CN2256349Y

CN2256349Y - Controlling cold-strip steel centring device

Info

Publication number: CN2256349Y
Application number: CN 96212795
Authority: CN
Inventors: 聂松林
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-01
Filing date: 1996-06-01
Publication date: 1997-06-18
Anticipated expiration: 2006-06-01

Abstract

The utility model relates to a controlling cold-strip steel centring device, comprising a swinging roller making a strip steel doing a rectilinear motion convert moving the direction of the motion. The utility model is characterized in that the controlling cold-strip steel centring device is provided with two sensors, the contacts of which are respectively positioned on both sides of the strip steel, a hydraulic cylinder is connected with one end of the swinging roller through the extending end of a piston rod of the hydraulic cylinder, the swinging roller driven to rotate by the strip steel drives a hydraulic pump to rotate through a speed increaser, and the utility model is provided with a non-opening three-position four-way reversing valve for distributing pressure oil outputted by the hydraulic pump to the hydraulic cylinder according to centring signals collected by the sensors so as to operate the swinging roller opposite to a centring direction to rotate.

Description

The device of control cold-strip steel sideslip

The utility model relates to a kind of device of controlling the cold-strip steel sideslip.

In the cold rolling industry of metallurgy, technological requirement based on units such as pickling, tandem rolling, zinc-plated, zinc-plated, continuous annealings, when unit import and export section is with steel (stop and carry out) to go up volume, straight peen, shearing, welding point and is unloaded operation such as volume, for the band steel that makes the unit interlude still can move continuously, looper must be installed to store enough band steel, the existing horizontal kink dolly of many employings keeps constant strip tension.But owing to reasons such as unit equipment installation accuracy, roll wear, unit speed and belt plate shapes, during operation, the band steel can produce deviation phenomenon.At this problem, external some similar unit is equipped with electricity, liquid type or gas, liquid type strip running deviation control device, and need photoelectricity or PCU, its power stage oil sources is by motor-driven, like this, the kink dolly just must attach cable, and both inconvenience was also dangerous owing to be with cable movement, therefore, existing kink dolly is not in fact all installed this class running deviation control device.Speed height, displacement length and previous reasons when yet horizontal kink dolly fills cover and puts cover, the band steel sideslip can occur inevitably, influences strip quality, damage unit equipment, even causes broken belt.

For this reason, the purpose of this utility model provides a kind of device of controlling the cold-strip steel sideslip.It can control strip running deviation and not subsidiary again any cable effectively.

The technical scheme that realizes the utility model purpose is: a kind of device of controlling the cold-strip steel sideslip, the oscillating roller that comprises the band steel converting motion direction that makes moving linearly, its distinctive feature is: have two sensors, the contact of two sensors lays respectively at the both sides of band steel, hydraulic cylinder links to each other with an end of oscillating roller by the external part of its piston rod, the oscillating roller that is dragged rotation by the band steel drives the hydraulic pump running through a speed increaser, and has a pressure oil of hydraulic pump being exported according to the offset signals of sensor collection to be assigned to hydraulic cylinder to handle the zero lap three position four-way directional control valve that oscillating roller rotates against the sideslip direction.

And, sensor is the pilot valve of reversal valve, the oil-in of each pilot valve links to each other with two control ports of reversal valve respectively and connects the oil-in of reversal valve simultaneously and connect hydraulic pump through a check valve, the oil return opening of two pilot valves connects the oil return opening and the oil sump of reversal valve simultaneously, two actuator ports of reversal valve connect the upper and lower cavity of hydraulic cylinder respectively, other has the hydraulic pump of an accumulator compensation circuit and serial connection and check valve mutually and connect, and is connected to an overflow valve that leads to oil sump between hydraulic pump and check valve.

And, the spool of zero lap three position four-way directional control valve is three shoulders, four groove structures, the spring that is positioned at the spool both sides makes spool be in the centering position, on middle shoulder, have 1 or 2 radially throttle orifice, axially the control port with the spool two ends links to each other this throttle orifice warp with radial hole, and the radial hole of axially extending bore on the oil return shoulder at place, spool axle center is connected with oil return opening.

And, pilot valve has two inner chambers in length and breadth that connect mutually, advance, oil return opening respectively with intracavity inter-connection in length and breadth, the middle part of spool is a piston, its tapered tail is positioned at the intersection of inner chamber in length and breadth, the tail end of spool is provided with back-moving spring, and the external part of spool is connecting a contact that is made of connecting rod, pulley with microgroove.

And the speed ratio of speed increaser is 10～15: 1.

In the technical program,, be the external power-free input and need not subsidiary cable because hydraulic pump drives through a speed increaser by oscillating roller.The contact of described sensor is directly arranged in the both sides of band steel, during work, as long as the band steel departs from the center and just can collide contact, reversal valve is just action immediately after receiving the offset signals of sensor, the pressure oil that is about to hydraulic pump output is assigned to going up or cavity of resorption of hydraulic cylinder, oscillating roller is rotated, so the band steel is just got back to the center under the effect of tension force against the sideslip direction.The utility model need not outer power and control apparatus spare, does not need cabling, and has energy-conservation, processing and advantage such as reliable easily.

The utility model is described in further detail below with reference to accompanying drawing.

Fig. 1 is the whole schematic diagram that constitutes of the utility model.

Fig. 2 is the cutaway view of reversal valve.

Fig. 3 is the profile at Fig. 2 A-A place.

Fig. 4 is the cutaway view of pilot valve.

With reference to Fig. 1～Fig. 4, the utility model comprises: make the oscillating roller 6 of the band steel 7 converting motion directions of moving linearly, be about to be with steel 7 covers on oscillating roller 6.

This device has two sensors 8, the contact of two sensors 8 was located at the both sides of band steel 7 in 10 minutes, hydraulic cylinder 1 links to each other with an end of oscillating roller 6 by the external part of its piston rod 4, the oscillating roller 6 that quilt is with steel 7 to drag rotation drives hydraulic pumps 18 runnings through a speed increaser 19, and (speed ratio is 10～15: 1), and the pressure oil that has an offset signals of gathering according to sensor 8 that hydraulic pump 18 is exported is assigned to the zero lap three position four-way directional control valve 13 that hydraulic cylinder 1 rotates against the sideslip direction with manipulation oscillating roller 6.

Further scheme is, sensor 8 comes down to the pilot valve 9 of reversal valve 13, the oil-in 12 of each pilot valve 9 links to each other with two control port C1, C2 of reversal valve 13 respectively, and connect the oil inlet P of reversal valve 13 simultaneously and connect hydraulic pump 18 through a check valve 16, the oil return opening 11 of two pilot valves 9 connects the oil return inlet T and the oil sump 21 of reversal valve 13 simultaneously, and two actuator port A, B of reversal valve 13 connect the upper and

lower cavity

2,3 of hydraulic cylinder 1 respectively.Wherein: can also establish a filter 17 between hydraulic pump 18 and the check valve 16.In order to absorb or to compensate fluctuation in the hydraulic circuit, can establish an accumulator 15 compensation circuits 14, the hydraulic pump 18 of this loop and serial connection and check valve 16 are mutually and connect.Be connected to an overflow valve 20 that leads to oil sump 21 in addition between hydraulic pump 18 and check valve 16, when the spool 28 of reversal valve 13 mediates (the band steel is positioned at the centre position), the pressure oil of hydraulic pump 18 outputs returns oil sump 21 through described overflow valve 20.

The spool 28 of described zero lap three position four-way directional control valve 13 is three shoulders, four groove structures, and so-called " zero lap " means that the middle shoulder 29 of spool 28 is identical with the width of annular groove in the middle of the corresponding valve body.The spring 22 that is positioned at spool 28 both sides makes spool 28 be in the centering position, on middle shoulder 29, have 1 or 2 radially throttle orifice R, this throttle orifice R is connected with control port C1, the C2 at spool 28 two ends through axial and

radial hole

26,25, and the radial hole 23 of axially extending bore 27 on oil return shoulder 24 at place, spool 28 axle center is connected with oil return inlet T.Wherein, the diameter of throttle orifice R can be 0.5mm; The diameter of axially extending bore 27 and the radial hole 23 that communicates with it all can be 10mm.

Described pilot valve 9 has two inner chambers in length and breadth 32,31 that connect mutually, oil inlet and

oil return mouth

12,11 is connected with inner chamber 32,31 in length and breadth respectively, the middle part of spool 30 is a piston 33, its tapered tail 37 (cone angle can be got 23 °～25 °) is positioned at the intersection of inner chamber 32,31 in length and breadth, the tail end of spool 30 is provided with back-moving spring 36, and the external part of spool 30 is connecting a contact 10 that is made of connecting rod 34, pulley 35 with microgroove 38.

During operation, if band steel 7 departs from the center to moving to left, the pulley 35 (contact of sensor) of the pilot valve 9 of this side just can be collided in the left side of band steel 7, spool 30 is promptly opened (its tapered tail is left the intersection of inner chamber in length and breadth), the hydraulic oil of reversal valve 13 left ends advances through pilot valve 9, oil return opening 12,11 flow to the oil back chamber of reversal valve 13, like this, reversal valve 13 spools 28 are moved to the left under differential pressure action, oil inlet P (hydraulic oil) is linked up with actuator port B, actuator port A and oil return inlet T are linked up, hydraulic cylinder 1 is under the effect of pressure oil, drive oscillating roller 6 around its radially centre of gyration 5 clockwise directions rotation, band steel 7 just moves right under the tension force effect, gets back to the centre position up to the pulley 35 that the left side of band steel 7 is left on the pilot valve 9.In like manner, move right if band steel 7 departs from the center, its working method is just in time with above-mentioned opposite.

Claims

1, a kind of device of controlling the cold-strip steel sideslip, comprise: the oscillating roller [6] that makes band steel [7] the converting motion direction of moving linearly, it is characterized in that: have two sensors [8], the contact [10] of two sensors [8] lays respectively at the both sides of band steel [7], hydraulic cylinder [1] links to each other with an end of oscillating roller [6] by the external part of its piston rod [4], the oscillating roller [6] that quilt band steel [7] drags rotation drives hydraulic pump [18] running through a speed increaser [19], and the pressure oil that has an offset signals of gathering according to sensor [8] that hydraulic pump [18] is exported is assigned to hydraulic cylinder [1] to handle the zero lap three position four-way directional control valve [13] that oscillating roller [6] rotates against the sideslip direction.

2, device according to claim 1, it is characterized in that: sensor [8] is the pilot valve [9] of reversal valve [13], the oil-in [12] of each pilot valve [9] respectively with two control port [C1 of reversal valve [13], C2] linking to each other also connects the oil-in [P] of reversal valve [13] simultaneously and connects hydraulic pump [18] through a check valve [16], the oil return opening [11] of two pilot valves [9] connects the oil return opening [T] and the oil sump [21] of reversal valve [13] simultaneously, two actuator port [A of reversal valve [13], B] connect the upper and lower cavity [2 of hydraulic cylinder [1] respectively, 3], other has the hydraulic pump [18] of an accumulator [15] compensation circuit [14] and serial connection and check valve [16] mutually and connect, and is connected to an overflow valve [20] that leads to oil sump [21] between hydraulic pump [18] and check valve [16].

3, device according to claim 2, it is characterized in that: the spool [28] of zero lap three position four-way directional control valve [13] is three shoulders, four groove structures, the spring [22] that is positioned at spool [28] both sides makes spool [28] be in the centering position, on middle shoulder [29], have 1 or 2 radially throttle orifice [R], this throttle orifice [R] is connected with the control port [C1, C2] at spool [28] two ends through axial and radial hole [26,25], and the radial hole [23] of axially extending bore [27] on oil return shoulder [24] at place, spool [28] axle center is connected with oil return opening [T].

4, according to claim 2 or 3 described devices, it is characterized in that: pilot valve [9] has two inner chambers in length and breadth [32,31] that connect mutually, advance, oil return opening [12,11] is connected with inner chamber [32,31] in length and breadth respectively, the middle part of spool [30] is piston [33], its tapered tail [37] is positioned at the intersection of inner chamber [32,31] in length and breadth, the tail end of spool [30] is provided with back-moving spring [36], and the external part of spool [30] is connecting a contact [10] that is made of connecting rod [34], pulley [35] with screw thread [38].

5, device according to claim 4 is characterized in that: the speed ratio of speed increaser [19] is 10～15: 1.