CN108097493B - A kind of efficient sea oil drilling and production atomising device - Google Patents

A kind of efficient sea oil drilling and production atomising device Download PDF

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Publication number
CN108097493B
CN108097493B CN201711351910.4A CN201711351910A CN108097493B CN 108097493 B CN108097493 B CN 108097493B CN 201711351910 A CN201711351910 A CN 201711351910A CN 108097493 B CN108097493 B CN 108097493B
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CN
China
Prior art keywords
fixedly connected
water inlet
inlet line
oil drilling
atomising device
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Expired - Fee Related
Application number
CN201711351910.4A
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Chinese (zh)
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CN108097493A (en
Inventor
盛江
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Shandong Ruilier Petroleum Equipment Co ltd
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Shandong Ruilier Petroleum Equipment Co Ltd
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Priority to CN201711351910.4A priority Critical patent/CN108097493B/en
Publication of CN108097493A publication Critical patent/CN108097493A/en
Application granted granted Critical
Publication of CN108097493B publication Critical patent/CN108097493B/en
Expired - Fee Related legal-status Critical Current
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/047Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump supply being effected by follower in container, e.g. membrane or floating piston, or by deformation of container

Abstract

The present invention relates to oil drilling and extracting equipment technical fields, and disclose a kind of efficient sea oil drilling and production atomising device, including water inlet line, the left end of the water inlet line is fixedly connected with water source, symmetrical two first connecting rods are fixedly connected on inner surface at the top and bottom of the water inlet line, two first connecting rod one end close to each other are fixedly connected by headstock.The efficient sea oil drilling and production atomising device, by setting stepper motor, threaded rod, limit plate, draw bar and piston is pushed to play the role of carrying out pushing pressurized treatments to water, and then it ensure that the water under low-pressure state enters after water inlet line and also can be carried out Self-pressurizing agri effect to be processed, it ensure that ignoring pressure just can be carried out subsequent atomization work, the limitation of hydraulic pressure before being atomized is prevented, more have the function that unidirectional water inflow is atomized by the way that bellmouth is arranged, to reach convenient for more quickly finishing normal atomization work.

Description

A kind of efficient sea oil drilling and production atomising device
Technical field
The present invention relates to oil drilling and extracting equipment technical field, specially a kind of efficient sea oil drilling and production atomising device.
Background technique
One of main object of petroleum geology exploration is a kind of sticky and dark brown liquid, referred to as " industrial blood There are petroleum storage in liquid ", upper crustal some areas, and main component is the mixture of various alkane, cycloalkane and aromatic hydrocarbon, petroleum There is biogenic deposit to become oil and the oily two kinds of theories of petrochemical industry at oil machine reason, the former more widely receives, it is believed that petroleum be ancient times ocean or Biology in lake is formed by very long evolution, is belonged to biogenic deposit and is become oil, non-renewable, the latter thinks that petroleum is by the earth's crust Interior carbon itself generates, and unrelated with biology, renewable, petroleum is mainly used as fuel oil and gasoline and many chemical works Industry product, such as solution, chemical fertilizer, insecticide and plastics raw material, ancient Egypt and Chaldaic are exploiting benefit a long time ago With petroleum, " petroleum " this Chinese is to be included to name for the first time by Northern Song Dynasty big science man Shen.
And existing petroleum drilling and mining atomising device all has the higher effect for requiring to can be only achieved atomization to hydraulic pressure, limitation Property larger, the effective use of normal drilling atomising device in the lower area of strong influence air pressure, it is therefore desirable to Yi Zhongwu The petroleum drilling and mining atomizer that high-efficient atomizing is carried out depending on hydraulic pressure, as disclosed a kind of mist in 104271251 B of Chinese patent CN Change device, water source be atomized wherein achieving the effect that not need excessively high hydraulic pressure to reach by injection apparatus and hole for water spraying, But still have certain requirement for hydraulic pressure, so there is also certain limitation, when in the biggish situation of extraneous wind speed The quality and efficiency of strong influence atomization, so be not easy to very much carry out atomization work under low pressure and the biggish situation of wind speed Make, so most important for a kind of efficient sea oil drilling and production atomising device.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of efficient sea oil drilling and production atomising device, has nothing The advantages that depending on hydraulic pressure and extraneous factor high-efficient atomizing, solves the problems, such as that inconvenience is atomized when the lower and extraneous wind speed of hydraulic pressure is larger.
(2) technical solution
To realize the above-mentioned purpose for ignoring hydraulic pressure and extraneous factor high-efficient atomizing, the invention provides the following technical scheme: one The efficient sea oil drilling and production atomising device of kind, including water inlet line, the left end of the water inlet line are fixedly connected with water source, institute It states and is fixedly connected with symmetrical two first connecting rods, two first connecting rod phases on the inner surface at the top and bottom of water inlet line Mutually close one end is fixedly connected by headstock, and stepper motor is fixedly connected on the inner wall on the left of the headstock, described Be fixedly connected on inner wall on the left of headstock positioned at stepper motor two sides and symmetrical two gag lever posts, the gag lever post it is separate One end of headstock inner left wall is fixedly connected by bar, and the output end on the right side of the stepper motor is fixedly connected with screw thread Bar, the threaded rod are connected with loop bar, the one end of the loop bar far from threaded rod far from the threaded one end of stepper motor output end It is fixedly connected with limit plate, the outer surface of gag lever post is socketed at the top and bottom of the limit plate, the limit plate is far from set The side of bar is fixedly connected with draw bar, and the one end of the draw bar far from limit plate is fixedly connected with promotion through headstock and lives Plug, described to push the bellmouth offered on the right side of connection promotion piston on the left of piston, the internal diameter of the bellmouth is from left-hand The right side is gradually reduced, and the right side opening of the water inlet line is equipped with the through-hole of inner wall on the right side of connection water inlet line, the water inlet line Right side is fixedly connected with the effect block on the outside of through-hole, the position that the left side of the effect block correspond to through-hole offer it is multiple out Water hole is fixedly connected with symmetrical two the second connecting rods, two second companies on the inner surface at the top and bottom of the apopore Extension bar one end close to each other is fixedly connected by synchronous motor, and the output end on the right side of the synchronous motor is fixedly connected with rotation Bar, the outer surface of the rotating bar are fixedly connected with helical flight, and the outer surface of the helical flight offers multiple first mists Change hole, asynchronous machine is fixedly connected on the right side of the effect block, the output end of the asynchronous machine bottom, which is fixedly connected with, to be turned Axis, the shaft are fixedly connected with atomization net far from one end of asynchronous machine output end, and the outer surface of the atomization net offers Multiple second orifices, the atomization net are fixedly connected with locating rod far from one end of shaft, and the right side of the effect block is fixed It is connected with the bearing block being located at immediately below locating rod, the locating rod is fixedly connected at the top of bearing block far from one end of atomization net Inner surface on, it is described effect block on the right side of be fixedly connected on the outside of asynchronous machine and bearing block go out mist net.
Preferably, the outer surface of the gag lever post is fixedly connected with sliding-aided mat, and the outer surface of the draw bar is fixedly connected There is wear-resistant pad.
Preferably, the diameter of the threaded rod is three centimetres, and the length of the threaded rod is 25 centimetres, the screw thread The shape of bar right side is circle.
Preferably, the top and bottom for pushing piston are bonded with the inner surface of water inlet line, the promotion piston With a thickness of three centimetres.
Preferably, the through-hole with a thickness of two centimetres, the diameter of the through-hole is 25 centimetres.
Preferably, the quantity of the bellmouth is eight, and eight bellmouth circular arrays.
Preferably, the diameter of first orifice is three millimeters, and the diameter of second orifice is 3/2nds millis The quantity of rice, first orifice and the second orifice is no less than 100.
Preferably, the connection type between the headstock and threaded rod and stepper motor be welding, the bearing block with The connection type between mist net and effect block is also welding out.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of efficient sea oil drilling and production atomising device, having following has Beneficial effect:
1, efficient sea oil drilling and production atomising device, by the way that stepper motor, threaded rod, limit plate, draw bar is arranged With promotion piston play the role of that water is carried out to push pressurized treatments, and then ensure that the water under low-pressure state enters water inlet line It also can be carried out Self-pressurizing agri effect to be processed afterwards, ensure that ignoring pressure just can be carried out subsequent atomization work, prevent mist The limitation of hydraulic pressure before changing more has the function that unidirectional water inflow is atomized by the way that bellmouth is arranged, to reach convenient for more quickly Completion be normally atomized work.
2, efficient sea oil drilling and production atomising device, by the way that synchronous motor, rotating bar, helical flight and first is arranged Orifice plays the role of carrying out water source initial atomization processing, then passes through setting asynchronous machine, shaft, atomization net and the second mist Change hole, which is played, carries out atomization process again to the water source after initial atomization, and then ensure that the effect being integrally atomized, to reach Ignore the effect of extraneous factor high-efficient atomizing.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is the schematic diagram of internal structure of water inlet line of the present invention;
Fig. 3 is the schematic diagram of internal structure of headstock of the present invention;
Fig. 4 is that the present invention pushes piston left view structural representation;
Fig. 5 is the schematic diagram of internal structure of present invention effect block;
Fig. 6 is present invention effect block left view structural representation;
Fig. 7 is the structural schematic diagram of helical flight of the present invention.
In figure: 1 water inlet line, 2 first connecting rods, 3 headstocks, 4 stepper motors, 5 gag lever posts, 6 bars, 7 threaded rods, 8 Loop bar, 9 limit plates, 10 draw bars, 11 push piston, 12 bellmouths, 13 through-holes, 14 effect blocks, 15 apopores, 16 second connections Bar, 17 synchronous motors, 18 rotating bars, 19 helical flights, 20 first orifices, 21 asynchronous machines, 22 shafts, 23 atomization nets, 24 Second orifice, 25 locating rods, 26 bearing blocks, 27 go out mist net.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Fig. 1-7, a kind of efficient sea oil drilling and production atomising device, including water inlet line 1 are please referred to, water inlet line 1 Left end is fixedly connected with water source, and symmetrical two first connections are fixedly connected on the inner surface of 1 top and bottom of water inlet line Bar 2, two first connecting rods 2 one end close to each other are fixedly connected by headstock 3, fixed on the inner wall in 3 left side of headstock It is connected with stepper motor 4, is fixedly connected on the inner wall in 3 left side of headstock positioned at 4 two sides of stepper motor and symmetrical two limits Position bar 5, the one end of gag lever post 5 far from 3 inner left wall of headstock are fixedly connected by bar 6, the output end on 4 right side of stepper motor It is fixedly connected with threaded rod 7, the diameter of threaded rod 7 is three centimetres, and the length of threaded rod 7 is 25 centimetres, 7 right side of threaded rod The shape in face is circle, and threaded rod 7 is connected with loop bar 8 far from the threaded one end of 4 output end of stepper motor, and loop bar 8 is far from screw thread One end of bar 7 is fixedly connected with limit plate 9, and the top and bottom of limit plate 9 are socketed in the outer surface of gag lever post 5, and limit plate 9 is remote Side from loop bar 8 is fixedly connected with draw bar 10, and the outer surface of gag lever post 5 is fixedly connected with sliding-aided mat, draw bar 10 it is outer Surface is fixedly connected with wear-resistant pad, and the one end of draw bar 10 far from limit plate 9 is fixedly connected with promotion piston through headstock 3 11, push piston 11 top and bottom be bonded with the inner surface of water inlet line 1, promotion piston 11 with a thickness of three centimetres, push away The left side of piston 11 offers the bellmouth 12 that connection pushes the right side of piston 11, and the internal diameter of bellmouth 12 is from left to right gradually Reduce, the quantity of bellmouth 12 is eight, and eight 12 circular arrays of bellmouth, by setting stepper motor 4, threaded rod 7, Limit plate 9, draw bar 10 and promotion piston 11 play the role of carrying out pushing pressurized treatments to water, and then ensure that low-pressure state Under water enter after water inlet line 1 and also can be carried out Self-pressurizing agri effect to be processed, ensure that ignore pressure just and can be carried out it is subsequent Atomization work, prevented be atomized before hydraulic pressure limitation, more by be arranged bellmouth 12 have the function that unidirectional water inflow be atomized, To reach convenient for more quickly finishing normal atomization work, it is right that the right side opening of water inlet line 1 is equipped with connection water inlet line 1 The through-hole 13 of side inner wall, through-hole 13 with a thickness of two centimetres, the diameter of through-hole 13 is 25 centimetres, the right side of water inlet line 1 Be fixedly connected with the effect block 14 for being located at the outside of through-hole 13, the position that the left side of effect block 14 correspond to through-hole 13 offer it is multiple out Water hole 15, is fixedly connected with symmetrical two the second connecting rods 16 on the inner surface of the top and bottom of apopore 15, and two second The one end close to each other of connecting rod 16 is fixedly connected by synchronous motor 17, and the output end on 17 right side of synchronous motor is fixedly connected with Rotating bar 18, the outer surface of rotating bar 18 are fixedly connected with helical flight 19, and the outer surface of helical flight 19 offers multiple The right side of one orifice 20, effect block 14 is fixedly connected with asynchronous machine 21, and the output end of 21 bottom of asynchronous machine is fixedly connected There is shaft 22, shaft 22 is fixedly connected with atomization net 23 far from one end of 21 output end of asynchronous machine, is atomized the outer surface of net 23 Offering multiple second orifices 24, the diameter of the first orifice 20 is three millimeters, the diameter of the second orifice 24 is two/ Three millimeters, the quantity of the first orifice 20 and the second orifice 24 is no less than 100, passes through setting synchronous motor 17, rotation Bar 18, helical flight 19 and the first orifice 20 play the role of carrying out water source initial atomization processing, then asynchronous by being arranged Motor 21, shaft 22, atomization net 23 and the second orifice 24, which are played, carries out atomization process again to the water source after initial atomization, into And ensure that the effect being integrally atomized, to achieve the effect that ignore extraneous factor high-efficient atomizing, net 23 is atomized far from shaft 22 One end be fixedly connected with locating rod 25, the right side of effect block 14 is fixedly connected with the bearing block immediately below locating rod 25 26, locating rod 25 is fixedly connected on the inner surface at 26 top of bearing block far from one end of atomization net 23, acts on the right side of block 14 It is fixedly connected with and goes out mist net 27, headstock 3 and threaded rod 7 and stepper motor 4 positioned at 26 outside of asynchronous machine 21 and bearing block Between connection type be welding, bearing block 26 and out mist net 27 and effect block 14 between connection type be also welding.
When in use, water source enters the position for pushing 11 right side of piston by bellmouth 12, and stepper motor 4 controls threaded rod 7 rotations make the control of draw bar 10 push 11 forward-reverse of piston, achieve the purpose that carry out pressurized treatments to water source, water source passes through again First orifice 20 on 19 surface of helical flight carries out initial atomization processing, then is rotated by the control atomization net 23 of asynchronous machine 21 It is atomized the water source of initial atomization thoroughly, to achieve the effect that ignoring hydraulic pressure and external environment is thoroughly atomized.
In conclusion the efficient sea oil drilling and production atomising device, passes through setting stepper motor 4, threaded rod 7, limit Plate 9, draw bar 10 and promotion piston 11 play the role of carrying out pushing pressurized treatments to water, and then ensure that under low-pressure state Water, which enters after water inlet line 1, also can be carried out Self-pressurizing agri effect to be processed, ensure that ignoring pressure just can be carried out subsequent mist Chemical industry is made, and the limitation of hydraulic pressure before being atomized has been prevented, and more has the function that unidirectional water inflow is atomized by the way that bellmouth 12 is arranged, thus Reach convenient for more quickly finishing normal atomization work.
Also, by setting synchronous motor 17, rotating bar 18, helical flight 19 and the first orifice 20 play to water source into The effect of row initial atomization processing, then played pair by setting asynchronous machine 21, shaft 22, atomization net 23 and the second orifice 24 Water source after initial atomization carries out atomization process again, and then ensure that the effect being integrally atomized, thus reach ignore it is extraneous because The effect of plain high-efficient atomizing.
It should be noted that the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device. In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element Process, method, article or equipment in there is also other identical elements.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (8)

1. a kind of efficient sea oil drilling and production atomising device, including water inlet line (1), it is characterised in that: the water inlet line (1) left end is fixedly connected with water source, is fixedly connected with symmetrical two on the inner surface at the top and bottom of the water inlet line (1) A first connecting rod (2), two first connecting rods (2) one end close to each other are fixedly connected by headstock (3), the power It is fixedly connected on inner wall on the left of case (3) stepper motor (4), is fixedly connected with position on the inner wall on the left of the headstock (3) In stepper motor (4) two sides and symmetrical two gag lever posts (5), the gag lever post (5) far from headstock (3) inner left wall one End is fixedly connected by bar (6), and the output end on the right side of the stepper motor (4) is fixedly connected with threaded rod (7), the screw thread Bar (7) is connected with loop bar (8) far from the threaded one end of stepper motor (4) output end, and the loop bar (8) is far from threaded rod (7) One end is fixedly connected with limit plate (9), and the outer surface of gag lever post (5) is socketed at the top and bottom of the limit plate (9), described Limit plate (9) is fixedly connected with draw bar (10) far from the side of loop bar (8), and the draw bar (10) is far from limit plate (9) One end is fixedly connected with through headstock (3) and pushes piston (11), and connection is offered on the left of the promotion piston (11) and is pushed The internal diameter of bellmouth (12) on the right side of piston (11), the bellmouth (12) is to be gradually reduced from left to right, the water inlet line (1) right side opening is equipped with the through-hole (13) of inner wall on the right side of connection water inlet line (1), and the right side of the water inlet line (1) is fixed to be connected It is connected to the effect block (14) being located on the outside of through-hole (13), the position that the left side of effect block (14) corresponds to through-hole (13) offers Multiple apopores (15) are fixedly connected with symmetrical two second connections on the inner surface at the top and bottom of the apopore (15) Bar (16), two the second connecting rods (16) one end close to each other are fixedly connected by synchronous motor (17), the synchronous motor (17) output end on the right side of is fixedly connected with rotating bar (18), and the outer surface of the rotating bar (18) is fixedly connected with helical flight (19), the outer surface of the helical flight (19) offers multiple first orifices (20), and the right side of effect block (14) is solid Surely it is connected with asynchronous machine (21), the output end of asynchronous machine (21) bottom is fixedly connected with shaft (22), the shaft (22) one end far from asynchronous machine (21) output end is fixedly connected with atomization net (24), and the outer surface of atomization net (24) is opened Equipped with multiple second orifices (24), atomization net (24) is fixedly connected with locating rod (25) far from the one end of shaft (22), The bearing block (26) being fixedly connected on the right side of effect block (14) immediately below locating rod (25), the locating rod (25) One end far from atomization net (24) is fixedly connected on the inner surface at the top of bearing block (26), and the right side of effect block (14) is solid Surely it is connected with and goes out mist net (27) on the outside of asynchronous machine (21) and bearing block (26).
2. a kind of efficient sea oil drilling and production atomising device according to claim 1, it is characterised in that: the gag lever post (5) outer surface is fixedly connected with sliding-aided mat, and the outer surface of the draw bar (10) is fixedly connected with wear-resistant pad.
3. a kind of efficient sea oil drilling and production atomising device according to claim 1, it is characterised in that: the threaded rod (7) diameter is three centimetres, and the length of the threaded rod (7) is 25 centimetres, and the shape of threaded rod (7) right side is It is round.
4. a kind of efficient sea oil drilling and production atomising device according to claim 1, it is characterised in that: the promotion is lived Plug (11) top and bottom be bonded with the inner surface of water inlet line (1), it is described promotion piston (11) with a thickness of three centimetres.
5. a kind of efficient sea oil drilling and production atomising device according to claim 1, it is characterised in that: the through-hole (13) with a thickness of two centimetres, the diameter of the through-hole (13) is 25 centimetres.
6. a kind of efficient sea oil drilling and production atomising device according to claim 1, it is characterised in that: the bellmouth (12) quantity is eight, and eight bellmouth (12) circular arrays.
7. a kind of efficient sea oil drilling and production atomising device according to claim 1, it is characterised in that: first mist The diameter for changing hole (20) is three millimeters, and the diameter of second orifice (24) is 3/2nds millimeters, first orifice (20) and the quantity of the second orifice (24) is no less than 100.
8. a kind of efficient sea oil drilling and production atomising device according to claim 1, it is characterised in that: the headstock (3) connection type between threaded rod (7) and stepper motor (4) is welding, the bearing block (26) and mist net (27) out with The connection type acted between block (14) is also welding.
CN201711351910.4A 2017-12-15 2017-12-15 A kind of efficient sea oil drilling and production atomising device Expired - Fee Related CN108097493B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111827929B (en) * 2020-07-22 2021-06-29 孔翠龙 High-efficient oil is bored and is adopted atomizing device
CN112459759B (en) * 2020-11-23 2021-08-03 河南理工大学 Coal mine underground coal seam fracturing coal seam gas extraction device

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US3669419A (en) * 1970-02-18 1972-06-13 Danfoss As Atomizing nozzle, particularly for oil-burners
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CN2803532Y (en) * 2005-06-23 2006-08-09 上海大屯能源股份有限公司 Pneumatic solid particles spray gun
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CN206429222U (en) * 2016-12-08 2017-08-22 中海艾普油气测试(天津)有限公司 A kind of atomizer for sea oil drilling and production
CN207641702U (en) * 2017-11-05 2018-07-24 江西省舜典环保科技有限公司 A kind of environmental project atomising device

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Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669419A (en) * 1970-02-18 1972-06-13 Danfoss As Atomizing nozzle, particularly for oil-burners
CN2612465Y (en) * 2003-03-27 2004-04-21 刘堂贵 Spraying machine having a pressure regulating valve module
CN2803532Y (en) * 2005-06-23 2006-08-09 上海大屯能源股份有限公司 Pneumatic solid particles spray gun
CN206262730U (en) * 2016-12-02 2017-06-20 天津开发区合普工贸有限公司 Grease type viscous liquid high-efficiency atomizer
CN206429222U (en) * 2016-12-08 2017-08-22 中海艾普油气测试(天津)有限公司 A kind of atomizer for sea oil drilling and production
CN207641702U (en) * 2017-11-05 2018-07-24 江西省舜典环保科技有限公司 A kind of environmental project atomising device

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Effective date of registration: 20190510

Address after: 257500 North of Meichen South Road, Kenli Development Zone, Dongying City, Shandong Province

Applicant after: Shandong Ruilier Petroleum Equipment Co.,Ltd.

Address before: 312551 No. 62 Caijiawan Village, Shuangcai Township, Xinchang County, Shaoxing City, Zhejiang Province

Applicant before: Sheng Jiang

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Granted publication date: 20190723