CN216877645U

CN216877645U - Automatic fire extinguishing type fume chamber

Info

Publication number: CN216877645U
Application number: CN202220350410.9U
Authority: CN
Inventors: 张春雨
Original assignee: Jiangxi Sifu Laboratory Equipment Co ltd
Current assignee: Jiangxi Sifu Laboratory Equipment Co ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-07-05
Anticipated expiration: 2032-02-21

Abstract

The utility model belongs to the technical field of fume hoods, and discloses an automatic fire-extinguishing type fume hood, which comprises: a fume hood; a container valve is arranged at the outlet of the fire extinguisher; the fire detection pipe is arranged in the fume hood, the first end of the fire detection pipe is connected with the container valve through a connecting pipe, the temperature is higher than the preset temperature, and the fire detection pipe can burst so that the fire extinguishing agent in the fire detection pipe can be sprayed out of the fume hood. When a fire disaster occurs in the fume hood, the temperature in the fume hood rises rapidly, and when the preset temperature is reached, the fire probe pipe bursts, so that the fire extinguishing agent in the fire extinguisher is sprayed into the fume hood through the fire probe pipe through the connecting pipe to extinguish the fire. It can be in the fume chamber after the very first time of starting a fire extinguish the fume chamber internal fire, has guaranteed experimenter's life and property safety.

Description

Automatic fire extinguishing type fume chamber

Technical Field

The utility model belongs to the technical field of fume hoods, and particularly relates to an automatic fire extinguishing type fume hood.

Background

Fume hoods are an integral part of laboratory ventilation design. In order for laboratory workers not to inhale or swallow some toxic, pathogenic or non-toxic chemicals and organisms, good ventilation should be provided in the laboratory. To prevent the absorption of some vapors, gases and particulates (smoke, soot, dust and aerosols), the pollutants must be removed by fume hoods, ventilation hoods or local ventilation.

The fume chamber is the test equipment that laboratory staff almost all contacted every day, except not inhaling poisonous, harmful gas, laboratory staff still receives the threat of harmful factor such as conflagration, electric shock. Fire is a common accident in a laboratory, and seriously threatens the life and property safety of laboratory personnel.

The general fume hood has the following reasons for fire: 1. direct action of open fire; 2. direct contact with hot objects; 3. electrical equipment and static-induced sparks; 4. the effect of the heat released by the chemical reaction; 5. overheating or sparking of objects due to mechanical reasons; 6. the influence of light energy. For example, a round-bottom flask filled with water is placed on or near a wooden worktable and has combustibles such as paper, and the combustibles can play a role of light gathering to cause combustion when being directly irradiated by sunlight.

After general laboratory fume chamber is on fire, need put out a fire with manual fire extinguisher, reaction time is slow like this, causes the injury for the experimenter easily, brings the damage to experimental facilities. Without experimenters, greater losses were incurred. The fume hood of the temperature-sensing automatic fire extinguishing device can extinguish the fire in the fume hood in the first time after the fire breaks out in the fume hood, and the life and property safety of experimenters is guaranteed.

Therefore, there is a need for an automatic fire extinguishing type fume hood to solve the above-mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide an automatic fire extinguishing type fume hood, which can extinguish the fire in the fume hood at the first time after the fire in the fume hood is started, so that the life and property safety of experimenters is ensured.

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

an automatic fire extinguishing type fume hood comprising:

a fume hood;

a container valve is arranged at the outlet of the fire extinguisher;

the fire detection pipe is arranged in the fume hood, the first end of the fire detection pipe is connected with the container valve through a connecting pipe, the temperature is higher than the preset temperature, and the fire detection pipe can burst so that the fire extinguishing agent in the fire detection pipe can be sprayed out of the fume hood.

As an optimal technical scheme of the automatic fire extinguishing type fume hood, the automatic fire extinguishing type fume hood further comprises a pressure switch, the pressure switch is connected with the second end of the fire detection pipe, the pressure switch is used for detecting the pressure in the fire detection pipe, and when the pressure in the fire detection pipe is lower than the preset pressure, the pressure switch gives an alarm.

As a preferred technical scheme of the automatic fire extinguishing type fume chamber, a one-way valve is arranged between the pressure switch and the fire detection pipe.

As a preferred technical scheme of automatic fire extinguishing type fume chamber, the second end of fire detection pipe is provided with the end cap.

As a preferred technical scheme of the automatic fire extinguishing type fume chamber, the automatic fire extinguishing type fume chamber also comprises a pressure gauge which is connected with the container valve and is used for detecting the pressure in the fire detection pipe.

As an optimal technical scheme of the automatic fire extinguishing type fume hood, the preset temperature is 160-180 ℃.

As an optimal technical scheme of the automatic fire extinguishing type fume hood, the preset pressure is 15 MPa.

Compared with the prior art, the utility model has the following beneficial effects:

when a fire disaster occurs in the fume hood, the temperature in the fume hood rises rapidly, and when the preset temperature is reached, the fire probe pipe bursts, so that the fire extinguishing agent in the fire extinguisher is sprayed into the fume hood through the fire probe pipe through the connecting pipe to extinguish the fire. It can be in the fume chamber after the very first time of starting a fire extinguish the fume chamber internal fire, has guaranteed experimenter's life and property safety.

Drawings

Fig. 1 is a schematic structural view of an automatic fire extinguishing type fume hood provided by the present invention.

Wherein, 1, a fume hood; 2. a fire extinguisher; 3. a container valve; 4. a fire detection pipe; 5. a connecting pipe; 6. a pressure switch; 7. a one-way valve; 8. and a pressure gauge.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1, the embodiment discloses an automatic fire extinguishing type fume chamber, which comprises a fume chamber 1, a fire extinguisher 2, a fire detection pipe 4, a pressure switch 6 and a pressure gauge 8.

Wherein, fire extinguisher 2 sets up outside fume chamber 1, and is provided with container valve 3 in the exit of fire extinguisher 2, plays the effect of whether the fire extinguishing agent of control fire extinguisher 2 is spout. During the ventilation operation of the ventilation hood 1, the container valve 3 is always in the open state. Wherein, fire extinguisher 2 adopts steel seamless gas cylinder, accords with the regulation of GB 5099-1994. The maximum working pressure of the steel cylinder is 15MPa, the hydraulic strength test is carried out under the working pressure of 1.5 times, the steel cylinder is kept for 3 minutes, the leakage phenomenon cannot occur, and no obvious residual deformation is caused. The hydraulic strength test is carried out under 1.1 times of working pressure, and the container has no bubble leakage. The hydraulic strength test is carried out under 3 times of working pressure, and the container cannot be cracked.

Wherein, the working pressure of the container valve 3 is not less than 15MPa, the hydraulic strength test is carried out under 1.5 times of the working pressure, the test is kept for 5 minutes, and the deformation and the leakage are avoided. The air tightness test is carried out under 1.1 times of working pressure, when the valve is in a closed state, no air bubbles leak, and when the valve is in an open state, the leakage amount of the air bubbles at each connecting sealing part does not exceed 20/min. The hydraulic strength test was carried out at 3 working pressures, without the container valve 3 and its accessories breaking. Salt spray corrosion tests were conducted without significant corrosion damage to the various parts of the vessel valve 3 and performance degradation. The safety vent membrane of the container should burst at 1.25 times the maximum operating pressure ± 0.0625 times the maximum operating pressure. The container valve 3 should be flexible and reliable in its action and must not be subject to any malfunction or structural damage. When the carbon dioxide container and the container valve 3 assembly are subjected to vibration tests, no structural damage can be caused to any part of the container and the container valve 3 assembly, and the net weight loss of the fire extinguishing agent cannot exceed 0.5 percent of the filling amount of the fire extinguishing agent. After the test is finished, the container valve 3 should be checked, and the container valve 3 should be able to work properly and be opened quickly and completely. The container and container valve 3 assembly should be able to withstand the maximum and minimum operating temperature cycles without excessive leakage and container valve 3 actuation failures, the loss of dry weight of fire suppressant should not exceed the fire suppressant fill level by 0.5%, and no actuation failures should occur when the container valve 3 is actuated. The container valve 3 is assembled to the container and can be normally operated after three impacts in any direction are applied.

Fire-detecting pipe 4 sets up in fume chamber 1, and the first end of fire-detecting pipe 4 is passed through connecting pipe 5 and is connected with container valve 3, also the fire extinguishing agent in the fire extinguisher 2 can let in to fire-detecting pipe 4 through connecting pipe 5. The fire detection pipe 4 can burst when exceeding the preset temperature, so that the fire extinguishing agent in the fire detection pipe 4 is sprayed out of the ventilation cabinet 1, and the fire extinguishing effect is achieved.

Specifically, the fireprobe tube 4 is a pressurized non-metallic hose having an outer diameter of 6mm and an inner diameter of 4 mm. Blasting in a certain temperature range, and spraying fire extinguishing agent or transmitting fire signal. The fire-detecting pipe 4 should not be brittle at the ambient temperature of-20 ℃ and not be softened or deformed at the ambient temperature of 55 ℃. The fire-detecting pipe 4 is kept for 2min at 140 +/-2 ℃ and should not be operated. Wherein the preset temperature is 160-180 ℃, namely the fire detecting pipe 4 acts within 20s at 170 +/-10 ℃. The working pressure of the fire-detecting pipe 4 should not be less than 1.0 MPa.

The second end of the fire-detecting pipe 4 is provided with a plug. The pressure switch 6 is connected with the second end of the fire detection pipe 4, the pressure switch 6 is used for detecting the pressure in the fire detection pipe 4, and when the pressure in the fire detection pipe 4 is lower than the preset pressure, the pressure switch 6 gives an alarm so that an experimenter can know that a fire disaster occurs. Wherein the preset pressure is 15MPa, and a one-way valve 7 is arranged between the pressure switch 6 and the fire probe pipe 4.

The pressure gauge 8 is connected to the container valve 3 for detecting the pressure in the probe tube 4, and the pressure gauge 8 may also be connected to the connection tube 5. The fire detecting pipe 4 is used as a fire detecting element, and certain pressure must be kept in the pipeline to effectively detect a fire source and explode automatically. To ensure its effectiveness and to prevent pressure leakage, the pressure inside the probe tube 4 is checked exponentially by the pressure gauge 8. The position of the pointer of the pressure gauge 8 is unchanged, and the pressure is not reduced, which indicates that no leakage exists. The pressure gauge 8 is mounted on the fire-detecting pipe 4, and the easy-to-view part is generally close to the container bottle group.

When a fire disaster occurs in the fume hood 1, the temperature in the fume hood 1 rises rapidly, and when the preset temperature is reached, the fire detection pipe 4 bursts, so that the fire extinguishing agent in the fire extinguisher 2 is sprayed into the fume hood 1 through the connecting pipe 5 through the fire detection pipe 4 to extinguish the fire. It can be in 1 in the fume chamber 1 the very first time with fume chamber 1 internal fire extinguish after the fire, guaranteed experimenter's life and property safety.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An automatic fire extinguishing type fume hood, characterized by comprising:

a fume hood (1);

a container valve (3) is arranged at the outlet of the fire extinguisher (2);

fire-detecting pipe (4), it sets up in fume chamber (1), the first end of fire-detecting pipe (4) pass through connecting pipe (5) with container valve (3) are connected, exceed and predetermine the temperature fire-detecting pipe (4) can burst, so that fire extinguishing agent in fire-detecting pipe (4) is to the blowout in fume chamber (1).

2. The automatic fire extinguishing type fume hood according to claim 1, further comprising a pressure switch (6) connected to a second end of said fire probe (4), said pressure switch (6) being adapted to detect a pressure inside said fire probe (4), said pressure switch (6) giving an alarm when the pressure inside said fire probe (4) is lower than a preset pressure.

3. A fumehood of the automatic fire extinguishing type according to claim 2, wherein a one-way valve (7) is provided between said pressure switch (6) and said fire probe (4).

4. The automatic fire extinguishing type fume hood according to claim 1, characterized in that the second end of the fire detecting pipe (4) is provided with a plug.

5. The automatic fire extinguishing type fume hood according to claim 1, further comprising a pressure gauge (8) connected to said container valve (3) for detecting the pressure inside said fire probe tube (4).

6. An auto-fire type fume hood according to claim 1, wherein said preset temperature is 160 ℃ -180 ℃.

7. A self-extinguishing fumehood according to claim 2 wherein said predetermined pressure is 15 MPa.