CN101936315B - Zero-leakage unloading valve bank - Google Patents

Zero-leakage unloading valve bank Download PDF

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Publication number
CN101936315B
CN101936315B CN 201010290570 CN201010290570A CN101936315B CN 101936315 B CN101936315 B CN 101936315B CN 201010290570 CN201010290570 CN 201010290570 CN 201010290570 A CN201010290570 A CN 201010290570A CN 101936315 B CN101936315 B CN 101936315B
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valve
load
oil
unloading
solenoid ball
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CN 201010290570
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CN101936315A (en
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竺浩君
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NINGBO BOLEV HYDRAULICS CO., LTD.
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竺浩君
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Abstract

The invention relates to a zero-leakage unloading valve bank which is installed in an upper hydraulic system of a truck crane. The unloading valve body is provided with two oil inlets (Y1,Y2), and the two oil inlets (Y1,Y2) are respectively connected with two one-way valves on the unloading valve and remote control ports of two working oil pump safety valves of the hydraulic system. The unloading valve body is provided with an unloading oil port (L), and oil outlets (P01, P02) on the two one-way valves are connected with a flow inlet channel (P0) on the unloading valve body. The flow inlet channel (P0) is connected with an oil inlet (L) on a solenoid ball valve, an oil outlet (L02) of the solenoid ball valve is connected with a backflow channel (L0) of the unloading valve body, and the backflow channel (L0) is connected with the unloading oil port (L). Each one-way valve and the solenoid ball valve are arranged near corresponding oil ports, so that the zero-leakage unloading valve bank has compact structure and small size, the length of the flow channel is greatly reduced, energy consumption is reduced, and maintenance and manufacturing is easy. The two one-way valves prevent the mutual interference of pressure signals of two working oil pumps. When the upper hydraulic system of the truck crane operates normally, the solenoid ball valve reaches zero leakage, and the operating efficiency of the upper hydraulic system of the truck crane is greatly improved.

Description

The zero leakage unloading valve group
Technical field
The present invention relates to a kind of unloading valve group, particularly a kind of being widely used in carried out the zero leakage unloading valve group that safety protection is used to system for hydraulic system of truck crane each actuator of getting on the bus.
Background technique
During crane job; be about to exceed the operating mode of its permission when hoist; in the situation that might meet accident; make the unloading valve action by electrical signal; link up the relief valve remote control mouth of its control; make the oil hydraulic pump off-load, no longer continuing provides pressure oil-source to the dangerous moving direction of hydraulic actuator, the effect of playing protection equipment and reminding operator to note.
At present, domestic a lot of hydraulic mobile crane is got on the bus, and the multi-way valve control system adopts the control valve with each actuator's safety protection to pass through pipeline connecting mode composition control valve group, therefore cause control system bulky, installation and maintenance difficulty, the defective that automaticity is low; Although on domestic minority hydraulic mobile crane and the external hydraulic mobile crane, also adopt integrated mode that each control valve is combined, complex structure, bulky, expensive and can not reach zero leakage, cause hoist work Efficiency Decreasing.
The used unloading valve of number of patent application 200610015645.8 " for the protection of the unloading valve component structure of compressor " is the mechanical compression unloading valve, be installed in and need not ABAP Adapter between the high-low pressure pipe, but it is only applicable to protect the compressor of air conditioner.
Summary of the invention
Technical problem to be solved by this invention is: a kind of zero leakage unloading valve group is provided, it is simple in structure, volume is little, and automaticity is high, and used Solenoid ball valve can reach zero leakage, safe and reliable, greatly promoted the working efficiency of truck crane hydraulic system.
The present invention addresses the above problem the technological scheme that adopts: the zero leakage unloading valve group, comprise the one-way valve that is installed on the off-load valve body, and also comprise the Solenoid ball valve that is fixedly connected on the off-load valve body, two filler opening Y are arranged on the described off-load valve body 1, Y 2, be connected with two one-way valves on the off-load valve body respectively, and be connected with the remote control mouth of two working oil pump relief valves of hydraulic system, also have off-load hydraulic fluid port L, the oil outlet P on two one-way valves on the described off-load valve body 01, P 02With the influent stream road P on the off-load valve body 0Connect described influent stream road P 0With the filler opening L on the Solenoid ball valve 01Connect the oil outlet L on the Solenoid ball valve 02With the backflow road L on the off-load valve body 0Connect backflow road L 0L is connected with the off-load hydraulic fluid port.
Compared with prior art, the invention has the advantages that: this unloading valve group has only adopted the structure of two identical one-way valves and Solenoid ball valve, and two one-way valves only enter Solenoid ball valve with an influent stream road on the off-load valve body, its used part height integrates, part is few, simple in structure, easily assembling, and each one-way valve is with near Solenoid ball valve all is arranged on corresponding separately hydraulic fluid port, make its more compact structure, volume little, processing cost is low, and greatly shortens and reduced the length of runner, reduced energy consumption, the maintenance of being more convenient for is made.Again because having adopted the structure of two one-way valves, two work oil pumps have been isolated, also prevented simultaneously the impact of two working oil pumping pressure signal phases mutual interference, and automaticity is high, under truck crane hydraulic system normal operation, Solenoid ball valve can reach zero leakage, has therefore greatly promoted the working efficiency of truck crane hydraulic system.
Description of drawings
Fig. 1, profile schematic representation of the present invention.
Fig. 2, hydraulic schematic diagram of the present invention.
The A-A view of Fig. 3, Fig. 1.
The B-B view of Fig. 4, Fig. 1 (being the Solenoid ball valve off-position).
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further described.
Solenoid ball valve DHF 1, by the push rod I 9 and the steel ball I 7 that are equipped with successively in the horizontal ladder hole on the ball valve body 5 on the steel ball III 13, the push rod II 12 that usher to seat, steel ball II 11, the one-way valve seat 8, and with being fixed on the sidewall of ball valve body 5 with spring seat 6 usefulness of the spring screw thread on it, another sidewall corresponding with spring seat is fixed on seat 15 on the ball valve body 5 with screw, be screwed the lower end of lever 14 in present 15, lever 14 upper ends cooperate with electromagnet 10 on the Solenoid ball valve 1.
The oil outlet L that has the mutually perpendicular mouth of pipe to consist of at one-way valve seat 8 lower opening places 02, and oil outlet L 02Also with off-load valve body 2 on backflow road L 0Connect, and backflow road L 0Be connected with off-load hydraulic fluid port L perpendicular on off-load valve body one sidewall, and off-load hydraulic fluid port L is connected (figure does not draw) with fuel tank, Solenoid ball valve 1 is screwed at off-load valve body 2 and is board-like connection, as shown in Figure 4.
Two corresponding filler opening Y are arranged on the two corresponding sidewalls of off-load valve body 2 1, Y 2, also have and filler opening Y 1, Y 2Communicate two one-way valve DF 14, DF 24 ', two one-way valves adopt screw thread inserting type to be installed on the off-load valve body two one-way valves 4,4 ' also it is enclosed in the off-load valve body 2 two filler opening Y on the corresponding sidewall of off-load valve body with plug screw 3,16 1, Y 2The externally remote control hydraulic fluid port of two working oil pump relief valves of difference connected system, and filler opening Y 1Internal corresponding one-way valve DF 1Front end, filler opening Y 2Internal corresponding one-way valve DF 2Front end, the oil outlet P of two one-way valves 01, P 02Communicate and by the influent stream road P on the off-load valve body 2 0Enter the filler opening L of Solenoid ball valve 1 01After, the oil outlet L from the Solenoid ball valve 1 02Outflow is through backflow road L 0Arrive off-load hydraulic fluid port L, off-load hydraulic fluid port L is connected with fuel tank, as shown in Figure 3, Figure 4 again.
The electrical signal of Solenoid ball valve 1 is controlled by computer program, Solenoid ball valve 1 must not the electricity operating mode under, as filler opening Y 1Build-up pressure, pressure oil liquid is opened inner elements of check valve through one-way valve 4, enters one-way valve 4, because the oil outlet of two one-way valves communicates, and can react on one-way valve 4 ', the spool of closing one-way valve and closed check valve 4 ', prevent filler opening Y 1And Y 2Produce to disturb, pressure oil liquid enters Solenoid ball valve 1 simultaneously, acts on the steel ball I 7 on the Solenoid ball valve 1, at this moment by the block electromagnetic ball valve closed check valve 4 of steel ball, makes pressure oil liquid not enter the off-load runner by Solenoid ball valve, guarantees that system works normally and efficiently.
As filler opening Y 2Build-up pressure, pressure oil liquid through one-way valve 4 ', open one-way valve 4 ' spool enter one-way valve 4 ', and react on one-way valve 4, closing one-way valve 4 spools and closed check valve 4 prevent filler opening Y 1And Y 2Produce to disturb, pressure oil liquid enters Solenoid ball valve 1 simultaneously, acts on Solenoid ball valve steel ball I7, by the block electromagnetic ball valve closed check valve 4 of steel ball ', make pressure oil liquid not enter the off-load runner by Solenoid ball valve, guarantee that system works normally and efficiently.
As filler opening Y 1And Y 2The while build-up pressure, the fluid that pressure is high enters its corresponding one-way valve, and react on low nonreturn valve core corresponding to fluid of pressure, sealing low pressure fluid enters one-way valve, prevents that two pressure oil liquids from disturbing, and the high fluid of pressure enters Solenoid ball valve 1 simultaneously, act on the steel ball I 7 of Solenoid ball valve 1, the high one-way valve of block electromagnetic ball valve confining pressure by steel ball makes pressure oil liquid not enter the off-load runner by Solenoid ball valve, guarantees that system works normally and efficiently.
Such as each actuator hoisting mechanism pulleying, hoisting mechanism reel steel wire ropes appear only during the dangerous working condition such as surplus last 3 circles and overload, the conducting of computer program identification signal, and it is electric that Solenoid ball valve 1 is got, electromagnet 10 actions promote lever 14 and move with its steel ball III 13 that match, that be connected, push rod II 12, steel ball II 11 and push rod I 9, at this moment back down steel ball I 7 by push rod I 9 it is moved right, and open filler opening L 01, open the safety valve remote control mouth of two oil pumps of work, work fluid enters in the valve by the Solenoid ball valve 1 of opening, and links up off-load hydraulic fluid port L, with the work fluid by solenoid valve 1 through oil outlet L 02Backflow road L on the off-load valve body 0, flow to off-load hydraulic fluid port L, and lead directly to fuel tank again, at this moment go up each actuator of vehicle hydraulic system and stop action, finish the safety protection effect.When system works again, force Solenoid ball valve 1 outage, system enters again normal operation.

Claims (4)

1. zero leakage unloading valve group, comprise the one-way valve that is installed on the off-load valve body (2), characterized by further comprising the Solenoid ball valve (1) that is fixedly connected on the off-load valve body (2), two filler openings (Y1, Y2) are arranged on the described off-load valve body (2), be connected with two one-way valves (4,4 ') on the off-load valve body respectively, and be connected with the remote control mouth of two working oil pump relief valves of hydraulic system, the upper in addition off-load hydraulic fluid port (L) of described off-load valve body (2), the oil outlet (P on two one-way valves 01, P 02) with the off-load valve body on influent stream road (P 0) connect described influent stream road (P 0) with Solenoid ball valve (1) on filler opening (L 01) connect the oil outlet (L on the Solenoid ball valve (1) 02) with off-load valve body (2) on backflow road (L 0) connect backflow road (L 0) be connected with off-load hydraulic fluid port (L).
2. zero leakage unloading valve group according to claim 1 is characterized in that described off-load hydraulic fluid port (L) is connected with fuel tank.
3. zero leakage unloading valve group according to claim 1 is characterized in that described Solenoid ball valve (1) is screwed on off-load valve body (2).
4. zero leakage unloading valve group according to claim 1 is characterized in that described two one-way valves (4,4 ') are plugged on the off-load valve body (2) with screw thread, also uses plug screw (3,16) to be enclosed in the off-load valve body (2).
CN 201010290570 2010-09-20 2010-09-20 Zero-leakage unloading valve bank Active CN101936315B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN101936315B true CN101936315B (en) 2013-03-13

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104235103A (en) * 2014-09-15 2014-12-24 宝鸡航天动力泵业有限公司 Electromagnetic unloading valve

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB587796A (en) * 1944-06-27 1947-05-06 Merit Engineering Inc Improvements in unloading valve
US3375844A (en) * 1963-12-18 1968-04-02 Mercier Jean Unloader valve
CN1811202A (en) * 2006-02-11 2006-08-02 中国矿业大学 Electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode
CN201475435U (en) * 2009-04-10 2010-05-19 竺浩君 Double linked one-way valve group
CN201539457U (en) * 2009-10-29 2010-08-04 宁波市博尔法液压有限公司 Ball-type electromagnetic directional valve
CN201810600U (en) * 2010-09-20 2011-04-27 宁波市博尔法液压有限公司 Zero leakage unloading valve bank

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5926679A (en) * 1982-08-03 1984-02-10 Diesel Kiki Co Ltd Unloading valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB587796A (en) * 1944-06-27 1947-05-06 Merit Engineering Inc Improvements in unloading valve
US3375844A (en) * 1963-12-18 1968-04-02 Mercier Jean Unloader valve
CN1811202A (en) * 2006-02-11 2006-08-02 中国矿业大学 Electrohydraulic unloading valve with both hydraulic control mode and electrohydraulic control mode
CN201475435U (en) * 2009-04-10 2010-05-19 竺浩君 Double linked one-way valve group
CN201539457U (en) * 2009-10-29 2010-08-04 宁波市博尔法液压有限公司 Ball-type electromagnetic directional valve
CN201810600U (en) * 2010-09-20 2011-04-27 宁波市博尔法液压有限公司 Zero leakage unloading valve bank

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP昭59-26679A 1984.02.10

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Owner name: NINGBO BOLEV HYDRAULICS CO., LTD.

Free format text: FORMER OWNER: ZHU HAOJUN

Effective date: 20130515

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Effective date of registration: 20130515

Address after: 315502 Zhejiang province Fenghua Xikou Industrial Park Zongyan Road No. 27

Patentee after: NINGBO BOLEV HYDRAULICS CO., LTD.

Address before: 315502 Zhejiang province Fenghua Xikou Industrial Park Soken Road No. 27 Ningbo bo'erfa Hydraulic Co. Ltd.

Patentee before: Du Haojun

C41 Transfer of patent application or patent right or utility model
PE01 Entry into force 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: Zero leakage unloading valve group

Effective date of registration: 20211122

Granted publication date: 20130313

Pledgee: Bank of Ningbo Co.,Ltd. Fenghua sub branch

Pledgor: NINGBO BOLEV HYDRAULICS Co.,Ltd.

Registration number: Y2021330002304