in the formwork removing process. At present, the end mould dismantling mode of hard pulling or violent dismantling of a gantry crane is difficult to control, and collision and local overlarge stress almost inevitably occur, so that the end part of the box girder inevitably has defects needing to be repaired after pouring is completed, and the appearance and the strength are influenced.
When the construction period is sufficient, the treatment mode of the template with serious adhesion on the construction site is that various small tools are adopted to loosen the edge of the template, and then the template is taken down by force little by little, but the time consumption is long, the method is not practical for the box girder with large demand, and in addition, the method can influence the appearance of the edge of the box girder to a certain extent.
SUMMERY OF THE UTILITY MODEL
The utility model provides an automatic end die dismounting device capable of avoiding end part collapse of a box girder.
The technical problem to be solved is that: at present, the box girder end template is dismantled by means of hard pulling of a gantry crane or manual violent dismantling, and defects are inevitably caused.
In order to solve the technical problems, the utility model adopts the following technical scheme: an automatic end formwork dismounting device capable of avoiding end part collapse of a box girder comprises an end formwork and a formwork dismounting device anchored on a side formwork close to the end formwork;
the form removing device comprises a form removing jack, one end of the form removing jack is hinged to the top of the form removing jack through a vertical pin shaft, the other end of the form removing jack horizontally extends to the edge, far away from the form removing jack, of the end formwork, and the form removing jack is a double-acting jack;
the prying lever is connected with the end template through a connecting rod, the connecting rod comprises an end connecting rod and a rear connecting rod, one end of the end connecting rod is hinged with the prying lever through a vertical pin shaft, the other end of the end connecting rod is parallel to the length direction of the box girder, extends towards the end template and is anchored at the edge of the end template far away from the form removal jack, one end of the rear connecting rod is hinged with the prying lever through a vertical pin shaft, and the other end of the rear connecting rod is parallel to the length direction of the box girder, extends towards the end template and is anchored at the edge of the end template close to the form removal jack;
the top side surface of the form removal jack is anchored with an angle limiting block which is positioned in an inferior angle between the form removal jack and the prying lever and used for inhibiting the inferior angle from being smaller than 90 degrees;
and each end of the box girder is provided with two end templates which are bilaterally symmetrical and spliced into a whole, and the form removing devices correspond to the end templates one by one and are arranged on the side templates adjacent to the corresponding end templates.
Further, the left edge and the right edge of the end template are respectively anchored with a stabilizing lath parallel to the edge, and the end connecting rod and the rear connecting rod are respectively anchored on the end template through the corresponding stabilizing laths.
Further, the side surfaces of the connecting rods are respectively anchored with angle limiting blocks which are positioned in inferior angles formed by the connecting rods and the prying lever and used for inhibiting the inferior angles from being smaller than 90 degrees, and the angle limiting blocks on the two connecting rods are arranged close to each other.
Furthermore, the bottom of the form removal jack is hinged to a jack base extending outwards from the side formwork through a vertical pin shaft, a form moving jack is arranged between a sleeve of the form removal jack and the adjacent side formwork, the bottom of the form moving jack is anchored to the side formwork, and the top of the form moving jack is hinged to the side face of the sleeve of the form removal jack through the vertical pin shaft.
Further, the form removal jack is provided with a pressure sensor for detecting the jacking force of the form removal jack and a tension sensor for detecting the tension of the form removal jack.
Further, the form removal jack and the form moving jack are both electric jacks, and the form removal jack and the form moving jack are provided with length sensors for measuring the strokes of the jacks.
Furthermore, the automatic die dismounting and mounting device also comprises a PID controller, and each die dismounting jack, the die moving jack, the pressure sensor, the tension sensor and the length sensor in each die dismounting device are respectively electrically connected with the PID controller.
Furthermore, the prying lever is detachably connected with each connecting rod respectively, and the side template is provided with a fixing device for accommodating the form removal jack and the prying lever.
Compared with the prior art, the automatic end die dismounting device capable of avoiding the end part of the box girder from collapsing has the following beneficial effects:
according to the utility model, through a double-acting jack (capable of pushing and pulling) and a lever system, a process of manually and carefully disassembling the formwork is simulated, one side edge is firstly pried and loosened by taking the rear connecting rod as a fulcrum, then the force application direction of the jack is turned, the other side edge is pried and loosened by taking the end connecting rod as the fulcrum, after the whole end formwork is pried and loosened, the end formwork is pushed out in a translation manner, so that the end formwork is not subjected to overlarge local stress and can not be collided, the defects of edge breakage, anchor recess breakage and the like at the end part of the box girder are avoided, and the end part of the poured box girder is complete;
according to the utility model, the angle limiting block is arranged, so that the end template is prevented from being deformed and inclined too much to collide in the processes of prying, loosening and translation, and the prying lever and the connecting rod are both hard rods, so that compared with a cable of a gantry crane, the transmission force can be more accurate, and the collision is further avoided;
in the utility model, the PID controller is adopted to operate the electric jack to fully automatically complete the die removing process, and workers only need to connect the prying lever to the connecting rod, so that the labor intensity is reduced, and the production efficiency is improved;
in the utility model, the die removal process is precisely monitored by the sensor, so that the collision between the swing rib and the corrugated pipe due to the inclination of the template during die removal is further avoided.
Drawings
FIG. 1 is a schematic structural diagram of an automatic end mold dismounting and mounting device capable of avoiding end collapse of a box girder according to the present invention;
FIG. 2 is a schematic view of the arrangement of the stabilizing slats;
FIG. 3 is a schematic diagram of the arrangement of the form-shifting jack;
the device comprises an 11-end template, a 12-side template, a 21-form removal jack, a 22-jack base, a 31-prying lever, a 32-angle limiting block, a 41-end connecting rod, a 42-rear connecting rod, a 43-stabilizing batten and a 5-form moving jack.
Detailed Description
As shown in fig. 1-3, an automatic end form dismantling device capable of avoiding the end portion of a box girder from collapsing comprises an end form 11 and a form dismantling device anchored on a side form 12 at a position close to the end form 11. Note that the sideforms 12 are supported on the faces of the end forms 11, and the edges of the box girder are prevented from being pressed when the end forms 11 are pried loose.
The end formwork 11 is inclined, which means that the end formwork 11 is not parallel to the end surface of the poured box girder, and under the condition, the swing ribs and the corrugated pipes collide with the end formwork 11.
The form removing device comprises a form removing jack 21 with the bottom anchored on the side template 12 and the top parallel to the length direction of the box girder and extending to the end template 11 and exceeding the end template 11, and a prying lever 31 with one end hinged with the top of the form removing jack 21 through a vertical pin shaft and the other end horizontally extending to the edge of the end template 11 far away from the form removing jack 21, wherein the form removing jack 21 is a double-acting jack; that is to say the form removal jack 21 here needs to be able to be pushed and pulled.
The prying lever 31 is connected with the end formwork 11 through a connecting rod, the connecting rod comprises an end connecting rod 41 and a rear connecting rod 42, one end of the end connecting rod is hinged with the prying lever 31 through a vertical pin shaft, the other end of the end connecting rod is parallel to the length direction of the box girder, extends towards the end formwork 11 and is anchored at the edge of the end formwork 11 far away from the form removal jack 21, one end of the rear connecting rod is hinged with the prying lever 31 through a vertical pin shaft, and the other end of the rear connecting rod is parallel to the length direction of the box girder, extends towards the end formwork 11 and is anchored at the edge of the end formwork 11 close to the form removal jack 21.
Note that the prying lever 31 and the end die plate 11 are actually deformable due to their large size, and cannot be regarded as rigid bodies. The parallelogram structure enclosed by the two connecting rods, the end template 11 and the prying lever 31 comprises two rigid nodes, namely nodes connecting the connecting rods and the end template 11, but still can be deformed to a certain extent, so that the process of prying and loosening the end template 11 can be smoothly carried out.
An angle limiting block 32 which is positioned in a minor angle between the form removal jack 21 and the prying lever 31 and is used for inhibiting the minor angle from being smaller than 90 degrees is anchored on the side surface of the top of the form removal jack 21. The angle limiting block 32 is mainly used for driving the template to move horizontally after the template is pried and loosened, so that the template is prevented from being inclined to collide with the swing rib and the corrugated pipe, and the angle limiting block does not play a limiting role when the template removing jack 21 contracts, so that the template 11 at the pried and loosened end is prevented from being influenced. In this embodiment, all the angle limiting blocks 32 are hard blocks such as steel blocks, but hard rubber blocks can be selected, so that the prying is smoother, but the possibility of collision is increased.
Two end formworks 11 which are bilaterally symmetrical and spliced into a whole are arranged at each end of the box girder, and the form removing devices correspond to the end formworks 11 one by one and are arranged on the side formworks 12 adjacent to the corresponding end formworks 11. The section formwork is divided into two parts, so that the stroke required by each jack in the embodiment can be greatly reduced, the possibility of collision can be reduced, and the end formwork 11 can be pried and loosened more easily.
The left and right edges of the end forms 11 are respectively anchored with stabilizing slats 43 parallel to the edges, and the end links 41 and the rear links 42 are respectively anchored to the end forms 11 through the corresponding stabilizing slats 43. The stabilizing laths 43 are used for uniformly distributing the force of the connecting rods on the end templates 11, reducing shaking and collision, and ribbed plates or inclined struts can be arranged between the connecting rods and the stabilizing laths 43 when necessary to further strengthen the effect.
The side surfaces of the connecting rods are respectively anchored with angle limiting blocks 32 which are positioned in inferior angles formed by the connecting rods and the prying lever 31 and used for inhibiting the inferior angles from being smaller than 90 degrees, and the angle limiting blocks 32 on the two connecting rods are arranged close to each other. The two angle limiting blocks 32 have similar functions, the angle is not limited when the connecting rod is used as a fulcrum, and the connecting rod takes effect when the end template 11 is pulled by the connecting rod, so that the phenomenon that the template is deformed too much and collides with a sling and a corrugated pipe is avoided.
The bottom of the form removing jack 21 is hinged with a jack base 22 extending outwards from the side formwork 12 through a vertical pin shaft, a form moving jack 5 is arranged between a sleeve of the form removing jack 21 and the adjacent side formwork 12, the bottom of the form moving jack 5 is anchored on the side formwork 12, and the top of the form moving jack is hinged with the side face of the sleeve of the form removing jack 21 through a vertical pin shaft. The form-shifting jack 5 is not necessary here, but is provided to automatically transfer the form to the side of the mould after it has been set up, facilitating the subsequent removal of the core.
The form removal jack 21 is provided with a pressure sensor for detecting the jacking force thereof and a tension sensor for detecting the tension thereof.
The form removal jack 21 and the form moving jack 5 are both electric jacks, and the form removal jack 21 and the form moving jack 5 are provided with length sensors for measuring the strokes of the jacks.
The automatic end mold dismounting device also comprises a PID controller, and each mold dismounting jack 21, the mold moving jack 5, the pressure sensor, the tension sensor and the length sensor in each mold dismounting device are respectively electrically connected with the PID controller. Various sensors are common in the market, such as a length sensor formed by a magnetic grating ruler and a reading head, and the like, and are freely purchased and used according to requirements, so that the detailed description is omitted.
The prying lever 31 is detachably connected with each connecting rod respectively, and in the embodiment, a steel ball bolt with a pull ring is selected to be used as a pin shaft to connect the prying lever 31 with each connecting rod. The sideforms 12 are provided with fixing means for receiving the form removal jack 21 and the prying lever 31.
The use method of the automatic end formwork dismounting device capable of avoiding the end part of the box girder from collapsing is characterized in that the automatic end formwork dismounting device capable of avoiding the end part of the box girder from collapsing is adopted to finish formwork dismounting of the end formwork 11, and the use method comprises the following steps:
the method comprises the following steps: compiling a model removal program of the PID controller, which comprises the following specific steps:
1.1: the form removing jack 21 is contracted, the rear connecting rod 42 is taken as a fulcrum, and the edge of the end template 11 where the end connecting rod 41 is located is pried; when the pulling force detected by the pulling force sensor is suddenly reduced, the edge of the end template 11 where the end connecting rod 41 is positioned is proved to be pried and loosened, and the retraction of the form removal jack 21 is stopped;
1.2: the jacking and form-removing jack 21 pries the edge of the end template 11 where the rear connecting rod 42 is located by taking the end connecting rod 41 as a fulcrum; when the pressure detected by the pressure sensor is suddenly reduced, the edge of the end formwork 11 where the rear connecting rod 42 is located is proved to be pried loose, the pressure F at the moment is recorded, and the form removal jack 21 is continuously jacked;
1.3: setting the maximum jacking stroke L of the form removal jack 21 according to the length of the steel slinger of the box girder and the exposed length of the corrugated pipe, when the jacking stroke of the form removal jack 21 reaches L, completely separating the end template 11 from the steel slinger and the corrugated pipe, stopping jacking the form removal jack 21 at the moment, and starting jacking the form moving jack 5 to move the end template 11 to the side surface of the mold;
if the pressure detected by the pressure sensor in the jacking process of the form removal jack 21 exceeds F, the end formwork 11 is proved to be inclined in the jacking process, and then jacking is immediately stopped;
for particularly severe adhesion templates, steps 1.1 and 1.2 may be cycled back and forth multiple times, followed by step 1.3.
Step two: unfastening the fixing device and connecting the prying lever 31 and the connecting rod;
step three: and controlling the mould removing device by using a PID controller to complete the mould removing of the end mould plate 11.
Of course, the mold closing of the end mold plate 11 can also be completed by the mold removing device, which comprises the following steps:
note that, in order to facilitate mold closing, the mold-moving jack 5 also needs to be provided with a tension sensor here;
step A: the mold closing program of the PID controller is programmed, and the specific steps are as follows:
step a 1: setting the contraction limit force of the form removing jacks 21, recording the contraction limit force as fa, synchronously contracting the two form removing jacks 21 positioned at the same end of the box girder, when the pulling force detected by the pressure sensor reaches fa, proving that the end template 11 is tightly pressed on the side template 12, and stopping contracting the form removing jacks 21;
step a 2: setting the contraction limit force of the mould moving jacks 5, recording the contraction limit force as fb, synchronously contracting the two mould moving jacks 5 positioned at the same end of the box girder, and when the tension detected by the pressure sensor reaches fb, proving that the two end templates 11 are tightly spliced, and stopping contracting the mould moving jacks 5;
and B: the corrugated pipes penetrate out of the anchor backing plate holes on the end die one by one, and if the flail bars exist, the flail bars penetrate out of the corresponding holes; then, sealing strips are arranged on the surfaces of the two end templates 11 which are attached to each other;
and C: the fixing device is unfastened, the prying lever 31 and the connecting rod are connected, and the two prying levers 31 at the same end of the box girder are coaxially connected into a whole;
step D: controlling the mold removing device by using a PID controller to complete mold closing of the end mold plate 11;
step E: and completing the connection of the templates and the sealing of the holes and the seams.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (8)
1. The utility model provides a can avoid the automatic dismouting end mould device that case beam-ends portion bursts out which characterized in that: comprises an end formwork (11) and a form removing device anchored on the side formwork (12) near the end formwork (11);
the form removing device comprises a form removing jack (21) with the bottom anchored on the side template (12) and the top parallel to the length direction of the box girder and extending to the end template (11) and exceeding the end template (11), and a prying lever (31) with one end hinged with the top of the form removing jack (21) through a vertical pin shaft and the other end horizontally extending to the edge of the end template (11) far away from the form removing jack (21), wherein the form removing jack (21) is a double-acting jack;
the prying lever (31) is connected with the end template (11) through a connecting rod, the connecting rod comprises an end connecting rod (41) and a rear connecting rod (42), one end of the end connecting rod is hinged with the prying lever (31) through a vertical pin shaft, the other end of the end connecting rod is parallel to the length direction of the box girder, extends towards the end template (11) and is anchored at the edge of the end template (11) far away from the form removal jack (21), one end of the rear connecting rod is hinged with the prying lever (31) through a vertical pin shaft, and the other end of the rear connecting rod is parallel to the length direction of the box girder, extends towards the end template (11) and is anchored at the edge of the end template (11) close to the form removal jack (21);
the top side surface of the form removal jack (21) is anchored with an angle limiting block (32) which is positioned in an inferior angle between the form removal jack (21) and the prying lever (31) and used for inhibiting the inferior angle from being smaller than 90 degrees;
each end of the box girder is provided with two end templates (11) which are bilaterally symmetrical and spliced into a whole, and the form removing devices correspond to the end templates (11) one by one and are arranged on the side templates (12) adjacent to the corresponding end templates (11).
2. The automatic end die dismounting device capable of avoiding the end part of the box girder from collapsing as claimed in claim 1, is characterized in that: the left edge and the right edge of the end template (11) are respectively anchored with a stabilizing lath (43) parallel to the edge, and the end connecting rod (41) and the rear connecting rod (42) are respectively anchored on the end template (11) through the corresponding stabilizing lath (43).
3. The automatic end die dismounting device capable of avoiding the end part of the box girder from collapsing as claimed in claim 2, is characterized in that: the side surfaces of the connecting rods are respectively anchored with angle limiting blocks (32) which are positioned in inferior angles formed by the connecting rods and the prying lever (31) and used for inhibiting the inferior angles from being smaller than 90 degrees, and the angle limiting blocks (32) on the two connecting rods are arranged close to each other.
4. The automatic end die dismounting device capable of avoiding the end part of the box girder from collapsing as claimed in claim 3, is characterized in that: the bottom of the form removal jack (21) is hinged to a jack base (22) extending outwards from the side formwork (12) through a vertical pin shaft, a form removal jack (5) is arranged between a sleeve of the form removal jack (21) and the adjacent side formwork (12), the bottom of the form removal jack (5) is anchored on the side formwork (12), and the top of the form removal jack is hinged to the side face of the sleeve of the form removal jack (21) through the vertical pin shaft.
5. The automatic end die dismounting device capable of avoiding the end part of the box girder from collapsing as claimed in claim 4, is characterized in that: the form removal jack (21) is provided with a pressure sensor for detecting the jacking force of the form removal jack and a tension sensor for detecting the tension of the form removal jack.
6. The automatic end die dismounting device capable of avoiding the end part of the box girder from collapsing as claimed in claim 5, is characterized in that: the form removal jack (21) and the form moving jack (5) are both electric jacks, and the form removal jack (21) and the form moving jack (5) are provided with length sensors for measuring the strokes of the jacks.
7. The automatic end die dismounting device capable of avoiding the end part of the box girder from collapsing as claimed in claim 6, is characterized in that: the automatic die removing and assembling device further comprises a PID controller, and each die removing jack (21), the die moving jack (5), the pressure sensor, the tension sensor and the length sensor in each die removing device are electrically connected with the PID controller respectively.
8. The automatic end die dismounting device capable of avoiding the end part of the box girder from collapsing as claimed in claim 7, wherein: the prying levers (31) are detachably connected with the connecting rods respectively, and fixing devices used for accommodating the form removal jacks (21) and the prying levers (31) are arranged on the side templates (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122122574.4U CN216067968U (en) | 2021-09-03 | 2021-09-03 | Automatic end die dismounting device capable of avoiding end part of box girder from collapsing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122122574.4U CN216067968U (en) | 2021-09-03 | 2021-09-03 | Automatic end die dismounting device capable of avoiding end part of box girder from collapsing |
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| CN216067968U true CN216067968U (en) | 2022-03-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113815104A (en) * | 2021-09-03 | 2021-12-21 | 中国建筑土木建设有限公司 | Automatic end mold dismounting and mounting device for beam yard and using method thereof |
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2021
- 2021-09-03 CN CN202122122574.4U patent/CN216067968U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113815104A (en) * | 2021-09-03 | 2021-12-21 | 中国建筑土木建设有限公司 | Automatic end mold dismounting and mounting device for beam yard and using method thereof |
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Granted publication date: 20220318 |