CN102829032B - The large-flow check valve of filter - Google Patents

The large-flow check valve of filter Download PDF

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Publication number
CN102829032B
CN102829032B CN201210366490.8A CN201210366490A CN102829032B CN 102829032 B CN102829032 B CN 102829032B CN 201210366490 A CN201210366490 A CN 201210366490A CN 102829032 B CN102829032 B CN 102829032B
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China
Prior art keywords
bolt
filter
spring
oil
check valve
Prior art date
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Application number
CN201210366490.8A
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Chinese (zh)
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CN102829032A (en
Inventor
黄翔
周国贞
王德达
杨芝刚
周国龙
冷云
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Nanjing Xunlian Fluid Technology Co.,Ltd.
Original Assignee
NANJING SOLINER HYDRAULIC PARTS CO Ltd
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Priority to CN201210366490.8A priority Critical patent/CN102829032B/en
Publication of CN102829032A publication Critical patent/CN102829032A/en
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  • Check Valves (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Filtration Of Liquid (AREA)

Abstract

The invention discloses the large-flow check valve of a kind of filter, the valve body (9) that it is connected with return filter, valve body (9) is internal equipped with cover plate (7), stay tube (5), spring (4), pressing plate (3), go here and there together with bolt (6) between them, fixing by stop nut (2) and regulate and open pressure, in order to prevent from coming off, bolt (6) end is also equipped with split pin (1)。Present configuration Nover practical, flow pressure drop is little, and oil filling capacity is strong, and can realize construction machinery hydraulic system increases the requirement of return filter。

Description

The large-flow check valve of filter
Technical field
The present invention relates to the return filter system in construction machinery hydraulic system, specifically a kind of check valve。
Background technology
Hydraulic fluid flow rate in construction machinery hydraulic system depends on pump delivery, engine revolution and oil cylinder two ends area ratio, change with operation due to engine revolution and change big (1000 revs/min～2500 revs/min) and oil cylinder two ends area ratio is bigger, so changes in flow rate is very big, therefore the bad selection of return filter, because changes in flow rate is big, selecting by maximum stream flow during fixed filter, installing space can be very big, cannot install, and costly。Check valve and filter use simultaneously, are connected in parallel, and a lot of producers do not reinstall oil strainer and check valve at present, have individually fixed filter, adopting traditional check valve, flow is less, and flow drooping characteristic is very poor, causing oil contamination serious, system is unstable, and fault rate is high。
Summary of the invention
The purpose of the present invention is aiming at the defect that said system exists, and the large-flow check valve of the filter of a kind of novel structure developed, and can be combined use with return filter, to solve oil contamination problem, and the reliability of raising system。
The technical solution used in the present invention is as follows:
A kind of large-flow check valve of filter, it is characterized in that it includes the valve body being connected with return filter, valve body side is provided with oil-in, opposite side is provided with oil-out, and described oil-out is provided with cover plate, and cover plate is provided with bolt, bolt is cased with spring, on the cover board, the other end withstands and is similarly installed at bolt top board on spring one end top, is also equipped with the stop nut being positioned at outside pressing plate on described bolt。
Also being set with a stay tube on described bolt, described spring one end is connected with cover plate, and the other end is enclosed within a stay tube。
Described stay tube one end is positioned at spring inner, and the other end is connected with pressing plate。
Described stay tube, spring, pressing plate between them with bolt string together, and in the end of bolt equipped with the split pin preventing stop nut from coming off。
Beneficial effects of the present invention has:
Novel structure is practical, and flow pressure drop is little, and oil filling capacity is strong, and can realize construction machinery hydraulic system increases the requirement of return filter。
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention。
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described:
As it is shown in figure 1, the present invention it include the valve body 9 that is connected with return filter, valve body 9 side is provided with oil-in 10, and opposite side is provided with oil-out 8。Being provided with cover plate 7 on oil-out 8, the center of cover plate 7 is provided with bolt 6, and bolt 6 is set with pressing plate 7, stay tube 5 and spring 4。Propping up stay tube 5 one end and be positioned at spring 4 inside, the other end is connected with pressing plate 7。Prop up stay tube 5 and play support spring and fixed position use。Spring 4 one end withstands on cover plate 7, and the other end is connected with pressing plate 3。Bolt 6 is also equipped with being positioned at the stop nut 2 in (i.e. the left side of pressing plate 3 shown in Fig. 1) outside pressing plate 3, and in the end of bolt 6 equipped with the split pin 2 preventing stop nut 2 from coming off。
Valve body 9 of the present invention is installed in parallel with return filter, in hydraulic work system process, when return flow less (metered flow less than filter), this closed check valve, oil return fluid passes through (filtering contaminants) from filter, when return flow relatively big (metered flow more than filter), this check valve is opened, an oil return fluid part passes through (filtering contaminants) from filter, unnecessary fluid is from this check valve oil-in 10, cover plate 7, oil-out 8 passes through, make the stability of flow by filter, it is not more than the metered flow of filter, realize engineering machinery oil return and filter can be installed, reduce the pollution of fluid, improve the reliability of the decorum。
Other the undeclared part that the present invention relates to is same as the prior art。

Claims (1)

1. the large-flow check valve of a filter, it is characterized in that it includes the valve body (9) being installed in parallel with return filter, valve body (9) side is provided with oil-in (10), opposite side is provided with oil-out (8), described oil-out (8) is provided with cover plate (7), cover plate (7) is provided with bolt (6), bolt (6) is cased with spring (4), spring (4) one end withstands on cover plate (7), the other end withstands the pressing plate (3) being similarly installed on bolt (6), described bolt (6) is also equipped with being positioned at the stop nut (2) in pressing plate (3) outside；Also being set with a stay tube (5) on described bolt (6), described spring (4) one end is connected with cover plate (7), and the other end is enclosed within a stay tube (5)；Described stay tube (5) one end is positioned at spring (4) inside, and the other end is connected with pressing plate (3)；Described stay tube (5), spring (4), pressing plate (3) are gone here and there together with bolt (6) between them, and in the end of bolt (6) equipped with the split pin (2) preventing stop nut (2) from coming off。
CN201210366490.8A 2012-09-28 2012-09-28 The large-flow check valve of filter Active CN102829032B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210366490.8A CN102829032B (en) 2012-09-28 2012-09-28 The large-flow check valve of filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210366490.8A CN102829032B (en) 2012-09-28 2012-09-28 The large-flow check valve of filter

Publications (2)

Publication Number Publication Date
CN102829032A CN102829032A (en) 2012-12-19
CN102829032B true CN102829032B (en) 2016-06-22

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Family Applications (1)

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CN201210366490.8A Active CN102829032B (en) 2012-09-28 2012-09-28 The large-flow check valve of filter

Country Status (1)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB709847A (en) * 1952-01-29 1954-06-02 Dowty Equipment Ltd Improvements relating to non-return valves
CN201396489Y (en) * 2009-04-20 2010-02-03 陈震宇 Filtration one-way valve
CN201461623U (en) * 2009-05-06 2010-05-12 中国海洋石油总公司 Integrated return oil filtrating device
CN101725742A (en) * 2009-12-11 2010-06-09 上海诺玛液压系统有限公司 One-way overflow valve
CN202431652U (en) * 2011-12-21 2012-09-12 南京讯联液压件有限公司 Return oil filter with automatic oil-supplementing function
CN202789872U (en) * 2012-09-28 2013-03-13 南京讯联液压件有限公司 High flow one-way valve for filter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB709847A (en) * 1952-01-29 1954-06-02 Dowty Equipment Ltd Improvements relating to non-return valves
CN201396489Y (en) * 2009-04-20 2010-02-03 陈震宇 Filtration one-way valve
CN201461623U (en) * 2009-05-06 2010-05-12 中国海洋石油总公司 Integrated return oil filtrating device
CN101725742A (en) * 2009-12-11 2010-06-09 上海诺玛液压系统有限公司 One-way overflow valve
CN202431652U (en) * 2011-12-21 2012-09-12 南京讯联液压件有限公司 Return oil filter with automatic oil-supplementing function
CN202789872U (en) * 2012-09-28 2013-03-13 南京讯联液压件有限公司 High flow one-way valve for filter

Also Published As

Publication number Publication date
CN102829032A (en) 2012-12-19

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Address after: 210033 Qixia Road, Jiangsu, Nanjing, Canton Road, No. 22

Patentee after: SOLINER (NANJING) INTELLIGENT TECHNOLOGY Co.,Ltd.

Address before: 210033 Qixia Road, Jiangsu, Nanjing, Canton Road, No. 22

Patentee before: Nanjing Soliner Hydraulic Component Co.,Ltd.

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Denomination of invention: Large flow check valve for filter

Effective date of registration: 20201218

Granted publication date: 20160622

Pledgee: Bank of China Limited Nanjing Chengdong Branch

Pledgor: Soliner (Nanjing) Intelligent Technology Co.,Ltd.

Registration number: Y2020980009588

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Registration number: Y2020980009588

PC01 Cancellation of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: Large flow check valve for filter

Effective date of registration: 20211130

Granted publication date: 20160622

Pledgee: Bank of China Limited Nanjing Chengdong Branch

Pledgor: SOLINER (NANJING) INTELLIGENT TECHNOLOGY Co.,Ltd.

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Address after: No. 99 Tuanjie Road, Yanchuangyuan, Nanjing Area, China (Jiangsu) Pilot Free Trade Zone, Nanjing, Jiangsu, 210000

Patentee after: Nanjing Xunlian Hydraulic Technology Co.,Ltd.

Address before: 210033 No.22 GuangYue Road, Qixia District, Nanjing City, Jiangsu Province

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Granted publication date: 20160622

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Registration number: Y2021980013644

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Country or region after: China

Address before: No. 99 Tuanjie Road, Yanchuangyuan, Nanjing Area, China (Jiangsu) Pilot Free Trade Zone, Nanjing, Jiangsu, 210000

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