CN219060971U - Crack control device for post-pouring strip of expansive concrete - Google Patents

Abstract

The application relates to the technical field of concrete post-pouring strips, in particular to an expansive concrete post-pouring strip crack control device, which comprises a first baffle and a second baffle, wherein the first baffle and the second baffle are used for restraining and limiting two sides of concrete, two ends of the top of the first baffle and two ends of the top of the second baffle are respectively provided with a limiting frame, limiting rods are connected between two limiting frames of each end in a sliding mode, a positioning assembly used for fixing is arranged on each limiting frame, and a shielding plate used for shielding the top of the concrete is arranged between the two limiting rods. The method has the effects of reducing the possibility of cracking of the post-cast strip caused by expansion of the expanded concrete after casting is completed, and improving the durability and structural safety of the post-cast strip.

Description

Crack control device for post-pouring strip of expansive concrete

Technical Field

The application relates to the technical field of concrete post-pouring strips, in particular to an expansive concrete post-pouring strip crack control device.

Background

The post-cast strip is a concrete strip reserved at corresponding positions of a foundation slab, a wall and a beam according to design or construction specification requirements in order to prevent harmful cracks possibly generated due to uneven self shrinkage or uneven settlement of a cast-in-situ reinforced concrete structure in building construction. By arranging the post-pouring belt, the large-area concrete structure can be subjected to block construction, so that the construction progress is quickened, the construction period is shortened, and the design of the building structure is simplified.

In the existing construction process, an expanding agent is added into concrete to form expanded concrete, so that the capability of compensating shrinkage and generating self-stress functions of the concrete is improved, and meanwhile, the strength of the concrete is improved. The concrete doped with the expanding agent can expand differently in the early stage of wet curing than the common concrete, and can shrink in the dry curing stage as the common concrete.

The existing concrete post-cast strip is expanded upwards after casting of the post-cast strip, so that the concrete surface of the post-cast strip is subjected to larger tensile force, the side surface of the concrete of the post-cast strip is easily separated from the original cast concrete by pulling under the action of the tensile force, cracks appear on two sides of the post-cast strip, the durability and the structural safety of the post-cast strip are affected, water possibly permeates into the casting structure through the cracks, and the supporting structures such as steel bars in the inside are corroded, so that the durability and the structural safety of a building are affected.

Disclosure of Invention

In order to reduce the possibility of cracking of the post-cast strip caused by expansion of the expanded concrete after casting is completed so as to improve the durability and structural safety of the post-cast strip, the application provides an expanded concrete post-cast strip crack control device.

The application provides an expansive concrete post-cast strip crack controlling means adopts following technical scheme:

the utility model provides an expansive concrete post-cast strip crack controlling means, is including being used for restricting first baffle and the second baffle of restriction to the concrete both sides, the both ends at first baffle top the both ends at second baffle top all are provided with spacing frame, and two at every end sliding connection has the gag lever post between the spacing frame, every be provided with on the spacing frame and be used for fixed locating component, two be provided with between the gag lever post and be used for the shielding plate that shelters from the concrete.

Through adopting above-mentioned technical scheme, during the use, put first baffle and second baffle in the both sides of post-cast strip, remove positioning component's fixed relation, slide spacing frame and drive first baffle and second baffle and remove, until first baffle and second baffle respectively with post-cast strip both sides butt, fix with positioning component, utilize the shielding plate to play the effect that shelters from to post-cast strip top simultaneously, because the shielding plate shelter from for the concrete can't the upward expansion, the concrete both sides can not receive great pulling force, the possibility of concrete both ends atress fracture has been reduced, the durability and the structural safety of post-cast strip have been improved.

Optionally, the locating component is including articulating connecting block on the spacing frame, the rigid coupling has the locating plate on the connecting block, one of them end rigid coupling of locating plate has the connecting plate, the connecting plate with the rigid coupling has the spring between the spacing frame, the other end rigid coupling of connecting plate has the locating piece, offer a plurality of confession on the gag lever post locating piece male spacing hole.

Through adopting above-mentioned technical scheme, through pressing the spring, under the effect of connecting block, the locating plate rigid coupling has the one end perk of locating piece for the locating piece pops out from spacing downthehole, then can slide spacing frame in order to realize the regulation to the interval between first baffle and the second baffle on the gag lever post, after the regulation is accomplished, loosens the spring and realizes resetting, and the locating piece inserts in the suitable spacing downthehole in order to realize fixedly.

Optionally, the post-cast strip crack control device for expanded concrete further comprises a spraying assembly for spraying water to the concrete for curing.

By adopting the technical scheme, the concrete water spraying curing device is used for spraying water to concrete for curing.

Optionally, the spray assembly is including setting up the movable rod on the first baffle, the inside shaping of movable rod has the cavity that is used for the water storage, the movable rod is close to one side intercommunication of shielding plate and has a plurality of shower nozzles that are used for the water spray, a plurality of the shower nozzle all with the cavity intercommunication, be provided with on the first baffle and be used for to the water delivery assembly of cavity transportation water.

Through adopting above-mentioned technical scheme, the cavity that water delivery subassembly was the movable rod carries water, and the shower nozzle spouts water in order to realize the maintenance to the concrete.

Optionally, the water delivery subassembly is including fixing backup pad on the first baffle, be provided with the water pump in the backup pad, the water inlet and the outside water source intercommunication of water pump, the delivery port intercommunication of water pump has the water pipe, the water pipe intercommunication extremely the cavity.

By adopting the technical scheme, the water pump is started, and pumps water into the cavity of the movable rod and sprays the water out through the spray head, so that the concrete is maintained.

Optionally, a driving component for driving the moving rod to move is arranged on the first baffle.

By adopting the technical scheme, the driving component drives the moving rod to move.

Optionally, the drive assembly is including fixing the fixed plate on the first baffle, be fixed with servo motor on the fixed plate, servo motor's output shaft rigid coupling has the carousel, the rigid coupling has the bull stick on the carousel, the carousel sets up the eccentric department of carousel, the bull stick rotates and is connected with the rotating frame, the rotating frame is close to the one end rigid coupling of movable rod has the abnormal shape gear, movable rod sliding connection is in on the first baffle just movable rod upper surface shaping has the rack, the abnormal shape gear with the rack engagement.

Through adopting above-mentioned technical scheme, start servo motor, servo motor's output shaft drives the carousel and rotates, and the bull stick makes rotation frame and abnormal shape gear rotate, and abnormal shape gear just drives the movable rod and removes for the shower nozzle can realize bigger coverage area, like this, the water that the shower nozzle sprayed can both be covered by the concrete surface of whole pouring, thereby improves the maintenance effect of concrete.

Optionally, the servo motor is coupled with a controller for controlling the servo motor to realize forward rotation and reverse rotation.

Through adopting above-mentioned technical scheme, realize carriage release lever reciprocating motion, further improve the effect of shower nozzle to concrete watering.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the device comprises a first baffle, a second baffle and a shielding plate, wherein limiting frames are arranged on the first baffle and the second baffle, limiting rods are connected to the limiting frames in a sliding mode, the shielding plates are connected with the limiting rods in a sliding mode, positioning components are arranged on the limiting rods, concrete poured by a post-pouring belt can be restrained through the first baffle, the second baffle and the shielding plates, the possibility that cracks occur to the post-pouring belt due to expansion of the expanded concrete after pouring is completed is reduced, and the distance between the first baffle and the second baffle can be adjusted by the aid of the limiting frames, the limiting rods and the positioning components, so that restraining limitation on concrete poured by the post-pouring belt with different sizes is achieved;

2. the water pump, the water pipe, the movable rod and the spray heads are arranged, the cavity for storing water is formed in the movable rod, the spray heads are communicated with the cavity, the water pipe is communicated with the cavity, the water tank continuously conveys water to the cavity, the water sprays the post-cast strip from the spray heads, the situation that the post-cast strip is seriously dry shrinkage of concrete poured in the post-cast strip is easy to occur during airing can be prevented, and therefore the post-cast strip cannot be used;

3. the application is provided with servo motor, carousel, bull stick, rotating frame and abnormal shape gear, and servo motor drives the carousel and rotates, and the rotation of carousel drives the bull stick and rotates to drive the rotating frame and rotate, the rotation of rotating the frame drives abnormal shape gear and rotates, drives the movable rod after abnormal shape gear and the movable rod meshing and removes, and the removal of movable rod drives to spout and remove, thereby realizes shower nozzle spun water and covers whole post-cast strip concrete surface.

Drawings

FIG. 1 is a schematic structural view of an expanded concrete post-cast strip crack control device in the present application;

FIG. 2 is a schematic diagram of the connection relationship of a limit frame, a limit rod and a shielding plate of the crack control device of the post-cast strip of the expansive concrete;

FIG. 3 is an enlarged view at A in FIG. 2;

fig. 4 is a schematic diagram of the connection relationship among the servo motor, the rotating frame and the moving rod of the crack control device for the post-cast strip of the expansive concrete.

Reference numerals illustrate: 1. a first baffle; 2. a second baffle; 3. a limit frame; 4. a limit rod; 5. a shielding plate; 6. a limiting hole; 7. a positioning assembly; 701. a spring; 702. a connecting plate; 703. a positioning plate; 704. a connecting block; 705. a U-shaped plate; 706. a positioning block; 8. a spray assembly; 801. a moving rod; 802. a spray head; 9. a positioning frame; 10. a drive assembly; 1001. a fixing plate; 1002. a servo motor; 1003. a turntable; 1004. a rotating rod; 1005. a rotating frame; 1006. a special gear; 1007. a rack; 11. a water delivery assembly; 1101. a support plate; 1102. a water pump; 1103. a water pipe.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

The embodiment of the application discloses crack control device of post-cast strip of expanded concrete, refer to fig. 1, crack control device of post-cast strip of expanded concrete is including being used for carrying out first baffle 1 and the second baffle 2 that shelter from to the post-cast strip both sides respectively, the rigid coupling has two sets of spacing frame 3 on first baffle 1 and the second baffle 2, two sets of spacing frame 3 set up respectively at the top at the both ends of first baffle 1, second baffle 2, two spacing frame 3 parallel relative arrangement in every group, two spacing frame 3 in every group are fixed respectively in the one side that first baffle 1 and second baffle 2 deviate from, wear to have gag lever post 4 between two spacing frame 3 of every group, sliding connection has shielding plate 5 between two gag lever post 4, be provided with on the spacing frame 3 and be used for carrying out fixed locating component 7 to first baffle 1 and second baffle 2.

The first baffle 1 and the second baffle 2 shelter from fixedly to the both sides of post-cast strip poured concrete, and the top of the concrete of post-cast strip pouring is sheltered from fixedly to the shielding plate 5 for the concrete can't expand upwards because shielding plate 5 shelters from, and the concrete both sides can not receive great tensile force, have reduced the possibility that concrete both ends atress fracture, have improved the durability and the structural security of post-cast strip.

Specifically, referring to fig. 2 and 3, each of the limit rods 4 is slidably connected with two corresponding limit frames 3, so that the distance between the first baffle 1 and the second baffle 2 is adjustable. Like this, constructor can slide spacing frame 3 in order to adjust the distance between first baffle 1 and the second baffle 2 according to the post-cast strip of equidimension, and reuse locating component 7 is fixed spacing frame 3 for this device has wider suitability in order to satisfy different work demands.

Every spacing frame 3 is last all to be provided with locating component 7, locating component 7 is including articulating the connecting block 704 at spacing frame 3 top, connecting block 704 bottom rigid coupling has the U template 705 that is used for the leveling effect, the opening of U template 705 sets up the direction towards connecting block 704, the top rigid coupling of U template 705 has locating plate 703, the one end rigid coupling that locating plate 703 is close to spacing frame 3 has horizontal connecting plate 702, the rigid coupling has spring 701 between connecting plate 702 and the spacing frame 3, the one end rigid coupling that locating plate 703 kept away from spring 701 has locating piece 706, a plurality of spacing holes 6 that can supply locating piece 706 male have been seted up on the gag lever post 4, a plurality of spacing holes 6 are along the even interval distribution of length direction of gag lever post 4.

Through pressing spring 701, under the effect of connecting block 704, locating plate 703 rigid coupling has the one end perk of locating piece 706 for locating piece 706 pops up in spacing hole 6, then can slide spacing frame 3 on gag lever post 4 in order to realize the regulation to the interval between first baffle 1 and the second baffle 2, after the regulation is accomplished, loosens spring 701 and realizes the reset, and locating piece 706 inserts in the suitable spacing hole 6 in order to realize fixedly.

Of course, the positioning assembly 7 may also use connectors such as jackscrews, screws, pins, etc., which are easy to loosen, and the connection strength may not be ensured due to stress, and the expected restriction effect may not be achieved, compared with the positioning assembly 7 used in the present embodiment.

After the concrete is poured, if the concrete is not cured in time, moisture in the concrete can evaporate too quickly to form a dehydration phenomenon, so that cement particles with gel can not be fully hydrated, can not be converted into stable crystals, and lack sufficient cohesive force, thereby flaky or powdery falling off can occur on the surface of the concrete. In addition, when the concrete has not enough strength, too early evaporation of water can generate larger shrinkage deformation and dry shrinkage cracks appear.

Referring to fig. 1, in order to facilitate the water spraying maintenance of the concrete after the post-cast strip is cast, the possibility of the occurrence of dry cracking of the concrete is reduced, thereby improving the durability and structural safety of the post-cast strip. The device is also provided with a spray assembly 8 for sprinkling water to the poured concrete.

The spray assembly 8 comprises two positioning frames 9 fixedly connected to two sides of the first baffle plate 1, the two positioning frames 9 are oppositely arranged, a moving rod 801 is arranged on the two positioning frames 9 in a penetrating mode, one side, close to the shielding plate 5, of the moving rod 801 is communicated with a plurality of spray heads 802, the spray heads 802 are evenly distributed at intervals along the length direction of the moving rod 801, a cavity for storing water is formed in the moving rod 801, the spray heads 802 are communicated with the cavity, and a water delivery assembly 11 for delivering water to the cavity is arranged on one side, deviating from the shielding plate 5, of the first baffle plate 1. The water delivery assembly 11 delivers water to the chamber of the movable bar 801 and the spray head 802 sprays the water to effect curing of the concrete.

The water delivery assembly 11 comprises a supporting plate 1101 fixedly connected to the first baffle plate 1, a water pump 1102 for pumping water is fixed on the supporting plate 1101, a water inlet of the water pump 1102 is communicated with an external water source, a water outlet of the water pump 1102 is communicated with a water pipe 1103, one end, far away from a water outlet of the water tank, of the water pipe 1103 is communicated with the movable rod 801, and the water pipe 1103 is communicated with the cavity. The water pump 1102 is started, and the water pump 1102 pumps water into the cavity of the movable rod 801 and sprays the water out through the spray head 802 so as to realize the maintenance of the concrete.

Of course, the concrete surface may be provided with a humidity sensor, the humidity sensor is coupled with a controller, the water pump 1102 is also coupled with the controller, an upper threshold value and a lower threshold value are set in the controller, the humidity sensor detects the humidity of the concrete surface in real time and transmits the value to the controller for the controller to compare with the upper threshold value and the lower threshold value, when the value received by the controller is greater than the upper threshold value, the controller controls the water pump 1102 to be turned off, and the spray head 802 does not spray water to the concrete any more; when the value received by the controller is smaller than the lower threshold value, the controller controls the water pump 1102 to be turned on, and the spray head 802 sprays water to the concrete for curing. Thus, the water sprinkling maintenance can be performed according to the concrete surface condition, and the inconvenience caused by manual control or the water resource waste caused by the fact that the water pump 1102 pumps water to the spray nozzle 802 all the time is avoided.

Referring to fig. 1 and 4, a fixed plate 1001 is fixedly connected to one side of the first baffle 1, which is away from the shielding plate 5, a driving assembly 10 for driving the moving rod 801 to move is arranged, the driving assembly 10 comprises a servo motor 1002 fixedly connected to one side of the fixed plate 1001, which is away from the shielding plate 5, an output shaft of the servo motor 1002 is fixedly connected with a rotary table 1003, one side of the rotary table 1003, which is away from the output shaft of the servo motor 1002, is fixedly connected with a rotary rod 1004, the rotary rod 1004 is fixed at an eccentric position of the rotary table 1003, which is close to the peripheral surface of the rotary table 1003, a rotating frame 1005 is rotatably connected to the rotary rod 1004, one end of the rotating frame 1005, which is close to the moving rod 801, is fixedly connected with a special gear 1006, the moving rod 801 is slidably connected with two positioning frames 9, a rack 1007 is formed on one side of the moving rod 801, which is close to the special gear 1006, and the special gear 1006 is meshed with the rack 1007.

The servo motor 1002 is started, the output shaft of the servo motor 1002 drives the rotary table 1003 to rotate, the rotary rod 1004 enables the rotary frame 1005 and the special gear 1006 to rotate, the special gear 1006 drives the movable rod 801 to move, and the spray head 802 can achieve a larger coverage area, so that the whole poured concrete surface can be covered by water sprayed by the spray head 802, and the curing effect of concrete is improved.

In order to realize the reciprocating movement of the moving rod 801 and further improve the effect of the spray head 802 on the concrete spraying, the servo motor 1002 is coupled with a controller (not shown in the figure), in this embodiment, the controller may adopt a PLC controller, and when the special gear 1006 moves to two ends of the rack 1007, the controller will control the servo motor 1002 to reverse to realize that the special gear 1006 drives the moving rod 801 to move in the opposite direction, so that the reciprocating movement of the moving rod 801 is realized.

Of course, the driving unit 10 may be a linear motor, a ball screw mechanism, or the like, and in this embodiment, a rack and pinion mechanism is used as an example.

Of course, it will be appreciated that since the moving rod 801 is in a moving state, there is a reserved length of the water pipe 1103 communicating with the moving rod 801, i.e., when the moving rod 801 moves horizontally, the water pump 1102 can normally supply water into the chamber of the moving rod 801.

The implementation principle of the crack control device for the post-pouring strip of the expansive concrete is as follows: when the device is used, the first baffle plate 1 and the second baffle plate 2 are placed on two sides of the post-pouring belt, the positioning block 706 is pulled out from the inside of the limiting hole 6 after the spring 701 is pressed, the sliding limiting frame 3 drives the first baffle plate 1 and the second baffle plate 2 to move until the first baffle plate 1 and the second baffle plate 2 are respectively abutted against two sides of the post-pouring belt, and then the pressed spring 701 is loosened, so that the spring 701 rebounds to drive the positioning block 706 to be inserted into the inside of the limiting hole 6, and meanwhile, the shielding effect of the shielding plate 5 on the top of the post-pouring belt is achieved. Simultaneously, with water pump 1102 and outside water source intercommunication, open water pump 1102 and servo motor 1002, shower nozzle 802 sprays water maintenance to the concrete, servo motor 1002 indirectly drives movable rod 801 and removes to improve the maintenance effect. In this way, with the first barrier 1, the second barrier 2, and the shielding plate 5 and the corresponding spray assemblies 8, the possibility of cracking of the post-cast strip due to expansion of the expanded concrete after casting is reduced, so as to improve durability and structural safety of the post-cast strip.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides an expansive concrete post-cast strip crack controlling means which characterized in that: including being used for retraining first baffle (1) and second baffle (2) of restriction to the concrete both sides, the both ends at first baffle (1) top the both ends at second baffle (2) top all are provided with spacing frame (3), and two at every end sliding connection has gag lever post (4) between spacing frame (3), every be provided with on spacing frame (3) and be used for fixed locating component (7), two be provided with between gag lever post (4) and be used for shielding baffle (5) to the concrete top.

2. The expanded concrete post-cast strip crack control device according to claim 1, wherein: the locating component (7) comprises a connecting block (704) hinged to the limiting frame (3), a locating plate (703) is fixedly connected to the connecting block (704), a connecting plate (702) is fixedly connected to one end of the locating plate (703), a spring (701) is fixedly connected between the connecting plate (702) and the limiting frame (3), a locating block (706) is fixedly connected to the other end of the connecting plate (702), and a plurality of limiting holes (6) capable of being used for the locating block (706) to be inserted are formed in the limiting rod (4).

3. The expanded concrete post-cast strip crack control device according to claim 1, wherein: the device for controlling the crack of the post-cast strip of the expanded concrete further comprises a spraying assembly (8) for spraying water to the concrete for curing.

4. The expansive concrete post-cast strip crack control device of claim 3, wherein: the spraying assembly (8) comprises a moving rod (801) arranged on the first baffle plate (1), a cavity for storing water is formed in the moving rod (801), one side, close to the shielding plate (5), of the moving rod (801) is communicated with a plurality of spray heads (802) for spraying water, the spray heads (802) are communicated with the cavity, and the first baffle plate (1) is provided with a water delivery assembly (11) for delivering water to the cavity.

5. The expanded concrete post-cast strip crack control device according to claim 4, wherein: the water delivery assembly (11) comprises a supporting plate (1101) fixed on the first baffle (1), a water pump (1102) is arranged on the supporting plate (1101), a water inlet of the water pump (1102) is communicated with an external water source, a water outlet of the water pump (1102) is communicated with a water pipe (1103), and the water pipe (1103) is communicated to the cavity.

6. The expanded concrete post-cast strip crack control device according to claim 4, wherein: the first baffle (1) is provided with a driving component (10) for driving the moving rod (801) to move.

7. The expanded concrete post-cast strip crack control device according to claim 6, wherein: the driving assembly (10) comprises a fixing plate (1001) fixed on the first baffle (1), a servo motor (1002) is fixed on the fixing plate (1001), a rotary table (1003) is fixedly connected to an output shaft of the servo motor (1002), a rotary rod (1004) is fixedly connected to the rotary table (1003), the rotary rod (1004) is arranged at an eccentric position of the rotary table (1003), a rotating frame (1005) is rotatably connected to the rotary frame (1004), a special gear (1006) is fixedly connected to one end of the rotating frame (1005) close to the moving rod (801), the moving rod (801) is slidably connected to the first baffle (1) and a rack (1007) is formed on the upper surface of the moving rod (801), and the special gear (1007) is meshed with the rack.

8. The expanded concrete post-cast strip crack control device according to claim 7, wherein: the servo motor (1002) is coupled with a controller for controlling the servo motor (1002) to realize forward rotation and reverse rotation.

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