A kind of constant force cylinder valve emergency shutdown system
Technical field
The present invention relates to the gas cylinder technical field, relate in particular to a kind of constant force cylinder valve emergency shutdown system for canned hazardous gas steel cylinder.
Background technique
In the municipal administration of the canned hazardous gas of present domestic use steel cylinder, the chemical industry, because hazardous gas not only has toxicity, explosion hazard, also has severe corrosive, cause pipeline and equipment in the system seepage or leakage to occur, parts need frequent dismounting and change, even break, and can cause a large amount of leakages.Therefore, industry has strict demand to transportation, storage and the use of hazardous gas, and has formulated corresponding safety standard and safety measure, to avoid or to reduce the person, property loss.
The general procedure of processing hazardous gas spillage is: when indoor generation gas leakage accident, the emergency processing personnel need to dress siren suit in the place (outdoor) of safety, put on resuscitation apparatus and enter the gas leakage scene, close first the valve on the gas cylinder, cut off dangerous matter sources, the people withdraws from the room again, falls by the gas treatment that the gas leakage neutralising arrangement will leak, and the people also checks spot failure in the return chamber again.In the practical operation, since operator to the fear of toxic and harmful, have nervous psychology, subjectivity thinks that the valve of closing on the gas cylinder is more tight better, cause operational torque much larger than specified value, damaged artificially unconsciously cylinder valve, can again operate leakage accident when serious, cause the loss of personnel's life and business property; What is more, in breaking out of fire with the place of explosion risk is arranged, can only take passive quarantine measures, can't cut off dangerous matter sources from the source, and consequence is even more serious.
The present another kind of measure of processing the canned hazardous gas spillage of steel cylinder both domestic and external proposes pneumatic valve to be installed gathering steel pipe, and when gas leakage occured, instantaneous closing gathered the steel pipe valve, makes hazardous gas no longer enter follow-up equipment.This cover pneumatic valve can effectively solve gathering the problem of leaking behind the steel pipe, but in recurrent leakage before gathering steel pipe, when occuring such as urgencies such as the perishable parts that easily go wrong most break, can't in time close dangerous matter sources, and make this processing invalid.
Summary of the invention
Deficiency for the prior art existence, the object of the present invention is to provide a kind ofly be directly installed on the cylinder valve, and can be by the emergency shutdown system of remote control, in case the discovery hazardous gas spillage can cut off the hazardous gas source quickly and accurately, stop to leak to enlarge.
For achieving the above object, technological scheme of the present invention is: a kind of constant force cylinder valve emergency shutdown system, it comprises control unit and shutoff device, described shutoff device is installed on the cylinder valve of canned hazardous gas steel cylinder, described control unit is installed away from described shutoff device, by electronic or pneumatic mode, controls described shutoff device, make described shutoff device produce the constant moment of closing, close cylinder valve.
Preferably, shutoff device comprises Power Component, transmitting assemblies and fixing-assembly, and transmitting assemblies connects respectively Power Component and fixing-assembly, and the successively coaxial direction assembling of Power Component, transmitting assemblies and fixing-assembly, forms the tubbiness ectosome.
Preferably, control unit comprise control unit with its monitoring unit that is connected respectively, alarm unit, danger button, described monitoring unit, alarm unit are used for finding dangerous information, in case dangerous information occurs, control unit sends the corresponding actions instruction to described shutoff device, control Power Component output constant moment is finished transmitting assemblies to close the action of gas cylinder valve.
Compared with prior art, the technique effect of technical solution of the present invention is: constant force cylinder valve emergency shutdown system of the present invention can be under the condition that does not change existing equipment, directly be installed on shutoff device on the cylinder valve, by the control unit output of installing away from gas cylinder, produce constant moment loading on cylinder valve, close quickly and accurately cylinder valve, prevent hazardous gas to continue to enlarge.In the operation, personnel do not need to enter the deathtrap, have protected personal security, have reduced device damage, have reduced the environmental pollution that hazardous gas spillage causes.The successively coaxial direction assembling of Power Component, transmitting assemblies and fixing-assembly forms the tubbiness ectosome, and is light and handy compact, is fit to little space and uses.In the municipal administration of using the hazardous gases such as poisonous and harmful, chemical industry, a kind of new measure that toxic and harmful leaks of processing has been proposed.
Description of drawings
Below with reference to drawings and Examples the present invention is described in further detail, this embodiment only is used for explaining the present invention.Protection scope of the present invention is not construed as limiting.
Fig. 1 is the structural representation of the shutoff device of the electronic pattern of the present invention;
Fig. 2 is the structural representation of the shutoff device of the pneumatic pattern of the present invention;
Fig. 3 is the control principle block diagram of system of the present invention.
Label symbol among the figure:
The 1-gas cylinder; The 2-cylinder valve; 3-gas cylinder valve rod; The 4-Power Component; The 5-motor;
The 6-pneumatic motor; The 7-speed reducer; The 7`-speed reducer; The 8-main shaft; 9-connecting shaft spare;
10-crosses the moment guard member; 11-connects valve member; 12-anchor clamps fixing frame; 13-cylinder valve anchor clamps;
The 14-eccentric wheel assembly.
Embodiment
Constant force cylinder valve emergency shutdown system of the present invention comprises control unit and shutoff device, and the effect of shutoff device is under the control of control unit, provides the constant torsional moment of closing to gas cylinder valve, the emergency cut-off cylinder valve, therefore the blocking-up dangerous gas source, is the actuator of system.In actual the use, different hazardous gas steel cylinders uses the valve of different moment of torsion standards and different size.Shutoff device of the present invention can adopt the structural type of electric actuator or pneumatic actuator, and it is that system of the present invention adapts to one of measure of different usage requirements.
Fig. 1 illustrates the structure of the shutoff device of electronic pattern, and shutoff device comprises Power Component 4, transmitting assemblies and fixing-assembly, and transmitting assemblies connects Power Component 4 and fixing-assembly.The successively coaxial direction assembling of Power Component 4, transmitting assemblies and fixing-assembly forms the tubbiness ectosome.Power Component comprises as the motor 5 of actuating member and connected speed reducer 7; transmitting assemblies comprise main shaft 8 and with the connecting shaft spare 9 of its interlock, cross moment guard member 10, connect valve member 11, fixing-assembly comprises anchor clamps fixing frame 12 and the cylinder valve anchor clamps 13 that are fixedly connected with it and eccentric wheel assembly 14.
Connect valve member 11 and be socketed on the gas cylinder valve rod 3, make cylinder valve anchor clamps 13 clamp cylinder valve 2 by eccentric wheel assembly 14, thereby realize that shutoff device directly is installed on the cylinder valve 2 of gas cylinder 1.Wherein, connect valve member 11 and can adopt a kind of universal connector to be connected with cylinder valve 2, when transmitting assemblies and valve shaft decentraction, also can connect fast also and the moment of torsion transmission loss can be reduced to minimum.In addition, the effect of cylinder valve anchor clamps 13 is to clamp cylinder valve 2, can adopt yoke pincers valve arrangement, the cylinder valve 2 of corresponding different size, only need to revise corresponding yoke pincers, and can shutoff device be clipped on the cylinder valve 2 quickly and easily by eccentric wheel assembly 14, and other mechanism of shutoff device can unify typing.It is another measure that system of the present invention adapts to different usage requirements.
Fig. 2 is the structure of the shutoff device of the pneumatic pattern of the present invention, the pneumatic actuator pattern, be applicable to the cylinder valve of the explosive class gas of can, shutoff device comprises Power Component 4, transmitting assemblies and fixing-assembly, and Power Component 4 comprises as the pneumatic motor 6 of actuating member and connected speed reducer 7`.Other parts composition is identical with the shutoff device of electronic pattern with annexation, repeats no more herein.
As shown in Figure 3, the control unit of system of the present invention, comprise control unit with its monitoring unit that is connected respectively, alarm unit, danger button.Monitoring unit and alarm unit are used for finding and transmitting dangerous information, in case dangerous information occurs, by manually/automated manner starts danger button or directly sends instruction by monitoring unit, start control unit, like this, control unit just can after receiving the signal that arbitrary triggering assembly (monitoring unit or alarm unit) provides, be opened output immediately.
Control unit can adopt the pattern of control electric actuator or control pneumatic actuator.The pattern of control electric actuator is the motor 5 output steady currents to electric actuator, makes electric actuator produce constant moment.The pattern of control pneumatic actuator is to start the source of the gas solenoid valve that is communicated with pneumatic actuator, through regulating.Make pneumatic actuator produce constant moment.
Control procedure:
The control procedure of electronic mode: in the time of need to closing cylinder valve 2, the power-on passage, motor 5 operations of connecting electric actuator, the control electric current is steady state value, what guarantee motor 5 outputs is constant moment.Pass to transmitting assemblies through speed reducer 7, be applied on the cylinder valve 2 of being clamped by cylinder valve anchor clamps 13 by transmitting assemblies, finish the action of closing gas cylinder valve.
The control procedure of pneumatic mode: in the time of need to closing cylinder valve 2, the power-on passage, connect the solenoid valve on the gas piping, gas is entering pneumatic motor 6 through after the pressure regulation, and like this, pneumatic motor 6 is under the action of gas source of constant pressure and flow, export constant moment of rotation, 7` passes to transmitting assemblies through speed reducer, is applied on the cylinder valve 2 of being clamped by cylinder valve anchor clamps 13 by transmitting assemblies, finishes the action of closing gas cylinder valve.
In order to guard against the control unit output current out of control; the present invention arranged the moment guard member in transmitting assemblies; when the torque force overload of transmitting assemblies transmission; cross the connection of moment guard member disengaging transmitting assemblies and gas cylinder closing axle; make the overload moment of torsion not be delivered on the gas cylinder valve; guaranteeing that the moment of closing that outputs to cylinder valve is no more than the moment that cylinder valve can bear.
In addition, the alarm unit of the control unit of system of the present invention also provides acoustooptic alarm and long-range output alarm signal.
Steady current or the atmospheric pressure value of control unit output of the present invention can be regulated, as required to adapt to the moment of closing of different gas cylinder valves.
Except above-mentioned example, the present invention can also have other mode of executions, and all employings are equal to the technological scheme of replacement or equivalent transformation form, all within protection scope of the present invention.