CN2735058Y

CN2735058Y - Multifunctional hydraulic control valve

Info

Publication number: CN2735058Y
Application number: CN 200420107145
Authority: CN
Inventors: 付蕾
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-10-26
Filing date: 2004-10-26
Publication date: 2005-10-19
Anticipated expiration: 2014-10-26

Abstract

The utility model relates to a multifunctional hydraulic control valve in the hydraulic transmission, which provides in one valve body with two sets of oil flow controlling mechanisms and two sets of overflow valve mechanisms, which are communicated mutually via a series of internal channel in the valve body, forming an interlock crossing oil line, so as to constitute a hydraulic circuit of two-way speed governing, two-way pressure regulating, and two-way locking. The implement of the utility model, which improves the hydraulic control performance of the same hydraulic circuit and reduces the production costs apparently, and has evident economical and social benefits, overcomes defects that the prior art needs to provide more hydraulic components, large occupied space, more sealing links, and complex connectors and lines when realizing the same function.

Description

A kind of multifunctional hydraulic control valve

Technical field

The utility model relates to hydraulic transmission technology, particularly the hydraulic control valve in the hydraulic transmission.

Background technique

In the prior art, oil hydraulic circuit as shown in Figure 9 is bidirectional speed governing, the bidirectional pressure regulating of symmetric arrangement, the oil hydraulic circuit of bidirectional locking.Its function is: hydraulic actuator such as liquid cylinder piston are in accurately locking and positioning of arbitrary position; Piston two ends hydraulic pressure can arbitrarily be set up; Piston advance and retreat speed can be adjusted on demand.For realizing these functions, Technology Need configuration routinely: two relief valves are used for the regulating piston pressure at two ends; Two Pilot operated check valves are used for controlling bidirectional locking and accurately locate; Two common one-way valves, it is unidirectional unimpeded to be used for controlling fluid; Two orifice restriction elements are used for controlling oil cylinder front and back discharge velocity, by a selector valve control liquid flow path direction, by numerous joints and pipeline, these hydraulic element are coupled together again, form oil hydraulic circuit.Such configuration relate to hydraulic element many, take up room big, sealing part is many, cost of production is high, all brings many inconvenience to use, installation, maintenance, debugging.

Summary of the invention

The purpose of this utility model provides a kind of multifunctional hydraulic control valve, realizes the whole return circuits except that selector valve as shown in Figure 9 with a valve, dwindle installing space greatly, save numerous joints and pipeline, convenient installation, maintenance, debugging significantly reduce production costs.

The technical solution of the utility model is: a kind of multifunctional hydraulic control valve, by valve body and in establish two groups of oil flow control mechanism and two groups of relief valve mechanisms and form.Wherein, when one group of oil flow control mechanism lower end is the pressure oil import, the upper end is the oil return import, at this moment, pressure oil enters from this mechanism's lower end hydraulic fluid port, flow out from another upper end hydraulic fluid port of organizing oily flow control mechanism, oil return then flows to from the upper end hydraulic fluid port that this organizes oily flow control mechanism, organizes oily flow control mechanism lower end hydraulic fluid port from another and flows out.Every group of oil flow control mechanism is made up of hydraulic fluid port lower contact, unlatching piston, unlatching piston spring, unidirectional valve seat, nonreturn valve core, throttling valve core, throttling valve core spring, lining, hydraulic fluid port upper connection from bottom to top.Every group of oil flow control mechanism communicates at the upper body oil pocket that unlatching piston lower body oil pocket has passage and another to organize oily flow control mechanism unlatching piston, the filler opening of the relief valve mechanism that every group of passage is also relevant with this mechanism communicates, and the overflow hydraulic fluid port of this relief valve communicates with the upper body oil pocket that this oil flow control mechanism is opened piston.Every group of relief valve mechanism is made up of logical oily joint, overflow spool, spring seat, overflow spring, seal block, pressure regulation joint, pressure regulating screw and back of the body cap.When two relief valve mechanisms had only logical oily joint to be the pressure oil passageway, the overflow effect just played in relief valve mechanism.Two groups of oil flow control mechanism and two groups of relief valve mechanisms form chain intersection oil circuit, constitute bidirectional speed governing, bidirectional pressure regulating, bidirectional locking oil hydraulic circuit.

Enforcement of the present utility model, to overcome prior art in realizing identical function, needs outfit hydraulic element are many, the deficiency big, that sealing part is many, the joint pipeline is loaded down with trivial details takes up room, significantly improve the hydraulic control performance of identical oil hydraulic circuit, strengthen its reliability, and significantly reduce production costs.

Description of drawings

Fig. 1 is the structural representation of a kind of multifunctional hydraulic control valve of the utility model;

Fig. 2 is the A-A cross sectional side view of Fig. 1;

Fig. 3 looks schematic representation for the valve body master;

Fig. 4 is the A-A sectional view of Fig. 3;

Fig. 5 is the B-B sectional view of Fig. 3;

Fig. 6 is the C-C sectional view of Fig. 3;

Fig. 7 is the D-D sectional view of Fig. 3;

Fig. 8 is the E-E sectional view of Fig. 3;

Fig. 9 is a hydraulic circuit diagram.

Embodiment

As shown in Figure 1, one group of oil flow control mechanism is made up of valve body 1, hydraulic fluid port lower contact 2, unlatching piston 4, unlatching piston spring 5, unidirectional valve seat 7, nonreturn valve core 8, throttling valve core 9, lining 10, throttling valve core spring 11, hydraulic fluid port upper connection 12 from bottom to top, and two groups of oil of A1A2, B1B2 flow control mechanism structures are identical.Open 4 in piston in hydraulic fluid port lower contact 2, opening piston spring 5 is pressed on the unlatching piston 4, hydraulic fluid port upper connection 12 is fixed on unidirectional valve seat 7 on the valve body 1 by

lining

10,8 of nonreturn valve cores are on unidirectional valve seat 7, there is throttling pore at nonreturn valve core 8 centers, 9 of the throttling valve core of band valve rod are on nonreturn valve core 8, valve rod is in the throttling pore, small annulus area between throttling pore and the valve rod, become throttling passage, change this annulus area, can change the speed of actuator, throttling valve core spring 11 is pressed on the throttling valve core 9.Oil pocket A3 communicates with oil pocket C13 by valve body 1 inner duct, and oil pocket B6 communicates with oil pocket D14 by valve body 1 inner duct.

As shown in Figure 2, from left to right, two groups of relief valve mechanisms are made up of logical oily joint 15, overflow spool 18, spring seat 19, overflow spring 20, seal block 21, pressure regulation joint 22, adjusting screw 24 and back of the body cap 23, the right-hand member of logical oily joint 15 is relief valve seat, overflow spool 18 is sitting on the relief valve seat, spring seat 19 is pressed on the overflow spool 18, overflow spring 20 is pressed on the spring seat 19, seal block 21 is in pressure regulation joint 22 endoporus and contacts with adjusting screw 24, and two groups of relief valve mechanism structure of C1, C2 are identical.When oil pocket E16 overcurrent pressure oil, C1 relief valve mechanism just works, and at this moment, oil overflow stream enters oil pocket A6 by valve body inner bore road 27 as shown in Figure 1.Otherwise during oil pocket F25 overcurrent pressure oil, C2 relief valve mechanism just works, and at this moment, oil overflow stream enters oil pocket C13 by valve body inner bore road 28 as shown in Figure 1.

Shown in Fig. 3～8, the oil pocket A3 of valve body 1 through the duct 29, duct 30, duct 31, duct 32, duct 33 communicate with oil pocket C13; Oil pocket D14 through the duct 34, duct 35, duct 36, duct 37, duct 27 communicate with oil pocket B6.

During work, pressure oil enters valve body from the hydraulic fluid port lower contact 2 that A1A2 organizes oily flow control mechanism lower end, promote to start on the piston 4 and move, back down throttling valve core 9, then, pressure oil enters the oil pocket C13 that B1B2 organizes oily flow control mechanism by a series of internal channels of valve body 1, wash the unidirectional valve core 8 that B1B2 organizes oily flow control mechanism again open, organizing oily flow control mechanism top hydraulic fluid port upper connection 12 from B1B2 flows out, oil return then enters valve body from the hydraulic fluid port upper connection 12 that A1A2 organizes oily flow control mechanism top, flow to the oil pocket B6 that A1A2 organizes oily flow control mechanism by the valve rod of throttling valve core 9 and the throttling passage of one-way valve intracardiac hole formation again, a series of internal channels through valve body 1 arrive the oil pocket D14 that B1B2 organizes oily flow control mechanism again, and the hydraulic fluid port lower contact 2 of organizing oily flow control mechanism bottom from B1B2 is flowed out.When oil stream was reverse, situation was as the same.Thereby constitute the oil hydraulic circuit of a complete bidirectional speed governing, bidirectional pressure regulating, bidirectional locking, accurate location.

Claims

1, a kind of multifunctional hydraulic control valve is formed oily flow control mechanism by hydraulic fluid port lower contact (2), unlatching piston (4), unlatching piston spring (5), unidirectional valve seat (7), nonreturn valve core (8), throttling valve core (9), throttling valve core spring (11), lining (10) and hydraulic fluid port upper connection (12); Form relief valve mechanism by logical oily joint (15), overflow spool (18), spring seat (19), overflow spring (20), seal block (21), pressure regulation joint (22), pressure regulating screw (24) and back of the body cap (23), it is characterized in that: two groups of oil flow control mechanism and two groups of relief valve mechanisms are set in valve body (1), link up by the valve body series of passages, form chain intersection oil circuit, constitute bidirectional speed governing, bidirectional pressure regulating, bidirectional locking oil hydraulic circuit.

2, a kind of multifunctional hydraulic control valve as claimed in claim 1, it is characterized in that: there is throttling pore at nonreturn valve core (8) center, the throttling valve core (9) of band valve rod is sitting on the nonreturn valve core (8), valve rod is in the throttling pore, and the small annulus area between throttling pore and the valve rod becomes throttling passage.

3, a kind of multifunctional hydraulic control valve as claimed in claim 1 is characterized in that: the oil pocket A (3) of valve body (1) communicates with oil pocket C (13) by duct 29, duct 30, duct 31, duct 32, the duct 33 of valve body (1); Oil pocket D (14) communicates with oil pocket B (6) by duct (34), duct (35), duct (36), duct (37), duct (27) of valve body (1).