CN114321974B - Flame-proof type ignition gun suitable for high-pressure environment - Google Patents
Flame-proof type ignition gun suitable for high-pressure environment Download PDFInfo
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- CN114321974B CN114321974B CN202111445648.6A CN202111445648A CN114321974B CN 114321974 B CN114321974 B CN 114321974B CN 202111445648 A CN202111445648 A CN 202111445648A CN 114321974 B CN114321974 B CN 114321974B
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Abstract
The invention discloses an explosion-proof igniting gun suitable for a high-pressure environment, which comprises: an electrical lead-in device, a seal assembly and an ignition gun body; the sealing component is arranged between the electric introducing device and the ignition gun body, and the ignition gun body is hermetically arranged on the space furnace; according to the invention, explosion suppression is realized through the electric introduction device; the sealing component can withstand 10MPa high pressure, so that the leakage of high-pressure gas in the furnace is prevented, and the high-pressure-resistant reliable sealing is realized.
Description
Technical Field
The invention belongs to the technical field of ignition guns, and particularly relates to an explosion-proof ignition gun suitable for a high-pressure environment.
Background
With the rapid development of the coal chemical industry, the space furnace is widely popularized and used. The ignition gun is used as a key device of the combustion chamber and is responsible for igniting coal powder during starting, and is a precondition for carrying out subsequent work. Because the space furnace is a pressurized furnace, the pressure in the space furnace is up to several megapascals, the sealing performance requirement is extremely high, and any equipment arranged on the space furnace cannot cause furnace pressure leakage, so that the extremely high requirement is put on the sealing performance of the ignition gun. At present, the igniting gun mostly adopts an extrusion type sealing structure made of elastic materials such as tetrafluoro and the like, so that the problem is solved in a short time, after long-time high-temperature high-pressure severe working condition operation, the sealing material is shaped and aged, the sealing effect is reduced, the leakage event is caused, the normal production is influenced, and even the safety accident is caused. In addition, because of the inflammable and explosive dangerous environment of the coal chemical industry, the existing ignition gun of the space furnace needs to be modified so as to meet the requirement of explosion-proof performance.
Disclosure of Invention
In view of the above, the invention provides the flame-proof type ignition gun suitable for the high-pressure environment, which has good sealing property, can be used for a long time under the pressure environment of up to 10MPa, solves the leakage problem of the current space furnace ignition gun after long-term use, meets the flame-proof requirement, and can safely work under the flammable and explosive environment of coal chemical industry.
The invention is realized by the following technical scheme:
an explosion-proof ignition gun suitable for a high pressure environment, comprising: an electrical lead-in device, a seal assembly and an ignition gun body;
the ignition gun body is hermetically installed on the space furnace; the sealing component is arranged between the electric introducing device and the ignition gun body and is in sealing welding with the ignition gun body; the electric introduction device is used for electric introduction and explosion suppression of the ignition gun; the ignition gun body is used for igniting high-pressure gas in the space furnace;
wherein, the seal assembly includes: the device comprises a transition joint, a spacer bush I and an electric penetrating piece; the isolation sleeve I is coaxially arranged in the transition joint, the electric penetrating piece is a tightly combined whole, one end of the electric penetrating piece is coaxially arranged in the isolation sleeve I, the middle part of the electric penetrating piece is coaxially arranged in the transition joint and is welded with the transition joint in a sealing way, and the other end of the electric penetrating piece extends out of the transition joint.
Further, the electrical introducing device includes: the cable, the explosion-proof joint, the aviation plug and the explosion-proof shell;
one end of the explosion-proof shell is open, and the other end is closed; and one end of the explosion-proof joint is connected with the rear fire-stopping device through a cable, the other end of the explosion-proof joint is arranged on the closed end of the explosion-proof shell, and the aerial plug is arranged inside the explosion-proof shell and is connected with the cable through the explosion-proof joint.
Further, the ignition gun body includes: the insulating sleeve II, the mounting flange, the outer electrode, the insulating ceramic and the central electrode;
the ignition gun body is hermetically arranged on the space furnace through the mounting flange;
the inside of the mounting flange is provided with a step through hole, the isolation sleeve II is a step shaft provided with a center through hole, and the isolation sleeve II is arranged in the step through hole of the mounting flange;
the central electrode, the isolation ceramic and the outer electrode are coaxially nested from inside to outside; one end of the central electrode is positioned in the mounting flange and is matched with a hole shaft of the isolation sleeve II, and the isolation sleeve II is positioned between the mounting flange and the central electrode; one end of the isolating ceramic is in butt joint with the end face of the isolating sleeve II; one end of the outer electrode is in butt joint with the end face of the small hole of the step through hole of the mounting flange.
Further, one end of the transition joint is connected with the air-plug thread, an external thread is processed on the outer circumferential surface of the middle part of the transition joint, an internal thread is processed at the opening end of the explosion-proof shell, and the transition joint is connected with the explosion-proof shell through threads; the other end of the transition joint is provided with an annular installation boss, one end face of the annular installation boss is abutted against the end face of the explosion-proof shell, an O-shaped sealing ring is installed between the two abutted end faces, and the end face of the other end of the annular installation boss is welded with the end face of the large hole of the step through hole of the installation flange in a sealing mode.
Further, the electrical penetration includes: an upper lotus socket, a penetrating piece inner electrode, a penetrating piece outer electrode, a ceramic isolation layer and a lower lotus socket; the inner electrode of the penetrating piece, the ceramic isolation layer and the outer electrode of the penetrating piece are coaxially nested and installed from inside to outside; the outer circumferential surface of the outer electrode of the penetrating piece is in contact with the inner circumferential surface of the transition joint and is welded with the transition joint in a sealing way; one end of the outer electrode of the penetrating piece is coaxially butted with the end face of the isolation sleeve I, and the other end of the outer electrode of the penetrating piece is coaxially butted with the end face of the isolation sleeve II.
Further, the upper lotus socket and the lower lotus socket are lotus sockets, one end of each lotus socket is provided with a cylindrical boss plug, the other end of each lotus socket is provided with a thin-wall blind hole, four slits are uniformly formed in the thin wall of the outer circumference of each thin-wall blind hole, and the thin-wall blind holes are matched with the cylindrical boss plugs;
the upper lotus socket and the lower lotus socket are respectively and fixedly connected to two ends of the inner electrode of the penetrating piece, the aviation plug and the central electrode are respectively provided with a cylindrical boss plug, the upper lotus socket is matched with the cylindrical boss plug in the aviation plug, and the lower lotus socket is matched with the cylindrical boss plug of the central electrode of the ignition gun.
Further, the isolation sleeve II is made of a tetrafluoro material; the mounting flange, the central electrode, the outer electrode, the inner electrode of the penetrating piece and the outer electrode of the penetrating piece are all made of stainless steel materials.
Further, the external electrode is welded on the mounting flange;
the upper lotus socket and the lower lotus socket are respectively welded at two ends of the inner electrode of the penetrating piece.
Further, the ceramic isolation layer, the inner electrode of the penetrating piece and the outer electrode of the penetrating piece are tightly combined together through a sintering process.
Further, the ignition gun body is arranged on the space furnace and is sealed through a winding pad.
The beneficial effects are that: (1) The sealing assembly is arranged to realize the sealing of the ignition gun in a high-pressure environment, specifically, the ignition gun body is arranged on a space furnace through the mounting flange and is sealed through sealing means such as a winding pad and the like; the high-pressure gas in the furnace can only rise to the sealing assembly through the gap between the outer electrode of the ignition gun and the isolation ceramic and the gap between the isolation ceramic and the central electrode, the electric penetrating piece in the sealing assembly can bear 10MPa high pressure, the outer electrode of the penetrating piece is in sealing welding with the transition joint, the transition joint is in sealing welding with the mounting flange, and the welding strength can bear 10MPa high pressure, so that the sealing assembly can bear 10MPa high pressure, the leakage of the high-pressure gas in the furnace is prevented, and the reliable sealing of the high pressure resistance is realized.
(2) According to the invention, the explosion suppression is realized through the electric introduction device, the electric introduction device is provided with the explosion suppression shell, the cable is introduced into the explosion suppression shell through the explosion suppression joint, the explosion suppression shell is connected with the sealing component through threads, and the threads meet the explosion suppression requirement, so that the explosion suppression of the ignition gun is realized through the explosion suppression design of the electric introduction device.
(3) According to the invention, the electric introducing device is connected with the sealing assembly through threads, and the ignition gun is connected with the space furnace through the flange, so that the ignition gun is convenient to detach and overhaul.
Drawings
FIG. 1 is an overall schematic diagram of an explosion-proof ignition gun;
FIG. 2 is a split schematic of FIG. 1;
FIG. 3 is a schematic view of an electrical lead-in device;
FIG. 4 is a schematic view of the body of the ignition gun;
FIG. 5 is a schematic view of a seal assembly
FIG. 6 is a schematic view of an electrical penetration;
FIG. 7 is a schematic diagram of a lotus socket;
the device comprises a 1-electric introducing device, a 2-sealing component, a 3-ignition gun body, a 11-cable, a 12-explosion-proof connector, a 13-aviation plug, a 14-explosion-proof shell, a 21-transition connector, a 22-isolation sleeve I, a 23-electric penetrating piece, a 24-O-shaped sealing ring, a 31-isolation sleeve II, a 32-mounting flange, a 33-external electrode, a 34-isolation ceramic, a 35-central electrode, a 231-upper lotus socket, a 232-penetrating piece internal electrode, a 233-penetrating piece external electrode, a 234-ceramic isolation layer and a 235-lower lotus socket.
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
The embodiment provides an explosion-proof igniting gun suitable for a high-pressure environment, referring to fig. 1 and fig. 2, including: an electric lead-in device 1, a sealing assembly 2 and an ignition gun body 3; the sealing component 2 is arranged between the electric introduction device 1 and the ignition gun body 3, and the ignition gun body 3 is arranged on the space furnace in a sealing way;
referring to fig. 1 to 3, the electrical lead-in device 1 comprises: a cable 11, an explosion-proof joint 12, an aerial plug 13 and an explosion-proof shell 14; one end of the explosion-proof shell 14 is closed, the other end of the explosion-proof shell is open, and an internal thread is processed at the open end of the explosion-proof shell 14 and is used for being connected with the sealing assembly 2; one end of the flameproof joint 12 is connected with the rear fire-stopping device through a cable 11, the other end of the flameproof joint is arranged on the closed end of the flameproof shell 14, the aviation plug 13 is arranged inside the flameproof shell 14, the flameproof joint 12 is connected with the cable 11, and the aviation plug 13 is provided with internal threads;
referring to fig. 1, 2 and 4, the ignition gun body 3 includes: the isolating sleeve II 31, the mounting flange 32, the outer electrode 33, the isolating ceramic 34 and the central electrode 35; the ignition gun body 3 is arranged on the space furnace through a mounting flange 32 and is sealed through a sealing means such as a winding gasket; a step through hole is formed in the mounting flange 32, the isolation sleeve II 31 is a step shaft with a center through hole, and the isolation sleeve II 31 is arranged in the step through hole of the mounting flange 32; the center electrode 35, the isolation ceramic 34 and the outer electrode 33 are coaxially nested from inside to outside, and the isolation ceramic 34 is positioned between the center electrode 35 and the outer electrode 33, so that the electrical isolation of the center electrode 35 and the outer electrode 33 is realized; one end of the external electrode 33 is butted with the end face where the small hole of the step through hole of the mounting flange 32 is located; one end of the isolating ceramic 34 is in butt joint with the end face of the isolating sleeve II 31; one end of the central electrode 35 is positioned in the mounting flange 32 and is matched with the central through hole shaft of the isolation sleeve II 31, and the isolation sleeve II 31 can realize electrical isolation of the central electrode 35 and the mounting flange 32;
referring to fig. 1, 2 and 5, the seal assembly 2 includes: a transition joint 21, a spacer I22 and an electrical penetration 23; the isolating sleeve I22 is coaxially arranged in the transition joint 21, one end of the electric penetrating piece 23 is coaxially arranged in the isolating sleeve I22, the middle part of the electric penetrating piece is coaxially arranged in the transition joint 21 and is welded with the transition joint 21 in a sealing way, and the other end of the electric penetrating piece extends out of the transition joint 21; an external thread is processed at one end of the transition joint 21 and is in threaded connection with the aviation plug 13, an annular installation boss is arranged at the other end of the transition joint 21, and one end face of the annular installation boss is welded with the end face of the large hole of the step through hole of the installation flange 32 in a sealing manner; the outer circumferential surface of the middle part of the transition joint 21 is provided with external threads for being in threaded connection with the explosion-proof shell 14, so that the connection between the electric lead-in device 1 and the sealing assembly 2 is realized, and the internal threads of the explosion-proof shell 14 and the external threads of the transition joint 21 meet explosion-proof requirements; the end face of the flameproof shell 14 is abutted against the end face of the other end of the annular installation boss of the transition joint 21, and an O-shaped sealing ring 24 is installed between the two abutted end faces, so that the sealing of the electric lead-in device 1 is realized;
referring to fig. 1, 2 and 6, the electrical penetration 23 includes: an upper lotus socket 231, a penetration inner electrode 232, a penetration outer electrode 233, a ceramic isolation layer 234, and a lower lotus socket 235; the inner electrode 232 of the penetrating piece, the ceramic isolation layer 234 and the outer electrode 233 of the penetrating piece are coaxially nested from inside to outside, the ceramic isolation layer 234 is positioned between the inner electrode 232 of the penetrating piece and the outer electrode 233 of the penetrating piece, and the inner electrode 232, the ceramic isolation layer 234 and the outer electrode 233 of the penetrating piece are tightly combined together through a sintering process and can withstand high pressure of 10MPa, so that the functions of sealing, pressure resistance and mutual insulation are achieved; the outer circumferential surface of the outer electrode 233 of the penetrating member is in contact with the transition joint 21 and is in sealing welding with the transition joint 21, one end of the outer electrode 233 of the penetrating member is in coaxial butt joint with the end surface of the isolation sleeve I22, and the other end of the outer electrode 233 of the penetrating member is in coaxial butt joint with the end surface of the isolation sleeve II 31;
referring to fig. 7, the upper lotus socket 231 and the lower lotus socket 235 are lotus sockets, one end of each lotus socket is a cylindrical boss plug, a thin-wall blind hole is formed in the other end of each lotus socket, and four slits are uniformly formed in the thin wall of the outer circumference of each thin-wall blind hole, so that the lotus sockets are matched with the cylindrical boss plugs with corresponding sizes; the upper lotus socket 231 and the lower lotus socket 235 are respectively fixedly connected to two ends of the inner electrode 232 of the penetrating member; the aviation plug 13 and the central electrode 35 are respectively provided with a cylindrical boss plug, the upper lotus socket 231 is matched with the cylindrical boss plug in the aviation plug 13, and the lower lotus socket 235 is matched with the cylindrical boss plug of the central electrode 35 of the ignition gun, so that the aviation plug 13, the inner electrode 232 of the penetrating piece and the central electrode 35 of the ignition gun are electrically connected;
the outer electrode 233 of the penetrating member is made of stainless steel, can be tightly combined with the ceramic isolation layer 234 through a sintering process on one hand, and can be connected with the transition joint 21 through welding on the other hand, so that sealing is realized;
wherein the isolation sleeve II 31 is made of a tetrafluoro material; the inner electrode 232, the mounting flange 32, the central electrode 35 and the outer electrode 33 of the penetrating piece are all made of stainless steel materials;
the outer electrode 33 is welded on the mounting flange 32; the upper lotus socket 231 and the lower lotus socket 235 are respectively welded at two ends of the inner electrode 232 of the penetrating member; the outer electrode 233 of the penetrating member is welded on the transition joint 21, specifically, the end face of the junction between the transition joint 21 and the hole axis of the outer electrode 233 of the penetrating member is welded;
working principle: (1) ignition principle of ignition gun: the aviation plug 13 is electrically connected with the rear ignition device, and the central electrode 35, the lower lotus socket 235, the inner electrode 232 of the electric penetration piece, the upper lotus socket 231 and one pole of the aviation plug 13 are electrically connected to form an inner electrode assembly; the outer electrode 33, the mounting flange 32, the transition joint 21, the outer electrode 233 of the penetrating piece and the other electrode of the aviation plug 13 of the ignition gun are electrically connected to form an outer electrode assembly; the inner electrode assembly and the outer electrode assembly penetrate from the atmospheric environment outside the space furnace to the internal high-pressure environment; the isolating ceramic 34, the isolating sleeve II 31 and the isolating sleeve I22 realize the electrical isolation of the inner electrode assembly and the outer electrode assembly; the rear ignition device applies an instantaneous high voltage to the ignition gun, and the center electrode 35 and the outer electrode 33 of the ignition gun strike and discharge air at the front end thereof, thereby generating an electric spark, and thus, successfully igniting.
(2) High-pressure-resistant sealing principle of ignition gun: the ignition gun body 3 is arranged on the space furnace through a mounting flange 32 and is sealed through a sealing means such as a winding gasket; the high-pressure gas in the furnace can only rise to the sealing component 2 through the gap between the ignition gun outer electrode 33 and the isolation ceramic 34 and the gap between the isolation ceramic 34 and the central electrode 35, the electric penetrating piece 23 in the sealing component 2 is a whole tightly combined through a sintering process, the high pressure of 10MPa can be tolerated, the penetrating piece outer electrode 233 and the transition joint 21 are hermetically welded, the transition joint 21 and the mounting flange 32 are hermetically welded, the welding strength can tolerate the high pressure of 10MPa, so the sealing component 2 can tolerate the high pressure of 10MPa, the leakage of the high-pressure gas in the furnace is prevented, and the reliable sealing of the high pressure is realized.
(3) Flame-proof principle of igniting gun: the electrical introducing device 1 is provided with an explosion-proof shell 14, the cable 11 is introduced into the explosion-proof shell 14 through the explosion-proof joint 12, the explosion-proof shell 14 is in threaded connection with the sealing assembly 2 to meet explosion-proof requirements, and explosion-proof of the ignition gun is realized through the explosion-proof design of the electrical introducing device 1.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An explosion-proof type ignition gun suitable for high-pressure environment, which is characterized by comprising: an electric introduction device (1), a sealing assembly (2) and an ignition gun body (3);
the ignition gun body (3) is hermetically arranged on the space furnace; the sealing component (2) is arranged between the electric introduction device (1) and the ignition gun body (3), and the sealing component (2) is in sealing welding with the ignition gun body (3); the electric introduction device (1) is used for electric introduction and explosion suppression of the ignition gun; the ignition gun body (3) is used for igniting high-pressure gas in the space furnace;
wherein the sealing assembly (2) comprises: a transition joint (21), a spacer bush I (22) and an electrical penetration piece (23); the isolating sleeve I22 is coaxially arranged in the transition joint (21), the electric penetrating piece (23) is a tightly combined whole, one end of the electric penetrating piece (23) is coaxially arranged in the isolating sleeve I (22), the middle part of the electric penetrating piece is coaxially arranged in the transition joint (21) and is in sealing welding with the transition joint (21), and the other end of the electric penetrating piece extends out of the transition joint (21);
the transition joint (21) is welded with the ignition gun body (3) in a sealing way;
the electrical penetration includes: the inner electrode (232), the outer electrode (233) and the ceramic isolation layer (234) of the penetrating piece are coaxially nested from inside to outside; the outer circumferential surface of the penetrating piece outer electrode (233) is in contact with the inner circumferential surface of the transition joint (21) and is in sealing welding with the transition joint (21);
the ceramic isolation layer (234), the penetration piece inner electrode (232) and the penetration piece outer electrode (233) are tightly combined together through a sintering process.
2. An explosion-proof ignition gun suitable for high-pressure environments according to claim 1, characterized in that said electrical lead-in device (1) comprises: the cable (11), the explosion-proof joint (12), the aviation plug (13) and the explosion-proof shell (14);
one end of the explosion-proof shell (14) is open, and the other end is closed; one end of the explosion-proof joint (12) is connected with the rear fire-stopping device through a cable (11), the other end of the explosion-proof joint is arranged on the closed end of the explosion-proof shell (14), and the aerial plug (13) is arranged inside the explosion-proof shell (14) and is connected with the cable (11) through the explosion-proof joint (12).
3. A flame-proof type ignition gun suitable for high-pressure environments as claimed in claim 2, wherein said ignition gun body (3) comprises: the insulating sleeve II (31), the mounting flange (32), the outer electrode (33), the insulating ceramic (34) and the central electrode (35);
the ignition gun body (3) is hermetically arranged on the space furnace through a mounting flange (32);
the inside of the mounting flange (32) is provided with a step through hole, the isolation sleeve II (31) is a step shaft provided with a center through hole, and the isolation sleeve II (31) is arranged in the step through hole of the mounting flange (32);
the central electrode (35), the isolating ceramic (34) and the outer electrode (33) are coaxially nested from inside to outside; one end of the center electrode (35) is positioned in the mounting flange (32) and is matched with the hole shaft of the isolation sleeve II (31), and the isolation sleeve II (31) is positioned between the mounting flange (32) and the center electrode (35); one end of the isolating ceramic (34) is in butt joint with the end face of the isolating sleeve II (31); one end of the outer electrode (33) is in butt joint with the end face of the small hole of the step through hole of the mounting flange (32).
4. A flame-proof type ignition gun suitable for high-pressure environment as claimed in claim 3, wherein one end of the transition joint (21) is in threaded connection with the aerial plug (13), an external thread is processed on the outer circumferential surface of the middle part of the transition joint (21), an internal thread is processed on the opening end of the flame-proof shell (14), and the transition joint (21) is in threaded connection with the flame-proof shell (14); the other end of the transition joint (21) is provided with an annular installation boss, one end face of the annular installation boss is in contact with the end face of the explosion-proof shell (14), an O-shaped sealing ring (24) is installed between the two opposite end faces, and the end face of the other end of the annular installation boss is in sealing welding with the end face of the step through hole of the installation flange (32) where the large hole is located.
5. A flame-proof type ignition gun adapted for high pressure environment as claimed in claim 3, wherein one end of said penetrating member external electrode (233) is coaxially butted with the end face of the spacer bush i (22), and the other end is coaxially butted with the end face of the spacer bush ii (31).
6. The flame-proof type ignition gun suitable for high-pressure environment according to claim 5, wherein the electrical penetration further comprises: an upper lotus socket (231) and a lower lotus socket (235); the upper lotus socket (231) and the lower lotus socket (235) are lotus sockets, one end of each lotus socket is provided with a cylindrical boss plug, the other end of each lotus socket is provided with a thin-wall blind hole, four slits are uniformly formed in the thin wall of the outer circumference of each thin-wall blind hole, and the thin-wall blind holes are matched with the cylindrical boss plugs;
the upper lotus socket (231) and the lower lotus socket (235) are respectively and fixedly connected to two ends of an inner electrode (232) of the penetrating piece, cylindrical boss plugs are arranged on the aviation plug (13) and the central electrode (35), the upper lotus socket (231) is matched with the cylindrical boss plugs in the aviation plug (13), and the lower lotus socket (235) is matched with the cylindrical boss plugs of the central electrode (35) of the ignition gun.
7. A flame-proof type ignition gun suitable for high pressure environment as claimed in any one of claims 3-6, wherein said spacer ii (31) is a tetrafluoro material; the mounting flange (32), the central electrode (35), the outer electrode (33), the penetrating piece inner electrode (232) and the penetrating piece outer electrode (233) are all made of stainless steel materials.
8. A flame-proof type ignition gun adapted for use in a high pressure environment as claimed in claim 5 or 6, wherein said outer electrode (33) is welded to a mounting flange (32);
the upper lotus socket (231) and the lower lotus socket (235) are respectively welded at two ends of the inner electrode (232) of the penetrating piece.
9. An explosion-proof ignition gun suitable for high-pressure environment according to claim 7, characterized in that the ignition gun body (3) is mounted on an aerospace furnace and is sealed by a winding gasket.
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CN114321974B true CN114321974B (en) | 2023-06-27 |
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