CN214061723U - Low-strain intelligent detection device for foundation pile - Google Patents

Abstract

The application relates to the technical field of foundation pile detection, in particular to a foundation pile low-strain intelligent detection device, which comprises a detector, a plurality of sensors connected with the detector and a detection frame, wherein the detection frame comprises an operation table for arranging the detector and a plurality of supporting legs for supporting the operation table, the side walls of the supporting legs are provided with fixing components for fixing the sensors in an axial sliding manner, and the sensors are axially hung down along the supporting legs and abut against the foundation pile; the top surface of the operating platform is movably connected with a detection hammer used for hammering the foundation pile in a clamping manner. This application has the fixed of sensor of conveniently accomplishing fast by operating personnel, improves the effect of the efficiency of the low strain detection operation of operating personnel.

Description

Low-strain intelligent detection device for foundation pile

Technical Field

The application relates to the technical field of foundation pile detection, in particular to a foundation pile low-strain intelligent detection device.

Background

When pile foundation engineering quality detects, often adopt the low strain detection mode of foundation pile to detect foundation pile body structural integrity in the pile foundation. The low strain method is a detection method for judging the integrity of the pile body by adopting a low-energy transient or steady-state excitation mode to excite the pile top, actually measuring a speed time course curve or a speed admittance curve of the pile top through a corresponding detection device and a matched sensor and analyzing the fluctuation theory or frequency domain.

Chinese patent with publication number CN209652999U discloses a low strain detection device for building engineering pile foundation detection, which comprises a box body, a detector, a detection hammer and a wire fixing mechanism, wherein the box body comprises a box main body and a box cover, the box cover is provided with a first placing groove, a detection hammer movable card is arranged in the first placing groove, the box cover is provided with a first magnetic part, the box main body is provided with a second placing groove, the detection hammer movable card is arranged in the second placing groove, the box main body is provided with a second magnetic part, the box main body is provided with a drawer, the box main body is provided with a locking component, the wire fixing mechanism comprises a fixed block and a winding board, and the detection hammer comprises a hammer handle, a hammer main body, a first hammer head and a second hammer head. The solidus mechanism twines unnecessary connecting wire and accomodates, avoids scattering subaerial, tup and hammer main part threaded connection, and the different tups are changed to convenient detection hammer, and the pile foundation that adapts to the different condition detects, and the accessory that needs use can be deposited to the drawer, conveniently carries.

In view of the above-mentioned related technologies, the inventor thinks that before an operator detects a foundation pile, a plurality of sensors connected to a detector need to be circumferentially arranged on an end face of the foundation pile, then a detection hammer is held by a hand to knock the foundation pile, and then detection data is output through the detector.

SUMMERY OF THE UTILITY MODEL

For the convenience of operating personnel accomplish the low strain detection operation of foundation pile fast, this application provides a foundation pile low strain intelligent detection device.

The application provides a low intelligent detection device that meets an emergency of foundation pile adopts following technical scheme:

a foundation pile low-strain intelligent detection device comprises a detector, a plurality of sensors connected with the detector and a detection frame, wherein the detection frame comprises an operation table for placing the detector and a plurality of support legs for supporting the operation table, the side walls of the support legs are provided with fixing assemblies for fixing the sensors in a sliding mode along the axial direction of the support legs, and the sensors are axially hung down along the support legs and abut against a foundation pile;

the top surface of the operating platform is movably connected with a detection hammer used for hammering the foundation pile in a clamping manner.

Through adopting above-mentioned technical scheme, operating personnel connects the detector with a plurality of sensors, then fix a plurality of sensors in the one side that corresponds the landing leg through corresponding fixed subassembly, operating personnel erects the test rack wholly on the foundation pile, a plurality of sensors support the foundation pile when a plurality of landing legs support on the foundation pile, the handheld detection hammer hammering foundation pile of operating personnel, a plurality of sensors and detector real-time detection and analysis excitation data, thereby accomplish the detection operation, make things convenient for operating personnel to accomplish the fixed of sensor fast, improve the efficiency of the low strain detection operation of operating personnel.

Optionally, the side wall of the support leg is provided with a sliding groove along the axial direction of the support leg;

the fixed subassembly is including sliding the connection the slider of spout, slider fixedly connected with stretches out the clamp splice of spout, the draw-in groove has been seted up to the lateral wall of clamp splice, just the clamp splice passes through the draw-in groove joint has the mounting panel, the sensor is worn to establish on the mounting panel.

Through adopting above-mentioned technical scheme, operating personnel wears to establish the sensor on the mounting panel, then with the mounting panel joint on the draw-in groove of clamp splice, after the landing leg supported on the foundation pile, the sensor droops down naturally, drives clamp splice and slider and slides the adjustment position in order to support the foundation pile along the spout, is favorable to nimble installation position that supplies the sensor according to supporting the foundation pile position natural adjustment slider of sensor, fixture block and mounting panel, improves the convenience that the sensor installation used.

Optionally, a snap ring for the sensor to penetrate is rotatably arranged on the mounting plate, and a fastening stud for fastening the sensor is threaded on the annular wall of the snap ring.

Through adopting above-mentioned technical scheme, operating personnel wears to establish the back on the snap ring with the sensor, and rotatory tight double-screw bolt in order to support tight positioning sensor's position supports, and the sensor relies on the snap ring free rotation on the mounting panel, makes things convenient for operating personnel to adjust the sensor and supports and pastes the foundation pile, improves the sensor and supports the connection quality who pastes the foundation pile.

Optionally, the detection hammer comprises a hammer head and a hammer handle connected with the hammer head;

the bottom surface of the operating platform is fixedly connected with a hammer falling barrel, the bottom surface of the hammer falling barrel is provided with an opening for placing the hammer head, and the side wall of the hammer falling barrel is provided with a first through groove along the axial direction of the side wall of the hammer falling barrel for extending the hammer handle.

Through adopting above-mentioned technical scheme, after the hammer head that operating personnel will detect the hammer was put into a hammer section of thick bamboo that falls, the hammer handle was stretched out by wearing groove one, has erect the test rack when operating personnel, and a plurality of sensors are supported and are pasted and wait to detect the foundation pile, and handheld hammer handle is along wearing groove one lifting hammer head, and after the tup rose a take the altitude, release hammer handle made the vertical free falling body of hammer head to accomplish the foundation pile hammering, make things convenient for operating personnel to control hammering falling point and impact force, improve the degree of accuracy that detects many times.

Optionally, the supporting legs are circumferentially hinged to the bottom surface of the operating platform, a positioning ring is slidably sleeved on the wall of the hammer dropping cylinder, a supporting rod is connected between the supporting legs and the positioning ring, one end of the supporting rod is hinged to the supporting legs, the other end of the supporting rod is hinged to the positioning ring, and the outer annular wall of the positioning ring is in threaded connection with a first positioning stud which is used for tightly abutting against the hammer dropping cylinder.

Through adopting above-mentioned technical scheme, when operating personnel rotated a plurality of landing legs, a plurality of landing legs slided along a hammer section of thick bamboo through corresponding branch pulling holding ring, through screwing a set stud one with the holding ring location back on a hammer section of thick bamboo that falls, accomplished the adjustment of a plurality of landing leg support positions, be favorable to adjusting the support position of a plurality of landing legs in a flexible way to the detection position of a plurality of sensors is adjusted in a flexible way according to the radial dimension of foundation pile.

Optionally, a telescopic cylinder is accommodated in the drop hammer cylinder, the telescopic cylinder is communicated with the drop hammer cylinder, a through groove II communicated with the through groove I is formed in the side wall of the telescopic cylinder, and a positioning stud II used for abutting against the telescopic cylinder is in threaded connection with the side wall of the drop hammer cylinder.

Through adopting above-mentioned technical scheme, operating personnel rotates the support position back of adjusting a plurality of landing legs, the distance of a drop hammer section of thick bamboo distance foundation pile top surface changes, when drop hammer section of thick bamboo bottom and foundation pile top surface apart from too big, operating personnel can be taken out a telescopic cylinder and according to the length of stretching out to the distance adjustment telescopic cylinder of foundation pile top surface by a drop hammer section of thick bamboo, then the position of two location telescopic cylinders of rotational positioning double-screw bolt, thereby to landing leg support altitude variation quick adjustment detect the position that the flexible cylinder was derived in hammer whereabouts, reduce the problem that the detection hammer whereabouts process leads out a drop hammer section of thick bamboo and causes the placement skew.

Optionally, a placement groove for clamping the detector is formed in the top surface of the operating platform, and a third positioning stud for penetrating through the groove side wall of the placement groove and tightly abutting against the detector is in threaded connection with the side wall of the operating platform.

Through adopting above-mentioned technical scheme, operating personnel detects the operation before with detector joint arrangement groove, then rotatory location double-screw bolt three support tight detector to the arrangement position of fixed detector improves the arrangement stability that the detector detected in the use, makes things convenient for operating personnel to remove the operation panel at will.

Optionally, the hammer handle is in threaded connection with the hammer head, and a hammer groove for clamping the hammer head and a handle groove for clamping the hammer handle are formed in the top surface of the operating platform.

Through adopting above-mentioned technical scheme, operating personnel has used up tup and hammer handle after, rotatory split tup and hammer handle to with tup joint hammer groove, hammer handle joint handle groove, thereby make things convenient for accomodating fast of tup and hammer handle, conveniently remove whole test rack.

In summary, the present application includes at least one of the following beneficial technical effects:

1. after the plurality of support legs are supported on the foundation pile, the plurality of sensors abut against the foundation pile, an operator holds the detection hammer to hammer the foundation pile, and the plurality of sensors and the detector detect and analyze excitation data in real time, so that detection operation is completed, the operator can conveniently and quickly complete the fixation of the sensors, and the efficiency of low-strain detection operation of the operator is improved;

2. the sensor is arranged on the clamping ring in a penetrating mode and is abutted and positioned by the abutting stud, the sensor freely rotates on the mounting plate by means of the clamping ring, an operator can conveniently adjust the sensor to abut against the foundation pile, and the connection quality of the sensor to abut against the foundation pile is improved;

3. the hammer handle is handed to operating personnel and releases the hammer handle after trough-penetrating lifting tup to a take the altitude, and the tup is vertical freely falls the completion foundation pile hammering, makes things convenient for operating personnel to control hammering falling point and impact force, improves the degree of accuracy that detects many times.

Drawings

Fig. 1 is a schematic structural diagram for embodying the entirety of the detector, the sensor, the detection frame, the fixing assembly, the hammer dropping barrel, and the detection hammer in the embodiment of the present application.

Fig. 2 is a cross-sectional view for embodying a holding stud, a telescopic cylinder, a snap ring, a clamping block, a first positioning stud, a second positioning stud and a third positioning stud in the embodiment of the present application.

Fig. 3 is an exploded view for showing a state where the hammer handle and the hammer head are detached in the embodiment of the present application.

Reference number specification, 1, detector; 2. a sensor; 3. a detection frame; 31. an operation table; 311. a placing groove; 312. positioning a stud III; 313. hammering the trough; 314. a shank slot; 32. a support leg; 321. a chute; 33. a hammer falling cylinder; 331. penetrating a first groove; 34. a strut; 35. a positioning ring; 36. positioning a first stud; 37. a telescopic cylinder; 371. penetrating a second groove; 38. positioning a stud II; 39. a handle; 4. a fixing assembly; 41. a slider; 42. a clamping block; 421. a card slot; 43. mounting a plate; 44. a snap ring; 45. tightly abutting the stud; 5. detecting the hammer; 51. a hammer head; 511. a screw hole; 52. a hammer handle; 521. a screw head.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses low strain intelligent detection device of foundation pile. Referring to fig. 1 and 2, the intelligent detection device for low strain of foundation pile comprises a detection frame 3, a detection hammer 5, a detector 1 installed on the top surface of the detection frame 3 and a plurality of sensors 2 connected with the detector 1, wherein the detection frame 3 comprises an operation table 31 and a plurality of support legs 32 supported on the bottom surface of the operation table 31, the detection hammer 5 comprises a hammer handle 52 and a hammer head 51 which are detachably connected, the top surface of the operation table 31 is provided with a placement groove 311 for clamping the detector 1, a hammer groove 313 for clamping the hammer head 51 and a handle groove 314 for clamping the hammer handle 52, the peripheral wall of the operation table 31 is fixed with a pair of handles 39 in a reverse way, the side surface of the support leg 32 facing the center of the bottom of the operation table 31 is provided with a sliding groove 321 along the self axial direction, the support leg 32 is connected with a fixing component 4 in a sliding way through a corresponding sliding groove 321, the sensors 2 are installed on the fixing component 4 and hang down along the sliding groove 321 and abut against the foundation pile, the detection principle of the detector 1 and the sensors 2 is the prior art, and will not be described in detail herein. An operator clamps the detector 1 in the placing groove 311, holds the handle 39 with two hands to support the operating platform 31 on the top of the foundation pile through the support legs 32, hangs down the sensors 2 along the sliding grooves 321 to abut against the foundation pile at the moment, takes down the hammer head 51 and the hammer handle 52 and assembles, and then strikes the foundation pile to detect the foundation pile and analyze the excitation data to complete the operation.

Referring to fig. 1 and 2, the fixing assembly 4 includes a slider 41 connected to the sliding groove 321 in a sliding manner, a clamping block 42 extending out of the sliding groove 321 is integrally formed on a side surface of the slider 41 facing an opening of the sliding groove 321, a clamping groove 421 is formed in a side wall of the clamping block 42 facing away from the slider 41, the clamping groove 421 extends in a horizontal direction, the clamping block 42 is clamped with a mounting plate 43 through the clamping groove 421, one end of the mounting plate 43, which is far away from the clamping block 42, faces an inner groove of the mounting plate 43, a clamping ring 44 is rotatably arranged in the mounting plate 43, a supporting stud 45 is threaded on a ring wall of the clamping ring 44, and after the sensor 2 longitudinally penetrates through the clamping ring 44, the supporting stud 45 is rotated to support the sensor 2 to position the sensor 2; sensor 2 relies on snap ring 44 free rotation on mounting panel 43, make things convenient for operating personnel to adjust 2 supports and pastes the foundation pile, improve the connection quality that sensor 2 supported and pastes the foundation pile, with mounting panel 43 joint on clamping groove 421 of clamp splice 42, back on the foundation pile is supported to landing leg 32, sensor 2 hangs down naturally, drive clamp splice 42 and slider 41 slide adjusting position along spout 321 with supporting the foundation pile, be favorable to the nimble foundation pile position that supports according to sensor 2 adjusts slider 41 naturally, fixture block and mounting panel 43, improve the convenience of sensor 2 installation and use.

Referring to fig. 2 and 3, the outer peripheral wall of the hammer head 51 is provided with a screw hole 511, the end of the hammer handle 52 is fixed with a screw head 521, the hammer handle 52 is screwed with the screw hole 511 of the hammer head 51 through the screw head 521 to complete assembly, when disassembly and storage are needed, the hammer head 51 and the hammer handle 52 are separated by rotation, the hammer head 51 is sequentially clamped into the hammer groove 313, and the hammer handle 52 is clamped into the handle groove 314, so that the low-strain dynamic detection device is convenient and rapid to disassemble, store and assemble for use, the hammer head 51 used for low-strain dynamic detection is made of iron, nylon, plastic, hard rubber and the like, the pulse force duration obtained by excitation of the hammer head 51 is short, the force spectrum is rich in high-frequency components, the wavelength is small, the defect position judgment accuracy is high, and for a. The impulse force obtained by the excitation of the hammer or the force rod made of materials such as a nylon tap, a hard rubber head and the like has the advantages of rich low-frequency components, low frequency, long duration and deep propagation depth, and is suitable for detecting deep defects or long and large piles. For a large diameter cast-in-place pile, in addition to selecting a heavy hammer to increase the energy impact, the diameter of the hammer is correspondingly increased so as to increase the contact area between the hammer and the pile head, and in the embodiment of the present invention, the hammer groove 313 is configured to store a plurality of hammers 51 made of a plurality of materials.

Referring to fig. 1 and 2, a hammer dropping cylinder 33 is fixedly connected to the center of the bottom surface of the operating table 31, the hammer dropping cylinder 33 hangs down longitudinally, an opening for placing a hammer 51 is formed in the bottom surface of the hammer dropping cylinder 33, and a first through groove 331 for extending a hammer handle 52 is formed in the side wall of the hammer dropping cylinder 33 along the axial direction; in the embodiment of the application, the number of the supporting legs 32 can be three, at this time, the number of the sensors 2 is correspondingly three, the three supporting legs 32 are uniformly hinged to the bottom surface of the operating platform 31 in the circumferential direction by taking the center of the bottom surface of the operating platform 31 as the center, the three supporting legs 32 are uniformly hinged to the bottom surface of the operating platform 31 in the circumferential direction, the positioning rings 35 are slidably sleeved on the upper parts of the cylinder walls of the drop hammer cylinders 33, supporting rods 34 are respectively connected between the three supporting legs 32 and the positioning rings 35, one ends of the supporting rods 34 are hinged to the corresponding supporting legs 32, the other ends of the supporting rods are hinged to the positioning rings 35, the positioning studs 36 are in threaded connection with the outer ring walls of the positioning rings 35, the positions of the positioning rings 35 are adjusted by synchronously rotating the three supporting legs 32 back to back or in opposite directions, the positioning studs 36 tightly abut against the drop hammer cylinders 33 to complete the supporting positions of the positioning supporting legs 32, and the supporting positions of the three supporting legs 32 can be flexibly adjusted, and therefore the detection positions of the sensors 2 can be flexibly adjusted according to the radial size of the foundation pile; after an operator puts the hammer head 51 of the detection hammer 5 into the hammer falling cylinder 33, the hammer handle 52 extends out of the first through groove 331, the operator erects the detection frame 3, the three sensors 2 abut against the foundation pile to be detected, the hammer handle 52 is held by hand to lift the hammer head 51 along the first through groove 331, and after the hammer head 51 rises to a certain height, the hammer handle 52 is released to enable the hammer head 51 to vertically and freely fall, so that the hammering of the foundation pile is completed, the hammer falling point and the impact force can be conveniently controlled by the operator, and the accuracy of multiple detection is improved.

Referring to fig. 1 and 2, a telescopic cylinder 37 is accommodated in the hammer dropping cylinder 33, the telescopic cylinder 37 longitudinally penetrates through the telescopic cylinder, the outer cylinder wall of the telescopic cylinder 37 is attached to the inner cylinder wall of the hammer dropping cylinder 33, a through groove two 371 communicated with the through groove one 331 is formed in the side wall of the telescopic cylinder 37, and the outer cylinder wall of the hammer dropping cylinder 33 on one side of the opening end is in threaded connection with a positioning stud two 38 abutted against the telescopic cylinder 37; after the support position of three landing legs 32 of operating personnel rotation adjustment, the distance of a hammer dropping section of thick bamboo 33 apart from the foundation pile top surface changes, when hammer dropping section of thick bamboo 33 bottom and foundation pile top surface apart from too big, operating personnel can be taken out telescopic tube 37 and according to the length of stretching out to the distance adjustment telescopic tube 37 of foundation pile top surface by hammer dropping section of thick bamboo 33, then the position of telescopic tube 37 is fixed a position to rotatory positioning stud two 38, thereby support the position that highly variable quick adjustment detected hammer 5 whereabouts was derived telescopic tube 37 to landing leg 32, reduce the problem that the process of detecting hammer 5 whereabouts leads out hammer dropping section of thick bamboo 33 too early and causes the placement skew.

Referring to fig. 2, the outer circumferential wall of the console 31 is threadedly connected with a positioning stud three 312 penetrating through the groove sidewall of the seating groove 311; before the detection operation of an operator, the detector 1 is clamped in the placing groove 311, and then the third positioning stud 312 is rotated to tightly abut against the detector 1, so that the placing position of the detector 1 is fixed, the placing stability of the detector 1 in the detection and use process is improved, and the operator can conveniently move the operating platform 31 at will.

The implementation principle of the low-strain intelligent detection device for the foundation pile in the embodiment of the application is as follows: an operator connects the three sensors 2 with the detector 1, fixes the three sensors 2 at the inner sides of the corresponding support legs 32 through corresponding snap rings 44 and abutting studs 45, integrally erects the operating platform 31 and the three support legs 32 on a foundation pile by holding the handle 39 by the operator, rotates the three support legs 32 to adjust the supporting positions, the position of the positioning ring 35 is fixed by rotating the positioning stud I36, three sensors 2 abut against the foundation pile when three support legs 32 are supported on the foundation pile, an operator assembles the hammer handle 52 and the hammer head 51, the hammer head 51 is placed into the hammer falling cylinder 33 through the opening end of the hammer falling cylinder 33, the hammer handle 52 extends out of the first through groove 331, the positioning stud II 38 is loosened, the length of the telescopic cylinder 37 extending out of the hammer falling cylinder 33 is adjusted by pulling out the positioning stud II, the hammer head 5 is lifted and released along the first through groove 331 and the second through groove 371, the hammer head 51 hammers the foundation pile, the sensors 2 and the detector 1 detect and analyze excitation data in real time, and accordingly detection operation is completed.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a foundation pile low strain intellectual detection system device, includes detector (1) and a plurality of connections sensor (2) of detector (1), its characterized in that: the detection device is characterized by further comprising a detection frame (3), wherein the detection frame (3) comprises an operation table (31) for placing the detection instrument (1) and a plurality of support legs (32) for supporting the operation table (31), the side walls of the support legs (32) are provided with fixing assemblies (4) for fixing the sensor (2) in a sliding mode along the axial direction of the support legs, and the sensor (2) axially hangs down along the support legs (32) and abuts against a foundation pile;

and the top surface of the operating platform (31) is movably clamped with a detection hammer (5) for hammering the foundation pile.

2. The foundation pile low-strain intelligent detection device according to claim 1, characterized in that: the side wall of the supporting leg (32) is provided with a sliding groove (321) along the axial direction of the supporting leg;

fixed subassembly (4) are including sliding the connection slider (41) of spout (321), slider (41) fixedly connected with stretches out clamp splice (42) of spout (321), draw-in groove (421) have been seted up to the lateral wall of clamp splice (42), just clamp splice (42) pass through draw-in groove (421) joint has mounting panel (43), sensor (2) are worn to establish on mounting panel (43).

3. The foundation pile low-strain intelligent detection device according to claim 2, characterized in that: the mounting plate (43) is provided with a clamping ring (44) for the sensor (2) to penetrate through in a rotating mode, and a fastening stud (45) used for fastening the sensor (2) penetrates through the wall of the clamping ring (44).

4. The foundation pile low-strain intelligent detection device according to any one of claims 1 to 3, characterized in that: the detection hammer (5) comprises a hammer head (51) and a hammer handle (52) connected with the hammer head (51);

the bottom surface of the operating platform (31) is fixedly connected with a hammer dropping cylinder (33), the bottom surface of the hammer dropping cylinder (33) is provided with an opening for placing the hammer head (51), and the side wall of the hammer dropping cylinder (33) is provided with a first through groove (331) for extending the hammer handle (52) along the self axial direction.

5. The intelligent detection device for foundation pile low strain according to claim 4, characterized in that: a plurality of landing leg (32) circumference is articulated the bottom surface of operation panel (31), slip the cover on the section of thick bamboo wall of a hammer falling section of thick bamboo (33) and be equipped with holding ring (35), landing leg (32) with be connected with branch (34) between holding ring (35), just the one end of branch (34) is articulated landing leg (32), the other end is articulated holding ring (35), the outer rampart threaded connection of holding ring (35) has and is used for supporting tightly the positioning stud (36) of a hammer falling section of thick bamboo (33).

6. The intelligent detection device for foundation pile low strain according to claim 5, characterized in that: accomodate telescopic cylinder (37) in falling hammer section of thick bamboo (33), just telescopic cylinder (37) with it link up to fall hammer section of thick bamboo (33), the intercommunication is seted up to the lateral wall of telescopic cylinder (37) wear groove two (371) of groove one (331), the lateral wall threaded connection of falling hammer section of thick bamboo (33) has and is used for supporting tightly positioning stud two (38) of telescopic cylinder (37).

7. The intelligent detection device for foundation pile low strain according to claim 5, characterized in that: the top surface of the operating platform (31) is provided with a placement groove (311) for clamping the detector (1), and the side wall of the operating platform (31) is in threaded connection with a third positioning stud (312) which is used for penetrating through the side wall of the placement groove (311) and tightly abutting against the detector (1).

8. The intelligent detection device for foundation pile low strain according to claim 7, characterized in that: the hammer handle (52) is in threaded connection with the hammer head (51), and a hammer groove (313) for clamping the hammer head (51) and a handle groove (314) for clamping the hammer handle (52) are formed in the top surface of the operating platform (31).

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