CN210104739U - Hydraulic impact hammer - Google Patents
Hydraulic impact hammer Download PDFInfo
- Publication number
- CN210104739U CN210104739U CN201920408001.8U CN201920408001U CN210104739U CN 210104739 U CN210104739 U CN 210104739U CN 201920408001 U CN201920408001 U CN 201920408001U CN 210104739 U CN210104739 U CN 210104739U
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- impact hammer
- pile
- hammer core
- frame body
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- 238000010276 construction Methods 0.000 claims description 12
- 238000005242 forging Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
A hydraulic impact hammer comprises an impact hammer core, an outer shell, a pile cap group, a lifting oil cylinder, a wear-resistant lining plate and a hydraulic system, wherein two guide frames of the outer shell are symmetrically arranged along the vertical direction of a frame body respectively; the two guide grooves of the impact hammer core are symmetrically arranged along the vertical direction of the upper hammer core; a piston rod of the lifting oil cylinder is hinged and installed on the upper end surface of the upper hammer core, and a cylinder barrel of the lifting oil cylinder is hinged and installed on the lower end surface of an upper cover plate of the outer shell; the wear-resistant lining plates are arranged on the outer surfaces of the two guide frames; the pile cap group is fixedly arranged on the frame body flange of the outer shell through an upper cap flange of the upper pile cap, and the lower pile cap is sleeved in the upper pile cap; the chopping block is arranged in the central counter bore of the lower cap in a way of being higher than the end surface of the inner ring of the lower cap; the buffer ring is arranged in a mode of being higher than the end face of the boss, and the upper plane of the buffer ring is tightly attached to the lower end face of the upper pile cap; the utility model has the characteristics of good whole rigidity, little hammer core motion resistance, impact resistance of the chopping block, high operation efficiency, low manufacturing cost, low use cost and the like.
Description
Technical Field
The utility model relates to an engineering machine tool, in particular to hydraulic impact hammer.
Background
With the continuous expansion of the scale of industrial and civil buildings, roads and bridges, intercity high-speed rails and urbanization construction, the requirement on pile foundations is higher and higher, and the pile driving equipment is required to have better technical performance and working efficiency. The traditional diesel pile hammer is influenced by factors such as oil smoke emission, high noise, large vibration, low working efficiency and the like, cannot meet the requirements of low carbon, energy conservation and environmental protection advocated by modern foundation construction, is greatly limited in application range and area, and is forbidden to be constructed in central urban areas at home and abroad. Pile foundation construction equipment with high precision, high efficiency and high response is competitively researched by domestic and foreign pile foundation manufacturers, and the hydraulic impact hammer has the technical characteristics of high operation efficiency, low noise, small vibration, no smoke pollution and the like, meets the green and environment-friendly requirements of low carbon and energy conservation, gradually replaces the traditional diesel pile hammer, continuously expands the product specification series, and continuously improves the product performance.
The hydraulic impact hammer belongs to an impact pile hammer, a hammer core of the hydraulic impact hammer is lifted by a hydraulic system to a preset height and is quickly released, the hammer core directly acts on an anvil block or a pile cap of the hydraulic impact hammer in a mode of being larger than or close to a free falling body, and the pile body is beaten into the stratum after the hammer core does work on the pile body through the anvil block and the pile cap. Because the acting force of the hammer core of the hydraulic hammer on the anvil block is very large, the staying and transferring time is only about 0.1-0.15 seconds, if the hammer core of the hydraulic hammer vibrates greatly after impacting the anvil block, great impact force is generated on the hammer body and the pile cap, great damage is caused on the hydraulic hammer body, the working performance of the hydraulic hammer is influenced, and the service life of the hydraulic hammer is shortened; the great impact force is very big to the pile head damage of prestressed pile or tubular pile, causes the pile head damaged to it is inconvenient to add the grafting for the pile body, influences pile foundation construction quality.
The existing hydraulic hammer comprises an impact hammer body and a hammer core arranged in the hammer body, the top of the hammer body is connected with a hydraulic power system, and the other end of the hammer body is a working end for striking the pile body. The hammer core and the hammer body are both rectangular in cross section, the hammer core is guided on the four inner corner guide strips of the inner cavity of the hammer body through the four corner guide grooves of the hammer core, the lifting and falling stability and reliability of the hammer core in the inner cavity of the hammer body are guaranteed, the structural mode enables the hammer body and the hammer core to be complex to process, and the manufacturing cost of the whole hydraulic hammer is increased. When the pile sinking construction operation of hydraulic pile hammer, though the antifriction plate that gib block surface length direction set up, nevertheless because the hammer heart is frequent reciprocating motion at the hammer block inner chamber, cause this antifriction plate wearing and tearing very fast, the user need inspect its degree of wear, just need dismantle and change the antifriction plate when exceeding the limit of wear, influence pile foundation efficiency of construction, increase construction operation expense. At present, a hydraulic hammer anvil block adopts a pure iron plate or an iron plate liner steel wire rope form, the anvil block is easy to deform under the condition that a hammer core is frequently hammered, the surface temperature reaches more than 200 ℃, the anvil block, a pile cap and a hydraulic hammer body are deformed and damaged, the anvil block needs to be frequently replaced, the utilization rate of equipment is reduced, and the engineering cost of a pile foundation is increased. Technical problems to be solved and overcome by technical personnel are how to reduce the running resistance in the process of piling by the hydraulic hammer and how to improve the material strength, rigidity and impact resistance of the anvil block, thereby further prolonging the service life of the hydraulic hammer and improving the construction efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at overcomes the shortcoming that prior art exists, provides a hydraulic pressure jump bit that whole rigidity is good, reduce hammer heart motion resistance, chopping block impact resistance is good, effectively improves the operating efficiency and reduces manufacturing cost, accords with low carbon emission, green energy-conserving environmental protection requirement.
In order to achieve the above purpose, the utility model adopts the following solution:
the utility model provides a hydraulic impact hammer, includes impact hammer core, shell body, pile cap group, lift cylinder, wear-resisting welt and hydraulic system, wherein:
the impact hammer core comprises a lower hammering head and an upper hammer core with a guide groove;
the outer shell comprises a frame body containing a guide frame, an upper cover plate and a lower flange;
the pile cap group comprises an upper pile cap with an upper cap flange and a lower pile cap, wherein the lower pile cap comprises a lower cap cover plate with a lower cap inner ring and a boss, a chopping block and a buffer ring;
the method is characterized in that:
the frame body of the outer shell is a cuboid welding structure body; the two guide frames are symmetrically arranged on the inner side surfaces of the left side and the right side of the frame body along the vertical direction of the frame body; the upper cover plate is fixedly arranged at the upper end of the frame body through a fastener; the lower flange is fixedly arranged at the lower end of the frame body;
the upper hammer core of the impact hammer core is a cuboid, and the two guide grooves are symmetrically arranged on the left side and the right side of the upper hammer core along the vertical direction of the upper hammer core; the lower hammering head is a cylinder positioned below the upper hammering core;
the impact hammer core is sleeved in the inner cavity of the frame body of the outer shell and is embedded into the two symmetrical guide frames of the frame body of the outer shell through the two symmetrical guide grooves on the side surface of the impact hammer core;
a piston rod of the lifting oil cylinder is hinged and installed on the upper end face of an upper hammer core of the impact hammer core, and a cylinder barrel of the lifting oil cylinder is hinged and installed on the lower end face of an upper cover plate of the outer shell;
the wear-resistant lining plates are respectively arranged on the outer surfaces of the two guide frames of the frame body along the vertical direction of the two guide frames;
the pile cap group is fixedly arranged on a lower flange of the outer shell through an upper cap flange of the upper pile cap; the lower pile cap is sleeved in the hole of the upper pile cap through a lower cap cover plate; the lower cap inner ring is arranged at the geometric center of the upper end face of the lower cap cover plate; the chopping block is a disc-shaped cylinder and is arranged in a central counter bore in a mode of being higher than the end surface of the inner ring of the lower cap, and the upper end surface of the chopping block is contacted with the bottom plane of the lower hammering head of the impact hammer core; the buffer ring is arranged in the boss ring groove on the end face of the buffer ring in a mode of being higher than the end face of the boss, and the upper plane of the buffer ring is tightly attached to the lower end face of the upper cap flange of the upper pile cap; the lower end counter bore of the lower pile cap is sleeved on the pile head of an externally prefabricated prestressed pile or a tubular pile;
the hydraulic system drives the lifting oil cylinder, a piston rod of the lifting oil cylinder drives the impact hammer core to move upwards in the frame body inner cavity of the outer shell, when the impact hammer core reaches a designed stroke, a hydraulic loop is switched, the impact hammer core moves downwards immediately, a hammering head at the lower part of the impact hammer core impacts a chopping board in a center counter bore of a lower cap cover plate of the lower pile cap, and the impact force of the hydraulic impact hammer is transmitted from an external precast pile to carry out pile driving construction.
The utility model can be, the impact hammer core adopts the alloy steel of the trade mark 35CrMo, perhaps 42CrMo to make through forging, after forging normalizing treatment and machining, and after forging normalizing treatment brinell hardness is HB160 ~ 190.
The utility model can also be that the verticality tolerance between the two guide grooves on the upper hammer core of the impact hammer core and the end surface of the lower hammer head is 0.9-0.11 mm; the perpendicularity tolerance between the two guide frames in the frame body of the outer shell and the end face of the frame body is 0.95-0.105 mm.
The utility model discloses can also be, arrange with one section distance mode at the interval when wear-resisting welt sets up on each surface of two leading trucks of framework.
The utility model discloses can also be, wear-resisting welt adopts the nodular cast iron that trade mark is QT500-7 or QT600-3 to make, and they all fix on each surface of two leading trucks of framework inner chamber through the screw.
And the fit clearance between the upper cap stepped hole of the upper pile cap and the lower cap cover plate of the lower pile cap is 2.00-3.00 mm.
The utility model discloses can also be, the chopping block adopts the polymer material to make, and main performance index as follows: the density is = 1.10-1.2 g/cm3, the tensile strength is not less than 60MPa, the elongation at break is not less than 160%, the tensile modulus is not less than 1600MPa, the Rockwell hardness is not less than R116, and the impact strength of a pendulum gap is not less than 6 kJ/m.
Drawings
Fig. 1 is a schematic structural view of the hydraulic impact hammer of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a sectional view taken along line A-A of FIG. 1;
FIG. 5 is a structural diagram of a pile cap assembly of the hydraulic impact hammer of the present invention;
FIG. 6 is a sectional view taken along line B-B.
Detailed Description
The hydraulic impact hammer of the present invention will be further described with reference to the embodiments shown in the drawings.
A hydraulic impact hammer comprises an impact hammer core 1, an outer shell 2, a pile cap group 3, a lifting oil cylinder 4, a wear-resistant lining plate 6 and a hydraulic system; the impact hammer core 1 comprises a lower hammering head 11 and an upper hammer core 12 with guide grooves 122, 122'; the outer casing 2 comprises a frame 20 including guide frames 201, 201', an upper cover plate 21 and a lower flange 22; the pile cap group 3 comprises an upper pile cap 31 with an upper cap flange 311, a lower cap cover plate 320 with a lower cap inner ring 321 and a boss 325, a cutting board 322 and a lower pile cap 32 with a buffer ring 323; wherein:
the frame body 20 of the outer shell 2 is a cuboid welding structure; the two guide frames 201, 201' are symmetrically arranged on the inner side surfaces of the left and right sides of the frame body 20 along the vertical direction; the upper cover plate 21 is fixedly arranged at the upper end of the frame body 20 through a fastener; the lower flange 22 is fixedly arranged at the lower end of the frame body 20;
the upper hammer core 12 of the impact hammer core 1 is a cuboid, and the two guide grooves 122, 122' are symmetrically arranged on the left side and the right side of the upper hammer core 12 along the vertical direction of the upper hammer core; the lower hammering head 11 is a cylinder located below the upper hammer core 12. The impact hammer core 1 is made of alloy steel with the mark of 35CrMo or 42CrMo through forging, normalizing treatment after forging and machining, and the Brinell hardness after normalizing treatment after forging is HB 160-190. The material has high static strength, impact toughness, high fatigue limit, good hardenability, no overheating tendency, small quenching deformation, effectively ensured impact resistance and prolonged service life.
The impact hammer core 1 is sleeved in the inner cavity of the frame 20 of the outer shell 2 and is embedded into the two symmetrical guide frames 202, 202 'of the frame 20 of the outer shell 2 through the two symmetrical guide grooves 122, 122' on the side surface of the impact hammer core. The perpendicularity tolerance between the two guide grooves 122, 122' on the upper hammer core 12 of the impact hammer core 1 and the end surface of the lower hammering head 11 is 0.9-0.11 mm; the verticality tolerance between the two guide frames 201 and 201' in the frame 20 of the outer shell 2 and the end surface of the frame 20 is 0.95-0.105 mm. The impact hammer core can move freely up and down in the frame inner cavity of the outer shell, and the striking efficiency of the hydraulic impact hammer is effectively exerted.
A piston rod 41 of the lifting oil cylinder 4 is hinged and installed on the upper end face of an upper hammer core 12 of the impact hammer core 1, and a cylinder barrel 42 of the lifting oil cylinder is hinged and installed on the lower end face of an upper cover plate 21 of the outer shell 2;
the wear-resistant lining plates 6 are respectively disposed on the respective outer surfaces thereof in the vertical direction of the two guide frames 201, 201' of the frame body 20. The wear-resistant lining plates 6 are arranged at a distance from each other when provided on the respective outer surfaces of the two guide frames 201, 201' of the frame body 20. When the hydraulic impact hammer is maintained, the hydraulic impact hammer can be replaced according to the abrasion condition, and the maintenance cost of the abrasion-resistant plate is effectively controlled. The wear-resistant lining plate 6 is made of nodular cast iron with the mark number of QT500-7 or QT600-3, has the characteristics of high strength, small plastic deformation, heat resistance, wear resistance, corrosion resistance, good size stability and the like, and is fixed on the outer surfaces of the two guide frames 201 and 201' in the inner cavity of the frame body 20 through screws. The user can conveniently detach and replace the wear-resisting plate.
The pile cap group 3 is fixedly arranged on the lower flange 22 of the outer shell 2 through an upper cap flange 311 of the upper pile cap 31; the lower pile cap 32 is sleeved in the hole of the upper pile cap 31 through the lower cap cover plate 320; the fit clearance between the upper cap stepped hole 312 of the upper pile cap 31 and the lower cap cover plate 320 of the lower pile cap 32 is 2.00-3.00 mm; when the hydraulic hammer strikes to carry out the pile operation, guarantee that the effort of impact hammer core 1 effectively acts on chopping block 322 on lower pile cap 32, avoid on the shell body 2 of hydraulic impact hammer because of the transmission of impact vibration, cause the damage of hydraulic impact hammer body. The lower cap inner ring 321 is arranged at the geometric center of the upper end surface of the lower cap cover plate 320; the chopping block 322 is a disc-shaped cylinder, is arranged in the central counter bore 3210 thereof in a manner of being higher than the end surface of the lower cap inner ring 321, and the upper end surface thereof is in contact with the bottom plane of the lower hammering head 11 of the impact hammer core 1; chopping block 322 adopts the polymer material to make, and main performance index is as follows: the density is = 1.10-1.2 g/cm3, the tensile strength is not less than 60MPa, the elongation at break is not less than 160%, the tensile modulus is not less than 1600MPa, the Rockwell hardness is not less than R116, and the impact strength of a pendulum gap is not less than 6 kJ/m. Therefore, the hydraulic impact hammer has the characteristics of higher rigidity, proper elasticity, impact resistance, high temperature resistance of more than 200-250 ℃ and the like, can ensure that the striking energy of the impact hammer core is effectively transmitted, is suitable for frequent striking of the impact hammer core, improves the condition that an iron chopping block is easy to break and crack, effectively avoids impact damage of rebound force to the hydraulic hammer body, and improves the working efficiency of the hydraulic impact hammer. The buffer ring 323 is arranged in a boss ring groove 3250 on the end surface of the boss 325 in a mode of being higher than the end surface of the boss, and the upper plane of the buffer ring is tightly attached to the lower end surface of an upper cap flange 311 of the upper pile cap 31; the lower end counter bore 324 of the lower pile cap 32 is sleeved on the pile head of the lower pre-stressed pile or pipe pile. When the hydraulic impact hammer performs hammering operation, the buffer ring 323 effectively isolates the impact of pile cap rebound on the outer shell of the hydraulic impact hammer, improves the vibration condition in the construction process of the hydraulic impact hammer, and is favorable for prolonging the service life of equipment.
The hydraulic system drives the lifting oil cylinder 4, the piston rod 41 of the lifting oil cylinder drives the impact hammer core 1 to move upwards in the inner cavity of the frame body 20 of the outer shell 2, when the impact hammer core 1 reaches the designed stroke, a hydraulic circuit is switched, the impact hammer core 1 moves downwards immediately, the lower part hammering head 11 of the impact hammer core strikes a cutting board 322 in the center counter bore 3210 of the lower cover plate 320 of the lower pile cap 32, and the impact force of the hydraulic impact hammer is transmitted to the precast prestressed pile or the tubular pile located at the lower part of the pile cap for pile driving construction.
Claims (7)
1. The utility model provides a hydraulic impact hammer, includes impact hammer core (1), shell body (2), pile cap group (3), lift cylinder (4), wear-resisting welt (6) and hydraulic system, wherein:
the impact hammer core (1) comprises a lower hammering head (11) and an upper hammer core (12) with guide grooves (122, 122');
the outer shell (2) comprises a frame body (20) containing guide frames (201, 201'), an upper cover plate (21) and a lower flange (22);
the pile cap group (3) comprises an upper pile cap (31) and a lower pile cap (32), wherein the upper pile cap (31) comprises an upper cap flange (311)) and an upper cap stepped hole (312), and the lower pile cap (32) comprises a lower cap cover plate (320) comprising a lower cap inner ring (321) and a boss (325), a cutting board (322) and a buffer ring (323);
the method is characterized in that:
the frame body (20) of the outer shell (2) is a cuboid welding structure body; the two guide frames (201, 201') are symmetrically arranged on the inner side surfaces of the left side and the right side of the frame body (20) along the vertical direction of the frame body; the upper cover plate (21) is fixedly arranged at the upper end of the frame body (20) through a fastener; the lower flange (22) is fixedly arranged at the lower end of the frame body (20);
the upper hammer core (12) of the impact hammer core (1) is a cuboid, and the two guide grooves (122, 122') are symmetrically arranged on the left side and the right side of the upper hammer core (12) along the vertical direction of the upper hammer core; the lower hammering head (11) is a cylinder positioned below the upper hammer core (12);
the impact hammer core (1) is sleeved in an inner cavity of a frame body (20) of the outer shell (2) and is embedded into two symmetrical guide frames (202, 202 ') of the frame body (20) of the outer shell (2) through two symmetrical guide grooves (122, 122') on the side surface of the impact hammer core;
a piston rod (41) of the lifting oil cylinder (4) is hinged and installed on the upper end face of an upper hammer core (12) of the impact hammer core (1), and a cylinder barrel (42) of the lifting oil cylinder is hinged and installed on the lower end face of an upper cover plate (21) of the outer shell (2);
the wear-resistant lining plates (6) are respectively arranged on the outer surfaces of the two guide frames (201, 201') of the frame body (20) along the vertical direction of the guide frames;
the pile cap group (3) is fixedly arranged on a lower flange (22) of the outer shell (2) through an upper cap flange (311) of the upper pile cap (31); the lower pile cap (32) is sleeved in the hole of the upper pile cap (31) through the lower cap cover plate (320); the lower cap inner ring (321) is arranged at the geometric center of the upper end face of the lower cap cover plate (320); the chopping block (322) is a disc-shaped cylinder, is arranged in the central counter bore (3210) in a mode of being higher than the end surface of the lower cap inner ring (321), and the upper end surface of the chopping block is contacted with the bottom plane of the lower hammering head (11) of the impact hammer core (1); the buffer ring (323) is arranged in a boss ring groove (3250) of the end face of the boss (325) in a mode of being higher than the end face of the boss, and the upper plane of the buffer ring is tightly attached to the lower end face of an upper cap flange (311) of the upper pile cap (31); a lower end counter bore (324) of the lower pile cap (32) is sleeved on the pile head of an external prestressed pile or a tubular pile;
the hydraulic system drives the lifting oil cylinder (4), a piston rod (41) of the lifting oil cylinder drives the impact hammer core (1) to move upwards in an inner cavity of a frame body (20) of the outer shell (2), when the impact hammer core (1) reaches a designed stroke, a hydraulic circuit is switched, the impact hammer core (1) moves downwards immediately, a lower hammering head (11) of the impact hammer core impacts a cutting board (322) located in a center counter bore (3210) of a lower cap cover plate (320) of the lower pile cap (32), and the impact force of the hydraulic impact hammer is transmitted to a precast pile from the outside to carry out pile driving construction.
2. The hydraulic impact hammer according to claim 1, wherein the impact hammer core (1) is made of alloy steel with the grade of 35CrMo or 42CrMo through forging, normalizing treatment after forging and machining, and the Brinell hardness after normalizing treatment after forging is HB 160-190.
3. The hydraulic impact hammer according to claim 1, wherein the perpendicularity tolerance of the two guide grooves (122, 122') on the upper hammer core (12) of the impact hammer core (1) and the end surface of the lower hammer head (11) is 0.9-0.11 mm; the perpendicularity tolerance between the two guide frames (201, 201') in the frame body (20) of the outer shell (2) and the end face of the frame body (20) is 0.95-0.105 mm.
4. A hydraulic impact hammer according to claim 1, characterized in that the wear liners (6) are arranged at a distance apart when provided on the respective outer surfaces of the two guide brackets (201, 201') of the frame (20).
5. A hydraulic impact hammer according to claim 1 or 4, characterized in that the wear-resistant lining plate (6) is made of nodular cast iron with the designation QT500-7 or QT600-3, which are each fixed by screws on the respective outer surfaces of two guide frames (201, 201') in the inner cavity of the frame (20).
6. The hydraulic impact hammer according to claim 1, wherein a fit clearance between the upper cap stepped hole (312) of the upper pile cap (31) and the lower cap cover plate (320) of the lower pile cap (32) is 2.00 to 3.00 mm.
7. The hydraulic impact hammer according to claim 1, wherein the anvil (322) is made of a polymer material, and has the following main performance indexes: the density is = 1.10-1.2 g/cm3, the tensile strength is not less than 60MPa, the elongation at break is not less than 160%, the tensile modulus is not less than 1600MPa, the Rockwell hardness is not less than R116, and the impact strength of a pendulum gap is not less than 6 kJ/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920408001.8U CN210104739U (en) | 2019-03-28 | 2019-03-28 | Hydraulic impact hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920408001.8U CN210104739U (en) | 2019-03-28 | 2019-03-28 | Hydraulic impact hammer |
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| Publication Number | Publication Date |
|---|---|
| CN210104739U true CN210104739U (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920408001.8U Withdrawn - After Issue CN210104739U (en) | 2019-03-28 | 2019-03-28 | Hydraulic impact hammer |
Country Status (1)
| Country | Link |
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| CN (1) | CN210104739U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914409A (en) * | 2019-03-28 | 2019-06-21 | 上海工程机械厂有限公司 | A kind of hydraulic impact hammer |
| CN111664082A (en) * | 2020-06-18 | 2020-09-15 | 中国石油天然气股份有限公司 | Light full-automatic stroke adjusting impact device of oil pumping unit |
-
2019
- 2019-03-28 CN CN201920408001.8U patent/CN210104739U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914409A (en) * | 2019-03-28 | 2019-06-21 | 上海工程机械厂有限公司 | A kind of hydraulic impact hammer |
| CN109914409B (en) * | 2019-03-28 | 2024-04-26 | 上海工程机械厂有限公司 | Hydraulic impact hammer |
| CN111664082A (en) * | 2020-06-18 | 2020-09-15 | 中国石油天然气股份有限公司 | Light full-automatic stroke adjusting impact device of oil pumping unit |
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