CN104005738A - Tower type oil pumping unit - Google Patents
Tower type oil pumping unit Download PDFInfo
- Publication number
- CN104005738A CN104005738A CN201410267778.9A CN201410267778A CN104005738A CN 104005738 A CN104005738 A CN 104005738A CN 201410267778 A CN201410267778 A CN 201410267778A CN 104005738 A CN104005738 A CN 104005738A
- Authority
- CN
- China
- Prior art keywords
- traction sheave
- steel cable
- oil pumping
- type oil
- pumping machine
- 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.)
- Pending
Links
Landscapes
- Jib Cranes (AREA)
Abstract
The invention provides a tower type oil pumping unit which is high in transmission efficiency and not prone to slipping. The tower type oil pumping unit comprises a rack, a work platform is arranged at the upper end of the rack, a motor, a speed reducer and a traction sheave are arranged on the work platform and are connected together in sequence, the motor and a transmission shaft of the speed reducer are coaxial with the traction sheave after the motor, the speed reducer and the traction sheave are connected, a loading steel rope and a balance steel rope are wound on the traction sheave, one end of the loading steel rope is fixedly arranged on the traction sheave, and is wound on the traction sheave according to the preset number of turns, one end of the balance steel rope is fixedly arranged on the traction sheave, and is wound on the traction sheave according to the preset number of turns, and the winding direction of the loading steel rope on the traction sheave is opposite to that of the balance steel rope on the traction sheave. Due to the fact that the motor, the speed reducer, a coupler and the traction sheave are connected coaxially, the transmission efficiency of the motor is higher, meanwhile, due to the fact that the loading steel rope and the balance steel rope are respectively and fixedly wound on the traction sheave, slipping cannot easily occurs to the loading steel rope, the balance steel rope and the traction sheave, and the structure is simpler.
Description
Technical field
The present invention relates to a kind of oil exploration equipment, especially a kind of tower shelf type oil pumping machine.
Background technology
At present the existing most of oil field of China is through the Bian that opens for these years, oil well has entered the middle and later periods and has opened the Bian stage, the Bian oil degree of depth increases, oil viscosity and increasing containing sand, moisture content, bring more difficulty to oil production equipment, the deep-well Bian oil of the most applicable long stroke of tower shelf type oil pumping machine, low jig frequency is the preferably selection of applying.
Traditional tower shelf type oil pumping machine, motor is connected with reducer by belt, and reducer is connected with traction sheave again, and this Multi-stage transmission mode makes the transmission efficiency of motor lower, wastes energy.In addition, the tower shelf type oil pumping machine of transmission is only provided with a steel cable, steel cable curls up on traction sheave, one end is connected with counterweight case, and the other end is connected with sucker rod, when operation, traction sheave does clockwise or anticlockwise rotation under the drive of motor, counterweight case and sucker rod do two-way the turning that rises or decline and raise motion under the drive of steel cable, rely on frictional force to carry out transmission between steel cable and traction sheave completely, and skidding easily occurs.
Chinese utility model patent ZL201220620100.0 discloses a kind of without impacting tower shelf type oil pumping machine, comprise pylon, traction machine, traction machine is connected with traction sheave by belt pulley or gear reduction, traction sheave is by transmission mechanism and sucker rod, balancing weight is associated, described transmission mechanism comprises the combination guide wheel of the both sides of being located at respectively traction sheave, assembly pulley, described combination guide wheel is by coaxial large guide wheel, little guide wheel composition, described assembly pulley comprises the fixed pulley group and the corresponding running block that are fixed on pylon, between traction sheave and large guide wheel and assembly pulley, be respectively equipped with flat pull rope for transmission, and between little guide wheel and sucker rod, be also provided with pull rope.What but this oil pumper adopted is flat pull rope, easily wearing and tearing and cracking, this oil pumper has too many transmission mechanism simultaneously, this multilevel transmission structure can make the efficiency of motor transmission reduce step by step, cause waste, and pulley more easily produces skidding too much, still have further improved space.
Summary of the invention
The object of the present invention is to provide a kind of transmission efficiency high, be difficult for skidding and tower shelf type oil pumping machine simple in structure.
To achieve these goals, the present invention adopts following technical scheme:
A kind of tower shelf type oil pumping machine, comprise frame, described frame upper end is provided with working platform, the motor being connected in turn is installed on described working platform, reducer and traction sheave, described motor after connection and the power transmission shaft of described reducer are coaxial with described traction sheave, on described traction sheave, be wound with heavy burden steel cable and balance steel cable, described heavy burden steel cable one end is fixed on described traction sheave, and be wound on described traction sheave by pre-fixing turn, the other end is connected with sucker rod by polished rod eye, described balance steel cable one end is fixed on described traction sheave, and be wound on described traction sheave by pre-fixing turn, the other end is fixedly connected with counterweight case, described heavy burden steel cable is contrary with the coiling direction of described balance steel cable on described traction sheave.
Adopt technique scheme, because motor is directly coaxially connected with reducer, reducer is coaxially connected with traction sheave, do not need the transmission through other transmission mechanisms, the transmission efficiency of motor is higher, simultaneously, because heavy burden steel cable and balance steel cable are to fix respectively and be wound on traction sheave, there is no each other direct moment transmission, be difficult for and traction sheave generation skidding, structure is also simpler.
As a further improvement on the present invention, tower shelf type oil pumping machine of the present invention also comprises shaft coupling, between described reducer and described traction sheave, connects by shaft coupling, and the turning cylinder of described shaft coupling is coaxial with described traction sheave.It is the effect of dynamic property that shaft coupling can play buffering, vibration damping and raising axle, because the turning cylinder after its connection is also coaxial with traction sheave, can not reduce the transmission efficiency of motor.
As a further improvement on the present invention, described frame lower end is provided with buffer, and described frame is also provided with the chute sliding for described counterweight case between described working platform and described buffer.Buffer can prevent when unexpected, and the impact force that counterweight case freely falling body produces damages frame; Chute can guarantee that the track that counterweight case moves up and down is controlled.
As a further improvement on the present invention, on described counterweight case, be provided with the pulley coordinating with described chute.By coordinating of pulley and chute, avoid the operating efficiency of the whole oil pumper of drag effects that counterweight case produces in the time that chute slides.
As a further improvement on the present invention, described heavy burden steel cable has two, is connected to the two ends of described polished rod eye, is provided with regulating block in the middle of described polished rod eye, in the middle of described regulating block, be provided with the perforation for described sucker rod is installed, the direction of described perforation is always vertical direction.Because the direction of perforation is always vertical direction, while avoiding two heavy burden steel cable length inconsistent, cause sucker rod crooked, affect the operating efficiency of oil pumper.
As a further improvement on the present invention, described counterweight case comprises the balancing weight of one or more standard weights.By counterweight case is arranged to the balancing weight by standard weights, user can arrange the weight of counterweight case as required.
As a further improvement on the present invention, described heavy burden steel cable and described balance steel cable are that multilayer strand does not rotate steel cable, and described reducer is planetary reduction gear.Multilayer strand does not rotate steel cable can effectively prevent from bearing a heavy burden steel cable and balance steel cable contingent helical rotation when stressed, makes the stressed more stable of traction sheave; Compared with other types reducer, planetary reduction gear, owing to having a sun gear, can allow sun gear coaxial with power transmission shaft and the traction sheave of motor when installation, and transmission efficiency is higher.
As a further improvement on the present invention, also comprise pedestal and support bar, described pedestal, described support bar and described frame are hinged between two, and are launched into triangle.Triangular structure can form stable support to frame.
As a further improvement on the present invention, described support bar comprises two stocks and the joint being connected with two described stock spirals respectively.By above-mentioned improvement, support bar is arranged to two-part, after dismounting joint, can fold.
As a further improvement on the present invention, described frame upper end is also provided with guardrail, goes along with sb. to guard him residence and state working platform when described guardrail is vertically placed, and when horizontal positioned, flushes with described working platform.By above-mentioned improvement, in the time of the larger working platform of needs, can, by guardrail horizontal positioned, use as working platform, while needs, it is vertically placed to its protective action.
Brief description of the drawings
Fig. 1 is the structural representation of tower shelf type oil pumping machine of the present invention;
Fig. 2 is the working platform arrangement schematic diagram of tower shelf type oil pumping machine of the present invention;
Fig. 3 is the structural representation schematic diagram of the polished rod eye of tower shelf type oil pumping machine of the present invention.
In figure, corresponding sign is as follows:
1-frame; 2-working platform;
3-motor; 4-reducer;
5-shaft coupling; 6-traction sheave;
7-heavy burden steel cable; 8-balance steel cable;
9-polished rod eye; 9a-body;
9b-regulating block; 9c-groove;
9d-perforation; 9e-clip;
9f-perforation; 10-sucker rod;
11-counterweight case; 11a-pulley;
12-buffer; 13-chute;
14-pedestal; 15-support bar;
15a-stock; 15b-joint;
16-guardrail; 17-directive wheel.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
As shown in Figure 1, the tower shelf type oil pumping machine that the present embodiment provides, comprises frame 1, and frame 1 is tower-type and vertically placement, and its upper end is provided with working platform 2 and guardrail 16, is provided with motor 3 on working platform 2.Can be for being rotatably connected between guardrail 16 and frame 1, also can be to be fixedly connected with, when between guardrail 16 and frame 1 when being rotatably connected, guardrail 16 can vertically be placed, also can horizontal positioned, the placement direction that is guardrail 16 can be vertical with working platform 2, also can be parallel with working platform 2.In the time that guardrail 16 is vertically placed, can go along with sb. to guard him working platform 2, in the time of its horizontal positioned, flush with working platform 2, can be used as the extension of platform.In the present embodiment, guardrail 16 has four, be separately positioned on the four direction all around of working platform 2, only be provided with between the guardrail 16 of a side of motor 3 and frame 1 as being rotatably connected, between guardrail 16 in other three directions and frame 1 for being fixedly connected with, so both the conveniently maintenance to motor 3, had the safety that can ensure staff.
As described in Figure 2, the motor 3, reducer 4, shaft coupling 5 and the traction sheave 6 that are connected in turn are installed on working platform 2, the power transmission shaft of the motor 3 after connection and reducer 4, shaft coupling 5 is coaxial with traction sheave 6, be the turning cylinder of motor 3, reducer 4, shaft coupling 5 and traction sheave 6 all on same straight line, this coaxial direct-drive type connected mode has higher transmission efficiency.Motor 3, reducer 4, shaft coupling 5 and traction sheave 6 can be selected as required from prior art, and in the present embodiment, motor 3 adopts servomotor, can under the control of control system, carry out clockwise or anticlockwise rotation; Reducer 4 adopts planetary reduction gear, and compared with the reducer of other types, planetary reduction gear, owing to having a sun gear, can allow sun gear coaxial with power transmission shaft and the traction sheave of motor when installation, and transmission efficiency is higher.
On traction sheave 6, be wound with heavy burden steel cable 7 and balance steel cable 8, heavy burden steel cable 7 one end are fixed on traction sheave 6, and are wound on traction sheave 6 by pre-fixing turn, the other end be connected with sucker rod 10 by polished rod eye 9; Balance steel cable 8 one end are fixed on traction sheave 6, and be wound on traction sheave 6 by pre-fixing turn, the other end is fixedly connected with counterweight case 11, and polished rod eye 9, sucker rod 10 and balance ballast box 11 are all positioned at the below of traction sheave 6, and is suspended on respectively on heavy burden steel cable 7 and balance steel cable 8.Heavy burden steel cable 7 is contrary with the coiling direction of balance steel cable 8 on traction sheave 6, and the coiling number of turns on traction sheave 6 can arrange according to actual needs.In the present embodiment, in order to make there are enough spacing between sucker rod 10 and balance ballast box 7, also on support 1, be provided with the directive wheel 17 for changing heavy burden steel cable 7 directions of motion, heavy burden steel cable 7 is from traction sheave 6 is drawn, after directive wheel 17 guiding, be connected with sucker rod 10 again, like this, do not need traction sheave 6 to design to such an extent that can ensure there are enough spacing between sucker rod 10 and balance ballast box 11 too greatly yet.Certainly, directive wheel 17 also can act on balance steel cable 8, no longer describes in detail herein.
Counterweight case 11 comprises the balancing weight of one or more standard weights, and user can increase or remove balancing weight according to the weight of needed counterweight case, and its mode of occupation is similar to counterweight.
As shown in Figure 3, polished rod eye 9 comprises body 9a and is arranged on the regulating block 9b on body 9a, heavy burden steel cable 7 has two, be connected to the two ends of the body 9a of polished rod eye 9, in the middle of body 9a, be provided with the groove 9c that places regulating block 9b, regulating block 9b is hemispherical, its spherical is placed in groove 9c, and can in groove 9c, slide, in the middle of regulating block 9b, be provided with the perforation 9d for sucker rod 10 is installed, body 9a is also provided with and is useful on the perforation 9f that sucker rod 10 is installed on corresponding position, and sucker rod 10 is arranged on perforation 9d and 9f by a clip 9e.By the position of centre of gravity of design regulating block 9b, the direction of the 9d that guarantees to bore a hole is always vertical direction, that is to say the direction of gravity.Because the length of two heavy burden steel cables 7 can not be just the same, in fixing heavy burden steel cable 7, also may make the physical length deviation to some extent of two heavy burden steel cables 7, and the direction of perforation 9d is always vertical direction, can avoid two heavy burden steel cables, 7 length to cause sucker rod 10 crooked when inconsistent, affect the operating efficiency of oil pumper.
Consider that common braiding steel cable can produce local torsion along its weaving direction under the effect of pulling force, while being applied to bear a heavy burden steel cable 7 and balance steel cable 8, can make the torsional direction rotation along with steel cable of polished rod eye 9 and balance ballast box 11, the transmission of power is stable not, in the present embodiment, heavy burden steel cable 7 and balance steel cable 8 have adopted multilayer strand not rotate steel cable, the weaving direction of this steel cable ectonexine thigh is contrary, twisting resistance when tension on ectonexine thigh is cancelled out each other, guarantee that steel cable can not produce torsion now in the time of tension, power transmission is more stable, raise with respect to existing turning the flat steel cable that device is conventional simultaneously, more difficult wearing and tearing or cracking.
As shown in Figure 1, in the present embodiment, frame 1 lower end is also provided with buffer 12 and pedestal 14, and buffer 12 can be rubber or spring.Frame 1 is also provided with the chute 13 sliding for counterweight case 11 between the working platform 2 of upper end and the buffer 12 of lower end, is provided with the pulley 11a coordinating with chute 13 on counterweight case 11.
One end of pedestal 14 is hinged on the lower end of frame 1, the other end and support bar 15 are hinged, support bar 15 can be the detachable rod member of expansion link, folding rod or other two-parts, after launching, pedestal 14 keeps flat on the ground, with frame 1 and support bar 15 triangularities, frame 1 is formed to stable support.In the present embodiment, the detachable rod member that support bar 15 is two-part, comprise two stock 15a and the joint 15b being connected with two stock 15a spirals respectively, when normal use, two stock 15a connect into a straight-bar by joint 15b, need to dismantle time, joint 15b is removed from two stock 15a, can be by support bar 15, pedestal 14 together with frame 1 folding.
When the tower shelf type oil pumping machine of the present embodiment is worked, motor 3 carries out rotating clockwise or counterclockwise under the control of control system, decelerate to desired speed through reducer 4, then drive traction sheave 6 to carry out the rotation identical with motor 3 rotation directions by shaft coupling 5, the heavy burden steel cable 7 being wound on traction sheave 6 is released gradually, polished rod eye 9 and sucker rod 10 move downward desired location under the double action of the pulling force of gravity and heavy burden steel cable 5, balance steel cable 8 is wound onto on traction sheave 6 gradually, counterweight case 11 up moves along the chute 13 in frame 1 under the pulling force of balance steel cable 8, need to sling sucker rod 10 time, motor 3 rotates toward rightabout under the control of control system, the balance steel cable 8 being wound on traction sheave 6 is released gradually, counterweight case 11 down moves along the chute 13 in frame 1, heavy burden steel cable 7 is wound onto on traction sheave 6 gradually, pull polished rod eye 9 and sucker rod 10 up to move, and so forth, realize the oil pumping action of oil pumper.
By reference to the accompanying drawings the present invention is done to detailed explanation above; but embodiments of the present invention are not limited in above-mentioned embodiment; those skilled in the art can make various distortion to the present invention according to prior art; as adopting asynchronous machine to replace servomotor in above-described embodiment etc., these all belong to protection scope of the present invention.
Claims (10)
1. a tower shelf type oil pumping machine, comprise frame, described frame upper end is provided with working platform, it is characterized in that, the motor being connected in turn is installed on described working platform, reducer and traction sheave, described motor after connection and the power transmission shaft of described reducer are coaxial with described traction sheave, on described traction sheave, be wound with heavy burden steel cable and balance steel cable, described heavy burden steel cable one end is fixed on described traction sheave, and be wound on described traction sheave by pre-fixing turn, the other end is connected with sucker rod by polished rod eye, described balance steel cable one end is fixed on described traction sheave, and be wound on described traction sheave by pre-fixing turn, the other end is fixedly connected with counterweight case, described heavy burden steel cable is contrary with the coiling direction of described balance steel cable on described traction sheave.
2. tower shelf type oil pumping machine as claimed in claim 1, is characterized in that, also comprises shaft coupling, between described reducer and described traction sheave, connects by shaft coupling, and the turning cylinder of described shaft coupling is coaxial with described traction sheave.
3. tower shelf type oil pumping machine as claimed in claim 1, is characterized in that, described frame lower end is provided with buffer, and described frame is also provided with the chute sliding for described counterweight case between described working platform and described buffer.
4. tower shelf type oil pumping machine as claimed in claim 3, is characterized in that, on described counterweight case, is provided with the pulley coordinating with described chute.
5. the tower shelf type oil pumping machine as described in arbitrary claim in claim 1-4, it is characterized in that, described heavy burden steel cable has two, be connected to the two ends of described polished rod eye, in the middle of described polished rod eye, be provided with regulating block, in the middle of described regulating block, be provided with the perforation for described sucker rod is installed, the direction of described perforation is always vertical direction.
6. the tower shelf type oil pumping machine as described in arbitrary claim in claim 1-4, is characterized in that, described counterweight case comprises the balancing weight of one or more standard weights.
7. the tower shelf type oil pumping machine as described in arbitrary claim in claim 1-4, is characterized in that, described heavy burden steel cable and described balance steel cable are that multilayer strand does not rotate steel cable, and described reducer is planetary reduction gear.
8. the tower shelf type oil pumping machine as described in arbitrary claim in claim 1-4, is characterized in that, also comprises pedestal and support bar, and described pedestal, described support bar and described frame are hinged between two, and are launched into triangle.
9. tower shelf type oil pumping machine as claimed in claim 8, is characterized in that, described support bar comprises two stocks and the joint being connected with two described stock spirals respectively.
10. the tower shelf type oil pumping machine as described in arbitrary claim in claim 1-4, is characterized in that, described frame upper end is also provided with guardrail, goes along with sb. to guard him residence and state working platform when described guardrail is vertically placed, and when horizontal positioned, flushes with described working platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410267778.9A CN104005738A (en) | 2014-06-16 | 2014-06-16 | Tower type oil pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410267778.9A CN104005738A (en) | 2014-06-16 | 2014-06-16 | Tower type oil pumping unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104005738A true CN104005738A (en) | 2014-08-27 |
Family
ID=51366612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410267778.9A Pending CN104005738A (en) | 2014-06-16 | 2014-06-16 | Tower type oil pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104005738A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747138A (en) * | 2015-03-27 | 2015-07-01 | 宋嗣新 | Single-vertical-column direct-drive type energy-saving pumping unit |
| CN110295875A (en) * | 2019-08-13 | 2019-10-01 | 北京富机达能电气产品股份有限公司 | A kind of novel balanced type pumping unit |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5309992A (en) * | 1991-07-03 | 1994-05-10 | Evi-Highland Pump Company, Inc. | Pulley-drive lifting system |
| CN1088293A (en) * | 1993-04-16 | 1994-06-22 | 白连平 | long-stroke equalizing beam-pumping unit |
| WO2002068788A2 (en) * | 2001-02-26 | 2002-09-06 | 'castles' Home Services Incorporated | Well pumping unit driven by linear motor |
| CN2903360Y (en) * | 2006-04-28 | 2007-05-23 | 刘文举 | Balance type rotary drum oil pumping machine |
| CN201915864U (en) * | 2010-11-02 | 2011-08-03 | 中国石油化工股份有限公司 | Automatic adjustment beam hanger for oil extractor |
| CN102287169A (en) * | 2011-08-18 | 2011-12-21 | 濮阳市双发实业有限责任公司 | Rolling cylinder and tower frame type oil pumping unit |
| CN202810804U (en) * | 2012-10-22 | 2013-03-20 | 山东红帆能源科技有限公司 | Tower type pumping unit |
| CN103758490A (en) * | 2014-01-03 | 2014-04-30 | 浙江德清西传电气科技有限公司 | Vertical pumping unit with single reducer wheel |
| CN203925436U (en) * | 2014-06-16 | 2014-11-05 | 福建省意科电气科技有限公司 | A kind of tower shelf type oil pumping machine |
-
2014
- 2014-06-16 CN CN201410267778.9A patent/CN104005738A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5309992A (en) * | 1991-07-03 | 1994-05-10 | Evi-Highland Pump Company, Inc. | Pulley-drive lifting system |
| CN1088293A (en) * | 1993-04-16 | 1994-06-22 | 白连平 | long-stroke equalizing beam-pumping unit |
| WO2002068788A2 (en) * | 2001-02-26 | 2002-09-06 | 'castles' Home Services Incorporated | Well pumping unit driven by linear motor |
| CN2903360Y (en) * | 2006-04-28 | 2007-05-23 | 刘文举 | Balance type rotary drum oil pumping machine |
| CN201915864U (en) * | 2010-11-02 | 2011-08-03 | 中国石油化工股份有限公司 | Automatic adjustment beam hanger for oil extractor |
| CN102287169A (en) * | 2011-08-18 | 2011-12-21 | 濮阳市双发实业有限责任公司 | Rolling cylinder and tower frame type oil pumping unit |
| CN202810804U (en) * | 2012-10-22 | 2013-03-20 | 山东红帆能源科技有限公司 | Tower type pumping unit |
| CN103758490A (en) * | 2014-01-03 | 2014-04-30 | 浙江德清西传电气科技有限公司 | Vertical pumping unit with single reducer wheel |
| CN203925436U (en) * | 2014-06-16 | 2014-11-05 | 福建省意科电气科技有限公司 | A kind of tower shelf type oil pumping machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747138A (en) * | 2015-03-27 | 2015-07-01 | 宋嗣新 | Single-vertical-column direct-drive type energy-saving pumping unit |
| CN110295875A (en) * | 2019-08-13 | 2019-10-01 | 北京富机达能电气产品股份有限公司 | A kind of novel balanced type pumping unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203925436U (en) | A kind of tower shelf type oil pumping machine | |
| CN104941115B (en) | Training body-building machine for simulating load force | |
| CN101775969A (en) | Tower type combined drive pumping unit without guide wheel | |
| CN104016255A (en) | Double-direction turning and lifting device | |
| CN206804438U (en) | Realize moment of torsion and the pull-out test device for anchor cable of axle power decoupling | |
| CN109494621B (en) | Power transmission line blocking device | |
| CN204237493U (en) | A kind of substation equipment maintenance Simple hanger | |
| CN104005738A (en) | Tower type oil pumping unit | |
| CN101359816B (en) | Method suitable for tension stringing of ultra-high voltage wire | |
| CN108468289A (en) | A kind of stable type guardrail with draw-in and draw-off function for gradient road surface | |
| CN107720570A (en) | A kind of tower mast structure tower crane sustaining wall servicing unit | |
| CN203922545U (en) | A kind of two-way turning raised device | |
| CN104362542A (en) | Automatic wire feeding mechanism for tackle | |
| CN106438842B (en) | A kind of wirerope universal adjustment structure of casino facilities | |
| CN113488946A (en) | Expansion device for preventing wire from vibrating and operation method thereof | |
| CN208996484U (en) | It is a kind of to pitch servo-actuated wiring armed lever mechanism and crossing frame | |
| CN201953356U (en) | Oil pumping machine | |
| CN106329396A (en) | Damper installation tool | |
| CN108331447A (en) | A kind of easy-to-dismount guardrail for the protection of gradient pavement construction | |
| CN202673256U (en) | Cluster well one-machine double-production lifting device | |
| CN204607465U (en) | A kind of balance type two-way turns raises device | |
| CN202414917U (en) | Vertical elevator with spare safety rope | |
| CN108266124B (en) | A kind of horizontal drilling equipment with automatic addition drilling rod function | |
| CN201880234U (en) | Adjustable gear descent control device | |
| CN206375601U (en) | A kind of balanced type tower crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140827 |