CN212053089U - Intelligent vacuum sewage discharge system for railway - Google Patents
Intelligent vacuum sewage discharge system for railway Download PDFInfo
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- CN212053089U CN212053089U CN201921445519.5U CN201921445519U CN212053089U CN 212053089 U CN212053089 U CN 212053089U CN 201921445519 U CN201921445519 U CN 201921445519U CN 212053089 U CN212053089 U CN 212053089U
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Abstract
The utility model discloses a railway intelligent vacuum sewage discharging system in the technical field of sewage discharging, which comprises a vacuum sewage discharging subsystem, a cloud subsystem and an attached control box, wherein the vacuum sewage discharging subsystem comprises a vacuum center, a sewage discharging pipeline and a sewage box, the cloud subsystem comprises a mobile terminal, a router and a cloud server, the attached control box comprises a power module, a PLC control module, an alarm device, an input module and an output module, a negative pressure valve is processed by the PLC control module according to the liquid level value in the sewage box and the vacuum pump according to the vacuum value and the liquid level value of a vacuum tank, the automatic control, the automatic shutdown and the alarm can be realized for overrun or fault, the unattended operation can be realized, the remote communication with the vacuum sewage discharging subsystem is realized through the cloud server and the mobile terminal, the working state information and the fault information of the vacuum pump in the vacuum sewage discharging subsystem are monitored in real time, the sewage discharging pump, the deodorization pump, the electromagnetic blow-down valve and the negative pressure valve are monitored, timely processing, prolonging the service life of the equipment and improving the management efficiency.
Description
Technical Field
The utility model relates to a blowdown technical field specifically is a railway intelligence vacuum system of unloading dirt.
Background
The present sewage discharging host machine and the sewage discharging unit for the railway vacuum sewage discharging system are separated, the sewage discharging host machine is simultaneously connected with a plurality of sewage sucking units, the number of the sewage sucking units matched with the existing sewage discharging host machine is large, the management is not easy, the liquid level of the vacuum tank is controlled by manually observing the glass tube on site, because the sewage of the train contains a lot of hard garbage and sundries, the pipeline is extremely easy to block, the sewage discharging pump can not be started in the running process, the vacuum pump is always vacuumized, the sewage of the vacuum tank is easily filled, thereby the sewage is pumped into the vacuum pump through the vacuum pipeline, the damage of the vacuum pump is caused, the normal sewage discharging can not be realized, the vacuum pressure can not be maintained, and the like.
At present, field users, equipment maintainers and actual managers can not monitor in real time at the same time, once equipment fails, operators can not find the equipment in advance, and maintainers can not process the equipment in time, so that the dirt discharge of a train can be influenced, and the travelling of the train can be influenced.
Based on this, the utility model designs a railway intelligence vacuum system of unloading dirt to solve the above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a railway intelligence vacuum system of unloading to on-the-spot user, the plant maintenance person who proposes in solving above-mentioned background art and actual manager can not real time monitoring simultaneously, in case equipment breaks down, operating personnel can not discover in advance, and maintainer can not in time handle, will influence the train and unload dirty, probably influences the problem that the train marchs.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a railway intelligence vacuum system of unloading dirt, includes that the vacuum unloads dirty subsystem, high in the clouds subsystem and attached control box, the vacuum unloads dirty subsystem by the vacuum center, unload dirty pipeline and dirt case and constitute, the high in the clouds subsystem comprises mobile terminal, router and cloud ware, attached control box comprises power module, PLC control module, alarm device, input module and output module.
Preferably, vacuum center includes vacuum pump, vacuum tank, dredge pump and deodorization pump, the vacuum tank is connected with the vacuum pump through vacuum pipeline, the vacuum tank connects gradually mixer and dredge pump through blowdown vacuum pipeline, the vacuum pump is connected with the deodorization pump through airtight pipeline, vacuum pressure gauge, vacuum pressure sensor and electromagnetism atmospheric valve on the vacuum tank, all install the liquid level sensor in filth case and the vacuum tank.
Preferably, the pipeline of unloading dirt is responsible for with unloading dirt including the branch pipe of unloading dirt, the one end of the branch pipe of unloading dirt connects in a plurality of filth casees on the train, the other end of the branch pipe of unloading dirt connect in the main pipe of unloading dirt, the branch pipe of unloading dirt is responsible for through unloading dirt and is connected with the vacuum tank, the branch pipe of unloading dirt is last to be installed by negative pressure valve and maintenance ball valve.
Preferably, in the attached control box, closed air switch, power module work supplies power, vacuum pump, dredge pump, deodorization pump, vacuum pressure gauge, vacuum pressure sensor, liquid level sensor, electromagnetism blow-down valve and negative pressure valve all connect in input module through integrated signal line, and PLC control module acquires input module in real time the operating condition information and the fault information of vacuum pump, dredge pump, deodorization pump, vacuum pressure gauge, vacuum pressure sensor, liquid level sensor, electromagnetism blow-down valve and negative pressure valve carry out centralized processing, if break down, control alarm device reports to the police to send to the high in the clouds subsystem through output module.
Preferably, in the cloud subsystem, the output module is connected to the router through the network cable and is connected to the cloud server through the router, the cloud server is connected with the mobile terminal, remote communication with an attached control box is achieved, and the working state information and the fault information of the vacuum pump, the sewage pump, the deodorization pump, the electromagnetic blow-down valve and the negative pressure valve can be displayed through the mobile terminal.
Preferably, the mobile terminal comprises a display interface, the display interface is used for displaying state indicator lamps and operation parameters of the vacuum pump, the sewage pump, the deodorization pump, the electromagnetic blow-down valve and the negative pressure valve, the states of the indicator lamps and the operation parameter display are collected by an attached control box, the on-off states of the vacuum pump, the sewage pump, the deodorization pump, the electromagnetic blow-down valve and the negative pressure valve are uploaded to a cloud server, and the cloud server sends information to the mobile terminal through the internet.
Preferably, be located level sensor in the filth case is fixed in the settlement position of filth case for detect the liquid level value of filth case, receive through input module the liquid level value of filth case is handled by PLC control module, and compares in predetermined liquid level value, if the liquid level value of filth case is greater than predetermined liquid level value, then control the negative pressure valve is opened, and the filth that is located the filth incasement flows to the vacuum tank through dirt discharging pipe, if the liquid level value of filth case is less than predetermined liquid level value, then control the negative pressure valve is closed, stops the suction sewage in the filth case.
Preferably, be located liquid level sensor in the vacuum tank is fixed in the settlement position of vacuum tank for detect the liquid level value of vacuum tank, receive through input module the liquid level value of vacuum tank is handled by PLC control module, and compares with preset liquid level value, if the liquid level value of vacuum tank is greater than preset liquid level value, then control the dredge pump is opened, and the filth that is located the vacuum tank passes through blowdown vacuum pipe and discharges, if the liquid level value of vacuum tank is less than preset liquid level value, then control the dredge pump is closed, stops the suction sewage in the vacuum tank.
Preferably, the vacuum pressure sensor collects the vacuum degree of the vacuum tank in real time, the input module receives the vacuum degree of the vacuum tank, the PLC control module processes the vacuum degree and compares the vacuum degree with a preset upper limit value and a preset lower limit value, and if the vacuum degree of the vacuum tank is greater than the upper limit value, the vacuum pump is controlled to be started to suck out air in the vacuum tank; if the vacuum degree of the vacuum tank is smaller than the lower limit value and the sewage pump is in a closed state, controlling the vacuum pump to be closed and stopping sucking air; and if the vacuum degree of the vacuum tank is smaller than the lower limit value and the sewage pump is in an opening state, controlling the electromagnetic emptying valve to be opened.
Preferably, the input module adopts a 485 interface, the output module adopts a network cable interface, various devices needing serial port communication are connected to the corresponding 485 interface through an integrated signal line, and after centralized processing of the PLC control module, the integrated signal line is connected with the cloud subsystem through the network cable interface to transmit the working state information fault information and the control command of the various devices.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the negative pressure valve in the vacuum sewage discharge subsystem is used for processing through the PLC control module according to the level value in the sewage tank and the vacuum value and the level value of the vacuum tank, and the automatic control is realized, so that the automatic shutdown and the alarm can be realized when the vacuum pump exceeds the limit or fails, and the unattended operation can be realized;
(2) through cloud ware and mobile terminal, realize the remote communication with vacuum dirt discharging subsystem, vacuum pump among the real-time supervision vacuum dirt discharging subsystem, the dredge pump, the deodorization pump, the operating condition information and the fault information of electromagnetism atmospheric valve and negative pressure valve, the user equipment, the maintenance personal, the equipment manufacturer, higher level's administrative department can receive information the very first time, discover the trouble in the system operation, hidden danger, be convenient for in time handle, make things convenient for the operation record statistics, solve responsibility problem and management problem, through the analysis to operating parameter, can judge equipment maintenance time in advance, prejudge the trouble probability in advance, remind managers, thereby can improve equipment life, and the management efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the vacuum sewage disposal subsystem of the present invention;
FIG. 3 is a schematic view of the structure of the vacuum tank of the present invention;
FIG. 4 is a schematic view of the structure of the attached control box of the present invention;
fig. 5 is a schematic view of the interface of the mobile terminal of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a vacuum sewage discharge subsystem; 2. a cloud subsystem; 3. an attached control box; 4. a router; 5. a cloud server; 6. a mobile terminal; 7. a power supply module; 8. a PLC control module; 9. an alarm device; 10. an input module; 11. an output module; 12. a dirt box; 121. a liquid level sensor; 13. a sewage discharge branch pipe; 131. a negative pressure valve; 132. overhauling the ball valve; 14. a main sewage discharge pipe; 15. a vacuum tank; 151. a vacuum pressure gauge; 152. a vacuum pressure sensor; 153. an electromagnetic blow-down valve; 16. a vacuum pump; 17. a vacuum line; 18. a blender; 19. a sewage pump; 20. a blowdown vacuum pipe; 21. a deodorizing pump; 22. and (5) sealing the pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a railway intelligence vacuum system of unloading dirt, includes that vacuum unloads dirty subsystem 1, high in the clouds subsystem 2 and attached control box 3, vacuum unloads dirty subsystem 1 by the vacuum center, unload dirty pipeline and filth case 12 and constitute, high in the clouds subsystem 2 comprises mobile terminal 6, router 4 and cloud ware 5, attached control box 3 comprises power module 7, PLC control module 8, alarm device 9, input module 10 and output module 11.
Wherein, the vacuum center comprises a vacuum pump 16, a vacuum tank 15, a sewage pump 19 and a deodorizing pump 21, the vacuum tank 15 is connected with the vacuum pump 16 through a vacuum pipeline 17, the vacuum tank 15 is sequentially connected with a stirrer 18 and the sewage pump 19 through a sewage vacuum pipeline 20, the vacuum pump 16 is connected with the deodorizing pump 21 through a closed pipeline 22, a vacuum pressure gauge 151, a vacuum pressure sensor 152 and an electromagnetic blow-down valve 153 are arranged on the vacuum tank 15, liquid level sensors are respectively arranged in the sewage tank 12 and the vacuum tank 15, the vacuum pipeline 17, the sewage vacuum pipeline 20 and the closed pipeline 22 are completely closed, have no peculiar smell, blockage, gas leakage, oil leakage, water leakage and sewage leakage, meet the requirements of the advanced technology of environmental protection and energy-saving equipment, and suck the sewage in the sewage tank 12 into the vacuum tank 15 under the action of the vacuum pump 16 and pass through the stirrer 18 and the sewage pump 19, the solid and flexible impurities in the sewage discharge vacuum pipeline 20 are thoroughly crushed, the normal operation of the sewage discharge pump 19 is ensured, the service life is greatly prolonged, the odor in the pipeline is effectively discharged through the deodorization pump 21, and the complete suction and removal of the floaters in the sewage tank 12 are facilitated.
Wherein, the pipeline of unloading dirt is responsible for 14 including unloading dirty branch pipe 13 and unloading dirt, the termination of unloading dirty branch pipe 13 is in a plurality of filth boxes 12 on the train, the other end of unloading dirty branch pipe 13 connect in the unloading dirty main pipe 14, the branch pipe 13 of unloading dirt is responsible for 14 through unloading dirt and is connected with vacuum tank 15, the installation is by negative pressure valve 131 and maintenance ball valve 132 on the branch pipe 13 of unloading dirt, through being equipped with negative pressure valve 131 and maintenance ball valve 132 on every branch pipe 13 of unloading dirt, when the emergence trouble needs to be overhauld or be changed when unloading dirt on the branch pipe 13, can close corresponding maintenance ball valve 132 on the branch pipe 13 of unloading dirt, overhauls or changes negative pressure valve 131.
Wherein, in the attached control box 3, the air switch is closed, the power module 7 works to supply power, the vacuum pump 16, the sewage pump 19, the deodorization pump 21, the vacuum pressure gauge 151, the vacuum pressure sensor 152, the liquid level sensor, the electromagnetic blow-down valve 153 and the negative pressure valve 131 are all connected to the input module 10 through integrated signal lines, the PLC control module 8 acquires the working state information and the fault information of the vacuum pump 16, the sewage pump 19, the deodorization pump 21, the vacuum pressure gauge 151, the vacuum pressure sensor 152, the liquid level sensor, the electromagnetic blow-down valve 153 and the negative pressure valve 131 collected by the input module 10 in real time to perform centralized processing, if a fault occurs, the alarm device 9 is controlled to alarm, the alarm device 9 alarms in the modes of sound and light, telephone dialing, short message, app pushing and the like and sends the alarm to the cloud subsystem 2 through the output module 11, the PLC control module 8 performs state automatic detection on the whole vacuum sewage discharge subsystem 1, and add trouble alarm function through alarm device 9, in the high in the clouds subsystem 2, output module 11 is connected to on the router 4 through the net twine to in passing through router 4 and connecing cloud server 5, high in the clouds server links to each other with mobile terminal 6, realizes with attached control box 3's remote communication, can show through mobile terminal 6 vacuum pump 16, dredge pump 19, deodorization pump 21, electromagnetism atmospheric valve 153 and negative pressure valve 131's operating condition information and fault information.
The mobile terminal 6 comprises a display interface, the display interface is used for displaying status indicator lamps and operation parameters of the vacuum pump 16, the sewage pump 19, the deodorization pump 21, the electromagnetic blow-down valve 153 and the negative pressure valve 131, the status indicator lamps and the operation parameters are displayed and collected by the attached control box 3, the on-off statuses of the vacuum pump 16, the sewage pump 19, the deodorization pump 21, the electromagnetic blow-down valve 153 and the negative pressure valve 131 are uploaded to the cloud server 5, and the cloud server 5 sends information to the mobile terminal 6 through the internet.
The working state information and the fault information of the vacuum pump 16, the sewage pump 19, the deodorization pump 21, the electromagnetic blow-down valve 153 and the negative pressure valve 131 in the vacuum sewage discharge subsystem 1 can be monitored in real time through a display interface of the mobile terminal 6, and users, maintenance personnel, equipment manufacturers and higher management departments can receive information in the first time, find faults and hidden dangers in the operation of the system, are convenient to process in time, operate, record and count conveniently, solve the problems of responsibility and management, can judge the equipment maintenance time in advance through the analysis of operation parameters, pre-judge the fault occurrence probability in advance, and remind managers.
Wherein, be located level sensor 121 in filth case 12 is fixed in the settlement position of filth case 12 for detect the liquid level value of filth case 12, receive through input module 10 the liquid level value of filth case 12 is handled by PLC control module 8, and compares in predetermined liquid level value, if the liquid level value of filth case 12 is greater than predetermined liquid level value, then control negative pressure valve 131 is opened, and the filth that is located filth case 12 flows to vacuum tank 15 through the pipeline of unloading, if the liquid level value of filth case 12 is less than predetermined liquid level value, then control negative pressure valve 131 closes, stops to aspirate sewage in the filth case 12.
Wherein, be located liquid level sensor in the vacuum tank 15 is fixed in the settlement position of vacuum tank 15 for detect the liquid level value of vacuum tank 15, receive through input module 10 the liquid level value of vacuum tank 15 is handled by PLC control module 8, and compares with preset liquid level value, if the liquid level value of vacuum tank 15 is greater than preset liquid level value, then control dredge pump 19 is opened, and the filth that is located vacuum tank 15 passes through blowdown vacuum pipe 20 and discharges, if the liquid level value of vacuum tank 15 is less than preset liquid level value, then control dredge pump 19 closes, stops the suction sewage in the vacuum tank 15.
The vacuum pressure sensor 152 collects the vacuum degree of the vacuum tank 15 in real time, receives the vacuum degree of the vacuum tank 15 through the input module 10, processes the vacuum degree by the PLC control module 8, compares the vacuum degree with a preset upper limit value and a preset lower limit value, and controls the vacuum pump 16 to be started to suck out air in the vacuum tank 15 if the vacuum degree of the vacuum tank 15 is greater than the upper limit value; if the vacuum degree of the vacuum tank 15 is smaller than the lower limit value and the sewage pump 19 is in a closed state, controlling the vacuum pump 16 to be closed and stopping sucking air; and if the vacuum degree of the vacuum tank 15 is smaller than the lower limit value and the sewage pump 19 is in an open state, controlling the electromagnetic blow-down valve 153 to open.
The negative pressure valve 131 processes through the PLC control module 8 according to the liquid level value in the dirt box 12 and the vacuum pump 16 according to the vacuum value and the liquid level value of the vacuum tank 15, and the automatic control is realized.
The input module 10 adopts a 485 interface, the output module 11 adopts a network cable interface, various devices needing serial port communication are connected to the corresponding 485 interface through an integrated signal line, and after centralized processing of the PLC control module 8, the integrated signal line is connected with the cloud subsystem 2 through the network cable interface, so that the working state information and fault information of various devices and control commands are transmitted, and the 485 interface and the network cable interface are adopted, so that data transmission and processing are facilitated.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. The intelligent railway vacuum sewage discharge system is characterized by comprising a vacuum sewage discharge subsystem, a cloud subsystem and an attached control box, wherein the vacuum sewage discharge subsystem consists of a vacuum center, a sewage discharge pipeline and a sewage box;
the vacuum center comprises a vacuum pump, a vacuum tank, a sewage pump and a deodorization pump, the vacuum tank is connected with the vacuum pump through a vacuum pipeline, the vacuum tank is sequentially connected with a stirrer and the sewage pump through a sewage vacuum pipeline, the vacuum pump is connected with the deodorization pump through a closed pipeline, a vacuum pressure gauge, a vacuum pressure sensor and an electromagnetic blow-down valve are arranged on the vacuum tank, and liquid level sensors are respectively arranged in the sewage tank and the vacuum tank;
the sewage discharging pipeline comprises a sewage discharging branch pipe and a sewage discharging main pipe, one end of the sewage discharging branch pipe is connected with a plurality of sewage tanks on the train, the other end of the sewage discharging branch pipe is connected with the sewage discharging main pipe, the sewage discharging branch pipe is connected with the vacuum tank through the sewage discharging main pipe, and a negative pressure valve and a maintenance ball valve are mounted on the sewage discharging branch pipe;
in the attached control box, closed air switch, power module work supplies power, vacuum pump, dredge pump, deodorization pump, vacuum pressure gauge, vacuum pressure sensor, liquid level inductor, electromagnetism atmospheric valve and negative pressure valve all connect in input module through integrated signal line, and PLC control module acquires input module in real time the operating condition information and the fault information of vacuum pump, dredge pump, deodorization pump, vacuum pressure gauge, vacuum pressure sensor, liquid level inductor, electromagnetism atmospheric valve and negative pressure valve carry out centralized processing, if break down, control alarm device reports to the police to send to high in the clouds subsystem through output module.
2. The intelligent railway vacuum sewage discharge system of claim 1, wherein: in the cloud subsystem, the output module is connected to the router through a network cable and connected to the cloud server through the router, the cloud server is connected with the mobile terminal, remote communication with an attached control box is achieved, and the working state information and the fault information of the vacuum pump, the sewage pump, the deodorization pump, the electromagnetic emptying valve and the negative pressure valve can be displayed through the mobile terminal.
3. The intelligent railway vacuum sewage discharge system of claim 2, wherein: the mobile terminal comprises a display interface, the display interface is used for displaying state indicator lamps and operation parameters of the vacuum pump, the sewage pump, the deodorization pump, the electromagnetic blow-down valve and the negative pressure valve, the states of the indicator lamps and the operation parameter display are collected by an attached control box, the on-off states of the vacuum pump, the sewage pump, the deodorization pump, the electromagnetic blow-down valve and the negative pressure valve are uploaded to a cloud server, and the cloud server sends information to the mobile terminal through the internet.
4. The intelligent railway vacuum sewage discharge system of claim 3, wherein: be located level sensor in the filth case is fixed in the settlement position of filth case for detect the liquid level value of filth case, receive through input module the liquid level value of filth case is handled by PLC control module, and compares in predetermined liquid level value, if the liquid level value of filth case is greater than predetermined liquid level value, then control the negative pressure valve is opened, and the filth that is located the filth incasement flows to the vacuum tank through dirt discharging pipe, if the liquid level value of filth case is less than predetermined liquid level value, then control the negative pressure valve is closed, stops the suction sewage in the filth case.
5. The intelligent railway vacuum sewage discharge system of claim 4, wherein: be located liquid level sensor in the vacuum tank is fixed in the settlement position of vacuum tank for detect the liquid level value of vacuum tank, receive through input module the liquid level value of vacuum tank is handled by PLC control module, and compares with preset liquid level value, if the liquid level value of vacuum tank is greater than preset liquid level value, then control the dredge pump is opened, and the filth that is located the vacuum tank passes through blowdown vacuum pipe and discharges, if the liquid level value of vacuum tank is less than preset liquid level value, then control the dredge pump is closed, stops the suction sewage in the vacuum tank.
6. The intelligent railway vacuum sewage discharge system of claim 5, wherein: the vacuum pressure sensor collects the vacuum degree of the vacuum tank in real time, the input module receives the vacuum degree of the vacuum tank, the PLC control module processes the vacuum degree and compares the vacuum degree with a preset upper limit value and a preset lower limit value, and if the vacuum degree of the vacuum tank is greater than the upper limit value, a vacuum pump is controlled to be started to suck air in the vacuum tank; if the vacuum degree of the vacuum tank is smaller than the lower limit value and the sewage pump is in a closed state, controlling the vacuum pump to be closed and stopping sucking air; and if the vacuum degree of the vacuum tank is smaller than the lower limit value and the sewage pump is in an opening state, controlling the electromagnetic emptying valve to be opened.
7. The intelligent railway vacuum sewage discharge system of claim 1, wherein: the input module adopts a 485 interface, the output module adopts a network cable interface, various devices needing serial port communication are connected to the corresponding 485 interface through an integrated signal line, and after the devices are subjected to centralized processing by the PLC control module, the devices are connected with the cloud subsystem through the network cable interface, so that the working state information fault information and the control command of the various devices are transmitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921445519.5U CN212053089U (en) | 2019-09-02 | 2019-09-02 | Intelligent vacuum sewage discharge system for railway |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921445519.5U CN212053089U (en) | 2019-09-02 | 2019-09-02 | Intelligent vacuum sewage discharge system for railway |
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| CN212053089U true CN212053089U (en) | 2020-12-01 |
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| CN201921445519.5U Active CN212053089U (en) | 2019-09-02 | 2019-09-02 | Intelligent vacuum sewage discharge system for railway |
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