CN110966209A - Electric vacuum pump diversion system for pump - Google Patents
Electric vacuum pump diversion system for pump Download PDFInfo
- Publication number
- CN110966209A CN110966209A CN201911310502.3A CN201911310502A CN110966209A CN 110966209 A CN110966209 A CN 110966209A CN 201911310502 A CN201911310502 A CN 201911310502A CN 110966209 A CN110966209 A CN 110966209A
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- Prior art keywords
- vacuum pump
- pump
- valve
- guide rod
- sealing
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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
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
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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
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
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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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
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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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention relates to a water diversion system of an electric vacuum pump for a pump, which solves the problems that a piston water diversion pump is large in size and not universal in water inlet starting of the existing centrifugal pump, a matched valve of the vacuum pump is complex to operate, high in cost, easy to break down, small in use range and capable of influencing used equipment. The system comprises a vacuum pump, a motor, an air suction valve and a lubricating oil tank; the motor is connected with the vacuum pump to drive the vacuum pump to work, an outlet of the vacuum pump is connected with the suction valve through a pipeline, and the lubricating oil tank provides lubricating oil for the vacuum pump through a pipeline; the water diversion system with the electric vacuum pump has the advantages of being rapid in self-suction, reliable in operation, compact in structure, small in size, light in weight, easy to maintain, long in service life and the like.
Description
Technical Field
The invention relates to a water diversion system of a pump, in particular to a water diversion system of an electric vacuum pump for the pump.
Background
At present, centrifugal pumps generally need to be started by water inflow, the water inflow starting of most of centrifugal pumps is realized through a piston priming pump, however, the piston priming pump needs to obtain power from a gear box, the size of the piston priming pump is large, the piston priming pump needs to be specially designed, and the piston priming pump can be matched with the gear box for use, and therefore the mode is not universal.
The centrifugal pump can also realize water inlet starting by vacuumizing through a vacuum pump, and valves matched with the vacuum pump are generally electromagnetic valves, pneumatic valves or manual valves and the like. If the matched valve is an electromagnetic valve, the electromagnetic valve needs to be provided with a power supply, a sensor or a pressure switch, and a control system needs to be arranged when the electromagnetic valve is matched with the sensor, so that the mode is complex in operation, high in cost, long in control chain and easy to increase fault points; when the cooperation pressure switch uses, before water draws and comes to reach pressure switch's threshold value, can pour into the vacuum pump with the water that introduces, if the vacuum pump intake is many, can cause the vacuum pump rotating resistance too big, the condition of transshipping appears, and then produces the influence to motor life. If the matched valve is a pneumatic valve, the pneumatic valve needs to be provided with an air source and a pressure switch, and some use sites do not have the air source, so the applicability is not strong, and the use range is smaller. If the matched valve is a manual valve, the manual valve needs manual operation, and water can be poured into the vacuum pump when the operation action is too slow, so that the use of the vacuum pump is influenced, and therefore, the mode has high requirement on operators and causes waste of human resources.
Disclosure of Invention
The invention aims to solve the problems that a piston priming pump is large in size and not universal, a matched valve of a vacuum pump is complex to operate, high in cost, easy to break down, small in use range and capable of influencing using equipment in the water inlet starting of the conventional centrifugal pump, and provides an electric vacuum pump priming system for a pump.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a water diversion system of an electric vacuum pump for a pump comprises a vacuum pump, a motor, an air suction valve and a lubricating oil tank; the motor is connected with the vacuum pump to drive the vacuum pump to work, an outlet of the vacuum pump is connected with the suction valve through a pipeline, and the lubricating oil tank provides lubricating oil for the vacuum pump through a pipeline; the air suction valve comprises a base, a valve body, a valve cover, a sealing guide rod, an elastic valve seat, a rubber diaphragm, a wave spring, a diaphragm gasket and a spring support; the base is provided with an air inlet and a flow passage communicated with the air inlet; the valve body is arranged above the base and is of a cylinder structure, the side wall of the valve body is provided with an air outlet communicated with the sleeve cavity, a plurality of supporting plates are arranged in the sleeve cavity, and the sleeve bottom plate is provided with a through hole communicated with the sleeve cavity and the overflowing channel; the valve cover is arranged above the valve body to seal the cavity of the sleeve, and the end face of the valve cover is provided with an air hole; the sealing guide rod is arranged in the cavity of the valve body, the bottom end of the sealing guide rod extends out of the through hole of the bottom plate of the cylinder body and is matched with the elastic valve seat arranged between the base and the valve body to realize the blocking of fluid; the top end of the sealing guide rod extends out of the air hole of the valve cover; the rubber diaphragm, the diaphragm gasket, the wave spring and the spring support are sequentially sleeved on the sealing guide rod from top to bottom; the outer periphery of the rubber diaphragm is fixedly arranged between the valve body and the valve cover; the spring support is arranged above the support plate, and the support plate supports the spring support; the top end of the wave spring is limited through the diaphragm gasket, and the bottom end of the wave spring is limited through the spring support.
Furthermore, a check valve is arranged on a pipeline connecting the lubricating oil tank and the vacuum pump.
Further, the bottom of sealed guide arm sets up to sealed boss and the toper pole that is connected, sealed boss is located the cavity of base, the toper pole sets up in the through-hole of valve body barrel bottom plate.
Furthermore, the through hole of the bottom plate of the cylinder body is a tapered hole matched with the tapered rod and used for realizing the guiding and slow circulation of the fluid.
Furthermore, a thrust pad is sleeved on the sealing guide rod and used for limiting the downward displacement of the sealing guide rod.
Further, the bottom surface of the elastic valve seat is provided with an annular bulge and an annular groove; the annular protrusion is matched with the bottom end of the sealing guide rod to realize sealing, and the annular groove is matched with the upper end face of the base to realize sealing.
Further, be provided with annular installation arch on the outer periphery of rubber diaphragm, the top of valve body is provided with annular mounting groove, annular installation arch is installed in annular mounting groove for prevent that rubber diaphragm from droing.
Furthermore, an annular positioning groove is formed in the upper end face of the spring support, and the lower end of the wave spring is installed in the annular positioning groove.
Furthermore, the air inlets of the base are multiple and communicated with the overflowing channel.
Furthermore, a screw is fixedly arranged at the top end of the sealing guide rod, the screw is installed in an air hole of the valve cover, and a sealing gasket is arranged between the screw and the sealing guide rod.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the electric vacuum pump water diversion system for the pump has the advantages of being rapid in self-priming, reliable in operation, compact in structure, small in size, light in weight, easy to maintain, long in service life and the like.
2. The electric vacuum pump water diversion system for the pump does not need to be combined with the water pump during water diversion, so that the situation of dry grinding without water during water diversion of the water pump can be avoided, the water pump is effectively protected, and the service life of the water pump is prolonged.
3. The electric vacuum pump water diversion system for the pump can divert water before the water pump is jointed, thereby greatly reducing the water outlet time of the water pump and gaining precious time for quickly extinguishing fire.
4. The electric vacuum pump water diversion system for the pump provided by the invention can be reliably used only by supplying power without installing other power sources.
5. The air suction valve in the system has the advantages of simple structure, small volume, high reliability by realizing the starting and stopping of the vacuum pumping in a mechanical mode, convenient installation, low cost and wide application range, and can be used for all systems for pumping the vacuum by the centrifugal pump.
6. When the air suction valve in the system is matched with the vacuum pump for use, the vacuum pump can be protected, and water is prevented from being poured into the vacuum pump, so that the phenomenon that the vacuum pump has overlarge rotation resistance and cannot influence the use of the vacuum pump is avoided.
Drawings
FIG. 1 is a drawing of a water diversion system of an electric vacuum pump for a pump according to the present invention;
FIG. 2 is a cross-sectional view of an inhalation valve in the system of the present invention;
FIG. 3 is a schematic diagram of the structure of the suction valve base in the system of the present invention;
FIG. 4 is a schematic view of the structure of the suction valve body in the system of the present invention;
FIG. 5 is a schematic view of the sealing guide of the suction valve in the system of the present invention;
FIG. 6 is a schematic diagram of the structure of the resilient valve seat of the inhalation valve in the system of the present invention.
Reference numerals: 1-vacuum pump, 2-motor, 3-suction valve, 4-lubricating oil tank, 5-check valve, 31-base, 32-valve body, 33-valve cover, 34-sealing guide rod, 35-elastic valve seat, 36-rubber diaphragm, 37-wave spring, 38-diaphragm gasket, 39-spring support, 310-thrust pad, 311-screw, 312-sealing pad, 313-air inlet, 314-overflowing channel, 321-air outlet, 322-supporting plate, 323-through hole, 324-annular mounting groove, 331-air hole, 341-sealing boss, 342-conical rod, 351-annular protrusion, 352-annular groove, 361-annular mounting protrusion and 391-annular positioning groove.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 1, the electric vacuum pump priming system for a pump provided by the invention comprises a vacuum pump 1, a motor 2, an air suction valve 3 and a lubricating oil tank 4; motor 2 is connected with vacuum pump 1, drives its work, and vacuum pump 1's export is passed through the pipeline and is connected with suction valve 3, and suction valve 3 installs on the import pipeline of centrifugal pump or other places that need the evacuation, and lubricating-oil tank 4 provides lubricating oil for vacuum pump 1 through the pipeline, and is provided with check valve 5 on the pipeline that lubricating-oil tank 4 and vacuum pump 1 are connected. When the centrifugal pump is started, the vacuum pump 1 works, so that the air outlet of the air suction valve 3 generates negative pressure, the air suction valve 3 is automatically opened, air in the inner cavity of the pump system is pumped out to form vacuum, water is introduced into the pump cavity, and after the vacuum operation is finished, the air suction valve 3 is automatically closed.
As shown in fig. 2 to 5, the suction valve 3 of the system of the present invention includes a base 31, a valve body 32, a valve cover 33, a seal guide 34, an elastic valve seat 35, a rubber diaphragm 36, a wave spring 37, a diaphragm gasket 38, and a spring support 39. The base 31 is provided with an air inlet 313 and a flow passage 314 communicated with the air inlet 313; the base 31 is arranged at the inlet of the centrifugal pump, the air inlet 313 is communicated with the cavity of the inlet of the centrifugal pump, the valve body 32 is arranged above the base 31 and is of a cylinder structure, the side wall of the valve body is provided with an air outlet 321 communicated with the sleeve cavity, the air outlet 321 is communicated with the vacuum pump 1, a plurality of supporting plates 322 are arranged in the cavity of the valve body 32, and the bottom plate of the cylinder body is provided with a through hole 323; the bonnet 33 is disposed above the valve body 32 to close the cavity of the sleeve, and has an air hole 331 formed in an end surface thereof. The sealing guide rod 34 is arranged in the cavity of the valve body 32, the bottom end of the sealing guide rod extends out of the through hole 323 of the bottom plate of the cylinder body and is matched with the elastic valve seat 35 arranged between the base 31 and the valve body 32 to realize the blocking of fluid; the top end of the seal guide rod 34 extends out of the air hole 331 of the valve cover 33, or the top end of the seal guide rod 34 is fixedly provided with a screw 311, the screw 311 is installed in the air hole 331 of the valve cover 33, and a sealing gasket 312 is arranged between the screw 311 and the seal guide rod 34. In addition, the seal guide 34 is sleeved with a thrust pad 310 for limiting the downward displacement of the seal guide 34 and preventing the seal guide 34 from moving too much downward.
The rubber diaphragm 36, the diaphragm gasket 38, the wave spring 37 and the spring support 39 are sequentially sleeved on the sealing guide rod 34 from top to bottom; the outer periphery of the rubber diaphragm 36 is fixedly arranged between the valve body 32 and the valve cover 33, specifically, an annular mounting protrusion 361 is arranged on the outer periphery of the rubber diaphragm 36, an annular mounting groove 324 is arranged at the top end of the valve body 32, and the annular mounting protrusion 361 is mounted in the annular mounting groove 324 and used for preventing the rubber diaphragm 36 from falling off; the spring support 39 is mounted above the support plate 322, and the support plate 322 supports the spring support; the top end of the wave spring 37 is limited by the diaphragm gasket 38, the bottom end of the wave spring is limited by the spring support 39, specifically, the upper end surface of the spring support 39 is provided with an annular positioning groove 391, and the bottom end of the wave spring 37 is installed in the annular positioning groove 391.
As shown in fig. 3, a plurality of air inlets 313 of the base 31 are all communicated with the overflowing channel 314, and can be connected with a plurality of centrifugal pumps through pipelines, and the centrifugal pumps are vacuumized before being started. As shown in fig. 4 and 5, the bottom end of the seal guide rod 34 is provided with a seal boss 341 and a tapered rod 342, which are connected, the seal boss 341 is located in the cavity of the base 31, and the tapered rod 342 is arranged in the through hole 323 of the bottom plate of the cylinder body of the valve body 32. The through hole 323 of the bottom plate of the cylinder body is a tapered hole matched with the tapered rod 342 and used for realizing the guiding and slow circulation of fluid. As shown in fig. 6, the bottom surface of the elastic valve seat 35 is provided with an annular projection 351 and an annular groove 352; the annular protrusion 351 is matched with the bottom end of the seal guide rod 34 to realize sealing, and the annular groove 352 is matched with the upper end face of the base 31 to realize sealing.
The working principle of the air suction valve of the invention is as follows: the air suction valve 3 is normally supported at a closed position by a spring, when the air outlet 321 is vacuumized to form negative pressure, the atmospheric pressure at the top end of the sealing guide rod 34 is greater than the pressure inside the cavity of the air suction valve 3, under the action of the atmospheric pressure, the atmospheric pressure can enter the top of the valve and push the sealing gasket 312, the rubber diaphragm 36, the diaphragm gasket 38, the wave spring 37 and the sealing guide rod 34 to move downwards, so that a gap is formed between the sealing guide rod 34 and the base 31, a through hole 323 between the sleeve cavity and the overflowing channel 314 is opened, a channel connected with a water pump is opened, the air outlet 321 can continuously pump air and introduce liquid, when the air outlet 321 introduces liquid and forms certain pressure, the liquid pushes the sealing guide rod 34, the sealing guide rod 34 and the valve body 32 are closed to form sealing.
According to the characteristic that the speed of a rotating part is high, the lubricating mode adopted by the vacuum pump is continuous oil supply lubrication for the rotor and the sliding blade, and the rotor and the sliding blade can form negative pressure in a pipeline through high-speed rotation, so that lubricating oil in an oil tank is sucked into the vacuum pump after the vacuum pump works, the lubricating mode for continuous oil supply is realized, meanwhile, the oil level of a lubricating oil tank 4 of the vacuum pump 1 needs to be frequently checked, and the performance of the vacuum pump 1 is prevented from being influenced by dry friction; in order to avoid the siphon phenomenon of the lubricating oil after the vacuum pump 1 stops working, the ventilation hole on the lubricating oil tank 4 cover must ensure smoothness.
The system of the invention is used as follows: 1) connecting a water suction pipe and closing each valve on the water suction pipeline to prevent air leakage; 2) pressing down a water diversion switch button, vacuumizing and conducting water diversion; 3) after water diversion is finished, loosening a water diversion switch button, and stopping the vacuum pump; (if water cannot be successfully introduced into the water pump twice in succession, the operation of the vacuum pump is stopped, the sealing state of the whole water suction pipeline needs to be checked, the vacuum pump 1 can be operated again after leakage points are eliminated, and the operation of the vacuum pump needs to be separated by 3 minutes every time, so that the overheating of a motor of the vacuum pump is avoided); 4) engaging a water pump; 5) the rotating speed is improved, and the rated working condition of the water pump is achieved for fire fighting.
All valves in the system connected to the pump are checked and closed before the water pump begins to draw water. If the outlet of the water pump is sealed by a one-way valve, the main outlet valve need not be closed. Pressing the drain switch button closes the circuit to start the motor 2 to begin pumping vacuum. The suction valve 3 is normally supported in the closed position by a spring, and when the vacuum pump 1 is started, a low-pressure space is generated in the valve, atmospheric pressure enters the top of the valve and pushes the diaphragm downwards, the spring is compressed and a channel connected with the water pump is opened, so that the vacuum pump 1 starts to vacuumize and guide water to the water inlet of the water pump. After the diversion is finished, the diversion switch is loosened to turn off the motor 2, the vacuum pump 1 stops working, air returns to the valve, so that the pressure of the inside and outside atmosphere is consistent, the spring is reset, and a connecting channel between the valve and the water pump is closed. If water is not led out from the outlet of the vacuum pump 1 in the corresponding water leading time, the vacuum pump 1 needs to be shut down, whether the system pipeline is air-leaked or not is checked, and the lubricating oil tank 4 is ensured to normally supply lubricating oil to the vacuum pump 1.
Claims (10)
1. The utility model provides a pump is with electric vacuum pump diversion system which characterized in that: comprises a vacuum pump (1), a motor (2), an air suction valve (3) and a lubricating oil tank (4);
the motor (2) is connected with the vacuum pump (1) to drive the vacuum pump (1) to work, an outlet of the vacuum pump (1) is connected with the suction valve (3) through a pipeline, and the lubricating oil tank (4) provides lubricating oil for the vacuum pump (1) through a pipeline;
the air suction valve (3) comprises a base (31), a valve body (32), a valve cover (33), a sealing guide rod (34), an elastic valve seat (35), a rubber diaphragm (36), a wave spring (37), a diaphragm gasket (38) and a spring support (39); the base (31) is provided with an air inlet (313) and a flow passage (314) communicated with the air inlet (313); the valve body (32) is arranged above the base (31) and is of a cylinder structure, the side wall of the valve body is provided with an air outlet (321) communicated with the sleeve cavity, the sleeve cavity is internally provided with a plurality of supporting plates (322), and the sleeve bottom plate is provided with a through hole (323) communicated with the sleeve cavity and the overflowing channel (314); the valve cover (33) is arranged above the valve body (32) to seal the cavity of the sleeve, and an air hole (331) is formed in the end face of the valve cover;
the sealing guide rod (34) is arranged in the cavity of the valve body (32), the bottom end of the sealing guide rod extends out of the through hole (323) of the bottom plate of the cylinder body and is matched with an elastic valve seat (35) arranged between the base (31) and the valve body (32) to realize the blocking of fluid; the top end of the sealing guide rod (34) extends out of an air hole (331) of the valve cover (33); the rubber diaphragm (36), the diaphragm gasket (38), the wave spring (37) and the spring support (39) are sequentially sleeved on the sealing guide rod (34) from top to bottom; the outer periphery of the rubber diaphragm (36) is fixedly arranged between the valve body (32) and the valve cover (33); the spring support (39) is arranged above the support plate (322), and the support plate (322) supports the spring support; the top end of the wave spring (37) is limited by a diaphragm gasket (38), and the bottom end of the wave spring is limited by a spring support (39).
2. The priming system of an electric vacuum pump for a pump according to claim 1, wherein: and a check valve (5) is arranged on a pipeline connecting the lubricating oil tank (4) and the vacuum pump (1).
3. The priming system of an electric vacuum pump for a pump according to claim 2, wherein: the bottom end of the sealing guide rod (34) is provided with a sealing boss (341) and a conical rod (342) which are connected, the sealing boss (341) is positioned in the cavity of the base (31), and the conical rod (342) is arranged in a through hole (323) of the bottom plate of the cylinder body of the valve body (32).
4. The priming system of an electric vacuum pump for a pump according to claim 3, wherein: the through hole (323) of the cylinder bottom plate is a tapered hole matched with the tapered rod (342) and used for realizing the guiding and slow circulation of fluid.
5. The electric vacuum pump priming system for pumps of any one of claims 1 to 4, wherein: the seal guide rod (34) is sleeved with a thrust pad (310) for limiting the downward displacement of the seal guide rod (34).
6. The priming system of an electric vacuum pump for a pump according to claim 5, wherein: the bottom surface of the elastic valve seat (35) is provided with an annular bulge (351) and an annular groove (352); the annular protrusion (351) is matched with the bottom end of the sealing guide rod (34) to realize sealing, and the annular groove (352) is matched with the upper end face of the base (31) to realize sealing.
7. The priming system of an electric vacuum pump for a pump according to claim 6, wherein: be provided with annular installation arch (361) on the outer periphery of rubber diaphragm (36), the top of valve body (32) is provided with annular mounting groove (324), annular installation arch (361) are installed in annular mounting groove (324) for prevent that rubber diaphragm (36) from droing.
8. The priming system of an electric vacuum pump for a pump according to claim 7, wherein: the spring support (39) is provided with annular constant head tank (391) on the up end, the lower extreme of wave spring (37) is installed in annular constant head tank (391).
9. The priming system of an electric vacuum pump for a pump according to claim 8, wherein: a plurality of air inlets (313) of the base (31) are communicated with the overflowing channel (314).
10. The priming system for an electric vacuum pump for a pump of claim 9, wherein: the top end of the sealing guide rod (34) is fixedly provided with a screw (311), the screw (311) is installed in an air hole (331) of the valve cover (33), and a sealing gasket (312) is arranged between the screw (311) and the sealing guide rod (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911310502.3A CN110966209A (en) | 2019-12-18 | 2019-12-18 | Electric vacuum pump diversion system for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911310502.3A CN110966209A (en) | 2019-12-18 | 2019-12-18 | Electric vacuum pump diversion system for pump |
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| Publication Number | Publication Date |
|---|---|
| CN110966209A true CN110966209A (en) | 2020-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911310502.3A Pending CN110966209A (en) | 2019-12-18 | 2019-12-18 | Electric vacuum pump diversion system for pump |
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| CN (1) | CN110966209A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096932A (en) * | 2020-09-11 | 2020-12-18 | 无锡文森特阀业有限公司 | Air suction water stop valve |
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2019
- 2019-12-18 CN CN201911310502.3A patent/CN110966209A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096932A (en) * | 2020-09-11 | 2020-12-18 | 无锡文森特阀业有限公司 | Air suction water stop valve |
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