CN114507106A - Metering device and control method for inflammable and explosive medicament - Google Patents
Metering device and control method for inflammable and explosive medicament Download PDFInfo
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- CN114507106A CN114507106A CN202210226866.9A CN202210226866A CN114507106A CN 114507106 A CN114507106 A CN 114507106A CN 202210226866 A CN202210226866 A CN 202210226866A CN 114507106 A CN114507106 A CN 114507106A
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
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Abstract
The embodiment of the invention provides a metering device and a control method of a flammable and combustible medicament, which comprises the following steps: the hopper is used for storing inflammable and explosive agents; the first plate is provided with a medicine loading hole, and the medicine loading hole is communicated with a discharge hole of the hopper; the metering plate is provided with a metering hole and is arranged between the first plate and the second plate in a sliding manner so that one end of the metering hole is communicated with the medicine loading hole at a first position or the other end of the metering hole is communicated with the medicine leakage hole at a second position when the metering plate slides; the second plate is provided with a medicine leakage hole; and the power device is connected with the metering plate to drive the metering plate to slide, and the force generated when the power device drives the metering plate to slide is larger than the force required by the reciprocating sliding of the metering plate between the first position and the second position and smaller than the force required by the metering plate to pull and burn the stuck medicament. The embodiment of the invention avoids the defect that the medicament stuck when the metering plate moves is ignited by pulling.
Description
Technical Field
The invention relates to a metering device and a control method for an inflammable and explosive medicament.
Background
In the metering production of explosive medicaments, gunpowder, ammunition and the like or small granular explosive medicaments which are easy to burn and explode, the metering plate adopting the volumetric principle has the advantages of high speed and quick production in an easy-to-group mode. However, in the existing metering production of the flammable and explosive medicaments, a mode of directly and simply driving a metering plate by a cam and other mechanical transmission or an air cylinder is generally adopted, due to the lack of detection or timely processing of the abnormality of medicament clamping and the like in the medicament pulling process, the medicaments are very easy to be pulled and burnt when the abnormality of medicament clamping and the like occurs, even explosion is caused, and serious potential safety hazards are caused to the safety of personnel and equipment.
Disclosure of Invention
In order to solve the technical problem that flammable and explosive medicaments are easy to be ignited in the medicament drawing process in the prior art, the embodiment of the invention provides a metering device and a control method of the flammable and explosive medicaments.
The embodiment of the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a metering device for a flammable and combustible medicament, including:
the hopper is used for storing inflammable and explosive agents;
the first plate is provided with a medicine loading hole, the medicine loading hole is communicated with a discharge hole of the hopper, and the medicine loading hole is communicated with one end of the metering hole when the metering hole slides to a first position and is closed by the second plate at the same time;
the metering plate is provided with a metering hole and is arranged between the first plate and the second plate in a sliding manner so that one end of the metering hole is communicated with the medicine loading hole at a first position or the other end of the metering hole is communicated with the medicine leakage hole at a second position when the metering plate slides;
a second plate provided with a medicine leakage hole for communicating with the other end of the metering hole when the metering hole slides to the second position and simultaneously one end of the metering hole is sealed by the first plate, and
and the power device is connected with the metering plate to drive the metering plate to slide, and the force generated when the power device drives the metering plate to slide is larger than the force required by the reciprocating sliding of the metering plate between the first position and the second position and is smaller than the force required by the metering plate to pull and burn the stuck medicament.
Further, the power plant includes:
and one end of a push-pull rod of the cylinder is connected with one end of the metering plate.
Furthermore, the device also comprises an in-place detection device; the in-place detection device includes:
the first position in-place switch is arranged on the air cylinder and used for detecting the position of the corresponding push-pull rod when the metering hole slides to the first position;
the second position in-place switch is arranged on the air cylinder and used for detecting the position of the corresponding push-pull rod when the metering hole slides to the second position;
and the control device is used for controlling the cylinder to act according to the feedback signal of the first position in-place switch or the second position in-place switch so as to unload the pressure of the cylinder when the feedback signal is abnormal.
Further, the power device further comprises:
the control valve is used for being connected with the air cylinder through the air return pipe and the air outlet pipe; and
and the pressure regulating valve is used for regulating the gas pressure in the control valve, one end of the pressure regulating valve is connected with the control valve, and the other end of the pressure regulating valve is connected with a gas source.
Further, the control device is respectively connected with the control valve and the pressure regulating valve.
Further, the control valve is a three-position five-way middle-drain control valve; and two coils of the three-position five-way middle-drain control valve are respectively connected with an air outlet pipe and an air return pipe of the air cylinder.
Furthermore, the metering plate is made of beryllium bronze; the first plate, the second plate and the hopper are all made of anti-static materials.
In a second aspect, an embodiment of the present invention provides a method for controlling a metering device for the explosive-and-flammable agent, including:
the inlet and outlet direction and pressure of compressed air in the air cylinder are adjusted to control the air cylinder to drive the metering hole of the metering plate to move to a first position or a second position to trigger a first position-to-position switch or a second position-to-position switch;
receiving a feedback signal of a first position-to-position switch or a feedback signal of a second position-to-position switch;
judging whether the received feedback signal of the first position-in-place switch or the received feedback signal of the second position-in-place switch is an abnormal signal, if not, finishing the corresponding metering operation; if so, determining that a fault occurs, and controlling a control valve of the air cylinder to relieve the pressure of the compressed air in the air cylinder so that the force for driving the metering plate to slide relative to the first plate and the second plate is smaller than the force required for the metering plate to slide between the first position and the second position in a reciprocating manner.
Further, judging whether the received feedback signal of the first position-to-position switch or the received feedback signal of the second position-to-position switch is an abnormal signal; the method comprises the following steps:
when the metering plate triggers the first position-to-position switch from the second position for a first designated time, judging that a feedback signal of the first position-to-position switch is a normal signal, otherwise, judging that the feedback signal of the first position-to-position switch is an abnormal signal;
and when the metering plate triggers the second position in-place switch after a second specified time from the second position, judging that the feedback signal of the second position in-place switch is a normal signal, otherwise, judging that the feedback signal of the second position in-place switch is an abnormal signal.
Further, the valve is a three-position five-way middle-drain control valve; when the fault is judged to occur, controlling a three-position five-way middle-leakage control valve of the cylinder to simultaneously relieve the air outlet pressure and the air return pressure of the cylinder so as to enable the output force of the cylinder to be zero;
the inlet and outlet direction and pressure of compressed air in the air cylinder are adjusted to control the air cylinder to drive the metering hole of the metering plate to move to a first position or a second position to trigger a first position-to-position switch or a second position-to-position switch; the method comprises the following steps:
the total pressure of the inlet and outlet five-way middle-drain control valve is adjusted through a pressure regulating valve;
the inlet and outlet direction and pressure of compressed air in the air cylinder are regulated through the five-way middle-leakage control valve so as to control the air cylinder to drive the metering hole of the metering plate to move to a first position or a second position to trigger the first position-to-position switch or the second position-to-position switch.
Compared with the prior art, the embodiment of the invention has the following advantages and beneficial effects:
according to the metering device and the control method for the inflammable and explosive medicament, disclosed by the embodiment of the invention, the defect that the medicament stuck when the metering plate moves is pulled and burned is avoided by controlling the force generated by the power device to be larger than the force required by the reciprocating sliding of the metering plate between the first position and the second position and smaller than the force required by the metering plate for pulling and burning the stuck medicament.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a metering device for an inflammable explosive agent.
Fig. 2 is a flow chart illustrating a control method of the metering device for the flammable and combustible chemicals.
Fig. 3 is a schematic diagram of the control system of the metering device for the flammable and combustible medicaments.
Reference numbers and corresponding part names in the drawings:
1-retraction in-place detection switch, 2-extension in-place detection switch, 3-cylinder, 4-hopper, 5-upper pressure plate, 6-metering plate, 7-bottom plate, 8-material leakage hole, 9-metering hole, 10-charging hole, 11-air outlet pipe, 12-air return pipe, 13-control valve, 14-pressure regulating valve, 15-pressure-regulated air pipe and 16-main air inlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present invention.
Examples
In order to solve the technical problem that an inflammable and explosive agent is easily ignited in a pulling process in the prior art, in a first aspect, an embodiment of the present invention provides a metering device for an inflammable and explosive agent, which is shown in fig. 1 and includes: the hopper 4 is used for storing inflammable explosive agents; the first plate is provided with a medicine loading hole 10 which is communicated with a discharge hole of the hopper, and the medicine loading hole is communicated with one end of the metering hole when the metering hole slides to a first position and is closed by the second plate at the same time; the metering plate 6 is provided with a metering hole and is arranged between the first plate and the second plate in a sliding manner so as to realize that one end of the metering hole 9 is communicated with the medicine loading hole at a first position or the other end of the metering hole is communicated with the medicine leakage hole at a second position when the metering plate slides; the second board is equipped with hourglass medicine hole 8, leak medicine hole be used for when the metering hole slides to the second position with the other end intercommunication of metering hole and the one end of metering hole is sealed by the first board simultaneously to and power device, be used for being connected with the metering board in order to drive the metering board and slide, power device drive metering board produced when sliding power be greater than the metering board between first position and second position required power and be less than the metering board will block the required power of medicament pull-burning.
Referring to fig. 1, the first position may be a discharge position corresponding to the charge hole; the second position can be a material leaking position corresponding to the medicine leaking hole; the first plate may be an upper platen 5 and the second plate may be a base plate 7; the power device drives the metering hole of the metering plate to move repeatedly at the position corresponding to the charging hole and the material leakage hole, so that the metering operation is realized.
The force for driving the metering plate to move by the power device is limited to be larger than the force necessary for the reciprocating sliding of the metering plate between the first position and the second position and smaller than the force necessary for the pulling combustion of the medicament clamped by the metering plate, so that the problem of safety accidents caused by the pulling combustion of the clamped medicament due to the overlarge stress on the metering plate when the clamped medicament is generated can be solved while the metering operation of the metering plate is met.
Therefore, the embodiment of the invention avoids the defect that the medicament stuck when the metering plate moves is ignited by controlling the force generated by the power device to be larger than the force required by the metering plate to slide between the first position and the second position in a reciprocating manner and smaller than the force required by the metering plate to ignite the medicament stuck.
Optionally, the power plant comprises:
and one end of a push-pull rod of the cylinder is connected with one end of the metering plate.
Furthermore, the device also comprises an in-place detection device; the in-place detection device includes:
the first position in-place switch is arranged on the air cylinder and used for detecting the position of the corresponding push-pull rod when the metering hole slides to the first position;
the second position in-place switch is arranged on the air cylinder and used for detecting the position of the corresponding push-pull rod when the metering hole slides to the second position;
and the control device is used for controlling the cylinder to act according to the feedback signal of the first position in-place switch or the second position in-place switch so as to unload the pressure of the cylinder when the feedback signal is abnormal.
Referring to fig. 1, the first position in-place switch may be an extended in-place detection switch 2, and the second position in-place switch may be a retracted in-place detection switch 1.
Further, the power device further comprises:
the control valve is used for being connected with the cylinder through a gas return pipe 12 and a gas outlet pipe 11; and
and the pressure regulating valve is used for regulating the gas pressure in the control valve, one end of the pressure regulating valve is connected with the control valve, and the other end of the pressure regulating valve is connected with a gas source.
Further, the control device is connected to a control valve 13 and a pressure regulating valve 14, respectively.
Further, the control valve is a three-position five-way middle-drain control valve; and two coils of the three-position five-way middle-drain control valve are respectively connected with an air outlet pipe and an air return pipe of the air cylinder.
Furthermore, the metering plate is made of beryllium bronze; the first plate, the second plate and the hopper are all made of anti-static materials.
Referring to FIG. 1, the pressure regulating valve is connected to the air supply via a main inlet conduit 16; the pressure regulating valve is connected with the control valve through a pressure regulating rear air pipe 15.
Exemplarily, referring to fig. 1, the metering device includes a hopper 4, an upper pressure plate 5, a metering plate 6, a bottom plate 7, a cylinder 3, an extension in-place detection switch 2, a retraction in-place detection switch 1, a pressure regulating valve 14, a control valve 13, a main air inlet pipe 16, a pressure-regulated air pipe 15, an air outlet pipe 11 and an air return pipe 12;
the measuring plate 6 is arranged below the upper pressing plate 5 and above the bottom plate 7, one end of the measuring plate is connected with a push-pull rod of the air cylinder, and the measuring plate can slide in the horizontal direction relative to the upper pressing plate and the bottom plate under the driving of the air cylinder. The clearance between the upper plane of the metering plate and the upper pressure plate is as small as possible so as to reduce the accumulation of floating chemicals.
The metering plate 6 is made of beryllium bronze and is provided with a medicine loading hole 10, and the volume of the medicine loading hole 10 directly determines the amount of the medicine.
The bottom plate 7 is made of steel and is provided with a material leaking hole 8 which is used for discharging the medicament metered out by the metering hole to finish metering. When the cylinder 3 drives the metering plate 6 to retract, the material leakage hole 8 is aligned with the center of the metering hole 9. The diameter of the material leakage hole is larger than that of the metering hole so as to ensure that the medicament in the metering hole is completely removed.
The top board adopts the steel material, has a charge hole 10, and charge hole 10 is used for putting into and filling the metering hole with the medicament of storage in the hopper when the metering plate is in the powder charge position. When the cylinder 3 drives the metering plate to extend to the charging position, the charging hole is aligned with the center of the metering hole. The diameter of the medicine filling hole is larger than that of the metering hole, and can be 1.5 times or more than that of the metering hole so as to ensure that the metering hole is completely filled with the medicine; meanwhile, the metering hole cannot be communicated with the medicine loading hole and the material leakage hole at the same time, so that the situation that discharging is started when the medicine metering is not finished is avoided.
The hopper is arranged above the upper pressure plate, is made of steel or other conductive or non-electrostatic materials and is used for storing the medicament. The hopper adopts a straight cylinder design and is aligned with the center of the medicine loading hole.
The push-pull rod of cylinder links to each other with the metering plate for drive metering plate seesaw between top board and bottom plate accomplishes the medicament measurement: when the cylinder extends to the right position, the metering hole is aligned with the center of the charging hole to finish charging; when the cylinder withdraws, the metering hole is not communicated with the charging hole to complete metering, and when the metering hole is aligned with the center of the material leaking hole, the material leaking is started to complete the metering process. The piston of the cylinder is provided with a magnetic ring, and the front end and the rear end outside the cylinder body of the cylinder are respectively provided with a stretching-out-in-place detection switch and a retracting-in-place detection switch. When the cylinder is in the extension in-place position and just in the charging position, the extension in-place detection switch just triggers; when the cylinder is in the retraction in place and just at the material leakage position, the retraction in place detection switch is just triggered;
the cylinder is driven by compressed air. Compressed air with the air pressure of more than 0.6MPa is connected into the pressure regulating valve through the main air inlet pipe. After the pressure is adjusted to a preset pressure by the pressure adjusting valve, compressed air is connected to the control valve through the air pipe after being adjusted by the pressure adjusting valve. The compressed air flows to the rear end or the front end of the cylinder through the air outlet pipe or the air return pipe to push the cylinder to advance or retract respectively through the control of the control valve, or the compressed air in the air outlet pipe or the air return pipe is directly exhausted.
The pressure regulating valve is used for regulating the pressure of the compressed air to a required safety pressure.
The control valve adopts a three-position five-way middle-drain control valve, and can drive air pressure to realize stretching, retracting and force-draining static states: when the control valve extends out of the side coil for driving, the cylinder extends out; when the control valve is driven to retract, the cylinder retracts; when the extension side and the retraction side of the control valve are not driven, compressed air on two sides of the piston of the air cylinder respectively flows through the control valve through air pipes on two ends and is exhausted to the air environment outside the valve.
Compared with the prior art, the embodiment of the invention is different from the prior art, and the common driving mode of mechanical driving of a cam and the like or the driving mode of a sensitive medicament metering plate of a direct driving cylinder under the working air pressure of 0.6MPa basically drives the sensitive medicament metering plate by an output value far larger than the medicament ignition force under the abnormal condition. The driving air pressure of the air cylinder for driving the metering plate is adjusted to a pressure value P1 by using a pressure regulating valve, so that the force F generated by the piston of the air cylinder is greater than the minimum value F1 of normal force for ensuring that the metering plate smoothly slides back and forth to finish metering, but is far less than the minimum value F2 of abnormal conditions such as medicine clamping, ignition and the like. Under normal conditions, the pressure value P1 drives the metering plate to normally draw the medicine for metering through the air cylinder; under the abnormal conditions of medicine clamping and the like, the pressure value P1 drives the cylinder to generate the maximum output force F acting on the medicine to complement the medicine to ignite, and an intrinsically safe pneumatic driving system of the metering plate is realized by limiting the maximum force output to the medicine.
In addition, the control valve of the metering plate driving cylinder usually adopts a two-position 5-way control valve, and only has two states of extension and retraction. When the abnormal handling such as medicine blocking or medicine accumulation is carried out, the cylinder still stores larger working force before the fault is not handled, especially when people arrive at the dangerous site of the equipment for handling, and still has larger potential safety hazard. By adopting the three-position five-way middle-leakage control valve, the control valve can be immediately switched to a middle-leakage mode after a fault occurs, so that compressed air at two ends of a piston of the air cylinder is timely released, the output force of the air cylinder is instantly switched to zero from a working output value, and thorough safety is realized.
On the basis of the above metering device for flammable and explosive agents, in a second aspect, an embodiment of the present invention provides a control method for the metering device for flammable and explosive agents, which is shown in fig. 2 and includes:
s1, adjusting the inlet and outlet direction and pressure of compressed air in an air cylinder to control the air cylinder to drive a metering hole of a metering plate to move to a first position or a second position to trigger a first position-to-position switch or a second position-to-position switch;
s2, receiving a feedback signal of the first position in-place switch or a feedback signal of the second position in-place switch;
s3, judging whether the received feedback signal of the first position in-place switch or the feedback signal of the second position in-place switch is an abnormal signal or not;
the abnormal signal may mean that the first position to position switch is not triggered, may mean that the first position is not triggered within a first specified time, or may mean that the first position to position switch is triggered within less than the first specified time.
S4, if not, completing corresponding metering operation;
and S5, if so, judging that a fault occurs, and controlling a control valve of the air cylinder to relieve the pressure of compressed air in the air cylinder so that the force for driving the metering plate to slide relative to the first plate and the second plate is smaller than the force required by the reciprocating sliding of the metering plate between the first position and the second position.
Further, judging whether the received feedback signal of the first position-to-position switch or the received feedback signal of the second position-to-position switch is an abnormal signal; the method comprises the following steps:
s31, when the metering plate triggers the first position-in-place switch from the second position for a first designated time, judging that a feedback signal of the first position-in-place switch is a normal signal, and otherwise, judging that the feedback signal of the first position-in-place switch is an abnormal signal;
s32, when the metering plate triggers the second position in-place switch after a second specified time from the second position, judging that the feedback signal of the second position in-place switch is a normal signal, and otherwise, judging that the feedback signal of the second position in-place switch is an abnormal signal.
Further, the valve is a three-position five-way middle-drain control valve; when the fault is judged to occur, controlling a three-position five-way middle-leakage control valve of the cylinder to simultaneously relieve the air outlet pressure and the air return pressure of the cylinder so as to enable the output force of the cylinder to be zero;
the inlet and outlet direction and pressure of compressed air in the air cylinder are adjusted to control the air cylinder to drive the metering hole of the metering plate to move to a first position or a second position to trigger a first position-to-position switch or a second position-to-position switch; the method comprises the following steps:
s11, adjusting the total pressure of a discharge control valve in and out of the five-way valve through a pressure regulating valve;
the pressure regulating valve of the example of the invention has the function of regulating the total pressure of the compressed air flowing in and out of the five-way middle pressure relief control valve.
S12, the inlet and outlet direction and pressure of compressed air in the air cylinder are adjusted through the five-way middle-leakage control valve, so that the air cylinder is controlled to drive the metering hole of the metering plate to move to a first position or a second position, and the first position-to-position switch or the second position-to-position switch is triggered.
The five-way middle-drain control valve is connected with an air outlet pipe and an air return pipe of the cylinder; the air cylinder can move to a first position under the action of compressed air applied by the air outlet pipe and move to a second position under the action of compressed air applied by the air return pipe; thereby realizing the control of the motion direction of the metering plate by adjusting the pressure in the air outlet pipe and the air return pipe; when the pressure in the air outlet pipe and the air return pipe of the five-way middle-leakage control valve is failed, the pressure of the compressed air in the air cylinder is zero, and therefore the whole metering operation is safer.
Exemplarily, the specific steps include:
controlling the pressure regulating valve to regulate the output pressure P at the rear end to a pressure value P1, so that the force F generated by the piston of the cylinder is greater than the minimum value F1 of normal force for ensuring that the metering plate smoothly slides back and forth to finish metering, but is far less than the minimum value F2 of abnormal conditions such as medicine clamping, ignition and the like;
driving the extending side of the control valve, not driving the retracting side, driving the metering plate to advance to a first position by the air cylinder to charge, and triggering the metering plate to extend to the target position after a first designated time and completing charging; if the control valve does not trigger the first position-in-place switch after the first specified time, judging that a fault occurs, immediately switching the extending side and the retracting side of the control valve to be not driven to output, reducing the output force of the cylinder to zero, and giving alarm information E1;
the control valve is driven by the withdrawing side, the extending side is not driven, the metering plate is driven by the air cylinder to retreat to the material placing position, and the metering plate is withdrawn to the in-place detection switch after a second designated time to trigger and complete material placing to complete a metering action; if the control valve does not trigger the second position in-place switch after the second designated time is exceeded, judging that a fault occurs, immediately switching the extending side and the retracting side of the control valve to be not driven to output, reducing the output force of the cylinder to zero, and giving alarm information E2;
fourthly, under normal conditions, repeating the third step and the fourth step to finish the measurement; and (4) under the abnormal condition, after the fault is manually processed according to the alarm information, restarting.
In the first step, the output pressure P at the rear end of the pressure regulating valve is regulated to a pressure value P1 by controlling the pressure regulating valve, so that the force F generated by the piston of the cylinder ensures that the metering plate can finish normal medicine drawing metering production, and the condition that the output force exceeds the sensitivity of the medicine to cause danger under the abnormal condition can be avoided, and finally, an intrinsically safe metering plate pneumatic driving system is realized.
In the second step and the third step, after the control valve is output and abnormal faults are detected and identified through the front and back in-place detection switch, the control valve can be switched to a middle leakage state within the shortest time T3 milliseconds, the output force of the air cylinder is switched to zero, no external force is applied to the medicaments in dangerous states such as medicament blocking, medicament accumulation and the like, and thorough safety is achieved.
The control time for controlling the valve and diagnosing the fault using the interrupt routine is not more than 5 msec, and the actuation time of the control valve 11 is not more than 20 msec, and finally T3 is not more than 25 msec.
Embodiments of the present invention have been successfully implemented. The compressed air with the air pressure adjusted by the pressure adjusting valve drives the air cylinder to quickly complete the metering of the sensitive medicament. When the medicine is abnormally issued, such as the medicine is stuck or accumulated, the fault can be instantly identified, the control valve is switched to the middle leakage state, and the metering plate does not have output force from the air cylinder at the moment, so that the safety during the fault recovery period is ensured. The intrinsically safe pneumatic driving system of the metering plate is constructed in the metering process, and the driving force is instantly switched to a zero value when a fault occurs, so that the safety of the whole process of metering the sensitive medicament is realized.
In a third aspect, an embodiment of the present invention provides a control system for a metering device of a flammable and combustible medicament, as shown in fig. 3, including:
the control unit is used for adjusting the inlet and outlet direction and pressure of compressed air in the air cylinder so as to control the air cylinder to drive the metering hole of the metering plate to move to a first position or a second position to trigger the first position-to-position switch or the second position-to-position switch;
the receiving unit is used for receiving a feedback signal of the first position-to-position switch or a feedback signal of the second position-to-position switch;
the judging unit is used for judging whether the received feedback signal of the first position-in-place switch or the received feedback signal of the second position-in-place switch is an abnormal signal or not, and if not, the corresponding metering operation is finished; if so, determining that a fault occurs, and controlling a control valve of the air cylinder to relieve the pressure of the compressed air in the air cylinder so that the force for driving the metering plate to slide relative to the first plate and the second plate is smaller than the force required for the metering plate to slide between the first position and the second position in a reciprocating manner.
The working principle of the control system is the same as that of the control method, which is not described herein again.
In a fourth aspect, an embodiment of the present invention provides a particle propellant multichannel cooperative metering system, which includes a memory, a processor and a transceiver, which are sequentially connected in communication, wherein the memory is used for storing a computer program, the transceiver is used for sending and receiving messages, and the processor is used for reading the computer program and executing a control method of a metering device of a flammable explosive agent.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A metering device for a flammable explosive agent, comprising:
the hopper is used for storing inflammable and explosive agents;
the first plate is provided with a medicine loading hole, the medicine loading hole is communicated with a discharge hole of the hopper, and the medicine loading hole is communicated with one end of the metering hole when the metering hole slides to a first position and is closed by the second plate at the same time;
the metering plate is provided with a metering hole and is arranged between the first plate and the second plate in a sliding manner so that one end of the metering hole is communicated with the medicine loading hole at a first position or the other end of the metering hole is communicated with the medicine leakage hole at a second position when the metering plate slides;
a second plate provided with a medicine leakage hole for communicating with the other end of the metering hole when the metering hole slides to the second position and simultaneously one end of the metering hole is sealed by the first plate, and
and the power device is connected with the metering plate to drive the metering plate to slide, and the force generated when the power device drives the metering plate to slide is larger than the force required by the reciprocating sliding of the metering plate between the first position and the second position and is smaller than the force required by the metering plate to pull and burn the stuck medicament.
2. A metering device for a flammable and explosive charge as defined in claim 1, wherein said power means comprises:
and one end of a push-pull rod of the cylinder is connected with one end of the metering plate.
3. The apparatus for metering a flammable and combustible explosive agent according to claim 2, further comprising a position detecting means; the in-place detection device includes:
the first position in-place switch is arranged on the air cylinder and used for detecting the position of the corresponding push-pull rod when the metering hole slides to the first position;
the second position in-place switch is arranged on the air cylinder and used for detecting the position of the corresponding push-pull rod when the metering hole slides to the second position;
and the control device is used for controlling the cylinder to act according to the feedback signal of the first position in-place switch or the second position in-place switch so as to unload the pressure of the cylinder when the feedback signal is abnormal.
4. A metering device for a flammable and explosive charge as defined in claim 3, wherein said power plant further comprises:
the control valve is used for being connected with the air cylinder through the air return pipe and the air outlet pipe; and
and the pressure regulating valve is used for regulating the gas pressure in the control valve, one end of the pressure regulating valve is connected with the control valve, and the other end of the pressure regulating valve is connected with a gas source.
5. The apparatus for metering an inflammable explosive agent according to claim 4, wherein the control device is connected to the control valve and the pressure regulating valve, respectively.
6. The metering device of the inflammable explosive agent according to claim 5, wherein the control valve is a three-position five-way middle-leakage control valve; and two coils of the three-position five-way middle-drain control valve are respectively connected with an air outlet pipe and an air return pipe of the air cylinder.
7. The metering device of the inflammable and explosive agent according to any one of claims 1 to 6, characterized in that the metering plate is made of beryllium bronze; the first plate, the second plate and the hopper are all made of anti-static materials.
8. A method for controlling a device for metering a flammable and explosive agent according to any one of claims 4 to 6, comprising:
the inlet and outlet direction and pressure of compressed air in the air cylinder are adjusted to control the air cylinder to drive the metering hole of the metering plate to move to a first position or a second position to trigger a first position-to-position switch or a second position-to-position switch;
receiving a feedback signal of a first position-to-position switch or a feedback signal of a second position-to-position switch;
judging whether the received feedback signal of the first position-in-place switch or the received feedback signal of the second position-in-place switch is an abnormal signal, if not, finishing the corresponding metering operation; if so, determining that a fault occurs, and controlling a control valve of the air cylinder to relieve the pressure of the compressed air in the air cylinder so that the force for driving the metering plate to slide relative to the first plate and the second plate is smaller than the force required for the metering plate to slide between the first position and the second position in a reciprocating manner.
9. The method for controlling a device for metering an inflammable explosive agent according to claim 8, wherein it is judged whether the received feedback signal of the first position switch or the feedback signal of the second position switch is an abnormal signal; the method comprises the following steps:
when the metering plate triggers the first position-in switch from the second position for a first designated time, judging that a feedback signal of the first position-in switch is a normal signal, otherwise, judging that the feedback signal of the first position-in switch is an abnormal signal;
and when the metering plate triggers the second position in-place switch after a second specified time from the second position, judging that the feedback signal of the second position in-place switch is a normal signal, otherwise, judging that the feedback signal of the second position in-place switch is an abnormal signal.
10. The method for controlling a device for metering an explosive and flammable medicament as defined in claim 9 wherein the valve is a three-position five-way relief control valve; when the fault is judged to occur, controlling a three-position five-way middle-leakage control valve of the cylinder to simultaneously relieve the air outlet pressure and the air return pressure of the cylinder so as to enable the output force of the cylinder to be zero;
the inlet and outlet direction and pressure of compressed air in the air cylinder are adjusted to control the air cylinder to drive the metering hole of the metering plate to move to a first position or a second position to trigger a first position-to-position switch or a second position-to-position switch; the method comprises the following steps:
the total pressure of the inlet and outlet five-way middle-drain control valve is adjusted through a pressure regulating valve;
the inlet and outlet direction and pressure of compressed air in the air cylinder are regulated through the five-way middle-leakage control valve so as to control the air cylinder to drive the metering hole of the metering plate to move to a first position or a second position to trigger the first position-to-position switch or the second position-to-position switch.
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| CN202210226866.9A CN114507106B (en) | 2022-03-08 | 2022-03-08 | Metering device and control method for inflammable and explosive medicament |
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| CN114507106B (en) | 2023-04-11 |
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