CN102322425A - External explosion-proof self-suction device of marine centrifugal pump - Google Patents
External explosion-proof self-suction device of marine centrifugal pump Download PDFInfo
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- CN102322425A CN102322425A CN201110308439A CN201110308439A CN102322425A CN 102322425 A CN102322425 A CN 102322425A CN 201110308439 A CN201110308439 A CN 201110308439A CN 201110308439 A CN201110308439 A CN 201110308439A CN 102322425 A CN102322425 A CN 102322425A
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Abstract
The invention discloses an external explosion-proof self-suction device of a marine centrifugal pump. The external explosion-proof self-suction device comprises a pneumatic valve, a pump inlet connection pipe, a small-diaphragm operating valve, a middle connection pipe, an ejector pump, an outlet connection pipe, a large-diaphragm operating valve, a pump inlet connection pipe and an air source connection pipe; the pneumatic valve and the small-diaphragm operating valve are normally-closed two-way valves; the large-diaphragm operating valve and the pneumatic valve adopt an integrated structure, and the large-diaphragm operating valve controls the pneumatic valve through a push rod; the small-diaphragm operating valve is installed on a connection pipeline between the pneumatic valve and the ejector pump and is communicated with a branch pipe of the pipeline; and an inlet of the small-diaphragm operating valve is connected with the pump inlet connection pipe, and an outlet of the small-diaphragm operating valve is communicated with the ejector pump. According to the external explosion-proof self-suction device disclosed by the invention, the ejector pump is driven by introducing compressed air, and the centrifugal pump is assisted in self-suction by utilizing the suction capability of the ejector pump; and once the centrifugal pump performs self-suction, water is output from a pump outlet to close the pneumatic valve through the large-diaphragm operating valve so as to cut off an air source and finish the suction assistance action. The entire operating process is completed through a valve-controlled pipeline and is free from open-flame generating conditions, the operation is safe and realizable, and the external explosion-proof self-suction device is especially suitable for the matching with a marine water pump.
Description
Technical field
The present invention relates to a kind of and the supporting self-priming apparatus of water pump, specifically, the present invention relates to the external explosion-proof type self-priming apparatus of a kind of marine centrifugal pump.
Background technique
Centrifugal pump is a kind of conventional structure pump, the suction capacity of centrifugal pump itself very a little less than.Many occasions require the equipped centrifugal pump of supporting centrifugal pump self-priming, particularly unmanned cabin that suction capacity must be arranged in the reality, otherwise can't realize automatic control.The present age, the self-priming apparatus of supporting centrifugal pump had multiple mature technology, although these technical products structures are different, it is exactly to lean on electric drive and control that a common ground is arranged.This type of power-actuated sequence circuit is simple, making is easy, reliable, can satisfy program control centrifugal pump self-priming and change with moving.Driving and control self-priming apparatus for common occasion electrification is succinct, the most most economical selection.And the boats and ships level of integration is high, and situation is special relatively, and especially loading hazmat ships such as chemical tanker, oil carrier, liquefied gas carrier are big because of the storage amount; Cabin and cabin close together; Add that cabin space is little, gas permeability is poor, thus dangerous big, institute's match equipment there are strict fire prevention, requirement of explosion proof; Existing technology leans on the self-priming apparatus of electric drive and control not do explosion-proof processing, and it is supporting to be not suitable for marine centrifugal pump.
Summary of the invention
The present invention is primarily aimed at the problem that existing technology is not suitable for supporting marine centrifugal pump; Propose a kind of not directly with the external explosion-proof type self-priming apparatus of the marine centrifugal pump of electric drive and control; This plant automation degree is high, and the operation flames of anger is safe and reliable; Flexible movements, accurate realize that suction capacity is strong, the time short.
The present invention realizes technical goal through following technical proposals.
The external explosion-proof type self-priming apparatus of marine centrifugal pump, it is a valve keyholed back plate road system, comprises pneumatic valve, pump inlet adapter, the moving valve of membranelle, middle adapter, jet pump, discharge connection, the moving valve of big film, pump discharge adapter and source of the gas adapter in the system.The moving valve of said pneumatic valve and membranelle is normally closed two-way valve.Its improvements are: said pneumatic valve and the moving valve integratedization structure of big film, both are through push rod interlock spool.The moving valve of said membranelle is installed between pneumatic valve and the jet pump connecting tube; The arm that is positioned at the pipeline middle part is linked up the moving valve insertion of membranelle; Move from the pressurized air promotion spool of pneumatic valve output; Realize that the moving valve import of membranelle connects with outlet, the import of the moving valve of membranelle connects pump inlet takes over, and outlet is through middle adapter UNICOM jet pump suction port.Said nozzle is positioned at jet pump middle part and import coaxial line; After nozzle compression supercharging, get into diffusing opening from the pressurized air of import input; High velocity air makes on one side jet pump suction port form negative pressure to facilitate pump water inlet, the gas liquid mixture the start up period that diffusing opening connecting the outside rear pump of discharge connection.The diaphragm bottom surface of the moving valve of said big film is provided with cavity, and cavity is taken over through built-in pipe and pump discharge and linked up, and carries the water of pressing and gets in the cavity in case pump is realized self-priming output, and drum promotes push rod and closes pneumatic valve on the diaphragm of pressurized, makes jet pump stop to help the suction effect.
In the said structure, the moving valve of big film is positioned under the pneumatic valve, goes up thrust greater than the active force that acts on the spool behind the diaphragm pressurized of the moving valve of big film.
The present invention compared with prior art has following good effect:
1, by valve keyholed back plate road system pneumatic and that hydraulic element are formed, the flames of anger produces condition in the running, and safety in operation is good, is fit to chemical tanker, oil carrier, liquefied gas carrier etc. and loads the supporting use of centrifugal pump in the hazmat ship;
2, by valve keyholed back plate road system pneumatic and that hydraulic element are formed, make program behavior by setting structure automatically, automaticity is high, is convenient in unattended cabin, use.
Description of drawings
Fig. 1 is a structural profile schematic representation of the present invention.
Embodiment
According to accompanying drawing and combine embodiment, the present invention is described further below.
The external explosion-proof type self-priming apparatus of marine centrifugal pump shown in Figure 1; It is a valve keyholed back plate road system, comprises pneumatic valve 1, pump inlet adapter 2, the moving valve 3 of membranelle, middle adapter 4, jet pump 5, discharge connection 6, the moving valve 7 of big film, pump discharge adapter 8 and source of the gas adapter 9 in the system.Said pneumatic valve 1 is normally closed two-way valve with the moving valve 3 of membranelle.Said pneumatic valve 1 is positioned at the bottom with moving valve 7 integral structures of big film, the moving valve 7 of big film, and aggressive valve 1 is positioned at top, between the two through push rod 1.2 interlock spools 1.1.The moving valve 3 of said membranelle is installed between pneumatic valve 1 and jet pump 5 connecting tubes; The arm that is positioned at the pipeline middle part is linked up moving valve 3 inner chambers 3.2 of membranelle; Move from the pressurized air promotion spool 3.1 of pneumatic valve 1 output; Realize that moving valve 3 imports of membranelle connect with outlet, the import of the moving valve 3 of membranelle connects pump inlet and takes over 2, and outlet is through middle adapter 4 UNICOM's jet pumps 5 suction ports.Said nozzle 5.1 is positioned at jet pump 5 middle parts and import coaxial line; After nozzle 5.1 compression superchargings, get into diffusing opening 5.2 from the pressurized air of import input; High velocity air makes on one side jet pump 5 suction ports form negative pressure to facilitate pump water inlet, the gas liquid mixture the start up period that diffusing opening 5.2 connecting the outside rear pump of discharge connection 6.The moving valve 7 of said big film is control pieces of pneumatic valve 1; Diaphragm 7.1 bottom surfaces of the moving valve 7 of big film are provided with cavity 7.2, and cavity 7.2 is taken over 8 through built-in pipe and pump discharge and linked up, in case pump is realized self-priming; Pump output is carried a part of water of pressing and is got in the cavitys 7.2 through pump discharge adapter 8; Pressurized 7.1 on drum promote push rod 1.2 and close pneumatic valve 1, pneumatic valve 1 cuts out and blocks source of the gas, makes jet pump 5 stop to help the suction effect.
The present invention utilizes the suction capactity of jet pump 5 to help institute's connection centrifugal pump to realize self-priming through introducing compressed air-driven jet pump 5.In case behind the centrifugal pump self-priming, close pneumatic valve 1 through the moving valve 7 of big film, block source of the gas and finish to help the suction effect from a part of water that carries pressure of pump discharge output.The whole service process is all accomplished through valve keyholed back plate road, does not have naked light to produce condition, and is safe and reliable to operation, loads the supporting use of centrifugal pump in the hazmat ship so be fit to chemical tanker, oil carrier, liquefied gas carrier etc.In addition, as long as the present invention is control pressurized air, just can do startup and stop the program behavior of self-priming by setting structure, and the water pump that is particularly suitable for being installed in the unmanned cabin is supporting.
Claims (2)
1. external explosion-proof type self-priming apparatus of marine centrifugal pump; It is a valve keyholed back plate road system, comprises in the system that (2), the moving valve (3) of membranelle, middle adapter (4), jet pump (5), discharge connection (6), the moving valve (7) of big film are taken in pneumatic valve (1), pump inlet, pump discharge takes over (8) and source of the gas is taken over (9); The moving valve (3) of said pneumatic valve (1) and membranelle is normally closed two-way valve; It is characterized in that: said pneumatic valve (1) and moving valve (7) integral structure of big film, both are through push rod (1.2) interlock spool (1.1); Said membranelle moves valve (3) and is installed between pneumatic valve (1) and jet pump (5) connecting tube; The arm that is positioned at the pipeline middle part is linked up moving valve (3) inner chamber (3.2) of membranelle; Move from the pressurized air promotion spool (3.1) of pneumatic valve (1) output; Realize that membranelle moves valve (3) import and connects with outlet, the import that membranelle moves valve (3) connects pump inlet adapter (2), and outlet is through middle adapter (4) UNICOM's jet pump (5) suction port; Said nozzle (5.1) is positioned at jet pump (5) middle part and import coaxial line; After nozzle (5.1) compression supercharging, get into diffusing opening (5.2) from the pressurized air of import input; High velocity air makes on one side jet pump (5) suction port form negative pressure to facilitate pump water inlet, and diffusing opening (5.2) connects the outwards gas liquid mixture rear pump start up period of discharge connection (6); Diaphragm (7.1) bottom surface of the moving valve (7) of said big film is provided with cavity (7.2); Cavity (7.2) is taken over (8) through built-in pipe and pump discharge and is linked up; In case pump is realized self-priming output and is carried the water of pressing and get in the cavity (7.2); The diaphragm of pressurized (7.1) is gone up drum promotion push rod (1.2) and is closed pneumatic valve (1), makes jet pump (5) stop to help the suction effect.
2. the external explosion-proof type self-priming apparatus of marine centrifugal pump according to claim 1; It is characterized in that: the moving valve (7) of said big film is positioned under the pneumatic valve (1), goes up thrust greater than the active force that acts on the spool (1.1) behind diaphragm (7.1) pressurized of the moving valve (7) of big film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110308439 CN102322425B (en) | 2011-10-13 | 2011-10-13 | External explosion-proof self-suction device of marine centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110308439 CN102322425B (en) | 2011-10-13 | 2011-10-13 | External explosion-proof self-suction device of marine centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102322425A true CN102322425A (en) | 2012-01-18 |
| CN102322425B CN102322425B (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110308439 Active CN102322425B (en) | 2011-10-13 | 2011-10-13 | External explosion-proof self-suction device of marine centrifugal pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481566A (en) * | 2016-11-30 | 2017-03-08 | 江苏振华泵业股份有限公司 | Autocontrol Marine Self-priming Centrifugal Pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1134479A (en) * | 1966-06-10 | 1968-11-27 | Hudson Eng Co | Self priming system for horizontal pumps |
| JPH11218088A (en) * | 1998-02-03 | 1999-08-10 | Ishikawajima Shibaura Mach Co Ltd | Drain valve structure of self-priming pump |
| CN200943584Y (en) * | 2006-04-03 | 2007-09-05 | 彭树林 | Differential pressure full-automatic valve of self priming pump |
| CN202338493U (en) * | 2011-10-13 | 2012-07-18 | 江苏万丰船用设备制造有限公司 | External explosion-proof type spontaneous suction device of marine centrifugal pump |
-
2011
- 2011-10-13 CN CN 201110308439 patent/CN102322425B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1134479A (en) * | 1966-06-10 | 1968-11-27 | Hudson Eng Co | Self priming system for horizontal pumps |
| JPH11218088A (en) * | 1998-02-03 | 1999-08-10 | Ishikawajima Shibaura Mach Co Ltd | Drain valve structure of self-priming pump |
| CN200943584Y (en) * | 2006-04-03 | 2007-09-05 | 彭树林 | Differential pressure full-automatic valve of self priming pump |
| CN202338493U (en) * | 2011-10-13 | 2012-07-18 | 江苏万丰船用设备制造有限公司 | External explosion-proof type spontaneous suction device of marine centrifugal pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481566A (en) * | 2016-11-30 | 2017-03-08 | 江苏振华泵业股份有限公司 | Autocontrol Marine Self-priming Centrifugal Pump |
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| Publication number | Publication date |
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| CN102322425B (en) | 2013-03-06 |
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