Hogging moment steel bar protective layer and floor thickness double-control device

Abstract

The invention discloses a hogging moment steel bar protective layer and floor thickness double-control device which comprises a support (1), mounting grooves (11) are symmetrically formed in the two opposite sides of the periphery of the upper portion of the support (1), and the mounting grooves (11) are used for mounting upper hogging moment steel bars (4); the steel bar limiting clamping pieces (2) are installed on the installation grooves (11) in a sliding mode and used for limiting the upper-layer hogging moment steel bars (4) and preventing the upper-layer hogging moment steel bars (4) from being disengaged upwards. The device is simple in structure and novel and reasonable in design, displacement of the steel bars is prevented, meanwhile, the device serves as a floor thickness reference, the floor thickness is controlled, and the thickness deviation of a protective layer is reduced; compared with a traditional steel bar stirrup, the stirrup is high in strength and rigidity, not prone to deformation and capable of better fixing the position of the hogging moment steel bar on the upper layer, and the phenomenon that a protective layer is too thick due to displacement of the steel bar caused by compressive deformation of the stirrup rib is avoided.

Description

Technical Field

[0001] The present invention relates to a stirrup support, specifically to a device for double control of the protective layer of negative moment reinforcement and the floor slab thickness, belonging to the technical field of auxiliary construction supplies for building engineering construction. Background Art

[0002] Generally speaking, in the construction of cast-in-place floor slabs in building engineering, the slab thickness is an important quality control point in construction. However, due to reasons such as inappropriate slump of concrete materials, deviation in formwork installation, or lack of experience of construction workers, the qualified rate of the slab thickness has not reached an ideal state. To improve the qualified rate of the structural floor slab thickness, it is necessary to effectively control the position of the steel bar skeleton during construction, ensure the effective thickness between the double-layer steel bars of the structural floor slab, and enable reliable bonding between the steel bars and the concrete. As a result, the over-thickness of the protective layer of the upper negative moment reinforcement and the deviation of the floor slab thickness are common problems in building construction projects.

[0003] Currently, there are two main reasons for the over-thickness of the protective layer: First, during the construction of the upper negative moment reinforcement, due to reasons such as trampling, laying pump pipes, and stacking materials, the position moves downward, resulting in an over-thick protective layer. In construction, there are stirrup bars to support the negative moment reinforcement of the steel bars, but the stirrup bars are relatively soft and cannot completely prevent the steel bars from moving downward due to trampling, stacking, etc.; Second, when pouring concrete for the floor slab, the signs for controlling the thickness are generally on the column bars and side forms around the slab, lacking a reference inside the slab, and the thickness control is inaccurate. The floor slab is prone to being too thick or too thin during pouring. Currently, it is mainly too thick, which not only causes the deviation of the floor slab thickness but also indirectly causes the deviation of the steel bar protective layer thickness to exceed the allowable range of the specification.

[0004] In many construction sites, for the convenience and speed of construction, most of the control of the thickness of cast-in-place concrete floor slabs in many construction sites still uses traditional methods such as pulling lines and using steel stirrups, and marking elevation control lines on the side forms of the floor slab, column bars, or column inserted bars to control the floor slab thickness. These methods have disadvantages such as large control errors, inconspicuousness, and no control in the mid-span. Practice has proved that these reasons have caused deviations or exceedances of the floor slab thickness during construction, posing potential safety hazards to the cast-in-place floor slab structure and increasing the construction difficulties and costs for later maintenance.

[0005] Currently, double-control blocks are also used at construction sites. The double-control blocks for the floor slab thickness and the protective layer thickness made of concrete on the market have the disadvantages of low strength, small volume, being easily broken when trampled, and being easily toppled by lateral forces, and cannot well achieve the functions of protective layer and thickness control.

[0006] After retrieval, the patent with the Chinese patent publication number CN 206457999 U discloses a steel bar stirrup for construction engineering, including the main body (1) of the steel bar stirrup for construction engineering. Concrete filling cavities (2) are provided at the bottoms of the four side walls of the main body (1) of the steel bar stirrup for construction engineering, and the four groups of concrete filling cavities (2) communicate with each other. A steel bar support seat (3) is arranged at the center of the top of the main body (1) of the steel bar stirrup for construction engineering. An articulated groove (4) is provided at the top of the steel bar support seat (3). A cross-shaped steel bar articulated frame (6) is arranged in the inner cavity of the articulated groove (4), and the four brackets of the cross-shaped steel bar articulated frame (6) are all connected to the inner side walls of the steel bar support seat (3). Steel bar connection grooves (5) are arranged at the centers of the tops of the four side walls of the steel bar support seat (3), and the four groups of steel bar connection grooves (5) are all located above the cross-shaped steel bar articulated frame (6). The above patent has the following deficiencies: only the steel bars are limited in position, but the steel bars are not effectively fixed. In this case, the steel bars are easily affected by external objects. When the operator accidentally touches the stirrup and the steel bars during the construction process, the steel bars may fall off the stirrup, resulting in the need for rework, increasing the cost, and ultimately resulting in large deviations in the floor slab thickness and the cover thickness. In short, it is often very inconvenient.

[0007] Therefore, the key to solving the above technical problems is to develop a device with strong practicability and high working reliability for double control of the negative moment steel bar cover and the floor slab thickness. Summary of the Invention

[0008] In view of the many defects and deficiencies in the above background technology, the present invention has made improvements and innovations. The purpose is to provide a device with a simple structure, novel and reasonable design, high control precision, and small error. By using this device, the displacement of steel bars is prevented, the upper negative moment steel bars (4) are prevented from popping out or coming off due to the trampling of construction workers, the rework error is reduced, and at the same time, as a reference for the floor slab thickness, the control of the floor slab thickness is also realized, and the deviation of the cover thickness is reduced.

[0009] Another object of the present invention is to use the reinforcement limiting member (3) in combination with the present invention to realize the stable binding and fixing limit of the upper row of steel bars, effectively control the steel bar spacing, better fix the position of the upper negative moment steel bars, and prevent the cover from being too thick due to the compression deformation of the stirrup bars resulting in the displacement of the steel bars;

[0010] To solve the above problems and achieve the above object of the invention, a device for double control of the negative moment steel bar cover and the floor slab thickness of the present invention is realized by adopting the following design structure and the following technical solutions:

[0011] A device for double control of the negative moment steel bar cover and the floor slab thickness, including:

[0012] Support (1), installation grooves (11) are symmetrically formed on opposite sides around the upper part of the support (1), and the installation grooves (11) are used for installing upper layer negative moment steel bars (4);

[0013] Steel bar limiting and clamping member (2), the steel bar limiting and clamping member (2) is slidably installed on each installation groove (11) and is used for limiting the upper layer negative moment steel bar (4) to prevent the upper layer negative moment steel bar (4) from slipping out upwards.

[0014] Preferably, the steel bar limiting and clamping member (2) includes:

[0015] Fixed block (21), the fixed block (21) is slidably clamped on one side inside the installation groove (11), and a sliding installation groove (211) is formed inside the fixed block (21);

[0016] Clamping component (22), the clamping component (22) is detachably installed in the sliding installation groove (211).

[0017] Preferably, clamping grooves (212) adapted to the installation grooves (11) are formed in the middle of both sides of the fixed block (21);

[0018] The sliding installation groove (211) is obliquely and penetratingly formed on the fixed block (21), and an internal thread section is provided at one end of the sliding installation groove (211).

[0019] Preferably, the clamping component (22) includes:

[0020] Clamping column (221), the clamping column (221) is slidably installed at the other end inside the sliding installation groove (211);

[0021] Locking block (222), the locking block (222) is threadedly connected to the internal thread section of the sliding installation groove (211);

[0022] Expansion member (223), one end of the expansion member (223) is sleeved on the outer side of the clamping column (221), and the other end of the expansion member (222) is connected to the locking block (222).

[0023] Preferably, the fixed block (21) is integrally square; the sliding installation groove (211) includes an installation groove section for installing the clamping component (22) and a sliding groove section for slidably installing the clamping column (221), and the diameter of the installation groove section is larger than that of the sliding groove section.

[0024] Preferably, a clamping ring (224) for connecting the expansion member (223) is connected to the outer wall of one end of the clamping column (221), and an inclined surface (2211) is provided at the other end of the clamping column (221).

[0025] Preferably, the expansion member (223) is a spring.

[0026] Preferably, the installation grooves (11) are provided in four pairs arranged opposite to each other, and the grooving depths of any two opposite installation grooves (11) are less than those of the other two opposite installation grooves (11).

[0027] Preferably, it further includes: the support (1) is a square steel, and scale lines (12) are engraved on the square steel, and the scale lines (12) extend from the bottom edge along the height direction of the support (1) to the top edge.

[0028] Preferably, it further includes at least one reinforcing and limiting member (3) that cooperates with it to complete the work, and the reinforcing and limiting member (3) is provided on any one side or multiple sides of the support (1); one end of the reinforcing and limiting member (3) is connected to the upper layer of negative moment steel bars (4), and the other end is connected to the lower layer of negative moment steel bars (5).

[0029] The working principle is: Before using a device for double control of the negative moment steel bar protection layer and the floor slab thickness with the above-mentioned designed structure, it is necessary to manually or by means of corresponding handling equipment transport the device that has been manufactured to the designated working position and install it as a standby.

[0030] During use, the operator first lays the lower layer of negative moment transverse steel bars and the lower layer of negative moment longitudinal steel bars of the lower layer of negative moment steel bars (5) on the floor slab according to the construction standard requirements, and then, according to the construction requirements, places a reasonable number of the present invention at the designated appropriate position. Subsequently, the operator installs the upper layer of negative moment longitudinal steel bars in the installation grooves (11) with a higher grooving depth according to the position of the lower layer of negative moment steel bars (5), and installs the upper layer of negative moment transverse steel bars in the installation grooves (11) with a lower grooving depth; when the upper layer of negative moment steel bars (4) contacts the two steel bar limiting and clamping members (2) arranged oppositely inside the corresponding installation grooves (11), under the dual pressures of its own gravity and inertia and the pressing gravity of the operator, the clamping columns (221) of the two steel bar limiting and clamping members (2) simultaneously move obliquely downward, thereby driving the telescopic members (223) to be compressed downward. When the upper layer of negative moment steel bars (4) slides and is clamped in the clamping groove formed by the two steel bar limiting and clamping members (2), the two clamping columns (221) quickly reset under the elastic action of the corresponding telescopic members (223). When resetting, the two opposite clamping columns (221) are in close contact with each other in a lapped manner, thereby clamping the upper layer of negative moment steel bars (4) in the clamping groove formed by the two steel bar limiting and clamping members (2), and preventing them from popping out or falling off, completing the installation work of the upper layer of negative moment steel bars (4), ensuring that during the concrete pouring process, the deformation amount and relative displacement of the steel bars are reduced, and the quality of the floor slab pouring is improved.

[0031] Finally, concrete is poured. After the concrete pouring is completed, this device does not need to be removed and is poured into the floor slab as part of the floor slab reinforcement. Through the mutual cooperation with the stirrup bars, the present invention can further improve the qualified rate of the thickness of the cast-in-place concrete floor slab.

[0032] The beneficial effects of the present invention compared with the prior art are as follows:

[0033] 1. The structure of the present invention is simple and the design is novel and reasonable. By using this device, the displacement of the steel bars is prevented. At the same time, as a reference for the floor slab thickness, it also realizes the control of the floor slab thickness and reduces the deviation of the protective layer thickness.

[0034] 2. Compared with the traditional steel bar stirrups, the present invention has higher strength and stiffness, is not easy to deform, can better fix the position of the upper layer of negative moment steel bars, and prevent the over-thickness of the protective layer caused by the displacement of the steel bars due to the compression deformation of the stirrup bars.

[0035] 3. The present invention overcomes the problem that the traditional stirrup bars have different thicknesses from the floor slab and cannot be used as a reference for the control of the floor slab thickness. The device of this patent has the same thickness as the floor slab and can be placed in the floor slab as a reference for the floor slab thickness to prevent the floor slab from being too thick or too thin.

[0036] 4. Since the present invention is further combined with the reinforcement limiting member, the upper row of steel bars can be stably tied and fixed in position, and the steel bar spacing can be effectively controlled.

[0037] 5. The structure of the present invention is reasonable and simple, easy to manufacture and produce, and convenient and flexible to use. During operation, the device is directly placed on the formwork. At the same time, after the floor slab is poured, this device is completely covered and will not have any impact on the construction, and has strong anti-construction interference ability.

[0038] 6. The structure of the present invention is simple and easy to use. It is made of square steel, which saves costs, is simple to manufacture, and convenient to operate, which is beneficial to the construction of workers and has high applicability. Through the mutual cooperation of this control device and the reinforcement limiting member, the qualified rate of the thickness of the cast-in-place concrete floor slab can be further improved. It can be adjusted according to the thickness of the structural floor slab and the position of the steel bars, and has a good quality control effect on the floor slab thickness. At the same time, through this device, the accuracy of the floor slab thickness and the operability of construction control are ensured, the thickness of the cast-in-place concrete floor slab is effectively controlled, the construction quality is improved, the working hours are saved, the construction cost is reduced, and the construction quality of the steel bars and concrete is guaranteed.

[0039] 7. The present invention has the advantages of stable structure and not easy to deform, which makes the stirrup bars have stronger compressive capacity and more stable support; it solves the technical problem that the traditional stirrup bars have relatively weak anti-trampling ability in use.

[0040] 8. The present invention solves the technical problem that the traditional structure only limits the position of the steel bar but does not effectively fix the steel bar. In this case, the steel bar is easily affected by foreign objects. If the operator accidentally touches the stirrup and the steel bar during the construction process, the steel bar may fall off the stirrup. The present invention not only limits the position of the steel bar but also effectively fixes the steel bar, making it not easily affected by foreign objects.

[0041] 9. The exterior of the present invention is coated with anti-rust paint and a waterproof layer, which can prevent rust and extend the service life of the entire device, achieving environmental protection while saving resources. At the same time, the exterior of the device is coated with self-luminous fluorescent material, which can clearly mark the position of the line-laying device at night or in a dark room or underground construction environment, and can effectively serve as a safety reminder, improve conspicuousness, and be easy for people to identify, thereby increasing safety in construction and life. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0043] Figure 1 It is one of the schematic diagrams of the use state of the present invention;

[0044] Figure 2 This is the second schematic diagram of the use state of the present invention;

[0045] Figure 3 This is the third schematic diagram of the use state of the present invention;

[0046] Figure 4 It is one of the overall structural schematic diagrams of the present invention;

[0047] Figure 5 This is the second schematic diagram of the overall structure of the present invention;

[0048] Figure 6 It is one of the overall structural schematic diagrams of another design structure of the present invention;

[0049] Figure 7 This is the second overall structural schematic diagram of another design structure of the present invention;

[0050] Figure 8 It is a cross-sectional schematic diagram of a steel bar limiting clamp (2) component of the present invention;

[0051] Figure 9 It is a schematic diagram of the overall structure of the limit clamp (2) component of the present invention;

[0052] Figure 10 The third schematic diagram of the overall structure of another design structure of the present invention is shown in FIG.

[0053] Figure 11 It is a schematic diagram of the overall structure of the reinforcement limiting part (3) component of the present invention;

[0054] Figure 12 It is a schematic diagram of the overall structure of another design structure of the reinforcement limiting part (3) component of the present invention;

[0055] Figure 13 It is a schematic diagram of the overall structure of the reinforcement limiting tooling (6) component of the present invention;

[0056] Among them, the reference numerals in the figure: 1—support, 11—installation groove, 12—scale line;

[0057] 2—steel bar limiting clip, 21—fixed block, 211—sliding installation groove, 212—card slot, 22—clamping component, 221—clamping column, 2211—inclined surface, 222—locking block, 223—expansion member, 224—clamping ring;

[0058] 3—reinforcement limiting part, 31—upper limiting part, 311—upper clamping part, 32—lower limiting part, 321—lower clamping part;

[0059] 4—upper layer negative moment steel bar;

[0060] 5—lower layer negative moment steel bar;

[0061] 6—reinforcement limiting tooling, 61—handheld handle, 62—working body. Specific implementation mode

[0062] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the technical solutions of the present invention will be further described in detail below in conjunction with the drawings and specific implementation modes. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and embodiments.

[0063] To sum up, a more specific implementation mode of the present invention is:

[0064] Embodiment 1

[0065] As shown in the attached specification Figure 3 to the attached specification Figure 5 A device for double control of the negative moment steel bar protection layer and the floor slab thickness is shown, which is characterized in that it includes:

[0066] A support 1, and installation grooves 11 are symmetrically opened on opposite sides of the upper part of the support 1 all around, and the installation grooves 11 are used for installing the upper layer negative moment steel bar 4;

[0067] The steel bar limiting clip 2 is slidably installed on each installation groove 11 and is used to limit the upper layer of negative moment steel bars 4 to prevent the upper layer of negative moment steel bars 4 from protruding upward.

[0068] In the present invention, the upper layer of negative moment steel bars 4 includes upper layer of negative moment transverse steel bars and upper layer of negative moment longitudinal steel bars.

[0069] Further, as Figure 8 shown, the steel bar limiting clip 2 includes:

[0070] A fixed block 21, the fixed block 21 is slidably clamped on one side inside the installation groove 11, and a sliding installation groove 211 is opened inside the fixed block 21;

[0071] A clamping component 22, the clamping component 22 is detachably installed in the sliding installation groove 211.

[0072] Specifically, as Figure 8 shown, both middle parts on both sides of the fixed block 21 are provided with clamping grooves 212 adapted to the installation groove 11;

[0073] The sliding installation groove 211 is obliquely and penetratingly opened on the fixed block 21. Among them, one end of the sliding installation groove 211 is provided with an internal thread section.

[0074] Specifically, as Figure 8 shown, the clamping component 22 includes:

[0075] A clamping column 221, the clamping column 221 is slidably installed at the other end inside the sliding installation groove 211;

[0076] A locking block 222, the locking block 222 is threadedly connected to the internal thread section of the sliding installation groove 211;

[0077] An expansion member 223, one end of the expansion member 223 is sleeved outside the clamping column 221, and the other end of the expansion member 222 is connected to the locking block 222.

[0078] Specifically, as Figures 8 to 9 shown, the fixed block 21 is integrally square-shaped; the sliding installation groove 211 includes an installation groove section for installing the clamping component 22 and a sliding groove section for slidably installing the clamping column 221. Among them, the diameter of the installation groove section is larger than the diameter of the sliding groove section.

[0079] Specifically, as Figure 8 and Figure 9 shown, a clamping ring 224 for connecting the expansion member 223 is connected to the outer wall of one end of the clamping column 221, and an inclined surface 2211 is provided at the other end of the clamping column 221.

[0080] Furthermore, a protective sleeve matching with the clamping column 221 is sleeved on the outer surface thereof, and the protective sleeve is a rubber protective sleeve, and a plurality of rubber protective protrusions of a connected structure are arranged on the outside of the rubber protective sleeve.

[0081] Therefore, since a protective sleeve with protective protrusions on the outside is provided at the contact connection position between the clamping column 221 and the upper negative bending moment steel bar 4, it can not only play a protective role and ensure the structural integrity of the clamping column 221 and the upper negative bending moment steel bar 4, but also increase the friction at the connection, so that when the upper negative bending moment steel bar 4 is downwardly inserted into the clamping column 221, it is limitedly connected to the clamping column 221 to form an integral structure.

[0082] Specifically, Figure 8 As shown, the telescopic member 223 is a spring.

[0083] Further, such as Figure 7 As shown, the installation grooves 11 are provided as four grooves arranged opposite to each other in pairs, wherein the groove depth of any two opposite installation grooves 11 is smaller than the groove depth of another two opposite installation grooves 11 .

[0084] Before using the device for dual control of negative bending moment steel bar protective layer and floor slab thickness of the above-mentioned design structure, the completed device needs to be transported to the designated work location manually or with corresponding transport equipment and installed as a standby.

[0085] During use, the operator first lays the lower layer of negative moment transverse steel bars and the lower layer of negative moment longitudinal steel bars of the lower layer of negative moment steel bars 5 on the floor slab according to the construction standard requirements, and then places a reasonable number of the present invention at the designated appropriate position according to the construction requirements. Subsequently, the operator installs the upper layer of negative moment longitudinal steel bars in the installation groove 11 with a high groove depth according to the position of the lower layer of negative moment steel bars 5, and then installs the upper layer of negative moment transverse steel bars in the installation groove 11 with a low groove depth; when the upper layer of negative moment steel bars 4 are in contact with the two steel bar limiting clamps 2 arranged oppositely inside the corresponding installation groove 11, the upper layer of negative moment steel bars 4 are under the action of their own gravity and inertia and the operator's pressure Under the dual pressure of gravity, the clamping columns 221 of the two steel bar limiting clamps 2 move obliquely downward at the same time, thereby driving the telescopic member 223 to compress downward. When the upper negative bending moment steel bar 4 slides and is clamped in the clamping groove formed by the two steel bar limiting clamps 2, the two clamping columns 221 are quickly reset under the elastic action of the corresponding telescopic member 223. During the reset, the two relative clamping columns 221 overlap and contact each other closely, thereby clamping the upper negative bending moment steel bar 4 in the clamping groove formed by the two steel bar limiting clamps 2, and it will not pop out or fall off, completing the installation of the upper negative bending moment steel bar 4, ensuring that during the concrete pouring process, the deformation and relative displacement of the steel bars are reduced, thereby improving the quality of floor slab pouring.

[0086] Finally, the concrete is poured. After the concrete pouring is completed, the device does not need to be removed and is poured into the floor slab as a part of the floor slab reinforcement. The invention can further improve the thickness qualification rate of the cast-in-place concrete floor slab by cooperating with the stirrup reinforcement.

[0087] Example 2

[0088] Embodiment 2 is basically the same as Embodiment 1, the only difference being that, based on Embodiment 1, an anti-skid pad is further provided at the bottom of the mounting groove 11, and the anti-skid pad is a rubber protective pad, and a plurality of rubber protective protrusions of a connected structure are provided on the outside of the rubber protective pad.

[0089] When in use, since an anti-slip pad with external protective protrusions is provided at the contact connection position between the installation groove 11 and the upper negative bending moment steel bar 4, it can not only play a protective role, but also ensure the structural integrity of the installation groove 11 and the upper negative bending moment steel bar 4, while also increasing the friction at the connection, so that the upper negative bending moment steel bar 4 can be inserted into the installation groove 11, and is limitedly connected to the installation groove 11 to form an integral structure.

[0090] The specific installation is the same as that in Example 1 and will not be described again here.

[0091] Example 3

[0092] Example 3 is basically the same as Example 1 and Example 2, with the only difference being that, based on Example 1 and Example 2, it further includes: the support 1 is a square steel, on which a scale line 12 is engraved, and the scale line 12 extends from the bottom edge along the height direction of the support 1 to the top edge.

[0093] In the present invention, the setting height of the support 1 is equal to the casting thickness of the floor slab.

[0094] It can be seen that since the support 1 is also engraved with a scale line 12 with a height equal to the casting thickness of the floor slab, the specific thickness of the cast floor slab can be clearly known, and the operator can be more intuitively prompted to the amount of concrete to be poured, making the concrete pouring more accurate, ensuring the pouring accuracy and meeting the construction requirements.

[0095] The specific installation is the same as that of Example 1 and Example 2, and will not be repeated here.

[0096] Example 4

[0097] like Figure 1 , Figure 2 and Figure 7 as well as Figure 10As shown, Example 4 is the same as Examples 1 to 3, with the only difference being that it also includes at least one reinforcing limiter 3 for working in conjunction therewith, and the reinforcing limiter 3 is arranged on any one side or multiple sides of the support 1; one end of the reinforcing limiter 3 is connected to the upper layer of negative bending moment steel bars 4, and the other end is connected to the lower layer of negative bending moment steel bars 5.

[0098] Furthermore, the reinforcing limit member 3 is a steel S-shaped or C-shaped member as a whole, or a combination of S-shaped or C-shaped members, one end of the S-shaped or C-shaped member is an upper limit member (31) of the connected structure, and the other end is a lower limit member (32) of the connected structure.

[0099] Specifically, the upper limit member (31) extends upward from the top of the reinforcement limit member 3 and bends toward the front or back of the reinforcement limit member 3 to form a U-shaped hook.

[0100] Specifically, the lower limiting member (32) extends downward from the bottom of the reinforcing limiting member 3 and bends toward the back or front of the reinforcing limiting member 3 to form a U-shaped hook.

[0101] More specifically, an upper clamping member (311) is further provided on the inner side wall of the upper limit member (31), and the upper clamping member (311) is fixedly arranged near the free end of the upper limit member (31);

[0102] A lower clamping member (321) is also provided on the inner side wall of the lower limiting member (32), and the lower clamping member (321) is fixedly arranged near the free end of the lower limiting member (32).

[0103] Furthermore, the reinforcement limiter 3 and the support 1 are a separate structure or a connected structure.

[0104] Furthermore, the upper negative bending moment reinforcement 4 is composed of a plurality of reinforcements arranged in a criss-cross pattern, wherein an upper limit positioning member (31) is installed on the upper negative bending moment reinforcement 4, and the upper limit positioning member (31) is set on the upper negative bending moment reinforcement 4 by means of a limiting rope or is directly tied to the intersection of the reinforcements arranged in a criss-cross pattern.

[0105] Furthermore, the lower layer of negative bending moment steel bars 5 is composed of a plurality of steel bars arranged in a crisscross pattern, wherein a lower limit member (32) is installed on the lower layer of negative bending moment steel bars 5, and the lower limit member (32) is set on the lower layer of negative bending moment steel bars 5 by being tied with a limit rope or is directly tied at the intersection of the steel bars arranged in a crisscross pattern.

[0106] During the entire implementation process of this Embodiment 4, it also includes a reinforcement and position-limiting tooling 6 in the prior art. The reinforcement and position-limiting tooling 6 includes a handheld handle 61 and a working body 62. Among them, the handheld handle 61 is an overall steel straight bar-shaped member. At the outer wall of any one end edge of the straight bar-shaped member, there is a working body 62, and the working body 62 is an ordinary nut, a hexagonal nut, or a flat head nut.

[0107] Before using the device for double control of the negative moment steel bar protective layer and floor slab thickness with the above design structure in the above Embodiment 4, it is necessary to transport the device that has been manufactured to the designated working position manually or by corresponding handling equipment and install it for standby.

[0108] Before use, the reinforcement and position-limiting member 3 is manufactured. During manufacturing, according to actual usage requirements, waste steel bars are cut into straight bars of a certain length in batches. That is, the front end and the rear end of the reinforcement and position-limiting member 3 both use the lever principle to be sleeved into the lower working body (62) of the reinforcement and position-limiting tooling 6 at the lower end to be bent into a lower position-limiting member (32), and the lower position-limiting member (32) of the reinforcement and position-limiting member 3 is bent into a U shape. Subsequently, the upper end of the reinforcement and position-limiting member 3 is bent into an upper position-limiting member (31), and the upper position-limiting member (31) of the reinforcement and position-limiting member 3 is bent into a U shape for standby use.

[0109] After the above structure is manufactured, it needs to be installed. Specifically during installation, at first, the operator first lays the lower negative moment transverse steel bars and lower negative moment longitudinal steel bars of the lower negative moment steel bars 5 on the floor slab according to the construction standard requirements. Then, according to the construction requirements, a reasonable number of the present invention is placed at the designated appropriate position. Subsequently, according to the position where the lower negative moment steel bars 5 are arranged, the upper negative moment longitudinal steel bars are installed in the installation groove 11 with a higher grooving depth, and the upper negative moment transverse steel bars are installed in the installation groove 11 with a lower grooving depth; when the upper negative moment steel bars 4 come into contact with the two steel bar position-limiting and clamping members 2 oppositely arranged inside the corresponding installation groove 11, under the dual pressures of the self-gravity and inertia of the upper negative moment steel bars 4 and the pressing gravity of the operator, the clamping columns 221 of the two steel bar position-limiting and clamping members 2 simultaneously move obliquely downward, thereby driving the telescopic member 223 to be compressed downward. When the upper negative moment steel bars 4 are slidably clamped in the clamping groove formed by the two steel bar position-limiting and clamping members 2, the two clamping columns 221 quickly reset under the elastic action of the corresponding telescopic member 223. During resetting, the two opposite clamping columns 221 are in close contact with each other in a lapping manner, thereby clamping the upper negative moment steel bars 4 in the clamping groove formed by the two steel bar position-limiting and clamping members 2, and preventing them from popping out or falling off, completing the installation work of the upper negative moment steel bars 4, ensuring that during the concrete pouring process, the deformation amount and relative displacement of the steel bars are reduced, and the floor slab pouring quality is improved.

[0110] Immediately afterwards, the operator slips the lower limit member (32) of the reinforcement limit member 3 with one end bent into the intersection of the longitudinal and transverse bars of the lower negative moment reinforcement 5 or onto the transverse bar of the lower negative moment reinforcement 5. The other end of the reinforcement limit member 3 extends towards the intersection of the longitudinal and transverse bars of the upper negative moment reinforcement 4 or onto the longitudinal bar, and the upper limit member (31) of the reinforcement limit member 3 is just slipped into the intersection of the longitudinal and transverse bars of the upper negative moment reinforcement 4 or onto the longitudinal bar. At this time, through the upper limit member (31) and the lower limit member (32) of the reinforcement limit member 3, the upper and lower layer steel bars of the structural floor slab can be just fixed, that is, the upper negative moment reinforcement 4 and the lower negative moment reinforcement 5 are fixed, ensuring that during the concrete pouring process, the deformation amount and relative displacement of the steel bars are reduced, and the pouring quality of the floor slab is improved.

[0111] After installation, it can be used immediately. The operation process during use is as follows: This device will act together with the reinforcement limit member 3 to fix and support the upper negative moment reinforcement 4 and the lower negative moment reinforcement 5. After the concrete pouring is completed, this device does not need to be removed and is poured into the floor slab as part of the floor slab steel bars. Through the mutual cooperation with the stirrup bars, the present invention can further improve the qualified rate of the thickness of the cast-in-place concrete floor slab, prevent the displacement of the steel bars, and at the same time, as a reference for the floor slab thickness, it can also control the floor slab thickness and reduce the deviation of the protective layer thickness.

[0112] On the basis of Embodiments 1 to 4, an injection layer, a waterproof layer, an anti-rust layer, and a warning layer are sequentially sprayed from the inside to the outside on the outer surfaces of the support 1, the steel bar limit card member 2, and the reinforcement limit member 3, and fluorescent powder is applied to the warning layer.

[0113] In the present invention, a high molecular wear-resistant material is injection-molded on the injection layer; the anti-rust layer includes an epoxy zinc-rich primer, a chlorinated rubber topcoat, and an epoxy mica iron intermediate coat located between the epoxy zinc-rich primer and the chlorinated rubber topcoat; the waterproof layer is a polyurethane waterproof coating; the warning layer is a yellow or black reflective warning tape or reflective color film or reflective paint. Therefore, since the anti-rust paint and the waterproof layer are applied to the exterior of the present invention, rust can be prevented while the service life of the entire device is extended, environmental protection is achieved while resources are saved. At the same time, a self-luminous fluorescent material is applied to the exterior of the device, which can clearly indicate the position of the setting-out device at night, in a dark room, or in an underground construction environment, effectively playing a role in safety warning, improving the visibility, being easy for people to distinguish, and increasing the safety during construction and daily life.

[0114] At the same time, in the present invention, the connections referred to are all fixed connections or movable connections or detachable connections. Among them, the fixed connection is a welded connection or directly processed into an integral formed structure; the movable connection or detachable connection is a hinged connection, a threaded connection, a bayonet connection, a plug-in connection, or a bolt assembly connection or a screw connection.

[0115] During the entire above-described implementation process, there is also a reinforcement and positioning tooling 6 in the prior art. The reinforcement and positioning tooling 6 includes a handheld handle 61 and a working body 62. Among them, the handheld handle 61 is an overall steel flat bar-shaped member, and the working body 62 is provided on the outer wall at any one end edge of the flat bar-shaped member. The working body 62 is an ordinary nut, a hexagonal nut, or a flat head nut.

[0116] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A device for dual control of negative bending moment steel bar protective layer and floor slab thickness, characterized in that: include: A support (1), wherein mounting grooves (11) are symmetrically provided on opposite sides of the upper part of the support (1), and the mounting grooves (11) are used to install the upper negative bending moment steel bars (4); The steel bar limiting clamp (2) is slidably mounted on each mounting groove (11) and is used to limit the upper layer of negative bending moment steel bars (4) to prevent the upper layer of negative bending moment steel bars (4) from falling out upwards.

2. A device for controlling the thickness of negative moment reinforcement protective layer and floor slab according to claim 1, characterized in that: The steel bar limiting clamp (2) comprises: A fixed block (21), the fixed block (21) is slidably engaged with one side of the mounting groove (11), and a sliding mounting groove (211) is provided inside the fixed block (21); The clamping assembly (22) is detachably mounted in the sliding mounting groove (211).

3. A device for controlling the thickness of negative moment reinforcement protective layer and floor slab according to claim 2, characterized in that: The middle parts of both sides of the fixing block (21) are provided with clamping grooves (212) adapted to the mounting grooves (11); The sliding installation groove (211) is obliquely penetrated and opened on the fixed block (21), wherein one end of the sliding installation groove (211) is provided with an internal thread section.

4. The device for controlling the negative moment reinforcement protective layer and floor slab thickness according to claim 2, characterized in that: The clamping assembly (22) comprises: A clamping column (221), the clamping column (221) is slidably mounted at the other end of the sliding mounting groove (211); A locking block (222), the locking block (222) is threadedly connected to the internal thread section of the sliding installation groove (211); The telescopic member (223) has one end sleeved on the outside of the clamping column (221), and the other end of the telescopic member (222) is connected to the locking block (222).

5. The device for controlling the negative moment reinforcement protective layer and floor slab thickness according to claim 2, characterized in that: The fixing block (21) is of a square structure as a whole; the sliding installation groove (211) comprises an installation groove section for installing the clamping assembly (22) and a sliding groove section for slidingly installing the clamping column (221), wherein the diameter of the installation groove section is greater than the diameter of the sliding groove section.

6. The device for controlling the thickness of negative moment reinforcement protective layer and floor slab according to claim 4, characterized in that: The outer wall of one end of the clamping column (221) is connected to a clamping ring (224) for connecting to the telescopic member (223), and the other end of the clamping column (221) is provided with an inclined surface (2211).

7. The device for controlling the thickness of negative moment reinforcement protective layer and floor slab according to claim 4, characterized in that: The telescopic member (223) is a spring.

8. The device for controlling the thickness of negative moment reinforcement protective layer and floor slab according to claim 1, characterized in that: The installation grooves (11) are arranged in pairs, with four being arranged opposite to each other, wherein the groove depth of any two opposite installation grooves (11) is smaller than the groove depth of another two opposite installation grooves (11).

9. The device for controlling the thickness of negative moment reinforcement protective layer and floor slab according to claim 1, characterized in that: Also includes: The support (1) is a square steel, on which a scale line (12) is engraved. The scale line (12) extends along the bottom edge of the support (1) in the height direction and is opened at the top edge.

10. A device for dual control of negative moment reinforcement protective layer and floor slab thickness according to any one of claims 1 to 9, characterized in that: It also includes at least one reinforcing limiter (3) for working in conjunction therewith, the reinforcing limiter (3) being arranged on any one side or multiple sides of the support (1); one end of the reinforcing limiter (3) being connected to the upper layer negative bending moment steel bars (4), and the other end being connected to the lower layer negative bending moment steel bars (5).

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