Small flat plate leveling square hammer

Abstract

The utility model discloses a small flat plate leveling square hammer which comprises a bottom stress hammer, the bottom face of the bottom stress hammer is square, the whole bottom stress hammer is in a square column shape, and four rammer lug plates are symmetrically arranged on the upper surface of the bottom stress hammer in a square shape. The balance hanging plate is fixedly connected with the rammer lug plate through a steel wire rope, and a balance hanging ring is arranged at the top of the balance hanging plate; the steel plate weight stack is arranged at the top of the bottom stress hammer, a reinforcing top cover is arranged at the bottom of the steel plate weight stack, and the axis connecting piece penetrates through the reinforcing top cover and the steel plate weight stack from top to bottom and extends to the center position of a hammer body in the bottom stress hammer; and the reinforcing top cover, the steel plate weight stack and the bottom stress hammer are connected into a whole through a plurality of connecting bolts. Compared with a traditional rammer, the rammer has the advantages that ramming blind areas can be greatly reduced, positioning is easy and fast, uneven upwelling or upheaval of a construction face is avoided, use is more stable, the ramming capacity can be transmitted more evenly, and the integral forming effect of the construction face is good.

Description

Technical Field

[0001] This utility model relates to the technical field of dynamic compaction construction equipment, specifically to a small flat-plate leveling square hammer. Background Technology

[0002] Dynamic compaction for foundation replacement has advantages such as fast processing speed, low cost, and wide impact range. However, dynamic compaction also has its shortcomings. For example, when the foundation soil is highly sensitive silty clay with high water content, the traditional full-load tamping hammer cannot fully meet the construction requirements.

[0003] The applicant's earlier application CN114808914A discloses a special-shaped guide hammer for dynamic compaction, including a foundation hammer and a guide hammer. The foundation hammer is convex in shape, with a cylindrical hammer body at the bottom. A vertically extending hammer neck is integrally provided at the center of the top of the hammer body, and several vertically penetrating vent holes are arranged in a circular array on the outside of the hammer body. The hammer neck is cylindrical, and its axis is collinear with the axis of the hammer body. A mushroom-head lifting screw is threadedly connected to the center of the top of the hammer neck and is coaxial with it. The bottom end of the mushroom-head lifting screw penetrates the hammer neck and extends to a certain depth inside the hammer body. The guide hammer is cylindrical, and its top end is fixedly connected to the center of the bottom of the foundation hammer body. Its axis is collinear with the axis of the hammer body, and its cross-sectional dimension is smaller than the cross-sectional dimension of the hammer body but larger than the cross-sectional dimension of the hammer neck.

[0004] The applicant's earlier application CN116575431A discloses a dynamic compaction hammer and its manufacturing method, including a hammer body, a central connecting rod, and multiple counterweights. One side of the central connecting rod is connected to the center of the top surface of the hammer body. Each counterweight has a through hole in its center, allowing it to be fitted onto the central connecting rod. The counterweight closest to the hammer body is flush with the top surface of the hammer body, and its size is smaller than the bottom surface of the hammer body. This patented dynamic compaction hammer allows for easy adjustment of the hammer weight according to actual needs, enabling weight conversion and better meeting construction requirements, thus ensuring the quality of dynamic compaction work.

[0005] Most existing full-scale tamping hammers are cylindrical with a small circular base area, and the tamping points can only be tangent to each other. This creates blind spots on the construction surface, which leads to deformation of the site under stress (such as surging and bulging), resulting in poor construction and shaping effects. They usually require secondary leveling by manpower and machinery, which is time-consuming and labor-intensive. Utility Model Content

[0006] The purpose of this invention is to provide a small flat square hammer to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides a small flat-plate leveling square hammer, comprising: a bottom load-bearing hammer, the bottom surface of which is square and the whole is in the shape of a square column, and four hammer ear plates are symmetrically arranged on the upper surface of the bottom load-bearing hammer in a square shape; a balance plate, which is fixedly connected to the hammer ear plates by steel wire ropes, and a balance ring is provided on the top of the balance plate; a steel plate counterweight plate, which is set on the top of the bottom load-bearing hammer, and a reinforced top cover is provided at the bottom of the steel plate counterweight plate; a shaft connecting piece passes through the reinforced top cover and the steel plate counterweight plate from top to bottom and extends to the center of the hammer body inside the bottom load-bearing hammer, and the reinforced top cover, the steel plate counterweight plate, and the bottom load-bearing hammer are connected as a whole by multiple connecting bolts.

[0008] In a preferred embodiment, the bottom hammer is symmetrically arranged in a square shape with four vertical vent holes. The vent holes are circular, penetrate the bottom hammer, and are located inside the hammer ear plate 11.

[0009] In a preferred embodiment, the bottom of the steel plate counterweight is circular, and the whole is in the shape of a flat cylinder. The radius of the steel plate counterweight is half the cross-sectional dimension of the bottom load hammer.

[0010] In a preferred embodiment, three connecting bolts are provided, and the three connecting bolts are arranged in an equilateral triangle.

[0011] In a preferred embodiment, the reinforced top cover includes a top cover body and connecting bolt holes. The top cover body has a frustum structure, with a central connecting bolt hole at the center of the top cover body, and three connecting bolt holes arranged in an equilateral triangle outside the central connecting bolt hole inside the top cover body.

[0012] In a preferred embodiment, the diameter of the steel plate counterweight is equal to the bottom diameter of the top cover body, the center of the steel plate counterweight is provided with a axial connecting bolt hole, and three connecting bolt holes are provided in an equilateral triangle outside the axial connecting bolt hole inside the steel plate counterweight.

[0013] In a preferred embodiment, the hammer ear plate is a horizontally arranged rectangular steel plate and a vertically arranged perforated ear plate. The perforated ear plate is used to fix the wire rope. The wire rope is fixed by wire rope clips to form a bent arc, and four wire rope clips are fixed on each bent section.

[0014] In a preferred embodiment, the balancing plate is trapezoidal and made of high-strength manganese steel. The bottom of the balancing plate has two symmetrical through holes for connecting steel wire ropes. The upper middle position of the balancing plate is fixedly connected to the lower connecting hole of the balancing ring by a high-strength manganese steel bolt. The upper connecting hole of the balancing ring is connected to the hoisting steel wire rope of the rammer.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model creatively adopts a square column-shaped bottom force-bearing hammer, which can significantly reduce the tamping blind zone compared with traditional tamping hammers. The positioning is simple and quick, allowing the tamping hammer to flexibly control the tamping point overlap spacing during construction, avoiding uneven surging or bulging of the construction surface, and making the use more stable. It can make the tamping force more evenly transmitted, and the construction surface has a good integrated forming effect. It can greatly save machinery and labor, improve tamping efficiency, and enable the project to reduce costs and increase efficiency.

[0017] 2. The small flat-plate leveling square hammer used in this utility model creatively uses a balance lifting plate, which is made of high-strength manganese steel. This can avoid uneven winding (knotting, detachment) of the wire rope during the lifting process of the hammer, greatly enhance the safety and stability of the hammer, greatly improve the continuous working performance of the hammer, save construction time, and shorten the construction cycle.

[0018] 3. The small flat-plate leveling square hammer of this utility model is formed by fixing a large-diameter bottom force-bearing hammer and a small-diameter steel plate counterweight plate together. The large-diameter bottom force-bearing hammer at the bottom of the hammer controls the diameter of the pier body; the small-diameter steel plate counterweight plate controls the weight of the hammer. The large bottom area of ​​the bottom force-bearing hammer transitions to the smaller diameter steel plate counterweight plate, reducing stress concentration at the cross-sectional change points during tamping, and the center of gravity stabilization effect is very obvious, resulting in more accurate construction positioning.

[0019] 4. The number of steel plate counterweights in this utility model hammer can be adjusted according to specific construction needs, thereby realizing hammer weight conversion. This allows dynamic compaction construction to better meet the construction requirements of various working conditions and ensure the construction quality of dynamic compaction. The setting of the axial connecting parts and connecting bolts ensures the integrity of the combined hammer and greatly extends the service life and turnover of the combined hammer.

[0020] 5. This utility model features a symmetrical design with four exhaust holes, which are generally circular holes with a diameter of 200 mm. This design can better reduce air resistance during free fall compared to the three exhaust holes of a traditional hammer. Attached Figure Description

[0021] Figure 1 This is a side view of the structure of this utility model;

[0022] Figure 2 This is a top view of the structure of this utility model;

[0023] Figure 3 This is a bottom view of the structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the hammer ear plate of this utility model;

[0025] Figure 5 This is a structural schematic diagram of the wire rope and wire rope clip of this utility model;

[0026] Figure 6 This is a structural schematic diagram of the balance plate and balance ring of this utility model;

[0027] Figure 7 This is a structural schematic diagram of the shaft connector of this utility model;

[0028] Figure 8 This is a schematic diagram of the reinforced top cover of this utility model;

[0029] Figure 9 This is a schematic diagram of the structure of the steel plate counterweight of this utility model;

[0030] Figure 10 This is a schematic diagram of the bottom-loaded hammer structure of this invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Bottom load-bearing hammer; 11. Hammer ear plate; 2. Balance hanging plate; 3. Steel plate counterweight; 4. Reinforced top cover; 5. Shaft connector; 6. Connecting bolt; 7. Balance hanging ring; 8. Steel wire rope; 81. Steel wire rope clamp; 9. Vent hole. Detailed Implementation

[0033] The technical solutions in the embodiments of this utility model will be clearly and completely described below. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] Example 1:

[0035] like Figures 1 to 10 As shown, the small flat-plate leveling square hammer of this utility model includes: a bottom load-bearing hammer 1, a balance lifting plate 2, a steel plate counterweight 3, a reinforcing top cover 4, a shaft connecting piece 5, a balance lifting ring 7, and a steel wire rope 8. The bottom surface of the bottom load-bearing hammer 1 is square, and the whole is in the shape of a square column. The upper surface of the bottom load-bearing hammer 1 has four hammer ear plates 11 symmetrically arranged in a square shape. The balance lifting plate 2 is fixedly connected to the hammer ear plates 11 by the steel wire rope 8. The top of the balance lifting plate 2 is provided with a balance lifting ring 7, which is used to connect the lifting steel wire rope of the rammer. The steel plate counterweight 3 is set on the top of the bottom load-bearing hammer 1. The bottom of the steel plate counterweight 3 is provided with a reinforcing top cover 4. The shaft connecting piece 5 passes through the reinforcing top cover 4 and the steel plate counterweight 3 from top to bottom and extends to the center of the hammer body inside the bottom load-bearing hammer 1. The reinforcing top cover 4, the steel plate counterweight 3, and the bottom load-bearing hammer 1 are connected as a whole by multiple connecting bolts 6.

[0036] Furthermore, the bottom hammer 1 is symmetrically arranged in a square with four vertical vent holes 9. The vent holes 9 are circular holes, and the depth of the vent holes 9 penetrates the bottom hammer 1. The vent holes 9 are located inside the hammer ear plate 11. The vent hole arrangement of this utility model can better reduce the air resistance during free fall.

[0037] Furthermore, the reinforced top cover 4 is equipped with three connecting bolts 6 arranged in an equilateral triangle, which fix the steel plate counterweight 3 to the bottom load-bearing hammer 1. The lower end of the connecting bolts 6 is located at the middle of the bottom load-bearing hammer 1.

[0038] Furthermore, the reinforced top cover 4 includes a top cover body and connecting bolt holes. The top cover body has a frustum structure, with a central connecting bolt hole at its center. Three connecting bolt holes are arranged in an equilateral triangle outside the central connecting bolt hole within the top cover body. The steel plate counterweight 3 has a circular bottom and is generally flattened cylindrical. The radius of the steel plate counterweight 3 is half the cross-sectional dimension of the bottom load hammer 1, and it is centrally located. The diameter of the steel plate counterweight 3 is equal to the bottom diameter of the top cover body. Multiple steel plate counterweights 3 are provided, and their number can be determined according to actual construction needs. A central connecting bolt hole is located at the center of the steel plate counterweight 3, and three connecting bolt holes are arranged in an equilateral triangle outside the central connecting bolt hole within the steel plate counterweight 3. The depth of the connecting bolt holes is greater than 1 / 2 the height of the bottom load hammer 1. Connecting bolts 6 correspond to the connecting bolt holes of the bottom load hammer 1, steel plate counterweight 3, and reinforced top cover 4, and fix the three together.

[0039] Furthermore, the tamping hammer ear plate 11 consists of a horizontally arranged rectangular steel plate and a vertically arranged perforated ear plate. The perforated ear plate is used to fix the wire rope 8. The wire rope 8 is fixed by wire rope clips 81 to form a bent arc, and four wire rope clips 81 are fixed on each bent section, with a spacing of 100mm between the wire rope clips 81. The balance hanging plate 2 is trapezoidal and made of high-strength manganese steel. The bottom of the balance hanging plate 2 has two symmetrical through holes for connecting the wire rope 8. The upper middle position of the balance hanging plate 2 is fixedly connected to the lower connection hole of the balance lifting ring 7 by a high-strength manganese steel bolt. The upper connection hole of the balance lifting ring 7 is connected to the tamping machine lifting wire rope.

[0040] Example 2:

[0041] Taking a preferred size embodiment as an example, the structure of each component of the small flat-plate leveling square hammer of this utility model is described in detail:

[0042] like Figure 4As shown, the material selected for the hammer ear plate 11 is Q235 steel, but Q345B steel and 45# steel can also be selected according to the material inventory. Its size is 150mm*200mm*10mm thick rectangular steel plate and 140mm*140mm*50mm thick perforated ear plate are integrally made. The four hammer ear plates 11 are welded to the upper surface of the bottom load hammer 1 and are used to connect the balance hanging plate 2 through the steel wire rope 8.

[0043] like Figure 5 As shown, both the wire rope clip 81 and the wire rope 8 are made of No. 20 wire rope. The function of the wire rope clip 81 is to fix the wire rope 8 firmly to the hammer ear plate 11 and the balance hanging plate 2 by fixing the bending point of the wire rope. Four wire rope clips 81 are set on each bending section of the wire rope knot, with a spacing of 100mm.

[0044] like Figure 6 As shown, the balance plate 2 is a trapezoidal steel plate with dimensions of 500mm*300mm*50mm, and the balance ring is a steel plate ring with dimensions of 250mm*80mm*80mm. The balance plate 2 and the balance ring 7 are connected by high-strength manganese steel bolts. The bottom of the balance plate 2 has two symmetrical through holes for connecting the wire rope 8. The upper middle part of the balance plate 2 is fixedly connected to the lower connection hole of the balance ring 7 by high-strength manganese steel bolts. The upper connection hole of the balance ring 7 is connected to the hoisting wire rope of the rammer, which can avoid uneven winding (knotting, detachment) of the wire rope during the hoisting process.

[0045] like Figure 7 As shown, the shaft connector 5 is made of Q235 steel. The mushroom head has a diameter of 150mm and a thickness of 75mm. The head is set in an arc shape. The screw has a diameter of 50mm and a length of 375mm. There are small holes with a diameter of 50mm at 460mm from the mushroom head for connecting bolts 6 to pass through and fix. The thread length is 425mm. The length of the screw and the thread can be appropriately increased to ensure the flexibility of later construction.

[0046] like Figure 8 As shown, the reinforced top cover 4 is made of manganese steel and consists of connecting bolt holes and a top cover body. The top cover body is a truncated cone with a bottom diameter of 1500mm, a top diameter of 400mm, and a height of 150mm. A 50mm diameter axial connecting bolt hole is punched at the center of the top cover. Three 80mm diameter connecting bolt holes are arranged in an equilateral triangle outside the axial connecting bolt hole inside the top cover body.

[0047] The connecting bolt 6 is made of Q235 steel, with a head made of a hexagon with a diameter of 50mm and a thickness of 30mm. The screw has a diameter of 30mm, a length of 425mm, and a thread length of 375mm. The three connecting bolts 6 fix and reinforce the top cover 4 to the steel plate counterweight 3, tightly assembling all components and providing overall stability.

[0048] like Figure 9 As shown, the steel plate counterweight 3 is made of manganese steel and consists of connecting bolt holes and the main body of the counterweight. The steel plate counterweight is a flat cylinder with a diameter of 1500mm and a height of 100mm. A 50mm diameter axial connecting bolt hole 31 is punched at the center of the steel plate counterweight, and three connecting bolt holes 32 are arranged in an equilateral triangle outside the axial connecting bolt hole inside the steel plate counterweight 3.

[0049] like Figure 10 As shown, the bottom hammer 1 is made of iron and is cut from a square column with a length of 1500mm, a width of 1500mm, and a height of 300mm. The hammer ear plates 11 are arranged in a square according to the design position, and each is 350mm away from the edge of the hammer. The exhaust holes 9 are punched with a diameter of 50mm according to the design position. The four exhaust holes 9 are arranged in a square between the hammer ear plates 11. The hole depth is through the bottom hammer 1 and each is 733mm away from the edge of the hammer. The connecting bolt hole with a diameter of 30mm and the shaft connecting hole with a diameter of 50mm are punched, and the hole depth is 220mm.

[0050] The manufacturing and assembly method of the small flat-plate leveling square hammer of this utility model includes the following steps:

[0051] Step 1: Draw the structural machining drawing of the small flatbed leveling square hammer. Based on the dimensions of all nodes of the components in the machining drawing, determine the dimensions of each component of the small flatbed leveling square hammer.

[0052] Step 2: Make the bottom load-bearing hammer 1, and weld four hammer ear plates 11 in a square symmetrical manner on the upper surface of the bottom load-bearing hammer 1. The bottom load-bearing hammer 1 is a square column with a length of 1500mm, a width of 1500mm, and a height of 300mm.

[0053] Step 3: Make steel plate counterweight 3, wherein the bottom of steel plate counterweight 3 is circular, and the radius of steel plate counterweight 3 is half the cross-sectional dimension of the bottom load hammer 1;

[0054] Step 4: Make the reinforced top cover 4. Hoist the appropriate number of steel plate counterweights 3 and the reinforced top cover 4 to the center of the bottom load hammer 1 completed in Step 2, and connect and reinforce them by the axial connector 5 and the connecting bolts 6.

[0055] Step 5: Make the balance plate 4, and fix the wire rope 8 to the hammer ear plate 11 and the balance plate 4 respectively by the wire rope clip 81.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small flat-plate square hammer, characterized in that: include: The bottom force-bearing hammer (1) has a square bottom surface and is in the shape of a square column. The upper surface of the bottom force-bearing hammer (1) is symmetrically provided with four hammer ear plates (11). The balance plate (2) is fixedly connected to the hammer ear plate (11) by a steel wire rope (8), and a balance ring (7) is provided on the top of the balance plate (2). The steel plate counterweight (3) is provided in multiple pieces. The steel plate counterweight (3) is provided on the top of the bottom hammer (1). The bottom of the steel plate counterweight (3) is provided with a reinforcing top cover (4). The shaft connecting piece (5) passes through the reinforcing top cover (4) and the steel plate counterweight (3) from top to bottom and extends to the center of the hammer body inside the bottom hammer (1). The reinforcing top cover (4), the steel plate counterweight (3) and the bottom hammer (1) are connected as a whole by multiple connecting bolts (6).

2. The small flat-plate leveling square hammer according to claim 1, characterized in that: The bottom hammer (1) is symmetrically arranged in a square shape with four vertical vent holes (9). The vent holes (9) are circular and penetrate the bottom hammer (1) to a depth of 1. The vent holes (9) are located inside the hammer ear plate (11).

3. The small flat-plate leveling square hammer according to claim 1, characterized in that: The bottom of the steel plate counterweight (3) is circular, and the whole is in the shape of a flat cylinder. The radius of the steel plate counterweight (3) is half the cross-sectional dimension of the bottom hammer (1).

4. The small flat-plate leveling square hammer according to claim 1, characterized in that: There are three connecting bolts (6), and the three connecting bolts (6) are arranged in an equilateral triangle.

5. The small flat-plate leveling square hammer according to claim 4, characterized in that: The reinforced top cover (4) includes a top cover body and connecting bolt holes. The top cover body is a frustum structure. A axial connecting bolt hole is provided at the center of the top cover body. Three connecting bolt holes are provided in an equilateral triangle outside the axial connecting bolt hole inside the top cover body.

6. The small flat-plate leveling square hammer according to claim 5, characterized in that: The diameter of the steel plate counterweight (3) is equal to the bottom diameter of the main body of the top cover. The center of the steel plate counterweight (3) is provided with a axial connecting bolt hole, and the outer side of the axial connecting bolt hole of the steel plate counterweight (3) is provided with three connecting bolt holes in an equilateral triangle.

7. The small flat-plate leveling square hammer according to claim 1, characterized in that: The hammer ear plate (11) is a horizontally arranged rectangular steel plate and a vertically arranged perforated ear plate. The perforated ear plate is used to fix the wire rope (8). The wire rope (8) is fixed by wire rope clips (81) to form a bent arc, and four wire rope clips (81) are fixed on each bent section.

8. The small flat-plate leveling square hammer according to claim 1, characterized in that: The balance plate (2) is trapezoidal and made of high-strength manganese steel. The bottom of the balance plate (2) has two symmetrical through holes for connecting the wire rope (8). The upper middle part of the balance plate (2) is fixedly connected to the lower connecting hole of the balance ring (7) by a high-strength manganese steel bolt. The upper connecting hole of the balance ring (7) is connected to the hoisting wire rope of the rammer.

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