CN113418045B - High-temperature-resistant electromagnetic valve - Google Patents
High-temperature-resistant electromagnetic valve Download PDFInfo
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- CN113418045B CN113418045B CN202110633802.6A CN202110633802A CN113418045B CN 113418045 B CN113418045 B CN 113418045B CN 202110633802 A CN202110633802 A CN 202110633802A CN 113418045 B CN113418045 B CN 113418045B
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- 239000000377 silicon dioxide Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 11
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 57
- 239000010959 steel Substances 0.000 claims description 57
- 238000007789 sealing Methods 0.000 claims description 18
- 230000000903 blocking effect Effects 0.000 claims description 15
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- 229910002804 graphite Inorganic materials 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 3
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 description 8
- 238000009413 insulation Methods 0.000 description 5
- 239000012774 insulation material Substances 0.000 description 2
- 229920001342 Bakelite® Polymers 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000004637 bakelite Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- F16K31/0631—Lift valves with movable valve member positioned between seats with ball shaped valve members
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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
- F16K1/14—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 with ball-shaped valve member
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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
- F16K1/32—Details
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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
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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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
- F16K11/056—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 ball-shaped valve members
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
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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
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/168—Flexible insulating material or covers for flanges, junctions, valves or the like
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a high-temperature-resistant electromagnetic valve, and belongs to the technical field of electromagnetic valve structures. The electromagnetic valve comprises a main valve, a pilot valve, an intermediate valve and an electromagnet; the main valve is provided with a high-temperature gas inlet and a high-temperature gas outlet, and an actuating mechanism which bears pressure to close the high-temperature gas inlet is arranged in the main valve; the intermediate valve is installed with the main valve, and an actuating mechanism in the intermediate valve is in contact with an actuating mechanism in the main valve to transmit pressure; the electromagnet and the intermediate valve are respectively arranged on the pilot valve, an air inlet channel and an air outlet channel which are communicated with the atmosphere are arranged between the pilot valve and the intermediate valve, and the electromagnet controls the on-off of the air inlet channel and the air outlet channel; the valve bodies of the pilot valve and the main valve are made of high silica materials, and a high-temperature alloy steel shell is coated with pretightening force outside the valve bodies. The invention can lead the electromagnetic valve to work under high temperature gas for a long time, and avoids the failure of the electromagnetic valve caused by the high temperature gas.
Description
Technical Field
The invention relates to an electromagnetic valve, in particular to an electromagnetic control valve used in a high-temperature and high-pressure gas environment, and belongs to the technical field of electromagnetic valve structures.
Background
The high-temperature electromagnetic valve is generally used in various high-temperature, normal-pressure and high-pressure occasions, is widely applied to automatic control of pipelines such as medium-high-temperature hot water, high-temperature steam, superheated steam, hot air and the like, is used for kiln equipment, drying equipment, petrochemical industry, gas ventilation regulation and electric power mining industry, is applied to the aerospace industry, and is a product matched with automatic control engineering, project transformation and equipment. The existing high-temperature electromagnetic valve selects asbestos, bakelite and the like on heat insulation materials, has low temperature resistance, belongs to filling type heat insulation in a heat insulation mode, still has high heat conductivity coefficient after being connected with other parts, and is easy to cause sealing failure or key parts damage in the valve body once used for a long time or a high frequency, so that the electromagnetic valve fails.
Disclosure of Invention
In view of this, the present invention provides a high temperature resistant solenoid valve, which can operate under high temperature gas for a long time, avoid the failure of the solenoid valve due to high temperature gas, and can be directly connected to various high pressure gas sources or high temperature gas.
A high-temperature resistant electromagnetic valve comprises a main valve, a pilot valve, an intermediate valve and an electromagnet;
the main valve is provided with a high-temperature gas inlet and a high-temperature gas outlet, and an actuating mechanism which bears positive and negative pressure to close and open the high-temperature gas inlet is arranged in the main valve;
The intermediate valve is installed with the main valve, and an actuating mechanism in the intermediate valve is in contact with an actuating mechanism in the main valve to transmit pressure;
the electromagnet and the intermediate valve are respectively arranged on the pilot valve, an air inlet channel and an air outlet channel which are communicated with the atmosphere are arranged between the pilot valve and the intermediate valve, and the electromagnet controls the on-off of the air inlet channel and the air outlet channel;
the pilot valve and the valve body of the main valve are made of high silica materials, and a high-temperature alloy steel shell is coated with pretightening force outside the valve body.
When the electromagnetic valve is in a cut-off state, the electromagnet is not electrified, the air inlet channel between the pilot valve and the intermediate valve is opened, the sum of the forward pressure provided by the air inlet channel and the spring force of the actuating mechanism in the intermediate valve is greater than the reverse pressure of the high-temperature gas inlet of the main valve, and the high-temperature gas inlet of the main valve is closed; when the electromagnetic valve is in an open state, the electromagnet is electrified, the air inlet channel between the pilot valve and the intermediate valve is closed, the exhaust channel is opened, the reverse pressure of the high-temperature gas inlet of the main valve is greater than the sum of the pressure of the exhaust channel to the atmosphere and the spring force of the actuating mechanism in the intermediate valve, the high-temperature gas inlet of the main valve is opened after the main valve moves upwards, and the high-temperature gas is supplied to the outside through the high-temperature gas outlet of the main valve.
Furthermore, the main valve comprises a main valve supporting sleeve, a base, a nozzle, a main valve body, a main valve shell, a middle steel ball, a thrust column and a large steel ball; the middle steel ball, the thrust column and the large steel ball form an actuating mechanism of a main valve, and the large steel ball is made of high-temperature alloy; the processing materials of the medium steel ball and the thrust column adopt high silica;
the main valve supporting sleeve is provided with two threaded connectors and an assembling hole, the two threaded connectors are located below and on the left side of the main valve supporting sleeve, the assembling hole is located above the main valve supporting sleeve, the two threaded connectors are respectively provided with a base and a nozzle, a through hole in the base is a high-temperature gas inlet, a through hole in the nozzle is a high-temperature gas outlet, the large steel ball is located inside the main valve supporting sleeve, and the large steel ball is limited and guided through three guide convex strips distributed along the circumferential direction on the inner wall; the upper part of the main valve body is connected with the intermediate valve by a high silica heat insulator, a main valve shell is sleeved outside the main valve body, a step through hole penetrating through the upper end face and the lower end face is processed on the main valve body, a main valve support sleeve is fixedly connected with the main valve shell through external threads at the upper end, the upper end face of the main valve support sleeve is attached to the lower end face of the main valve body, a thrust column is installed in an assembly hole in the main valve support sleeve, a middle steel ball is installed in a small hole in the step hole of the main valve body, and a large hole is a connecting threaded hole connected with the intermediate valve shell.
Further, the intermediate valve comprises an intermediate valve shell, an upper end cover, a piston, a spring and a top head; the upper end cover is composed of two large and small cylindrical sections, an axial vent hole is formed in the upper end cover, the upper end cover is assembled above the interior of the middle valve shell through the large cylindrical sections, the piston is assembled below the interior of the middle valve shell, grooves are formed in opposite faces of the upper end cover and the piston, two ends of the spring are located in the two grooves respectively, a mounting hole is formed in the bottom face of the piston, a jacking head is fixedly connected in the mounting hole, and the piston, the spring and the jacking head are actuating mechanisms of the middle valve.
Further, the pilot valve comprises a pilot valve housing, a pilot valve body, a blocking seat, a gasket, a ball valve pad, a piston, a spring, a small steel ball and a pipe joint; the pilot valve is characterized in that a mounting hole is formed in the pilot valve body, a gasket, a ball valve pad, a small steel ball, a piston and a blocking seat are sequentially mounted in the mounting hole from inside to outside, the blocking seat is fixed with the pilot valve body through a pilot valve shell, a spring is mounted in the blocking seat, and one end of the spring freely penetrates through a center hole of the piston to be contacted with the small steel ball; the pilot valve body is provided with three through holes communicated with the mounting hole, the first through hole is coaxial with the central axis of the mounting hole, the second through hole is positioned between the piston and the ball valve pad, and the third through hole is positioned between the piston and the blocking seat; the pipe joint is fixedly connected to the pilot valve body through the pilot valve shell, and the pipe joint is communicated with the third through hole.
Furthermore, the electromagnet comprises an electromagnet shell, a fixing cap, a locking nut and an armature; the pilot valve comprises an electromagnet shell, a pilot valve body, a fixing cap, an armature and a washer, wherein the electromagnet shell is fixedly connected with the pilot valve body of the pilot valve, the fixing cap is fixed on the outer circumference of the electromagnet shell through the locking nut, the armature is assembled in a mounting hole of the electromagnet shell, and the front end of the armature extends into a through hole which is coaxial with the central axis of the mounting hole and is arranged on the pilot valve body and contacts with the small steel ball through the washer.
Has the advantages that:
1. the pilot valve, the intermediate valve and the main valve form a multistage ball valve, the heat insulation structural property of the high-temperature pneumatic electromagnetic valve is improved, the valve body is made of high-silica materials for heat insulation, and an alloy steel shell is coated outside the heat insulation material of the valve body to generate pretightening force, so that the high-silica materials can not be damaged and deformed by tensile stress in a high-temperature environment, and the high-silica heat-resistant materials can play excellent heat insulation performance.
2. The inner wall of the main valve support sleeve is provided with three guide convex strips distributed along the circumferential direction for limiting and guiding, and the main valve support sleeve has the performance of main valve ball guiding and large flow passing, so that the electromagnetic valve can meet the requirement of pilot two-stage high-pressure high-temperature large-flow long-time operation, and the problem that the high silica tensile strength is low and the failure is easy to occur under high pressure and high temperature is solved.
3. The thrust column in the main valve is used as a guide part to be in point-to-plane contact with the large steel ball and the middle steel ball, and the middle steel ball is in point-to-plane contact with the top of the middle valve, so that only one axial force is transmitted upwards when the main valve acts, the smooth action of the push block is ensured, the heat conduction effect is reduced by multiple point-to-plane contacts, and the temperature of the sealing ring is ensured to be reduced to meet the requirement.
4. The pipe joint and the thread installation of the blocking seat arranged on the pilot valve are both the main valve shell of the pilot valve bearing the main stress and the high silica bearing the secondary stress, so that the high silica of the pilot valve is prevented from being acted by overlarge force.
5. After the electromagnet is electrified and closed, the pilot valve is opened to release high-temperature gas into the atmosphere, the acting force of the differential piston of the lower middle valve on the valve is reduced by the air pressure in the valve, and the thrust column and the large steel ball are opened upwards by compressing the return spring.
Drawings
FIGS. 1 and 2 are schematic diagrams of the overall structure of the high temperature resistant solenoid valve of the present invention;
FIG. 3 is a schematic view of the main valve support sleeve.
Wherein, 1-main valve support sleeve, 2-main valve body, 3-armature, 4-pilot valve body, 5-pilot valve body, 6-nozzle, 7-intermediate valve body, 8-upper end cover, 9-block seat, 10-electromagnet body, 11-fixing cap, 12-locking nut, 13-piston II, 14-top, 15-thrust column, 16-ball valve pad, 17-gasket, 18-pipe joint, 19-21-rubber sealing ring, 22-23-graphite sealing ring, 24-27-rubber sealing ring, 28-middle steel ball, 29-big steel ball, 30-main valve body, 31-guide convex strip, 32-small steel ball, 33-spring I, 34-piston I, 35-spring II, 36-base, 37-main valve, 38-intermediate valve, 39-pilot valve, 40-electromagnet, 41-actuating mechanism I, 42-actuating mechanism II.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 1 and 2, the present invention provides a high temperature resistant solenoid valve, which comprises a main valve 37, an intermediate valve 38, a pilot valve 39 and an electromagnet 40; an actuator I41 which bears positive and negative pressure to close and open the high-temperature gas inlet is arranged in the main valve 37, the intermediate valve 38 is installed with the main valve 37, and the actuator II 42 in the intermediate valve 38 and the actuator I41 in the main valve 37 transmit pressure through multiple point-surface contact; the electromagnet 40 and the intermediate valve 38 are respectively arranged on the pilot valve 39, an air inlet channel and an air outlet channel which are communicated with the atmosphere are arranged between the pilot valve 39 and the intermediate valve 38, and the electromagnet 40 controls the on-off of the air inlet channel and the air outlet channel.
Wherein, the main valve 37 comprises a main valve supporting sleeve 1, a base 36, a nozzle 6, a main valve body 2, a main valve shell 30, a middle steel ball 28, a thrust column 15 and a large steel ball 29; the intermediate valve 38 comprises an intermediate valve shell 7, a pretightening force connecting piece 8, a piston II 13, a spring II 35 and a top 14; the pilot valve comprises a pilot valve housing 5, a pilot valve body 4, a blocking seat 9, a gasket 17, a ball valve pad 16, a piston 34, a spring I33, a small steel ball 32 and a pipe joint 18; the electromagnet comprises an electromagnet shell 10, a fixed cap 11, a locking nut 12 and an armature 3, wherein rubber sealing rings 19, 20, 21, 24, 25, 26 and 27 are adopted between dynamic sealing components, and graphite sealing rings 22 and 23 are adopted between static sealing components.
In the main valve 37, the main valve support sleeve 1 has two screw interfaces and an assembly hole, the two screw interfaces are located below and on the left side of the main valve support sleeve 1, the assembly hole is located above the main valve support sleeve 1, the two screw interfaces are respectively provided with the base 36 and the nozzle 6, the through hole on the base 36 is a high-temperature gas inlet, the through hole on the nozzle 6 is a high-temperature gas outlet, the large steel ball 29 is located inside the main valve support sleeve 1, the large steel ball 29 is limited and guided by three guide convex strips 31 distributed circumferentially on the inner wall, and the length of the guide convex strip 31 satisfies the guiding stroke, as shown in fig. 3. The outside of a main valve body 2 is sleeved with a main valve shell 30, a step through hole penetrating through the upper end face and the lower end face is processed on the main valve body 2, a main valve support sleeve 1 is fixedly connected with the main valve shell 30 through an external thread at the upper end, the upper end face of the main valve support sleeve 1 is attached to the lower end face of the main valve body 2, a graphite seal ring 23 is installed in a seal groove at the upper end face of the main valve support sleeve 1, a thrust column 15 is installed in an assembly hole on the main valve support sleeve 1, a middle steel ball 28 is installed in a small hole of the step hole of the main valve body 2, a large hole in the step hole is a connection threaded hole connected with an intermediate valve shell 7, and the middle steel ball 28, the thrust column 15 and the large steel ball 29 form an execution mechanism I41 of the main valve; wherein, the material 29 of the large steel ball is made of high-temperature alloy; the materials of the middle steel ball 28 and the thrust column 15 adopt high silica.
In the intermediate valve 38, the upper end cover 8 is composed of a large cylindrical section and a small cylindrical section, an axial vent hole is formed in the upper end cover 8, the upper end cover 8 is assembled above the interior of the intermediate valve housing 7 through threads on the large cylindrical section, a rubber sealing ring 25 is installed in a thread sealing groove of the large cylindrical section, the piston II 13 is assembled inside the intermediate valve housing 7, the piston II 13 is also composed of a large cylindrical section and a small cylindrical section, the rubber sealing rings 20 and 21 are respectively installed in sealing grooves on the outer circumferential surface, grooves are respectively machined on the opposite surfaces of the upper end cover 8 and the piston II 13, two ends of the spring II 35 are respectively located in the two grooves, a mounting hole is machined in the bottom surface of the piston II 13, the top head 14 is fixedly connected in the mounting hole, and the piston II 13, the spring II 35 and the top head 14 are an actuating mechanism II 42 of the intermediate valve 38. The outer circle section of the intermediate valve shell 7 is processed with threads, the intermediate valve is fixedly connected with the step hole of the main valve body 2 through the external threads of the intermediate valve shell 7 in a threaded manner, and the end face of the intermediate valve shell 7, which is in contact with the main valve body 2, is provided with a graphite sealing ring 25.
In the pilot valve 39, the interior of the pilot valve body 4 is provided with a mounting hole, a gasket 17, a ball valve pad 16, a small steel ball 32, a spring I33, a piston I34 and a plug seat 9 are sequentially mounted in the mounting hole from inside to outside, and rubber sealing rings 19 are mounted on the gasket 17 and the piston I34. The blocking seat 9 is fixed with the pilot valve body 4 through the pilot valve shell 5 and closes the mounting hole, and a rubber sealing ring 27 is arranged on the outer circular surface matched with the pilot valve body 4 of the blocking seat 9. A spring I33 is arranged in the blocking seat 9, and one end of the spring I33 freely penetrates through a center hole of a piston I34 to be in contact with a small steel ball 32; as shown in fig. 1, the pilot valve body 4 is provided with three through holes which are respectively communicated with the mounting hole, the first through hole is coaxial with the central axis of the mounting hole, the second through hole is positioned between the piston and the ball valve pad 16, and the third through hole is positioned between the piston and the plug seat 9; the pipe joint 18 is fixedly connected to the pilot valve body 4 through the pilot valve housing 5, the pipe joint 18 is communicated with a third through hole, namely an air inlet channel, and an air outlet channel is further communicated with the mounting hole on the pilot valve body. The intermediate valve is connected with the pilot valve through the small cylindrical section of the upper end cover 8, and the vent hole in the upper end cover 8 is communicated with the second through hole in the pilot valve body 4.
In the electromagnet 40, an electromagnet housing 10 is fixedly connected with a pilot valve body 4 of a pilot valve, a fixing cap 11 is fixed on the outer circumferential surface of the electromagnet housing 10 through a locking nut 12, an armature 3 is assembled in a mounting hole of the electromagnet housing 10, and the front end of the armature 3 extends into a through hole coaxial with the central axis of the mounting hole on the pilot valve body 4 and passes through a gasket 17 to contact with a small steel ball 32.
The working principle is as follows: when the electromagnetic valve is in an initial state, the electromagnet is not electrified, the small steel ball 32 in the pilot valve is always in the left end position under the action of the spring force, the air passage connected with the pipe joint 18 enters the intermediate valve 38 after passing through the central hole of the piston, namely, the air inlet channel between the pilot valve 39 and the intermediate valve 38 is in an open state, after the air pressure enters the intermediate valve 38, the piston II 13 of the intermediate valve 38 moves downwards to directly push the top 14, the middle steel ball 28 and the thrust column 15 to press the large steel ball 29 downwards, the large steel ball 29 closes the high-temperature air inlet on the base 36, and at the moment, the main valve 37 is closed. On the contrary, when the electromagnetic valve is in the working state, the electromagnet 40 is energized, the armature 3 moves rightwards and pushes the small steel ball 32 and the piston I34 to compress the spring I33, the piston I34 closes the air inlet channel, the air outlet channel is in the opening state, the air in the intermediate valve 38 is released to the atmosphere through the air outlet channel, the pressure of the upper cavity of the intermediate valve 38 is reduced, when the reverse pressure of the high-temperature gas inlet of the main valve 37 is greater than the sum of the pressure of the air outlet channel to the atmosphere and the spring force in the intermediate valve 38, the large steel ball 29 is pushed by the high-temperature pressure gas to move upwards, then the high-temperature gas inlet of the main valve 37 is opened, and the high-temperature gas is supplied to the outside in the fully opened large flow state through the guide convex strip 31.
In order to prevent the temperature at the electromagnet 40 and the pilot valve 39 from being too high, the main valve 37 and the intermediate valve 38 are insulated with high silica filler material, so that the high temperature at the main valve body 2 is prevented from being rapidly transmitted to the electromagnet 40 and the pilot valve 39. The higher gas valve nozzle department of during operation temperature, the temperature is about 927 ℃, after thermal-insulated and other parts of switching through high silica material, can connect other thermolabile spare part, guarantees normal work such as rubber seal and enameled wire.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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 (4)
1. A high-temperature resistant electromagnetic valve is characterized by comprising a main valve (37), an intermediate valve (38), a pilot valve (39) and an electromagnet (40);
the intermediate valve (38) comprises an intermediate valve shell (7), an upper end cover (8), a piston II (13), a spring II (35) and a top head (14); the upper end cover (8) is composed of a large cylindrical section and a small cylindrical section, an axial vent hole is formed in the upper end cover, the upper end cover (8) is assembled above the interior of the middle valve shell (7) through the large cylindrical section, the piston II (13) is assembled in the middle valve shell (7), grooves are formed in the opposite surfaces of the upper end cover (8) and the piston II (13), two ends of the spring II (35) are located in the two grooves respectively, a mounting hole is formed in the bottom surface of the piston II (13), and a top head (14) is fixedly connected in the mounting hole; the piston II (13), the spring II (35) and the top head (14) are an actuating mechanism II (42) of the intermediate valve;
The pilot valve (39) comprises a pilot valve shell (5), a pilot valve body (4), a blocking seat (9), a gasket (17), a ball valve pad (16), a piston I (34), a spring I (33), a small steel ball (32) and a pipe joint (18); the pilot valve is characterized in that a mounting hole is formed in the pilot valve body (4), a gasket (17), a ball valve pad (16), a small steel ball (32), a piston I (34) and a blocking seat (9) are sequentially mounted in the mounting hole from inside to outside, the blocking seat (9) is fixed with the pilot valve body (4) through a pilot valve shell (5), a spring I (33) is mounted in the blocking seat (9), and one end of the spring I (33) freely penetrates through a center hole of the piston I (34) to be in contact with the small steel ball (32); the pilot valve body (4) is provided with three through holes communicated with the mounting hole, the first through hole is coaxial with the central axis of the mounting hole, the second through hole is positioned between the piston I (34) and the ball valve pad (16), and the third through hole is positioned between the piston I (34) and the blocking seat (9); the pipe joint (18) is fixedly connected to the pilot valve body (4) through the pilot valve shell (5), and the pipe joint (18) is communicated with the third through hole;
the main valve (37) is provided with a high-temperature gas inlet and a high-temperature gas outlet, and an actuating mechanism I (41) which bears positive and negative pressure to close and open the high-temperature gas inlet is arranged in the main valve (37);
The intermediate valve (38) is installed with a main valve (37), and an actuating mechanism II (42) in the intermediate valve (38) is in contact with an actuating mechanism I (41) in the main valve (37) to transmit pressure;
the electromagnet (40) and the intermediate valve (38) are respectively arranged on a pilot valve (39), an air inlet channel and an air outlet channel communicated with the atmosphere are arranged between the pilot valve (39) and the intermediate valve (38), and the electromagnet (40) controls the on-off of the air inlet channel and the air outlet channel;
when the electromagnetic valve is in an initial state, the electromagnet is not electrified, the small steel ball (32) in the pilot valve is always positioned at the left end position under the action of spring force, a gas path connected with the pipe joint (18) enters the intermediate valve (38) after passing through a central hole of the piston, namely, a gas inlet channel between the pilot valve (39) and the intermediate valve (38) is in an open state, after gas pressure enters the intermediate valve (38), the piston II (13) of the intermediate valve (38) moves downwards to directly push the top head (14), the middle steel ball (28) and the thrust column (15) to press the large steel ball (29) downwards, the large steel ball (29) closes a high-temperature gas inlet on the base (36), and at the moment, the main valve (37) is closed; on the contrary, when the electromagnetic valve is in a working state, the electromagnet (40) is electrified, the armature iron (3) moves rightwards and pushes the small steel ball (32) and the piston I (34) to compress the spring I (33), the piston I (34) seals the air inlet channel, and the air outlet channel is in an open state;
The valve bodies of the pilot valve (39) and the main valve (37) are made of high silica materials, and a high-temperature alloy steel shell is coated with pretightening force outside the valve bodies.
2. The high temperature resistant solenoid valve of claim 1, wherein the main valve (37) comprises a main valve support sleeve (1), a base (36), a nozzle (6), a main valve body (2), a main valve housing (30), a middle steel ball (28), a thrust column (15), and a large steel ball (29);
the main valve support sleeve (1) is provided with two threaded interfaces and an assembling hole, the two threaded interfaces are positioned below and on the left side of the main valve support sleeve (1), the assembling hole is positioned above the main valve support sleeve (1), the two threaded interfaces are respectively provided with a base (36) and a nozzle (6), a through hole in the base (36) is a high-temperature gas inlet, a through hole in the nozzle (6) is a high-temperature gas outlet, a large steel ball (29) is positioned in the main valve support sleeve (1), the large steel ball (29) is limited and guided through three guide convex strips (31) which are circumferentially distributed on the inner wall, and the length of each guide convex strip (31) meets the guiding stroke; the outer portion of a main valve body (2) is sleeved with a main valve shell (30), a step through hole penetrating through the upper end face and the lower end face is processed on the main valve body (2), a main valve support sleeve (1) is fixedly connected with the main valve shell (30) through an external thread at the upper end, the upper end face of the main valve support sleeve (1) is attached to the lower end face of the main valve body (2), a graphite sealing ring (23) is installed in a sealing groove in the upper end face of the main valve support sleeve (1), a thrust column (15) is installed in an assembly hole in the main valve support sleeve (1), a middle steel ball (28) is installed in a small hole in the step hole of the main valve body (2), and a large hole in the step hole is a connection threaded hole connected with a middle valve shell (7).
3. The high-temperature-resistant electromagnetic valve according to claim 2, characterized in that the medium steel ball (28), the thrust column (15) and the large steel ball (29) form an actuator I (41) of the main valve (37), and the large steel ball (29) is made of high-temperature alloy; the processing materials of the medium steel ball (28) and the thrust column (15) adopt high silica.
4. The high-temperature-resistant solenoid valve according to claim 1, 2 or 3, characterized in that the electromagnet (40) comprises an electromagnet housing (10), a retaining cap (11), a lock nut (12) and an armature (3); the electromagnetic valve is characterized in that the electromagnet housing (10) is fixedly connected with a pilot valve body (4) of a pilot valve (39), a fixing cap (11) is fixed on the outer circumferential surface of the electromagnet housing (10) through a locking nut (12), an armature (3) is assembled in a mounting hole of the electromagnet housing (10), and the front end of the armature (3) extends into a through hole coaxial with the central axis of the mounting hole in the pilot valve body (4) and passes through a gasket (17) to be in contact with a small steel ball (32).
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| CN202110633802.6A CN113418045B (en) | 2021-06-07 | 2021-06-07 | High-temperature-resistant electromagnetic valve |
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| CN202110633802.6A CN113418045B (en) | 2021-06-07 | 2021-06-07 | High-temperature-resistant electromagnetic valve |
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| GB865419A (en) * | 1956-05-16 | 1961-04-19 | Rotol Ltd | Improvements in or relating to hydraulic safety valves |
| CN102996861A (en) * | 2012-12-05 | 2013-03-27 | 蚌埠方正气体净化设备有限公司 | Electromagnetic pilot-operated type high pressure double-channel control valve |
| CN204459339U (en) * | 2015-02-04 | 2015-07-08 | 重庆川庆科技发展有限公司 | High liquid level (HLL) Emergeny Cutoff Valves |
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| DK106271C (en) * | 1961-04-08 | 1967-01-16 | Kromschroeder Ag G | Thermoelectrically controlled semi-automatic safety valve for two or more burner sites. |
| CN102506208A (en) * | 2011-12-19 | 2012-06-20 | 铜陵市三圆特种铸造有限责任公司 | Gas electromagnetic valve |
| CN202914757U (en) * | 2012-10-08 | 2013-05-01 | 郑州郑航机电设备有限公司 | Anti-explosion pilot-operated type solenoid valve |
| CN106382268B (en) * | 2016-09-08 | 2017-11-28 | 华中科技大学 | External control guiding high pressure air-powered electromagnetic switch valve |
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|---|---|---|---|---|
| GB865419A (en) * | 1956-05-16 | 1961-04-19 | Rotol Ltd | Improvements in or relating to hydraulic safety valves |
| CN102996861A (en) * | 2012-12-05 | 2013-03-27 | 蚌埠方正气体净化设备有限公司 | Electromagnetic pilot-operated type high pressure double-channel control valve |
| CN204459339U (en) * | 2015-02-04 | 2015-07-08 | 重庆川庆科技发展有限公司 | High liquid level (HLL) Emergeny Cutoff Valves |
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