CN212839587U - Fire hazard backfire and dust explosion early warning device - Google Patents

Abstract

The utility model relates to a conflagration early warning technical field just discloses a conflagration backfire and dust explosion early warning device, the power distribution box comprises a box body, the lateral wall of the box left and right sides is fixed intercommunication respectively has intake pipe and outlet duct, fixedly connected with air inlet regulating valve in the intake pipe, fixedly connected with air outlet regulating valve on the outlet duct, the lateral wall fixedly connected with oxygen source of box upside, the venthole has been seted up to the lateral wall of box upside, the pore wall fixedly connected with outlet duct of venthole, the venthole is stretched out to the upper end of outlet duct, the outer fixed cover of outlet duct is equipped with the air duct, the upper end fixedly connected with toper exhaust head of air duct, the inner wall fixedly connected with limiting plate. The utility model discloses can be effectual the inside and outside pressure difference of balanced box, the effectual box of having avoided produces the problem of incident easily when carrying out the burning test inside pressure is too big, has improved the security of using.

Description

Fire hazard backfire and dust explosion early warning device

Technical Field

The utility model relates to a conflagration early warning technical field especially relates to a conflagration is fired back and dust explosion early warning device.

Background

When a fire disaster occurs, a large amount of dense smoke is often generated and carries a large amount of toxic gas, especially in a closed environment, death personnel in a fire scene are often not burned, but a large amount of dense smoke causes oxygen deficiency suffocation or toxic gas inhalation death, and secondary backfire and even explosion possibility exist, so that a fire backfire and dust explosion early warning device is needed to be used for early warning.

Through retrieval, the fire hazard flashback and dust explosion early warning device provided by the patent number CN209433519U comprises a box body and a processor; the opposite side walls of the box body are respectively provided with an air inlet pipe orifice and an air outlet pipe orifice, the air inlet pipe orifice is provided with an air inlet regulating valve and an induced draft fan which are connected with the processor, and the air outlet pipe orifice is provided with an air outlet regulating valve which is connected with the processor; and the air inlet end of the air inlet regulating valve is provided with an air inlet hose for the sample gas to be detected to enter. The fire hazard backfire and dust explosion early warning device provided by the patent has the following defects: the box that above-mentioned early warning device is used for the burning lacks pressure relief device, and atmospheric pressure in the box can rise when carrying out the burning test, because above-mentioned early warning device's box is sealed, the inside incident that will strengthen when too big produces easily of box.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the box of early warning device among the prior art produced the incident easily when burning the test inside pressure is too big, and a conflagration backfire and dust explosion early warning device that provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a fire hazard flashback and dust explosion early warning device comprises a box body, wherein the side walls of the left side and the right side of the box body are respectively and fixedly communicated with an air inlet pipe and an air outlet pipe, the air inlet pipe is fixedly connected with an air inlet regulating valve, the air outlet pipe is fixedly connected with an air outlet regulating valve, the side wall of the upper side of the box body is fixedly connected with an oxygen source, the side wall of the upper side of the box body is provided with an air outlet hole, the hole wall of the air outlet hole is fixedly connected with an air outlet pipe, the upper end of the air outlet pipe extends out of the air outlet hole, the air outlet pipe is fixedly sleeved with an air guide pipe, the upper end of the air guide pipe is fixedly connected with a conical exhaust head, the inner wall of the conical exhaust head is fixedly connected with a limiting plate, the side wall of the, the upper end of the connecting rod stretches out of the conical exhaust head and is fixedly connected with a rubber sealing ball, and the lower end of the connecting rod is fixedly connected with a counterweight ball.

Preferably, the hole wall of the limiting hole is symmetrically and fixedly connected with two limiting sliding blocks, and the rod wall of the connecting rod is symmetrically provided with two limiting sliding grooves matched with the limiting sliding blocks.

Preferably, the air duct is sleeved outside the air outlet pipe through threads.

Preferably, a sealing ring is fixedly sleeved outside the air outlet pipe and is positioned below the air guide pipe.

Preferably, the upper end of the conical exhaust head is fixedly connected with a rubber sealing gasket.

Preferably, the side walls of the left side and the right side of the box body are fixedly connected with mounting plates.

Compared with the prior art, the utility model provides a conflagration is fired back and dust explosion early warning device possesses following beneficial effect:

the fire hazard flashback and dust explosion early warning device comprises a box body, an air outlet hole, an air outlet pipe, a conical exhaust head, a limiting plate, a limiting hole, a connecting rod, a rubber sealing ball and a counterweight ball, wherein when the air pressure in the box body reaches a critical point during use, air enters the air outlet pipe through the air outlet hole, finally the air enters an air guide pipe, the air in the air guide pipe pushes the rubber sealing ball upwards to enable the rubber sealing ball to move upwards so as to remove the sealing of the rubber sealing ball on the conical exhaust head, high-pressure air in the box body is exhausted through the conical exhaust head, the pressure in the box body is gradually reduced along with the exhausting of the high-pressure air, the counterweight ball gradually moves downwards under the action of the self gravity of the counterweight ball, the counterweight ball drives the connecting rod to move downwards, the connecting rod drives the rubber sealing ball to move downwards, when the rubber sealing ball is, can accomplish again sealed to the box, the inside and outside pressure difference of this device can effectual balance box, the effectual box of having avoided when carrying out the burning test problem that the inside pressure is too big produces the incident easily, has improved the security of using.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, the utility model discloses can be effectual the internal and external pressure difference of balance box, the effectual box of having avoided produces the problem of incident easily too big when carrying out the burning test internal pressure, has improved the security of using.

Drawings

Fig. 1 is a schematic structural view of a fire flashback and dust explosion early warning device provided by the present invention;

FIG. 2 is a schematic structural view of portion A of FIG. 1;

fig. 3 is a schematic structural view of a portion B in fig. 2.

In the figure: the air outlet device comprises a box body 1, an air outlet hole 2, an air outlet pipe 3, an air guide pipe 4, a conical exhaust head 5, a limiting plate 6, a limiting hole 7, a connecting rod 8, a rubber sealing ball 9, a counterweight ball 10, a limiting slide block 11, a limiting slide groove 12, a sealing ring 13, a rubber sealing washer 14 and a mounting plate 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-3, a fire flashback and dust explosion early warning device comprises a box body 1, wherein the side walls of the left side and the right side of the box body 1 are respectively and fixedly communicated with an air inlet pipe and an air outlet pipe, the air inlet pipe is fixedly connected with an air inlet regulating valve, the air outlet pipe is fixedly connected with an air outlet regulating valve, the side wall of the upper side of the box body 1 is fixedly connected with an oxygen source, the side wall of the upper side of the box body 1 is provided with an air outlet hole 2, the hole wall of the air outlet hole 2 is fixedly connected with an air outlet pipe 3, the upper end of the air outlet pipe 3 extends out of the air outlet hole 2, the air outlet pipe 3 is fixedly sleeved with an air duct 4, the upper end of the air duct 4 is fixedly connected with a conical exhaust head 5, the inner wall of the conical exhaust head 5 is fixedly connected with a limiting plate 6, when the air pressure in the box body 1 reaches a critical point, gas enters the air outlet pipe 3 through the air outlet hole 2, finally the gas enters the air guide pipe 4, the gas in the air guide pipe 4 pushes the rubber sealing ball 9 upwards to enable the rubber sealing ball 9 to move upwards, the sealing of the rubber sealing ball 9 on the conical exhaust head 5 is relieved, high-pressure gas in the box body 1 is exhausted through the conical exhaust head 5, the pressure in the box body 1 is gradually reduced along with the exhaust of the high-pressure gas, the weight ball 10 gradually moves downwards under the action of the self gravity of the weight ball 10, the weight ball 10 drives the connecting rod 8 to move downwards, the connecting rod 8 drives the rubber sealing ball 9 to move downwards, and when the rubber sealing ball 9 is clamped with the conical exhaust head 5, can accomplish again sealed to box 1, the inside and outside pressure difference of this device can effectual balanced box 1, the effectual problem of having avoided box 1 too big easy incident that produces of internal pressure when carrying out the burning test has improved the security of using.

Two spacing sliders 11 of pore wall symmetry fixedly connected with in spacing hole 7, two and 11 assorted spacing spouts 12 of spacing slider are seted up to the pole wall symmetry of connecting rod 8, mutually support through spacing slider 11 and spacing spout, can carry on spacingly to connecting rod 8, avoid the portable slope of connecting rod 8.

The air duct 4 is sleeved outside the air outlet pipe 3 by screw threads, so that the air duct 4 is convenient to disassemble and maintain.

The outer fixed cover of outlet duct 3 is equipped with sealing washer 13, and sealing washer 13 is located the below of air duct 4, and sealing washer 13 can improve the leakproofness of air duct 4 and outlet duct 3 junction.

The upper end fixedly connected with rubber seal ring 14 of toper exhaust head 5, rubber seal ring 14 can improve the leakproofness of rubber seal ball and toper exhaust head 5 junction.

The equal fixedly connected with mounting panel 15 of lateral wall of the left and right sides of box 1 is convenient for carry out fixed mounting to box 1.

The utility model discloses in, during the use, when the critical point is reachd to atmospheric pressure in the box 1, gaseous 2 entering outlet duct 3 that pass through the venthole, final gaseous entering air duct 4, gaseous upwards promotion rubber sealing ball 9 in the air duct 4, make rubber sealing ball 9 rebound, remove rubber sealing ball 9 to toper exhaust head 5 sealed, high-pressure gas in the box 1 passes through toper exhaust head 5 and discharges, along with high-pressure gas's discharge, pressure in the box 1 reduces gradually, and under the effect of counter weight ball 10 self gravity, counter weight ball 10 moves down gradually, counter weight ball 10 drives connecting rod 8 and moves down, connecting rod 8 drives rubber sealing ball 9 and moves down, when rubber sealing ball 9 and toper exhaust head 5 block, can accomplish the sealing to box 1 again, this device can effectual inside and outside pressure difference of balanced box 1, the effectual box 1 of having avoided when carrying out the burning test internal pressure too big easy problem that produces the incident The use safety is improved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. The utility model provides a conflagration is fired back and dust explosion early warning device, includes box (1), the lateral wall of the box (1) left and right sides is fixed respectively and is communicated has intake pipe and outlet duct, fixedly connected with air inlet adjusting valve in the intake pipe, fixedly connected with air outlet adjusting valve on the outlet duct, the lateral wall fixedly connected with oxygen source of box (1) upside, its characterized in that, venthole (2) have been seted up to the lateral wall of box (1) upside, the pore wall fixedly connected with outlet duct (3) of venthole (2), venthole (2) stretch out in the upper end of outlet duct (3), outlet duct (3) external fixation cover is equipped with air duct (4), the upper end fixedly connected with toper aiutage (5) of air duct (4), the inner wall fixedly connected with limiting plate (6) of toper aiutage (5), spacing hole (7) have been seted up to the lateral wall, connecting rod (8) have been cup jointed to spacing hole (7) internalization, spacing hole (7) are all stretched out at the both ends of connecting rod (8), the pore wall of spacing hole (7) and the pole wall sliding connection of connecting rod (8), toper exhaust head (5) and fixedly connected with rubber sealing ball (9) are stretched out to the upper end of connecting rod (8), the lower extreme fixedly connected with counterweight ball (10) of connecting rod (8).

2. A fire flashback and dust explosion early warning device as claimed in claim 1, wherein the wall of the limiting hole (7) is symmetrically and fixedly connected with two limiting slide blocks (11), and the rod wall of the connecting rod (8) is symmetrically provided with two limiting slide grooves (12) matched with the limiting slide blocks (11).

3. A fire flashback and dust explosion early warning device as claimed in claim 1, wherein the air duct (4) is threaded outside the air outlet tube (3).

4. A fire flashback and dust explosion early warning device as claimed in claim 1, wherein the gas outlet pipe (3) is externally fixed with a sealing ring (13), and the sealing ring (13) is located below the gas guide pipe (4).

5. A fire flashback and dust explosion early warning apparatus as claimed in claim 1, wherein the upper end of the conical exhaust head (5) is fixedly connected with a rubber sealing gasket (14).

6. A fire flashback and dust explosion early warning apparatus as claimed in claim 1, wherein the side walls of the left and right sides of the box body (1) are fixedly connected with mounting plates (15).

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