CN103742482A - Pneumatic locking mechanism for hydraulic cylinder of crystallizer and application method thereof - Google Patents

Abstract

The invention relates to a pneumatic locking mechanism of a crystallizer hydraulic cylinder, which includes a housing, an air inlet, a reversing valve, a piston, a pressure sleeve, an opening locking sleeve, an exhaust port and a disc spring. There is an air inlet, and the other end is provided with an exhaust port. The outer end of the air inlet is connected to the reversing valve. From the air inlet end, the inside of the shell is equipped with a piston, a pressure sleeve and a disc spring in sequence. The pressure sleeve conical surface It is in contact with the opening locking sleeve on the shell, and the opening locking sleeve is in contact with the piston rod of the hydraulic cylinder. Compared with the existing technology, the beneficial effect of the present invention is that it has the characteristics of simple structure, convenient installation, high control precision, scientific and practical, and when the locking force is selected properly, the position of the crystallizer copper plate can be controlled, that is, crystallization The taper of the device is controllable, which avoids the phenomenon of "running cone" caused by hydraulic pipeline leakage, hydraulic valve group failure, hydraulic cylinder leakage and other reasons.

Description

Pneumatic locking mechanism of crystallizer hydraulic cylinder and its application method

technical field

The invention relates to the technical field of converter steelmaking technology, in particular to a mold hydraulic cylinder pneumatic locking mechanism and a use method thereof.

Background technique

In order to meet the requirements of hot rolling process for different slab widths, the continuous casting crystallizer is equipped with a narrow surface width adjustment device. At the same time, in order to reduce the cold-state width adjustment time of online shutdown and improve the operation rate of the continuous casting machine, it is generally adopted to adjust the slab width during the pouring process (ie, online hot-state width adjustment).

The crystallizer width adjustment transmission mode generally adopts the combination of trapezoidal screw nut, planetary ball screw, worm gear and ball screw, etc. Among them, the trapezoidal screw nut width adjustment technology: has self-locking function, but there is mechanical clearance; planetary Ball screw: the mechanism itself has no self-locking function; the combination of worm gear and ball screw: has self-locking function, but the mechanism is complicated; hydraulic cylinder width adjustment: linear transmission of magnetic ruler mechanism, no reciprocating cumulative error, accurate positioning, but There is no mechanical locking function, and the phenomenon of "running cone" is easy to occur during the production process.

Contents of the invention

The purpose of the present invention is to provide a mold hydraulic cylinder pneumatic locking mechanism and its application method.

To achieve the above object, the present invention adopts the following technical solutions:

A pneumatic locking mechanism for a crystallizer hydraulic cylinder, including a housing, an air inlet, a reversing valve, a piston, a pressure sleeve, an opening locking sleeve, an exhaust port and a disc spring, and one end of the housing is provided with an air inlet The other end is provided with an exhaust port, and the outer end of the air inlet is connected to the reversing valve. From the air inlet end, the inside of the shell is provided with a piston, a pressure sleeve and a disc spring in sequence, and the conical surface of the pressure sleeve and the shell The opening locking sleeve on the upper part is in contact, and the opening locking sleeve is in contact with the piston rod of the hydraulic cylinder.

A method for using a mold hydraulic cylinder pneumatic locking mechanism, comprising the following steps:

1) A locking mechanism is installed on the piston rod of the hydraulic cylinder, and the air inlet is connected to the air pump through a reversing valve;

2) When adjusting the width, "unlock" the piston rod of the hydraulic cylinder first, and delay for 3 seconds. When the air inlet is fed with pressure gas, the high-pressure gas pushes the piston to move, and the piston pushes the pressure sleeve to move, and the disc spring is compressed at the same time , the gas in the disc spring chamber is discharged through the exhaust port, the pressure applied by the pressure sleeve on the opening locking sleeve is released, and the force of the opening locking sleeve clamping the piston rod of the hydraulic cylinder is also released, and the piston rod is in the "unlocked" state , and then realize the change of billet section;

3) When the adjustment reaches the set value, it first enters the "locked" state, and the delay is 3 seconds. When the reversing valve is in the unloaded state, the pressure sleeve moves under the action of the disc spring, and is tightened by the cone surface of the pressure sleeve. Press the open locking sleeve tightly on the piston rod of the hydraulic cylinder for widening adjustment, and the piston rod is in a "locked" state at this time, thereby realizing that the piston rod of the hydraulic cylinder remains at the set position.

Compared with prior art, the beneficial effect of the present invention is:

A crystallizer hydraulic cylinder pneumatic locking mechanism and its use method have the characteristics of simple structure, convenient installation, high control precision, scientific and practical, etc., under the condition that the locking force is selected properly, the position of the crystallizer copper plate can be controlled, that is, crystallization The taper of the device is controllable, which avoids the phenomenon of "running cone" caused by hydraulic pipeline leakage, hydraulic valve group failure, hydraulic cylinder leakage and other reasons.

Description of drawings

Fig. 1 is a structural diagram of the present invention;

Fig. 2 is a working state diagram of the present invention.

1—housing 2—intake port 3—reversing valve 4—piston 5—pressure sleeve 6—opening locking sleeve 7—exhaust port 8—disc spring 9—piston rod

Detailed ways

The specific embodiment of the present invention is further described below in conjunction with accompanying drawing:

As shown in Figure 1, a pneumatic locking mechanism of a crystallizer hydraulic cylinder in the present invention includes a housing 1, an air inlet 2, a reversing valve 3, a piston 4, a pressure sleeve 5, an opening locking sleeve 6, and an exhaust port 7 and disc spring 8, one end of the housing 1 is provided with an air inlet 2, and the other end is provided with an air outlet 7, and the outer end of the air inlet 2 is connected with the reversing valve 3, from the air inlet 2 end At the beginning, the inside of the housing 1 is provided with a piston 4, a pressure sleeve 5 and a disc spring 8 in sequence. touch.

As shown in Figure 1 and Figure 2, the using method of the present invention comprises the following steps:

1) Install a locking mechanism on the piston rod 9 of the hydraulic cylinder, and the air inlet 2 is connected to the air pump through the reversing valve 3;

2) When adjusting the width, first "unlock" the piston rod 9 of the hydraulic cylinder, and delay for 3 seconds. When the air inlet 2 is fed with pressure gas, the high-pressure gas pushes the piston 4 to move, and the piston 4 pushes the pressure sleeve 5 to move. At the same time, the disc spring 8 is compressed, and the gas in the disc spring 8 chambers is discharged through the exhaust port 7. The pressure applied by the pressure sleeve 5 on the opening locking sleeve 6 is released, and the force of the opening locking sleeve 6 clamping the hydraulic cylinder piston rod 9 also follows. When it is released, the piston rod 9 is in the "unlocked" state at this time, and then the change of the billet section is realized;

3) When the adjustment reaches the set value, it first enters the "locked" state, and the delay is 3 seconds. When the reversing valve 3 is in the unloading state, the pressure sleeve 5 moves under the action of the disc spring 8, and passes through the pressure sleeve 5. The conical surface tightly presses the opening locking sleeve 6 on the piston rod 9 of the width-adjusting hydraulic cylinder. At this time, the piston rod 9 is in a "locked" state, and then the hydraulic cylinder piston rod 9 is kept at the set position.

Its control method is shown in the table below:

The above is only the basic principle of the present invention, and does not limit the present invention in any way. All equivalent changes and modifications according to the present invention are within the scope of the technical protection scheme of this patent.

Claims (2)

1. a crystallizer hydraulic cylinder pneuma-lock mechanism, it is characterized in that, comprise housing, suction port, selector valve, piston, gland, opening lock sleeve, relief opening and dish spring, described housing one end is provided with suction port, the other end is provided with relief opening, and the outer end of suction port is connected with selector valve, starts enclosure interior be provided with successively piston, gland and dish spring from suction port end, the gland conical surface contacts with the opening lock sleeve on housing, and opening lock sleeve contacts with hydraulic cylinder piston rod.

2. the using method of a kind of crystallizer hydraulic cylinder pneuma-lock according to claim 1 mechanism, is characterized in that, comprises the following steps:

1) on the piston rod of adjusting wide oil hydraulic cylinder, locking mechanism is installed, suction port is connected with air pump by selector valve;

2) adjust when wide and first hydraulic cylinder piston rod is carried out to " release ", 3 seconds of time delay, when suction port passes into pressed gas, pressurized gas promote piston and move, and piston promotes gland again and moves, dish spring is compressed simultaneously, dish spring chamber gas is discharged by relief opening, and gland is applied to the pressure that opening locking puts and is disengaged, and the power of the tight hydraulic cylinder piston rod of opening locking cartridge clip is also removed thereupon, at this moment piston rod is in " release " state, and then realizes the change of casting blank section;

3) when reaching setting value, adjustment is introduced into " locking " state, 3 seconds of time delay, when selector valve is during in unloading condition, gland moves under the effect of dish spring, by the gland conical surface, tightly opening being locked to casing pressure is tightly adjusting on the piston rod of wide oil hydraulic cylinder, at this moment piston rod is in " locking " state, and then realizes hydraulic cylinder piston rod and remain on desired location.

Images