CN211410783U - Automatic exhaust type fire damper for positive pressure cabinet - Google Patents
Automatic exhaust type fire damper for positive pressure cabinet Download PDFInfo
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- CN211410783U CN211410783U CN201922170268.0U CN201922170268U CN211410783U CN 211410783 U CN211410783 U CN 211410783U CN 201922170268 U CN201922170268 U CN 201922170268U CN 211410783 U CN211410783 U CN 211410783U
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Abstract
The utility model provides an malleation is automatic exhaust type fire damper for cabinet, including the quarter bend that one end and malleation cabinet are connected, at the other port of quarter bend internal embedded cone type body, the inner chamber of cone type body be the back taper and communicate with the quarter bend, place a gravity ball in the internal end opening department of cone type, the net of hindering fire is located to establish in the department of the upper mouth of cone type body, establishes the briquetting on the edge of the upper mouth of cone type body, and the briquetting is compacted the back-fire relief net on the cone type body. The utility model discloses utilize the back-fire relief net to realize the carminative effect of back-fire relief, utilize the toper hydrostatic chamber of the conical body of gravity ball cooperation to realize steady voltage and automatic exhaust function, make the automatic safe exhaust of malleation cabinet, ensured that the malleation cabinet carries out gas replacement at malleation work and exhausts to and effectual realization back-fire relief effect and automatic pressure release exhaust effect when normal work exhausts, ensure the inside steady voltage of malleation cabinet.
Description
Technical Field
The utility model relates to an electrical control cabinet, concretely relates to malleation is automatic exhaust type flame arrester for cabinet is the used spark arrester of positive pressure type switch board that uses in the dangerous place that has inflammable and explosive gas to exist.
Background
With the rapid development of national economy, positive pressure type explosion-proof electrical products are widely applied in flammable and explosive places in the industries such as petroleum, chemical engineering, military industry, coal, textile, medicine, food processing, ocean transportation and the like. And the safe production, the civilized production is the indispensable part in the modern chemical production. Traditional explosion-proof electrical control cabinet of positive pressure type perhaps with the spark arrester device, perhaps sets up the internal thread ball valve at its front end, exhausts through artifical manual safety, perhaps increases explosion-proof solenoid valve, realizes malleation cabinet safety through explosion-proof solenoid valve switching and exhausts. Set up the manual exhaust of internal thread ball valve, be subject to the industrial field air supply, because the air supply is often unstable, need the operation personnel frequently to pay close attention to malleation chamber pressure, manual adjustment internal thread ball valve aperture avoids causing the interior outage of malleation cabinet because of the pressure fluctuation. Automatic safe exhaust control is realized through the explosion-proof electromagnetic valve, when the air source is unstable, the electromagnetic valve frequently acts, the service life of the electromagnetic valve is obviously influenced, when the electromagnetic valve acts, the noise is high, the price of the explosion-proof electromagnetic valve is high, and the cost of the positive pressure cabinet is obviously increased. To date, no satisfactory solution exists for automatic exhaust and fire resistance of a positive pressure control cabinet.
Disclosure of Invention
Not enough to current positive pressure control automatic safety exhaust existence, the utility model aims to solve the technical problem that an automatic exhaust type flame arrester for malleation cabinet is provided, the automatic safety exhaust of malleation cabinet can be realized to utilizing this spark arrester, ensures the interior steady voltage of malleation cabinet.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: an automatic exhaust type flame arrester for a positive pressure cabinet comprises a right-angle bend, one end of the right-angle bend is connected with the positive pressure cabinet, a conical body is embedded in the other end opening of the right-angle bend, and the inner cavity of the conical body is in an inverted cone shape and is communicated with the right-angle bend; a gravity ball is placed at the lower opening in the conical body, a fire-retardant net is arranged at the upper opening of the conical body, a pressing block is arranged on the upper opening edge of the conical body, and the fire-retardant net is compacted on the conical body by the pressing block.
The gravity ball is formed by flame retardant materials.
The fire-retardant net is formed by sintering a stainless steel sintered steel net at one time.
The pressing block is connected with the conical body in a matched mode through sealing threads.
In order to prevent outdoor rain, a rain cover bracket is arranged on the right-angle elbow, and a rain cover is arranged on the rain cover bracket.
The utility model adopts the above technical scheme design malleation is auto-exhaust type fire damper for cabinet, establish the conical body that the inner chamber is the back taper through the elbow bend tip of being connected with the malleation cabinet, establish the gravity ball in the internal end opening department of conical body, establish fire prevention net in the department of the upper port of conical body, utilize fire prevention net to realize the carminative effect of back-fire relief, utilize the toper hydrostatic chamber of gravity ball cooperation conical body, realize steady voltage and auto-exhaust function, make the automatic safe exhaust of malleation cabinet, ensure the inside steady voltage of malleation cabinet. The outdoor rainproof function can be realized by utilizing the rainproof cover. The utility model discloses ensured that the malleation cabinet carries out gas replacement at malleation work and exhausts to and when normal work is exhausted, effectual realization back-fire relief effect and automatic pressure release exhaust effect ensure the establishment of malleation environment and the normal during operation of switch board, dangerous place environmental safety.
Drawings
Fig. 1 is a schematic structural view of an automatic exhaust type flame arrester for a positive pressure cabinet according to the present invention;
fig. 2 shows a schematic view of the installation structure of the present invention.
Detailed Description
The following describes the automatic exhaust type fire damper for positive pressure cabinet in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the utility model discloses malleation is automatic exhaust type fire arrester for cabinet, including elbow bend 7 that one end is connected with malleation cabinet 8, embedding the conical body 5 of being made by stainless steel in elbow bend 7's the other end port, the inner chamber of conical body 5 is the back taper and is linked together with elbow bend 7. A gravity ball 4 is placed at the lower opening in the conical body 5, the gravity ball 4 is formed by flame retardant material glass fiber reinforced unsaturated polyester, the weight and the outer diameter of the gravity ball are calculated according to the positive pressure cavity pressure, the gas path pipe diameter and the like according to a physical formula, and then the gravity ball is determined after comparison of multiple specifications and multiple groups of experiments. The fire-retarding net 3 is arranged at the upper opening of the conical body 5, the pressing block 2 is arranged on the upper opening edge of the conical body 5, the pressing block 2 is connected with the conical body 5 in a sealing threaded fit mode, and the pressing block 2 compacts the fire-retarding net 3 on the conical body 5. The utility model discloses a 3 materials of back-fire relief net are stainless steel sintering steel meshes, through the one shot forming, except having certain mechanical strength, ventilative, the characteristics of falling energy, still have the explosion-proof and resistant fever performance. After the flame passes through the tiny channel on the fire retardant element, the flame becomes a plurality of tiny flames, the contact area of the sintered steel mesh channel wall and the tiny flames is greatly increased, the flame is reduced below the ignition point, and therefore the functions of reducing energy and preventing the flame from spreading are achieved. After the fire blocking net isolates the passing gas, safe emission is realized, and the occurrence of dangerous gas environment explosion conditions is avoided. The inner cavity of the conical body 5 is communicated with the atmospheric environment through the fire blocking net 3, a relatively stable static pressure environment can be built in the inner conical cavity, and when the gravity ball 4 overcomes the self weight to float, the pressure in the conical cavity cannot be suddenly increased and is still the atmospheric pressure of the equipment environment.
In order to prevent outdoor rain, a rain cover bracket 6 is arranged on the elbow 7, a rain cover 1 is arranged on the rain cover bracket 6, and the fire arrester is covered by the rain cover 1 to avoid rain.
The utility model discloses a spark arrester 9 not only accessible quarter bend 7 is connected with malleation cabinet 8, can also be connected with malleation cabinet 8 through the loose joint. The flame arrester 9 can be installed on the side of the positive pressure cabinet 8, and also can be installed on the ground and other positions, and the installation mode is flexible.
According to the national explosion-proof standard, the normal working pressure of the positive-pressure cabinet body is 50-400 Pa. When the internal pressure of the positive pressure cavity is higher than 400Pa, the internal pressure of the pipeline pushes the gravity ball 4 to overcome gravity suspension, the gas passage is opened, and high-pressure gas is discharged to the external environment through the fire blocking net 3, so that the functions of exhausting and reducing pressure are realized. After the positive pressure cavity gas is discharged, the internal pressure is reduced, and the gravity ball 4 falls into the conical opening under the action of self gravity, so that a gas passage is closed, and the pressure of the positive pressure cavity is ensured to be below 400 Pa.
The utility model discloses malleation is automatic exhaust type fire arrester for cabinet requires the special needs design production according to explosion-proof malleation cabinet pressure control, and the specificity is strong. The action core is that the flame-retardant gravity ball component executes action according to the air pressure condition, the purposes of pressure stabilization and safe exhaust are realized, the action is reliable and stable, the installation mode is flexible, the life cycle is long, and the requirement of use under severe environment is met.
Claims (5)
1. An automatic exhaust type flame arrester for a positive pressure cabinet is characterized by comprising a right-angle bend, one end of the right-angle bend is connected with the positive pressure cabinet, a conical body is embedded in the other end opening of the right-angle bend, and the inner cavity of the conical body is in an inverted cone shape and is communicated with the right-angle bend; a gravity ball is placed at the lower opening in the conical body, a fire-retardant net is arranged at the upper opening of the conical body, a pressing block is arranged on the upper opening edge of the conical body, and the fire-retardant net is compacted on the conical body by the pressing block.
2. The automatic exhaust type fire damper for a positive pressure cabinet according to claim 1, wherein the weight ball is a weight ball molded from a flame retardant material.
3. The automatic exhaust type fire damper for the positive pressure cabinet according to claim 1, wherein the fire damper net is formed by sintering a stainless steel sintered mesh in one step.
4. The automatic exhaust type fire damper for the positive pressure cabinet according to claim 1, wherein the pressing block is connected with the conical body by a sealing thread fit.
5. The automatic exhaust type fire damper for a positive pressure cabinet according to claim 1, wherein a rain cover support is provided on the right-angled elbow, and a rain cover is provided on the rain cover support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922170268.0U CN211410783U (en) | 2019-12-06 | 2019-12-06 | Automatic exhaust type fire damper for positive pressure cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922170268.0U CN211410783U (en) | 2019-12-06 | 2019-12-06 | Automatic exhaust type fire damper for positive pressure cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211410783U true CN211410783U (en) | 2020-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922170268.0U Active CN211410783U (en) | 2019-12-06 | 2019-12-06 | Automatic exhaust type fire damper for positive pressure cabinet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110870959A (en) * | 2019-12-06 | 2020-03-10 | 南阳市一通防爆电气有限公司 | Automatic exhaust type fire damper for positive pressure cabinet |
| CN113465393A (en) * | 2021-05-31 | 2021-10-01 | 河北恒博新材料科技股份有限公司 | Novel IGZO atmosphere preheats fritting furnace |
-
2019
- 2019-12-06 CN CN201922170268.0U patent/CN211410783U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110870959A (en) * | 2019-12-06 | 2020-03-10 | 南阳市一通防爆电气有限公司 | Automatic exhaust type fire damper for positive pressure cabinet |
| CN113465393A (en) * | 2021-05-31 | 2021-10-01 | 河北恒博新材料科技股份有限公司 | Novel IGZO atmosphere preheats fritting furnace |
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