CN115596881A - Poppet valve with air-break protection device - Google Patents
Poppet valve with air-break protection device Download PDFInfo
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- CN115596881A CN115596881A CN202211609138.2A CN202211609138A CN115596881A CN 115596881 A CN115596881 A CN 115596881A CN 202211609138 A CN202211609138 A CN 202211609138A CN 115596881 A CN115596881 A CN 115596881A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/004—Fluid pressure supply failure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
- F16K31/1245—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated with more than one valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K35/00—Means to prevent accidental or unauthorised actuation
- F16K35/10—Means to prevent accidental or unauthorised actuation with locking caps or locking bars
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0058—Optical means, e.g. light transmission, observation ports
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to the technical field of poppet valves, in particular to a poppet valve with a gas cut-off protection device. According to the invention, the infrared distance meter is arranged at the bottom of the reset spring to detect the real-time compression distance of the reset spring, and the real-time compression distance is judged through the central control module, so that the operation state of the poppet valve can be rapidly determined, whether the main cylinder is in an open state or not is judged according to whether the pressure relief valve is in the reduced pressure state, the misjudgment of gas-cut protection can be effectively avoided when the poppet valve normally operates, the accuracy of gas-cut judgment is improved, the pressure reduction speed in the main cylinder is determined according to the real-time air pressure variation of the main cylinder, and the gas-cut protection mode is selected, so that the operation stability of the poppet valve can be maintained, the accuracy of gas-cut judgment is improved, and the normal operation of the poppet valve is ensured when the poppet valve is in gas-cut protection.
Description
Technical Field
The invention relates to the technical field of poppet valves, in particular to a poppet valve with a gas-cut-off protection device.
Background
The valve has very extensive application in industrial production, each trade of life, it is the indispensable device of domestic water pipeline, industrial fluid pipeline, and the poppet valve is usually through the removal that the cylinder pushed the valve plate to control the flow of fluid medium in the pipeline, and there is the response time fast and the high point of velocity of flow, but the poppet valve adopts the cylinder as power element, and the cylinder is inside usually to be in high-pressure state, therefore pneumatic poppet valve often can appear the problem of the local outage of cylinder, influence the normal use of poppet valve, present multiple poppet valve all sets up the protection device that ends the gas in inside, but the protection effect that ends the gas is relatively poor, when the poppet valve in industrial production takes place the outage, still can produce great influence.
Chinese patent publication No.: CN112361050A discloses a poppet valve with gas-break protection device, it takes place the outage at the cylinder of poppet valve, drive the alarm through time relay and remind the staff, and support spacingly to the damping plate through the electro-magnet, it is thus clear that poppet valve cylinder gas-break among the prior art judges that the accuracy is relatively poor, the condition of false alarm often appears, and the normal operating of poppet valve can still be influenced to the gas-break protection of starting in the false alarm, and simultaneously, when the cylinder gas-break actually appears, the normal operating can not be maintained to most poppet valves.
Disclosure of Invention
Therefore, the invention provides a poppet valve with a gas-break protection device, which is used for solving the problem that the normal operation of the poppet valve in the prior art is influenced by the gas-break protection due to the fact that false alarm is easy to occur.
In order to achieve the above objects, the present invention provides a poppet valve with a gas cutoff protection device, including,
the actuating mechanism is used for driving the valve plate to move through the valve rod and controlling the flow rate of fluid media in an external pipeline, a return spring is sleeved on the outer side of the valve rod and used for controlling the valve rod to reset, an infrared distance meter is arranged at the bottom of the return spring and used for detecting the real-time compression distance of the return spring, a driving block is arranged at the top of one end of the valve rod, and a limiting clamping groove is formed in the other end of the valve rod;
the driving mechanism is used for controlling the position of the driving block in the main cylinder by adjusting the air pressure in the main cylinder, the valve rod is driven to move by the driving block, one side of the main cylinder is connected with the auxiliary cylinder through an opening valve, the other side of the main cylinder is provided with a pressure relief valve for controlling the air pressure in the main cylinder, the upper part of the main cylinder is provided with an air compressor, and the air compressors are respectively connected with the main cylinder and the auxiliary cylinder and used for respectively controlling the air pressure in the main cylinder and the auxiliary cylinder;
the air-break protection device is used for limiting and fixing the valve rod by controlling the clamping of the electric clamping pin and the limiting clamping groove, and the air-break protection device also comprises an alarm indicator lamp for giving an air-break alarm;
the central control module can judge the real-time compression distance of the reset spring, determine the operation state of the poppet valve, when the central control module judges that the poppet valve is in a standard operation state, the central control module judges whether the main cylinder is in an air-break state according to the real-time air pressure variation of the main cylinder in unit detection time and whether the pressure relief valve is opened, and when the main cylinder is judged to be in the air-break state, determines to perform air supply type air-break protection into the main cylinder through the auxiliary cylinder or perform air-break protection through popping of the electric bayonet lock and clamping with the limit clamping groove according to the compensated air pressure variation of the auxiliary cylinder, and controls the alarm indicator lamp to give an alarm when the air-break protection is performed.
Furthermore, the central control module is internally provided with a minimum compression distance Ha and a maximum compression distance Hz of the return spring, wherein Ha is less than Hz, the central control module obtains a real-time compression distance Hs of the return spring through the infrared distance meter, the central control module compares the real-time compression distance Hs of the return spring with the minimum compression distance Ha and the maximum compression distance Hz,
when Hs is less than or equal to Ha, the central control module judges that the real-time compression distance of the return spring does not exceed the minimum compression distance, the central control module judges that the poppet valve does not operate, and the gas-cut protection judgment is not carried out;
when Ha is larger than Hs and smaller than Hz, the central control module judges that the real-time compression distance of the reset spring is between the minimum compression distance and the maximum compression distance, the central control module judges that the poppet valve is in a standard operation state, and the central control module calculates the real-time air pressure variation in the main cylinder and judges the real-time air pressure variation to determine whether the poppet valve is in an air-break state;
when Hs is larger than or equal to Ha, the central control module judges that the real-time compression distance of the reset spring reaches the maximum compression distance, the central control module judges that the poppet valve is in an overpressure operation state, the central control module judges whether the pressure relief valve is opened or not according to the real-time compression distance of the reset spring to relieve the pressure of the main cylinder, and the opening of the pressure relief valve is adjusted in real time according to the real-time compression distance of the reset spring.
Further, a unit detection time length t is set in the central control module, a pressure gauge is set in the main cylinder, when the central control module determines that the real-time compression distance of the return spring is between the minimum compression distance and the maximum compression distance, the pressure gauge will detect the real-time pressure in the main cylinder and transmit the detection result to the central control module in real time, and the central control module calculates the real-time air pressure variation Ps of the main cylinder in the unit detection time length t, wherein Ps = P2-P1, P1 is the current real-time pressure in the main cylinder, and P2 is the real-time pressure in the main cylinder after the unit detection time length t.
Furthermore, a standard fluctuation air pressure change Pb of the master cylinder is arranged in the central control module, wherein Pb is more than 0, the central control module can compare the absolute value of the calculated real-time air pressure change Ps with the standard fluctuation air pressure change Pb,
when the absolute value of the pressure variation Ps is less than or equal to Pb, the central control module judges that the absolute value of the real-time pressure variation Ps does not exceed the standard fluctuation pressure variation Pb, the central control module judges that the master cylinder is in a standard pressure maintaining state, and the central control module does not carry out gas-off protection judgment;
and when the absolute value of the real-time air pressure variation Ps exceeds the standard fluctuation air pressure variation Pb, the central control module judges the real-time air pressure variation Ps to determine the state of the master cylinder.
Further, when the central control module determines that the absolute value of the real-time air pressure variation Ps exceeds the standard fluctuation air pressure variation Pb, the central control module determines the real-time air pressure variation Ps,
if Ps is less than 0, the central control module judges that the master cylinder is in a decompression state, and the central control module judges the state of the pressure relief valve to determine whether the master cylinder is in a gas-off state;
if Ps is larger than 0, the central control module judges that the main cylinder is in a pressurization state, the central control module judges that the poppet valve operates normally, and the air-break protection judgment is not carried out.
Further, when the central control module judges that the master cylinder is in a decompression state, the central control module acquires the state of the pressure relief valve and judges,
if the pressure relief valve is in an open state, the central control module judges that the main cylinder normally operates and does not perform gas-break protection;
if the pressure relief valve is in a closed state, the central control module judges that the main cylinder is in an air-break state, and the central control module judges the real-time air pressure variation Ps of the main cylinder to determine an air-break protection mode.
Furthermore, the central control module is internally provided with a compensatable air pressure variation Pk of the auxiliary cylinder, wherein Pk is larger than 0, when the central control module judges that the main cylinder is cut off, the central control module compares the absolute value of the real-time air pressure variation Ps with the compensatable air pressure variation Pk,
when the absolute value Ps is less than or equal to Pk, the central control module judges that the real-time air pressure variation of the main air cylinder does not exceed the compensatable air pressure variation, the central control module controls the opening valve to be opened, air is supplied to the main air cylinder through the auxiliary air cylinder, and the central control module controls the alarm indicator lamp to give an alarm;
when Ps is greater than Pk, the central control module judges that the real-time air pressure variation of the master cylinder exceeds the compensatable air pressure variation, and the central control module controls the electric clamping pin to pop out and clamp with the limit clamping groove, so as to carry out air-off protection on the lift valve and control the alarm indicator lamp to alarm.
Further, the compensated air pressure variation Pk set in the central control module is a calculation value of the central control module, and the calculation mode is Pk = Pf-Pe;
and Pf is the real-time air pressure in the auxiliary air cylinder, and Pe is the air pressure in the main air cylinder when the central control module judges that the main air cylinder is disconnected.
Furthermore, the central control module is internally provided with a maximum opening Ca of the opening valve, and when the central control module controls the opening valve to open into the main cylinder for air supplement, the central control module sets the real-time opening of the opening valve to be Cs, cs = Ca × (| Ps |/Pk).
Furthermore, the pressure relief opening of the pressure relief valve is adjustable, the central control module is internally provided with a standard overpressure pressure relief opening Cr and a standard overpressure distance Hc of the pressure relief valve, wherein Hc is larger than Ha, when the central control module judges that the real-time compression distance of the reset spring reaches the maximum compression distance, the central control module compares the real-time compression distance Hs of the reset spring with the standard overpressure distance Hc,
when Hs is larger than or equal to Hc, the central control module judges that the real-time compression distance of the reset spring reaches a standard overpressure distance, the central control module opens the pressure relief valve to relieve pressure, and the opening of the pressure relief valve is adjusted and set to Cv, wherein Cv = Cr x [1+ (Hs-Hc)/Hc ];
when Hs is smaller than Hc, the central control module judges that the real-time compression distance of the reset spring does not reach the standard overpressure distance, the central control module controls the air compressor to stop air intake into the main cylinder, and the central control module does not control the pressure relief valve to be opened.
Compared with the prior art, the method has the advantages that the infrared distance meter is arranged at the bottom of the reset spring to detect the real-time compression distance of the reset spring, the real-time compression distance is judged through the central control module, the operation state of the poppet valve can be rapidly determined, the real-time air pressure variation in the main cylinder is judged when the poppet valve is in a standard operation state, the poppet valve is determined to be in decompression, pressurization or pressure holding, when the poppet valve is in the decompression state, whether the main cylinder is in an open state or not is judged according to the pressure relief valve, the phenomenon that air is cut off when the poppet valve normally operates can be effectively avoided, the error judgment of air cut-off protection is avoided, the accuracy of air cut-off judgment is improved, when the main cylinder is in an air cut-off state, the descending speed of the pressure in the main cylinder is determined according to the real-time air pressure variation of the main cylinder, when the pressure in the main cylinder is quickly reduced, the rigid air cut-off protection is realized by directly controlling the electric clamping pin to be clamped with the limiting clamping groove, the valve rod to be fixed, when the pressure in the main cylinder is slowly reduced, air cut-off protection effect is realized, and the operation of the poppet valve can be stably ensured, and the normal air cut-off protection of the poppet valve can be more accurately judged.
Particularly, the real-time compression distance of a return spring detected by the infrared distance meter is judged through the central control module, the real-time cylinder running state is determined, when the real-time compression distance of the return spring reaches the maximum compression distance, the poppet valve is in an overpressure running state, the central control module judges the real-time compression distance again to really determine whether the pressure relief valve is opened to relieve pressure of the main cylinder, on the basis of guaranteeing normal running of the poppet valve, opening of the pressure relief valve is automatically determined, gas break of the main cylinder due to the overpressure state is avoided, when the real-time compression distance of the return spring does not exceed the minimum compression distance, the poppet valve is in a non-running state, judgment of gas break protection of the poppet valve is not needed, and false alarm is effectively reduced.
Furthermore, the unit detection time is set in the central control module, the central control module calculates the real-time air pressure variation of the main air cylinder according to the unit detection time and the real-time pressure in the main air cylinder, and the state of the poppet valve can be quickly judged according to the real-time air pressure variation of the main air cylinder, so that the efficiency of poppet valve judgment is improved, the accuracy of a judgment result is greatly improved, and the condition of false alarm judgment of poppet valve air-break protection is reduced.
Furthermore, the standard fluctuation air pressure variation is set in the central control module, and the absolute value of the real-time air pressure variation of the main air cylinder is compared with the standard fluctuation air pressure variation, on one hand, the pressurization and decompression conditions in the main air cylinder can be more accurately represented by processing the absolute value of the real-time air pressure variation, and multiple judgments are avoided.
Furthermore, the master cylinder is determined to be in a decompression state or a pressurization state through the judgment of the central control module on the positive value and the negative value of the real-time air pressure variation of the master cylinder, when the master cylinder is in the pressurization state and is in a standard operation state, the air cut-off phenomenon is less generated, even if the air cut-off occurs during the pressurization, the central control module can quickly judge the air cut-off condition of the master cylinder according to the real-time air pressure variation of the master cylinder during the air cut-off, therefore, when the master cylinder is in the pressurization state, the judgment process of poppet valve air cut-off protection is not executed, the judgment complexity is effectively reduced, and meanwhile, the service life of the central control module is prolonged.
Further, when the main cylinder is in a decompression state, the state of the pressure relief valve is judged, if the pressure relief valve is in an opening state, the poppet valve is in a normal pressure relief state, and therefore air-break protection is not performed, when the pressure relief valve is in a closing state, the central control module judges that air break occurs in the main cylinder, and an air-break protection mode is determined according to the real-time air pressure variation of the main cylinder, so that the normal operation of the poppet valve is prevented from being influenced.
Particularly, when the central control module judges that the main cylinder is in a gas failure state, the central control module compares the real-time air pressure variation with the compensatable air pressure variation of the auxiliary cylinder, when the real-time air pressure variation does not exceed the compensatable air pressure variation, the situation that the main cylinder has a small air leakage and gas failure is shown, therefore, the auxiliary cylinder supplies air into the main cylinder by opening the opening valve, the normal operation of the poppet valve is maintained, meanwhile, the alarm indicator lamp gives an alarm, when the real-time air pressure variation exceeds the compensatable air pressure variation, the situation that the gas failure degree of the main cylinder is serious or the air pressure in the auxiliary cylinder is insufficient, and the pressure cannot be supplemented is shown, therefore, the valve rod is fixed by controlling the electric bayonet lock to pop out, the poppet valve is kept in the current operation state, and then the alarm indicator lamp gives an alarm to prompt for management and maintenance.
Furthermore, the amount of change of the compensatable air pressure arranged in the central control module is influenced by the real-time air pressure in the auxiliary air cylinder, when the auxiliary air cylinder supplements air in the main air cylinder, the real-time air pressure in the auxiliary air cylinder drops along with the increase of the air supplementing time length, so that the amount of change of the compensatable air pressure arranged in the central control module is also a real-time change value, when the amount of change of the real-time air pressure exceeds the amount of change of the compensatable air pressure, the electric popup bayonet lock still needs to be controlled to fix the valve rod, the poppet valve keeps the current running state, and the air-break protection is carried out.
Furthermore, a standard overpressure pressure relief opening and a standard overpressure distance are arranged in the central control module, when the poppet valve is in an overpressure operation state, the real-time compression distance is compared with the standard overpressure distance, when the real-time compression distance of the reset spring does not reach the standard overpressure distance, the air compressor is controlled to stop operating, the pressure in the main cylinder is controlled to be stable, the normal operation of the poppet valve is guaranteed, when the real-time compression distance of the reset spring reaches the standard overpressure distance, the opening of the pressure relief valve is controlled through the central control module, pressure relief of the main cylinder is carried out, the phenomenon that air is cut off due to overlarge pressure in the main cylinder is avoided, and the air cut-off condition of the poppet valve is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a poppet valve with a gas-break protection device according to the present embodiment.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in conjunction with the following examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Please refer to fig. 1, which is a schematic structural diagram of a poppet valve with an air-break protection device according to this embodiment, and this embodiment discloses a poppet valve with an air-break protection device, including an actuating mechanism 1, a valve rod 101, a valve plate 102, a return spring 103, an infrared distance meter 104, a driving block 105, a limiting slot 106, a driving mechanism 2, a main cylinder 201, an opening valve 202, an auxiliary cylinder 203, a pressure relief valve 204, an air compressor 205, a pressure gauge 206, an air-break protection device 3, an electric latch 301, an alarm indicator light 302, and a central control module (not shown in the figure), wherein,
the actuating mechanism 1 is used for driving the valve plate 102 to move through the valve rod 101 and controlling the flow rate of a fluid medium in an external pipeline, a return spring 103 is sleeved on the outer side of the valve rod 101 and used for controlling the valve rod 101 to reset, an infrared distance meter 104 is arranged at the bottom of the return spring 103 and used for detecting the real-time compression distance of the return spring 103, a driving block 105 is arranged at the top of one end of the valve rod 101, and a limiting clamping groove 106 is arranged at the other end of the valve rod 101;
the driving mechanism 2 is used for controlling the position of the driving block 105 in the main cylinder 201 by adjusting the air pressure in the main cylinder 201, the valve rod 101 is driven to move by the driving block 105, one side of the main cylinder 201 is connected with the auxiliary cylinder 203 through the opening valve 202, the other side of the main cylinder 201 is provided with a pressure relief valve 204 for controlling the air pressure in the main cylinder 201, the upper part of the main cylinder 201 is provided with an air compressor 205, and the air compressor 205 is respectively connected with the main cylinder 201 and the auxiliary cylinder 203 and is used for respectively controlling the air pressure in the main cylinder 201 and the auxiliary cylinder 203;
the gas-cut-off protection device 3 is used for limiting and fixing the valve rod 101 by controlling the clamping of the electric clamping pin 301 and the limiting clamping slot 106, and the gas-cut-off protection device 3 further comprises an alarm indicator lamp 302 for giving a gas-cut-off alarm;
and the central control module is connected with the actuating mechanism 1, the driving mechanism 2 and the gas-break protection device 3 respectively, and can judge the real-time compression distance of the return spring 103 to determine the operation state of the poppet valve, when the central control module determines that the poppet valve is in a standard operation state, the central control module determines whether the main cylinder 201 is in a gas-break state according to the real-time air pressure variation of the main cylinder 201 in unit detection time and whether the pressure relief valve 204 is in an open state, determines that gas-supplementing type gas-break protection is performed on the main cylinder 201 through the auxiliary cylinder 203 or the electric bayonet lock 301 is popped up and is in clamping connection with the limit clamping groove 106 to perform gas-break protection according to the compensatable air pressure variation of the auxiliary cylinder 203 when the main cylinder 201 is determined to be in the gas-break state, and controls the alarm indicator lamp 302 to alarm when the gas-break protection is performed.
The method comprises the steps that an infrared distance meter 104 is arranged at the bottom of a reset spring 103 to detect the real-time compression distance of the reset spring 103, a central control module is used for judging the real-time compression distance, the operating state of a poppet valve can be rapidly determined, the real-time air pressure variation in a main air cylinder 201 is determined when the poppet valve is in a standard operating state, the poppet valve is determined to be in pressure reduction, pressurization or holding pressure, whether the main air cylinder 201 is in an open state or not is determined according to the opening state of a pressure relief valve 204 when the poppet valve is in the pressure reduction state, the situation that the air is cut off when the poppet valve normally operates can be effectively avoided, the air cut-off protection of a hard valve rod 101 is improved, the air cut-off protection of the poppet valve can be realized by determining the speed of the pressure reduction in the main air cylinder 201 according to the real-time air pressure variation in the main air cylinder 201, when the pressure in the main air cylinder 201 is reduced rapidly, the air cut-off protection effect is achieved by controlling an electric clamping pin to be popped out and clamped with a limiting clamping groove 106, the hard valve rod 101 to be fixed, the air cut-off protection of the poppet valve can be ensured to operate accurately when the pressure reduction in the main air cut-off state is performed slowly, and the main air cut-off protection of the poppet valve can be performed in a certain time.
Specifically, the central control module is provided with a minimum compression distance Ha and a maximum compression distance Hz of the return spring 103, wherein Ha is less than Hz, the central control module obtains a real-time compression distance Hs of the return spring 103 through the infrared distance meter 104, the central control module compares the real-time compression distance Hs of the return spring 103 with the minimum compression distance Ha and the maximum compression distance Hz,
when Hs is less than or equal to Ha, the central control module judges that the real-time compression distance of the reset spring 103 does not exceed the minimum compression distance, the central control module judges that the poppet valve does not operate, and the air-break protection judgment is not carried out;
when Ha is more than Hs and less than Hz, the central control module judges that the real-time compression distance of the reset spring 103 is between the minimum compression distance and the maximum compression distance, the central control module judges that the poppet valve is in a standard operation state, and the central control module calculates the real-time air pressure variation in the main air cylinder 201 and judges the real-time air pressure variation to determine whether the poppet valve is disconnected;
when Hs is larger than or equal to Ha, the central control module judges that the real-time compression distance of the return spring 103 reaches the maximum compression distance, the central control module judges that the poppet valve is in an overpressure operation state, the central control module judges whether the pressure relief valve 204 is opened or not according to the real-time compression distance of the return spring 103 to relieve the pressure of the main cylinder 201, and the opening of the pressure relief valve 204 is adjusted in real time according to the real-time compression distance of the return spring 103.
The real-time compression distance of the reset spring 103 detected by the infrared distance meter 104 is judged through the central control module, the real-time cylinder running state is determined, when the real-time compression distance of the reset spring 103 reaches the maximum compression distance, the poppet valve is in an overpressure running state, the central control module judges the real-time compression distance again to determine whether the pressure relief valve 204 is opened to relieve pressure of the main cylinder 201, on the basis of guaranteeing normal running of the poppet valve, opening of the pressure relief valve 204 is automatically determined, gas break of the main cylinder 201 due to the overpressure state is avoided, when the real-time compression distance of the reset spring 103 does not exceed the minimum compression distance, the poppet valve is in an inoperative state, judgment of gas break protection of the poppet valve is not needed, and the situation of false alarm is effectively reduced.
Specifically, a unit detection time length t is set in the central control module, a pressure gauge 206 is set in the main cylinder 201, when the central control module determines that the real-time compression distance of the return spring 103 is between the minimum compression distance and the maximum compression distance, the pressure gauge 206 detects the real-time pressure in the main cylinder 201 and transmits the detection result to the central control module in real time, and the central control module calculates the real-time air pressure variation Ps of the main cylinder 201 in the unit detection time length t, wherein Ps = P2-P1, P1 is the current real-time pressure in the main cylinder 201, and P2 is the real-time pressure in the main cylinder 201 after the unit detection time length t.
Through setting up the unit detection duration in the central control module, the real-time atmospheric pressure variation of master cylinder 201 is calculated according to the unit detection duration and the real-time pressure in master cylinder 201 to the central control module, can judge the state of poppet valve fast according to the real-time atmospheric pressure variation of master cylinder 201, has not only improved the efficiency of judging the poppet valve, makes the accuracy of judged result greatly improve moreover, has reduced the circumstances that the protection of poppet valve outage judges the wrong report.
Specifically, the central control module is provided with a standard fluctuation pneumatic pressure variation Pb of the master cylinder 201, where Pb > 0, and the central control module can compare the absolute value of the calculated real-time pneumatic pressure variation Ps with the standard fluctuation pneumatic pressure variation Pb,
when the absolute value of the real-time air pressure variation Ps is less than or equal to Pb, the central control module judges that the absolute value of the real-time air pressure variation Ps does not exceed the standard fluctuation air pressure variation Pb, the central control module judges that the main air cylinder 201 is in a standard pressure holding state, and the central control module does not perform air-break protection judgment;
when the absolute value of the real-time air pressure variation Ps exceeds the standard fluctuation air pressure variation Pb, the central control module judges the real-time air pressure variation Ps to determine the state of the master cylinder 201.
Through setting up standard fluctuation atmospheric pressure variable quantity in the central control module, and compare the absolute value of the real-time atmospheric pressure variable quantity of master cylinder 201 with standard fluctuation atmospheric pressure variable quantity, on the one hand, carry out the absolute value processing to real-time atmospheric pressure variable quantity and can more accurately show the pressure boost and decompression condition in master cylinder 201, avoid many times to judge, on the other hand, the standard fluctuation atmospheric pressure variable quantity that sets up can eliminate when judging master cylinder 201 real-time atmospheric pressure variable quantity, the influence of the pressure in master cylinder 201 because of temperature, the fluid medium in the external pipeline to the reverse pressure of valve rod 101 and poppet valve self vibration, when not influencing the poppet valve and taking place the outage, judge the precision, avoided the problem of the alarm of poppet valve outage that multiple factor leads to effectively when not influencing the poppet valve and break gas protection and judge the accuracy that improves the protection of the outage.
Specifically, when the central control module determines that the absolute value of the real-time air pressure variation Ps exceeds the standard fluctuation air pressure variation Pb, the central control module determines the real-time air pressure variation Ps,
if Ps is less than 0, the central control module determines that the master cylinder 201 is in a decompression state, and the central control module determines the state of the pressure relief valve 204 to determine whether the master cylinder 201 is in a gas-off state;
if Ps is greater than 0, the central control module determines that the main cylinder 201 is in a pressurization state, determines that the poppet valve operates normally, and does not perform gas-break protection determination.
The master cylinder 201 is determined to be in a decompression state or a pressurization state through the determination of the master control module on the positive value and the negative value of the real-time air pressure variation of the master cylinder 201, when the master cylinder 201 is in the pressurization state and is in a standard operation state, the air cut-off phenomenon is less generated, even if the air cut-off occurs during the pressurization, the central control module can also rapidly determine the air cut-off condition of the master cylinder 201 according to the real-time air pressure variation of the master cylinder 201 during the air cut-off, therefore, when the master cylinder 201 is in the pressurization state, the determination process of poppet valve air cut-off protection is not executed, the determination complexity is effectively reduced, and meanwhile, the service life of the central control module is prolonged.
Specifically, when the center control module determines that the master cylinder 201 is in the pressure reduction state, the center control module acquires the state of the pressure relief valve 204 and determines,
if the pressure relief valve 204 is in an open state, the central control module judges that the main cylinder 201 normally operates without performing gas-break protection;
if the pressure relief valve 204 is in a closed state, the central control module determines that the master cylinder 201 is in an air-break state, and the central control module determines the real-time air pressure variation Ps of the master cylinder 201 to determine an air-break protection mode.
When the main cylinder 201 is in a decompression state, the state of the pressure relief valve 204 is judged, if the pressure relief valve 204 is in an opening state, the poppet valve is in a normal pressure relief state, therefore, the air-break protection is not carried out, and when the pressure relief valve 204 is in a closing state, the central control module judges that the main cylinder 201 is in an air-break state, determines an air-break protection mode according to the real-time air pressure variation of the main cylinder 201, and avoids influencing the normal operation of the poppet valve.
Specifically, the central control module is provided with a compensable air pressure variation Pk of the auxiliary air cylinder 203, wherein Pk is larger than 0, when the central control module judges that the main air cylinder 201 is disconnected, the central control module compares the absolute value of the real-time air pressure variation Ps with the compensable air pressure variation Pk,
when the absolute value Ps is less than or equal to Pk, the central control module determines that the real-time air pressure variation of the main air cylinder 201 does not exceed the compensatable air pressure variation, the central control module controls the opening valve 202 to open, air is supplied to the main air cylinder 201 through the auxiliary air cylinder 203, and the central control module controls the alarm indicator lamp 302 to give an alarm;
when the absolute value of Ps is greater than Pk, the central control module judges that the real-time air pressure variation of the main air cylinder 201 exceeds the compensable air pressure variation, the central control module controls the electric clamping pin 301 to pop up and clamp with the limit clamping groove 106, the lift valve is subjected to air-off protection, and the alarm indicator lamp 302 is controlled to give an alarm.
When the central control module determines that the main cylinder 201 is in a gas failure state, the central control module compares the real-time air pressure variation with the compensatable air pressure variation of the auxiliary cylinder 203, when the real-time air pressure variation does not exceed the compensatable air pressure variation, the air leakage and gas failure condition of the main cylinder 201 in a small degree is shown, therefore, the auxiliary cylinder 203 supplies air to the main cylinder 201 by opening the opening valve 202, the normal operation of the poppet valve is maintained, meanwhile, the alarm indicator lamp 302 gives an alarm, when the real-time air pressure variation exceeds the compensatable air pressure variation, the air failure degree of the main cylinder 201 is shown to be serious, or the air pressure in the auxiliary cylinder 203 is insufficient, the pressure can not be supplemented, therefore, the valve rod 101 is fixed by controlling the electric bayonet lock 301 to pop up, the poppet valve is kept in the current operation state, and then the alarm indicator lamp 302 gives an alarm to prompt management for maintenance.
Specifically, the compensatable air pressure variation Pk set in the central control module is a calculated value of the central control module, and the calculation mode is Pk = Pf-Pe;
where Pf is the real-time air pressure in the auxiliary cylinder 203, and Pe is the air pressure in the main cylinder 201 when the central control module determines that the main cylinder 201 is disconnected.
Specifically, the central control module is provided with a maximum opening Ca of the opening valve 202, and when the central control module controls the opening valve 202 to open to replenish air into the main cylinder 201, the central control module sets the real-time opening of the opening valve 202 to Cs, cs = Ca × (| Ps |/Pk).
The amount of variation of the compensatable air pressure in the central control module is influenced by the real-time air pressure in the auxiliary air cylinder 203, when the auxiliary air cylinder 203 supplements air in the main air cylinder 201, the real-time air pressure in the auxiliary air cylinder 203 decreases along with the increase of the air supplementing time length, so the amount of variation of the compensatable air pressure in the central control module is also a real-time variation value, when the amount of variation of the real-time air pressure exceeds the amount of variation of the compensatable air pressure, the electric bayonet lock 301 still needs to be controlled to pop out, the valve rod 101 is fixed, the poppet valve keeps the current operation state, and the air-break protection is performed, when the central control module controls the opening valve 202 to open, the real-time opening of the opening valve 202 is controlled according to the amount of variation of the real-time air pressure in the main air cylinder 201 and the amount of variation of the compensatable air pressure, thereby ensuring the normal operation of the poppet valve.
Specifically, the pressure relief opening of the pressure relief valve 204 is adjustable, the central control module is provided with a standard overpressure pressure relief opening Cr of the pressure relief valve 204 and a standard overpressure distance Hc, wherein Hc is greater than Ha, when the central control module determines that the real-time compression distance of the return spring 103 has reached the maximum compression distance, the central control module compares the real-time compression distance Hs of the return spring 103 with the standard overpressure distance Hc,
when Hs is larger than or equal to Hc, the central control module judges that the real-time compression distance of the reset spring 103 reaches a standard overpressure distance, the central control module opens the pressure relief valve 204 to relieve pressure, and the opening of the pressure relief valve 204 is adjusted and set to be Cv, wherein Cv = Cr x [1+ (Hs-Hc)/Hc ];
when Hs is less than Hc, the central control module judges that the real-time compression distance of the return spring 103 does not reach the standard overpressure distance, the central control module controls the air compressor 205 to stop feeding air into the main cylinder 201, and the central control module does not control the pressure relief valve 204 to be opened.
The standard overpressure pressure relief opening and the standard overpressure distance are set in the central control module, when the poppet valve is in an overpressure operation state, the real-time compression distance is compared with the standard overpressure distance, when the real-time compression distance of the reset spring 103 does not reach the standard overpressure distance, the air compressor 205 is controlled to stop operating, the pressure in the main air cylinder 201 is controlled to be stable, normal operation of the poppet valve is guaranteed, when the real-time compression distance of the reset spring 103 reaches the standard overpressure distance, the opening of the pressure relief valve 204 is controlled through the central control module, pressure relief of the main air cylinder 201 is carried out, gas break caused by overlarge pressure in the main air cylinder 201 is avoided, and the gas break situation of the poppet valve is reduced.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can be within the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A poppet valve with a gas-break protection device is characterized by comprising,
the actuating mechanism is used for driving the valve plate to move through the valve rod and controlling the flow rate of fluid media in an external pipeline, a return spring is sleeved on the outer side of the valve rod and used for controlling the valve rod to reset, an infrared distance meter is arranged at the bottom of the return spring and used for detecting the real-time compression distance of the return spring, a driving block is arranged at the top of one end of the valve rod, and a limiting clamping groove is formed in the other end of the valve rod;
the driving mechanism is used for controlling the position of the driving block in the main cylinder by adjusting the air pressure in the main cylinder, the valve rod is driven to move by the driving block, one side of the main cylinder is connected with the auxiliary cylinder through an opening valve, the other side of the main cylinder is provided with a pressure relief valve for controlling the air pressure in the main cylinder, the upper part of the main cylinder is provided with an air compressor, and the air compressors are respectively connected with the main cylinder and the auxiliary cylinder and used for respectively controlling the air pressure in the main cylinder and the auxiliary cylinder;
the gas-cut-off protection device is used for limiting and fixing the valve rod by controlling the clamping of the electric clamping pin and the limiting clamping groove, and further comprises an alarm indicator lamp for giving a gas-cut-off alarm;
and the central control module is respectively connected with the actuating mechanism, the driving mechanism and the gas-break protection device, can judge the real-time compression distance of the reset spring, determines the operation state of the poppet valve, judges whether the main cylinder is in the gas-break state or not according to the real-time air pressure variation of the main cylinder in unit detection time and whether the pressure relief valve is in the open state or not when the poppet valve is judged to be in the standard operation state by the central control module, determines to carry out gas-supplementing type gas-break protection into the main cylinder through the auxiliary cylinder or carry out gas-break protection through popping of the electric bayonet lock and clamping with the limiting clamping groove according to the compensatable air pressure variation of the auxiliary cylinder when the main cylinder is judged to be in the gas-break state, and controls the alarm indicator lamp to alarm when the gas-break protection is carried out.
2. The poppet valve with the gas-break protection device of claim 1, wherein the central control module is provided therein with a minimum compression distance Ha and a maximum compression distance Hz of the return spring, wherein Ha < Hz, the central control module obtains a real-time compression distance Hs of the return spring through the infrared distance meter, the central control module compares the real-time compression distance Hs of the return spring with the minimum compression distance Ha and the maximum compression distance Hz,
when Hs is less than or equal to Ha, the central control module judges that the real-time compression distance of the return spring does not exceed the minimum compression distance, the central control module judges that the poppet valve does not operate, and the gas-cut protection judgment is not carried out;
when Ha is larger than Hs and smaller than Hz, the central control module judges that the real-time compression distance of the reset spring is between the minimum compression distance and the maximum compression distance, the central control module judges that the poppet valve is in a standard operation state, and the central control module calculates the real-time air pressure variation in the main cylinder and judges the real-time air pressure variation to determine whether the poppet valve is in an air-break state;
when Hs is larger than or equal to Ha, the central control module judges that the real-time compression distance of the reset spring reaches the maximum compression distance, the central control module judges that the poppet valve is in an overpressure operation state, the central control module judges whether the pressure relief valve is opened or not according to the real-time compression distance of the reset spring to relieve the pressure of the main cylinder, and the opening of the pressure relief valve is adjusted in real time according to the real-time compression distance of the reset spring.
3. The poppet valve with the gas cut-off protection device according to claim 2, wherein a unit detection time period t is set in the central control module, a pressure gauge is set in the main cylinder, when the central control module determines that the real-time compression distance of the return spring is between the minimum compression distance and the maximum compression distance, the pressure gauge will detect the real-time pressure in the main cylinder and transmit the detection result to the central control module in real time, and the central control module calculates a real-time air pressure variation Ps of the main cylinder in the unit detection time period t, ps = P2-P1, wherein P1 is the current real-time pressure in the main cylinder, and P2 is the real-time pressure in the main cylinder after the unit detection time period t.
4. The poppet valve with the gas shut-off protection device according to claim 3, wherein the central control module is provided therein with a standard fluctuation gas pressure variation Pb of the master cylinder, wherein Pb > 0, and the central control module is capable of comparing the absolute value of the calculated real-time gas pressure variation Ps with the standard fluctuation gas pressure variation Pb,
when the absolute value of the real-time air pressure variation Ps is less than or equal to Pb, the central control module judges that the absolute value of the real-time air pressure variation Ps does not exceed the standard fluctuation air pressure variation Pb, the central control module judges that the master cylinder is in a standard pressure holding state, and the central control module does not carry out air-break protection judgment;
and when the absolute value of the real-time air pressure variation Ps exceeds the standard fluctuation air pressure variation Pb, the central control module judges the real-time air pressure variation Ps to determine the state of the master cylinder.
5. The poppet valve with the gas shut-off protection device according to claim 4, wherein the central control module determines the real-time pressure variation Ps when the central control module determines that the absolute value of the real-time pressure variation Ps has exceeded the standard fluctuation pressure variation Pb,
if Ps is less than 0, the central control module judges that the master cylinder is in a decompression state, and the central control module judges the state of the pressure relief valve to determine whether the master cylinder is in a gas-off state;
if Ps is larger than 0, the central control module judges that the main cylinder is in a pressurization state, the central control module judges that the poppet valve operates normally, and the air-break protection judgment is not carried out.
6. The poppet valve with a gas shutoff guard according to claim 5, wherein the center control module acquires the state of the relief valve and makes a determination when the center control module determines that the master cylinder is in a pressure-reduced state,
if the pressure relief valve is in an open state, the central control module judges that the main cylinder normally operates and does not perform gas-break protection;
if the pressure relief valve is in a closed state, the central control module judges that the main cylinder is in an air break state, and the central control module judges the real-time air pressure variation Ps of the main cylinder to determine an air break protection mode.
7. The poppet valve with the gas shutoff guard according to claim 6, wherein the central control module has a compensatable air pressure variation Pk of the auxiliary cylinder, where Pk > 0, and compares an absolute value of the real-time air pressure variation Ps with the compensatable air pressure variation Pk when the central control module determines that the main cylinder has a gas shutoff,
when the absolute value Ps is less than or equal to Pk, the central control module judges that the real-time air pressure variation of the main air cylinder does not exceed the compensatable air pressure variation, the central control module controls the opening valve to open, air is supplied into the main air cylinder through the auxiliary air cylinder, and the central control module controls the alarm indicator lamp to alarm;
when Ps is larger than Pk, the central control module judges that the real-time air pressure variation of the master cylinder exceeds the compensatable air pressure variation, and the central control module controls the electric clamping pin to pop out and clamp with the limit clamping groove, so that the lift valve is protected against air interruption, and the alarm indicator lamp is controlled to give an alarm.
8. The poppet valve with the gas cutoff protection device according to claim 7, wherein the amount of the compensatable air pressure change Pk provided in the central control module is a calculated value of the central control module in a manner of Pk = Pf-Pe;
and Pf is the real-time air pressure in the auxiliary cylinder, and Pe is the air pressure in the main cylinder when the central control module determines that the main cylinder is disconnected.
9. The poppet valve with the gas shutoff guard according to claim 8, wherein a maximum opening Ca of the opening valve is provided in the central control module, and when the central control module controls the opening of the opening valve to supplement gas into the main cylinder, the central control module sets a real-time opening of the opening valve to Cs, cs = Ca x (| Ps |/Pk).
10. A poppet valve with a gas shut-off protection device according to claim 2, wherein the relief opening of the relief valve is adjustable, a standard overpressure relief opening Cr of the relief valve is provided in the central control module, and a standard overpressure distance Hc, where Hc > Ha, the central control module compares the real-time compression distance Hs of the return spring with the standard overpressure distance Hc when the central control module determines that the real-time compression distance of the return spring has reached the maximum compression distance,
when Hs is larger than or equal to Hc, the central control module judges that the real-time compression distance of the reset spring reaches a standard overpressure distance, the central control module opens the pressure relief valve to relieve pressure, and the opening of the pressure relief valve is adjusted and set to Cv, wherein Cv = Cr x [1+ (Hs-Hc)/Hc ];
when Hs is smaller than Hc, the central control module judges that the real-time compression distance of the reset spring does not reach the standard overpressure distance, the central control module controls the air compressor to stop air intake into the main cylinder, and the central control module does not control the pressure relief valve to be opened.
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| CN112361050A (en) * | 2021-01-12 | 2021-02-12 | 山东道永盛信息科技有限公司 | Poppet valve with air-break protection device |
| CN214197409U (en) * | 2020-12-14 | 2021-09-14 | 芜湖市金汤铸造有限公司 | Spherical check valve |
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| SU808755A1 (en) * | 1976-03-30 | 1981-02-28 | Винницкий политехнический институт | Flowrate controlling valve |
| US4535804A (en) * | 1982-02-25 | 1985-08-20 | Regioninvest I Norr Ab | Conduit-break valve for a pressure conduit or hose with a surrounding protective conduit or hose |
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