CN104565813A - Liquid nitrogen truck - Google Patents
Liquid nitrogen truck Download PDFInfo
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- CN104565813A CN104565813A CN201510028829.7A CN201510028829A CN104565813A CN 104565813 A CN104565813 A CN 104565813A CN 201510028829 A CN201510028829 A CN 201510028829A CN 104565813 A CN104565813 A CN 104565813A
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Abstract
The invention discloses a liquid nitrogen truck which comprises a truck chassis, and more than two engines, at least one radiator, more than two hydraulic pumps, more than two hydraulic motors, a transfer case, a transmission shaft, a liquid nitrogen plunger pump, low-pressure manifold, a liquid nitrogen tank, a high-pressure manifold and an evaporator which are arranged on the truck chassis, wherein the engines are connected to the hydraulic pumps; the hydraulic pumps are used for transmitting power to the hydraulic motor; the hydraulic motors are connected to one end of the transmission shaft under the driving of the transfer case, and the liquid nitrogen plunger pump is connected at the other end of the transmission shaft; the outlet of the liquid nitrogen tank is connected to the inlet of the low-pressure manifold, and the liquid nitrogen plunger pump is connected to the outlet of the low-pressure manifold and the inlet of the liquid nitrogen high-pressure manifold; the outlet of the liquid nitrogen high-pressure manifold is connected to the inlet of the evaporator; and the outlet of the evaporator is connected to the nitrogen discharging high-pressure manifold. By implementing the liquid nitrogen truck disclosed by the invention, while the requirements on output power are satisfied, the cost of the finished truck is reduced, step-less speed change is achieved, and liquid nitrogen displacement and pressure coverage range are expanded, so that the finished truck is more compact in structural arrangement.
Description
Technical field
The present invention relates to nitrogen technical field of operation, particularly relate to a kind of liquid nitrogen pump vehicle.
Background technique
The features such as, good stability low based on density of nitrogen, easily compression, when utilizing nitrogen to process oil well, oil reservoir, not only safely, save time, fast, efficiently, success rate is high, except being applicable to conventional oil reservoir, in low pressure, the special oil and gas pools such as hypotonic, clay is cementing, also there is original effect.It has a wide range of applications in raising recovery rate and drilling well, perforation, well stimulation and well workover etc., and such as nitrogen gaslift, nitrogen displacement, mixed air pressure split, mix gas acidifying, nitrogen positive/negative-pressure perforation, nitrogen cushion test etc.In natural gas extraction, nitrogen fracturing technique Be very effective in natural gas extraction, has become the indispensable technology in construction of natural gas fields process, has been widely used.In addition, in coal-bed gas exploitation, with stimulation technology one of developing direction becoming Coal-seam Gas Recovery Technologies that nitrogen is gas displacing coal-bed.
The key equipment of nitrogen operation is liquid nitrogen pump vehicle.In prior art, liquid nitrogen pump vehicle generally comprises chassis and is arranged at the liquid nitrogen container on chassis-body, motor, transmission case, transmission shaft, high-pressure liquid nitrogen plunger pump (multi-cylinder liquid nitrogen plunger pump), low-pressure manifold, high pressure pipe joint, vaporizer etc., wherein, liquid nitrogen container is arranged in the afterbody on chassis, high-pressure liquid nitrogen plunger pump is positioned at the front side of liquid nitrogen container, high pressure pipe joint can comprise liquid nitrogen high pressure pipe joint and nitrogen discharges high pressure pipe joint, the effect of liquid nitrogen container stores liquid nitrogen, transmission case is passed through in the effect of motor, transmission shaft provides driving force to high-pressure liquid nitrogen plunger pump, the effect of high-pressure liquid nitrogen plunger pump is, by low-pressure manifold, the low pressure liquid nitrogen of liquid nitrogen container supply is increased to high pressure, and high-pressure liquid nitrogen is pumped to vaporizer by liquid nitrogen high pressure pipe joint, the effect of vaporizer is heated to by the liquid nitrogen of high pressure pumping under uniform temperature to become gaseous nitrogen, and by nitrogen discharge high pressure pipe joint, high pressure nitrogen is delivered in pit shaft.
At present, due to construct nitrogen discharge capacity required and increasing pressure large, the various aspects of performance for liquid nitrogen pump vehicle is had higher requirement, but existing liquid nitrogen pump vehicle is more and more difficult to meet this requirement.Such as, in existing liquid nitrogen pump vehicle, the cost of the component of its motor, high-pressure liquid nitrogen plunger pump and transmission system especially transmission case is higher, during the larger liquid nitrogen pump vehicle of if desired production output power, cost needed for these parts will rise rapidly, and procurement cycle is long, be thus difficult to meet the market demand increased fast.
In addition, the transmission case of existing liquid nitrogen pump vehicle is step change, makes the discharge capacity of liquid nitrogen pump vehicle discontinuous like this, nitrogen discharge capacities different under cannot adapting to various execution conditions better and pressure requirements.
Summary of the invention
In view of this, the present invention aims to provide a kind of liquid nitrogen pump vehicle, can while meeting demanded power output, effective reduction integral vehicle cost, realizes electrodeless variable-speed, promotes the coverage area of liquid nitrogen discharge capacity and pressure, contribute to that complete vehicle structure is arranged compacter, improve the convenience safeguarded and keep in repair.
Further, liquid nitrogen pump vehicle of the present invention comprise chassis of vehicle body and it is arranged two or more motor, at least one radiator, two or more oil hydraulic pump, two or more oil hydraulic motor, transfer case, transmission shaft, liquid nitrogen plunger pump, low-pressure manifold, liquid nitrogen container, high pressure pipe joint and vaporizer; Wherein, two or more motor connects two or more oil hydraulic pump respectively, two or more oil hydraulic pump is by transmission of power to two or more oil hydraulic motor, and two or more oil hydraulic motor drives the one end being connected to transmission shaft by transfer case, and the other end of transmission shaft connects liquid nitrogen plunger pump; High pressure pipe joint comprises liquid nitrogen high pressure pipe joint and nitrogen discharges high pressure pipe joint; The outlet of liquid nitrogen container connects the import of low-pressure manifold, and liquid nitrogen plunger pump connects the outlet of low-pressure manifold and the import of liquid nitrogen high pressure pipe joint; The outlet of liquid nitrogen high pressure pipe joint is connected with the import of vaporizer, and the outlet of vaporizer is connected to nitrogen and discharges high pressure pipe joint.
Alternatively, in certain embodiments, above-mentioned motor is two, is respectively the first motor and the second motor; Above-mentioned oil hydraulic pump is two, is respectively the first oil hydraulic pump and the second oil hydraulic pump; Wherein, the first motor and the second motor connect one to one respectively by coupling and the first oil hydraulic pump, the second oil hydraulic pump.
Alternatively, in certain embodiments, liquid nitrogen container is arranged in the tail region on chassis of vehicle body; Before first motor, the second motor, the first oil hydraulic pump, the second oil hydraulic pump, low-pressure manifold, high pressure pipe joint and vaporizer are arranged in liquid nitrogen container.
Alternatively, in certain embodiments, the first motor and the second motor are arranged side by side in the front area of chassis of vehicle body.
Alternatively, in certain embodiments, radiator passes through the first rack arrangement in the front area of chassis of vehicle body, and is positioned at the top of the first motor and the second motor.
Alternatively, in certain embodiments, vaporizer by the central region of the second rack arrangement on chassis of vehicle body, and is positioned at the top of oil hydraulic motor, transfer case, transmission shaft, liquid nitrogen plunger pump and high pressure pipe joint.
Alternatively, in certain embodiments, liquid nitrogen pump vehicle also comprises the vaporizer for regulating the pressure in described liquid nitrogen container, and vaporizer is arranged at the below of liquid nitrogen container.
Alternatively, in certain embodiments, liquid nitrogen pump vehicle also comprises the suction booster for providing enough net pressure heads for described liquid nitrogen plunger pump suction side, and suction booster is connected on the low-pressure manifold between liquid nitrogen container and liquid nitrogen plunger pump.
Alternatively, in certain embodiments, liquid nitrogen pump vehicle also comprises suction booster, and the import of suction booster is connected to the outlet of liquid nitrogen container, and supercharging delivery side of pump is connected to the import of low-pressure manifold.
Alternatively, in certain embodiments, when motor is for driving oil hydraulic pump described in two or more, connect between oil hydraulic pump described in two or more.
Therefore, in the present invention, adopt two motors as power source, multiple oil hydraulic pump is by two engine-driving, can be met the requirement of output power by hydraulicdriven mode, and eliminate the parts such as transmission case and transmission shaft, type selecting facilitates and effectively can reduce integral vehicle cost.And by the fuel system of adjustment oil hydraulic pump to liquid nitrogen plunger pump, liquid nitrogen discharge capacity continuously adjustabe can be made, realize electrodeless variable-speed, add the coverage area of liquid nitrogen discharge capacity and pressure, the convenience that the structural configuration of car load is compacter and improve overall maintenance and keep in repair can be made.
More characteristics and advantages of the present invention are explained in embodiment afterwards.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
The liquid nitrogen pump vehicle that Fig. 1 provides for the embodiment of the present invention is at the structural representation of the first side-looking angle;
Fig. 2 is for liquid nitrogen pump vehicle shown in Fig. 1 is at the structural representation of the second side-looking angle.
Number in the figure illustrates:
1 chassis of vehicle body
2 first motors
3 radiators
4 first oil hydraulic pumps
5 oil hydraulic motors
6 transfer cases
7 transmission shafts
8 liquid nitrogen plunger pumps
9 low-pressure manifolds
10 liquid nitrogen containers
11 vaporizers
12 suction boosters
13 high pressure pipe joints
14 vaporizers
15 second oil hydraulic pumps
16 second motors
Embodiment
To it should be pointed out that in this part to the description of concrete structure and description order it is only explanation to specific embodiment, should not be considered as there is any restriction to protection scope of the present invention.In addition, when not conflicting, the embodiment in this part and the feature in embodiment can combine mutually.
Please also refer to Fig. 1 and Fig. 2, elaborate below in conjunction with the liquid nitrogen pump vehicle of accompanying drawing to the embodiment of the present invention.
As shown in the figure, the liquid nitrogen pump vehicle of this embodiment can comprise chassis of vehicle body 1, and two or more motor, at least one radiator 3, two or more oil hydraulic pump, two or more oil hydraulic motor 5, transfer case 6, transmission shaft 7, liquid nitrogen plunger pump 8, low-pressure manifold 9, liquid nitrogen container 10, high pressure pipe joint 13 and vaporizer 14 that it is arranged.
Wherein, two or more motor connects two or more oil hydraulic pump respectively, two or more oil hydraulic pump is by transmission of power to two or more oil hydraulic motor 5, and two or more oil hydraulic motor 5 drives the one end being connected to transmission shaft 7 by transfer case 6, and the other end of transmission shaft 7 connects liquid nitrogen plunger pump 8; High pressure pipe joint 13 comprises liquid nitrogen high pressure pipe joint and nitrogen discharges high pressure pipe joint (not marking in figure); The outlet of liquid nitrogen container 10 connects the import of low-pressure manifold 9, and liquid nitrogen plunger pump 8 connects the outlet of low-pressure manifold 9 and the import of liquid nitrogen high pressure pipe joint; The outlet of liquid nitrogen high pressure pipe joint is connected with the import of vaporizer 14, and the outlet of vaporizer 14 is connected to nitrogen and discharges high pressure pipe joint.
In above-described embodiment, two or more motor connects two or more oil hydraulic pump respectively, or can say, a motor is for driving at least one oil hydraulic pump.Further, when motor is identical with the number of oil hydraulic pump, such as motor is two and oil hydraulic pump is two, and a motor is for driving an oil hydraulic pump; When motor is two or more than two, and oil hydraulic pump more than two time, each motor is for driving at least one oil hydraulic pump.It should be noted that, when a motor is for driving two and above oil hydraulic pump, connect between plural oil hydraulic pump, the present embodiment is not restricted quantity.Be understandable that, when the number of motor is less than or equal to the number of oil hydraulic pump, the idle waste of motor can not be caused.
Such as, motor is two, is respectively the first motor 2 and the second motor 16; Oil hydraulic pump is two, is respectively the first oil hydraulic pump 4 and the second oil hydraulic pump 15, first motor 2 and the second motor 16 and connects one to one respectively by coupling and the first oil hydraulic pump 4, second oil hydraulic pump 15.
In above-described embodiment, two or more oil hydraulic pump by transmission of power to two or more oil hydraulic motor 5, such as, an oil hydraulic pump is for driving at least one oil hydraulic motor 5, about the scheme of single oil hydraulic pump or the single oil hydraulic motor of multiple hydraulic pump drive or multiple oil hydraulic motor see the associated description of prior art, no longer can launch explanation at this.In addition, when the number of oil hydraulic pump is less than or equal to the number of oil hydraulic motor 5, the idle waste of oil hydraulic pump can not be caused.Each oil hydraulic motor 5 drives the one end being connected to transmission shaft 7 by transfer case 6, the other end of transmission shaft 7 connects liquid nitrogen plunger pump 8.
Wherein, the outlet of liquid nitrogen container 10 is connected to the import of low-pressure manifold 9 by pipeline, liquid nitrogen container 10 can be arranged in the tail region on chassis of vehicle body 1, first motor 2, second motor 16, high pressure pipe joint 13, low-pressure manifold 9, multiple oil hydraulic pump and vaporizer 14 can be arranged on the car body on front side of liquid nitrogen container 10, in the present embodiment, " front " refers to that direction of advance of walking with chassis of vehicle body 1 is identical, and " afterwards " refers to contrary with this direction of advance.
First oil hydraulic pump 4, second oil hydraulic pump 15 is by transmission of power to two or more oil hydraulic motor 5, and each oil hydraulic motor 5 is connected to transfer case 6, drives transmission shaft 7 by transfer case 6, and transmission shaft 7 the other end connects liquid nitrogen plunger pump 8, thus realizes liquid nitrogen supercharging.
Below in conjunction with concrete scene, the illustratively working principle of the liquid nitrogen pump vehicle of above-described embodiment:
In nitrogen operation process, first motor 2 and the running of the second motor 16 drive each oil hydraulic pump, oil hydraulic pump by transmission of power to oil hydraulic motor 5, oil hydraulic motor 5 drives transmission shaft 7 by transfer case 6, transmission shaft 7 drives liquid nitrogen plunger pump 8, the liquid nitrogen that liquid nitrogen container 10 is supplied in low-pressure manifold 9 by liquid nitrogen plunger pump 8 sucks, and is pumped in liquid nitrogen high pressure pipe joint by high-pressure liquid nitrogen after supercharging.And so forth, realize the continuous input of low pressure liquid nitrogen and the continuous output of high-pressure liquid nitrogen, the high-pressure liquid nitrogen exported arrives vaporizer 14 through liquid nitrogen high pressure pipe joint, the liquid nitrogen of high pressure pumping is heated to uniform temperature and is vaporized by vaporizer 14, and is delivered in pit shaft by high pressure nitrogen by nitrogen discharge high pressure pipe joint.
From the foregoing, in the above-described embodiments, adopt two or more motor, two or more oil hydraulic pump and oil hydraulic motor 5, in conjunction with the kind of drive of transfer case 6 and transmission shaft 7, adopt hydraulic transmission transferring power, thus avoid the transmission case of selecting cost higher, can meet the requirement of liquid nitrogen pump vehicle output power, type selecting is convenient and effectively can reduce integral vehicle cost.And, when adopting plural motor, under the prerequisite meeting peak output, the power that each motor is born can effectively reduce, thus, common low-powered engine can be selected, expand type selecting scope like this, correspondingly, each oil hydraulic pump and each oil hydraulic motor type selecting scope also can expand further; In addition, after adopting this kind of drive, each motor, each oil hydraulic pump and each oil hydraulic motor are easy to obtain, and without the need to being subject to import, special restriction, thus effectively can reduce the component costs of liquid nitrogen pump vehicle transmission system; In addition, after adopting this kind of drive, if after some motors, oil hydraulic pump or oil hydraulic motor damage, whole transmission system still can ensure that fracturing work proceeds a period of time, thus effectively improve safety redundancy (reliability), reduce the risk that loss occurs construction party.
In addition, when needing discharge capacity and the pressure adjusting liquid nitrogen, the pressure oil flow can supplied to liquid nitrogen plunger pump 8 by adjustment oil hydraulic pump, makes discharge capacity and the pressure consecutive variations of liquid nitrogen, until desired value.Therefore, due to the discharge capacity continuously adjustabe of liquid nitrogen, achieve electrodeless variable-speed, expand the coverage area of liquid nitrogen discharge capacity and pressure, improve performance and the adaptive capacity of liquid nitrogen pump vehicle, and the convenience that the structural configuration of car load is compacter and improve overall maintenance and keep in repair can be made.
As the optional mode of execution of one, in above-mentioned any embodiment, in order to provide enough net pressure heads to liquid nitrogen plunger pump suction side, suction booster 12 can be set on the low-pressure manifold 9 being exported between liquid nitrogen plunger pump 8 being connected to liquid nitrogen container 10.
In addition, optionally, in order to regulate the internal pressure of liquid nitrogen container 10, can arrange vaporizer 11 in the below of liquid nitrogen container 10, the part liquid nitrogen in liquid nitrogen container 10 can be converted into gas by vaporizer 11, and then improves the pressure of liquid nitrogen container 10 outlet, is convenient to export.
It should be noted that, in order to optimize the layout of each several part on car body further, while guarantee is safeguarded and is keeped in repair convenience, make complete machine structure compacter, can the first motor 2 and the second motor 16 be arranged side by side in the front area of chassis of vehicle body 1, chassis of vehicle body 1 can also arrange radiator 3, as depicted in figs. 1 and 2, this radiator 3 can be arranged in the front area on chassis of vehicle body 1 by the first support (not indicating in figure), and is positioned at the top of the first motor 2 and the second motor 16.Vaporizer 14 can be arranged in the central region on chassis of vehicle body 1 by the second support (not indicating in figure), and is positioned at the top of each oil hydraulic cylinder and each plunger case.Like this, the complete machine height of liquid nitrogen pump vehicle can be made to meet transportation demand, compact structure, be convenient to maintenance simultaneously and safeguard.
These are only preferred embodiment of the present invention, not in order to limit the present invention, 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 (10)
1. a liquid nitrogen pump vehicle, it is characterized in that, comprising: chassis of vehicle body (1) and two or more motor, at least one radiator (3), two or more oil hydraulic pump, two or more oil hydraulic motor (5), transfer case (6), transmission shaft (7), liquid nitrogen plunger pump (8), low-pressure manifold (9), liquid nitrogen container (10), high pressure pipe joint (13) and vaporizer (14) that it is arranged;
Wherein, described two or more motor connects described two or more oil hydraulic pump respectively, described two or more oil hydraulic pump is by transmission of power extremely described two or more oil hydraulic motor (5), described two or more oil hydraulic motor (5) drives the one end being connected to described transmission shaft (7) by described transfer case (6), the other end of described transmission shaft (7) connects described liquid nitrogen plunger pump (8);
Described high pressure pipe joint (13) comprises liquid nitrogen high pressure pipe joint and nitrogen discharges high pressure pipe joint; The outlet of described liquid nitrogen container (10) connects the import of described low-pressure manifold (9), and described liquid nitrogen plunger pump (8) connects the outlet of described low-pressure manifold (9) and the import of described liquid nitrogen high pressure pipe joint; The outlet of described liquid nitrogen high pressure pipe joint is connected with the import of described vaporizer (14), and the outlet of described vaporizer (14) is connected to described nitrogen and discharges high pressure pipe joint.
2. liquid nitrogen pump vehicle according to claim 1, is characterized in that, described motor is two, is respectively the first motor (2) and the second motor (16); Described oil hydraulic pump is two, is respectively the first oil hydraulic pump (4) and the second oil hydraulic pump (15);
Wherein, described first motor (2) and described second motor (16) connect one to one respectively by coupling and described first oil hydraulic pump (4), described second oil hydraulic pump (15).
3. liquid nitrogen pump vehicle according to claim 2, is characterized in that, described liquid nitrogen container (10) is arranged in the tail region on described chassis of vehicle body (1); Before described first motor (2), described second motor (16), described first oil hydraulic pump (4), described second oil hydraulic pump (15), described low-pressure manifold (9), described high pressure pipe joint (13) and described vaporizer (14) are arranged in described liquid nitrogen container (10).
4. liquid nitrogen pump vehicle according to claim 3, is characterized in that, described first motor (2) and described second motor (16) are arranged side by side in the front area of described chassis of vehicle body (1).
5. liquid nitrogen pump vehicle according to claim 4, it is characterized in that, described radiator (3) by the front area of the first rack arrangement in described chassis of vehicle body (1), and is positioned at the top of described first motor (2) and described second motor (16).
6. liquid nitrogen pump vehicle according to claim 5, it is characterized in that, described vaporizer (14) by the central region of the second rack arrangement on described chassis of vehicle body (1), and is positioned at the top of described oil hydraulic motor (5), described transfer case (6), described transmission shaft (7), described liquid nitrogen plunger pump (8) and described high pressure pipe joint (13).
7. the liquid nitrogen pump vehicle according to any one of claim 1 to 6, it is characterized in that, described liquid nitrogen pump vehicle also comprises the vaporizer (11) for regulating the pressure in described liquid nitrogen container (10), and described vaporizer (11) is arranged at the below of described liquid nitrogen container (10).
8. liquid nitrogen pump vehicle according to claim 7, it is characterized in that, described liquid nitrogen pump vehicle also comprises the suction booster (12) for providing enough net pressure heads for described liquid nitrogen plunger pump (8) suction side, and described suction booster (12) is connected on the described low-pressure manifold (9) between described liquid nitrogen container (10) and described liquid nitrogen plunger pump (8).
9. the liquid nitrogen pump vehicle according to any one of claim 1 to 6, it is characterized in that, described liquid nitrogen pump vehicle also comprises the suction booster (12) for providing enough net pressure heads for described liquid nitrogen plunger pump (8) suction side, and described suction booster (12) is connected on the described low-pressure manifold (9) between described liquid nitrogen container (10) and described liquid nitrogen plunger pump (8).
10. liquid nitrogen pump vehicle according to claim 1, is characterized in that, when described motor is for driving oil hydraulic pump described in two or more, connects described in two or more between oil hydraulic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510028829.7A CN104565813B (en) | 2015-01-20 | 2015-01-20 | Liquid nitrogen truck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510028829.7A CN104565813B (en) | 2015-01-20 | 2015-01-20 | Liquid nitrogen truck |
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| CN104565813A true CN104565813A (en) | 2015-04-29 |
| CN104565813B CN104565813B (en) | 2017-01-18 |
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| CN201510028829.7A Active CN104565813B (en) | 2015-01-20 | 2015-01-20 | Liquid nitrogen truck |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090741A (en) * | 2015-09-02 | 2015-11-25 | 三一重型能源装备有限公司 | Liquid nitrogen pump casting device and liquid nitrogen pump truck |
| CN106322104A (en) * | 2016-10-09 | 2017-01-11 | 山东恒业石油新技术应用有限公司 | Large-displacement all-hydraulic mixing evaporative type liquid nitrogen pump truck |
| CN107649459A (en) * | 2017-10-30 | 2018-02-02 | 齐鲁工业大学 | Cleaning device based on liquid nitrogen |
| CN108278488A (en) * | 2018-03-27 | 2018-07-13 | 铁岭陆平专用汽车有限责任公司 | Liquid nitrogen pump vehicle |
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| US4290271A (en) * | 1980-03-06 | 1981-09-22 | Waukesha-Pearce Industries, Inc. | Nitrogen liquid to gas converter |
| CN202149354U (en) * | 2011-07-20 | 2012-02-22 | 烟台杰瑞石油装备技术有限公司 | Liquid nitrogen car |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090741A (en) * | 2015-09-02 | 2015-11-25 | 三一重型能源装备有限公司 | Liquid nitrogen pump casting device and liquid nitrogen pump truck |
| CN106322104A (en) * | 2016-10-09 | 2017-01-11 | 山东恒业石油新技术应用有限公司 | Large-displacement all-hydraulic mixing evaporative type liquid nitrogen pump truck |
| CN107649459A (en) * | 2017-10-30 | 2018-02-02 | 齐鲁工业大学 | Cleaning device based on liquid nitrogen |
| CN108278488A (en) * | 2018-03-27 | 2018-07-13 | 铁岭陆平专用汽车有限责任公司 | Liquid nitrogen pump vehicle |
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| Publication number | Publication date |
|---|---|
| CN104565813B (en) | 2017-01-18 |
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Effective date of registration: 20161229 Address after: 102206 South Beijing city of Changping District science and Technology Park 31 manufacturing center of Beijing Liu Lu Li Applicant after: 31 petroleum Intelligent Equipment Co., Ltd. Address before: 102206 Changping District City, North Road, Beijing, the 31 Industrial Park Applicant before: SANY HEAVY ENERGY EQUIPMENT CO., LTD. |