CN102644452B - Tower chain belt oil pumping machine - Google Patents
Tower chain belt oil pumping machine Download PDFInfo
- Publication number
- CN102644452B CN102644452B CN201210147232.0A CN201210147232A CN102644452B CN 102644452 B CN102644452 B CN 102644452B CN 201210147232 A CN201210147232 A CN 201210147232A CN 102644452 B CN102644452 B CN 102644452B
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- CN
- China
- Prior art keywords
- chain
- roller
- pylon
- belt
- oil pumping
- 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 - Fee Related
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Abstract
The invention discloses a kind of tower chain belt oil pumping machine, comprise: pylon, its top is provided with the first leather belt roller and second leather belt roller of parallel interval, the pylon being positioned at the second leather belt roller side is provided with the equipment compartment of setting, and the pylon side of the first leather belt roller side is provided with the windproof guide rail vertically extended; Reciprocating load bearing belt, be crossed on the first leather belt roller and the second leather belt roller, the medial extremity comprising the equipment compartment being arranged in pylon and the outboard end extended outside pylon, wherein, outboard end is provided with for connecting with pumping rod polished rod eye, polished rod eye is provided with the guide wheel suitable with windproof guide rail, wherein, is provided with the first chain-drive mechanism and second chain-drive mechanism of tandem-driving bogie and the driven equilibrium case lifting moving be connected with load bearing belt medial extremity in equipment compartment.The present invention adopts four post tower structures, greatly can improve the stability of equipment, exempts wind and carries impact during oil pumping, increase the reliability of equipment.
Description
Technical field
The present invention relates to a kind of oil extraction in oil field oil pumper, particularly relate to a kind of tower chain belt oil pumping machine.
Background technology
Belt oil pumping machine is the ground oil production equipment of a kind of low jig frequency, long stroke, large load, can meet the oil well of various operating mode, have efficient, safe, reliable and energy-conservation feature, be all widely used at home and all over the world.
Belt oil pumping machine comprises base, the frame that base is erect, the load bearing belt be supported on the running roller of frame top, the tandem-driving bogie be connected with the medial extremity of load bearing belt, the polished rod eye be connected with load bearing belt outboard end, the chain-drive mechanism of driven equilibrium case and the motor of drive chain transmission mechanism and reducer.
Organize compared with chain-drive mechanism with single, it is equidirectional with load forces with joint efforts that two groups of chain-drive mechanisms have driving force, so have that operating noise is low, kinetic equation loss is little, load bearing belt is along the feature of belt width direction Load Balanced.But load belt is the flexible bearing member repeatedly moved, and easy wind-engaging carries impact.
Summary of the invention
The object of the present invention is to provide a kind of uniform force in the course of the work, operate steadily, wind can be exempted carry impact and the tower chain belt oil pumping machine in load belt application life can be improved.
For this reason, the invention provides a kind of tower chain belt oil pumping machine, comprise: pylon, its top is provided with the first leather belt roller and second leather belt roller of parallel interval, the pylon being positioned at the second leather belt roller side is provided with the equipment compartment of setting, and the pylon side of the first leather belt roller side is provided with the windproof guide rail vertically extended; Reciprocating load bearing belt, be crossed on the first leather belt roller and the second leather belt roller, the medial extremity comprising the equipment compartment being arranged in pylon and the outboard end extended outside pylon, wherein, outboard end is provided with the polished rod eye for connecting with pumping rod, polished rod eye is provided with the guide wheel suitable with windproof guide rail, wherein, is provided with the first chain-drive mechanism and second chain-drive mechanism of tandem-driving bogie and the driven equilibrium case lifting moving be connected with load bearing belt medial extremity in equipment compartment.
Further, above-mentioned tandem-driving bogie comprise be connected with the medial extremity of load bearing belt counterweight part, be positioned at driving slide below counterweight part, the restriction that arranges in the counterweight part left and right sides swings first lead that wheels and the restriction fore-and-aft direction that arranges in the counterweight part left and right sides swing second to lead wheels, wherein, the first coaster be connected movably with the chain syn-chro-step of the first chain-drive mechanism and the second coaster be connected movably with the chain syn-chro-step of the second chain-drive mechanism is provided with in driving slide.
Further, above-mentioned first guiding wheels are adjustable relative to the position of its guiding contact surface with each directive wheel in the second guiding wheels.
Further, above-mentioned counterweight part comprises multiple counterweight tank of the accommodation counterweight be set up in parallel, and each counterweight tank vertically extends.
Further, at least one side being positioned at load bearing belt both sides of above-mentioned pylon is provided with cat ladder.
Further, above-mentioned pylon is provided with multilayer inspection platform.
Further, above-mentioned pylon comprises base and the column of rectangular arrangement on base and be connected to the crossbeam arranged between column, and be provided with web arranged in a crossed manner between the column of the pylon side of the first leather belt roller side, windproof guide supporting is on crossbeam and web.
Further, above-mentioned first coaster and the second coaster comprise car body respectively, are supported on the driving shaft in the tapered bore of car body, the chain link being positioned at driving shaft side, the first group of roller being positioned at the arrangement of driving shaft upper horizontal and second group of roller, the 3rd group of roller being positioned at the arrangement of driving shaft lower horizontal and the 4th group of roller rotatably.
Further, the back shaft of above-mentioned first group of roller and the back shaft of second group of roller are position and rotate adjustable eccentric shaft, first group of roller and second group of roller and the guide rail abutting contact driven in slide.
Further, above-mentioned first chain-drive mechanism and the second chain-drive mechanism are driven by the same reductor on the base be arranged on outside equipment compartment simultaneously, reductor is connected with the motor-driven be arranged in motor platform, and wherein, motor platform also and between base has interval above base.
Compared with the single belt roller of prior art, the present invention, by arranging the first leather belt roller and the second leather belt roller, reduces the degree of crook in load bearing belt unit length, extends the application life of load bearing belt.Under the environment having wind, load bearing belt has certain front face area easily to swing, and sucker rod also can swing thereupon, and this is very disadvantageous for oil pumping facility.By arranging four post tower structures, windproof guide rail and guide wheel, wind can be exempted and carry impact during oil pumping, increasing the reliability of equipment.
Except object described above, feature and advantage, other object, feature and advantage that the present invention has, will be described in further detail by reference to the accompanying drawings.
Accompanying drawing explanation
Forming the part of this manual, showing the preferred embodiments of the present invention for understanding accompanying drawing of the present invention further, and be used for principle of the present invention is described together with manual.In figure:
Fig. 1 is the side schematic view according to tower chain belt oil pumping machine of the present invention;
Fig. 2 is the front schematic view according to tower chain belt oil pumping machine of the present invention;
Fig. 3 is the side schematic view according to tower chain belt oil pumping machine of the present invention, there is shown the chain-drive mechanism and tandem-driving bogie that are arranged in equipment compartment;
Fig. 4 is the side schematic view according to tower chain belt oil pumping machine of the present invention, there is shown tandem-driving bogie and is in extreme lower position and extreme higher position;
Fig. 5 is the schematic diagram of the kind of drive according to tower chain belt oil pumping machine of the present invention;
Fig. 6 is the front schematic view according to tandem-driving bogie of the present invention;
Fig. 7 is the side schematic view according to tandem-driving bogie of the present invention;
Fig. 8 is the annexation schematic diagram of coaster according to tandem-driving bogie of the present invention and described chain;
Fig. 9 is the front schematic view of the coaster according to tandem-driving bogie of the present invention;
Figure 10 is the schematic top plan view of the coaster according to tandem-driving bogie of the present invention;
Figure 11 is the floor map according to load bearing belt of the present invention;
Figure 12 is the structural representation according to load bearing belt of the present invention; And
Figure 13 is the structural representation according to brake system of the present invention.
Description of reference numerals
10 pylon 11 bases
12 column 13 crossbeams
14 first leather belt roller 15 second leather belt rollers
The windproof guide rail of 16 equipment compartment 17
18 motor platform 20 load bearing belts
21 medial extremity 22 outboard ends
23 guide wheel 24 hinged-supports
25 bolt 26 polished rod eyes
30 tandem-driving bogie 40 first chain-drive mechanisms
40 ' second chain-drive mechanism
50 reductor 60 motors
70 brake system 71 brake discs
72 first brake pincers 73 second braking clamps
74 manual adjustment rod 75 are adjusting rod automatically
101 inspection platform 102 cat ladders
103 web 41 lower sprockets
42 upper sprocket wheel 43 ring chains
44 supporting seat 31 counterweight parts
32 drive slide 33 first guiding wheels
The 34 second sliding chambeies of guiding wheels 321
35 first coaster 36 second coasters
311 counterweight tank 37 position adjusting mechanisms
351 car body 352 tapered bore
353 driving shaft 354 chain links
355 first groups of rollers, 356 second groups of rollers
357 the 3rd groups of rollers 358 the 4th group of roller
351a elasticity holder 359 eccentric shaft
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Fig. 1 to Fig. 5 is the structural representation of belt oil pumping machine according to an embodiment of the invention.In conjunction with reference 1 and Fig. 5, tower chain belt oil pumping machine of the present invention comprises: pylon 10, the column 12 comprising base 11 and rectangular arrangement on the pedestal 11 and the crossbeam 13 be connected between column 12, the top of pylon 10 is provided with the first leather belt roller 14 and the second leather belt roller 15 of parallel interval, the pylon side that the pylon 10 being positioned at the second leather belt roller 15 side is provided with equipment compartment 16, first leather belt roller 14 side of setting is provided with the windproof guide rail 17 vertically extended; Load bearing belt 20, be crossed on the first leather belt roller 14 and the second leather belt roller 15, the medial extremity 21 comprising the equipment compartment 16 being arranged in pylon 10 and the outboard end 22 extended outside pylon 10, wherein, outboard end 22 forms polished rod eye, which is provided with the guide wheel 23 suitable with windproof guide rail 17, wherein, be provided with in equipment compartment 16 and the tandem-driving bogie 30 that load bearing belt 20 medial extremity 21 connects and the first chain-drive mechanism 40 and the second chain-drive mechanism 40 ' driving parallel case 30 lifting moving.
Compared with the single belt roller of prior art, the present invention, by arranging the first leather belt roller and the second leather belt roller, reduces the degree of crook in unit length, extends the application life of belt.Under the environment having wind, load bearing belt has certain front face area easily to swing, and sucker rod also can swing thereupon, and this is very disadvantageous for oil pumping facility.By arranging windproof guide rail and guide wheel, wind can be exempted and carry impact during oil pumping, increasing the reliability of equipment.In existing belt oil pumping machine, frame only has equipment compartment, does not have other parts, can not form the pylon mentioned by the present invention, and operation and maintenance is all inconvenient, and in the present invention, the pylon structure of employing is reliable, be easy to working service.
Compared with the single chain driving of prior art, the present invention is stressed more reasonable, runs more steady, increases the application life of equipment and reduce noise.Adopt four-column type tower structure, significantly can improve stability and the reliability of equipment.
Tower chain belt oil pumping machine of the present invention is also included in the reductor 50 that the base 11 outside equipment compartment 16 is arranged and the motor 60 be in transmission connection with reductor 50 in motor platform 18, wherein, motor platform 18 has a height apart from base 11, passes through V belt translation therebetween.
Tower chain belt oil pumping machine of the present invention also comprises brake system 70, as shown in figure 13, this brake system 70 comprises brake disc 71, the first brake pincers 72 arranged in brake disc 71 periphery and the second braking clamp 73, first brake pincers 72 are operated by manual adjustment rod 74, to realize hand-operated brake function, second braking clamp 73 is operated by automatic adjusting rod 75, overruns to meet reductor and owes the self-stopping occasions of needs such as speed.
Wherein, pylon 10 is provided with multilayer inspection platform 101, and at least one side being positioned at load bearing belt both sides of pylon is provided with cat ladder 102.
Wherein, be provided with web 103 arranged in a crossed manner between the column of the pylon side of the first leather belt roller 14 side, windproof guide rail 17 is supported on crossbeam 13 and web 103.
Wherein, the first chain-drive mechanism 40 comprises lower sprocket 41, upper sprocket wheel 42 and ring chain 43, and upper sprocket wheel 42 is supported on sprocket wheel supporting seat 44.It is pointed out that the upper sprocket wheel of the first chain-drive mechanism and the position of lower sprocket are motionless, only have chain annular to rotate.Preferably, between each lower sprocket 41 and the output shaft of reductor 50, adopt rotatable swelling device to connect, realize the first chain-drive mechanism 40 and the synchronous installation requirement of the first chain-drive mechanism 40 '.
Fig. 6 and Fig. 7 is the structural representation according to tandem-driving bogie of the present invention.As shown in Figure 6 and Figure 7, tandem-driving bogie 30 comprise be connected with the medial extremity of load bearing belt 20 counterweight part 31, be positioned at driving slide 32 below counterweight part 31, the restriction that arranges in counterweight part 31 left and right sides swings first lead that wheels 33 and the restriction fore-and-aft direction that arranges in counterweight part 31 left and right sides swing second to lead wheels 34, wherein, drive slide 32 sliding chamber 321 in be provided with the first coaster 35 be connected movably with the chain syn-chro-step of the first chain-drive mechanism 40 and the second coaster 36 be connected movably with the chain syn-chro-step of the second chain-drive mechanism 40 '.
Wherein, the directive wheel that the first guiding wheels 33 are included in upper left, lower-left, upper right, this four positions, bottom right are arranged respectively.The directive wheel that second guiding wheels 34 comprise upper left, lower-left, upper right, this four positions, bottom right are arranged respectively, wherein, the directive wheel on each position of the second guiding wheels 34 has two, arranges along front and back, and a restriction forward rocking motion, a restriction swings backward.
Preferably, the first guiding wheels 33 are adjustable relative to the position of its guiding contact surface with each directive wheel in the second guiding wheels 34.Concrete mode can be as follows: directive wheel is arranged in swing arm, by the position regulating the pivot angle of swing arm to regulate directive wheel.
Preferably, counterweight part 31 comprises the multiple counterweight tank 311 for holding balance weight body be set up in parallel, and each counterweight tank 311 vertically extends.The height of counterweight part 31 is 3 ~ 5 times that drive slide 32 height.The bottom of equipment compartment 16 is provided with the position adjusting mechanism 37 of tandem-driving bogie 30.
Again as shown in Figure 5 and Figure 8, first chain-drive mechanism 40 and the second chain-drive mechanism 40 ' are also arranged in equipment compartment, be positioned at the front side of counterweight part 31, by same reductor Synchronous Transmission, the first chain-drive mechanism 40 is identical with speed with the chain drive of the second chain-drive mechanism 40 '.
Fig. 9 and Figure 10 is the structural representation of the coaster according to tandem-driving bogie of the present invention.As shown in Figure 9 and Figure 10, coaster 35(coaster 36 structure is with coaster 35) comprise car body 351, the driving shaft 353 be supported on rotatably in the tapered bore 352 of car body 351, the chain link 354 being positioned at driving shaft 353 side, the first group of roller 355 being positioned at the arrangement of car body 351 upper level and second group of roller 356, the 3rd group of roller 357 being positioned at the arrangement of car body 351 lower horizontal and the 4th group of roller 358.
In use, the slide rail contact in the sliding chamber 321 of first group of roller, 355, second group of roller 356, the 3rd group of roller 357, the 4th group of roller 358 difference chamber seat 32, the first coaster like this and the second coaster only move in the horizontal direction.
The back shaft 359 of first group of roller 355 is the adjustable eccentric shaft in position.Back shaft 359 is fixedly clamped by the elasticity holder 351a on car body 351, when debugging, unclamps the bolt on elasticity holder 351a, eccentric rotation axis 359, can make first group of roller 355 and the guide rail abutting contact in sliding chamber 321, realize tensioning function.The structure of the back shaft of second group of roller 356 is identical with the back shaft of first group of roller 355, has the function making roller from tensioning guide rail.
Figure 11 and Figure 12 is the structural representation according to load bearing belt of the present invention.As is illustrated by figs. 11 and 12, the medial extremity 21 of load bearing belt 20 is fixedly connected with by multiple bolt 25 with hinged-support 24, the end of each bolt 25 is tapered, in order to avoid make belt fibres rupture and reduce its bonding strength when hammering into belt, the outboard end 22 of load bearing belt 20 is fixedly connected with by multiple bolt with polished rod eye 26, the inner side of polished rod eye 26 forms guide wheel 23, and the end of each bolt is also tapered, in order to avoid make belt fibres rupture and reduce its intensity.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a tower chain belt oil pumping machine, is characterized in that, comprising:
Pylon (10), its top is provided with the first leather belt roller (14) and second leather belt roller (15) of parallel interval, the pylon (10) being positioned at described second leather belt roller (15) side is provided with the equipment compartment (16) of setting, and pylon (10) side of described first leather belt roller (14) side is provided with the windproof guide rail (17) vertically extended;
Reciprocating load bearing belt (20), be crossed on described first leather belt roller (14) and the second leather belt roller (15), the medial extremity (21) comprising the equipment compartment (16) being arranged in described pylon (10) and the outboard end (22) extended in described pylon (10) outside, wherein, described outboard end (22) is provided with the polished rod eye (26) for connecting with pumping rod, described polished rod eye (26) is provided with the guide wheel (23) suitable with described windproof guide rail (17)
Wherein, the tandem-driving bogie (30) be connected with described load bearing belt (20) medial extremity and the first chain-drive mechanism (40) driving described tandem-driving bogie (30) lifting moving and the second chain-drive mechanism (40 ') is provided with in described equipment compartment (16);
Described first chain-drive mechanism (40) and the second chain-drive mechanism (40 ') drive with the same reductor (50) be arranged on described equipment compartment (16) base outward (11) simultaneously and are connected, described reductor (50) and the motor (60) be arranged in motor platform (18) are in transmission connection, wherein, described motor platform (18) be positioned at described base (11) top and and between described base (11), there is interval;
Described tandem-driving bogie (30) comprises the counterweight part (31) be connected with the medial extremity of described load bearing belt (20) (21), be positioned at the driving slide (32) of described counterweight part (31) below, the first guiding wheels (33) that the restriction arranged in described counterweight part (31) left and right sides swings, and in the second guiding wheels (34) that the restriction fore-and-aft direction of described counterweight part (31) left and right sides setting swings, wherein, the first coaster (35) be connected movably with the chain syn-chro-step of described first chain-drive mechanism (40) and the second coaster (36) be connected movably with the chain syn-chro-step of described second chain-drive mechanism (40 ') is provided with in described driving slide (32).
2. tower chain belt oil pumping machine according to claim 1, is characterized in that, described first guiding wheels (33) is adjustable relative to the position of its guiding contact surface with each directive wheel in the second guiding wheels (34).
3. tower chain belt oil pumping machine according to claim 1, it is characterized in that, described counterweight part (31) comprises multiple counterweight tank (311) of the accommodation counterweight be set up in parallel, and each described counterweight tank (311) vertically extends.
4. tower chain belt oil pumping machine according to claim 1, is characterized in that, at least one side being positioned at described load bearing belt (20) both sides of described pylon (10) is provided with cat ladder (102).
5. tower chain belt oil pumping machine according to claim 1, is characterized in that, described pylon (10) is provided with multilayer inspection platform (101).
6. tower chain belt oil pumping machine according to claim 1, it is characterized in that, described pylon (10) comprises the column (12) of base (11) and rectangular arrangement on described base (11) and is connected to the crossbeam (13) arranged between described column (12), be provided with web (103) arranged in a crossed manner between the column (12) of pylon (10) side of described first leather belt roller (14) side, described windproof guide rail (17) is supported on described crossbeam (13) and web (103).
7. tower chain belt oil pumping machine according to claim 1, it is characterized in that, described first coaster (35) and the second coaster (36) comprise car body (351) respectively, be supported on the driving shaft (353) in the tapered bore (352) of described car body (351) rotatably, be positioned at the chain link (354) of described driving shaft (353) side, be positioned at first group of horizontal roller (355) and second group of roller (356) of described driving shaft (353) top, be positioned at the 3rd group of horizontal roller (357) and the 4th group of roller (358) of described driving shaft (353) below.
8. tower chain belt oil pumping machine according to claim 7, it is characterized in that, the back shaft of described first group of roller (355) and the back shaft of second group of roller (356) are position and rotate adjustable eccentric shaft (359), described first group of roller (355) and second group of roller (356) and the guide rail abutting contact in described driving slide (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210147232.0A CN102644452B (en) | 2012-05-11 | 2012-05-11 | Tower chain belt oil pumping machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210147232.0A CN102644452B (en) | 2012-05-11 | 2012-05-11 | Tower chain belt oil pumping machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102644452A CN102644452A (en) | 2012-08-22 |
| CN102644452B true CN102644452B (en) | 2015-10-21 |
Family
ID=46657508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210147232.0A Expired - Fee Related CN102644452B (en) | 2012-05-11 | 2012-05-11 | Tower chain belt oil pumping machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102644452B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677744A (en) * | 2015-11-09 | 2017-05-17 | 宁夏琪凯节能设备有限公司 | Energy-saving tower type double-chain belt oil pumping unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2179918Y (en) * | 1993-05-05 | 1994-10-19 | 赵杰 | Energy-saving counterweight balanced chain beam-pumping unit |
| CN2254491Y (en) * | 1996-03-12 | 1997-05-21 | 陈宗哲 | Planetary exhauster for removing cooking fumes |
| US6336622B1 (en) * | 1997-04-24 | 2002-01-08 | Engineering & Drilling Machinery As | Tower |
| CN2600586Y (en) * | 2002-10-10 | 2004-01-21 | 王钢 | High-efficient low-consumption intelligent beam-pumping unit driven by low-speed large-torque abnormal-shape electric motor |
| CN200955382Y (en) * | 2006-10-10 | 2007-10-03 | 李延林 | Balance-weight-body track apparatus for pumping unit and pumping unit |
| CN101539001A (en) * | 2009-04-17 | 2009-09-23 | 胜利油田山友石油技术有限公司 | Inclined type long annular rack oil pumping machine |
| CN202560177U (en) * | 2012-05-11 | 2012-11-28 | 温州华斯特环保设备有限公司 | Tower-type double-chain belt pumping unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050045428A1 (en) * | 2003-09-02 | 2005-03-03 | Jean-Marie Rennetaud | Elevator with a scissor lift assembly and a central drive mechanism |
-
2012
- 2012-05-11 CN CN201210147232.0A patent/CN102644452B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2179918Y (en) * | 1993-05-05 | 1994-10-19 | 赵杰 | Energy-saving counterweight balanced chain beam-pumping unit |
| CN2254491Y (en) * | 1996-03-12 | 1997-05-21 | 陈宗哲 | Planetary exhauster for removing cooking fumes |
| US6336622B1 (en) * | 1997-04-24 | 2002-01-08 | Engineering & Drilling Machinery As | Tower |
| CN2600586Y (en) * | 2002-10-10 | 2004-01-21 | 王钢 | High-efficient low-consumption intelligent beam-pumping unit driven by low-speed large-torque abnormal-shape electric motor |
| CN200955382Y (en) * | 2006-10-10 | 2007-10-03 | 李延林 | Balance-weight-body track apparatus for pumping unit and pumping unit |
| CN101539001A (en) * | 2009-04-17 | 2009-09-23 | 胜利油田山友石油技术有限公司 | Inclined type long annular rack oil pumping machine |
| CN202560177U (en) * | 2012-05-11 | 2012-11-28 | 温州华斯特环保设备有限公司 | Tower-type double-chain belt pumping unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102644452A (en) | 2012-08-22 |
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Granted publication date: 20151021 Termination date: 20190511 |