A powerful tamping hammer and a powerful tamping construction method that are easy to lift

Abstract

The present invention discloses a strong tamping hammer and a strong tamping construction method that are convenient for starting the hammer, comprising: a hammer body, a first exhaust channel is provided at the bottom of the hammer body, a second exhaust channel and a positioning groove are provided on the hammer body, a first exhaust hole connected to the first exhaust channel is provided on the lower hammer panel, a rebound device comprises a sleeve module, a limiting cylinder is provided in the top of the sleeve module, a rebound button is provided in the limiting cylinder, one end of a row claw sleeve is inserted into the rebound button, the middle part cooperates with the rebound button, and moves axially under the pushing action of the rebound button, the other end of the row claw sleeve is connected to a push rod, and the other end of the push rod is connected to a piston, a shoulder portion is provided on the push rod, an elastic connecting portion is provided between the shoulder portion and the inner wall bottom surface of the sleeve module, the piston blocks the first exhaust hole during the process of pressing the rebound button, and retracts into the positioning groove when the rebound button returns. The present invention can effectively solve the problem of being unable to start the hammer due to the hammer suction phenomenon in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of fastening equipment, and more specifically, relates to a strong compaction hammer that is easy to lift and a strong compaction construction method. Background Art

[0002] There are many methods for handling foundation earthwork, one of the most commonly used is the dynamic compaction method, which is to use a rammer with considerable weight to drop from a height through a lifting device, so as to use the rammer's own weight and impact force to compact the foundation soil, thereby achieving the effect of improving the foundation strength and stability. The safety and life of a building depend to a large extent on the performance of the foundation, so the compaction of the foundation must be taken seriously.

[0003] Chinese utility model patent CN209339119 discloses a rammer for strong tamping, including a main rammer and a secondary rammer located above the main rammer. The main rammer is provided with a plurality of guide rods, the secondary rammer is provided with a plurality of guide holes, the guide holes are slidably sleeved on the guide rods; the main rammer is provided with a main lifting ring, the main lifting ring is provided with a main sling, the secondary rammer is provided with a sliding hole, the main lifting ring passes through the sliding hole, the secondary rammer is provided with a secondary lifting ring, the secondary lifting ring is provided with a secondary sling, the secondary sling and the main sling are fixedly connected at one end away from the main rammer. Through the above arrangement, the utility model can lift the main and secondary rammers at the same time when lifting the sling, and the rammers fall twice to achieve the effect of stacking tamping.

[0004] The above patented technical solution still has the following shortcomings: in a poor geological environment, it is easy to produce a suction hammer phenomenon and the hammer cannot be started. It takes a lot of time and labor to manually start the hammer, which greatly reduces the work efficiency; it is impossible to measure the distance. When the tamping pit is too deep, it is not convenient to measure the tamping amount, which increases the difficulty in the construction process. In the process of compacting the foundation, different levels of strong compaction are required according to different geological conditions and processing requirements. At the same time, different tamping hammer qualities are required for different geological environments. The existing tamping hammers are often of fixed quality and cannot be adjusted, resulting in a limited range of use of the tamping hammer. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a strong compaction hammer and a strong compaction construction method which are easy to start the hammer. In combination with the characteristics of the rammer itself and the characteristics of its compaction process, an adjustable rammer which can effectively eliminate the suction hammer phenomenon is designed accordingly. The structures of its key components such as the hammer body, the lower hammer panel, the rebound device and the exhaust channel and their specific settings are studied and designed accordingly. Accordingly, the problem of being unable to start the hammer due to the suction hammer phenomenon in the prior art can be effectively solved. At the same time, it also has the advantages of simple operation and convenient adjustment. Therefore, it is particularly suitable for applications where the geology is relatively soft and the humidity is high and suction hammer is easily caused.

[0006] To achieve the above object, according to one aspect of the present invention, a powerful tamping hammer that is easy to start is provided, comprising:

[0007] A hammer body, wherein a first exhaust channel is provided at the bottom of the hammer body, and a plurality of second exhaust channels and positioning grooves are provided on the hammer body along the axis of the hammer body, wherein the first exhaust channel is connected to the second exhaust channel;

[0008] a lower hammer panel disposed at the bottom of the hammer body, wherein the lower hammer panel is provided with a first exhaust hole connected to the first exhaust channel, and the first exhaust hole is arranged in a one-to-one correspondence with the positioning groove; and

[0009] A rebound device is arranged in the positioning groove, and the rebound device includes a detachably connected sleeve module, a limiting cylinder is provided in the top of the sleeve module, and a rebound button is provided in the limiting cylinder, one end of the claw sleeve is inserted into the rebound button, the middle part of which cooperates with the rebound button and moves axially under the pushing action of the rebound button, and also provides force for the rebound button to move circumferentially along the claw sleeve, the other end of the claw sleeve is connected with the push rod, and the end of the push rod not connected with the claw sleeve is provided with an elastic connecting part, the elastic connecting part passes through the sleeve module and is connected to the piston, a shoulder part is provided on the elastic connecting part, and an elastic part is provided between the shoulder part and the bottom surface of the inner wall of the sleeve module, the piston blocks the first exhaust hole during the process of pressing the rebound button, and retracts into the positioning groove when the rebound button returns, so that the first exhaust hole, the first exhaust channel and the second exhaust channel are connected.

[0010] As a further preferred embodiment, the sleeve module includes a front section of a limit cylinder, which includes limit claw assemblies arranged at circumferential intervals, and the gaps between adjacent limit claw assemblies form a first claw positioning area, and each limit claw assembly includes a second claw positioning area, a third claw positioning area, and a fourth claw positioning area, wherein the ends of the second claw positioning area and the third claw positioning area are continuous bevel cuts, the third claw positioning area is an axially arranged groove, the end of the fourth claw positioning area is a bevel cut, and the axial length of the fourth claw positioning area is greater than the axial length of the third claw positioning area.

[0011] As a further preferred embodiment, the rebound button includes a button front section, a button slider arranged circumferentially along the button front section, and a push angle arranged circumferentially along the bottom of the button front section. The button slider and the push angle are arranged in a one-to-one correspondence, and the button slider is movably engaged in the first claw engagement area.

[0012] As a further preference, the top moving angle is provided with a first top cut surface and a second top cut surface which are symmetrically arranged.

[0013] As a further preferred embodiment, the rowing claw sleeve includes a rear end of the rowing claw, a rowing claw rod and a front section of the rowing claw, the rear end of the rowing claw is fixedly connected to the front section of the rowing claw, the rowing claw rod is arranged along the circumference of the front section of the rowing claw and one end of the rowing claw rod is fixedly connected to the rear end of the rowing claw, and the rowing claw rod slides along the groove of the first rowing claw positioning area or the third rowing claw positioning area under the push of the top moving angle.

[0014] As a further preference, a rowing claw head is provided at the end of the rowing claw rod, and the inclined surface of the rowing claw head is parallel to the first top section surface or the second top section surface.

[0015] As further preferred, the sleeve module includes a limiting cylinder, a first mounting cylinder and a second mounting cylinder which are arranged in sequence, the limiting cylinder is arranged in the positioning groove, the first mounting cylinder is connected to the limiting cylinder by a thread, the second mounting cylinder is connected to the first mounting cylinder by a thread, the elastic connecting part passes through the second mounting cylinder and is connected to the piston, and the elastic member is arranged between the bottom inner wall of the second mounting cylinder and the shoulder portion.

[0016] As further preferred, the elastic member includes a spring, and the spring is in a natural or compressed state when the piston is located in the positioning groove, and when the piston is located in the first exhaust hole, the spring does not reach a limit compression state.

[0017] As a further preferred embodiment, it further comprises an upper hammer cover plate, which is arranged on the top of the hammer body, and

[0018] The protrusion is arranged on the hammer cover plate, and the hammer cover plate is also provided with a distance measuring device and a lifting hook.

[0019] According to another aspect of the present invention, there is also provided a strong tamping construction method using a tamping hammer, comprising:

[0020] Step 1: Lift the rammer and initialize the piston of the rebound device to the extended state, that is, push the piston into the first exhaust hole, and record the initial height of the rammer;

[0021] Step 2: Release the rammer and let it fall freely, so that the lower hammer panel contacts the ground, measure the rammer drop distance, and calculate the tamping amount based on the rammer initial height and the rammer drop distance;

[0022] Step 3: Press the rebound button to retract the piston into the positioning groove, so that the first exhaust hole, the first exhaust channel and the second exhaust channel are connected;

[0023] Step 4: Repeat the above steps until the average of the last two tamping amounts is less than the specified value, then backfill the tamping pit and move to the next tamping point for construction.

[0024] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0025] 1. The present invention studies and designs the structures of key components such as the hammer body, the lower hammer panel, the rebound device and the exhaust channel and their specific settings, which can effectively solve the problem of being unable to start the hammer due to the suction hammer phenomenon in the prior art. At the same time, it also has the advantages of simple operation and convenient adjustment. Therefore, it is particularly suitable for applications where the geology is relatively soft and the humidity is high and suction hammer is easily caused.

[0026] 2. The present invention can improve the smoothness of the exhaust passage of the rammer and reduce the rammer suction phenomenon.

[0027] 3. The present invention ensures that the exhaust channel can still operate normally after a single channel is blocked through the combination of the upper and lower exhaust channels and the transverse exhaust channel.

[0028] 4. The present invention measures the drop distance of the rammer through a distance measuring device and calculates the average tamping amount between every two hits. At the same time, the weight of the rammer can be adjusted by adjusting the counterweight of the lower hammer panel to increase the use range of the rammer.

[0029] 5. The present invention does not have high requirements on the construction conditions of dynamic compaction, and effectively reduces the construction limitations of most devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of a powerful tamping hammer that is easy to start hammering according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the overall installation of a powerful tamping hammer that is easy to lift according to an embodiment of the present invention;

[0032] Figure 3 It is a partial enlarged view of a first construction state of a strong compaction hammer that is easy to start hammering according to an embodiment of the present invention;

[0033] Figure 4 It is a schematic diagram of the overall structure of a rebound device of a strong compaction hammer that is convenient for starting the hammer according to an embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the overall installation of a rebound device of a strong compaction hammer that is convenient for starting the hammer according to an embodiment of the present invention;

[0035] Figure 6 It is a schematic diagram of the structure of a claw sleeve of a strong tamping hammer rebound device that is convenient for starting the hammer according to an embodiment of the present invention;

[0036] Figure 7 A schematic diagram of the structure of a rebound button of a rebound device for a tamping hammer that facilitates the lifting of the hammer according to an embodiment of the present invention;

[0037] Figure 8 It is a schematic diagram of the structure of a limiting cylinder of a strong compaction hammer rebound device that is convenient for starting the hammer according to an embodiment of the present invention;

[0038] Fig. 9 It is a schematic structural diagram of a limiting portion of a limiting cylinder of a strong tamping hammer rebound device that is convenient for starting the hammer according to an embodiment of the present invention;

[0039] Fig.10 It is a schematic diagram of a first motion state of a strong compaction hammer that is convenient for starting the hammer according to an embodiment of the present invention;

[0040] Fig.11 It is a schematic diagram of a second motion state of a strong tamping hammer that is convenient for starting the hammer according to an embodiment of the present invention;

[0041] Fig.12 It is a schematic diagram of a third motion state of a strong tamping hammer that is convenient for starting the hammer according to an embodiment of the present invention;

[0042] Fig.13 It is a schematic diagram of a fourth motion state of a strong tamping hammer that is convenient for starting the hammer according to an embodiment of the present invention;

[0043] Fig.14 It is a schematic diagram of a fifth motion state of a strong compaction hammer that is convenient for starting the hammer according to an embodiment of the present invention;

[0044] Fig.15 A strong compaction construction method using a strong compaction hammer that is easy to lift is disclosed in an embodiment of the present invention;

[0045] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-lower hammer panel, 101-first exhaust hole, 2-hammer body, 201-first exhaust channel, 202-positioning groove, 203-second exhaust channel, 3-upper hammer cover, 301-bump, 302-distance measuring device, 303-lifting hook, 4-rebound device, 410-limiting cylinder, 411-rear end section of limiting cylinder, 412-middle section of limiting cylinder, 413-front section of limiting cylinder, 4131-first claw clamping area, 4132-second claw clamping area Area, 4133-third claw locking area, 4134-fourth claw locking area, 414-front section of the limiting part, 420-rebound button, 421-front section of the button, 422-pushing angle, 423-button slider, 430-claw sleeve, 431-front section of the claw, 432-claw rod, 433 claw head, 434-rear end of the claw, 440-pushing rod, 450-first mounting cylinder, 460-elastic connecting part, 461-spring, 462-shaft shoulder, 470-second mounting cylinder, 471-bottom panel, 480-piston. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] like Figure 1-Figure 14 As shown, a powerful tamping hammer for easy starting of the hammer of the present invention comprises a lower hammer panel 1, a hammer body 2 and an upper hammer cover plate 3 which are connected in sequence. The lower hammer panel 1, the hammer body 2 and the upper hammer cover plate 3 are detachably connected. However, when the three are connected, the overall structural strength can be guaranteed, that is, the reaction force of the ground during the compaction process can be resisted. In one embodiment of the present invention, a plurality of first exhaust holes 101 are provided on the lower hammer panel 1. At the same time, a first exhaust channel 201 is reserved at the connection between the lower hammer panel 1 and the bottom surface of the hammer body 2. The plurality of first exhaust holes 101 are connected to the first exhaust channel 201. A plurality of positioning grooves 202 and a second exhaust channel 203 are provided on the hammer body 2. A rebound device 4 is provided in the positioning groove 202. In the present invention, the rebound device 4 is used to block the first exhaust hole 101 when the tamping hammer is compacting the ground, and retract into the positioning groove 202 when the tamping hammer is starting, so that the first exhaust hole 101, the first exhaust channel 201 and the second exhaust channel 203 are connected, so as to eliminate the suction force of the tamping hammer adsorbed to the ground after compaction.

[0048] In order to achieve that the rebound device 4 blocks the first exhaust hole 101 during tamping and retracts into the positioning groove 202 after tamping, the present invention makes a specific design for the rebound device 4. Specifically, the number of the rebound devices 4 is the same as the number of the first exhaust holes 101. The rebound device 4 includes a limiting cylinder 410. In one embodiment of the present invention, the limiting cylinder 410 is interference fit or sealed with the positioning groove 202. The limiting cylinder 410 includes a limiting cylinder rear end section 411, a limiting cylinder middle section 412 and a limiting cylinder front section 413, all of which are hollow structures and integrally formed. The limiting cylinder rear end section 411 is provided with a thread, which is connected to the first mounting cylinder 450 through the thread. The top end of the limiting cylinder middle section 412 is clamped on the mounting hole provided on the upper hammer cover plate 3, and the bottom end thereof extends into the positioning groove 202. The front section 413 of the limiting cylinder is fixedly arranged in the middle section 412 of the limiting cylinder, and is arranged at the top of the middle section 412 of the limiting cylinder, and is arranged concentrically with the middle section 412 of the limiting cylinder. A rebound button 420 is arranged in the front section 413 of the limiting cylinder, and the rebound button 420 is a force input end, and its bottom is limitedly engaged with the front section 413 of the limiting cylinder, and its top extends to the top of the middle section 412 of the limiting cylinder, and the distance it extends is at least greater than the travel distance of the rebound device 4 to completely block the first exhaust hole 101. The rebound button 420 includes a button front section 421, a button slider 423 arranged circumferentially along the outer wall of the button front section 421, and a top moving angle 422 arranged radially along the bottom surface of the button front section 421, and each button slider 423 corresponds to a top moving angle 422. Correspondingly, the front section 413 of the limiting cylinder includes a limiting cylinder front section 413 and a limiting portion front section 414 that are integrally connected, the limiting cylinder front section 413 includes a plurality of limiting claw assemblies arranged at intervals, the gaps between adjacent limiting claw assemblies form a first claw positioning area 4131, each limiting claw assembly includes a second claw positioning area 4132, a third claw positioning area 4133, and a fourth claw positioning area 4134, wherein the ends of the second claw positioning area 4132 and the third claw positioning area 4133 are continuous bevel cuts, the third claw positioning area 4133 is an axially arranged groove, the end of the fourth claw positioning area 4134 is a bevel cut, and the axial length of the fourth claw positioning area 4134 is greater than the axial length of the third claw positioning area 4133. During the movement coordination process, a button slider 423 is disposed in each of the first and third paddling claw positioning areas 4131 and 4133, that is, when downward pressure is applied to the button front section 421, the button slider 423 slides downward along the first and third paddling claw positioning areas 4131 and 4133. Furthermore, a paddling claw sleeve 430 is disposed in coordination with the limiting cylinder front section 413, and the paddling claw sleeve 430 is movably disposed in the limiting cylinder middle section 412 and can move along the axial direction of the limiting cylinder middle section 412.The rowing claw sleeve 430 includes an integrally formed rowing claw rear end 434 and a rowing claw front section 431. The diameter of the rowing claw rear end 434 is larger than that of the rowing claw front section 431. A rowing claw rod 432 is circumferentially arranged on the outer wall of the rowing claw front section 431. The sum of the thickness of the rowing claw rod 432 and the radius of the rowing claw front section 431 is just equal to the radius of the rowing claw rear end 434. A rowing claw head 433 is arranged at the end of the rowing claw rod 432. The rowing claw head 433 is a specially arranged oblique cut. The rowing claw rod 432 extends into the first rowing claw clamping area 4131 and abuts against the top moving angle 422 arranged in the first rowing claw clamping area 4131. In the embodiment of the present invention, by applying a downward pushing force to the button front section 421 to push the button slider 423 to move downward along the first claw locking area 4131, when the pushing angle 422 pushes the claw rod 432 to move downward to the inclined cut of the third claw locking area 4133, the first top cut surface or the second top cut surface of the pushing angle 422 continues to push along the inclined cut of the claw head 433, pushing the claw rod 432 to the connection between the third claw locking area 4133 and the fourth claw locking area 4134. At this time, the downward pushing force of the button front section 421 is stopped, the claw rod 432 is stopped at the end of the third claw locking area 4133, and stops rotating under the limiting action of the fourth claw locking area 4134.

[0049] Furthermore, the bottom surface of the rowing claw sleeve 430 is connected to the push rod 440, and the push rod 440 passes through the limiting cylinder 410. The first installation cylinder 450 is a circular hollow structure, and the outer walls of both ends thereof are provided with threads, one end of which is threadedly connected to the rear end section 411 of the limiting cylinder, and the other end of which is threadedly connected to the second installation cylinder 470. In the present invention, the outer diameter of the second installation cylinder 470 is the same as the diameter of the positioning groove 202. The push rod 440 extends into the first mounting cylinder 450 and is connected to the elastic connecting portion 460 (hereinafter referred to as the connecting portion 460). One end of the connecting portion 460 is connected to the push rod 440, and the other end extends to the outside of the bottom surface of the second mounting cylinder 470 and is connected to the piston 480. A shoulder portion 462 is provided on the connecting portion 460, and a spring 461 is also sleeved on the connecting portion 460. The spring 461 is provided between the shoulder portion 462 and the bottom surface of the second mounting cylinder 470. In this way, under the action of thrust, the push rod 440 pushes the shoulder portion 462 to compress the spring 461, and the piston 480 continues to move downward.

[0050] Furthermore, in the present invention, an upper hammer cover plate 3 is arranged on the top of the hammer body 2 , and a protrusion 301 is arranged on the hammer cover plate 3 . The hammer cover plate 3 is also provided with a distance measuring device 302 and a lifting hook 303 .

[0051] In the above embodiment, the specific working process of the rammer is as follows:

[0052] The button front section 421 is pushed, so that the button slider 423 pushes the paddling claw head 433 to slide downward along the first paddling claw positioning area 4131 until the paddling claw head 433 slides out of the first paddling claw positioning area 4131. At this time, the button front section 421 is continuously pressed, and the push angle 422 continues to push the paddling claw head 433 along the oblique surface of the paddling claw head 433, so that the paddling claw head 433 moves along the oblique surface where the second paddling claw positioning area 4132 and the third paddling claw positioning area 4133 are located. The paddling claw head 433 slides and stops applying the thrust. Under the rebound force of the spring 461, the chamfered surface of the paddling claw head 433 continues to slide on the chamfered surface where the second paddling claw locking area 4132 and the third paddling claw locking area 4133 are located until the paddling claw head 433 stops on the side wall of the fourth paddling claw locking area 4134. At this time, the paddling claw rear end 434 pushes the push rod 440, the connecting part 460 and the piston 480 in sequence to move until the piston 480 completely blocks the first exhaust hole 101.

[0053] Lift the rammer to a specified height and record the height as the initial height;

[0054] Drop the hammer, so that the rammer falls freely to the specified position, and record the tamping height position of the rammer;

[0055] Apply thrust to the button front section 421, so that the connecting part 460 continues to compress the spring, and the top moving angle 422 located in the groove of the third claw locking area 4133 continues to push the claw head 433 downward, so that the claw head 433 moves to the bottom end of the four claw locking areas 4134, and then rotate the button front section 421 to make the claw head 433 slide into the first claw locking area 4131 closest to it, and release the button front section 421. Under the action of the restoring force of the spring, the claw head 433 pushes the button slider 423 to move to the top end along the first claw locking area 4131, and the piston 480 retracts into the positioning groove 202. At this time, the first exhaust hole 101, the first exhaust channel 201 and the second exhaust channel 203 are connected, and the suction between the ground and the rammer is released;

[0056] Repeat the above steps until the average tamping amount is less than the specified value, backfill the tamping pit, and move to the next tamping point for construction.

[0057] In a preferred embodiment of the present invention, eight button sliders 423 are evenly spaced along the circumference of the outer wall of the front section of the button. Correspondingly, four claw rods 432 are provided, and four limiting claw assemblies are provided to form four first claw locking areas 4131. The continuous inclined cuts formed on the bottom end surfaces of the second claw locking area 4132 and the third claw locking area 4133 cooperate with the inclined surface of the claw head 433, so that when the pushing angle 422 pushes the claw head 433 out of the first claw locking area 4131, it can slide toward the inclined surface.

[0058] In a preferred embodiment of the present invention, when the claw head 433 is pushed to the bottom end of the fourth claw locking area 4134, a certain margin is left between the bottom surface of the piston 480 and the bottom surface of the first exhaust hole 101 to avoid obstruction of the rotation and pushing process of the button front section 421.

[0059] In a preferred embodiment of the present invention, the second paddling claw locking area 4132 is far away from the side connected to the fourth paddling claw locking area 4134, and its axial length is the same as the axial length of the fourth paddling claw locking area 4134. More specifically, the axial length of the side connected to the third paddling claw locking area 4133 and the fourth paddling claw locking area 4134 is smaller than the axial length of the fourth paddling claw locking area 4134, so as to form a continuous inclined cut, so that the fourth paddling claw locking area 4134 forms a paddling claw that restricts the paddling claw head 433 from continuing to move or rotate.

[0060] In a preferred embodiment of the present invention, in order to realize the intelligent control of the rammer, a vertically arranged fixed seat is provided on the upper hammer cover plate 3, and a slide groove and a hydraulic rod are provided on the fixed seat. The hydraulic rod is fixedly connected to the fixed seat, and the power output shaft of the hydraulic rod is parallel to the slide groove. A sliding block is provided on the slide groove, and the hydraulic rod pushes the sliding block to move along the slide groove. A rotating motor is fixedly provided on the sliding block, and the power output shaft of the rotating motor is connected to the rebound button 420 to drive the rebound button 420 to rotate. Further, the rammer involved in the present invention also includes a control module, and the control module is connected to the hydraulic rod and the rotating motor through a communication component. In this way, when the rammer is compacting a deep pit, it is inconvenient for personnel to operate, and it can be remotely operated through the control module. Further, in the present invention, the control module can be directly changed according to the advancement process and rotation angle of the rebound button 420, and personnel can directly operate the control module to realize remote intelligent control of the rammer.

[0061] In a preferred embodiment of the present invention, the weight of the lower hammer panel is adjustable, that is, a plurality of standard parts with different weights can be provided.

[0062] In another embodiment of the present invention, Figure 1-Figure 14As shown, a powerful tamping hammer that is easy to start hammering includes: a hammer body 2, including a hammer body 2, the upper and lower ends of the hammer body 2 are detachably connected to the hammer cover plate 3 and the hammer panel 1, respectively, and the detachable connection can be a bolt connection. The hammer panel 1 is provided with one or more exhaust holes 101; the hammer body 2 is provided with an exhaust channel 201 and a positioning groove 202 corresponding to the first exhaust hole 101, and the positioning groove 202 is used to clamp the positioning rebound device 4; there is an exhaust channel 201 between the upper surface of the hammer panel 1 and the lower surface of the hammer body 2, and the exhaust channel 201 is fully connected with the first exhaust hole 101 and the second exhaust hole 203, and the continuity of the exhaust hole 101 and the exhaust channel 201 can be controlled by the rebound device 4; a protrusion 301 is fixedly provided at the middle position of the upper surface of the hammer cover plate 3, and a distance measuring device 302 and a lifting hook 303 are fixedly provided on the protrusion 301.

[0063] like Figure 4 , Figure 5 As shown, an embodiment of the rebound device 4 is shown, in order to clearly show the internal structure, such as Figure 6 As described above, after assembling the three parts B1, B2, and B3 shown in the figure separately, install B2 into the limiting cylinder 410 from bottom to top, and then install and position the B3 part with the B2 part from bottom to top. The B1 part is the limiting cylinder 410, and together with the B2 part, it forms a rowing claw mechanism, and the B3 part can provide a rebound force for the rowing claw mechanism in the rebound state.

[0064] Specifically, Figure 5-Figure 9 As shown, the rebound button 420 includes a button front section 421 and a button rear section, and the button rear section is provided with a button slider 423 and a pushing feeler 422, and the pushing feeler 422 is used to push the paddling claw head 433 so that the paddling claw 433 slides into the next paddling claw positioning area; the limiting cylinder 410 includes a limiting cylinder rear section 411, a limiting cylinder middle section 412 and a limiting cylinder front section 412, and the cylinder rear section 411 is used to be threadedly connected to the second mounting cylinder 470, and the limiting cylinder middle section 412 is used to provide a certain activity space, and the limiting cylinder front section 412 is fixedly connected to the limiting portion, and the limiting portion, such as Fig.10 As shown, the limiting portion includes a front section 414 and a rear section, and the limiting portion is a hollow structure. The rear section is provided with a first paddling claw clamping area 4131, a second paddling claw clamping area 4132, a third paddling claw clamping area 4133, and a fourth paddling claw clamping area 4134 which are sequentially and cyclically provided for clamping and limiting with a paddling claw head 433 fixedly provided on a paddling claw sleeve 430.

[0065] During installation, first, the rebound button 420 needs to be installed into the limiting cylinder 410, and the button slider 423 needs to be slidably connected with the hollow grooves on the inner walls of the first and third rowing claw clamping areas 4131 and 4133, and at the same time used to limit the circumferential rotation of the rebound button 420, so that the rebound button 420 can move axially in the limiting part. Then, the limiting cylinder front section 413 of the rowing claw sleeve is installed into the central through hole of the limiting part, and the rowing claw front section 431 is inserted into the central cylinder of the rebound button 420.

[0066] When the initial installation is performed and the rebound button 420 is not pressed, the push-up feeler 422 does not exceed the front end surface of the four paddling claw positioning areas of the limiting portion, and the paddling claw head 433 fixedly arranged on the paddling claw cover 430 slides into the first paddling claw positioning area 4131. Fig.11 The following figure shows the above-mentioned installation status.

[0067] The end surface of the rear section 434 of the paddling claw is in direct contact with the upper end surface of the push rod 440, the lower end surface of the push rod 440 is in direct contact with the upper end surface of the connecting portion 460, and the lower end surface of the connecting portion 460 is engaged with the connecting shaft on the piston 480 for positioning. Figure 3 As shown, the connecting portion 460 is provided with a shoulder portion 462 near the upper end, a spring 461 is installed below the shoulder portion 462, and the lower end surface of the shoulder portion 462 is in direct contact with the spring 461, and the other end of the spring 461 is in direct contact with a bottom panel 471 on the second mounting cylinder 470 spirally connected below the first mounting cylinder 450, and the bottom panel 471 is a hollow structure for passing through the connecting portion 460.

[0068] In order to clearly explain the working principle of the rebound device, Figure 11-Figure 15 As shown, 5 working states are shown, such as Fig.11 As shown, this is a state diagram of initial installation when the rebound button 420 is not pressed. At this time, the pushing feeler 422 retracts into the hollow groove on the inner wall of the first claw positioning area 4131 and the third claw positioning area 4133, and under the action of the spring 461, the claw sleeve 430 maintains contact with the pushing feeler 422, so that the piston 480 under the connecting part 460 is in a retracted state.

[0069] like Fig.11 As shown, when the pop-up button 420 is pressed, the pushing feeler 422 is driven to slide forward in the hollow grooves on the inner walls of the first claw locking area 4131 and the third claw locking area 4133, so that the pushing feeler 422 pushes the claw head 433 out of the third claw locking area 4133. The figure shows a critical state in which the claw head 433 is pushed out but has not yet been moved away.

[0070] like Fig.12As shown, when the rebound button 420 continues to be pressed downward, the pushing tentacles 422 completely push the paddling claw head 433 out of the third paddling claw positioning area 4133, and then under the action of the spring 461, the paddling claw head 433 moves forward, thereby paddling to the second paddling claw positioning area 4132. When the rebound button 420 is released, the paddling claw head 433 is paddled from the second paddling claw positioning area 4132 to the third paddling claw positioning area 4133, thereby making the piston 480 in an extended state.

[0071] like Fig.13 As shown, when the rebound button 420 is pressed again, the pushing feeler 422 slides out of the hollow groove again, and causes the pushing feeler 422 to directly contact the paddling claw head 433. When the rebound button 420 continues to be pressed downward, the paddling claw head 433 moves downward under the pushing of the pushing feeler 422, thereby pushing the paddling claw head 433 out of the third paddling claw positioning area 4133. The figure shows the critical state of the paddling claw head 433 before sliding into the fourth paddling claw positioning area 4134.

[0072] like Fig.14 As shown, when the rebound button 420 continues to be pressed downward, the pushing tentacles 422 completely push the paddling claw head 433 out of the third paddling claw positioning area 4133, and under the action of the spring 461, the paddling claw head 433 is moved to the fourth paddling claw positioning area 4134. At this time, the rebound button 420 is released, so that the paddling claw head 433 is moved into the first paddling claw positioning area 4131 of the next group. At this point, the piston 480 is in a retracted state again.

[0073] Before the rammer falls, the piston 480 in the rebound device 4 is in an extended state. Figure 3 In the state shown, the piston 480 penetrates deep into the first exhaust hole 101, thereby blocking the exhaust channel 201 and the first exhaust hole 101, thereby preventing soil from entering the interior of the rammer and causing blockage when the rammer is dropped and compacted.

[0074] When the piston 480 in the rebound device 4 is in the retracted state, as shown in FIG. Figure 4 In the state shown, the first exhaust hole 101 is connected to the exhaust channel 201. When the rammer contacts the foundation surface, air can pass through the second exhaust hole 203, the exhaust channel 201, and the first exhaust hole 101 to the gap between the rammer and the ground, thereby preventing the occurrence of the suction hammer phenomenon.

[0075] The present invention can more accurately judge the drop distance and tamping amount of the rammer through the distance measuring device. The opening and closing state of the rebound device can improve the smoothness of the rammer exhaust channel and reduce the rammer suction phenomenon. By adjusting the bottom plate counterweight, the weight of the rammer is adjusted to increase the use range of the rammer. The device does not have high requirements on the construction conditions of strong tamping, and effectively reduces the construction limitations of most devices.

[0076] like Fig.15 As shown, a dynamic compaction construction method using a dynamic compaction hammer that is easy to start the hammer according to an embodiment of the present invention comprises the following steps:

[0077] S100: lifting the rammer by a crane so that the gravitational potential energy of the rammer reaches the design rammering energy requirement, initializing the piston of the rebound device to an extended state, and recording the current height by a distance measuring device;

[0078] S200: the lifting device is released, so that the rammer falls freely, so that the lower hammer panel contacts the ground, and the current height is recorded by a distance meter, and the height is subtracted from the first recorded height to obtain the sum of the rammer falling and the compacted amount, and then the compacted amount is obtained;

[0079] S300: Press the rebound button to make the piston of the rebound device retracted, and air enters the gap between the rammer and the ground from the second exhaust hole, the exhaust channel and the first exhaust hole.

[0080] S400: The lifting device lifts the rammer to a specified height again, so that the gravitational potential energy of the rammer reaches the design rammering energy requirement, and the rebound button is pressed again, so that the piston of the rebound device is in an extended state;

[0081] S500: The lifting device is released again, allowing the rammer to fall freely. When the average tamping amount of the last two blows is less than the specified value, the ramming pit is backfilled and the construction is moved to the next ramming point.

[0082] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A powerful tamping hammer that is easy to start, characterized in that: include: A hammer body (2), wherein a first exhaust channel (201) is provided at the bottom of the hammer body (2), and a plurality of second exhaust channels (203) and positioning grooves (202) are provided on the hammer body (2) and are arranged along the axis of the hammer body (2), wherein the first exhaust channel (201) is in communication with the second exhaust channel (203); A lower hammer panel (1) is arranged at the bottom of the hammer body (2), wherein the lower hammer panel (1) is provided with a first exhaust hole (101) communicating with the first exhaust channel (201), and the first exhaust hole (101) and the positioning groove (202) are arranged in a one-to-one correspondence; and A rebound device (4) is arranged in the positioning groove (202), and the rebound device (4) includes a detachably connected sleeve module, a limiting cylinder (410) is arranged in the top of the sleeve module, and a rebound button (420) is arranged in the limiting cylinder (410), one end of the paddling claw sleeve (430) is inserted into the rebound button (420), and the middle part cooperates with the rebound button (420) and moves axially under the pushing action of the rebound button (420), and also provides the rebound button (420) with the circumferential movement of the paddling claw sleeve (430), and the other end of the paddling claw sleeve (430) is connected to the push rod (440), and the push rod (440) is not connected to the paddling claw sleeve (430). An elastic connection part (460) is provided at one end of the claw sleeve (430), and the elastic connection part (460) passes through the sleeve module and is connected to the piston (480). A shoulder part (462) is provided on the elastic connection part (460), and an elastic member is provided between the shoulder part (462) and the bottom surface of the inner wall of the sleeve module. The piston (480) blocks the first exhaust hole (101) when the rebound button (420) is pressed down, and retracts into the positioning groove (202) when the rebound button (420) returns to its position, so that the first exhaust hole (101), the first exhaust channel (201) and the second exhaust channel (203) are connected.

2. A powerful tamping hammer that is easy to start hammering according to claim 1, characterized in that: The sleeve module comprises a limiting cylinder front section (413), the limiting cylinder front section (413) comprises limiting claw assemblies arranged at intervals, the gaps between adjacent limiting claw assemblies form a first claw clamping area (4131), each limiting claw assembly comprises a second claw clamping area (4132), a third claw clamping area (4133), and a fourth claw clamping area (4134), wherein the ends of the second claw clamping area (4132) and the third claw clamping area (4133) are continuous bevel cuts, the third claw clamping area (4133) is an axially arranged groove, the end of the fourth claw clamping area (4134) is a bevel cut, and the axial length of the fourth claw clamping area (4134) is greater than the axial length of the third claw clamping area (4133).

3. A powerful tamping hammer that is easy to start hammering according to claim 2, characterized in that: The rebound button (420) comprises a button front section (421), a button slider (423) arranged circumferentially along the button front section (421), and a push angle (422) arranged circumferentially along the bottom of the button front section (421), the button slider (423) and the push angle (422) being arranged in a one-to-one correspondence, and the button slider (423) is movably engaged in the first claw engaging area (4131).

4. A powerful tamping hammer that is easy to start hammering according to claim 3, characterized in that: The top moving angle (422) is provided with a first top cut surface and a second top cut surface which are symmetrically arranged.

5. A powerful tamping hammer that is easy to start hammering according to claim 4, characterized in that: The paddling claw sleeve (430) comprises a paddling claw rear end (434), a paddling claw rod (432) and a paddling claw front section (431); the paddling claw rear end (434) is fixedly connected to the paddling claw front section (431); the paddling claw rod (432) is arranged along the circumference of the paddling claw front section (431) and one end of the paddling claw rod (432) is fixedly connected to the paddling claw rear end (434); and the paddling claw rod (432) slides along the groove of the first paddling claw clamping area (4131) or the third paddling claw clamping area (4133) under the push of the jacking angle (422).

6. A powerful tamping hammer that is easy to start hammering according to claim 5, characterized in that: A rowing claw head (433) is provided at the end of the rowing claw rod (432), and the inclined surface of the rowing claw head (433) is parallel to the first top section surface or the second top section surface.

7. A powerful tamping hammer that is easy to start hammering according to any one of claims 1 to 6, characterized in that: The sleeve module includes a limiting cylinder (410), a first mounting cylinder (450) and a second mounting cylinder (470) which are arranged in sequence, the limiting cylinder (410) is arranged in the positioning groove (202), the first mounting cylinder (450) is connected to the limiting cylinder (410) by a thread, the second mounting cylinder (470) is connected to the first mounting cylinder (450) by a thread, the elastic connecting portion (460) passes through the second mounting cylinder (470) and is connected to the piston (480), and the elastic member is arranged between the bottom inner wall of the second mounting cylinder (470) and the shaft shoulder portion (462).

8. The strong tamping hammer that is easy to start hammering according to claim 7 is characterized in that: The elastic member comprises a spring (461), which is in a natural or compressed state when the piston (480) is located in the positioning groove (202), and does not reach the limit compression state of the spring (461) when the piston (480) is located in the first exhaust hole (101).

9. The powerful tamping hammer that is easy to start hammering according to claim 7, characterized in that: It also includes an upper hammer cover plate (3) disposed on the top of the hammer body (2), and The convex block (301) is arranged on the hammer cover plate (3), and the hammer cover plate (3) is also provided with a distance measuring device (302) and a lifting hook (303).

10. A tamping construction method using a tamping hammer, characterized in that: The method is implemented by using the rammer as claimed in any one of claims 1 to 9, comprising: Step 1: Lift the rammer and initialize the piston (480) of the rebound device (4) to an extended state, that is, push the piston (480) into the first exhaust hole (101), and record the initial height of the rammer; Step 2: Release the rammer and let it fall freely, so that the lower hammer panel (1) contacts the ground, measure the rammer drop distance, and calculate the compaction amount based on the rammer initial height and the rammer drop distance; Step 3: Press the rebound button (420) to make the piston (480) retract into the positioning groove (202), so that the first exhaust hole (101), the first exhaust channel (201) and the second exhaust channel (203) are connected; Step 4: Repeat the above steps until the average of the last two tamping amounts is less than the specified value, then backfill the tamping pit and move to the next tamping point for construction.

Images