CN2217145Y - Direct action type safety interlocking device controlled by motor - Google Patents

Abstract

The utility model relates to an electromechanical-control direct acting-typed safety interlocking device for a pressure vessel, composed of a mechanical plug dirving device, a lever driving mechanism, and an electric apparatus plug driving device. The device has the characteristics of simple structure, flexible complete machine, high control precision, long service life, low cost, etc. The utility model uses few electronic elements to compensate the pure mechanical control insufficiency, and the operation is safe; when the power is cut off and the electronic elements are out of order, the utility model also has the safety interlocking function.

Description

Electromechanical control direct acting type safety interlock

The utility model relates to a kind of safety installations of pressurized container, especially a kind of direct acting type pressure vessel safety interlock of electromechanical control.

Fast opening type pressure container is blast and overbottom pressure casualty accident because the malfunctioning or workman's misoperation of Displaying Meter causes opening the door often.The immediate cause that causes these accidents is to lack a kind of safety interlock that effectively prevents misoperation.China has microcomputer control now, instrument and meter for automation control and pure these three kinds of safety interlocks of machinery control.Although the first two plants the safety interlocking function that safety interlocking is easily realized code requirement, but these several devices are realized the interlocking action by the external energy, and be subjected under the High Temperature High Pressure working environment, the restriction of China's reliability of electronic components difference, these two kinds all exist poor reliability, life-span is short, cost height, critical defects such as easy break-down.Advantages such as although and pure machinery control has the complete machine flexibility and reliability, cost is low, and the life-span is long, the difficult interlock of realizing code requirement fully.This shows,, be difficult to satisfy standard and user institute requirement, be subjected to certain limitation so it uses to promote although domestic existing safety interlock can play certain safety protection effect.

The purpose of this utility model is exactly that electrical equipment control is the direct acting type safety interlock device of fast opening type pressure container of assisting for the defective face that overcomes the prior art existence provides a kind of machinery to be controlled to be the master.This device can prevent effectively that the fast opening type pressure container band that the malfunctioning and workman's misoperation of Displaying Meter etc. causes from pressing off a blast and overbottom pressure casualty accident.

Technical solution of the present utility model is: it is made up of mechanical pin driver, lever actuated mechanism, electrical equipment bolt driving device, the barrier film of mechanical pin driver is contained between upper flange and the lower flange, ejector pin passes the upper flange pilot hole, be placed on the barrier film, barrier film is communicated with pressurized container by suction tude with the space that lower flange forms, and the upper flange internal surface is processed into arch.

Lever actuated mechanism comprises lever, safety pin, equilibrium block, and safety pin is contained in an end of lever, and the other end is provided with the equilibrium block that its position can left and right adjusting.

Compared with prior art, the utlity model has following advantage and effect: its main interlocking interlock function is realized by the mechanical pin driver, and the mechanical pin driver integrates pressure control valve and action executive component, and be directly to realize interlock by minute-pressure in the container, so the utlity model has simple in structure, novel, complete machine is flexible, the control accuracy height, long service life, low cost and other advantages, it is not enough, safe and reliable that this device compensates pure machinery control by the minute quantity electronic component, having a power failure and electronic component when malfunctioning, still has the safety interlocking effect.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the matching relationship schematic representation of safety pin and pressurized container and quick operating valve in the interlock;

Fig. 2 is the structural representation of mechanical pin driver.

Fig. 3 is a structural representation of the present utility model:

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Between the upper flange 18 and lower flange 16 of mechanical pin driver, adorn a reciprocating barrier film 17, the ejector pin 19 that can pump passes the pilot hole of upper flange, be placed on the barrier film 17, and ejector pin 19 be in lever 3 under, ejector pin can pump along the between centers of upper flange pilot hole, and promotes lever 3 around fixing column 9 swings, and barrier film 17 and lower flange 16 formation cavitys are communicated with by in suction tude 15 and the container; Frame 5 is welded on upper flange 18 tops; Lever 3 passes two rectangular locating slots of frame 5, and is hinged by fixing pin 9 and frame 5; Equilibrium block 4 is fixed on an end of lever 3 by thrust bolt, unclamps thrust bolt, equilibrium block 4 can be on lever 3 move left and right; Safety pin 11 is hinged by fixing pin 10 and lever 3, and lever 3 swings up and down, and can make safety pin insert, withdraw from; Electrical equipment bolt driving device 8 one ends that can pump are fixed on frame 5 tops, and the other end kink is on lever 3, and electrical equipment bolt driving 8 is upwards mentioned and lever 3 can be mentioned.

As shown in Figure 1, when quick operating valve 12 shuts when putting in place by the diagram arrow, on the one hand, feeler lever 13 contacts and shuts the position limit switch 14 that puts in place, and the trip switch 14 closures make 8 energisings of electrical equipment bolt driving device and are ready.On the other hand, cylindrical shell 1 nibble on the circle the latch pilot hole just in time with the hinge last central lines of quick operating valve 12.Send the latch instruction this moment, safety pin 11 can insert.In case safety pin 11 inserts and puts in place, quick operating valve just can not unblank to open the door.And put in place when safety pin withdraws from, quick operating valve 12 can unblank to open the door.

As shown in Figure 2, mechanical pin driver 2 is to utilize barrier film to-and-fro motion principle design, and its barrier film 17 is contained between upper flange 18 and the lower flange 16, and the cavity that barrier film 17 and lower flange 16 forms is communicated with by in suction tude 15 and the container.When the container air inlet boosted to the 0.003MPa minute-pressure, micro pressure gas promoted barrier film 17 and upwards arches upward in the container, and barrier film 17 promoted ejector pin 19 again and rose and put in place this moment.And when the container inner pressure pressure release when being lower than 0.0002MPa, gravity is greater than buoyant gas, ejector pin 19 is with barrier film 17 put in place (shown position) that together descend.Upper flange 18 internal surfaces are made frustoconic shape, and this inner surface configuration approaches barrier film 17 and is subjected to the formed natural arch of minute-pressure.The purpose of doing like this is: one, the to-and-fro motion stroke of restriction barrier film 17; Two, barrier film 17 instrument are reciprocating under the minute-pressure effect, in case the arch that barrier film 17 forms under minute-pressure contacts fully with upper flange 18 internal surfaces fully, at this moment increase pressure, and the tension force of barrier film 17 does not increase.Because barrier film 17 is only reciprocating under the minute-pressure effect, and when proper functioning, barrier film 17 suffered membrane stresses are minimum, so it is big that this mechanical pin driver is suitable for pressure range, and its pressure controling precision is not influenced by the working pressure size.This point is better than the electrical equipment pressure control valve.

As shown in Figure 3, when shutter 12 shuts when putting in place, electrical equipment bolt driving device 8 is ready, send this moment and insert instruction, electrical equipment bolt driving device 8 is mentioned lever 3, and lever 3 puts safety pin 11 insertions in place, and contact safety pin and insert the position limit switch 7 that puts in place, make its normally open contact closure.Now send the air inlet instruction, at this moment suction valve can start, and container can boost in air inlet.Above-mentioned interlocking interlock function can guarantee that quick operating valve 12 shuts and put in place, and safety pin 11 insert put in place after, can carry out the air inlet boost operations.

When container inner pressure rose to about 0.003MPa, ejector pin 19 jack-up of mechanical pin driver 2 put in place, and this moment, ejector pin 19 contacted the ejector pin position limit switch 6 that puts in place, made the trip switch normally open contact close electrical equipment bolt driving device 8.After this, safety pin 11 is inserted into the bit motion instrument by the mechanical pin driver control.Safety pin 11 unblanks to have the dual fail-safe interlock after inserting and putting in place: one, and safety pin 11 inserts to put in place and can prevent that the quick operating valve band from pressing off lock; Its two, when safety pin 11 was in the insertion state, mistake was nibbled motor and is inserted the position limit switch normally closed interlock that puts in place by safety pin and pin, and can not unblank.Having a power failure or electronic component when malfunctioning so this device has both made, mechanical pin driver 2 still has the anti-safety interlocking function that presses off lock of being with.

When the need parking is opened the door, must start outlet valve earlier, container inner pressure is let out to being lower than 0.0002MPa (about 2cmH ₂O), the ejector pin of mechanical pin driver 2 19 descends and puts in place, and at this moment lever 3 is owing to lay particular stress on imbalance, puts in place and safety pin 11 withdrawed from.Withdraw from put in place after, safety pin inserts the position limit switch normally closed interlock closure that puts in place, send unlock instruction this moment, mistake is nibbled motor can carry out unlocking action.After unblanking to put in place, can open the door.This interlock can prevent that overbottom pressure has not discharged as yet in the container, just carries out unlock operation, and this can stop the overbottom pressure casualty accident.

Claims (2)

1, a kind of electromechanical control direct acting type safety interlock, it is made up of mechanical pin driver, lever actuated mechanism, electrical equipment bolt driving device, it is characterized in that: the barrier film (17) of mechanical pin driver (2) is contained between upper flange (18) and the lower flange (16), ejector pin (19) passes the upper flange pilot hole, be placed on the barrier film, barrier film is communicated with pressurized container (1) by suction tude (15) with the space that lower flange forms, and the upper flange internal surface is processed into arch.

2, a kind of electromechanical control direct acting type safety interlock according to claim 1, it is characterized in that: lever actuated mechanism comprises lever (3), safety pin (11), equilibrium block (4), safety pin is contained in an end of lever, and the other end is provided with the equilibrium block that its position can left and right adjusting.

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