CN103883766B - Check valve for self-priming system - Google Patents

Check valve for self-priming system Download PDF

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Publication number
CN103883766B
CN103883766B CN201410086400.9A CN201410086400A CN103883766B CN 103883766 B CN103883766 B CN 103883766B CN 201410086400 A CN201410086400 A CN 201410086400A CN 103883766 B CN103883766 B CN 103883766B
Authority
CN
China
Prior art keywords
valve
clack box
self
suction
return valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201410086400.9A
Other languages
Chinese (zh)
Other versions
CN103883766A (en
Inventor
刘建瑞
汤富俊
王鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu University
Original Assignee
Jiangsu University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu University filed Critical Jiangsu University
Priority to CN201410086400.9A priority Critical patent/CN103883766B/en
Publication of CN103883766A publication Critical patent/CN103883766A/en
Application granted granted Critical
Publication of CN103883766B publication Critical patent/CN103883766B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/048—Ball features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The invention discloses a check valve for a self-priming system. The check valve comprises a suction section and a valve box, wherein the valve box is connected with the top end of the suction section. A filter screen is arranged inside the suction section and located between the suction section and the valve box. The valve box comprises a valve seat, a flat cushion stop piece and a valve box connecting portion. The valve seat is embedded in the bottom end of the valve box and provided with a through hole. The flat cushion stop piece is arranged inside the valve box and connected with the valve box into a whole. A spherical valve element is arranged between the flat cushion stop piece and the through hole of the valve seat. The valve box connecting portion is located on one side face of the valve box and used for being connected with a jet nozzle. When the check valve is used in the novel self-priming system, no auxiliary device needs to be additionally arranged outside a pump of this type, the check valve and the pump run in a completely-integrated mode, the whole system is driven by one diesel engine, and the check valve has the advantages of being simple in structure, easy to cast, convenient to install, low in cost and the like.

Description

A kind of non-return valve for self-suction system
Technical field
Non-return valve the invention belongs to valve field, in more particularly, to a kind of self-suction system being applied to Self-priming pump.
Background technology
At present, adopt internal-mixing and exterior mixing self-priming mode domestic self priming pump, this kind of self-priming mode has and lacks than larger more Fall into, that is, mechanical loss and hydraulic loss are larger；Need first to add water in pump chamber before pump operating；Then it is difficult to when running into big flow operating mode Realize self-priming.And less to the research of jet self-priming pump at present, and existing jet self-priming pump is all additional auxiliary at present Device, needs two and the drive of above motor, and overall structure is more complicated, runs inconvenient.
Content of the invention
The purpose of the present invention is to overcome the shortcomings of in prior art, provides a kind of structure simple, with low cost, easy for installation The self-suction system being applied to Self-priming pump in non-return valve.
Technical scheme:
A kind of non-return valve for self-suction system, including suction casing and clack box.Described suction casing top connects clack box, described There is filter screen in suction casing, between suction casing and clack box, the impurity flowing through suction casing can be filtered.
Described clack box includes valve seat, plain cushion block and clack box connecting portion, described valve seat be embedded in described clack box bottom and Have through hole, described plain cushion block is connected as a single entity in described clack box inside and with described clack box, and the integrally casting of plain cushion block is not Need in addition to cast valve gap, material-saving；Described plain cushion block with spherical valve core between the through hole of described valve seat, play open and Turn off the effect of non-return valve；Described clack box connecting portion, in described clack box one side, connects for same jet nozzle.
Beneficial effects of the present invention: the present invention propose a kind of for the non-return valve in the self-suction system of Self-priming pump, should Non-return valve is used in self-priming system so that the type pump does not need additional servicing unit, complete and pump one running body, entirely System is all driven by a diesel engine, and its feature is:, simply it is easy to casting, easy for installation, cost is low for structure.
Brief description
Fig. 1 is the structure chart of the non-return valve of the present invention.
In figure: 1, suction casing；2nd, filter screen；3rd, valve seat；4th, valve element；5th, clack box；6th, plain cushion block；7th, clack box connecting portion.
Specific embodiment
Below in conjunction with the accompanying drawings one embodiment of the present of invention is further described:
A kind of check valve arrangement for self-priming system of the present invention is as shown in figure 1, include: suction casing 1, filter screen 2, Valve seat 3, valve element 4, clack box 5, plain cushion block 6, clack box connecting portion 7.
The top of suction casing 1 connects clack box 5, has filter screen 2 in it, and between suction casing 1 and clack box 5, filter screen 2 is hemisphere Shape and be downwardly projected about 22mm, material is copper, and its surface is covered with the through hole of a diameter of 1mm, can filter and flow through the miscellaneous of suction casing 1 Matter.Clack box 5 part includes valve seat 3, plain cushion block 6 and clack box connecting portion 7, is wherein embedded with valve seat between clack box 5 and suction casing 1 3, described valve seat 3 opens up through hole, a diameter of 16mm, by described through hole insertion, valve seat 3 is cylindric for clack box 5 and suction casing 1 And its through hole upper port has the annular skewed slot of outside 45 degree of inclinations；Plain cushion block 6 is linked as in clack box 5 inside and with clack box 5 Integrally, because plain cushion block 6 is integrated casting with clack box 5 it is not necessary in addition cast valve gap, material-saving；The same valve of plain cushion block 6 It is spherical valve core 4 between the through hole of seat 3, this spherical valve core 4 is placed on valve seat, and material is rubber, and a diameter of 25mm plays open-minded With the effect turning off non-return valve, the actual center gravity of spherical valve core 4 and the deviation of geometric center of gravity are not more than this spherical valve core radius 5%, and the raising height of spherical valve core 4 is the 5%～10% of its diameter, ensures that spherical valve core 4 is in surely when opening situation with this Determine state, uniformly unobstructed can flow through through hole in order to gas；Plain cushion block 6 surface is about with spherical valve core 4 top distance 5mm, it is a cylinder shape groove and the 3mm that caves inward that plain cushion block 6 bottom surface contacts end face with spherical valve core 4, its cylinder shape groove The diameter with diameter greater than spherical valve core 4, movement under situation of opening for the spherical valve core 4 can be limited；Clack box connecting portion 7 In the one side of clack box 5, connect for same jet nozzle.
In above-mentioned whole non-return valve, filter screen 2 and valve seat 3 material are copper, spherical valve core 4 material is rubber, suction casing 1, valve Case 5, the material of plain cushion block 6 are ht200.
The operation principle of this non-return valve is: before pump is started working, is full of air in suction casing 1, valve element is sky about 4 Gas, is atmospheric pressure, and due to self gravitation effect, valve element 4 is pressed on valve seat 3, and valve element 4 is in sealing state, whole non-return valve Close；When pump brings into operation, jet nozzle is started working, because the clack box connecting portion 7 of clack box 5 one side is connected to jet spray Mouth, nozzle will gradually be extracted the air in clack box out, and valve element 4 upper space gradually produces negative pressure, because bottom is atmospheric pressure, by In differential pressure action, when pressure reduction pressure is more than valve element 4 self gravitation, spherical valve core 4 is backed down upwards, air quilt in suction casing 1 It is pumped in clack box 5 and discharged by jet nozzle.Because plain cushion block 6 acts on, spherical valve core 4 will not be siphoned away in the lump.Work as pump After suction casing 1 is fully drained, liquid medium is full of suction casing 1 to intracavity gas, no longer has air in suction casing 1, and inside will Produce negative pressure, pressure is less than pressure in clack box 5, and due to differential pressure action, spherical valve core 4 is depressed downwardly, and spherical valve core 4 seals, Non-return valve is closed, and pump starts normal work, because in the course of work, suction casing is always maintained at hydraulically full state, i.e. negative pressure shape State, so spherical valve core 4 will seal always, non-return valve is constantly in closed mode, and working media will not pass through spherical valve core 4 quilt It is drawn in clack box 5 even jet nozzle, thus do not interfere with the normal work of pump.

Claims (7)

1. a kind of non-return valve for self-suction system, including suction casing (1) it is characterised in that: described suction casing (1) upper end is provided with Clack box (5), is embedded with valve seat (3), described valve seat (3) opens up through hole between described clack box (5) and described suction casing (1), described Clack box (5) and described suction casing (1), by described through hole insertion, described clack box (5) are additionally provided with clack box connecting portion (7), described Clack box connecting portion (7) is used for connecting jet nozzle；It is fixed with plain cushion block (6), described plain cushion block inside described clack box (5) (6) it is provided with valve element (4) and described through hole between.
2. a kind of non-return valve for self-suction system according to claim 1 it is characterised in that on described valve seat (3) The annular skewed slot of outside 45 degree of inclinations is had, described valve element (4) is spherical valve core at described through hole upper port.
3. a kind of non-return valve for self-suction system according to claim 2 is it is characterised in that described plain cushion block (6) With described spherical valve core (4) just to contact end face be a cylinder shape groove, described cylinder shape groove with diameter greater than described ball The diameter of shape valve element (4).
4. a kind of non-return valve for self-suction system according to Claims 2 or 3 is it is characterised in that described spherical valve core (4) deviation of actual center gravity and geometric center of gravity is not more than the 5% of described spherical valve core radius, the lifting of described spherical valve core (4) It is highly the 5%～10% of its diameter.
5. a kind of non-return valve for self-suction system according to claim 1 or 2 or 3 is it is characterised in that described plain cushion keeps off Block (6) is integrated casting with described clack box (5).
6. a kind of non-return valve for self-suction system according to claim 1 or 2 or 3 is it is characterised in that described suction casing (1) it is provided with filter screen (2) and described clack box (5) between.
7. a kind of non-return valve for self-suction system according to claim 6 is it is characterised in that described filter screen (2) and institute The material stating valve seat (3) is copper, and the material of described valve element (4) is rubber, described suction casing (1), described clack box (5) and described put down The material of pad block (6) is ht200.
CN201410086400.9A 2014-03-11 2014-03-11 Check valve for self-priming system Expired - Fee Related CN103883766B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410086400.9A CN103883766B (en) 2014-03-11 2014-03-11 Check valve for self-priming system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410086400.9A CN103883766B (en) 2014-03-11 2014-03-11 Check valve for self-priming system

Publications (2)

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CN103883766A CN103883766A (en) 2014-06-25
CN103883766B true CN103883766B (en) 2017-01-18

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105298857B (en) * 2015-11-19 2017-12-05 江苏大学 A kind of non-return valve of big-flow self-priming centrifugal pump self-suction system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200952499Y (en) * 2006-10-13 2007-09-26 上海昱豪高压清洗机有限公司 Self-priming valve on high-pressure cleaner
CN201141358Y (en) * 2007-11-15 2008-10-29 陈江枫 Supercharging high-lift clean water pump of blade self-suction jet pipe
CN101672284A (en) * 2009-09-23 2010-03-17 福建省银象电器有限公司 Externally-connected jet device with preposed water pump
CN202209281U (en) * 2011-09-01 2012-05-02 江苏滔海机械制造有限公司 High-efficiency energy-saving combined type self-sucking pump
CN202266712U (en) * 2011-10-17 2012-06-06 伯纳德(天津)仪表技术有限公司 Novel ball type one-way check valve
CN203906903U (en) * 2014-03-11 2014-10-29 江苏大学 Check valve with self-sucking system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4359962B2 (en) * 1999-06-04 2009-11-11 栗田工業株式会社 Check valve for liquid pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200952499Y (en) * 2006-10-13 2007-09-26 上海昱豪高压清洗机有限公司 Self-priming valve on high-pressure cleaner
CN201141358Y (en) * 2007-11-15 2008-10-29 陈江枫 Supercharging high-lift clean water pump of blade self-suction jet pipe
CN101672284A (en) * 2009-09-23 2010-03-17 福建省银象电器有限公司 Externally-connected jet device with preposed water pump
CN202209281U (en) * 2011-09-01 2012-05-02 江苏滔海机械制造有限公司 High-efficiency energy-saving combined type self-sucking pump
CN202266712U (en) * 2011-10-17 2012-06-06 伯纳德(天津)仪表技术有限公司 Novel ball type one-way check valve
CN203906903U (en) * 2014-03-11 2014-10-29 江苏大学 Check valve with self-sucking system

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Granted publication date: 20170118

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