CN104692146A - Fixed sand feeding system of locomotive - Google Patents
Fixed sand feeding system of locomotive Download PDFInfo
- Publication number
- CN104692146A CN104692146A CN201510071357.3A CN201510071357A CN104692146A CN 104692146 A CN104692146 A CN 104692146A CN 201510071357 A CN201510071357 A CN 201510071357A CN 104692146 A CN104692146 A CN 104692146A
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- China
- Prior art keywords
- sand
- locomotive
- storehouse
- station
- fixing upper
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G67/00—Loading or unloading vehicles
- B65G67/02—Loading or unloading land vehicles
- B65G67/04—Loading land vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
- B65G69/185—Preventing escape of dust by means of non-sealed systems
- B65G69/186—Preventing escape of dust by means of non-sealed systems with aspiration means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2814/00—Indexing codes relating to loading or unloading articles or bulk materials
- B65G2814/03—Loading or unloading means
- B65G2814/0301—General arrangements
Abstract
The invention relates to a fixed sand feeding system of a locomotive. The fixed sand feeding system comprises a sand storing warehouse, a dust removing system by filtration, a pneumatic conveying system, a comprehensive conveying pipeline system and at least one sand adding station, wherein the dust removing system by filtration is mounted on one side of the sand storing warehouse; the pneumatic conveying system is mounted under the sand storing warehouse, and an automatic closing valve is arranged at a connecting position between the pneumatic conveying system and the sand storing warehouse; the dust removing system by filtration and the pneumatic conveying system are respectively connected with the sand adding stations through the comprehensive conveying pipeline system, and each sand adding station is provided with an automatic air return system and an automatic metering and cost checking system; the fixed sand feeding system of the locomotive further comprises an air compressor set, an electric switch and a control system, wherein the air compressor set is arranged close to the sand storing warehouse. According to the structure, the fixed sand feeding system of the locomotive can improve the locomotive servicing efficiency, can reduce the labor intensity, can improve the servicing quality and can improve the work environment of a worker; besides, the automatic metering and cost checking system is adopted, so that the sand adding amount is accurately metered, and the problems in checking the servicing cost of the locomotive of different offices are solved.
Description
Technical field
The present invention relates to the fixing upper sand system of a kind of locomotive, sand technical field on the locomotive of locomotive servicing field.
Background technology
In recent years, Chinese Railway syntonic type locomotive proportion increased year by year.So far, newly-increased quantity is mainly harmonious high-power locomotive, and harmonious locomotive owning amount is more than 6000, and 12 Railway Bureaus paid by these locomotives, is arranged using by 31 locomotive depots.Along with deepening continuously of Railway Reform and railway speed increase; the lengthening of locomotive routing; the increase of the increase in locomotive servicing cycle and bus attendant handing-over number of times; sand using amount gets more and more; for guaranteeing that locomotive needs to have sufficient sand with (as high speed emergency braking, idle running and startup etc.) during sand, adding sand problem becomes the important ring reorganizing and outfit locomotive daily management.
Although the research-and-development activity of sand system has carried out a lot of year on locomotive, the practical situations of equipment has been not that maintenance and repair rate is higher very well.Current most locomotive depot reorganizes and outfit field and substantially adopts artificial upper sand mode.The fixing upper sand equipment of domestic existing locomotive depot (institute) is forced to stop using because of Frequent Troubles mostly after use 2-3.Mainly contain the dry impurity elimination process of braking sand cannot ensure, cause sand delivering pipeline to leak, blocking and wearing and tearing, Air compressor pressurized air cannot be up to standard etc. reason.More importantly, upper sand equipment temporarily cannot process braking sand in impurity and dust, bring greater impact to environment and health of human body.
Sand mode is manually added in order to change backward hand push.In movement, sand equipment obtains apply in Wuhan office, Shenyang office.Mobile device is primarily of mobile upper sand dolly, bucket elevator composition.Upper sand dolly is that seat drives electric walking, and turn radius is little, forerunner's rear steering, flexible operation.Equipment is sending cans Geldart-D particle, mass transport distance, and has device for recovering powder, and add sand speed fast, separate unit locomotive servicing added sand production time in 5 minutes, and operating personnel only needs 1 people.Consider actual, reorganize and outfit a place by each road bureau and limit, in movement, sand equipment cannot be crossed rail, through narrow space and platform, therefore temporarily not have widespread use.
Current, because artificial upper sand operation is dirty tired, young worker is unwilling to do, and each locomotive depot adds the sand operating personnel mean age all more than 50 years old, and a lot of stations section has to this work to be contracted out to service unit, and responsibility safety is all uncontrollable.Reorganize and outfit place for this section of river bank locomotive depot, per tour is equipped with 3-4 name and adds sand work, and complete and reorganize and outfit 60, locomotive day, add sand 6-8t, substantially shoulder by people, hand push adds sand toward sandbox, upper sand personnel labor intensity is large.And advance along with the large cross-channel of railway, the reform of reorganizing and outfit greatly, much reorganizing and outfit field is all that locomotive is concentrated and arrived, and upper sand personnel need concentrative operation, complete the upper sand work of a large amount of locomotive in a short period of time, and efficiency cannot satisfy the demands.Again because sand material is carried from sand room, is filled in locomotive sand box, sand material is all exposed, not only easily spills but also easily produce dust, very large to the health effect of laborer, and meanwhile, sand dust also having a significant impact the clean and tidy of operation field.Sand material is exposed at the scene, and sand is caught in the rain, woven bag, foreign matter all very easily join in sandbox, and impact normally uses.
In sum, on China's locomotive, sand remains unchanged that ubiquity efficiency is low, labour intensity is large, cannot add sand amount, add that sand process sand grains is scattered and the problem such as airborne dust is comparatively large, security risk is large by accurate-metering.These had both affected the effect and quality of locomotive servicing, can affect again the physical and mental health of workman.
Along with the fast development of Chinese Railway, railway mileage and high-power locomotive quantity constantly increase, and force to reorganize and outfit efficiency and need improve constantly, and servicing work interval time constantly reduces.Therefore it is also fewer and feweri to leave the time adding sand operation for.Therefore, for improving locomotive servicing efficiency, ensure locomotive servicing quality, the fixing upper sand system of locomotive of development high efficient and reliable is imperative.
Summary of the invention
The object of the invention is to the defect overcoming prior art, provide one and can improve locomotive servicing efficiency, ensure locomotive servicing quality, reduce the fixing upper sand system of locomotive of labour intensity.
The present invention is achieved in that
The invention provides the fixing upper sand system of a kind of locomotive, comprise storage sand storehouse, dust removal by filtration system, pneumatic conveyor system, comprehensive pipeline system and at least one add sand station; Described dust removal by filtration system is installed on the side in described storage sand storehouse, and is connected with the top in described storage sand storehouse; Described pneumatic conveyor system is installed on the below in described storage sand storehouse, and is connected with the bottom in described storage sand storehouse, and both junctions are provided with self-closing valve; Described dust removal by filtration system and described pneumatic conveyor system add sand station described in being all connected by described comprehensive pipeline system, add sand station described in each and be respectively equipped with automatic air return system and automatic gauge and cost accounting system, described in add sand station and be installed on ground, house frame or inspection platform; The fixing upper sand system of described locomotive also comprises air-compressor set and electric switch and control system, and described air-compressor set is arranged near described storage sand storehouse.
Further, it is inner or outside that described storage sand storehouse is installed on storage sand room, and described storage sand storehouse has a screening plant and support frame, offers at the lower position in described storage sand storehouse the door that can lock.
Further, the lower end of described dust removal by filtration system is provided with the dust tank for collecting dust.
Further, described comprehensive pipeline system is processed into by carbon steel.
Further, on the pipeline of described comprehensive pipeline system, intermittent is equipped with air pressurizing unit.
Further, add sand station described in have and add sand rifle, import head, sand station cylinder, connection pipe and air pressure valve.
Further, described electric switch and control system comprise switch cubicle and control housing, and the Qianmen of described switch cubicle is furnished with simulated chart, and described control housing inside is provided with long distance service system.
The present invention has following beneficial effect:
The fixing upper sand system of described locomotive comprise storage sand storehouse, dust removal by filtration system, pneumatic conveyor system, comprehensive pipeline system and at least one add sand station, the fixing upper sand system of described locomotive can greatly improve locomotive servicing efficiency by said structure, reduces labour intensity; Improve curb mass, improve the working environment of workers; Adopt automatic gauge and cost accounting system, accurate-metering adds sand amount simultaneously, and solves the problem across office's locomotive servicing cost keeping.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 fixes the structural representation of upper sand system for locomotive that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of protection of the invention.
As Fig. 1, the embodiment of the present invention provides a kind of locomotive fixing upper sand system, comprise storage sand storehouse 1, dust removal by filtration system 2, pneumatic conveyor system 3, comprehensive pipeline system 4 and at least one add sand station 5; Described dust removal by filtration system 2 is installed on the side in described storage sand storehouse 1, and is connected with the top in described storage sand storehouse 1; Described pneumatic conveyor system 3 is installed on the below in described storage sand storehouse 1, and is connected with the bottom in described storage sand storehouse 1, and both junctions are provided with self-closing valve; Described dust removal by filtration system 2 and described pneumatic conveyor system 3 add sand station 5 described in being all connected by described comprehensive pipeline system 4, add sand station 5 described in each and be respectively equipped with automatic air return system 6 and automatic gauge and cost accounting system 9, described in add sand station 5 and be installed on ground, house frame or inspection platform; The fixing upper sand system of described locomotive also comprises air-compressor set and electric switch and control system, and described air-compressor set is arranged near described storage sand storehouse 1.
As Fig. 1, described storage sand storehouse 1, is mainly used in screening and the storage storage of sand material.The agent structure in sand storehouse about has the effective capacity of 6-30m3, is generally arranged on inside or the outside in storage sand room.On storage sand storehouse 1, sand adopts the screening plant of a bucket elevator, sand material, and transport of sand fills storage sand storehouse 1.Need guarantee that the braking sand injected is that dry, foreign pollutes, even if like this in the winter of cold, the storage sand storehouse 1 of outdoor also can coordinate with upper sand equipment and normally works.Storage sand storehouse 1 has functions such as freezing frost protection, illumination, also comprises the grade limit switch of " the fullest " and " meta "." meta " probe display in storage sand storehouse 1 fills the level reached, and can confirm when will order fresh sand the latest like this.The accurate location of this probe limit switch, should consider that actual demand determines together with client.Storage sand storehouse 1 is furnished with support frame and a door locked at lower position, and formed by the manufacture of steel structure material integral solder, wall thickness requires selection according to static state.Concrete for offer at the lower position in described storage sand storehouse 1 door that can lock.
As Fig. 1, described dust removal by filtration system 2, is arranged on storage side, sand storehouse 1, mainly contains two aspect dedusting work: first, fills in sand process in storage sand storehouse 1, can filter dust and the waste gas of the generation of braking sand; Also can clean all sand stations 5 that adds in whole upper sand system and add the dust and waste gas that produce in sand operation.A dust tank is equipped with in described dust removal by filtration system 2 lower end, and utilize the framework of motor oscillating or shake suspention filter bag, make cloth bag produce the dust vibrating collection, complete collection work, this dust tank needs regular emptying.
As Fig. 1, described pneumatic conveyor system 3, be arranged on below storage sand storehouse 1, distinctive self-closing valve is arranged on and junction, Sha Cang lower end.Pneumatic conveyor system 3 is that one of device important in sand system fixed by locomotive of the present invention, and its volume and volume size depend on demand and the frequency of sand on actual locomotive.
As Fig. 1, described comprehensive pipeline system 4 is processed into by carbon structural steel, without the need to any special wear proof conservation treatment.Sediment transport pipe diameter is 80mm, and every root 6m is long, is all connected with bolt seal by flange.Described comprehensive pipeline system 4 is born storage sand storehouse 1, dust removal by filtration system 2, pneumatic conveyor system 3, is added the connection work of every facilities such as sand station 5, air-compressor set, electric switch and control system.Pressurized air delivers to feedway by pipeline, each adds sand station 5 and filling device, is furnished with shutoff valve and compressed air governor.The bent tube section of whole comprehensive pipeline system 4, radius bend can not be less than 500mm, diameter 40mm, and pipeline intermittent is equipped with air pressurizing unit.Air pressurizing unit is all furnished with independent driving, by the mode of supercharging air, can ensure the slow sediment transport speed of <1m/s, be kept to minimum to the wearing and tearing of pipeline.
As Fig. 1, described in add sand station 5 and be arranged on ground, house frame or inspection platform.Its quantity is according to the demand of client, and in conjunction with the period of service of sand on on-the-spot locomotive, frequency and position, that can install unequal number amount adds sand station 5.The structure adding sand station 5 is divided into: add several parts such as sand rifle, import head, sand station cylinder, connection pipe, air pressure valve and electrical control.The dust produced in upper sand process and the air of pollution, the subsidiary dedusting flexible pipe Automatic Extraction of sand rifle can be added, and be sucked back in centralized dust-removing system and filter, whole fixing upper sand system is when operation task, to operating personal or the influential dust of environment, pollute and be all isolated, more can not enter the stucco system of locomotive, make dust cause device systems to block.When adding after sand station 5 completes and once go up sand operation, pneumatic conveying container can by control system automatically give less than add sand station 5 stop-off.
As Fig. 1, described automatic air return system 6, respectively from each add sand rifle draw braking sand in dust and waste gas, pass back storage side, sand storehouse 1 dust removal by filtration system 2, ensure free from dust omit at operation task ground or the sandbox entering locomotive.Automatic air return system 6 is mainly plumbing system, connects each and adds sand station 5, pneumatic conveying container, dusting equipment and air-compressor set, controlled to system degasification by automatic purging device.
As Fig. 1, described air-compressor set, storage sand storehouse 1 should be closed in installation site.Wherein the type selecting of Air compressor is mainly estimated according to the operation pressure needed in conveying and gas consumption and selects.If build air compressor house, then according to air-compressor set occupy the interior space 1/3 consider build volume, and hold successfully door and window be beneficial to ventilate and heat radiation.If purchase Air compressor bin, then consider to occupy bin 2/3 to consider volume according to air-compressor set.When the spacing of Air compressor and each gas end pipeline is too far away, the latus rectum of main line suitably should be amplified.If environmental conditions meets the installation requirement of Air compressor and operating mode allows, can install nearby with gas end.
Described electric switch and control system, comprise switch cubicle and control housing.Switch cubicle is furnished with a simulated chart on Qianmen, shows all functions.Control housing is also furnished be necessary operation element.One is installed in control housing by the long distance service system of modem.Client needs the connection providing electric current supply and telephone wire.Control housing is furnished with guidance panel, shows all systemic-functions, and can in upper sand process, display simulation operation picture, and what allow operating personal more clearly understand each sandbox adds sand process, arranges other forked workings on car inspection and maintenance platform better.
Described automatic gauge and cost accounting system 9 can clearly between the section of solution and sections, and between office and office, locomotive servicing adds the cost accounting problem of sand.When locomotive needs to add sand, chaufeur only needs locomotive to reach to add sand station, gets off in automatic teller machine place operation control system, and insert in sandbox adding sand rifle, adding sand system will fill it up with sandbox automatically.Add sand and terminate rear automatic printing receipt, and adding sand facies pass data upload to settle accounts later.After each locomotive adds sand, computer automatically records and preserves data, and cost controller only needs regularly to check out data from automatic gauge and cost accounting system 9 and just completes quantitative statistics work.
The fixing upper sand system of locomotive provided by the invention, adds after locomotive sand box fills it up with by sand rifle, can automatically stop.Control system can automatically from pneumatic conveying equipment toward less than add the stop-off of sand station.
The fixing upper sand system of locomotive provided by the invention, operating personal uses and adds the backward upper pulling of sandpipe, just can will add sand rifle automatic drawing back original position.
The fixing upper sand system of locomotive provided by the invention, sand delivering pipeline with add junction, sand station and adopt the special flexible pipe of movable, after pipeline valve closedown, remain in last section of ducted sand grains and freely fall, save bit by bit and adding sand station import head valve mouth.
The fixing upper sand system of locomotive provided by the invention, after adding the sand end of job, operating personal can obtain the receipt of automatic printing.System can automatically adding sand facies pass data upload to settle accounts later.
The fixing upper sand system of locomotive provided by the invention, on delivery pipe, air pressurizing unit is equipped with in the position of approximately every 18m.Braking sand, by the mode of supercharging air, obtains pneumatic from the gap of sand grains, thus ensures stable and course of conveying slowly.
The fixing upper sand system of locomotive provided by the invention, adopts two-stage transport model.First-level transport refers to from storage sand storehouse 1 to the conveying added sand station.Delivery system at the corresponding levels uses the principle of slowly conveying.By the mode of pressure-feeding apparatus braking sand is transported to from Sha Cang and adds sand station and apply.Two-stage conveying, namely promote to carry (from adding sand station to locomotive sand box) the process promoting conveying, sand is moved by the mode continuing flowing in delivery pipe.
The fixing upper sand system of locomotive provided by the invention, it has larger flexibility when designing.System can according to reorganizing and outfit field, go out to put in storage the actual locomotive sand situation of line, inspection and repair shop or overhaul shop and types of locomotive, sandbox volume and position, frequency of utilization, operating personal number and permissible working time and require in conjunction with civil engineering and existing storage sand room, storage sand storehouse place, design and be optimized, proposing comparatively reasonably fixing upper sand systems solutions.Locomotive provided by the invention fixes sand system and traditional sand mode that adds, and to contrast its principal feature as follows:
(1) work efficiency is high: when operating personnel and work capacity identical, it is 5 to 6 times that manually add sand efficiency that native system adds sand efficiency.More than reorganizing and outfit 60 days, reorganize and outfit field, manually adding sand as used, at least needing outfit 3 class of 9 to 12 people to work simultaneously.If add sand with this pneumatic fixing sand delivering system, then only need be equipped with 3 people divides 3 classes, and what per tour 1 operating personal just can complete several sandboxes at short notice simultaneously adds sand task.Operating personnel's labour intensity significantly reduces, operating efficiency and comfort level high.
(2) operating environment is excellent: Operation system setting dust removal filter; add sand muzzle and store up sand storehouse note sand material mouth and all have dust collector and pipeline; fundamentally solve and add sand operation dust problem; achieve dustless equalization; ensure that the physical and mental health of operating personal and the protection of peripheral rails environment, sand material is without excessive waste.
(3) safety factor is high: when fixing upper sand system can avoid and manually add sand, the scratching problem of go-cart and locomotive; Meet the sandbox mouth locomotive of eminence position, falling when can avoid ascend operation; And ensure that personnel and the safety distance contacting electrical network.
(4) reliability is high: because delivery system adopts sediment transport speed <1m/s slowly, pipeline has longer service life, wear-resistant, without the need to special processing process, just can reach actual operating needs.Pipeline crook meets the requirements of radius, and intermittent installs air pressurizing unit and air knife additional, makes sand smooth conveying in the duct, can add sandbox without entering with blocking.Special add the design of sand rifle and can detect that whether add sandbox fills sand, quits work automatically.
(5) do not limit by vehicle: each sand station that adds can be equipped with maximum 4 and adds sandpipe, and the length adding sand flexible pipe can reach 6m, even if parked vehicles model is different, sandbox position is not fixed, all can meet actual user demand.
The foregoing is 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 (7)
1. the fixing upper sand system of locomotive, is characterized in that, comprise storage sand storehouse, dust removal by filtration system, pneumatic conveyor system, comprehensive pipeline system and at least one add sand station;
Described dust removal by filtration system is installed on the side in described storage sand storehouse, and is connected with the top in described storage sand storehouse;
Described pneumatic conveyor system is installed on the below in described storage sand storehouse, and is connected with the bottom in described storage sand storehouse, and both junctions are provided with self-closing valve;
Described dust removal by filtration system and described pneumatic conveyor system add sand station described in being all connected by described comprehensive pipeline system, add sand station described in each and be respectively equipped with automatic air return system and automatic gauge and cost accounting system, described in add sand station and be installed on ground, house frame or inspection platform;
The fixing upper sand system of described locomotive also comprises air-compressor set and electric switch and control system, and described air-compressor set is arranged near described storage sand storehouse.
2. the fixing upper sand system of locomotive as claimed in claim 1, is characterized in that: it is inner or outside that described storage sand storehouse is installed on storage sand room, and described storage sand storehouse has a screening plant and support frame, offers at the lower position in described storage sand storehouse the door that can lock.
3. the fixing upper sand system of locomotive as claimed in claim 1 or 2, is characterized in that: the lower end of described dust removal by filtration system is provided with the dust tank for collecting dust.
4. the fixing upper sand system of locomotive as claimed in claim 1, is characterized in that: described comprehensive pipeline system is processed into by carbon steel.
5. the fixing upper sand system of locomotive as claimed in claim 4, is characterized in that: on the pipeline of described comprehensive pipeline system, intermittent is equipped with air pressurizing unit.
6. the fixing upper sand system of locomotive as claimed in claim 1, is characterized in that: described in add sand station and have and add sand rifle, import head, sand station cylinder, connection pipe and air pressure valve.
7. the fixing upper sand system of the locomotive as described in claim 1 or 6, it is characterized in that: described electric switch and control system comprise switch cubicle and control housing, the Qianmen of described switch cubicle is furnished with simulated chart, described control housing inside is provided with long distance service system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510071357.3A CN104692146A (en) | 2015-02-11 | 2015-02-11 | Fixed sand feeding system of locomotive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510071357.3A CN104692146A (en) | 2015-02-11 | 2015-02-11 | Fixed sand feeding system of locomotive |
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| CN104692146A true CN104692146A (en) | 2015-06-10 |
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| CN201510071357.3A Pending CN104692146A (en) | 2015-02-11 | 2015-02-11 | Fixed sand feeding system of locomotive |
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| CN105366369A (en) * | 2015-10-21 | 2016-03-02 | 中铁第四勘察设计院集团有限公司 | Combined changeover valve, sand feeding device and CRH motor train unit automatic sand feeding trolley |
| CN108643879A (en) * | 2018-05-08 | 2018-10-12 | 中国石油大学(华东) | A kind of underwater desanding device |
| CN112537345A (en) * | 2020-12-09 | 2021-03-23 | 中铁第四勘察设计院集团有限公司 | Cooperative operation intelligent joint control system and method for power-concentrated motor train unit |
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| CN108643879B (en) * | 2018-05-08 | 2020-06-02 | 中国石油大学(华东) | Underwater sand removing device |
| CN112537345A (en) * | 2020-12-09 | 2021-03-23 | 中铁第四勘察设计院集团有限公司 | Cooperative operation intelligent joint control system and method for power-concentrated motor train unit |
| CN112537345B (en) * | 2020-12-09 | 2023-02-28 | 中铁第四勘察设计院集团有限公司 | Cooperative operation intelligent joint control system and method for power-concentrated motor train unit |
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