CN210288113U - Combined flat anchor backing plate - Google Patents

Abstract

The utility model provides a modular flat anchor backing plate, is the assembly that comprises flat cast iron backing plate and flat horn pipe intercombination, flat cast iron backing plate is a whole with flat horn pipe through the inseparable combination of bayonet lock connected mode, bayonet lock connected mode include by flat cast iron backing plate top drill way inner chamber wall or on the outer wall of its top drill way triangle-shaped or other forms's boss or recess and flat horn pipe bottom drill way inner chamber wall triangle-shaped or other forms's dogtooth or the waist shape hole lock connection of seting up on its bottom wall in order to realize being connected with the lock of flat cast iron backing plate. The flat horn tube is made of non-metal materials such as plastic materials, nylon, glass fiber reinforced plastics and the like; the outer surface of the flat flared tube is a smooth plane, or is provided with combined reinforcing ribs in the axial direction, the annular direction or both the axial direction and the annular direction. The combined flat anchor backing plate greatly reduces the manufacturing cost and the probability of shearing the steel strand in the tensioning process.

Description

Combined flat anchor backing plate

Technical Field

The utility model relates to an anchorage device accessory, especially a flat anchor backing plate.

Background

The flat anchor backing plate is widely applied to prestressed projects such as railway bridges, highway bridges, U-shaped aqueducts, special buildings and the like; the traditional anchor backing plate is integrally cast and molded by taking gray cast iron as a raw material (shown in figures 18-1-18-3), and the length of the anchor backing plate is usually designed according to a 4-degree steel strand break angle; however, in recent years, with increasingly severe market competition of anchors, in order to control product cost, many manufacturers continuously reduce product manufacturing cost at the cost of sacrificing product quality, reduce production materials of products, and design the length of the flat anchor backing plate to be shorter and shorter, thereby bringing huge potential safety hazards to the prestress engineering, and the anchor has the following two main points: (1) the bending angle of the steel strand is more than 4 degrees, so that the steel strand is sheared due to overlarge shearing stress in the tensioning process; (2) the break angle of the steel strand is larger than 4 degrees, so that the radial component force of the steel strand is increased, and the friction loss of the anchor mouth is increased.

Disclosure of Invention

The utility model aims to provide a: the utility model provides a modular flat anchor backing plate, this modular flat anchor backing plate is through improving product structure, changing the flat anchor backing plate of integral type into integrated configuration, and the performance of full play material reaches following purpose under the prerequisite that guarantees that flat anchor backing plate performance does not reduce: (1) the product cost is reduced; (2) the probability of shearing the prestressed tendons in the tensioning process is reduced; (3) the friction loss of the anchor mouth is reduced; (4) the fatigue resistance of the flat post-tensioned prestressed anchorage device assembly is improved; to solve the above problems of the prior art.

The technical scheme for solving the problems is as follows: the utility model provides a modular flat anchor backing plate which characterized in that: this flat anchor backing plate of combination formula is the assembly that comprises flat cast iron backing plate and flat horn pipe intercombination, and flat cast iron backing plate is a whole with flat horn pipe through bayonet lock connected mode inseparable combination, bayonet lock connected mode include by on the flat cast iron backing plate top drill way inner chamber wall or on its top drill way outer wall triangle-shaped, square or rectangular boss or recess and flat horn pipe bottom drill way inner chamber wall triangle-shaped's on the wall protruding hook or the waist shape hole lock connection of seting up on its bottom wall in order to realize being connected with the lock of flat cast iron backing plate.

The further technical scheme of the combined flat anchor backing plate is as follows: the combined flat anchor backing plate is a combined flat anchor backing plate I a or a combined flat anchor backing plate I b, the combined flat anchor backing plate I a or the combined flat anchor backing plate I b is a combined body formed by mutually combining a flat cast iron backing plate I a or a flat cast iron backing plate I b and a flat horn tube I, a triangular boss I, a square or a rectangular boss I is arranged on the outer wall surface of a top port of the flat cast iron backing plate I a, a groove I is arranged on the outer wall surface of a top port of the flat cast iron backing plate I b, a triangular convex hook I is arranged on the inner wall surface of a bottom port of the flat horn tube I, the flat cast iron backing plate I a is tightly combined into the combined flat anchor backing plate I a or the combined flat anchor backing plate I b through a buckling connection mode of the triangular convex hook I, the square or the rectangular boss I on the outer wall surface of the top port and the triangular convex hook I on the inner wall surface of the bottom port of the flat horn tube I Backing plate Ib.

The further technical scheme of the combined flat anchor backing plate is as follows: the combined flat anchor backing plate is a combined flat anchor backing plate II which is a combined body formed by combining a flat cast iron backing plate I a and a flat horn tube II, and a triangular, square or rectangular boss I is arranged on the outer wall surface of the orifice at the top end of the flat cast iron backing plate I a;

there is waist shape hole on II rear end drill way walls of flat horn tube, during the installation, after the top drill way of flat cast iron backing plate I a and flat horn tube rear end drill way counterpoint on same axis, through radial pressure flat horn tube II impressed in flat cast iron backing plate front end drill way, flat cast iron backing plate I a and flat horn tube II through with triangle-shaped on the top drill way outer wall, the lock connected mode inseparable combination in the waist shape hole on II rear end drill way walls of flat horn tube of square or rectangular cross section boss embedding into is a combination formula flat anchor backing plate II.

The further technical scheme of the combined flat anchor backing plate is as follows: the combined flat anchor backing plate is a combined flat anchor backing plate IIIa or a combined flat anchor backing plate IIIb, and the combined flat anchor backing plate IIIa or the combined flat anchor backing plate IIIb is a combined body formed by mutually combining a flat cast iron backing plate IIa or a flat cast iron backing plate IIb and a flat horn tube III;

the combined flat anchor backing plate III a or the combined flat anchor backing plate III b is formed by closely combining a mode that the flat cast iron backing plate II a is connected with the triangular convex hook II on the outer cavity wall surface of the bottom orifice of the flat horn tube III in a buckling manner through the triangular boss II on the inner cavity wall surface of the top orifice and the triangular convex hook II on the outer cavity wall surface of the bottom orifice of the flat horn tube III and a mode that the flat cast iron backing plate II b is connected with the triangular convex hook II on the outer cavity wall surface of the bottom orifice of the flat horn tube III in a buckling manner through the triangular boss II on the inner cavity wall surface of the top orifice and the triangular convex hook II on the outer cavity wall surface of the bottom orifice of the flat horn tube III.

The further technical scheme of the combined flat anchor backing plate is as follows: the outer surfaces of the flat flared tube I, the flat flared tube II or the flat flared tube III are smooth planes, or are provided with axial reinforcing ribs or annular reinforcing ribs or combined reinforcing ribs in the axial direction and the annular direction.

The further technical scheme of the combined flat anchor backing plate is as follows: the flat flared tube I, the flat flared tube II or the flat flared tube III are flat flared tubes made of plastic materials, nylon or glass fiber reinforced plastics.

By adopting the structure, the utility model discloses a "a modular flat anchor backing plate" has following beneficial effect:

1. raw materials are saved, and the manufacturing cost is greatly reduced: the original integrated casting structure is optimized to be a combined structure that the main body part is a cast iron base plate, and the auxiliary body part is a plastic or other non-metal flat horn-shaped tube, so that the using amount of steel materials is reduced by 30%, the processing cost is reduced by 5% -10%, and the manufacturing cost is greatly reduced.

2. The length of the flat anchor backing plate is lengthened, so that the break angle of the steel strand is controlled within 3 degrees, and the probability that the steel strand is sheared in the tensioning process is reduced.

3. The length of the flat anchor backing plate is lengthened, so that the break angle of the steel strand is controlled within 3 degrees, and the friction loss of an anchor port in the tensioning process is reduced.

4. The length of the flat anchor backing plate is lengthened, so that the break angle of the steel strand is controlled within 3 degrees, and the fatigue resistance of the flat prestressed anchoring system is improved.

The technical features of the "a combined flat anchor backing plate" of the present invention will be further described with reference to the accompanying drawings and examples.

Drawings

Fig. 1-1 to fig. 1-6 are schematic diagrams of the overall structure of a "combined flat anchor backing board ia" according to an embodiment of the present invention:

FIG. 1-1: front view, fig. 1-2: left side view, FIGS. 1-3: the cross-sectional view a-a of figure 1-1,

FIGS. 1 to 4: enlarged view of part B of fig. 1-3, fig. 1-5: the enlarged view of section C of figures 1-3,

FIGS. 1 to 6: a perspective view;

fig. 2-1 to fig. 2-4 are schematic diagrams of the overall structure of a "combined flat anchor backing plate ib" according to an embodiment of the present invention:

FIG. 2-1: front view, fig. 2-2: left view, fig. 2-3: the cross-sectional view D-D of figure 2-1,

FIGS. 2 to 4: the enlarged view of section E of figures 2-3,

FIGS. 2-5 to 2-8: is the structure schematic diagram of the flat cast iron backing plate Ib of the first embodiment of the utility model discloses a "a modular flat anchor backing plate Ib":

FIGS. 2 to 5: front view, fig. 2-6: left view, fig. 2-7: the cross-sectional views F-F of figures 2-5,

FIGS. 2 to 8: enlarged view of portion G of FIGS. 2-7;

FIGS. 3-1 to 3-4 are schematic structural views of a flat cast iron backing plate Ia of "a combined flat anchor backing plate Ia" according to the first embodiment and "a combined flat anchor backing plate II" according to the second embodiment of the present invention;

FIG. 3-1: front sectional view, fig. 3-2: the left side view of figure 3-1,

FIGS. 3-3: fig. 3-1, fig. 3-4: FIG. 3-3, enlarged view of section I;

fig. 4-1 to 4-5 are one of the schematic structural diagrams of the flat flared tube i in "a combined flat anchor backing plate ia" and "a combined flat anchor backing plate ib" according to the embodiment of the present invention:

FIG. 4-1: front sectional view, fig. 4-2: the left side view of figure 4-1,

FIGS. 4-3: J-J section view of FIG. 4-1, FIG. 4-4: the enlarged view of section K of figure 4-1,

FIGS. 4 to 5: a perspective view;

fig. 5-1 to 5-5 are two schematic structural diagrams of the flat flared tube i in "a combined flat anchor backing plate ia" and "a combined flat anchor backing plate ib" according to the first embodiment of the present invention:

FIG. 5-1: front sectional view, fig. 5-2: the left side view of figure 5-1,

FIGS. 5 to 3: L-L cross-sectional view of FIG. 5-1, FIG. 5-4: the enlarged view of section M of figure 5-1,

FIGS. 5 to 5: a perspective view;

fig. 6-1 to fig. 6-5 are third schematic structural views of a flat flared tube i in "a combined flat anchor backing plate ia" and "a combined flat anchor backing plate ib" according to an embodiment of the present invention:

FIG. 6-1: front sectional view, fig. 6-2: the left side view of figure 6-1,

FIGS. 6-3: fig. 6-1, fig. 6-4: the enlarged view of the portion O in figure 6-1,

FIGS. 6 to 5: a perspective view;

fig. 7-1 to 7-5 are four schematic structural diagrams of a flat flared tube i in "a combined flat anchor backing plate ia" and "a combined flat anchor backing plate ib" according to an embodiment of the present invention:

FIG. 7-1: front sectional view, fig. 7-2: the left side view of figure 7-1,

FIGS. 7-3: cross-sectional view P-P of fig. 7-1, fig. 7-4: the enlarged view of section Q of figure 7-1,

FIGS. 7 to 5: a perspective view;

fig. 8-1 to 8-6 are schematic diagrams of the overall structure of "a combined flat anchor backing plate ii" according to the second embodiment of the present invention:

FIG. 8-1: front view, fig. 8-2: left view, fig. 8-3: the cross-sectional view R-R of FIG. 8-1,

FIGS. 8 to 4: enlarged view of portion S of fig. 8-3, fig. 8-5: the enlarged view of portion T of figures 8-3,

FIGS. 8 to 6: a perspective view;

fig. 9-1 to 9-4 are schematic structural views of a flat flared tube ii of "a combined flat anchor backing plate ii" according to the second embodiment of the present invention:

FIG. 9-1: front sectional view, fig. 9-2: the left side view of figure 9-1,

FIGS. 9-3: U-U cross-sectional view of FIG. 9-1, FIG. 9-4: a perspective view;

fig. 10-1 to 10-4 are second schematic structural views of a flat flared tube ii of "a combined flat anchor backing plate ii" according to the second embodiment of the present invention:

FIG. 10-1: front sectional view, fig. 10-2: the left side view of figure 10-1,

FIGS. 10-3: V-V cross-sectional view of fig. 10-1, fig. 10-4: a perspective view;

fig. 11-1 to 11-4 are three schematic structural diagrams of a flat flared tube ii of "a combined flat anchor backing plate ii" according to the second embodiment of the present invention:

FIG. 11-1: front sectional view, fig. 11-2: the left side view of figure 11-1,

FIGS. 11-3: FIG. 11-1, sectional view W-W, FIG. 11-4: a perspective view;

fig. 12-1 to 12-4 are four schematic structural diagrams of a flat flared tube ii in "a combined flat anchor backing plate" according to the second embodiment of the present invention:

FIG. 12-1: front sectional view, fig. 12-2: the left side view of figure 12-1,

FIGS. 12-3: cross-sectional view X-X of fig. 12-1, fig. 12-4: a perspective view;

FIGS. 13-1 to 13-2 are schematic views of the overall structure of a "combined flat anchor backing plate IIIa" according to the third embodiment of the present invention;

FIG. 13-1: front sectional view, fig. 13-2: enlarged view of section Y of FIG. 13-1;

FIGS. 14-1 to 14-3 are schematic structural views of a flat cast iron backing plate IIa of a combined flat anchor backing plate IIIa according to a third embodiment of the present invention;

FIG. 14-1: front half section, fig. 14-2: the cross-sectional view Z-Z of figure 14-1,

FIG. 14-3 is an enlarged view of section α of FIG. 14-2;

FIGS. 15-1 to 15-2 are schematic views showing the overall structure of a "combined flat anchor backing plate IIIb" according to a third embodiment of the present invention;

FIG. 15-1 is a front cross-sectional view, and FIG. 15-2 is an enlarged view of portion β of FIG. 15-1;

FIGS. 16-1 to 16-3 are schematic structural views of a flat cast iron backing plate IIb of a combined flat anchor backing plate IIIb according to a third embodiment of the present invention;

FIG. 16-1: front half-section view, fig. 16-2: the gamma-gamma cross-sectional view of figure 16-1,

FIGS. 16-3: enlarged view of section δ of fig. 16-2;

fig. 17-1 to 17-4 are schematic structural views of a flat flare tube iii of "combined flat anchor backing plate iiia and" combined flat anchor backing plate iiib "according to a third embodiment of the present invention:

FIG. 17-1: front half-section view, fig. 17-2: the left side view of figure 17-1,

FIGS. 17 to 3: top view of fig. 17-1, fig. 17-4: FIG. 17-1 is an enlarged view of the epsilon part;

fig. 18-1 to 18-3 show a flat anchor pad which is currently used:

FIG. 18-1: front sectional view, fig. 18-2: the left side view of figure 18-1,

FIGS. 18 to 3: zeta-zeta of FIG. 18-1 is a cross-sectional view.

In the figure:

11-flat cast iron backing plates Ia, 12-flat cast iron backing plates Ib, 13-flat cast iron backing plates IIa, 14-flat cast iron backing plates IIb;

101-boss I, 102-groove I, 103-boss II, 104-groove II;

21. 22, 23, 24-flat flared tubes I, 25, 26, 27, 28-flat flared tubes II,

29-flat flare tube III;

201-convex hook I, 202-installation seam allowance, 203-axial reinforcing rib, 204-circumferential reinforcing rib, 205-combined reinforcing rib, 206-waist-shaped hole and 207-convex hook II;

3-grouting pipes; 4-flat anchor backing plate.

Detailed Description

A combined flat anchor backing plate is a combined body formed by mutually combining a flat cast iron backing plate and a flat flared tube, wherein a main body part is a part for bearing load and is a flat cast iron backing plate formed by casting cast iron; the auxiliary body part is a non-bearing part, is a flat horn tube which is formed by injection molding of HDPE material with relatively low price and mainly plays a role of connecting a transition corrugated tube; the flat cast iron backing plate and the flat flared tube are tightly combined into a whole in a bayonet buckling connection mode, and the bayonet buckling connection mode comprises the step that a triangular or other-form boss or groove on the inner cavity wall surface of the orifice at the top end of the flat cast iron backing plate or on the outer wall surface of the orifice at the top end of the flat cast iron backing plate is buckled and connected with a triangular or other-form convex hook on the inner cavity wall surface of the orifice at the bottom end of the flat flared tube or a waist-shaped hole formed on the wall surface at the bottom of the flat flared tube so as to realize buckling connection with the flat cast iron backing;

there are different embodiments according to the bayonet fastening connection method, and several typical embodiments of the bayonet fastening connection method are described below.

The first embodiment is as follows:

a combined flat anchor backing plate I comprises a combined flat anchor backing plate Ia and a combined flat anchor backing plate Ib;

as shown in figures 1-6, the combined flat anchor backing plate Ia is a combined body formed by mutually combining a flat cast iron backing plate Ia and a flat trumpet tube I21/22/23/24, a triangular or other boss I101 (see figures 3-1-3-4) is arranged on the outer wall surface of the orifice at the top end of the flat cast iron backing plate Ia, and the flat trumpet tube I21/22/23/24The wall surface of the inner cavity of the bottom end orifice is provided with a triangular or other convex hook I201 (see figures 4-4, 5-4, 6-4 and 7-4), and the flat cast iron backing plate Ia passes through the triangular or other convex platform I101 on the outer wall surface of the top end orifice and the flat horn tube I21/22/23/24The triangular or other convex hooks I201 on the wall surface of the inner cavity of the bottom orifice are tightly combined into a combined flat anchor backing board Ia in a buckling connection mode (see figures 1-6).

The embodiment of the utility model provides a another form is combination formula flat anchor backing plate Ib, combination formula flat anchor backing plate Ib's flat cast iron backing plate is flat cast iron backing plate Ib, has a recess I102 on this flat cast iron backing plate Ib's the top drill way outer wall (refer to fig. 2-5 ~ 2-8), and flat cast iron backing plate Ib closely combines into a combination formula flat anchor backing plate Ib (refer to fig. 2-1 ~ 2-4) through recess I102 on its top drill way outer wall (refer to fig. 2-8) and the I201 lock connected mode of the protruding hook of triangle-shaped or other forms on the flat horn tube base end drill way inner wall face.

In this embodiment, the outer surface of the flat flared tube i may be a smooth plane (see fig. 4-1 to 4-5), or may be a combined reinforcing rib 205 (see fig. 7-1 to 7-5) with an axial reinforcing rib 203 (see fig. 5-1 to 5-5), or with a circumferential reinforcing rib 204 (see fig. 6-1 to 6-5), or both axial and circumferential directions, to reinforce the flat flared tube i.

As a variation of the embodiment of the present invention, the triangular boss on the outer wall surface of the top orifice of the flat cast iron shim plate Ia can be changed into other forms of bosses, such as a square or rectangular boss.

Example two:

a combined flat anchor backing plate II:

as shown in figures 8-1 to 8-6, the combined flat anchor backing plate II consists of a flat cast iron backing plate Ia and a flat flared tube II 25/26/27/28The combined body is formed by combining the flat cast iron base plate Ia, a triangular or other boss I101 is arranged on the outer wall surface of the top end orifice of the flat cast iron base plate Ia, (see fig. 3-1 and fig. 3-4), a waist-shaped hole 206 is arranged on the wall surface of the rear end orifice of the flat flared tube II 25/26/27/28, and a corrugated tube installation spigot 202 with the length of 20 mm-30 mm is designed at the front end of the flat flared tube II 25/26/27/28; during installation, after the top end orifice of the flat cast iron backing plate Ia and the rear end orifice of the flat flared tube are aligned on the same axis, the flat flared tube II 25/26/27/28 is pressed into the front end orifice of the flat cast iron backing plate through radial pressure, and the flat cast iron backing plate Ia and the flat flared tube II 25 pass through the hole to be alignedThe buckling connection mode that the triangular section boss on the outer wall of the top port is embedded into the waist-shaped hole 206 on the wall surface of the rear port of the flat flared tube 25/26/27/28 is tightly combined into a combined flat anchor backing plate II.

In this embodiment, the outer surface of the flat flared tube ii may be a smooth plane (see fig. 9-1 to 9-4), or may be reinforced by an axial reinforcing rib 203 (see fig. 10-1 to 10-4), a circumferential reinforcing rib 204 (see fig. 11-1 to 11-4), or a combined reinforcing rib 205 (see fig. 12-1 to 12-4) having both axial and circumferential directions.

As a variation of the second embodiment of the present invention, the triangular boss on the outer wall surface of the top orifice of the flat cast iron shim plate Ia can be changed into other forms of bosses, such as square or rectangle.

Example three:

the utility model provides a modular flat anchor backing plate III, this modular flat anchor backing plate III includes modular flat anchor backing plate IIIa and modular flat anchor backing plate IIIb:

as shown in fig. 13-1 to 13-2, the combined flat anchor backing plate iiia is a combined body formed by combining a flat cast iron backing plate iia and a flat flared tube iii 29;

the flat cast iron backing plate IIa is tightly combined into a combined flat anchor backing plate IIIa in a mode that the triangular or other-form convex hooks II 207 on the outer cavity wall surface of the bottom end orifice of the flat flared tube III are buckled and connected through the triangular or other-form convex hooks II 103 on the inner cavity wall surface of the top end orifice of the flat cast iron backing plate IIa (see figures 14-1-14-3), and the triangular or other-form convex hooks II 207 on the outer cavity wall surface of the bottom end orifice of the flat flared tube III (see figures 17-1-17-4).

As shown in fig. 15-1 to 15-2, the combined flat anchor backing plate iiib is a combined body formed by combining a flat cast iron backing plate iib and a flat flare tube iii 29;

the inner cavity wall surface of the top end orifice of the flat cast iron backing plate IIb is provided with a groove II 104 (see the figure 16-1-16-3), and the flat cast iron backing plate IIb is tightly combined into a combined flat anchor backing plate IIIb through a mode that the groove II 104 on the inner cavity wall surface of the top end orifice is buckled and connected with a triangular or other convex hook II 207 on the outer cavity wall surface of the bottom end orifice of the flat flared tube III.

In this embodiment, the outer surface of the flat flared tube iii 29 is either a smooth plane (see fig. 17-1 to 17-4), or has an axial rib 203 or a circumferential rib 204 or has a combined rib 205 in both axial and circumferential directions (the outer surface of the flat flared tube iii 29 in the last 3 kinds is the same as the outer surface of the flat flared tube i, and is not shown here).

The utility model discloses in each embodiment, flat horn tube I, flat horn tube II or flat horn tube III except can adopt the flat plastics horn tube that plastic materials made, can also be the flat horn tube of making by nylon, glass steel or PP type non-metallic material.

Claims (10)

1. The utility model provides a modular flat anchor backing plate which characterized in that: this flat anchor backing plate of combination formula is the assembly that comprises flat cast iron backing plate and flat horn pipe intercombination, and flat cast iron backing plate is a whole with flat horn pipe through bayonet lock connected mode inseparable combination, bayonet lock connected mode include by on the flat cast iron backing plate top drill way inner chamber wall or on its top drill way outer wall triangle-shaped, square or rectangular boss or recess and flat horn pipe bottom drill way inner chamber wall triangle-shaped's on the wall protruding hook or the waist shape hole lock connection of seting up on its bottom wall in order to realize being connected with the lock of flat cast iron backing plate.

2. A modular flat anchor pad according to claim 1, wherein: the combined flat anchor backing plate is a combined flat anchor backing plate Ia or a combined flat anchor backing plate Ib, the combined flat anchor backing plate Ia or the combined flat anchor backing plate Ib is a combined body formed by mutually combining a flat cast iron backing plate Ia or a flat cast iron backing plate Ib and a flat horn tube I, a triangular boss I (101), a square or a rectangular boss I (101) are arranged on the outer wall surface of a top port of the flat cast iron backing plate Ia, a groove I (102) is formed in the outer wall surface of the top port of the flat cast iron backing plate Ib, a triangular convex hook I (201) is arranged on the inner wall surface of the bottom port of the flat horn tube I, and the flat cast iron backing plate Ia is tightly combined into a combined body through the buckling connection modes of the triangular convex hook I (201) on the outer wall surface of the top port and the triangular convex hook I (101) on the outer wall surface of the top port of the flat cast iron backing plate Ib and the triangular convex hook I (201) on the inner wall surface of the bottom port of the flat horn tube I And the combined flat anchor backing plate Ia or the combined flat anchor backing plate Ib.

3. A modular flat anchor pad according to claim 1, wherein: the combined flat anchor backing plate is a combined flat anchor backing plate II which is a combined body formed by combining a flat cast iron backing plate I a and a flat horn tube II, and a triangular, square or rectangular boss I (101) is arranged on the outer wall surface of the orifice at the top end of the flat cast iron backing plate I a;

there is waist shape hole (206) on II rear end drill way walls of flat horn tube, during the installation, after the top drill way of flat cast iron backing plate Ia and flat horn tube rear end drill way counterpoint on same axis, through radial pressure flat horn tube II impressed in the flat cast iron backing plate front end drill way, the lock connected mode in the waist shape hole (206) of flat horn tube II rear end drill way wall is embedded into through triangle-shaped, square or the rectangle cross-section boss with on the top drill way outer wall to flat cast iron backing plate Ia and flat horn tube II closely combines to be a combination formula flat anchor backing plate II.

4. A modular flat anchor pad according to claim 1, wherein: the combined flat anchor backing plate is a combined flat anchor backing plate IIIa or a combined flat anchor backing plate IIIb, and the combined flat anchor backing plate IIIa or the combined flat anchor backing plate IIIb is a combined body formed by mutually combining a flat cast iron backing plate IIa or a flat cast iron backing plate IIb and a flat horn tube III (29);

the flat cast iron backing plate II a is tightly combined into a combined flat anchor backing plate III a or a combined flat anchor backing plate III b through a mode that the triangular boss II (103) on the top orifice inner cavity wall surface of the flat cast iron backing plate II a is connected with the triangular boss II (207) on the flat horn tube III (29) bottom orifice outer cavity wall surface, and the flat cast iron backing plate II b is tightly combined into the combined flat anchor backing plate III a or the combined flat anchor backing plate III b through a mode that the triangular boss II (103) on the top orifice inner cavity wall surface is connected with the triangular boss II (207) on the flat horn tube III bottom orifice outer cavity wall surface, and the triangular boss II (207) on the flat cast iron backing plate II b on the flat horn tube III bottom orifice outer cavity wall surface is connected with the triangular boss II (104) on the flat orifice inner cavity wall surface.

5. A modular flat anchor pad according to claim 2, wherein: the outer surface of the flat flared tube I is a smooth plane, or is provided with an axial reinforcing rib (203), or is provided with a circumferential reinforcing rib (204), or is provided with a combined reinforcing rib (205) in the axial direction and the circumferential direction at the same time.

6. A modular flat anchor pad according to claim 3, wherein: the outer surface of the flat flared tube II is a smooth plane, or is provided with an axial reinforcing rib (203), or is provided with a circumferential reinforcing rib (204), or is provided with a combined reinforcing rib (205) in the axial direction and the circumferential direction at the same time.

7. The modular flat anchor pad of claim 4, wherein: the outer surface of the flat flared tube III is a smooth plane, or is provided with an axial reinforcing rib (203), or is provided with a circumferential reinforcing rib (204), or is provided with a combined reinforcing rib (205) in the axial direction and the circumferential direction at the same time.

8. A modular flat anchor pad according to claim 2, wherein: the flat flared tube I is made of plastic materials, nylon or glass fiber reinforced plastics.

9. A modular flat anchor pad according to claim 3, wherein: the flat flared tube II is a flat flared tube made of plastic materials, nylon or glass fiber reinforced plastics.

10. The modular flat anchor pad of claim 4, wherein: the flat flared tube III is made of plastic materials, nylon or glass fiber reinforced plastics.

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