Structure of rammer for ramming machine

Abstract

The utility model relates to rammer structure is rammed with rammer for strong rammer, including with hoisting chain connection's cylinder and ring, the ring is coaxial with cylinder, the ring is set in the cylinder outer periphery and axial sliding connection, the ring top surface is provided with the lifting ring connected with sling. Through cylinder first impact extrusion center soil body and extrude to all around, ring lags behind and applies horizontal thrust to impact edge area, in this way will impact energy be divided into two stages, formed "extrusion - push away" mechanism, will the loose dust effectively push away from the center to the periphery, has improved the problem that the traditional rammer dust diffuses disorderly.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to the structure of a ramming hammer used in a dynamic compaction machine. Background Technology

[0002] Dynamic compaction, also known as powerful tamping or dynamic consolidation, is a method that uses a large tracked dynamic compaction machine to lift an 8-30 ton hammer to a height of 6-30 meters via slings and then drop it freely onto the ground to forcefully compact the soil. This improves the bearing capacity and compression modulus of the foundation, forming a relatively uniform and dense foundation.

[0003] Traditional tamping hammers typically employ a single, rigid structure. Therefore, when a monolithic tamping hammer impacts the ground, the impact force acts instantaneously across the entire hammer base contact surface. The resulting shock wave primarily diffuses vertically and outwards, lacking an effective mechanism to guide loose surface dust in a specific direction (such as pushing it outwards), hindering subsequent cleaning or the formation of a smoother surface. This problem is particularly pronounced in the treatment of large-area foundations with loose or high silt content, impacting construction efficiency and the final foundation surface quality. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a hammer structure for a dynamic compaction machine, so as to solve the problem that existing hammers usually adopt a single integral rigid structure, which lacks an effective mechanism to guide the loose surface dust in a specific direction when compacting the ground, resulting in impact force.

[0005] This utility model is achieved through the following technical solution:

[0006] A hammer structure for a dynamic compaction machine includes a column and a ring connected to a lifting chain. The ring is coaxial with the column and is sleeved on the outer periphery of the column and axially slidably connected. A lifting ring connected to a sling is provided on the top surface of the ring.

[0007] Furthermore, a first limiting component is provided between the column and the ring, the first limiting component being used to limit the sliding trajectory of the ring and prevent the ring from disengaging from the sliding connection state with the column.

[0008] Further defined, the first limiting component includes a first limiting groove and a first limiting block located between the column and the ring, the first limiting groove extending along the axial direction of the column, the first limiting block located within the first limiting groove, and the first limiting block slidably connected to the first limiting groove.

[0009] Further specified, the first limiting groove is formed on the outer wall of the column, and the first limiting block is disposed on the inner wall of the ring;

[0010] Alternatively, the first limiting groove is formed on the inner wall of the ring, and the first limiting block is disposed on the outer wall of the column.

[0011] Further specifying, the ring body is provided in at least two parts, and two adjacent ring bodies are coaxially arranged to form an inner ring and an outer ring, with the outer ring fitted outside the inner ring. The inner ring and the outer ring are axially slidably connected, and a lifting ring is provided on the top surface of the outermost ring body.

[0012] Furthermore, a second limiting component is provided between the inner ring and the outer ring. The second limiting component is used to limit the sliding trajectory between the inner ring and the outer ring and to prevent the outer ring from disengaging from the sliding connection with the inner ring.

[0013] Further defined, the second limiting component includes a second limiting groove and a second limiting block, the second limiting groove extends along the axial direction of the ring body, the second limiting block is located in the second limiting groove, and the second limiting block is slidably connected to the second limiting groove.

[0014] Further specified, the second limiting groove is formed on the outer wall of the inner ring, and the second limiting block is disposed on the inner wall of the outer ring;

[0015] Alternatively, the second limiting groove is formed on the inner wall of the outer ring, and the second limiting block is set on the outer wall of the inner ring.

[0016] The beneficial effects of this utility model are as follows:

[0017] By first impacting and squeezing the central soil with the column and then pushing it outwards, and then impacting the edge area with the ring and applying horizontal thrust, the impact energy is divided into two stages, forming a "squeeze-push" mechanism. This effectively pushes the loose dust from the center to the periphery, significantly improving the problem of disordered dust diffusion in traditional tamping hammers.

[0018] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the column and ring in state one in Embodiment 1 of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the column and ring in state two in Embodiment 1 of this utility model;

[0021] Figure 3 This is a cross-sectional view of the column and ring in state two in Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the column and inner ring, middle ring and outer ring in state one in Embodiment 2 of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the column and inner ring, middle ring and outer ring in state two in Embodiment 2 of this utility model;

[0024] Figure 6 This is a cross-sectional view of the column and inner ring, middle ring and outer ring in Embodiment 2 of this utility model.

[0025] In the picture:

[0026] 1. Column; 2. Ring; 3. First limiting groove; 301. First limiting block; 4. Inner ring; 5. Middle ring; 6. Outer ring; 7. Second limiting groove; 701. Second limiting block; 8. Lifting ring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" merely indicates that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; it can be slightly tilted. The attached diagrams are schematic representations of the structure and are only used to illustrate the structure, position, and connection relationships between the components. The proportions and quantities of the components do not represent actual proportions or quantities.

[0032] This utility model provides a technical solution:

[0033] Please see Figure 1-3 Example 1:

[0034] The structure of the hammer for compaction in a dynamic compaction machine includes a column 1 and a ring 2 connected to a lifting chain. The ring 2 is coaxial with the column 1 and is sleeved on the outer periphery of the column 1 and axially slidably connected. The top surface of the ring 2 is provided with a lifting ring 8 connected to a sling.

[0035] In this design, column 1 and ring 2 can be in the following states:

[0036] State 1: When the column 1 and the ring 2 are placed on the same plane or suspended in the air, the bottom surfaces of the column 1 and the ring 2 are located on the same horizontal plane;

[0037] State 2: After connecting the slings and lifting rings 8, the dynamic compaction machine applies an upward lifting force to the ring 2 through the cooperation of the slings and lifting rings 8, causing the ring 2 to be lifted upward first. Meanwhile, under the influence of gravity and the sliding contact with the ring 2, the bottom surface of the column 1 forms a height difference with the bottom surface of the ring 2. In this state, when the column 1 and ring 2 fall downward, because the bottom surface of the column 1 is lower than the bottom surface of the ring 2, the column 1 contacts the ground faster than the ring 2. The impact force at the bottom of the column 1 mainly acts on the soil in the central area, producing a strong vertical downward compaction effect and instantly squeezing the central soil, causing the soil to undergo a certain degree of plastic deformation and compression in all directions (mainly radially).

[0038] When column 1 impacts the ground first, ring 2 lags behind column 1 for a short time before impacting the ground, achieving a secondary impact. The area impacted by ring 2 is the edge area that has been initially compressed by column 1 but has a relatively loose surface.

[0039] At this point, the radial compressive stress in the central soil area caused by the impact of column 1 has not completely dissipated. The impact force at the bottom of ring 2 acts on the edge soil in this stress state, not only producing vertical compaction, but also converting a portion of its impact energy into a horizontal force. This horizontal force will push the loose, compressed soil (mainly surface dust and disturbed soil) caused by the impact of column 1 to move outwards.

[0040] That is, when the ground is compacted using the hammer structure of the dynamic compaction machine in this utility model, the column 1 first impacts and squeezes the central soil and pushes it outwards, while the ring 2 impacts the edge area and applies horizontal thrust. In this way, the impact energy is divided into two stages, forming a "compression-pushing" mechanism, which effectively pushes the loose dust from the center to the outside, significantly improving the problem of disordered dust diffusion in traditional hammers.

[0041] In this embodiment, a first limiting component is provided between the column 1 and the ring 2. The first limiting component is used to limit the sliding trajectory of the ring 2 and prevent the ring 2 from detaching from the sliding connection state with the column 1.

[0042] In this solution, the first limiting component ensures that the ring 2 can only slide along the axial direction (i.e., vertical direction) of the column 1 in a limited trajectory, so that the ring 2 is not prone to rotation, radial displacement or complete separation from the column 1 during impact, lifting or transportation.

[0043] In this embodiment, the first limiting component includes a first limiting groove 3 and a first limiting block 301 located between the column 1 and the ring 2. The first limiting groove 3 extends along the axial direction of the column 1, and the first limiting block 301 is located within the first limiting groove 3, and the first limiting block 301 is slidably connected to the first limiting groove 3.

[0044] In this design, the sliding engagement of the first limiting groove 3 and the first limiting block 301 creates a constraint between the column 1 and the ring 2. When the ring 2 slides relative to the column 1, the first limiting block 301 slides axially within the first limiting groove 3. The sidewall of the first limiting groove 3 restricts the radial movement and rotation of the limiting block (thereby restricting the ring 2).

[0045] The first limiting groove 3 is a groove (which can be a T-groove, dovetail groove or simple straight groove) extending along the axial direction (length direction) of the column 1.

[0046] The first limiting block 301 is a protrusion or slider whose shape matches the limiting groove and is embedded in the groove.

[0047] In this embodiment, the first limiting groove 3 is formed on the outer wall of the column 1, and the first limiting block 301 is disposed on the inner wall of the ring 2.

[0048] Alternatively, the first limiting groove 3 is formed on the inner wall of the ring body 2, and the first limiting block 301 is set on the outer wall of the column body 1.

[0049] This plan provides two manufacturing options for column 1 and ring 2:

[0050] Option A: The first limiting groove 3 is on the outer wall of the column 1, and the first limiting block 301 is on the inner wall of the ring 2;

[0051] Option B: The first limiting groove 3 is on the inner wall of the ring 2, and the first limiting block 301 is on the outer wall of the column 1.

[0052] The two schemes are functionally equivalent, both achieving axial sliding constraint of the limit block within the limit groove.

[0053] The two options offer manufacturing flexibility, allowing for the selection of a more optimal or economical layout based on the materials, processing techniques (casting, forging, machining), and ease of maintenance of column 1 and ring 2. For example, if column 1 is solid forged steel, machining grooves on it may be more convenient; if ring 2 is cast in sections, it may be more reasonable to set grooves or blocks on the inner wall.

[0054] Please see Figure 4-6 Example 2: The difference from Example 1 is that:

[0055] At least two ring bodies 2 are provided. Two adjacent ring bodies 2 are coaxially arranged to form an inner ring and an outer ring. The outer ring is sleeved outside the inner ring. The inner ring and the outer ring are axially slidably connected. A lifting ring 8 is provided on the top surface of the outermost ring body 2.

[0056] The difference between this solution and Embodiment 1 is that the ring 2 is a multi-level ring 2 structure (at least two ring 2 are nested in layers; this embodiment takes three ring 2 as an example).

[0057] Multiple ring bodies 2 are coaxially nested (the outer ring nests the inner ring, and the innermost inner ring is nested on the column body 1), and adjacent ring bodies 2 are also axially slidingly connected.

[0058] In practical use, for ease of understanding, this embodiment takes the three ring bodies 2, consisting of an inner ring 4, a middle ring 5, and an outer ring 6 arranged from the inside out, as an example. The lifting ring 8 is installed on the top surface of the outer ring 6, and the column body 1, inner ring 4, middle ring 5, and outer ring 6 can present the following state:

[0059] State 1: When the column 1, inner ring 4, middle ring 5 and outer ring 6 are placed on the same plane or suspended in the air, the bottom surfaces of the column 1, inner ring 4, middle ring 5 and outer ring 6 are located on the same horizontal plane;

[0060] Scenario 2: After connecting the slings and lifting rings 8, the dynamic compaction machine, through the cooperation of the slings and lifting rings 8, applies an upward lifting force to the outer ring 6, causing the outer ring 6 to be lifted first. Meanwhile, under the influence of gravity and the sliding contact between them, the bottom surfaces of the middle ring 5, inner ring 4, and column 1 form a conical height difference, ultimately resulting in the lowest height of the bottom surface of column 1, followed by the inner ring 4, middle ring 5, and finally the outer ring 6. Therefore, when column 1, inner ring 4, middle ring 5, and outer ring 6 fall downwards after being suspended in the air, column 1 will contact the ground faster than the inner ring 4, middle ring 5, and outer ring 6. Then, the inner ring 4, middle ring 5, and outer ring 6 will contact the ground sequentially from the inside out.

[0061] Column 1 is the first to contact the ground and generate impact: compacting the central area;

[0062] Subsequently, the inner ring 4 comes into contact with the ground and generates an impact: lagging behind the column 1, it impacts the annular zone adjacent to the central area, compacts the area, and pushes the soil further outward.

[0063] Subsequently, the Middle Ring 5 came into contact with the ground and generated an impact: impacting the outer ring area, continuing to compact and push.

[0064] Subsequently, the outer ring 6 contacts the ground and generates a final impact: impacting the outermost area, mainly completing the final outward movement of the surface dust and edge compaction.

[0065] The column 1 and the multi-ring 2 sequentially contact the ground and generate impact, creating a "ripple" effect that impacts from the center outwards. In this method, the multi-ring 2 further subdivides the impact and pushing process into more steps, and the dust is pushed more gently from the center to the periphery.

[0066] In this embodiment, a second limiting component is provided between the inner ring and the outer ring. The second limiting component is used to limit the sliding trajectory between the inner ring and the outer ring and to prevent the outer ring from disengaging from the sliding connection with the inner ring.

[0067] In this scheme, the second limiting component limits the adjacent rings 2 to only slide along the specified axial direction, so that multiple rings 2 are less likely to rotate relative to each other, misalign radially or detach during impact or lifting, thus preventing instability.

[0068] In this embodiment, the second limiting component includes a second limiting groove 7 and a second limiting block 701. The second limiting groove 7 extends along the axial direction of the ring body 2, and the second limiting block 701 is located inside the second limiting groove 7 and is slidably connected to the second limiting groove 7.

[0069] In this scheme, the sliding engagement of the second limiting groove 7 and the second limiting block 701 forms a constraint between the multi-level ring bodies 2. When the outer ring slides relative to the inner ring, the second limiting block 701 slides axially in the second limiting groove 7. The side wall of the second limiting groove 7 restricts the radial movement and rotation of the limiting block (thereby restricting the ring body 2).

[0070] The second limiting groove 7 is a groove (which can be a T-groove, dovetail groove or simple straight groove) extending along the axial direction (length direction) of the column 1.

[0071] The second limiting block 701 is a protrusion or slider whose shape matches the limiting groove and is embedded in the groove.

[0072] In this embodiment, the second limiting groove 7 is formed on the outer wall of the inner ring, and the second limiting block 701 is disposed on the inner wall of the outer ring;

[0073] Alternatively, the second limiting groove 7 is formed on the inner wall of the outer ring, and the second limiting block 701 is disposed on the outer wall of the inner ring.

[0074] This plan provides two options for manufacturing ring 2:

[0075] Option C: The second limiting groove 7 is on the outer wall of the inner ring, and the second limiting block 701 is on the inner wall of the outer ring;

[0076] Option D: The second limiting groove 7 is on the inner wall of the outer ring, and the second limiting block 701 is on the outer wall of the inner ring.

[0077] The two schemes are functionally equivalent, both achieving axial sliding constraint of the second limiting block 701 within the second limiting groove 7.

[0078] The two options provide manufacturing flexibility, allowing for the selection of a more suitable option based on the specific design and processing method of the multi-level ring 2.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A hammer structure for use in a dynamic compaction machine, characterized in that: It includes a column (1) and a ring (2), the ring (2) is coaxial with the column (1), the ring (2) is sleeved on the outer circumference of the column (1) and axially slidably connected, and the top surface of the ring (2) is provided with a lifting ring (8) connected to the sling.

2. The hammer structure for dynamic compaction as described in claim 1, characterized in that: A first limiting component is provided between the column (1) and the ring (2). The first limiting component is used to limit the sliding trajectory of the ring (2) and prevent the ring (2) from detaching from the sliding connection state with the column (1).

3. The hammer structure for dynamic compaction as described in claim 2, characterized in that: The first limiting component includes a first limiting groove (3) and a first limiting block (301) located between the column (1) and the ring (2). The first limiting groove (3) extends along the axial direction of the column (1), and the first limiting block (301) is located in the first limiting groove (3) and is slidably connected to the first limiting groove (3).

4. The hammer structure for dynamic compaction as described in claim 3, characterized in that: The first limiting groove (3) is opened on the outer wall of the column (1), and the first limiting block (301) is set on the inner wall of the ring (2); Alternatively, the first limiting groove (3) is opened on the inner wall of the ring (2), and the first limiting block (301) is set on the outer wall of the column (1).

5. The hammer structure for dynamic compaction as described in claim 1, characterized in that: At least two ring bodies (2) are provided. Two adjacent ring bodies (2) are coaxially arranged to form an inner ring and an outer ring. The outer ring is sleeved outside the inner ring. The inner ring and the outer ring are axially slidably connected. A lifting ring (8) is provided on the top surface of the outermost ring body (2).

6. The hammer structure for dynamic compaction according to claim 5, characterized in that: A second limiting component is provided between the inner ring and the outer ring. The second limiting component is used to limit the sliding trajectory between the inner ring and the outer ring and to prevent the outer ring from disengaging from the sliding connection with the inner ring.

7. The hammer structure for dynamic compaction according to claim 6, characterized in that: The second limiting component includes a second limiting groove (7) and a second limiting block (701). The second limiting groove (7) extends along the axial direction of the ring body (2). The second limiting block (701) is located in the second limiting groove (7) and is slidably connected to the second limiting groove (7).

8. The hammer structure for dynamic compaction according to claim 7, characterized in that: The second limiting groove (7) is opened on the outer wall of the inner ring, and the second limiting block (701) is disposed on the inner wall of the outer ring; Alternatively, the second limiting groove (7) is opened on the inner wall of the outer ring, and the second limiting block (701) is disposed on the outer wall of the inner ring.

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