Special protective layer cushion block for column steel bar

Abstract

The utility model discloses a special protective layer cushion block for a column steel bar, which comprises a first cushion block body, a first binding wire and a wedge-shaped column, the first cushion block body (1) is a section of cylinder with a U-shaped opening (4), and the column steel bar (3) is axially clamped into the U-shaped opening along the first cushion block body; the wedge-shaped column (5) is inserted into the U-shaped opening in the axial direction of the U-shaped opening, and the first binding wires (2) on the two sides of the wedge-shaped column are forked on the two sides of the column steel bar and bound together with the column steel bar and the first cushion block body. According to the other embodiment of the utility model, a pair of same hollow semi-cylindrical second cushion block bodies (7) are symmetrically clamped on the two sides of the column reinforcing steel bar in the longitudinal direction, and the two second cushion block bodies and the column reinforcing steel bar are bound together through second binding wires (8) along second binding wire grooves (10) in the outer circumferential surfaces of the two second cushion block bodies. The connection between the cushion block and the column steel bar is firm, and the cushion block is not easy to slide.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforced concrete accessories for construction projects, in particular to a special protective layer pad for column reinforcement. Background Art

[0002] The correct setting of the steel bar protective layer pads in reinforced concrete structure columns is related to the bearing capacity, durability, fire resistance and other performances of the structure. If the protective layer pads of the column steel bars are not strong enough or are not firmly connected to the column steel bars, they are prone to deformation, loss or displacement during the pouring of structural concrete, which will cause the column steel bars to corrode and expand prematurely due to the lack of concrete protective layer, eventually leading to the destruction of the concrete structure, affecting the use function and structural safety.

[0003] At present, in construction, the thickness of the concrete protective layer is usually ensured by inserting round plastic pads on a row of column steel bars outside the reinforced concrete structure. Although the existing round plastic pads can ensure the thickness of the concrete protective layer to a certain extent, they have low strength and high cost. After being connected with the column steel bars, they are easy to deviate, slip and be damaged. They cannot ensure the thickness of the concrete protective layer of the column steel bars, have a narrow scope of application, and cannot be widely used.

[0004] The Chinese patent document with announcement number CN 204826428 U (application number CN2015205706887, announcement date December 2, 2015) discloses a new type of steel bar protective layer pad, including two semicircular mortar pads a and b, mortar pad a and mortar pad b are butt-jointed together to form a hollow round cake shape, pad a is provided with a connecting belt and a lock buckle, pad b is provided with a connecting belt and a buckle corresponding to the lock buckle, when in use, the steel bar is placed between the two semicircular pads and the buckle on pad b is snapped into the buckle in pad a to form a steel bar protective layer. This technology is difficult to manufacture, and the mortar material is not strong, the connection between the mortar and the steel bar is not firm, and it is easy to slip.

[0005] Therefore, how to provide a pad that is firmly connected and can ensure the thickness of the reinforced concrete protective layer of the column has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0006] In view of the defects in the prior art, the utility model provides a special protective layer pad for column steel bars, which has a simple installation process and high strength. After being connected to the column steel bars, it is not easy to deviate, slide or be damaged, and has a wide range of applications.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a special protective layer pad for column steel bars, including a first pad body, a first wire tie and a wedge-shaped column, the first pad body is a section of a cylinder with a U-shaped opening, the U-shaped opening is opened axially along the first pad body and penetrates the entire first pad body, its cross section is trapezoidal, the height of its trapezoidal cross section along the radial direction is equal to the sum of the cross-sectional radius of the first pad body and the cross-sectional radius of the column steel bar, the upper bottom of the short side of the trapezoidal cross section adjacent to the outer side of the first pad body is slightly larger than the diameter of the column steel bar, and the lower bottom of the long side adjacent to the central axis of the first pad body is 4mm-6mm longer than the upper bottom of the short side; the column steel bar is inserted into the U-shaped opening along the axial direction of the first pad body; the first pad body is opened on a side adjacent to the upper bottom of the U-shaped opening, and the cross-sectional depth and width are both 5m m, the first wire binding groove is opened axially along the first cushion block body and passes through the outer side surface of the entire first cushion block body; the wedge-shaped column is inserted into the U-shaped opening along the axial direction of the U-shaped opening, and its cross-section is trapezoidal, the trapezoidal cross-section of the wedge-shaped column is adapted to the cross-section of the outer side surface of the first cushion block body adjacent to the U-shaped opening, the upper base size of the cross-section is smaller than the upper base size of the cross-section of the U-shaped opening, the lower base size of the cross-section is larger than the upper base size of the cross-section of the U-shaped opening but smaller than the lower base size of the cross-section of the U-shaped opening, the trapezoidal height of the cross-section is not larger than the difference between the radius of the first cushion block body and the radius of the column steel bar, and the axial height of the wedge-shaped column is equal to the axial height of the first cushion block body; a first wire is arranged at the geometric center of the trapezoidal cross-section of the wedge-shaped column along the axis direction of the column, and the first wire extends from both ends of the wedge-shaped column by the same length.

[0008] Another embodiment of a special protective layer pad for column steel bars provided by the utility model comprises a second pad body and a second wire, wherein the second pad body is a pair of completely identical hollow semi-cylinders, and the radial wall thickness of the second pad body is equal to the thickness of the protective layer of the column steel bars; in the middle position of the outer side surface of the second pad body, a second wire binding groove is arranged along its transverse circumferential direction and extends through the entire outer circumferential surface, and the plane where the second wire binding groove is located is perpendicular to the central axis of the second pad body; a semicircular through groove is opened in the middle part of each second pad body along the axial direction of the column, and the cross-sectional size of the two through grooves merged together in the radial direction is adapted to the cross-sectional size of the column steel bars; a pair of the second pad bodies are symmetrically clamped on both sides of the column steel bars along the longitudinal direction, and the second wire is used to bind the two second pad bodies and the column steel bars together along the second wire binding grooves on the outer circumferential surfaces of the two second pad bodies.

[0009] Preferably, the length of the first tie wire at each end of the wedge-shaped column is not less than the sum of the diameter length of the cross-section of the first pad body and the axial height of the first pad body, and the first tie wire is forked at both sides of the column steel bars and tied together with the column steel bars and the first pad body.

[0010] Preferably, the two first tying wires at both ends of the wedge-shaped column are fixedly connected together in the first tying wire groove on the outer side of the first cushion block body.

[0011] Preferably, the depth and width of the second wire-binding groove are both 5 mm.

[0012] Preferably, the second tie wire and the second cushion block body are preformed.

[0013] Preferably, a plurality of anti-slip strips are arranged on the inner wall of the through groove along the circumferential direction and are parallel to the cross section of the second cushion block body and to each other.

[0014] Preferably, the first pad block body can be made of mortar material or plastic material.

[0015] Preferably, the second pad block body can be made of mortar material or plastic material.

[0016] The utility model has the following beneficial effects: 1. During installation, the utility model uses a column steel bar to be inserted into the pad, and is fixed with a wedge, and then fixed by a first binding wire. The installation process is simple, and the installation with the column steel bar is firm, safe and reliable; 2. Because the pad used in the utility model is tied together with the column steel bar of the concrete structure, no matter how it is rotated, it will not affect the thickness of the concrete protective layer of the column steel bar; 3. A plurality of mutually parallel anti-slip strips are arranged on the inner wall of the internal through groove of the pad block along the circumferential direction. When the pad block is tied together with the column steel bar, the friction between the pad block and the column steel bar is increased, which greatly improves the connection firmness between the pad block and the column steel bar, and avoids displacement and loss of the pad block after it is fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is a schematic diagram of the cross-sectional structure of the protective layer pad described in the first embodiment of the utility model installed on the column steel bars.

[0018] Figure 2 This is an enlarged view of the wedge-shaped column of the first pad body of the special protective layer for column steel bars described in the first embodiment of the utility model.

[0019] Figure 3 This is a structural schematic diagram of the protective layer pad described in the second embodiment of the utility model installed on the column steel bars.

[0020] Figure 4 This is a perspective view of the second pad body of the special protective layer for column reinforcement described in an embodiment of the utility model.

[0021] Figure numbers: 1-first pad body, 2-first binding wire, 3-column reinforcement, 4-U-shaped opening, 5-wedge-shaped column, 6-first binding wire groove, 7-second pad body, 8-second binding wire, 9-through groove, 10-second binding wire groove, 11-anti-slip strip. DETAILED DESCRIPTION

[0022] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the examples of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model should be understood according to the specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] Figure 1 and Figure 2The first embodiment of the special protective layer pad for column steel bars provided by the utility model comprises a first pad body 1, a first wire tie 2 and a wedge-shaped column 5. As can be seen from the figure, the first pad body 1 is a section of a cylinder with a U-shaped opening 4, and the U-shaped opening 4 is axially opened along the first pad body 1 and penetrates the entire first pad body 1, and its cross section is trapezoidal, and the height of its trapezoidal cross section along the radial direction is equal to the sum of the cross-sectional radius of the first pad body 1 and the cross-sectional radius of the column steel bar 3, and the upper bottom of the short side of the trapezoidal cross section adjacent to the outer side of the first pad body 1 is slightly larger than the diameter of the column steel bar 3, and the lower bottom of the long side adjacent to the central axis of the first pad body 1 is 4mm-6mm longer than the upper bottom of the short side; the column steel bar 3 is axially inserted into the U-shaped opening 4 along the first pad body 1; the first pad body 1 is opened on a side of the upper bottom of the U-shaped opening 4, and the cross-sectional depth and width are both 5 The first wire binding groove 6 of mm is axially opened along the first cushion block body 1 and penetrates the entire outer side surface of the first cushion block body 1; the wedge-shaped column 5 is inserted into the U-shaped opening 4 along the axial direction of the U-shaped opening 4, and its cross section is trapezoidal. The trapezoidal cross section of the wedge-shaped column 5 is adapted to the cross section of the outer side surface of the U-shaped opening 4 adjacent to the first cushion block body 1, the upper base size of the cross section is smaller than the upper base size of the cross section of the U-shaped opening 4, the lower base size of the cross section is larger than the upper base size of the cross section of the U-shaped opening 4 but smaller than the lower base size of the cross section of the U-shaped opening 4, the trapezoidal height of the cross section is not larger than the difference between the radius of the first cushion block body 1 and the radius of the column reinforcement 3, and the axial height of the wedge-shaped column 5 is equal to the axial height of the first cushion block body 1; a first wire 2 is arranged at the geometric center of the trapezoidal cross section of the wedge-shaped column 5 along the axis direction of the column, and the first wire 2 extends from both ends of the wedge-shaped column 5 by the same length.

[0027] like Figure 1 As shown, the length of the first tie wire 2 at each end of the wedge-shaped column 5 is not less than the sum of the diameter length of the cross section of the first cushion block body 1 and the axial height of the first cushion block body 1. The first tie wire 2 is bifurcated at both sides of the column reinforcement 3 and is tied together with the column reinforcement 3 and the first cushion block body 1. The two first tie wires 2 at both ends of the wedge-shaped column 5 are fixedly connected together in the first tie wire groove 6 on the outer side of the first cushion block body 1.

[0028] The first cushion block body 1 can be made of mortar material or plastic material.

[0029] Figure 3 and Figure 4Another embodiment of a special protective layer pad for column steel bars 3 provided by the utility model includes a second pad body and a second wire, wherein the second pad body 7 is a pair of completely identical hollow semi-cylinders, and the radial wall thickness of the second pad body 7 is equal to the protective layer thickness of the column steel bars 3; in the middle position of the outer side surface of the second pad body 7, a second wire binding groove 10 is arranged along its transverse circumferential direction and extends through the entire outer circumferential surface, and the plane where the second wire binding groove 10 is located is perpendicular to the central axis of the second pad body 7; a semicircular through groove 9 is opened in the middle part of each second pad body 7 along the axial direction of the column, and the cross-sectional size of the two through grooves 9 merged together in the radial direction is adapted to the cross-sectional size of the column steel bars 3; a pair of second pad bodies 7 are symmetrically clamped on both sides of the column steel bars 3 along the longitudinal direction, and the second wire 8 is used to tie the two second pad bodies 7 and the column steel bars 3 together along the second wire binding grooves 10 on the outer circumferential surfaces of the two second pad bodies 7.

[0030] from Figure 4 It can be seen that the depth and width of the second wire binding groove 10 are both 5 mm.

[0031] like Figure 1 As shown, the second binding wire 8 and the second cushion block body 7 are preformed.

[0032] like Figure 2 As shown, a plurality of anti-slip strips 11 are arranged on the inner wall of the through groove 9 along the circumferential direction and are parallel to the cross section of the second cushion block body 7 and to each other.

[0033] The second cushion block body 7 can be made of mortar material or plastic material.

[0034] During specific use, a section of cylinder with a U-shaped opening 4 is used, and the column steel bar 3 is axially inserted into the U-shaped opening 4 along the first pad body 1; the wedge-shaped column 5 is inserted into the U-shaped opening 4 along the axial direction of the U-shaped opening 4 and tightened, and the first ties extending from both sides of the wedge-shaped column 5 are forked at both sides of the column steel bar 3 and tied together with the column steel bar 3 and the first pad body 1.

[0035] In another embodiment, a pair of identical semi-cylindrical second pad block bodies 7 with cross-sectional dimensions of through grooves 9 matching the diameter of column reinforcement 3 are selected, and the pair of second pad block bodies 7 are clamped symmetrically on both sides of column reinforcement 3 along the longitudinal direction, and the two second pad block bodies 7 are tied together with column reinforcement 3 by second binding wires along the second binding wire grooves 10 on the outer circumferential surfaces of the two second pad block bodies 7, so as to ensure that the column reinforcement 3 does not move, fall, or get damaged during the concrete vibration process, thereby ensuring the thickness of the concrete protective layer of the column reinforcement 3. Since the structural dimensions of the body are consistent with the requirements of relevant specifications, the distance between the column reinforcement 3 and the wall, slab, and beam formwork can be effectively guaranteed.

[0036] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A special protective layer pad for column reinforcement, comprising a first pad body, a first binding wire and a wedge-shaped column, characterized in that: The first pad body (1) is a section of a cylinder with a U-shaped opening (4). The U-shaped opening (4) is opened axially along the first pad body (1) and penetrates the entire first pad body (1). Its cross section is trapezoidal. The height of the trapezoidal cross section along the radial direction is equal to the sum of the cross-sectional radius of the first pad body (1) and the cross-sectional radius of the column steel bar (3). The upper bottom of the short side of the trapezoidal cross section adjacent to the outer side of the first pad body (1) is slightly larger than the diameter of the column steel bar (3). The lower bottom of the long side adjacent to the central axis of the first pad body (1) is 4 mm to 6 mm longer than the upper bottom of the short side. The column steel bar (3) is inserted into the U-shaped opening (4) axially along the first pad body (1). A first wire tying groove (6) with a cross-sectional depth and width of 5 mm is opened on one side of the upper bottom of the U-shaped opening (4). The first wire tying groove (6) is axially extending along the first pad body (1). The outer side surface of the entire first cushion block body (1) is opened and penetrated; the wedge-shaped column (5) is inserted into the U-shaped opening (4) along the axial direction of the U-shaped opening (4), and its cross section is a trapezoid. The trapezoidal cross section of the wedge-shaped column (5) is adapted to the cross section of the outer side surface of the U-shaped opening (4) adjacent to the first cushion block body (1), the upper base size of the cross section is smaller than the upper base size of the cross section of the U-shaped opening (4), the lower base size of the cross section is larger than the upper base size of the cross section of the U-shaped opening (4) but smaller than the lower base size of the cross section of the U-shaped opening (4), the trapezoidal height of the cross section is not greater than the difference between the radius of the first cushion block body (1) and the radius of the column steel bar (3), and the axial height of the wedge-shaped column (5) is equal to the axial height of the first cushion block body (1); a first tie wire (2) is arranged at the geometric center of the trapezoidal cross section of the wedge-shaped column (5) along the column axis direction, and the first tie wire (2) extends from both ends of the wedge-shaped column (5) by the same length.

2. The column reinforcement special protective layer pad according to claim 1 is characterized in that: The protruding length of the first tie wire (2) at each end of the wedge-shaped column (5) is not less than the sum of the diameter length of the cross section of the first cushion block body (1) and the axial height of the first cushion block body (1); the first tie wire (2) is bifurcated at both sides of the column steel bar (3) and is tied together with the column steel bar (3) and the first cushion block body (1).

3. The column reinforcement special protective layer pad according to claim 1 or 2, characterized in that: Two first tying wires (2) at both ends of the wedge-shaped column (5) are fixedly connected together in a first tying wire groove (6) on the outer side surface of the first cushion block body (1).

4. The column reinforcement special protective layer pad according to claim 1 is characterized in that: The first cushion block body (1) may be made of mortar material or plastic material.

5. A protective layer pad for column reinforcement, comprising a second pad body and a second binding wire, characterized in that: The second pad body (7) is a pair of identical hollow semi-cylinders, and the wall thickness of the second pad body (7) along its radial direction is equal to the thickness of the protective layer of the column steel bar (3); a second wire binding groove (10) is provided in the middle of the outer side surface of the second pad body (7) along its transverse circumferential direction and extends through the entire outer circumferential surface, and the plane where the second wire binding groove (10) is located is perpendicular to the central axis of the second pad body (7); a semicircular through groove (9) is provided in the middle of each second pad body (7) along the axial direction of the column, and the cross-sectional size of the two through grooves (9) combined in the radial direction is compatible with the cross-sectional size of the column steel bar (3); a pair of the second pad bodies (7) are symmetrically clamped on both sides of the column steel bar (3) along the longitudinal direction, and the second wire (8) is used to bind the two second pad bodies (7) and the column steel bar (3) together along the second wire binding groove (10) on the outer circumferential surface of the two second pad bodies (7).

6. The column reinforcement special protective layer pad according to claim 5 is characterized in that: The depth and width of the second wire-binding groove (10) are both 5 mm.

7. The column reinforcement special protective layer pad according to claim 5 is characterized in that: The second binding wire (8) and the second cushion block body (7) are preformed.

8. The column reinforcement special protective layer pad according to claim 5 is characterized in that: A plurality of anti-slip strips (11) are arranged along the circumferential direction on the inner wall of the through groove (9) and are parallel to the cross section of the second cushion block body (7) and to each other.

9. The column reinforcement special protective layer pad according to claim 5 is characterized in that: The second cushion block body (7) may be made of mortar material or plastic material.

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