CN217203992U

CN217203992U - Variable cross-section combined dynamic compaction hammer

Info

Publication number: CN217203992U
Application number: CN202220835243.7U
Authority: CN
Inventors: 华栓; 闫振兴; 褚海伟; 张兵; 周娴; 焦志国; 刘雪峰; 董宝志; 冯振甲
Original assignee: Shanxi Jinbao Island Foundation Engineering Co ltd; China Construction Second Engineering Bureau Co Ltd
Current assignee: Shanxi Jinbao Island Foundation Engineering Co ltd; China Construction Second Engineering Bureau Co Ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-08-16
Anticipated expiration: 2032-04-12

Abstract

The utility model relates to a dynamic compaction construction equipment field specifically discloses a combined dynamic compaction hammer of variable cross section, including basic rammer and guide rammer, basic rammer is type, its bottom is cylindric hammer block, its hammer block top middle part an organic whole is provided with the hammer neck of vertical extension, and seted up the exhaust hole on the hammer block in its hammer neck outside, the hammer neck is cylindricly, and its axle center and hammer block axle center collineation, hammer neck top central point puts threaded connection has the first hoist and mount screw rod of mushroom rather than the coaxial setting, and the bottom of the first hoist and mount screw rod of mushroom runs through the hammer neck and extends to the internal certain degree of depth department of hammer, the guide rammer is cylindricly, its top fixed connection is put at the bottom central point of basic rammer body, and its axle center and hammer block axle center collineation, its cross section size is less than the cross section size of hammer block and is greater than the cross section size of hammer neck. The utility model discloses can increase the replacement degree of depth by a wide margin, the location is accurate moreover, is difficult to cause the condition that the construction hammer body inhales hammer and askew hammer, has reached the purpose of upgrading increase effect.

Description

Variable cross-section combined dynamic compaction hammer

Technical Field

The utility model relates to a dynamic compaction construction equipment field, concretely relates to combined dynamic compaction hammer of variable cross section.

Background

The dynamic compaction replacement foundation treatment construction method has the advantages of high treatment speed, low manufacturing cost and wide influence range, but the dynamic compaction construction is also insufficient, for example, when the foundation soil belongs to high-sensitivity silty clay and the water content is high, the depth of a dynamic compaction replacement pier body of the conventional rammer cannot be ensured. The traditional rammer has large bottom area and small bottom area (mainly in a conical shape or a circular truncated cone shape), when the rammer is large in bottom area, under the condition that the weights of the rammers are the same, the larger the bottom area of the rammer is, the smaller the ramming force applied to the foundation in unit area is, the harder the material of a displaced pier body is to be driven into the foundation, the displacement depth of the pier body is insufficient, when the rammer is small in bottom area, the weight of the hammer is not changed, the height of the hammer body can be correspondingly increased, the drop distance is reduced, and when the bottom area is too small, hole collapse is easily caused, and the dynamic compaction effect is not ideal.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a combined rammer that is forced in variable cross section to solve in the background art technical problem.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

a combined dynamic compaction hammer with variable cross sections comprises a basic compaction hammer and a guide compaction hammer, wherein the basic compaction hammer is in a convex shape, the bottom of the basic compaction hammer is a cylindrical hammer body, a vertically extending hammer neck is integrally arranged at the middle of the top end of the hammer body, a plurality of exhaust holes which are vertically communicated are formed in the hammer body outside the hammer neck according to an annular array, the hammer neck is cylindrical, the axis of the hammer neck is collinear with the axis of the hammer body, the top of the hammer neck is cut into a round table shape, a mushroom head hoisting screw rod which is coaxially arranged with the hammer neck is in threaded connection at the central position of the top of the hammer neck, the bottom end of the mushroom head hoisting screw rod penetrates through the hammer neck and extends to a certain depth in the hammer body, the guide compaction hammer is cylindrical, the top end of the guide hammer is fixedly connected at the central position of the bottom end of the basic compaction hammer body, the axis of the guide hammer is collinear with the axis of the hammer body, a plurality of reinforcing support plates are fixedly arranged at the connecting position of the guide compaction hammer and the basic compaction hammer according to the annular array, the cross section size of the hammer is smaller than that of the hammer body and larger than that of the hammer neck, and the section radius of the hammer is smaller than the shortest distance between the exhaust hole and the axle center of the basic rammer.

Preferably, for the convenience according to actual demand increase and decrease rammer weight, the cover is equipped with the reinforcement top cap that increases weight on the hammer neck of basis rammer hammer body top, the reinforcement top cap that increases weight includes integrative two parts that link to each other, and its top bottom two parts are round platform form and cylindric respectively, and the axle center department of its top bottom two parts link up and offered and hammer neck size assorted cylindric through-hole, and the cylindrical external diameter of its bottom and the size phase-match of hammer block position cylinder, and the reinforcement top cap that increases weight is fixed continuous with the hammer body through the connecting bolt that a plurality of laid according to annular array, and the exhaust hole has been seted up to correspondence on its body, and the exhaust hole axial alignment of seting up on the exhaust hole of seting up on its body and the hammer body.

Preferably, for the convenience according to actual demand increase and decrease rammer weight, the cover is equipped with a plurality of weight increasing hammer leaf on the hammer neck between weight increasing reinforcement top cap and the hammer block, weight increasing hammer leaf is the ring column form, and its internal and external diameter respectively with the hammer neck and the size phase-match of hammer block position cylinder, weight increasing hammer leaf and weight increasing reinforcement top cap stack in proper order on the hammer block to connecting bolt and the hammer block that lay according to annular array through a plurality of are fixed continuous, and the exhaust hole has been seted up to correspondence on the two bodies, and the exhaust hole that sets up on the two bodies aligns with the exhaust hole axial that sets up on the hammer block.

Preferably, in order to prolong the service life of the hammer body and avoid the problem of inaccurate positioning of the hammer body caused by uneven wear, the outer annular surface of the weight increasing piece, the exposed parts of the outer annular surface and the bottom surface of the basic rammer and the outer annular surface and the bottom surface of the guiding rammer are all fixedly provided with a wear-resistant reinforcing layer, and the weight increasing reinforcing top cover and the wear-resistant reinforcing layer are made of the same material.

Preferably, in order to improve the integrity of the weight increasing and reinforcing top cover and the foundation rammer, a hoisting hoop is sleeved on a hammer neck above the weight increasing and reinforcing top cover, the hoisting hoop is fixedly connected with a mushroom head hoisting screw and the hammer neck through a plurality of socket bolts, the bottom end of the hoisting hoop abuts against the top surface of the weight increasing and reinforcing top cover and compresses the weight increasing and reinforcing top cover on a hammer body of the foundation rammer, and the socket bolts vertically penetrate through the hoisting hoop, the hammer neck of the foundation rammer and the mushroom head hoisting screw corresponding to the axle center of the hoisting hoop and fixedly connect the hoisting hoop, the hammer neck of the foundation rammer and the mushroom head hoisting screw.

Preferably, the reinforcing support plate is a right-angle triangular plate made of wear-resistant manganese steel materials, and the plate surfaces corresponding to the two right-angle sides of the reinforcing support plate are respectively welded and fixed with the bottom surface of the basic rammer body and the outer ring surface of the guide rammer.

Preferably, for the structural strength who improves hoist and mount cuff, hoist and mount cuff includes the reinforcement sleeve pipe of hugging closely on the hammer neck outer wall, reinforcement sleeve pipe top both ends welded fastening respectively have a reinforcement steel ring, and according to annular array welded fastening have a plurality of reinforcing bars on the reinforcement sleeve pipe outer wall.

Preferably, in order to facilitate the mounting and dismounting of the weight-increasing reinforcing top cover, a plurality of lifting hooks are welded and fixed on the top of the weight-increasing reinforcing top cover according to an annular array.

Preferably, the foundation rammer, the guide rammer and the weight increasing hammer piece are all made of cast iron materials, and the weight increasing reinforcing top cover and the wear-resisting reinforcing layer are all made of manganese steel materials.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the special-shaped guiding combined hammer is formed by fixedly connecting the base rammer with large diameter and the guiding rammer with small diameter, the guiding rammer with small diameter at the lower part of the rammer directly jumps from larger bottom area of the base rammer to smaller bottom area under the condition of no excessive slope, thereby not only greatly increasing the static pressure value, but also leading the force application direction to be more concentrated without conversion loss in the horizontal direction, under the same weight of the hammer body, the replacement depth can be greatly increased, the construction guiding function of guiding the rammer is very obvious, the construction positioning is accurate, repeated positioning is not needed, the construction time is saved, the condition that the construction hammer body absorbs the hammer and is inclined is not easy to cause due to the small bottom area of the guide rammer with the small diameter, the hammer is easy to pull, so that the construction efficiency is greatly increased, the construction time is saved, the construction environment is improved, and the construction period is shortened;

2. the utility model discloses the rammer can be according to the quantity of concrete construction demand adjustment weight gain hammer leaf and add the reinforcement top cap that increases weight, and then realize the conversion of hammer weight, the wholeness of combination hammer has been guaranteed in setting up of hammer neck, hoist and mount cuff and connecting bolt, the setting of the wear-resisting back up coat of manganese steel material has prolonged the life cycle and the turnover number of times of combination hammer by a wide margin for the construction demand of the higher high sensitivity powder clay operating mode of moisture content can be satisfied better in the dynamic compaction construction, guarantees the construction quality of dynamic compaction construction.

Drawings

The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are given by way of illustration only and not by way of limitation, wherein:

fig. 1 is a schematic front view of the present invention;

fig. 2 is a schematic top view of the present invention;

fig. 3 is a schematic bottom view of the present invention;

FIG. 4 is a schematic structural view of the mushroom head lifting screw of the present invention;

fig. 5 is a schematic view of the front view structure of the hoisting hoop of the present invention;

fig. 6 is a schematic view of a top view structure of the hoisting hoop of the present invention;

fig. 7 is a schematic structural view of the socket bolt of the present invention;

fig. 8 is a schematic structural view of the connecting bolt of the present invention;

fig. 9 is a schematic front view of the weight-increasing reinforcing top cap of the present invention;

fig. 10 is a schematic top view of the weight-increasing reinforcing top cap of the present invention;

FIG. 11 is a schematic front view of the basic rammer of the present invention;

fig. 12 is a schematic top view of the basic rammer of the present invention.

Reference numerals: 1-mushroom head hoisting screw, 2-hoisting hoop, 3-socket bolt, 4-connecting bolt, 5-weight increasing and reinforcing top cover, 6-weight increasing hammer piece, 7-foundation rammer, 8-guiding rammer, 9-wear-resistant reinforcing layer, 10-reinforcing support plate, 11-vent hole and 12-lifting hook.

Detailed Description

Hereinafter, embodiments of a variable cross-section combined type dynamic compactor of the present invention will be described with reference to the accompanying drawings. The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other embodiments that are obvious based on the disclosure of the claims and the specification herein, including those that employ any obvious substitutions and modifications to the embodiments described herein.

In the description of the present invention, it should be noted that the terms "top", "bottom", "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof. It should be noted that for the sake of clarity in showing the structures of the various components of the embodiments of the present invention, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.

The principles and features of the present invention are described below in conjunction with the following drawings, the illustrated embodiments are provided to explain the present invention and not to limit the scope of the invention. The preferred embodiments of the present invention will be described in further detail below with reference to fig. 1-12:

as shown in fig. 1-3, the preferred combined dynamic compaction hammer with variable cross-section of the present invention comprises a basic rammer 7 and a guiding rammer 8, wherein the basic rammer 7 is in a shape of Chinese character 'tu', the bottom thereof is a cylindrical rammer body, a vertically extending ram neck is integrally arranged at the middle of the top end of the rammer body, a plurality of vertically through exhaust holes 11 are arranged on the rammer body outside the ram neck according to an annular array, the ram neck is cylindrical, the axis of the ram neck is collinear with the axis of the rammer body, the top of the ram neck is truncated cone-shaped so as to facilitate the penetration of a weight increasing hammer sheet 6, a weight increasing reinforcing top cover 5 and a lifting hoop 2, the central position of the top of the ram neck is in threaded connection with a mushroom head lifting screw 1 coaxially arranged therewith, the bottom end of the mushroom head lifting screw 1 penetrates through the ram neck and extends to a certain depth inside the rammer body, the guiding rammer 8 is cylindrical, the top end thereof is fixedly connected at the central position of the bottom end of the basic rammer 7, the axis of the guide rammer 8 is collinear with the axis of the hammer body, the size of the cross section of the guide rammer is smaller than that of the cross section of the hammer body and larger than that of the hammer neck, the radius of the cross section of the guide rammer is smaller than the shortest distance between the exhaust hole 11 and the axis of the basic rammer 7, in order to improve the connection firmness of the basic rammer 7 and the guide rammer 8, a plurality of reinforcing support plates 10 are fixedly distributed at the connecting positions of the guide rammer 8 and the basic rammer 7 according to an annular array, the reinforcing support plates 10 are right-angled triangular plates made of wear-resistant manganese steel materials, and the plate surfaces corresponding to two right-angled edges of the reinforcing support plates are respectively welded and fixed with the bottom surface of the hammer body of the basic rammer 7 and the outer ring surface of the guide rammer 8;

the weight increasing and reinforcing top cover 5 is characterized in that a weight increasing piece 6, a weight increasing and reinforcing top cover 5 and a hoisting hoop 2 are sequentially sleeved on a hammer neck above a hammer body of the foundation rammer 7 from bottom to top, whether the weight increasing piece 6 and the weight increasing and reinforcing top cover 5 are arranged or not and the arrangement number of the weight increasing pieces 6 can be determined according to actual construction requirements, the weight increasing piece 6 is in a circular column shape, the inner diameter and the outer diameter of the weight increasing piece are respectively matched with the size of the circular column at the hammer neck and the hammer body part, the weight increasing and reinforcing top cover 5 comprises two integrally connected parts, the top part and the bottom part of the weight increasing and reinforcing top cover are respectively in a circular table shape and a circular column shape, a circular column-shaped through hole matched with the size of the hammer neck is arranged at the axial center of the top part and the bottom part of the circular column-shaped through hole is arranged at the axial center of the two parts of the top part of the weight increasing piece, the outer diameter of the bottom part of the circular column-shaped through hole is matched with the size of the circular column at the hammer body part of the weight increasing piece, and the weight increasing piece are welded and fixed with a plurality of the hoisting hooks 12 at the top of the top cover 5 according to the circular column-shaped weight increasing piece, the weight increasing hammer sheet 6 and the weight increasing reinforcing top cover 5 are sequentially stacked on the hammer body and fixedly connected with the hammer body through a plurality of connecting bolts 4 distributed according to an annular array, exhaust holes 11 are correspondingly formed in the bodies of the weight increasing hammer sheet 6 and the weight increasing reinforcing top cover 5, the exhaust holes 11 formed in the bodies of the weight increasing hammer sheet and the weight increasing reinforcing top cover are axially aligned with the exhaust holes 11 formed in the hammer body, the hoisting hoop 2 comprises a reinforcing sleeve closely attached to the outer wall of the hammer neck, reinforcing steel rings are respectively welded and fixed to two ends of the top end of the reinforcing sleeve, a plurality of reinforcing steel bars are welded and fixed to the outer wall surface of the reinforcing sleeve according to the annular array, the hoisting hoop 2 is fixedly connected with the mushroom head hoisting screw rod 1 and the hammer neck through a plurality of socket bolts 3, the bottom end of the hoisting hoop supports against the top surface of the reinforcing top cover 5 and tightly presses the weight increasing reinforcing top cover 5 onto the hammer body of the foundation hammer 7, and the socket bolts 3 vertically penetrate through the hoisting hoop 2 corresponding to the axle center position of the hoisting hoop 2, The neck of the foundation rammer 7 and the mushroom head hoisting screw 1 are fixedly connected;

in order to prolong the service life of the combined rammer, the outer ring surface of the weight increasing hammer piece 6, the outer ring surface and bottom surface exposed part of the foundation rammer 7 and the outer ring surface and bottom surface of the guide rammer 8 are respectively and fixedly provided with a wear-resistant reinforcing layer 9, and the weight increasing reinforcing top cover 5 and the wear-resistant reinforcing layer 9 are both made of wear-resistant manganese steel materials.

The structure and manufacturing and assembling method of each component of the combined hammer of the present invention will be described in detail by taking an embodiment of a certain preferred size as an example, as shown in fig. 4, the mushroom head hoisting screw 1 is made of Q235 steel, Q345B steel and 45# steel, and is selected according to the stock of materials, the mushroom head has a diameter of 300mm, a thickness of 150mm, the head is configured as an arc, the screw has a diameter of 147mm and a length of 2000mm, there are small holes with a diameter of 35mm at positions 390mm and 560mm away from the mushroom head, respectively, for the socket bolt 3 to pass through and fix, the screw thread has a length of 1300mm, the screw length can be lengthened appropriately, the screw thread can also be lengthened by 200mm to 300mm, the flexibility of later construction can be ensured, the screw is fixed on the foundation hammer 7, and is used for hoisting construction of the hammer to bear all the weight of the hammer; as shown in fig. 5-6, the hoisting hoop 2 is made of Q235 steel, and is composed of a reinforcing sleeve, a reinforcing steel ring and a reinforcing steel bar, the reinforcing sleeve is composed of a steel sleeve with a height of 440mm, an inner diameter of 420mm and an outer diameter of 460mm, and two reinforcing steel rings with an inner diameter of 460mm, an outer diameter of 580mm and a thickness of 20mm which are respectively welded on two sides of the sleeve, and 4 reinforcing steel bars are adopted for firm welding, the reinforcing steel bar is made of manganese steel and made of manganese steel plate leftover materials, the length is 40mm, the width is 20mm, the height is 400mm, and four reinforcing steel rings are welded on the hoisting hoop 2 in total, so that the stability of the hoop is increased, the hoisting hoop 2 is an auxiliary reinforcing member, no processing can be considered, the material can be selected and cast iron material can be used, red antirust paint is coated outside, and if the reinforcing member is not arranged, the socket bolt 3 needs to move down, so as to ensure the firm fixation of the weight-increasing reinforcing top cover 5; as shown in fig. 7, the socket bolt 3 is made of Q235 steel, the head of the socket bolt is made of a hexagonal body with a diameter of 70mm and a thickness of 30mm, the screw is a threadless rod with a diameter of 33mm and a length of 500mm, and the end of the socket bolt is provided with a socket small hole, and the socket bolt is used for fixing a mushroom head hoisting screw 1 and a hoisting hoop 2 on a hammer neck of a foundation rammer 7, mainly for connecting a weight increasing and reinforcing top cover 5, a weight increasing hammer sheet 6 and the foundation rammer 7 into a whole, and the end of the socket bolt is fixed by a fine socket wire without moving; as shown in fig. 8, the connecting bolt 4 is made of Q235 steel, the head is made of hexagonal body with diameter of 150mm and thickness of 66mm, the screw diameter is 100mm, the length is 1150mm, the screw thread length is 765mm, and the three connecting bolts 4 fix the weight-increasing reinforcing top cover 5 on the foundation rammer 7, so that all components are tightly combined to play a role of integral firmness; as shown in fig. 9-10, the weight-increasing reinforcing top cover 5 is made of manganese steel, and is composed of a circular exhaust hole 11, a welding manganese steel easy-to-lift hook 12, a connecting bolt hole and a top cover main body, the manganese steel easy-to-lift hook 12, the material is manganese steel, the material is made of manganese steel plate leftover materials, the height is 208mm, the bottom width is 140mm, the thickness is 30mm, four lifting hooks are welded on the upper part of the weight-increasing reinforcing top cover 5, the connecting bolt hole is 105mm in aperture, the top cover is formed by combining a truncated cone with the bottom diameter of 2350mm, the top diameter of 1000mm and the height of 400mm and a cylinder with the diameter of 2350mm and the height of 250mm, the whole body is made by reducing and processing the cylinder with the height of 650mm and the diameter of 2350mm, welding combination is not needed, the stability of the whole body is improved, a circular exhaust hole 11 with the diameter of 200mm is punched at a position 787mm away from the axis of the top part, the exhaust holes 11 are arranged in a regular triangle, and the corner of the inscribed regular triangle is punched with the connecting bolt hole with the diameter of 102 mm; as shown in fig. 11-12, the basic rammer 7 is made of iron, and is formed by integrating a cylinder with the diameter of 2150mm and the height of 1150mm and a cylinder with the diameter of 440mm and the height of 1275mm, and is shaped by cutting and processing the cylinder with the diameter of 2150mm and the height of 2425mm, and punching a circular exhaust hole 11 with the diameter of 200mm according to a designed position, wherein the hole depth is penetration, a connecting bolt hole with the diameter of 105mm is punched, and the hole depth is 550 mm; the guide rammer 8 is made of iron and is shaped into a cylinder with the diameter of 1100mm and the height of 900mm, the guide rammer 8 is welded at the bottom of the foundation rammer 7 and is reinforced and connected by a welded reinforcing support plate, the reinforcing support plate 10 is made of manganese steel, eight isosceles right-angled triangles with the side length of 200mm and the thickness of 20mm are made of manganese steel plate leftover materials, the foundation rammer 7 is effectively welded and connected with the guide rammer 8, and the reinforcing and stabilizing effects are achieved; the exhaust holes 11 are the exhaust holes 11 which need to be added on all the horizontal hammer body components, the diameter is 200mm, the positions of the three exhaust holes 11 are determined according to design data, the tamping force of the combined hammer is increased, and the hammer suction probability is reduced; in order to prolong the service life of the combined rammer, the outer ring surface of the weight increasing hammer piece 6, the outer ring surface and bottom surface exposed part of the foundation rammer 7 and the outer ring surface and bottom surface of the guide rammer 8 are fixedly provided with a layer of wear-resistant reinforcing layer 9, the material of the wear-resistant reinforcing layer 9 is manganese steel, the wear-resistant reinforcing layer 9 at the outer ring surface is made of a manganese steel plate through cold bending, the wear-resistant reinforcing layer 9 at the bottom surface is made of the manganese steel plate through cutting, the thickness of the wear-resistant reinforcing layer 9 is 100mm, and the wear-resistant reinforcing layer is welded and fixed with a reinforcing member to reduce the wear of the rammer.

During the specific assembly, the method can be carried out according to the following steps:

firstly, drawing a structural processing diagram of the special-shaped structural hammer by referring to the size of a common structural hammer used in dynamic compaction construction, and formulating the size of each component of the structural hammer according to the sizes of all nodes of the components in the processing diagram;

step two, manufacturing the foundation rammer 7 according to the processing detailed drawing size of the foundation rammer 7, and then welding the wear-resistant reinforcing layer 9 on the peripheral side and the bottom of the foundation rammer 7;

step three, manufacturing the weight increasing hammer sheet 6 according to the processing detailed size of the weight increasing hammer sheet 6, and then welding the wear-resistant reinforcing layer 9 on the peripheral side of the weight increasing hammer sheet 6;

step four, manufacturing the weight-increasing reinforcing top cover 5 according to the processing size shown in the figure, welding the lifting hook 12 on the weight-increasing reinforcing top cover 5 according to the positioning size, hoisting the weight-increasing hammer sheets 6 and the weight-increasing reinforcing top cover 5 with proper number to the hammer neck of the foundation rammer 7 completed in the step two, and connecting and reinforcing the weight-increasing reinforcing top cover 5 by the connecting bolt 4;

step five, inserting and fastening a mushroom head hoisting bolt 1, sleeving a hoisting hoop 2 and fixing firmly by using a socket bolt 3;

step six, finishing the processing of the guide rammer 8 according to the size shown in the figure, and then welding a wear-resistant reinforcing layer 9 on the peripheral side and the bottom of the guide rammer;

and step seven, welding the guide rammers 8 to the bottom of the foundation rammer 7 according to the designed positioning size, and welding the reinforcing support plate 10.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a combined dynamic compaction hammer of variable cross section which characterized in that: comprises a basic rammer (7) and a guide rammer (8), wherein the basic rammer (7) is in a convex shape, the bottom of the basic rammer is a cylindrical hammer body, a vertically extending hammer neck is integrally arranged at the middle part of the top end of the hammer body, a plurality of vertical through exhaust holes (11) are formed in the hammer body outside the hammer neck according to an annular array, the hammer neck is cylindrical, the axis of the hammer neck is collinear with the axis of the hammer body, the top of the hammer neck is cut into a round table shape, a mushroom head hoisting screw (1) which is coaxially arranged with the hammer neck is in threaded connection with the center position of the top of the hammer neck, the bottom end of the mushroom head hoisting screw (1) penetrates through the hammer neck and extends to a certain depth in the hammer body, the guide rammer (8) is cylindrical, the top end of the guide rammer (7) is fixedly connected at the center position of the bottom end of the hammer body, the axis of the mushroom head hoisting screw (1) is collinear with the axis of the hammer body, a plurality of reinforcing support plates (10) are fixedly arranged at the connection position of the basic rammer (8) and the basic rammer (7) according to the annular array, the cross section size of the hammer is smaller than that of the hammer body and larger than that of the hammer neck, and the section radius of the hammer is smaller than the shortest distance between the exhaust hole (11) and the axle center of the basic rammer (7).

2. The combined dynamic compactor of claim 1, wherein: the cover is equipped with weight gain reinforcement top cap (5) on the hammer neck of basic ram (7) hammer block top, weight gain reinforcement top cap (5) are including integrative two parts that link to each other, and its top bottom two parts are round platform form and cylindric respectively, and the axle center department of its top bottom two parts link up and set up with the cylindric through-hole of hammer neck size assorted, and the size phase-match of its bottom cylindrical external diameter and hammer block position cylinder, weight gain reinforcement top cap (5) link to each other with the hammer block is fixed according to connecting bolt (4) that annular array laid through a plurality of, exhaust hole (11) have been seted up to correspondence on its body, and exhaust hole (11) the axial alignment of seting up on exhaust hole (11) and the hammer block of seting up on its body.

3. The combined dynamic compactor of claim 2, wherein: the weight-increasing and reinforcing structure is characterized in that a plurality of weight-increasing hammer sheets (6) are sleeved on the hammer neck between the weight-increasing and reinforcing top cover (5) and the hammer body, the weight-increasing hammer sheets (6) are in a circular column shape, the inner diameter and the outer diameter of each weight-increasing hammer sheet are respectively matched with the size of the cylinder at the positions of the hammer neck and the hammer body, the weight-increasing hammer sheets (6) and the weight-increasing and reinforcing top cover (5) are sequentially stacked on the hammer body and fixedly connected with the hammer body through a plurality of connecting bolts (4) distributed according to an annular array, exhaust holes (11) are correspondingly formed in the two bodies, and the exhaust holes (11) formed in the two bodies are axially aligned with the exhaust holes (11) formed in the hammer body.

4. The combined dynamic compactor of claim 3, wherein: and the outer ring surface of the weight increasing hammer piece (6), the outer ring surface and bottom surface exposed part of the foundation rammer (7) and the outer ring surface and bottom surface of the guide rammer (8) are respectively and fixedly provided with a wear-resistant reinforcing layer (9), and the weight increasing reinforcing top cover (5) and the wear-resistant reinforcing layer (9) are made of the same material.

5. The combined dynamic compactor of claim 2, wherein: the weight-increasing and reinforcing device is characterized in that a hoisting hoop (2) is sleeved on a hammer neck above the weight-increasing and reinforcing top cover (5), the hoisting hoop (2) is fixedly connected with a mushroom head hoisting screw (1) and the hammer neck through a plurality of socket bolts (3), the bottom end of the hoisting hoop (2) is abutted against the top surface of the weight-increasing and reinforcing top cover (5) and tightly presses the weight-increasing and reinforcing top cover (5) on a hammer body of a foundation rammer (7), and the socket bolts (3) vertically penetrate through the hammer neck of the hoisting hoop (2), the foundation rammer (7) and the mushroom head hoisting screw (1) corresponding to the axle center of the hoisting hoop (2) and are fixedly connected with the three.

6. The combined dynamic compactor of claim 1, wherein: the reinforcing support plate (10) is a right-angle triangular plate made of wear-resistant materials, and the plate surfaces corresponding to two right-angle sides of the reinforcing support plate are respectively welded and fixed with the bottom surface of the hammer body of the foundation rammer (7) and the outer annular surface of the guide rammer (8).

7. The combined dynamic compactor of claim 5, wherein: the hoisting hoop (2) comprises a reinforcing sleeve closely attached to the outer wall of the hammer neck, two ends of the top end of the reinforcing sleeve are respectively welded and fixed with a reinforcing steel ring, and a plurality of reinforcing steel bars are welded and fixed on the outer wall surface of the reinforcing sleeve according to an annular array.

8. The combined dynamic compactor of claim 2, wherein: and a plurality of lifting hooks (12) are welded and fixed on the top of the weight increasing and reinforcing top cover (5) according to an annular array.

9. The combined dynamic compactor of claim 4, wherein: the foundation rammer (7), the guide rammer (8) and the weight increasing hammer piece (6) are all made of cast iron materials, and the weight increasing reinforcing top cover (5) and the wear-resisting reinforcing layer (9) are all made of manganese steel materials.