CN1294267A

CN1294267A - 3-position 4-way centralizing block for stabilizing hydraulic pressure

Info

Publication number: CN1294267A
Application number: CN 99115619
Authority: CN
Inventors: 卜岳龙; 卜劲松
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-11-01
Filing date: 1999-11-01
Publication date: 2001-05-09

Abstract

A hydraulic pressure-stabilizing collecting block for three positions and four ways is composed of 3-position 4-way electromagnetic communtating valve, advance overflow valve, backing overflow valve and pressure-stabilizing control valve. When working piston moves forward, it has multiple oil returning channels. When working piston moves backward, the oil can come in the front cylinder only after the pressure in back cylinder is released. Its advantages are simple structure and reliable pressure-stabilizing performance. The pressure-holding period is 24 hrs for static state or 6 hrs for dynamic state. The ripple of pressure is 2.5 MPa.

Description

Piece is concentrated in the three-position four-way hydraulic voltage stabilizing

The present invention relates to a kind of hydraulic pressure and concentrate piece, piece is concentrated in particularly a kind of three-position four-way hydraulic voltage stabilizing.

Realize in the existing filter-press dehydration equipment that stabilizing hydraulic pressure has four kinds of methods: i.e. 1. mechanical screw mandrel locking methods; 2. hydraulic pressure advances the back to use the swivel nut locking method on two guide shafts; 3. hydraulic pressure advances the back to use the handwheel locking method on working piston; 4. hydraulic pressure is concentrated piece, and its pressurize is to realize by hydraulic element and frequent complementary energy.Adopt mechanical method for stabilizing voltage, the bookkeeping strong sense of responsibility, labor strength is big, and manufacturing efficiency is low, under the impact of filter plate when the certain pressure curve, the damage percentage height.Adopt hydraulic pressure to concentrate the method for piece better, but its required hydraulic pressure and electrical apparatus element are more, complex structure, price is higher, breaks down easily; Because complementary energy is frequent, voltage regulation performance is poor, under the impact of filter plate when the certain pressure curve, filter plate year, damage percentage was up to 30%, and influenced the working life of hydraulic pressure and electrical apparatus element, operation inconvenience, maintenance difficult, the maintenance expenses height is ganged up or the chain appearance of program when malfunctioning when cylinder chamber behind the operating cylinder, front end housing often takes place burst phenomenon.

The object of the present invention is to provide a kind of concentrated piece of three-position four-way hydraulic voltage stabilizing that reduces hydraulic pressure and electrical apparatus element and can cancel complementary energy.

The objective of the invention is to realize by following approach: piece is concentrated in the three-position four-way hydraulic voltage stabilizing, it comprises the 3-position 4-way solenoid directional control valve 2 that is loaded on the concentrated block 13, relief valve 7 advances, retreat relief valve 1, it also comprises the voltage stabilizing control valve 43 that is loaded on the concentrated block 13, the spool 40 of voltage stabilizing control valve 43 is loaded in the valve opening, sliding pin bar 18 right-hand members that rely on the spool 40 are equipped with voltage stabilizing steel ball 17, pressure-stabilizing spring 15 through spring seat 16 roof pressures on voltage stabilizing steel ball 17, spool 40 left ends are equipped with spring 30 and shutoff element, have the left end oil duct 26 of mutual perforation on the

spool

40,27,28, the mutual right oil duct 21 that connects, 20,24 and oil duct 23, concentrating the oil duct 8 that connection 3-position 4-way solenoid directional control valve 2A mouth and spool 40 left oil pockets 10 are arranged on the block 13, the oil duct 9 that is communicated with 3-position 4-way solenoid directional control valve 2A mouth and spool 40 left oil ducts, be communicated with spool 40 left sides, the bypass oil duct 11 of right oil duct, the oil duct 25 that is communicated with spool 40 right oil ducts and oil sump 6, be communicated with spool 40 right oil ducts and retreat the oil duct 22 of relief valve 1, the oil duct 12 that is communicated with 3-position 4-way solenoid directional control valve 2B mouth and spool 40 right oil pockets 44, oil duct 22 communicates with cylinder 37 before the working piston cylinder 38, voltage stabilizing control valve 43 right-hand member pipe joints 14 oil circuits connect working piston cylinder 38 back cylinders 36, and the filler opening of the relief valve 7 that advances communicates with 3-position 4-way solenoid directional control valve 2B mouth and oil duct 12.The diameter of spool 40 is greater than the diameter of voltage stabilizing steel ball 17.The shutoff element 32 is formed by being loaded on to concentrate adjusting silk seat 31, the adjusting screw 45 on the block 13 and block a shot.

The invention has the advantages that and designed a voltage stabilizing control valve, its voltage regulation performance is reliable, and control valve designs in the pressure area that advances, and adopted supercharging mode, and static pressurize 24 hours, dynamically pressurize is 6 hours, pressure surge 2.5MPa has satisfied hydraulic pressure fully and has taken off the needs of liquid technology; The hydraulic element 80% on the original equipment, electrical apparatus element 70% have been reduced, the cancellation complementary energy, make improve 60% the working life of relevant hydraulic pressure and electrical apparatus element, particularly when feed liquor arrives the certain pressure curve, having reduced, the filter plate of bullet (moulding) property distortion is impacted once again, prolonged working life, the year damage percentage of filter plate is reduced to below 5%; The present invention is provided with the strict control of the maximal pressure limit of multichannel oil return and relief valve, and front end housing can not be stressed throughout one's life and burst; The present invention only joins a 3-position 4-way solenoid directional control valve, two relief valves, and a voltage stabilizing control valve is realized voltage stabilizing release, overflow, easy to operate, easy to maintenance, maintenance expenses is low.

Accompanying drawing has provided embodiments of the invention.

Fig. 1 is an embodiment of the invention structural representation;

Fig. 2 is the A-A sectional view of voltage stabilizing control spool of the present invention;

Fig. 3 is a voltage stabilizing control valve cored structure schematic representation of the present invention.

Below in conjunction with accompanying drawing the present invention is described in further detail:

With reference to Fig. 1, present embodiment is by being loaded on the 3-position 4-way solenoid directional control valve of concentrating on the block 13 2, relief valve 7 advances, retreat relief valve 1 and voltage stabilizing control valve 43 compositions, with reference to Fig. 2, Fig. 3, have by central oil passage 27 on the spool 40 of this voltage stabilizing

control valve

43,20, ring shaped

oil passage

28,26,24,23,22 and run through oilhole 41, the 42 left oil ducts that form respectively, right oil duct and ring shaped oil passage 23, plug cock 29 is used at its two ends respectively, 19 shutoff, spool 40 left ends have spring 30, its elastic deformation amount can regulate by being loaded on the adjusting screw 45 of regulating on the silk seat 31, block 32 is loaded on to be regulated on the silk seat 31, spool 40 right-hand members have the sliding pin bar 18 that relies on its end, voltage stabilizing steel ball 17 is loaded on sliding pin bar 18 right-hand members, through being loaded on pressure-stabilizing spring roof pressure on the spring seat 16 on sliding pin bar 18, pipe joint 14 is loaded on to be concentrated on the block 13, concentrating the oil duct 8 that connection 3-position 4-way solenoid directional control valve 2A mouth and spool 40 left end oil pockets 10 are arranged on the block 13, the oil duct 9 that is communicated with 3-position 4-way solenoid directional control valve 2A mouth and spool 40 left oil ducts, the bypass oil duct 11 that is communicated with spool 40 left and right sides oil ducts, the oil duct 25 that is communicated with spool 40 right oil ducts and oil sump 6, be communicated with spool 40 right oil ducts and retreat the oil duct 22 of relief valve 1, the oil duct 12 that is communicated with 3-position 4-way solenoid directional control valve 2B mouth and spool 40 right oil pockets 44, oil duct 22 communicates with cylinder 37 before the working piston cylinder 38, and voltage stabilizing control valve 43 right-hand member pipe joints 14 oil circuits connect working piston cylinder 38 back cylinders 36.

The present embodiment working procedure is as follows:

Start Oil pump electrical machinery 5 and drive oil pumps 3 work, output oil enters 3-position 4-way solenoid directional control valve 2, as any K not electric, the spool of 3-position 4-way solenoid directional control valve 2 can be stagnated intermediateness, output oil process filter 4 oil return ponds 6.

When operating cylinder 38 pistons 39 advance, 2K gets, the action of 3-position 4-way solenoid directional control valve 2 spools, oil enters simultaneously by P mouth, B mouth and advances relief valve 7 and enter voltage stabilizing control valve 43 oil pockets 44 through oil duct 12, promotes spool 40 and moves to left, and after spool 40 arrives the left end working positions voltage stabilizing steel ball 17 is backed down, cylinder 36 after pipe joint 14 oil circuits enter, promote piston 39, start working, reach working pressure.The oil of cylinder 37 can enter left oil duct, oil duct 9 after three four solenoid directional control valve 2A mouths, O mouth oil return pond 6 through oil duct 22, oil duct 23 to bypass oil duct 11 before this moment before spool 40 arrives the left end working positions, after arriving the left end working position, oil can be from

oil duct

22,20,24,25 direct oil return ponds 6, when superpressure, promptly directly from relief valve 1 oil return.

When working piston 39 retreats, 1K gets electric, the spool action, and oil is by the P mouth, the A mouth enters oil duct 8, oil pocket 10 and oil duct 9, promotion spool 40 move to right, and simultaneously, back down voltage stabilizing steel ball 17 through sliding pin bar 18, back cylinder 36 is gone ahead of the rest from oil duct 12 and B mouth, the release of O mouth, the oil of left oil duct enters oil duct 23 cylinder 37 before oil duct 22 enters by bypass oil duct 11, and piston 39 is retreated.When working piston advances, can also can when overflow, manually shut down, can shut down by limit switch when retreating, also can when overflow, manually shut down by electric contact table 33 autostop.

Claims

1. piece is concentrated in a three-position four-way hydraulic voltage stabilizing, it comprises the 3-position 4-way solenoid directional control valve [2] that is loaded on the concentrated block [13], relief valve [7] advances, retreat relief valve [1], it is characterized in that: further comprising the voltage stabilizing control valve [43] that is loaded on the concentrated block [13], the spool [40] of voltage stabilizing control valve [43] is loaded in the valve opening, sliding pin bar [18] right-hand member that relies on the spool [40] is equipped with voltage stabilizing steel ball [17], pressure-stabilizing spring [15] through spring seat [16] roof pressure on voltage stabilizing steel ball [17], spool [40] left end is equipped with spring [30] and shutoff element, have the left end oil duct [26 of mutual perforation on the spool [40], 27,28], the mutual right oil duct [21 that connects, 20,24] and oil duct [23], concentrating the oil duct [8] that connection 3-position 4-way solenoid directional control valve [2] A mouth and the left oil pocket of spool [40] [10] are arranged on the block [13], the oil duct [9] that is communicated with 3-position 4-way solenoid directional control valve [2] A mouth and the left oil duct of spool [40], be communicated with spool [a 40] left side, the bypass oil duct [11] of right oil duct, the oil duct [25] that is communicated with right oil duct of spool [40] and oil sump [6], be communicated with the right oil duct of spool [40] and retreat the oil duct [22] of relief valve [1], the oil duct [12] that is communicated with 3-position 4-way solenoid directional control valve [2] B mouth and the right oil pocket of spool [40] [44], oil duct [22] communicates with the preceding cylinder of working piston cylinder [38] [37], voltage stabilizing control valve [43] right-hand member pipe joint [14] oil circuit connects working piston cylinder [38] back cylinder [36], and the filler opening of the relief valve that advances [7] communicates with 3-position 4-way solenoid directional control valve [2] B mouth and oil duct [12].

2. piece is concentrated in the three-position four-way hydraulic voltage stabilizing according to claim 1, it is characterized in that the diameter of the diameter of spool [40] greater than voltage stabilizing steel ball [17].

3. piece is concentrated in the three-position four-way hydraulic voltage stabilizing according to claim 1, it is characterized in that the shutoff element is made up of the adjusting silk seat [31], adjusting screw [45] and the block [32] that are loaded on the concentrated block [13].