CN108374417B - hydraulic pile breaker - Google Patents
hydraulic pile breaker Download PDFInfo
- Publication number
- CN108374417B CN108374417B CN201810437127.8A CN201810437127A CN108374417B CN 108374417 B CN108374417 B CN 108374417B CN 201810437127 A CN201810437127 A CN 201810437127A CN 108374417 B CN108374417 B CN 108374417B
- Authority
- CN
- China
- Prior art keywords
- rod
- supporting shoe
- hydraulic
- pile
- hydraulic cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229930091051 Arenine Natural products 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a hydraulic pile breaker. The hydraulic pile breaking device comprises a plurality of hydraulic pile breaking units, each hydraulic pile breaking unit comprises a hydraulic cylinder, a supporting shoe device, a pile breaking drill bit and a hydraulic cylinder connecting bracket, each supporting shoe device comprises a supporting shoe rod and a supporting shoe, each supporting shoe rod comprises a first rod part and a second rod part, an axial through hole is formed in the middle of each supporting shoe rod, the middle of each supporting shoe is provided with a through hole, each supporting shoe is connected to the front end part of each supporting shoe rod through threads, the first rod part of each supporting shoe rod is located in a cylinder barrel of the hydraulic cylinder and is sleeved on a piston rod of the hydraulic cylinder, a piston rod spring is arranged between the piston rod of the hydraulic cylinder and the supporting shoe rod, the hydraulic cylinder connecting bracket is fixedly connected to the outer side of an end cover of the hydraulic cylinder through bolts, the pile breaking drill bit is detachably connected to the front end of the piston rod of the hydraulic cylinder, and each hydraulic pile breaking unit is sequentially connected to each other through the hydraulic cylinder connecting bracket through mounting pins to form a circular structure.
Description
Technical Field
The invention relates to a hydraulic pile breaker, and belongs to the technical field of subway construction equipment.
Background
The fender pile construction can be carried out before the excavation of the subway construction foundation pit, so that the safety of the excavation work of the foundation pit in the later period is ensured. The pile foundation construction needs to be subjected to concrete filling, and when crown beam construction is carried out, pile heads are required to be broken to clean out the concrete filling in the pile foundation construction. At present, a manual drilling machine and a handheld hydraulic pile breaker are basically adopted for pile breaking. The traditional pile breaking construction efficiency is extremely low, the pile head is uneven in broken surface, the construction quality is poor, a large amount of dust can be generated in the construction process, and certain adverse effects are generated on the body of a construction worker. Therefore, the production of the pile breaking equipment with environmental protection, high efficiency and high working quality has great significance for the future pile foundation construction.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the hydraulic pile breaker which has high pile breaking construction efficiency, high construction quality and environmental protection.
The invention is realized by the following technical scheme: a hydraulic pile breaker is characterized in that: the hydraulic pile breaking device comprises a plurality of hydraulic pile breaking units, each hydraulic pile breaking unit comprises a single-acting hydraulic cylinder, a set of supporting shoe device, a pile breaking drill bit and a hydraulic cylinder connecting bracket, each supporting shoe device comprises a supporting shoe rod and a supporting shoe, each supporting shoe rod comprises a cylindrical first rod part and a cylindrical second rod part which are coaxially connected, the diameter of each first rod part is larger than that of each second rod part, the middle part of each supporting shoe rod is provided with an axial through hole which can accommodate the piston rod of the hydraulic cylinder to pass through, the middle part of each supporting shoe is provided with a through hole, the supporting shoe is connected with the front end part of the second rod part through threads, the first rod part of each supporting shoe rod is positioned in a cylinder barrel of the hydraulic cylinder and sleeved on a piston rod of the hydraulic cylinder, a piston rod spring is arranged between the piston rod of the hydraulic cylinder and the lower end of the first rod part of the supporting shoe rod, the hydraulic cylinder connecting bracket is fixedly connected with the outer side of the hydraulic cylinder through a bolt, the middle part of the hydraulic cylinder connecting bracket is provided with an axial through hole which can enable the piston rod of the supporting shoe rod to pass through the piston rod of the hydraulic cylinder, the piston rod is sleeved with the piston rod of the piston rod through the piston rod of the piston rod, and the piston rod is sleeved with the piston rod through the piston rod of the piston rod.
When the hydraulic pile supporting device works, after hydraulic oil is introduced into the hydraulic cylinder, a piston rod of the hydraulic cylinder moves forwards and pushes the supporting shoe rod to extend, and meanwhile, the supporting shoe rod is driven to extend forwards, and when the supporting shoe rod extends to a certain extent, the supporting shoe at the front end of the supporting shoe rod is contacted with the concrete pile; as the injection amount of hydraulic oil is increased, the supporting shoe spring is compressed to a certain extent, the piston rod spring starts to compress, and at the moment, the pile breaking drill bit extends out of the supporting shoe to contact the concrete pile to break the pile head; after pile head breaking is completed, hydraulic oil in the hydraulic cylinder flows out of the hydraulic cylinder in a reversing way, and the piston rod and the supporting shoe rod are pushed back to the original positions under the action of the piston rod spring and the supporting shoe spring, so that pile breaking is completed.
Further, the front end of the supporting boot is in an arc shape. The front end of the supporting shoe is in an arc shape, so that the supporting shoe can be fully contacted with the concrete pile, and the working reliability of the pile breaking machine is ensured.
Further, the front end face of the supporting boot is of a step-shaped structure. The front end face of the supporting shoe is of a step-shaped structure, when the supporting shoe is in contact with the periphery of a concrete pile, the supporting shoe can be in contact with a part of the concrete pile which is not required to be broken through the high-order face and fastened together, so that the phenomenon of integral jumping of the pile breaking machine caused by a pile breaking drill bit during pile breaking operation can be avoided, the flatness of the whole broken face of the pile breaking machine after pile breaking is completed is ensured, and the quality of pile breaking operation is improved.
Further, in order to ensure synchronous action of the hydraulic pile breaking units, it is preferable that the oil paths of the hydraulic cylinders of the hydraulic pile breaking units are connected in series.
Further, the hydraulic pile breaking units are nine in total.
The beneficial effects of the invention are as follows: according to the invention, a circular structure is formed by adopting a plurality of hydraulic pile breaking units, the axes of the hydraulic cylinders are positioned on the same plane, and the distances between the front ends of the hydraulic cylinders and the circle center of the circular structure are equal, so that the front ends of the hydraulic cylinders can be ensured to be contacted with the concrete pile body at the same time, and the outer breaking surface of the pile body is ensured to be positioned on the same circular surface in the pile breaking process; according to the invention, the supporting shoe device is arranged at the front end of the hydraulic cylinder, the supporting shoe can be pushed to extend out firstly through the piston rod of the hydraulic cylinder, so that the supporting shoe is contacted with the pile body and clamps the pile body before the pile breaking drill bit contacts the pile body, when the extending amount of the piston rod of the hydraulic cylinder is increased, the clamping force of the supporting shoe on the pile body is increased, and then the included angle between the pile breaking machine and the pile body can be adjusted automatically, so that the pile breaking machine is vertical to the pile body, the pile breaking drill bit can be vertically inserted into the pile body in the working process of the pile breaking machine, and the pile breaking quality is greatly improved. Meanwhile, in the working engineering of the pile breaker, the pile breaker can be fixed on the pile body by the supporting shoe clamping the pile body, so that the pile breaker is prevented from sliding in the working process, and the construction quality of the pile breaker is ensured. In addition, the power source for pile breaking is the static force function of the hydraulic cylinder, so that the noise and dust are small in the working process, and the pile breaking device can play a good role in environmental protection. The pile breaking construction method can ensure the engineering quality of the whole pile breaking construction, greatly improve the safety of the pile breaking construction process and have high practicability.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic structural view of a pile breaking unit according to the present invention;
FIG. 3 is a schematic view of the construction of the support shoe apparatus of the present invention;
FIG. 4 is a schematic view of the structure of the support shoe of the present invention;
FIG. 5 is an exploded view of the pile breaking bit and the piston rod of the hydraulic cylinder of the present invention;
FIG. 6 is a schematic illustration of the assembly of the hydraulic cylinder and support shoe apparatus of the present invention;
in the figure, 1 is a hydraulic cylinder oil inlet, 2 is a cylinder barrel, 3 is a piston rod, 4 is a piston rod spring, 5 is a supporting shoe rod, 51 is a first rod part, 52 is a second rod part, 6 is a supporting shoe spring, 7 is an end cover, 8 is a hydraulic cylinder connecting bracket, 9 is a supporting shoe, 10 is a pile breaking drill bit, and 11 is a mounting pin.
Detailed Description
The invention is further illustrated by the following non-limiting examples, in conjunction with the accompanying drawings:
as shown in the attached drawing, the hydraulic pile breaker comprises a plurality of hydraulic pile breaking units, wherein each hydraulic pile breaking unit comprises a single-acting hydraulic cylinder, a set of supporting shoe devices, a pile breaking drill bit (10) and a hydraulic cylinder connecting bracket (8). Shown in this embodiment are nine hydraulic pile breaking units. The hydraulic cylinder comprises a cylinder barrel 2, a piston rod 3 arranged in the cylinder barrel 2, and an end cover 7 arranged at the front end of the cylinder barrel 2, wherein a liquid inlet 1 is formed in the cylinder barrel 2. The supporting shoe device comprises a supporting shoe rod 5 and a supporting shoe 9, wherein the supporting shoe rod 5 comprises a cylindrical first rod part 51 and a cylindrical second rod part 52 which are coaxially connected, the diameter of the first rod part 51 is larger than that of the second rod part 52, and the inner diameter of a cylinder barrel 2 of a hydraulic cylinder with the diameter of the first rod part 51 is equivalent. The middle part of the supporting shoe rod 5 is provided with an axial through hole which penetrates through the first rod part 51 and the second rod part 52 axially and can be penetrated by the piston rod 3 of the hydraulic cylinder. The middle part of the supporting shoe 9 is provided with a through hole, the supporting shoe 9 is connected with the front end part of the second rod part 52 of the supporting shoe rod 5 through threads, and the supporting shoe 9 is coaxially arranged with the hydraulic cylinder. In the present embodiment, the front end of the support shoe 9 is in the shape of an arc, and the front end surface of the support shoe 9 is in a stepped structure. The first rod part 51 of the supporting shoe rod 5 is positioned in the cylinder barrel 2 of the hydraulic cylinder and sleeved on the piston rod 3 of the hydraulic cylinder, a piston rod spring 4 is arranged between the piston rod 3 of the hydraulic cylinder and the lower end of the first rod part 51 of the supporting shoe rod 5, and the piston rod spring 4 is sleeved on the piston rod 3. The hydraulic cylinder connecting bracket 8 is fixedly connected to the outer side of the end cover 7 of the hydraulic cylinder through bolts, and a through hole through which the second rod part 52 of the support shoe rod 5 can pass is formed in the middle of the hydraulic cylinder connecting bracket 8. A support shoe rod spring 6 which is sleeved on the second rod part 52 of the support shoe rod 5 is arranged between the support shoe rod 5 and the hydraulic cylinder connecting bracket 8. The pile breaking drill bit 10 is detachably connected to the front end of the piston rod 3 of the hydraulic cylinder. The spring force value of the support shoe rod spring 6 is set smaller than the spring force value of the piston rod spring 4. The hydraulic pile breaking units are sequentially connected with each other through the hydraulic cylinder connecting brackets 8 by using the mounting pins 11 to form a circular structure, the axes of all the hydraulic cylinders are positioned on the same plane, and the distances between the front ends of the hydraulic cylinders and the circle center of the circular structure are equal. For the convenience of connection, connecting plates are respectively arranged on the left side and the right side of each hydraulic cylinder connecting support 8, pin holes are formed in the connecting plates, and the mounting pins 11 are matched with the pin holes in the connecting plates to realize connection between hydraulic pile breaking units. In order to ensure the synchronous action of the hydraulic cylinders, the oil paths of the hydraulic cylinders of the hydraulic pile breaking units are connected in series. And an oil way of the hydraulic cylinder is connected with the configured hydraulic pump station.
When the hydraulic pump station works, hydraulic oil is injected into a cylinder barrel 2 of a hydraulic cylinder through an oil inlet 1 of the hydraulic cylinder, the hydraulic oil pushes a piston rod 3 to move, the piston rod 3 transmits the received force to a piston rod spring 4, the piston rod spring 4 transmits the force to a supporting shoe rod 5, and the supporting shoe rod 5 transmits the force to a supporting shoe spring 6. Since the spring force value of the support shoe spring 6 is smaller than the spring force value of the piston rod spring 4, the support shoe spring 6 is deformed first, so that the support shoe 5 is pushed to extend, and when the support shoe 5 extends to a certain extent, the support shoe 9 at the front end of the support shoe 5 is contacted with the concrete pile. Along with the increase of the injection amount of hydraulic oil, the piston rod spring 4 starts to compress when the supporting shoe spring 6 compresses to a certain extent, and at the moment, the pile breaking drill bit 10 extends out of the supporting shoe 9 to start to contact the concrete pile, so that pile head breaking work is performed. After pile head breaking is completed, the reversing valve of the pile breaker acts to enable the oil inlet 1 of the hydraulic cylinder to be communicated with an oil tank of the hydraulic pump station, and the piston rod 3 and the supporting shoe rod 5 are pushed back to the original positions under the action of the piston rod spring 4 and the supporting shoe spring 6, so that pile breaking is completed.
In the working process of the pile breaking machine, along with the movement of the piston rod 3, the extrusion force of the supporting shoe 9 on the concrete pile can be larger and larger, if the pile breaking machine and the pile body form a certain angle at the moment, the interaction force of the supporting shoe 9 and the concrete pile can enable the pile breaking machine and the pile body to be adjusted to be in a vertical state, so that the pile breaking drill bit 10 of each hydraulic cylinder of the pile breaking machine is ensured to be positioned on the same working surface, and the working quality of the initial state of pile breaking work is ensured.
When the pile breaking drill bit 10 extends out of the supporting shoe 9 to contact the concrete pile for pile head breaking work, the pile breaking machine contacts and fastens the part of the concrete pile which is not required to be broken through the high-order surface of the supporting shoe 9, so that the phenomenon of integral jumping of the pile breaking machine caused by the pile breaking drill bit 10 during pile breaking work is avoided, the flatness of the whole breaking surface of the pile breaking machine after pile breaking is finished is ensured, and the quality of pile breaking work is improved.
Other parts in this embodiment are all of the prior art, and are not described herein.
Claims (5)
1. A hydraulic pile breaker is characterized in that: the hydraulic pile breaking device comprises a plurality of hydraulic pile breaking units, each hydraulic pile breaking unit comprises a single-acting hydraulic cylinder, a set of supporting shoe device, a pile breaking drill bit (10) and a hydraulic cylinder connecting bracket (8), the supporting shoe device comprises a supporting shoe rod (5) and a supporting shoe (9), the supporting shoe rod (5) comprises a cylindrical first rod part (51) and a cylindrical second rod part (52) which are coaxially connected, the diameter of the first rod part (51) is larger than that of the second rod part (52), the middle part of the supporting shoe rod (5) is provided with an axial through hole which can allow a piston rod (3) of the hydraulic cylinder to pass through, the middle part of the supporting shoe (9) is provided with a through hole, the supporting shoe (9) is connected with the front end part of the second rod part (52) through threads, the first rod part (51) of the supporting shoe rod (5) is positioned in a cylinder barrel (2) of the hydraulic cylinder and sleeved on the hydraulic cylinder, the diameter of the first rod part (51) is larger than that of the second rod part (52) is provided with a piston rod (3) through which can be connected, the middle part of the supporting shoe (9) is provided with a piston rod (8) through the piston rod (5) through the through hole which the piston rod (5) is connected, the hydraulic pile breaking device is characterized in that a supporting shoe rod spring (6) sleeved on a second rod part (52) of the supporting shoe rod (5) is arranged between the supporting shoe rod (5) and the hydraulic cylinder connecting support (8), the pile breaking drill bit (10) is detachably connected to the front end of a piston rod (3) of the hydraulic cylinder, the spring force value of the supporting shoe rod spring (6) is smaller than that of the piston rod spring (4), all hydraulic pile breaking units are sequentially connected with each other through the hydraulic cylinder connecting support (8) by using mounting pins (11) to form a circular structure, and the axes of all the hydraulic cylinders are located on the same plane, and the distances between the front ends of the hydraulic cylinders and the circle centers of the circular structure are equal.
2. The hydraulic pile breaker according to claim 1, wherein: the front end of the supporting boot (9) is in an arc shape.
3. The hydraulic pile breaker according to claim 2, wherein: the front end face of the supporting boot (9) is of a step-shaped structure.
4. A hydraulic pile breaker according to claim 1 or 2 or 3, characterised in that: the oil paths of the hydraulic cylinders of the hydraulic pile breaking units are connected in series.
5. The hydraulic pile breaker according to claim 4, wherein: the hydraulic pile breaking units are nine in total.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810437127.8A CN108374417B (en) | 2018-05-09 | 2018-05-09 | hydraulic pile breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810437127.8A CN108374417B (en) | 2018-05-09 | 2018-05-09 | hydraulic pile breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108374417A CN108374417A (en) | 2018-08-07 |
| CN108374417B true CN108374417B (en) | 2023-08-25 |
Family
ID=63033150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810437127.8A Active CN108374417B (en) | 2018-05-09 | 2018-05-09 | hydraulic pile breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108374417B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1113478A1 (en) * | 1982-04-23 | 1984-09-15 | Benditkis Iosif Ya | Arrangement for cutting off pile heads |
| EP0384507A1 (en) * | 1989-02-23 | 1990-08-29 | Kent-Air Europa B.V. | Device for breaking off piles |
| JPH09177077A (en) * | 1995-12-26 | 1997-07-08 | Fujita Corp | Pile cutting device |
| CN2297482Y (en) * | 1995-11-20 | 1998-11-18 | 中山市第一建筑工程公司 | Hydraulic pile head crusher |
| CN202227348U (en) * | 2011-08-22 | 2012-05-23 | 玉柴桩工(常州)有限公司 | Concrete pile head breaking machine |
| CN203514317U (en) * | 2013-10-11 | 2014-04-02 | 邵柳泉 | Hydraulic pile breaking machine |
| CN203821879U (en) * | 2014-05-12 | 2014-09-10 | 国家电网公司 | Underpinning frame used for safely detaching load bearing wall |
| CN204570693U (en) * | 2015-04-30 | 2015-08-19 | 三峡大学 | A kind of pitching pile pile pulling device |
| CN204753591U (en) * | 2015-07-14 | 2015-11-11 | 福州德格索兰机械有限公司 | Broken stake machine of hydraulic pressure |
| JP2017075445A (en) * | 2015-10-13 | 2017-04-20 | 株式会社エーコー | Existing pile removal system |
| CN206800396U (en) * | 2017-04-24 | 2017-12-26 | 洛阳市政建设集团有限公司 | A kind of concrete filling pile head crusher |
| CN208293578U (en) * | 2018-05-09 | 2018-12-28 | 中铁十局集团第一工程有限公司 | A kind of hydraulic broken pile machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326906B (en) * | 2017-06-27 | 2019-02-01 | 扬州工业职业技术学院 | A kind of hydraulic oscillation crosswise intelligence auxiliary pressure pile-drawing machine of jet impulse type |
-
2018
- 2018-05-09 CN CN201810437127.8A patent/CN108374417B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1113478A1 (en) * | 1982-04-23 | 1984-09-15 | Benditkis Iosif Ya | Arrangement for cutting off pile heads |
| EP0384507A1 (en) * | 1989-02-23 | 1990-08-29 | Kent-Air Europa B.V. | Device for breaking off piles |
| CN2297482Y (en) * | 1995-11-20 | 1998-11-18 | 中山市第一建筑工程公司 | Hydraulic pile head crusher |
| JPH09177077A (en) * | 1995-12-26 | 1997-07-08 | Fujita Corp | Pile cutting device |
| CN202227348U (en) * | 2011-08-22 | 2012-05-23 | 玉柴桩工(常州)有限公司 | Concrete pile head breaking machine |
| CN203514317U (en) * | 2013-10-11 | 2014-04-02 | 邵柳泉 | Hydraulic pile breaking machine |
| CN203821879U (en) * | 2014-05-12 | 2014-09-10 | 国家电网公司 | Underpinning frame used for safely detaching load bearing wall |
| CN204570693U (en) * | 2015-04-30 | 2015-08-19 | 三峡大学 | A kind of pitching pile pile pulling device |
| CN204753591U (en) * | 2015-07-14 | 2015-11-11 | 福州德格索兰机械有限公司 | Broken stake machine of hydraulic pressure |
| JP2017075445A (en) * | 2015-10-13 | 2017-04-20 | 株式会社エーコー | Existing pile removal system |
| CN206800396U (en) * | 2017-04-24 | 2017-12-26 | 洛阳市政建设集团有限公司 | A kind of concrete filling pile head crusher |
| CN208293578U (en) * | 2018-05-09 | 2018-12-28 | 中铁十局集团第一工程有限公司 | A kind of hydraulic broken pile machine |
Non-Patent Citations (1)
| Title |
|---|
| 液压静力沉桩机夹桩机构研究设计;朱桂华;建筑机械(第02期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108374417A (en) | 2018-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204035610U (en) | Synchronously carry out the special equipment of the boring of railing ball and chambering process | |
| CN104162462B (en) | Hydraulic breaking hammer | |
| KR20150021415A (en) | Hydraulic punching device for hole machining of electric and electronic panel | |
| CN108374417B (en) | hydraulic pile breaker | |
| CN107234473B (en) | Quick press-fitting device and method for double-sided boring online bushing | |
| CN113404422B (en) | Hydraulic rock drill | |
| CN208293578U (en) | A kind of hydraulic broken pile machine | |
| CN203254139U (en) | Disassembly machine for mine car wheel rolling bearing outer ring | |
| CN110905420B (en) | A large-aperture pressure relief drilling rig | |
| CN209780748U (en) | A frequency-adjustable resonance hydraulic rock drill | |
| CN216227727U (en) | Part connecting positioning device with quick switching function | |
| CN114542064B (en) | Splitting machine for mine excavation | |
| CN202283662U (en) | Press mounting device for automobile pump shell | |
| CN213409943U (en) | Hydraulic pipe bending machine | |
| CN210359370U (en) | Hydraulic support pin shaft end face drilling power device | |
| CN204893022U (en) | Automatic horizontal drilling machine | |
| CN203899651U (en) | Hydraulic breaking hammer | |
| CN110924857B (en) | Hydraulic rock drill with retaining mechanism | |
| CN203184918U (en) | Pin pressing machine | |
| CN211218821U (en) | A safe drilling equipment for track construction | |
| CN109676176B (en) | Repairing and boring machine for hydraulic support shield beam | |
| CN211008691U (en) | Single hydraulic prop assembling frame | |
| CN109537932B (en) | Hand-held rescue breaking tool | |
| CN109024737B (en) | Breaking hammer using novel drill rod dismounting mode | |
| CN110843048B (en) | Positioning mechanism is used in processing of jumbo size log for agriculture and forestry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |