CN111895132A - High-temperature-resistant double-feedback double-redundancy electric control air pressure reversing valve - Google Patents
High-temperature-resistant double-feedback double-redundancy electric control air pressure reversing valve Download PDFInfo
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- CN111895132A CN111895132A CN201911324099.XA CN201911324099A CN111895132A CN 111895132 A CN111895132 A CN 111895132A CN 201911324099 A CN201911324099 A CN 201911324099A CN 111895132 A CN111895132 A CN 111895132A
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
- F16J15/30—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of carbon
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/0624—Lift valves
- F16K31/0627—Lift valves with movable valve member positioned between seats
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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
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
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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
- F16K37/0025—Electrical or magnetic means
- F16K37/005—Electrical or magnetic means for measuring fluid parameters
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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a high-temperature-resistant double-feedback double-redundancy electric control pneumatic reversing valve, relates to the technical field of pneumatic reversing valves of high-temperature working media in high-temperature environments, and solves the technical problems that a traditional pneumatic reversing valve in the prior art cannot normally work at the temperature of 650 ℃ media, position feedback is carried out by a microswitch, and the microswitch is prone to failure when the traditional pneumatic reversing valve is impacted under high pressure. The technical characteristics include that the valve comprises a valve body, a piston assembly, a sealing assembly, a temperature sensor, an electromagnetic directional valve, a microswitch and a switching plate, wherein the temperature sensor is used for detecting the temperature of a gas outlet, the electromagnetic directional valve is fixedly installed with the valve body and is used for controlling the opening of high-temperature and high-pressure control air, and the microswitch is installed on the valve body through the switching plate and is used for detecting whether the piston assembly moves in place or not. The micro-switch has the effects of realizing the sealing of 650 ℃ high-temperature air and preventing the micro-switch from being damaged by larger impact force.
Description
Technical Field
The invention relates to the technical field of air pressure reversing valves for high-temperature working media in high-temperature environments, in particular to a high-temperature-resistant double-feedback double-redundancy electric control air pressure reversing valve.
Background
The reversing control valves are various in types, different in structure and various in control mode. The pneumatic control reversing valve switches the main valve by taking an external pneumatic signal as power to control the reversing or opening and closing of the loop. The applied pressure is referred to as the control pressure. According to different pressure applying modes, the method can be divided into pressurization control reversing, pressure relief control reversing, differential pressure control reversing, time delay control reversing, pulse control reversing and the like. The traditional air pressure reversing valve cannot normally work at the medium temperature of 650 ℃, position feedback is carried out by the micro switch, and the micro switch is easy to break down when impacting under high pressure.
Disclosure of Invention
The invention provides a high-temperature-resistant double-feedback double-redundancy electric control pneumatic reversing valve, which aims to solve the technical problems that the traditional pneumatic reversing valve in the prior art cannot normally work at the medium temperature of 650 ℃, the microswitch is used for position feedback, and the microswitch is easy to break down when impacted under high pressure.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a high temperature resistant double-feedback double-redundancy electronic control pneumatic reversing valve comprises: the high-temperature high-pressure air inlet, the low-temperature low-pressure air inlet and the gas outlet are communicated with each other, and the high-temperature high-pressure control air inlet channel is arranged at the other end of the valve body;
the gas outlet is provided with a tee joint, and the tee joint is provided with a temperature sensor which is used for collecting the gas temperature of the gas outlet;
the piston assembly is arranged in the valve body and reciprocates in the valve body, and is used for controlling the on-off of the high-temperature high-pressure air inlet and the gas outlet and the on-off of the low-temperature low-pressure air inlet and the gas outlet;
the sealing assembly is used for sealing a gap between the piston assembly and the interior of the valve body;
the electromagnetic reversing valve is fixedly arranged with the valve body and is used for controlling the opening of high-temperature and high-pressure control air;
the microswitch is arranged on the valve body through the adapter plate and is used for detecting whether the piston assembly moves in place or not;
the valve body also comprises a buffer mechanism for reducing the impact force on the microswitch;
the piston assembly further comprises a compression spring, and the compression spring is used for resetting the piston assembly;
wherein, the seal assembly is a graphite seal assembly.
Further, the piston assembly includes: the two sides of the double-side cone valve are cone structures, when the double-side cone valve moves to one side of the high-temperature high-pressure air inlet, the conical surfaces of the double-side cone valve are attached to the inner wall of the valve body and sealed, and at the moment, the low-temperature low-pressure air inlet is communicated with the air outlet;
when the double-side cone valve moves towards one side of the low-temperature low-pressure air inlet, the conical surface of the double-side cone valve is attached to the inner wall of the valve body and sealed, and at the moment, the high-temperature high-pressure air inlet is communicated with the gas outlet;
one end of the piston rod is coaxial and integrated with the cone of the bilateral cone valve on one side of the low-temperature low-pressure air inlet;
and the piston is fixedly connected with the other end of the piston rod.
Further, the buffer mechanism includes: the ejector rod is slidably mounted on the valve body, one end of the ejector rod is communicated with the piston cavity, the other end of the ejector rod is arranged outside the valve body and fixedly provided with a trigger plate, and the trigger plate is as high as the microswitch;
and a buffer spring is arranged between the trigger plate and the adapter plate.
Further, the graphite sealing assembly comprises hard graphite which is in a circular ring structure and is arranged inside the sealing groove of the piston, and the hard graphite is used for supporting the end face;
the flexible graphite is of a circular ring structure with an opening, the flexible graphite and the rigid graphite are arranged side by side, and the flexible graphite is arranged outside a sealing groove of the piston;
the metal piston ring is of a C-shaped structure and is embedded in the flexible graphite, and the metal piston ring is used for ensuring that the flexible graphite is tightly attached to the inner wall of the valve body.
Further, the tip of piston still includes the baffle, the baffle with flexible graphite laminating setting and with piston fixed connection, the baffle is used for preventing graphite seal assembly and piston from breaking away from.
Further, the graphite sealing assembly comprises hard graphite which is in a circular ring structure, the hard graphite is embedded in the valve body and sleeved on the piston rod, and the hard graphite is used for supporting the end face;
the flexible graphite is of a circular ring structure with openings, two groups of flexible graphite are sequentially embedded in the valve body side by side on one side of the rigid graphite and sleeved on the piston rod, the openings of the two groups of flexible graphite are not on the same straight line, and the flexible graphite is used for sealing;
the metal piston ring is of a C-shaped structure and wraps the flexible graphite outer ring, and the metal piston ring is used for ensuring that the flexible graphite is tightly attached to the circumferential surface of the piston rod.
Further, the thread baffle is installed to valve body internal thread, and the thread baffle is the ring type structure that has the external screw thread, external screw thread and valve body inner wall threaded connection, and the piston rod passes the hole of thread baffle, and the thread baffle is used for preventing that graphite subassembly and valve body break away from.
The invention has the following beneficial effects:
1. the main valve is a double-side cone valve structure, the sealing is reliable when the main valve is closed, and the flow resistance of the cone surface is smaller when the main valve is opened.
2. The main valve is indirectly controlled to change direction by adopting the electromagnetic valve and the piston, so that the control force during the change direction can be effectively improved, namely the main valve can be driven to change direction by a small control pressure.
3. The dynamic and static seals adopt a graphite sealing structure and a metal C-shaped sealing ring, and can realize the sealing of 650 ℃ high-temperature air.
4. The microswitch is adopted to output the feedback signal of the in-place reversing, so that the system can know the information whether the main valve is in the in-place reversing in time, and the system can be conveniently and comprehensively controlled.
5. And a temperature sensor is adopted to monitor the outlet temperature, and the air temperature at the outlet of the reversing valve is fed back to the system in real time, so that the system can conveniently judge whether the main valve is reversed according to a given signal.
6. A spring is arranged between the ejector rod and the microswitch to serve as buffering, so that the microswitch can be prevented from being damaged due to larger impact force.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a structural diagram of a high temperature resistant dual-feedback dual-redundancy electrically controlled pneumatic directional control valve of the present invention;
FIG. 2 is a schematic sealing diagram of a graphite sealing assembly of a high temperature resistant dual-feedback dual-redundancy electrically controlled pneumatic directional valve according to the present invention;
FIG. 3 is a schematic view of a graphite seal assembly in a valve body of a high temperature resistant dual feedback dual redundancy electrically controlled pneumatic directional valve of the present invention;
fig. 4 is a schematic diagram of a high-temperature-resistant dual-feedback dual-redundancy electrically-controlled pneumatic directional valve according to the present invention.
The reference numerals in the figures denote:
1. a valve body; 101. a high temperature and high pressure air inlet; 102. a gas outlet; 103. a tee joint; 104. a temperature sensor; 105. a low temperature, low pressure air inlet; 106. a high temperature high pressure control air inlet passage; 107. a fourth space; 108. a third space; 109. a top rod; 110. a trigger plate; 111. a buffer spring; 112. an adapter plate; 113. a microswitch; 114. a threaded baffle; 115. a second space; 116. a first space; 2. a piston assembly; 201. a bilateral cone valve; 202. a piston rod; 203. a piston; 204. a baffle plate; 205. a compression spring; 3. an electromagnetic directional valve; 301. a high temperature and high pressure control air inlet; 4. a seal assembly; 401. flexible graphite; 402. hard graphite; 403. a metal piston ring; 404. and (4) opening.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a high temperature resistant dual feedback dual redundancy electrically controlled pneumatic directional valve includes: the high-temperature high-pressure air control valve comprises a valve body 1, wherein one end of the valve body 1 is provided with a high-temperature high-pressure air inlet 101, one side of the valve body 1 is provided with a low-temperature low-pressure air inlet 105 and a gas outlet 102, the high-temperature high-pressure air inlet 101, the low-temperature low-pressure air inlet 105 and the gas outlet 102 are communicated with each other, and the other end of the valve body 1 is provided with a high-temperature high-pressure;
a tee joint 103 is arranged at the gas outlet 102, a temperature sensor 104 is arranged at the tee joint 103, and the temperature sensor 104 is used for detecting the gas temperature at the gas outlet 102;
the piston assembly 2 is arranged inside the valve body 1 and reciprocates inside the valve body 1, and the piston assembly 2 is used for controlling the on-off of the high-temperature high-pressure air inlet 101 and the gas outlet 102 and the on-off of the low-temperature low-pressure air inlet 105 and the gas outlet 102;
the sealing assembly 4 is used for sealing a gap between the piston assembly 2 and the interior of the valve body 1;
the electromagnetic directional valve 3 is fixedly arranged with the valve body 1 and is used for controlling the opening of high-temperature and high-pressure control air;
the microswitch 113 is arranged on the valve body 1 through the adapter plate 112, and is used for detecting whether the piston assembly 2 moves in place;
the valve body 1 also comprises a buffer mechanism for reducing the impact force on the microswitch;
wherein, the piston assembly 2 further comprises a compression spring 205, and the compression spring 205 is used for resetting the piston assembly 2;
wherein the seal assembly 4 is a graphite seal assembly.
The working principle is as follows: the electromagnetic directional valve 3 is provided with a high-temperature large-pressure control air inlet 301 communicated with high-temperature large-pressure control air, the compression spring 205 is arranged in the third space 108, when the electromagnetic directional valve 3 is powered off, the fourth space 107 inside the valve body 1 is communicated with the outside atmosphere, the piston assembly 2 is not influenced by the high-temperature large-pressure control air, the piston assembly 2 is positioned at the right limit position under the action of the compression spring 205, and meanwhile, the piston assembly 2 closes the low-temperature low-pressure air inlet 105, so that the high-temperature large-pressure air inlet 101 is communicated with the gas outlet 102; when the electromagnetic directional valve 3 is electrified, the high-temperature high-pressure control air inlet 301 is communicated with the high-temperature high-pressure control air inlet channel 106, high-temperature high-pressure control air enters the fourth space 107 and overcomes the spring force and the friction force of the compression spring 205 in the third space 108, so that the piston assembly 2 moves leftwards, and when the piston assembly 2 moves to the left limit position, the high-temperature high-pressure air inlet 101 is closed by the piston assembly 2, so that the low-temperature low-pressure air inlet 105 is communicated with the gas outlet 102; simultaneously, piston assembly 2 triggers micro-gap switch 113, makes micro-gap switch 113 send electrical signal, and valve body 1 still includes the buffer gear who is used for reducing the impact force to micro-gap switch 113, through setting up buffer gear, can prevent that micro-gap switch 113 from receiving great impact force and damaging. Because the aerospace power system is adopted, an electric signal sent by the microswitch 113 can be transmitted to the power system for system judgment, the system can make own judgment according to other data, the aerospace power system has higher working temperature, a sealing ring made of common materials is not suitable for serving as the sealing component 4, and the graphite sealing component is used for ensuring the normal sealing work of the aerospace power system at the medium temperature of 650 ℃; the microswitch 113 is adopted to output the feedback signal of the piston assembly 2 in the reversing position, so that the system can know the information whether the piston assembly 2 is in the reversing position in time, and the system can be conveniently controlled comprehensively. Wherein, the microswitch 113 is manufactured by honeywell, and the model is as follows: 5HM 1; the electromagnetic directional valve 3 is manufactured by a seven-factory with the model number of 4 WE-E-3.
The tee joint 103 is arranged at the gas outlet 102, so that high-temperature high-pressure air or low-temperature low-pressure air can be communicated with other devices, the tee joint 103 is convenient for connecting pipelines, and meanwhile, a high-temperature-resistant temperature sensor 104 is also arranged, so that the temperature at the gas outlet 102 can be conveniently acquired, and then the acquired data are transmitted to a power system; the high-temperature resistant temperature sensor 104 feeds the air temperature of the gas outlet 102 back to the controller in real time so that the system can judge whether the main valve is converted according to a given signal; the temperature sensor 104 is adopted to monitor the temperature of the gas outlet 102, the air temperature of the gas outlet 102 is fed back to the system in real time, and the system can judge the working state of the product according to the air temperature so as to be convenient for the system to judge whether the main valve is reversed according to a given signal. The micro switch 113 and the temperature sensor 104 are two independent feedback forms, namely, double feedback and double redundancy control, when one feedback mechanism fails, the other feedback mechanism can continuously feed back signals to the controller, so that the system can monitor the working state of the reversing valve conveniently, when the micro switch 113 fails, namely the specific position of the piston assembly 2 cannot be judged, the specific position of the piston assembly 2 can be known through the temperature of the gas outlet 102 collected by the temperature sensor 104, wherein the model of the temperature sensor 301 is G104F-1000.
The piston assembly 2 includes: the double-side cone valve 201, two ends of the double-side cone valve 201 are cone structures, when the double-side cone valve 201 moves to one side of the high-temperature high-pressure air inlet 101, the conical surface of the double-side cone valve 201 is attached to the inner wall of the valve body 1 and sealed, and at the moment, the low-temperature low-pressure air inlet 105 is communicated with the air outlet 102;
when the double-side cone valve 201 moves towards one side of the low-temperature low-pressure air inlet 105, the conical surface of the double-side cone valve 201 is attached to the inner wall of the valve body 1 and sealed, and at the moment, the high-temperature high-pressure air inlet 101 is communicated with the gas outlet 102;
one end of the piston rod 202 is coaxially integrated with the cone of the double-side cone valve 201 on one side of the low-temperature low-pressure air inlet 105;
and the piston 203 is fixedly connected with the other end of the piston rod 202.
The working principle is as follows: the valve body 1 is divided into a first space 116, a second space 115, a third space 108 and a fourth space 107, wherein the gas outlet 102 and the double-sided cone valve 201 are in the first space 116, the low-temperature low-pressure air inlet 105 is in the second space 115, the double-sided cone valve 201 moves in the first space 116 along the length direction of the valve body 1, when the double-sided cone valve 201 is at the left end of the first space 116, the conical surface of the double-sided cone valve 201 is attached and sealed with the inner wall of the valve body 1, (the conical surface of the double-sided cone valve 201 is attached and sealed with the ridge line of the inner wall of the valve body 1, the sealing effect of the surface contact is better because of deformation, namely the line contact is not the surface contact, the surface contact is better) the high-temperature high-pressure air inlet 101 is closed, the low-temperature low-pressure air inlet 105 is communicated with the gas outlet 102, when the double-sided cone valve 201 is at the right end of the first space 116, the, the low-temperature low-pressure air inlet 105 is closed, the high-temperature high-pressure air inlet 101 is communicated with the gas outlet 102, the piston rod 202 and the double-side cone valve 201 are of a coaxial and integrated structure and are positioned between the double-side cone valve 201 and the piston 203, when the electromagnetic directional valve 3 is electrified, the high-temperature high-pressure control air inlet 301 is communicated with the high-temperature high-pressure control air inlet channel 106, high-temperature high-pressure control air enters the fourth space 107 and overcomes the spring force and the friction force of a compression spring 205 positioned in the third space 108, so that the piston assembly 2 moves leftwards, when the piston assembly moves to a left limit position, the double-side cone valve 201 is positioned at the left end of the first space 116, the conical surface of the double-side cone valve 201 is attached to and sealed with the inner wall of the valve body 1, the high-temperature high-pressure air; when the electromagnetic directional valve 3 is powered off, the fourth space 107 inside the valve body 1 is communicated with the outside atmosphere, the piston 203 on the piston assembly 2 is not controlled by high-temperature large-pressure control air, the compression spring 205 pushes the piston 203 to move under the action of the compression spring 205, so that the piston assembly 2 is positioned at the right limit position, the double-side cone valve 201 is arranged at the right end of the first space 116, the conical surface of the double-side cone valve 201 is attached to and sealed with the inner wall of the valve body 1, the low-temperature low-pressure air inlet 105 is closed, and at the moment, the high-temperature large-pressure air inlet 101 is communicated with the gas outlet 102; the two ends of the double-side cone valve 201 are cone-shaped structures, so that the double-side cone valve is reliably sealed when closed, and the flow resistance of the cone surface is smaller when opened; the electromagnetic directional valve 3 and the piston 203 indirectly control the piston assembly 2 to change direction, so that the control force during the direction change can be effectively improved, namely the piston assembly 2 can be driven to change direction by a small control pressure.
The buffer mechanism includes: the push rod 109 is slidably mounted on the valve body 1, one end of the push rod 109 is communicated with the piston cavity, the other end of the push rod 109 is arranged outside the valve body 1 and is fixedly provided with a trigger plate 110, and the trigger plate 110 is as high as the microswitch 113;
a buffer spring 111 is provided between the trigger plate 110 and the adapter plate 112.
The working principle is as follows: the ejector rod 109 can be inserted on the valve body 1 and can slide, one end of the ejector rod 109 is communicated with the third space 108, when the piston 203 moves leftwards, the piston 203 can be in contact with the ejector rod 109 and continuously extrudes the ejector rod 109, so that the ejector rod 109 moves leftwards, the ejector rod 109 drives the trigger plate 110 to move leftwards, the trigger plate 110 is in contact with the micro switch 113 and further triggers the micro switch 113, the trigger plate 110 is as high as the micro switch 113, the trigger plate 110 can be ensured to be in contact with the micro switch 113, the situation that the trigger plate cannot be touched is avoided, the buffer spring 111 is arranged between the trigger plate 110 and the adapter plate 112, the micro switch 113 can be prevented from being damaged due to large impact force by arranging the buffer spring 111, and the adapter plate 112 can be provided with an installation support for the buffer spring 111 besides the installation of the micro switch.
The graphite sealing component comprises hard graphite 402, the hard graphite 402 is in a circular ring structure, the hard graphite 402 is arranged inside the sealing groove of the piston 203, and the hard graphite 402 is used for supporting the end face;
the flexible graphite 401 is of a circular ring structure with an opening 404, the flexible graphite 401 and the hard graphite 402 are arranged side by side, and the flexible graphite 401 is arranged outside a sealing groove of the piston 203;
the metal piston ring 403 is of a C-shaped structure and is embedded in the flexible graphite 401, and the metal piston ring 403 is used for ensuring that the flexible graphite 401 is tightly attached to the inner wall of the valve body 1.
The end of the piston 203 further comprises a baffle 204, the baffle 204 is attached to the flexible graphite 401 and is fixedly connected with the piston 203, and the baffle 204 is used for preventing the graphite sealing assembly from being separated from the piston 203.
The working principle is as follows: the graphite seal assembly is sleeved in a seal groove of the piston 203, after the installation is finished, the end part of the piston 203 is fixed by the baffle 204, the graphite seal assembly is prevented from being separated from the piston 203, the seal assembly made of graphite can normally work at the medium temperature of 650 ℃, the reliability of the sealing performance is ensured, the elastic modulus of the rigid graphite 402 is low, the seal assembly is of a non-open circular ring structure and mainly plays a supporting role, because the seal assembly can be abraded in the working process, the metal piston ring 403 with a C-shaped structure is embedded in the flexible graphite 401, the elastic modulus of the flexible graphite 401 is high, the flexible graphite 401 can be ensured to be tightly attached to the inner wall of the valve body 1, the reliability of the sealing work is ensured, the opening 404 is further arranged on the flexible graphite 401, and the normal tensioning work of the metal piston ring 403 can be ensured by arranging the opening 404.
The graphite sealing assembly comprises hard graphite 402, the hard graphite 402 is in a circular ring structure, the hard graphite 402 is embedded in the valve body 1 and sleeved on the piston rod 202, and the hard graphite 402 is used for supporting the end face;
the flexible graphite 401 is of a circular ring structure with an opening 404, two groups of flexible graphite 401 are sequentially embedded in the valve body 1 side by side on one side of the rigid graphite 402 and sleeved on the piston rod 202, the openings 401 of the two groups of flexible graphite 401 are not on the same straight line, and the flexible graphite 401 is used for sealing;
the metal piston ring 403 is of a C-shaped structure and wraps the outer ring of the flexible graphite 401, and the metal piston ring 403 is used for ensuring that the flexible graphite 401 is tightly attached to the circumferential surface of the piston rod 202.
The threaded baffle 114 is installed to valve body 1 internal thread, and threaded baffle 114 is the ring type structure that has the external screw thread, and external screw thread and valve body 1 inner wall threaded connection, piston rod 202 pass the hole of threaded baffle 114, and threaded baffle 114 is used for preventing that graphite assembly and valve body 1 break away from.
Working principle, in order to prevent low temperature low pressure air from getting into third space 108, avoid low temperature low pressure air to cause the influence to piston assembly 2's motion, in the junction of second space 115 with third space 108, be provided with graphite seal assembly on the valve body 1, two sets of flexible graphite 401 are installed side by side, the opening 404 of two sets of flexible graphite 401 is not on same straight line, even gaseous entering the opening part of one of them flexible graphite 401, another flexible graphite 401 also can seal the gaseous effect of getting into, guarantee the sealed reliable of gaseous, set up opening 404, can guarantee the normal tight work that rises of metal piston ring 403, threaded baffle 114 and valve body 1 threaded connection, and be used for preventing that graphite assembly and valve body 1 from breaking away from.
In summary, the invention is a reversing valve which can lead two kinds of air with different pressures and temperatures to a required system according to control signals and realize double feedback, on one hand, the air temperature at the outlet of the reversing valve can be monitored in real time, and the temperature information is fed back to a controller in an electric signal form; and on the other hand, when the reversing valve completely introduces low-temperature and low-pressure air, an electric signal is output to the controller. The temperature of the working medium of the invention can reach 650 ℃, and the invention has two mutually independent feedback forms (a microswitch and a temperature sensor), when one feedback mechanism is in failure, the other feedback mechanism can continuously feed back signals to the controller, thereby being convenient for the system to monitor the working state of the reversing valve.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (7)
1. The utility model provides a high temperature resistant two automatically controlled atmospheric pressure switching-over valves of redundancy of feedback which characterized in that includes: the high-temperature high-pressure air control valve comprises a valve body (1), wherein one end of the valve body (1) is provided with a high-temperature high-pressure air inlet (101), one side of the valve body (1) is provided with a low-temperature low-pressure air inlet (105) and a gas outlet (102), the high-temperature high-pressure air inlet (101), the low-temperature low-pressure air inlet (105) and the gas outlet (102) are communicated with each other, and the other end of the valve body (1) is provided with a high-temperature high-pressure control air inlet channel (106;
a tee joint (103) is installed at the gas outlet (102), a temperature sensor (104) is installed at the tee joint (102), and the temperature sensor (104) is used for collecting the gas temperature of the gas outlet (102);
the piston assembly (2) is arranged inside the valve body (1) and reciprocates inside the valve body (1), and the piston assembly (2) is used for controlling the on-off of the high-temperature high-pressure air inlet (101) and the gas outlet (102) and the on-off of the low-temperature low-pressure air inlet (105) and the gas outlet (102);
a sealing assembly (4), the sealing assembly (4) being used for sealing a gap between the piston assembly (2) and the interior of the valve body (1);
the electromagnetic directional valve (3) is fixedly arranged with the valve body (1) and is used for controlling the opening of high-temperature and high-pressure control air;
the microswitch (113) is mounted on the valve body (1) through the adapter plate (112) and used for detecting whether the piston assembly (2) moves in place or not;
the valve body (1) further comprises a buffer mechanism for reducing impact force on the microswitch;
wherein the piston assembly (2) further comprises a compression spring (205), the compression spring (205) is used for resetting the piston assembly (2);
wherein the seal assembly (4) is a graphite seal assembly.
2. A high temperature resistant dual feedback dual redundancy electrically controlled pneumatic directional control valve according to claim 1, wherein said piston assembly (2) comprises: the two ends of the double-side cone valve (201) are in cone structures, when the double-side cone valve (201) moves towards one side of the high-temperature high-pressure air inlet (101), the conical surface of the double-side cone valve (201) is attached to the inner wall of the valve body (1) and sealed, and at the moment, the low-temperature low-pressure air inlet (105) is communicated with the gas outlet (102);
when the double-side cone valve (201) moves towards one side of the low-temperature low-pressure air inlet (105), the conical surface of the double-side cone valve (201) is attached to the inner wall of the valve body (1) and sealed, and at the moment, the high-temperature high-pressure air inlet (101) is communicated with the gas outlet (102);
one end of the piston rod (202) is coaxially integrated with a cone of the double-side cone valve (201) on one side of the low-temperature and low-pressure air inlet (105);
and the piston (203), and the piston (203) is fixedly connected with the other end of the piston rod (202).
3. The high temperature resistant dual feedback dual redundancy electrically controlled pneumatic directional control valve of claim 1, wherein said buffer mechanism comprises: the push rod (109) is slidably mounted on the valve body (1), one end of the push rod (109) is communicated with the piston cavity, the other end of the push rod (109) is arranged outside the valve body (1) and fixedly provided with a trigger plate (110), and the trigger plate (110) and the microswitch (113) are equal in height;
and a buffer spring (111) is arranged between the trigger plate (110) and the adapter plate (112).
4. The high-temperature-resistant dual-feedback dual-redundancy electrically-controlled pneumatic reversing valve according to claim 2, wherein the graphite sealing assembly comprises hard graphite (402), the hard graphite (402) is in a circular ring structure, the hard graphite (402) is arranged inside a sealing groove of the piston (203), and the hard graphite (402) is used for supporting an end face;
the flexible graphite (401) is of a circular ring structure with an opening (404), the flexible graphite (401) and the hard graphite (402) are arranged side by side, and the flexible graphite (401) is arranged outside a sealing groove of the piston (203);
metal piston ring (403), metal piston ring (403) are C type structure and inlay inside flexible graphite (401), metal piston ring (403) are used for guaranteeing that flexible graphite (401) closely laminates to valve body (1) inner wall.
5. The high-temperature-resistant double-feedback double-redundancy electrically-controlled pneumatic reversing valve as claimed in claim 4, wherein the end of the piston (203) further comprises a baffle (204), the baffle (204) is attached to the flexible graphite (401) and is fixedly connected with the piston (203), and the baffle (204) is used for preventing the graphite sealing assembly from being separated from the piston (203).
6. The high-temperature-resistant dual-feedback dual-redundancy electrically-controlled pneumatic reversing valve according to claim 2, wherein the graphite sealing assembly comprises hard graphite (402), the hard graphite (402) is in a circular ring structure, the hard graphite (402) is embedded inside the valve body (1) and is sleeved on the piston rod (202), and the hard graphite (402) is used for supporting an end face;
the flexible graphite (401) is of a circular ring structure with openings (404), two groups of flexible graphite (401) are sequentially embedded in the valve body (1) side by side on one side of the rigid graphite (402) and sleeved on the piston rod (202), the openings (401) of the two groups of flexible graphite (401) are not on the same straight line, and the flexible graphite (401) is used for sealing;
the piston rod structure comprises a metal piston ring (403), wherein the metal piston ring (403) is of a C-shaped structure and wraps the outer ring of the flexible graphite (401), and the metal piston ring (403) is used for ensuring that the flexible graphite (401) is tightly attached to the circumferential surface of the piston rod (202).
7. The high-temperature-resistant double-feedback double-redundancy electrically-controlled air pressure reversing valve according to claim 6, characterized in that a threaded baffle (114) is installed in the valve body (1) through threads, the threaded baffle (114) is of a circular ring type structure with external threads, the external threads are in threaded connection with the inner wall of the valve body (1), the piston rod (202) penetrates through an inner hole of the threaded baffle (114), and the threaded baffle (114) is used for preventing the graphite component from being separated from the valve body (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911324099.XA CN111895132A (en) | 2019-12-20 | 2019-12-20 | High-temperature-resistant double-feedback double-redundancy electric control air pressure reversing valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911324099.XA CN111895132A (en) | 2019-12-20 | 2019-12-20 | High-temperature-resistant double-feedback double-redundancy electric control air pressure reversing valve |
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| CN111895132A true CN111895132A (en) | 2020-11-06 |
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| CN201911324099.XA Pending CN111895132A (en) | 2019-12-20 | 2019-12-20 | High-temperature-resistant double-feedback double-redundancy electric control air pressure reversing valve |
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Cited By (1)
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| CN113565631A (en) * | 2021-08-17 | 2021-10-29 | 中国航发贵阳发动机设计研究所 | Aeroengine bleed air automatic control device |
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