CN112523989B - Compact diesel engine pump - Google Patents
Compact diesel engine pump Download PDFInfo
- Publication number
- CN112523989B CN112523989B CN202011264240.4A CN202011264240A CN112523989B CN 112523989 B CN112523989 B CN 112523989B CN 202011264240 A CN202011264240 A CN 202011264240A CN 112523989 B CN112523989 B CN 112523989B
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- Prior art keywords
- water
- cavity
- diesel engine
- communicated
- air
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/06—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/20—Filtering
Abstract
The application relates to a compact diesel engine pump, which comprises a diesel engine, a pump body, a dredger and a regulator. The diesel engine has an exhaust pipe. The pump body is provided with a water inlet. The dredging device is provided with a communicating port, an air port and a water port; two communication ports are arranged and are used for communicating the water pipe; the air port is communicated with an exhaust pipe of the diesel engine; the water opening is communicated with the water inlet of the pump body. The regulator is connected in the dredge to adjust two a intercommunication gas opening of intercommunication mouth, another the intercommunication mouth intercommunication water opening. When water is taken from the river channel, the other ends of the two water pipes are arranged in the river channel, one water pipe is used for pumping water, the other water pipe is used for exhausting, and when the water pipe for pumping water is blocked, the communication positions of the two water pipes are changed so as to utilize the exhaust pressure of the diesel engine to dredge the blocked water pipe.
Description
Technical Field
The application relates to the field of diesel engine pumps, in particular to a compact diesel engine pump.
Background
The diesel engine pump is a mechanical and electrical integration device which is directly driven by a diesel engine and can be started in a short time and realize water supply. Briefly, a diesel engine pump is a water pump powered by a diesel engine.
When being used for mountain forest to put out a fire with diesel engine pump, generally follow water intake in river course, the ditch, in the water inlet department intercommunication water pipe of diesel engine pump promptly, the river course is placed to the other end of water pipe, the diesel engine starts, realizes the water intaking.
In view of the above-mentioned related technologies, the inventor believes that when water is taken from a river channel, in order to prevent sundries such as aquatic plants from entering a water pipe and a diesel engine pump, a filter is generally communicated with an end portion of the water pipe, but when the filter blocks the sundries, the sundries are easily attached to the surface of the filter, so that the sundries block the filter, and the diesel engine pump cannot normally work.
Disclosure of Invention
Normally follow the river course for the diesel engine pump and get water, this application provides a compact diesel engine pump.
The application provides a compact diesel engine pump adopts following technical scheme:
the utility model provides a compact diesel engine pump, includes the diesel engine and the pump body, the diesel engine has the blast pipe, the pump body has the water inlet, still includes:
the dredger is provided with two communicating ports, an air port and a water port, the two communicating ports are used for communicating with a water pipe, the air port is communicated with an exhaust pipe of the diesel engine, and the water port is communicated with a water inlet of the pump body; and
and the regulator is connected with the dredger and regulates one of the communicating ports to be communicated with the air port and the other communicating port to be communicated with the water port.
By adopting the technical scheme, the other ends of the water pipes connected with the two communication ports are placed in the river channel, and the regulator enables one water pipe to be communicated with the water inlet of the pump body and used for pumping water; the other water pipe is communicated with an exhaust pipe of the diesel engine and used for exhausting air, and a diesel engine pump operates to take water from a river channel;
if the water pipe for pumping water is blocked by sundries, the water pipe originally used for exhausting air is communicated with the water inlet of the pump body under the control of the regulator so as to pump water; the blocked water pipe is communicated with an exhaust pipe of the diesel engine, and the blocked water pipe is dredged by utilizing the exhaust pressure of the diesel engine; the diesel engine pump can stably operate to take water from the river channel.
Optionally, a cavity is arranged in the dredger, two air through holes are arranged, and the communication port, the air through hole and the water through hole are all communicated with the cavity;
the regulator includes:
two adjusting plates are arranged side by side and are arranged in the cavity of the dredger in a sliding manner;
the two adjusting plates divide the cavity of the dredger into an air cavity, a water cavity and an air cavity which are mutually independent;
two the gas opening is located two regulating plates one side that backs on the back respectively, the water opening is located between two regulating plates, two the intercommunication mouth is located the both sides of water opening along regulating plate slip direction respectively, just interval between intercommunication mouth and the water opening and the interval between intercommunication mouth and the gas opening all are greater than the thickness of regulating plate.
Through adopting above-mentioned technical scheme, utilize the slip of two regulating plates, adjust the connected mode of each intercommunication mouth, gas port mouth and water port mouth, and then realize the water pipe of mediation jam.
Optionally, the regulator further comprises:
the connecting rod is arranged between the two adjusting plates and is parallel to the sliding direction of the adjusting plates, and the end part of the connecting rod is fixedly connected with the adjusting plates;
the center distance of the two communication ports along the sliding direction of the adjusting plates is not smaller than the center distance of the two adjusting plates.
Through adopting above-mentioned technical scheme, during the regulation, two regulating plates synchronous motion to the realization is only located between two regulating plates for a intercommunication mouth at most, in order to realize the water inlet of a intercommunication mouth intercommunication pump body, the blast pipe of another intercommunication mouth intercommunication diesel engine.
Optionally, the diameter of the through opening is not greater than the thickness of the adjusting plate.
Through adopting above-mentioned technical scheme, when the regulating plate removed, avoid the opening to span air cavity, water cavity, avoid diesel engine exhaust high temperature waste gas to flow into in the pump body.
Optionally, the cavity includes two communicated cylindrical cavities, axes of the two cylindrical cavities are parallel or coincident, and inner diameters of the two cylindrical cavities are different;
one adjusting plate is coaxially and slidably embedded in a cylindrical cavity with a larger inner diameter, and the other adjusting plate is coaxially and slidably embedded in a cylindrical cavity with a smaller inner diameter;
one of the communication ports is communicated with the cylindrical cavity with larger inner diameter, and the other communication port is communicated with the cylindrical cavity with smaller inner diameter.
By adopting the technical scheme, when the diesel engine pump runs, the water cavity is filled with water with certain pressure, and then water pressure difference is generated on the two adjusting plates; meanwhile, the two air cavities are filled with waste gas with certain pressure, and air pressure difference is generated on the two adjusting plates; the water pressure difference and the air pressure difference are balanced with each other, so that the position of the adjusting plate is stable;
if the water pipe is blocked by impurities, the pump body continuously pumps water in the water cavity, the pressure in the water cavity is reduced, the pressure difference of the water is reduced, the pressure difference of the air pushes the two adjusting plates to move, the blocked water pipe is communicated with an exhaust pipe of the diesel engine, and the pressure in the air cavity is increased until the blocked water pipe is dredged; meanwhile, the water pipe for exhausting originally is communicated with the water inlet of the pump body, the pump body continues to take water from the river channel, and the pressure in the water cavity rises again;
after dredging, the pressure in the air cavity falls back, and the water pressure difference and the air pressure difference are balanced with each other, so that the position of the adjusting plate is stable.
Optionally, the regulator further comprises:
the elastic piece is arranged in the cylindrical cavity with the smaller inner diameter and is positioned in the air cavity;
the elastic piece stretches along the axis of the cylindrical cavity, one end of the elastic piece is connected with the adjusting plate in an abutting mode, and the other end of the elastic piece is connected with the inner wall of the air cavity in an abutting mode.
By adopting the technical scheme, when the diesel engine pump normally operates, the water pressure difference and the air pressure difference are balanced with each other, so that the position of the adjusting plate is stable;
if the water pipe is blocked by sundries, the pressure in the water cavity is reduced, and the water pressure difference is reduced, the air pressure difference overcomes the elasticity of the elastic piece to push the two adjusting plates to move;
after dredging, the water pressure difference and the air pressure difference restore to balance again, at the moment, the two adjusting plates reset under the elastic action of the elastic piece to prepare for next dredging.
Optionally, the two cylindrical cavities and the connecting rod are coaxially arranged.
Through adopting above-mentioned technical scheme for the atress of two regulating plates and connecting rod is reasonable, effectively guarantees the life of regulator.
Optionally, the axial length of the cylindrical cavity with the larger inner diameter is smaller than the length of the connecting rod.
Through adopting above-mentioned technical scheme, avoid the regulating plate to break away from the less cylinder chamber of internal diameter, effectively guarantee the normal work of regulator and dredge.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the other ends of the water pipes connected with the two communication ports are placed in the river channel, and the regulator enables one water pipe to be communicated with the water inlet of the pump body and used for pumping water; the other water pipe is communicated with an exhaust pipe of the diesel engine and used for exhausting air, and a diesel engine pump operates to take water from a river channel;
2. if the water pipe for pumping water is blocked by sundries, the water pipe originally used for exhausting air is communicated with the water inlet of the pump body under the control of the regulator so as to pump water; the blocked water pipe is communicated with an exhaust pipe of the diesel engine, and the blocked water pipe is dredged by utilizing the exhaust pressure of the diesel engine; the diesel engine pump can stably operate to take water from the river channel.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Fig. 2 is an internal structure schematic diagram of the dredger.
Description of reference numerals: 1. a diesel engine; 2. a pump body; 3. a water pipe; 4. a filter; 5. a dredger; 51. an air vent; 52. a communication port; 53. a water port; 54. an air cavity; 55. a water chamber; 6. a regulator; 61. an adjusting plate; 62. a connecting rod; 63. an elastic member.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
Referring to fig. 1, the embodiment of the present application discloses a compact diesel engine pump, which includes a diesel engine 1 and a pump body 2. The diesel engine 1 drives the pump body 2 to operate, and the pump body 2 is provided with a water inlet. If the pump body 1 adopts a vane pump, the diesel engine 1 drives vanes in the vane pump to rotate; if the pump body 1 adopts a screw pump, the diesel engine 1 drives the screw in the screw pump to rotate.
When the mountain forest extinguishes fire, water needs to be taken from a river channel, the water inlet of the pump body 2 is communicated with the water pipe 3, the other end of the water pipe 3 is communicated with the filter 4, and then the filter 4 is placed in the river channel, so that sundries such as aquatic plants are blocked by the filter 4. The filter 4 can be a filter cartridge, that is, filter holes are arranged on a cylinder body at intervals.
Referring to fig. 1 and 2, the diesel engine pump further includes a dredger 5 and a regulator 6.
The whole barrel-type that is of dredge 5 just inside is equipped with the cavity, and this cavity includes the unequal cylinder chamber of two internal diameters of coaxial setting.
The two axial ends of the dredger 5 are respectively provided with an air through hole 51, and the two air through holes 51 are respectively communicated with the two opposite ends of the two cylindrical cavities; and both air ports 51 are communicated to the exhaust pipe of the diesel engine 1 through a pipe.
The communication port 52, the water opening 53, and the communication port 52 are provided in this order in the axial direction on the side wall of the dredger 5. One communication port 52 is located on the side wall of the cylindrical chamber with the larger inner diameter, and the other communication port 52 is located on the side wall of the cylindrical chamber with the smaller inner diameter; the two communication ports 52 are both used for connecting the water pipe 3, and the other end of the water pipe 3 is communicated with the filter 4.
The water opening 53 may be located on the side wall of the cylindrical cavity with a larger inner diameter or on the side wall of the cylindrical cavity with a smaller inner diameter, and the water bucket opening communicates with the water inlet of the pump body 2.
The adjuster 6 includes an adjusting plate 61, a connecting rod 62, and an elastic member 63.
Two adjusting plates 61 are arranged side by side, one adjusting plate 61 is coaxially and slidably arranged in a cylindrical cavity with a larger inner diameter, the other adjusting plate 61 is coaxially and slidably arranged in a cylindrical cavity with a smaller inner diameter, and the water through hole 53 is always positioned between the two adjusting plates 61; and the peripheries of the two adjusting plates 61 and the inner walls of the two cylindrical cavities are in sliding seal, so that the cavity in the dredger 5 is divided into an air cavity 54, a water cavity 55 and an air cavity 54 which are independent of each other. Meanwhile, the thickness of the adjusting plate 61 is larger than the diameter of the communication port 52, and the distance between the bucket opening and the communication port 52 is larger than the thickness of the adjusting plate 61 along the axial direction of the adjusting plate 61.
The connecting rod 62 is coaxially connected between the two adjusting plates 61, and the center distance between the two adjusting plates 61 is equal to the center distance between the two communication ports 52; meanwhile, the length of the connecting rod 62 is also equal to the axial length of the cylindrical cavity with the larger inner diameter, so that the adjusting plate 61 with the small diameter is effectively prevented from being separated from the cylindrical cavity with the smaller inner diameter; there is a space between the outer periphery of the connecting rod 62 and the inner wall of the cavity in the dredger 5, and the space is used for water to pass through.
The elastic member 63 may be a spring and is coaxially embedded in the cylindrical cavity with the smaller inner diameter, and the elastic member 63 is located on the side of the adjusting plate 61 with the smaller diameter away from the adjusting plate 61 with the larger diameter, i.e. the elastic member 63 is also located in the air cavity 54. One end of the elastic member 63 is connected to the inner wall of the air chamber 54, and the other end is used for abutting against the small-diameter adjusting plate 61, that is, one end of the elastic member 63 may be fixedly connected with the adjusting plate 61 or may be unconnected with the adjusting plate 61.
The implementation principle of a compact diesel engine pump in the embodiment of the application is as follows: when the diesel engine pump takes water from the river channel, before taking water, the two communicating ports 52 are both communicated with the water pipe 3, the other end of the water pipe 3 is communicated with the filter 4, and the two filters 4 are both arranged in the river channel; meanwhile, in the dredger 5, under the action of the elastic part 63, the adjusting plate 61 with the large diameter is positioned on one side of one communication port 52, which is far away from the water through port 53, and the adjusting plate 61 with the small diameter is positioned on one side of the other communication port 52, which is far towards the water barrel opening, namely one water pipe 3 is communicated with the water inlet of the pump body 2, and the other water pipe 3 is communicated with the exhaust pipe of the diesel engine 1;
when water is taken, the diesel engine 1 is started, the pump body 2 is driven to operate, one water pipe 3 is used for pumping water and the other water pipe 3 is used for exhausting air through the dredging device 5 and the regulator 6, at the moment, the water cavity 55 is filled with water with certain pressure, and water pressure difference is generated on the two regulating plates 61; meanwhile, the two air cavities 54 are filled with waste gas with certain pressure, so that air pressure difference is generated on the two adjusting plates 61; the water pressure difference and the air pressure difference are balanced with each other, so that the position of the adjusting plate 61 is stable, and water taking is further completed;
in the process of taking water, sundries such as waterweeds and the like approach to the filter 4 for pumping water along with water flow and can cause the filter 4 to be blocked, and the other filter 4 for exhausting does not cause the blockage due to the exhaust pressure and the exhaust airflow of the diesel engine 1;
when the filter 4 for pumping water is blocked, the pump body 2 continuously pumps water in the water cavity 55, the pressure in the water cavity 55 is reduced, the water pressure difference is reduced, the air pressure difference pushes the two adjusting plates 61 to move by overcoming the elasticity of the elastic member 63, so that the blocked filter 4 is communicated with the exhaust pipe of the diesel engine 1, and the pressure in the air cavity 54 is increased until the blocked filter 4 is dredged; meanwhile, the filter 4 for exhausting originally is communicated with the water inlet of the pump body 2, the pump body 2 continues to take water from the river channel, and the pressure in the water cavity 55 rises again;
after dredging, the pressure in the air cavity 54 falls back, the water pressure difference and the air pressure difference are balanced, and at the moment, under the action of the elastic force of the elastic piece 63, the two adjusting plates 61 reset to prepare for next dredging;
in the process of taking water from the river channel for a long time, the process is automatically completed and is continuously repeated, so that stable water taking in the river channel is realized.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The utility model provides a compact diesel engine pump, includes diesel engine (1) and the pump body (2), diesel engine (1) has the blast pipe, the pump body (2) have the water inlet, its characterized in that still includes:
the dredger (5) is provided with two communicating ports (52), two air through ports (51) and two water through ports (53), the two communicating ports (52) are used for communicating with the water pipe (3), the air through ports (51) are communicated with an exhaust pipe of the diesel engine (1), and the water through ports (53) are communicated with a water inlet of the pump body (2); and
a regulator (6) which is connected to the dredger (5) and regulates one of the two communication ports (52) to be communicated with the air through port (51) and the other communication port (52) to be communicated with the water through port (53);
a cavity is formed in the dredger (5), two air ports (51) are formed, and the communication port (52), the air ports (51) and the water port (53) are communicated with the cavity;
the regulator (6) comprises:
two adjusting plates (61) are arranged side by side and are arranged in the cavity of the dredger (5) in a sliding manner;
the cavity of the dredger (5) is divided into an air cavity (54), a water cavity (55) and the air cavity (54) which are mutually independent by the two adjusting plates (61);
two gas opening (51) are located two regulating plates (61) one side of carrying on the back respectively, water opening (53) are located between two regulating plates (61), two intercommunication mouth (52) are located water opening (53) respectively and follow the both sides of regulating plate (61) slip direction, just interval between intercommunication mouth (52) and water opening (53) and interval between intercommunication mouth (52) and gas opening (51) all are greater than the thickness of regulating plate (61).
2. A compact diesel pump as in claim 1, characterized by: the regulator (6) further comprises:
the connecting rod (62) is arranged between the two adjusting plates (61) and is parallel to the sliding direction of the adjusting plates (61), and the end parts of the connecting rod (62) are fixedly connected with the adjusting plates (61);
the center distance of the two communication ports (52) along the sliding direction of the adjusting plate (61) is not less than the center distance of the two adjusting plates (61).
3. A compact diesel pump as in claim 2, characterized in that: the diameter of the communication opening (52) is not larger than the thickness of the adjusting plate (61).
4. A compact diesel pump as in claim 2, characterized in that: the hollow cavity comprises two communicated cylindrical cavities, the axes of the two cylindrical cavities are parallel or overlapped, and the inner diameters of the two cylindrical cavities are different;
one adjusting plate (61) is coaxially and slidably embedded in a cylindrical cavity with a larger inner diameter, and the other adjusting plate (61) is coaxially and slidably embedded in a cylindrical cavity with a smaller inner diameter;
one of the communication ports (52) is communicated with the cylindrical cavity with the larger inner diameter, and the other communication port (52) is communicated with the cylindrical cavity with the smaller inner diameter.
5. A compact diesel pump as in claim 4, characterized in that: the regulator (6) further comprises:
the elastic piece (63) is arranged in the cylindrical cavity with the smaller inner diameter and is positioned in the air cavity (54);
the elastic piece (63) stretches along the axis of the cylindrical cavity, one end of the elastic piece (63) is abutted against the adjusting plate (61), and the other end of the elastic piece is abutted against the inner wall of the air cavity (54).
6. A compact diesel pump as in claim 4, characterized in that: the two cylindrical cavities and the connecting rod (62) are coaxially arranged.
7. A compact diesel pump as in claim 4, characterized in that: the axial length of the cylindrical cavity with the larger inner diameter is smaller than the length of the connecting rod (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011264240.4A CN112523989B (en) | 2020-11-12 | 2020-11-12 | Compact diesel engine pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011264240.4A CN112523989B (en) | 2020-11-12 | 2020-11-12 | Compact diesel engine pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112523989A CN112523989A (en) | 2021-03-19 |
| CN112523989B true CN112523989B (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011264240.4A Active CN112523989B (en) | 2020-11-12 | 2020-11-12 | Compact diesel engine pump |
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| CN (1) | CN112523989B (en) |
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| CN204219898U (en) * | 2014-09-30 | 2015-03-25 | 宝钢不锈钢有限公司 | A kind of bitubular oil strainer for self-cleaning |
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| CN205518308U (en) * | 2016-04-15 | 2016-08-31 | 陈华 | Pneumatic back flush air water atomizing nozzle of binary channels filter type |
| CN207349110U (en) * | 2017-09-08 | 2018-05-11 | 福建三川机电有限公司 | A kind of multifunctional water pump being not easy to plug |
| CN111335946A (en) * | 2020-03-30 | 2020-06-26 | 中国十九冶集团有限公司 | Tunnel drainage system and drainage method |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08296576A (en) * | 1995-04-25 | 1996-11-12 | Hitachi Ltd | Suction filter |
| CN101311587A (en) * | 2007-12-29 | 2008-11-26 | 北京谊安医疗系统股份有限公司 | Pneumatic control proportioning time-delay change valve |
| CN102207206A (en) * | 2010-03-31 | 2011-10-05 | 浙江三花制冷集团有限公司 | Electromagnetic reversing valve |
| CN101832303A (en) * | 2010-05-12 | 2010-09-15 | 河北华北石油荣盛机械制造有限公司 | Piston-type deep sea water pressure compensation energy accumulator |
| CN101935112A (en) * | 2010-09-02 | 2011-01-05 | 青岛科创新能源科技有限公司 | Cold and heat source revolution type dual-prevention device for sewage or surface water and system thereof |
| CN102068847A (en) * | 2010-12-24 | 2011-05-25 | 江苏大学 | Jet self-cleaning screen filter |
| CN202215792U (en) * | 2011-08-31 | 2012-05-09 | 浙江盾安禾田金属有限公司 | Slide valve type self-operated three-way change valve |
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| CN111335946A (en) * | 2020-03-30 | 2020-06-26 | 中国十九冶集团有限公司 | Tunnel drainage system and drainage method |
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| Publication number | Publication date |
|---|---|
| CN112523989A (en) | 2021-03-19 |
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Denomination of invention: A compact diesel engine pump Effective date of registration: 20230825 Granted publication date: 20221213 Pledgee: Bank of Ningbo Co.,Ltd. Taizhou Branch Pledgor: ZHEJIANG DONGHANG FIRE PUMP Co.,Ltd. Registration number: Y2023330001846 |