CN201890733U - Engineering machinery and hoisting device thereof - Google Patents

Engineering machinery and hoisting device thereof Download PDF

Info

Publication number
CN201890733U
CN201890733U CN2010205740989U CN201020574098U CN201890733U CN 201890733 U CN201890733 U CN 201890733U CN 2010205740989 U CN2010205740989 U CN 2010205740989U CN 201020574098 U CN201020574098 U CN 201020574098U CN 201890733 U CN201890733 U CN 201890733U
Authority
CN
China
Prior art keywords
gear
retarder
hydraulic motor
winding plant
reel
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.)
Expired - Lifetime
Application number
CN2010205740989U
Other languages
Chinese (zh)
Inventor
闻志君
梁守军
黄志文
郭燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing CRRC Heavy Industry Mechanics Co Ltd
Original Assignee
Beijing CSR Times Locomotive and Rolling Stock Mechanics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing CSR Times Locomotive and Rolling Stock Mechanics Co Ltd filed Critical Beijing CSR Times Locomotive and Rolling Stock Mechanics Co Ltd
Priority to CN2010205740989U priority Critical patent/CN201890733U/en
Application granted granted Critical
Publication of CN201890733U publication Critical patent/CN201890733U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Braking Arrangements (AREA)

Abstract

The utility model provides a hoisting device, including a reel (54), a decelerator (53) equipped in the reel (54), a first hydraulic motor (511), a second hydraulic motor (512) and a power transmitting device (52). The power output ends of the first hydraulic motor (511) and the second hydraulic motor (512) are respectively connected with a first power input end and a second power input end of the power transmitting device (52). The power output end of the power transmitting device (52) is connected with the power input end of the decelerator (53). The hoisting device employing the double-motor single decelerator is convenient to install while guaranteeing a high output torque. The utility model also provides an engineering plant which includes the hoisting device described in any one of above-mentioned items and has the advantages of the hoisting device.

Description

A kind of construction machinery and equipment and winding plant thereof
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of winding plant that is used for construction machinery and equipment.In addition, the utility model also relates to a kind of construction machinery and equipment that comprises above-mentioned winding plant.
Background technology
Along with the fast development of China's economic construction, market is for construction machinery and equipment, and particularly the demand of the construction machinery and equipment of high pulling torque output increases day by day.
In recent years, all kinds of foundation works of China are on the increase, large-scale camp site requires more and more higher for the output torque of construction machinery and equipment, construction machinery and equipment (for example rotary drilling rig) therefore commonly used is just big towards installed power, output torque big, maneuverability, direction that operating efficiency is high develop.
Rotary drilling rig is the construction machinery and equipment of pore-forming operation in a kind of suitable building foundation engineering.Mainly be suitable for soil layer constructions such as sand, cohesive soil, slity soil, in multiple foundation basic constructions such as bored concrete pile, diaphragm wall, strengthening of foundation, be used widely.Rotary drilling rig is made up of hydraulic efficiency pressure system, winding plant, drilling apparatus and electric control system usually.The winding plant of rotary drilling rig is the device that promotes drilling rod or other auxiliary construction instruments, and it is made up of several parts such as reel, elevator frame, reductor and HM Hydraulic Motor usually.By HM Hydraulic Motor the pressure of fluid can be converted to mechanical energy, after slowing down by retarder, drive reel and rotate, thereby realize retractable operation steel rope.
Winding plant of the prior art mainly contains single motor list reductor winding plant, double motor dual reducer winding plant, below respectively these two kinds of winding plants is simply introduced.
Please refer to Fig. 1, Fig. 1 is the structural representation of single motor list retarder winding plant in the prior art.
As shown in Figure 1, this winding plant comprises HM Hydraulic Motor 11, elevator frame 12, retarder 13, reel 14.Retarder 13 right side flanges are by on the end face that is bolted to reel 14 left side flanges, retarder 13 left side flanges are by being bolted on the elevator frame 12, HM Hydraulic Motor 11 bolt togethers are at the power intake of retarder 13, reel 14 right side flanges are connected with elevator frame 12 with end support seat 15 by supporting revolving shaft 16, supporting revolving shaft 16 left sides and reel 14 bolt ups together, the right side is supported on the end support seat 15.Adopt the winding plant of this structure,, can only provide less moment of torsion, can not be applicable to large-scale construction machinery and equipment owing to have only a HM Hydraulic Motor 11.
Please refer to Fig. 2, Fig. 2 is the structural representation of double motor dual reducer winding plant in the prior art.
As shown in Figure 2, the two reductor master winches of this double motor mainly are made up of elevator frame 21, first HM Hydraulic Motor 221, second HM Hydraulic Motor 222, first retarder 231, second retarder 232, reel 24 etc.At master winch assembly left end, reel 24 is fixed on the flange of first retarder 231, the left side flange of first retarder, 231 relative motions is by being bolted on the cydariform external gear 252, cooperate the inner gear of installing 251 to be fixed on the elevator frame 21 by bolted connection with cydariform external gear 252, first HM Hydraulic Motor 221 is by the power intake of bolted connection at first retarder 231.In the right side connection mode of main winch assembly, reel 24 is by being bolted on second retarder, 232 flanges, and the flange of second retarder, 232 relative motions is by being bolted on the elevator frame 21.
The hoisting mechanism of double motor dual reducer structure, output torque is big, can satisfy the requirement of the big hoisting force of master winch, is suitable for all kinds of large-scale engineering machineries.Yet, adopt the winding plant of double motor dual reducer structure, after second retarder 232 is installed, first retarder 231 could be installed during installation, cydariform inner gear 251 should align with the gear teeth of cydariform external gear 252 when first retarder 231 was installed, align with elevator frame 21 fixed orifices again, because two side speed reducers all have normally engaged brake, if do not unclamp the drg of second retarder 232, the installation of cydariform inner gear 251 is difficulty very.And HM Hydraulic Motor is installed in the both sides of retarder, nearly two meters of the master winch length of large-scale engineering machinery, and corresponding hydraulic tubing is arranged also corresponding complexity.
Therefore, how improving the structure of existing winding plant, make it guaranteeing also have advantage easy for installation under the enough big situation of output torque, is the present technical issues that need to address of those skilled in the art.
The utility model content
The purpose of this utility model provides a kind of winding plant that is used for construction machinery and equipment, and this winding plant can guarantee also have advantage easy for installation under the enough big situation of output torque.Another purpose of the present utility model provides a kind of construction machinery and equipment that comprises above-mentioned winding plant.
For solving the problems of the technologies described above, the utility model provides a kind of winding plant, comprises reel, is installed on reel in-to-in retarder; Also comprise first HM Hydraulic Motor, second HM Hydraulic Motor, power drive; The clutch end of the clutch end of described first HM Hydraulic Motor, described second HM Hydraulic Motor is connected with first power intake, second power intake of described power drive respectively, and the clutch end of described power drive is connected with the power intake of described retarder.
Preferably, described power drive is a gear system.
Preferably, described gear system comprise first gear, second gear and with described first gear, described second gear ingear the 3rd gear simultaneously; The transmission shaft of described first gear is connected with the clutch end of described first HM Hydraulic Motor, the transmission shaft of described second gear is connected with the clutch end of described second HM Hydraulic Motor, and the transmission shaft of described the 3rd gear is connected with the power intake of described retarder.
Preferably, described first gear, second gear and the 3rd gear are spur wheel.
Preferably, described first gear, second gear and the 3rd gear are helical wheel.
Preferably, described winding plant also comprises frame, and the right side flange of described retarder is fixed on the described frame by bolted connection.
Preferably, described reel inwall is provided with protruding ring, and described retarder is supported on the described protruding ring, and its left side flange is fixed on the described reel by bolted connection.
The winding plant that the utility model provides comprises first HM Hydraulic Motor, second HM Hydraulic Motor, power drive; The clutch end of the clutch end of described first HM Hydraulic Motor, described second HM Hydraulic Motor is connected with first power intake, second power intake of described power drive respectively, and the clutch end of described power drive is connected with the power intake of described retarder.
During work, two HM Hydraulic Motor provide power simultaneously, through the power drive between the driving device of drg and described retarder, two less motor torsional moments are merged into a big moment of torsion.This torque drive retarder rotates, and rotates thereby drive the reel that is fixed together with retarder, for winding plant provides enough big hoisting force, satisfies the needs of large-scale engineering machinery.Because double motor all is installed on the power intake of cylinder and the inside that retarder is positioned at reel, only need during installation earlier retarder to be installed on the reel, the dynamic assembly part of forming winding plant, it is hung in the frame inner chamber, move right again, the support level of retarder right side flange is stretched in the frame right ports, with bolt motivation transfer motion part right side and frame are fixed, hole by the frame left side is fixed on strut member on the reel then, at last the end support pedestal is inserted in supporting revolving shaft, and install and frame bonded assembly bolt of rear end plate, finish the work that the long part of hoisting mechanism installs to short frame.
This shows, adopt the winding plant of above-mentioned double motor list retarder, guaranteeing also have advantage easy for installation under the enough big prerequisite of output torque.
The utility model also provides a kind of construction machinery and equipment, is provided with above-mentioned each described winding plant.Because above-mentioned winding plant possesses above-mentioned technique effect, the construction machinery and equipment with above-mentioned winding plant also should possess the corresponding techniques effect.
Preferably, above-mentioned construction machinery and equipment is specially rotary drilling rig.
Description of drawings
Fig. 1 is the structural representation of single motor list retarder winding plant in the prior art;
Fig. 2 is the structural representation of double motor dual reducer winding plant in the prior art;
Fig. 3 is the structural representation of a kind of specific embodiment of winding plant that the utility model provides;
Fig. 4 is the right elevation of Fig. 3;
Fig. 5 is the transmission sketch of Fig. 3.
The specific embodiment
Core of the present utility model provides a kind of winding plant that is used for construction machinery and equipment, and this winding plant is guaranteeing also have advantage easy for installation under the enough big prerequisite of output torque.Another core of the present utility model provides a kind of construction machinery and equipment that comprises above-mentioned winding plant.
In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 3 and Fig. 5, Fig. 3 is the structural representation of a kind of specific embodiment of winding plant that the utility model provides; Fig. 5 is the transmission sketch of Fig. 3.
In a kind of specific embodiment, above-mentioned winding plant comprises frame 56, reel 54, is arranged at reel 54 in-to-in retarders 53, drg 55, first HM Hydraulic Motor 511, second HM Hydraulic Motor 512 and power drive 52.Frame 56 is used for placing other each system and devices as base, and reel 54 is used for twining and discharging the steel rope of winding plant, and retarder 53 is recently controlled the hoisting speed of winding plant by gear mesh or the definite different transmission of worm and gear engagement.The clutch end of the clutch end of first HM Hydraulic Motor 511, second HM Hydraulic Motor 512 is connected (as shown in Figure 4) with first power intake, second power intake of power drive 52 respectively, and the clutch end of power drive 52 is connected with the power intake of retarder 53.
Adopt such structure, above-mentioned winding plant is when in running order, two HM Hydraulic Motor provide power simultaneously, through the power drive 52 between the driving device of drg 55 and described retarder 53, two less motor torsional moments are merged into a big moment of torsion.This torque drive retarder 53 rotates, and rotates thereby drive the reel 54 that is fixed together with retarder 53, for winding plant provides enough big hoisting force, satisfies the needs of large-scale engineering machinery.Because double motor all is installed on the power intake of cylinder 54 and the inside that retarder 53 is positioned at reel 54, only need during installation earlier retarder 53 to be installed on the reel 54, the dynamic assembly part of forming winding plant, it is hung in frame 56 inner chambers, move right again, the support level of retarder 53 right side flanges is stretched in frame 56 right ports, with bolt that motivation transfer motion part right side and frame 56 is fixing, by frame 56 left hole strut member 57 is fixed on the reel 54 then, install at last and frame 56 bonded assembly bolt of rear end plates, just can finish the work that the long part of hoisting mechanism installs to short frame.
This shows, adopt the winding plant of above-mentioned double motor list retarder, guaranteeing also have advantage easy for installation under the enough big prerequisite of output torque.
Further, above-mentioned power drive 52 can be gear system.Gear transmission utilizes the gear teeth of driving wheel, flower wheel two gears be meshing with each other direct transferring power and motion, have stable drive, transmitting ratio accurately, characteristics such as reliable operation, efficient height, life-span power, speed and range of sizes long, that use be big.
Particularly, as shown in Figure 5, the said gear driving device can comprise first gear 521 and second gear 522, and with first gear 521, second gear 522 ingear the 3rd gear 523 simultaneously.The transmission shaft of first gear 521 is connected with the clutch end of first HM Hydraulic Motor 511, and the transmission shaft of second gear 522 is connected with the clutch end of second HM Hydraulic Motor 512, and the transmission shaft of the 3rd gear 523 is connected with the power intake of described retarder 53.
The transmission shaft of first gear 521 is connected the moment of torsion that has guaranteed first HM Hydraulic Motor 511 and passes to first gear 521 with the clutch end of first HM Hydraulic Motor 511; The transmission shaft of second gear 522 is connected the moment of torsion that has guaranteed second HM Hydraulic Motor 512 and passes to second gear 522 with the clutch end of second HM Hydraulic Motor 512; The 3rd gear 523 and first gear 521, second gear 522 mesh simultaneously and have guaranteed two less moments of torsion are merged into a high pulling torque; The high pulling torque that the transmission shaft of the 3rd gear 523 is connected after having guaranteed to merge with the power intake of described retarder 53 passes to retarder, rotates to drive retarder.
In scheme further, above-mentioned first gear 521, second gear 522, the 3rd gear 523 can be spur wheel.Owing to adopted spur wheel, the transmission shaft of each gear can be parallel to each other, space that like this can the saving in power driving device, and the tooth force face of straight gear be along gear wheel shaft to being distributed in widths over teeth, have the simple advantage of manufacturing.
In the winding plant that the utility model provides, above-mentioned power drive is not limited to gear system, can also be chain gearing.
In the another kind of specific embodiment, this chain gearing can comprise a chain, be positioned at first sprocket wheel, second sprocket wheel that a side is arranged side by side, and the 3rd sprocket wheel that is positioned at opposite side.The turning cylinder of first sprocket wheel connects the mouth of first HM Hydraulic Motor 511, and the turning cylinder of second sprocket wheel connects the mouth of second HM Hydraulic Motor 512, the input end of the turning cylinder connection reducer 53 of the 3rd sprocket wheel; The chain and first sprocket wheel, second sprocket wheel and the 3rd sprocket wheel mesh simultaneously.First sprocket wheel, the second sprocket wheel constant speed are rotated in the same way, drive chain and rotate, and the chain of rotation drives the 3rd sprocket rotation.In the chain-driving of this structure, first sprocket wheel, second sprocket wheel pass to the 3rd sprocket wheel with the output torque of first HM Hydraulic Motor 511, second HM Hydraulic Motor 512, merge into a high pulling torque, export to retarder 53.
Above-mentioned chain gearing also can comprise first chain, second chain that be arranged in parallel, first sprocket wheel that is arranged side by side, second sprocket wheel, and the 3rd sprocket wheel with first gear, second gear.The turning cylinder of first sprocket wheel connects the mouth of first HM Hydraulic Motor 511, and the turning cylinder of second sprocket wheel connects the mouth of second HM Hydraulic Motor 512, the input end of the turning cylinder connection reducer 53 of the 3rd sprocket wheel; The two ends of first chain are respectively at first gear mesh of first sprocket wheel, the 3rd sprocket wheel, and the two ends of second chain are respectively at second gear mesh of second sprocket wheel, the 3rd sprocket wheel.First sprocket wheel, the second sprocket wheel constant speed are rotated in the same way, drive chain and rotate, and the chain of rotation drives the 3rd sprocket rotation.
In the chain-driving of this structure, first sprocket wheel passes to the output torque of first HM Hydraulic Motor 511 first gear of the 3rd sprocket wheel, second sprocket wheel passes to the output torque of second HM Hydraulic Motor 512 second gear of the 3rd sprocket wheel, first gear of the 3rd sprocket wheel, second gear merge two moments of torsion, export to retarder 53.Certainly, also above-mentioned the 3rd sprocket wheel with double gear the 3rd sprocket wheel, the 4th sprocket wheel that is installed on same transmission shaft can be replaced with, identical technique effect can be reached equally.
All can all should be in protection domain of the present utility model with transmission of power to the power drive of retarder of first HM Hydraulic Motor, second HM Hydraulic Motor.
Need to prove that the said gear driving device is not limited to three gears and is meshing with each other, can also a plurality of gears be meshing with each other and carry out the power transmission.All can all should be in protection domain of the present utility model with transmission of power to the gear system of retarder of first HM Hydraulic Motor, second HM Hydraulic Motor.
Above-mentioned first gear 521, second gear 522, the 3rd gear 523 also are not limited to spur wheel, can also be helical wheel, helical gear each engaging-in nibbling out to the gear teeth all is gradually, does not have the mesh impact phenomenon, operating ratio is more steady, guarantees that easily transmitting ratio is constant.All can all should be in protection domain of the present utility model with transmission of power to the gear of retarder of first HM Hydraulic Motor, second HM Hydraulic Motor.
In the another kind of specific embodiment, the right side flange of above-mentioned retarder 53 can be fixed on the described frame 56 by bolted connection.That bolted connection has is simple in structure, it is reliable to connect, easy accessibility, advantage that cost is low.Certainly, the right side flange of above-mentioned retarder 53 also can be connected with frame 56 by other modes, and for example bearing pin connects.
Further, above-mentioned reel 54 inwalls can be provided with protruding ring, described retarder 53 is supported on the protruding ring, make retarder 53 more stably be supported in reel 54 inside, help the installation of retarder 53, can effectively reduce the vibration of retarder 53 in rotation process, also save the lateral length of whole winding plant greatly.Above-mentioned retarder 53 left side flanges are fixed on the described reel 54 by bolted connection, connect reliably easy accessibility.
The utility model also provides a kind of construction machinery and equipment, comprises above-mentioned winding plant, in order to promote other devices of this project machinery.Because above-mentioned winding plant possesses above-mentioned technique effect, the construction machinery and equipment with above-mentioned winding plant also should possess the corresponding techniques effect.
Particularly, above-mentioned construction machinery and equipment can be a rotary drilling rig, comprises above-mentioned winding plant, is used for promoting drilling rod and other auxiliary construction instrument.Certainly, above-mentioned construction machinery and equipment also can be miscellaneous equipment, for example hoisting crane.
More than construction machinery and equipment provided by the utility model and winding plant thereof are described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.

Claims (9)

1. a winding plant comprises reel (54), is installed on reel (54) in-to-in retarder (53); It is characterized in that, also comprise first HM Hydraulic Motor (511), second HM Hydraulic Motor (512), power drive (52); The clutch end of the clutch end of described first HM Hydraulic Motor (511), described second HM Hydraulic Motor (512) is connected with first power intake, second power intake of described power drive (52) respectively, and the clutch end of described power drive (52) is connected with the power intake of described retarder (53).
2. winding plant according to claim 1 is characterized in that, described power drive (52) is a gear system.
3. winding plant according to claim 2, it is characterized in that, described gear system comprise first gear (521), second gear (522) and with described first gear (521), described second gear (522) ingear the 3rd gear (523) simultaneously; The transmission shaft of described first gear (521) is connected with the clutch end of described first HM Hydraulic Motor (511), the transmission shaft of described second gear (522) is connected with the clutch end of described second HM Hydraulic Motor (512), and the transmission shaft of described the 3rd gear (523) is connected with the power intake of described retarder (53).
4. according to each described winding plant of claim 3, it is characterized in that described first gear (521), second gear (522) and the 3rd gear (523) are spur wheel.
5. according to each described winding plant of claim 3, it is characterized in that described first gear (521), second gear (522) and the 3rd gear (523) are helical wheel.
6. according to each described winding plant of claim 1-5, it is characterized in that also comprise frame (56), the right side flange of described retarder (53) is fixed on the described frame (56) by bolted connection.
7. according to each described winding plant of claim 1-5, it is characterized in that, described reel (54) inwall is provided with protruding ring, and described retarder (53) is supported on the described protruding ring, and the left side flange of described retarder (53) is fixed on the described reel (54) by bolted connection.
8. a construction machinery and equipment is characterized in that, is provided with each described winding plant of claim 1-7.
9. construction machinery and equipment according to claim 8 is characterized in that this project machinery is specially rotary drilling rig.
CN2010205740989U 2010-10-22 2010-10-22 Engineering machinery and hoisting device thereof Expired - Lifetime CN201890733U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205740989U CN201890733U (en) 2010-10-22 2010-10-22 Engineering machinery and hoisting device thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205740989U CN201890733U (en) 2010-10-22 2010-10-22 Engineering machinery and hoisting device thereof

Publications (1)

Publication Number Publication Date
CN201890733U true CN201890733U (en) 2011-07-06

Family

ID=44220209

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010205740989U Expired - Lifetime CN201890733U (en) 2010-10-22 2010-10-22 Engineering machinery and hoisting device thereof

Country Status (1)

Country Link
CN (1) CN201890733U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102145863A (en) * 2010-10-22 2011-08-10 北京南车时代机车车辆机械有限公司 Engineering machinery and winching device thereof
CN102344095A (en) * 2011-07-15 2012-02-08 恒天九五重工有限公司 Double-speed reducer winch
EP2785953A1 (en) * 2011-12-02 2014-10-08 Services Pétroliers Schlumberger Quick drum connect
CN114291754A (en) * 2022-01-05 2022-04-08 江苏大学 Auxiliary lifting device structure of dynamic compaction machine and control method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102145863A (en) * 2010-10-22 2011-08-10 北京南车时代机车车辆机械有限公司 Engineering machinery and winching device thereof
CN102344095A (en) * 2011-07-15 2012-02-08 恒天九五重工有限公司 Double-speed reducer winch
EP2785953A1 (en) * 2011-12-02 2014-10-08 Services Pétroliers Schlumberger Quick drum connect
EP2785953A4 (en) * 2011-12-02 2015-04-22 Services Petroliers Schlumberger Quick drum connect
CN114291754A (en) * 2022-01-05 2022-04-08 江苏大学 Auxiliary lifting device structure of dynamic compaction machine and control method

Similar Documents

Publication Publication Date Title
CN105970896B (en) A kind of ocean platform electric gear rack lifting mechanism
CN201890733U (en) Engineering machinery and hoisting device thereof
CN101135171A (en) Track-mounted electric rotary drill
CN201339476Y (en) Duct piece installation machine
CN104925689A (en) Novel hoisting mechanism
CN201292776Y (en) Ocean oil drilling platform derrick
CN202558518U (en) Mechanical-hydraulic combined winding device
CN102145863B (en) Engineering machinery and winching device thereof
CN202107466U (en) Hydraulic winch control device for workover rig
CN104129729A (en) Hoist with double winding drums
CN104353765B (en) A kind of diaphram wall bar-mat reinforcement interweaving machine
CN105735890A (en) Core drill
WO2010063171A1 (en) A top mounted tower type nc pumping unit
CN203270539U (en) Self-elevating type marine drilling platform lifting device
CN215854813U (en) Novel haulage winch
CN201448051U (en) Hoister of rotary drilling rig and connection structure thereof
CN103510891B (en) A kind of connecting pipes injection head driving device
CN206942659U (en) A kind of flywheel energy storage self power generation Self propelled type well repairing machine
CN212559189U (en) Piping lane installation complementary unit
CN202785424U (en) Double-drum hoisting synchronizing mechanism of engineering driller
CN103241683A (en) Rail type pipe lifting device of lower pipes of balancing weight production line of marine pipeline
CN203284021U (en) High-power mine hydraulic anti-explosion elevator
CN201850079U (en) Hoisting machine
CN201553562U (en) Bracket-type crane
CN204646089U (en) Rotary drilling rig

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee
CP01 Change in the name or title of a patent holder

Address after: 102249 Beijing ChangPing Railway Station, west of Changping District, 500 meters

Patentee after: Beijing CRRC Heavy Industry Mechanics Co., Ltd.

Address before: 102249 Beijing ChangPing Railway Station, west of Changping District, 500 meters

Patentee before: Beijing CSR Times Heavy Industry Machinery Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20110706

CX01 Expiry of patent term