Ventilation cabinet with automatic fire extinguishing device

Abstract

The utility model discloses a fume cupboard with an automatic fire extinguishing device, which comprises a cupboard body, two symmetrically distributed flame sensors are fixed on the inner side of the cupboard body, protective shells are mounted below the two flame sensors, rotating plates are rotatably mounted on the surfaces of the protective shells, elastic plates are mounted inside the protective shells, and the elastic plates are fixed on the inner side of the cupboard body. A connecting water pipe is installed below the elastic plate, one end of the connecting water pipe penetrates through the cabinet body and is connected with a water supply pump, the other end of the connecting water pipe is connected with a rotary connecting pipe, a water outlet pipe is inserted into the other end of the rotary connecting pipe, and a rotary impeller is axially fixed to the end, inserted into the rotary connecting pipe, of the water outlet pipe; and a water outlet spherical shell is detachably mounted at the other end of the water outlet pipe. Water flow is sprayed out of the spraying holes in the surface of the water outlet spherical shell while rotating, the covering density of the water flow is increased, fire disasters can be controlled in a shorter time, and the using safety of the ventilation cabinet is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fume hoods, in particular to a fume hood with an automatic fire extinguishing device. Background Art

[0002] Cabinet exhaust hoods are commonly known as fume hoods. Similar to closed hoods, small parts spray paint cabinets and chemical laboratory fume hoods are typical structures of cabinet exhaust hoods. Large room-type fume hoods have one side completely open, and operators work inside the cabinet. They are mainly used for large-scale painting, powder bagging, etc. The working opening of the fume hood has a great influence on the airflow distribution in the cabinet, and the airflow distribution directly affects the working effect of the cabinet exhaust hood.

[0003] Fume hoods present fire safety hazards. Fire extinguishers are usually placed inside the fume hoods or fire sprinklers are installed for fire extinguishing. When a fire occurs, personnel will use fire extinguishers or open fire water sources to extinguish the fire.

[0004] When the fire extinguishing water source inside the fume hood is sprayed to extinguish the fire, the coverage density is small and there are blank areas. It is necessary to rely on the fluidity of the water flow after it comes into contact with the fume hood to extinguish the fire, and the fire extinguishing time is relatively long. Therefore, it does not meet the existing needs. In this regard, we propose a fume hood with an automatic fire extinguishing device. Utility Model Content

[0005] The purpose of the utility model is to provide a fume hood with an automatic fire extinguishing device to solve the problems raised in the above-mentioned background technology that the fire extinguishing water source inside the fume hood has a low coverage density and blank areas when spraying fire, and it is necessary to rely on the fluidity of the water flow after contacting the fume hood to extinguish the fire, and the fire extinguishing time is long.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fume hood with an automatic fire extinguishing device, comprising a cabinet body, two symmetrically distributed flame sensors are fixed on the inner side of the cabinet body, a protective shell is installed below the two flame sensors, a rotating plate is rotatably installed on the surface of the protective shell, an elastic plate is installed inside the protective shell, a connecting water pipe is installed below the elastic plate, one end of the connecting water pipe passes through the cabinet body and is connected to a water supply pump, the other end of the connecting water pipe is connected to a rotating connecting pipe, and the other end of the rotating connecting pipe is inserted into the A water outlet pipe is connected, and a rotating impeller is axially fixed to the end of the water outlet pipe inserted in the rotating connecting pipe. A water outlet spherical shell is detachably installed on the other end of the water outlet pipe. The outer surface of the water outlet spherical shell is provided with a plurality of spray holes distributed in a spherical array around the center of the sphere. A water outlet switch is installed below the connecting water pipe and the water outlet switch is fixed on the cabinet. An elastic connecting rope is connected between the water outlet switch and the rotating connecting pipe. A supporting shaft rod is fixed through the top end of the rotating connecting pipe. Both ends of the supporting shaft rod are inserted in the inner wall of the protective shell and the ends are covered with torsion springs.

[0007] Preferably, a plug hole is provided through the middle portion of the supporting shaft, and the end portion of the connecting water pipe connected to the rotating connecting pipe passes through the plug hole.

[0008] Preferably, the inner diameter of the plug hole is greater than or equal to the outer diameter of the connected water pipe, and the edge of the plug hole is rounded.

[0009] Preferably, an adsorption magnet is fixedly embedded on the inner side of the bottom end of the rotating plate, and an electromagnet is fixed inside the bottom end of the protective shell.

[0010] Preferably, the rotating plate is connected to the electromagnet bracket by magnetic adsorption, and the magnetic adsorption force of the electromagnet on the rotating plate is greater than the sum of the elastic force of the elastic plate and the torsional force of the two torsion springs.

[0011] Preferably, the top end of the elastic plate is bent downward at ninety degrees, and the top end of the elastic plate is slidably inserted into the interior of the protective shell.

[0012] Preferably, the axis of the rotating impeller coincides with the axis of the water outlet pipe, an L-shaped rod is fixed axially to the rotating impeller, and one end of the L-shaped rod is fixed to the inner wall of the end of the water outlet pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the case of a fire, the rotating plate rotates and the torsion spring performs reset rotation, and the rotating connecting pipe and the water outlet pipe rotate around the axis of the supporting shaft, and then the elastic connecting rope is pulled and the water outlet switch is triggered. At this time, the water supply pump delivers water to the connecting water pipe, and the water flows into the rotating connecting pipe and reaches the water outlet pipe. When the water flows into the water outlet pipe, it drives the rotating impeller and the water outlet pipe to rotate. At this time, the water flows while rotating while being ejected from the spray holes on the surface of the water outlet ball shell, thereby increasing the coverage density of the water flow, controlling the fire in a shorter time, and ensuring the safety of the fume hood when in use;

[0015] 2. The utility model distributes a plurality of spray holes in a spherical array on the surface of the water outlet spherical shell with the center of the spherical shell as the array origin, thereby maximizing the coverage area of ​​the water flow, increasing the fire extinguishing area, shortening the fire extinguishing time, and improving the fire extinguishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the protective shell of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the support shaft rod of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the water outlet ball shell of the utility model.

[0020] In the figure: 1. cabinet; 2. water outlet ball shell; 3. protective shell; 4. rotating plate; 5. flame sensor; 6. connecting water pipe; 7. water outlet switch; 8. elastic connecting rope; 9. electromagnet; 10. adsorption magnet; 11. water outlet pipe; 12. rotating impeller; 13. rotating connecting pipe; 14. supporting shaft; 15. elastic plate; 16. torsion spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] like Figures 1 to 4 As shown, a fume hood with an automatic fire extinguishing device comprises a cabinet body 1, two symmetrically distributed flame sensors 5 are fixed on the inner side of the cabinet body 1, a protective shell 3 is installed below the two flame sensors 5, a rotating plate 4 is rotatably installed on the surface of the protective shell 3, an elastic plate 15 is installed inside the protective shell 3, a connecting water pipe 6 is installed below the elastic plate 15, one end of the connecting water pipe 6 passes through the cabinet body 1 and is connected to a water supply pump, the other end of the connecting water pipe 6 is connected to a rotating connecting pipe 13, the other end of the rotating connecting pipe 13 is plugged with a water outlet pipe 11, the end of the water outlet pipe 11 plugged in the rotating connecting pipe 13 is axially fixed with a rotating impeller 12, the other end of the water outlet pipe 11 is detachably installed with a water outlet ball shell 2, the outer surface of the water outlet ball shell 2 is provided with a plurality of spray holes distributed in a spherical array around the center of the ball, a water outlet switch 7 is installed below the connecting water pipe 6 and the water outlet switch 7 is fixed to the cabinet body. 1, an elastic connecting rope 8 is connected between the water outlet switch 7 and the rotating connecting pipe 13, and a supporting shaft 14 is fixed to the top of the rotating connecting pipe 13. Both ends of the supporting shaft 14 are inserted into the inner wall of the protective shell 3 and the end is sleeved with a torsion spring 16. When a fire occurs, the rotating plate 4 rotates and the torsion spring 16 performs reset rotation and drives the rotating connecting pipe 13 and the water outlet pipe 11 to rotate around the axis of the supporting shaft 14. Then the elastic connecting rope 8 is pulled and triggers the water outlet switch 7. At this time, the water supply pump delivers water to the connecting water pipe 6, and the water flows into the rotating connecting pipe 13 and reaches the water outlet pipe 11. When the water flows into the water outlet pipe 11, it drives the rotating impeller 12 and the water outlet pipe 11 to rotate. At this time, the water flows while rotating while being ejected from the spray hole on the surface of the water outlet ball shell 2, thereby increasing the coverage density of the water flow, controlling the fire in a shorter time, and ensuring the safety of the fume hood when in use.

[0023] A plug hole is provided through the middle part of the supporting shaft 14, and the end of the connecting water pipe 6 connected to the rotating connecting pipe 13 passes through the plug hole. The inner diameter of the plug hole is greater than or equal to the outer diameter of the connecting water pipe 6, and the edge of the plug hole is rounded to ensure that the connecting water pipe 6 can be smoothly connected to the rotating connecting pipe 13, and after the connection, water can be supplied while not affecting the rotation of the rotating connecting pipe 13.

[0024] like Figure 2 As shown, an adsorption magnet 10 is fixedly embedded on the inner side of the bottom end of the rotating plate 4, an electromagnet 9 is fixed inside the bottom end of the protective shell 3, the rotating plate 4 is magnetically adsorbed and connected to the electromagnet 9 bracket, and the magnetic adsorption force of the electromagnet 9 on the rotating plate 4 is greater than the sum of the elastic force of the elastic plate 15 and the torsional force of the two torsion springs 16. Under normal circumstances, it is ensured that the water outlet pipe 11 and the water outlet ball shell 2 will not pop out from the protective shell 3.

[0025] The top of the elastic plate 15 is bent downward at 90 degrees, and the top of the elastic plate 15 is slidably inserted into the protective shell 3 to ensure that the elastic plate 15 will not be easily separated from the protective shell 3 when installed.

[0026] The axis of the rotating impeller 12 coincides with the axis of the water outlet pipe 11. An L-shaped rod is fixed axially to the rotating impeller 12. One end of the L-shaped rod is fixed to the inner wall of the end of the water outlet pipe 11, ensuring that the rotating impeller 12 drives the water outlet pipe 11 to rotate synchronously when rotating, thereby realizing the rotation of the water flow sprayed from the water outlet ball shell 2.

[0027] Working principle: When a fire occurs, the flame sensor 5 detects the flame and transmits the signal to the control center of the fume hood. After the control center recognizes the signal, it sends a signal to the water supply pump power supply connected to the water pipe 6. The water supply pump is powered on to start the water flow in the water pipe 6. At the same time, the power supply connected to the electromagnet 9 is cut off. At this time, the elastic plate 15 provides thrust to the rotating plate 4, so that the rotating plate 4 rotates upward, and the rotating plate 4 loses the pressure on the water outlet ball shell 2, the water outlet pipe 11, and the rotating connecting pipe 13, and the torsion spring 16 at the end of the supporting shaft rod 14 is restored. The water outlet pipe 11 rotates around the axis of the supporting shaft 14, and then the elastic connecting rope 8 is pulled and the water outlet switch 7 is triggered. At this time, the water supply pump delivers water to the connecting water pipe 6, and the water flows into the rotating connecting pipe 13 and reaches the water outlet pipe 11. When the water flows into the water outlet pipe 11, it drives the rotating impeller 12 and the water outlet pipe 11 to rotate. At this time, the water flows out from the spray holes on the surface of the water outlet ball shell 2 while rotating, thereby increasing the coverage density of the water flow, controlling the fire in a shorter time, and ensuring the safety of the fume hood when in use.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A fume hood with an automatic fire extinguishing device, comprising a hood body (1), characterized in that: Two symmetrically distributed flame sensors (5) are fixed on the inner side of the cabinet (1), and a protective shell (3) is installed below the two flame sensors (5). A rotating plate (4) is rotatably installed on the surface of the protective shell (3). An elastic plate (15) is installed inside the protective shell (3), and a connecting water pipe (6) is installed below the elastic plate (15). One end of the connecting water pipe (6) passes through the cabinet (1) and is connected to a water supply pump, and the other end of the connecting water pipe (6) is connected to a rotating connecting pipe (13). The other end of the rotating connecting pipe (13) is plugged with a water outlet pipe (11), and the water outlet pipe (11) is plugged into the rotating connecting pipe (11). 3), a rotating impeller (12) is axially fixed at the end of the water outlet pipe (11), a water outlet spherical shell (2) is detachably mounted on the other end of the water outlet pipe (11), a plurality of spray holes distributed in a spherical array around the center of the spherical shell (2) are provided on the outer surface of the water outlet spherical shell (2), a water outlet switch (7) is installed below the connecting water pipe (6), and the water outlet switch (7) is fixed on the cabinet (1), an elastic connecting rope (8) is connected between the water outlet switch (7) and the rotating connecting pipe (13), a supporting shaft (14) is fixedly passed through the top end of the rotating connecting pipe (13), both ends of the supporting shaft (14) are inserted into the inner wall of the protective shell (3), and the end is sleeved with a torsion spring (16).

2. A fume hood with an automatic fire extinguishing device according to claim 1, characterized in that: A plug hole is formed through the middle portion of the support shaft (14), and the end of the connecting water pipe (6) connected to the rotating connecting pipe (13) passes through the plug hole.

3. A fume hood with an automatic fire extinguishing device according to claim 2, characterized in that: The inner diameter of the plug hole is greater than or equal to the outer diameter of the connected water pipe (6), and the edge of the plug hole is rounded.

4. A fume hood with an automatic fire extinguishing device according to claim 1, characterized in that: An adsorption magnet (10) is fixedly embedded on the inner side of the bottom end of the rotating plate (4), and an electromagnet (9) is fixed inside the bottom end of the protective shell (3).

5. A fume hood with an automatic fire extinguishing device according to claim 4, characterized in that: The rotating plate (4) is connected to the electromagnet (9) bracket by magnetic adsorption, and the magnetic adsorption force of the electromagnet (9) on the rotating plate (4) is greater than the sum of the elastic force of the elastic plate (15) and the torsional force of the two torsion springs (16).

6. A fume hood with an automatic fire extinguishing device according to claim 1, characterized in that: The top end of the elastic plate (15) is bent downward at ninety degrees, and the top end of the elastic plate (15) is slidably inserted into the interior of the protective shell (3).

7. A fume hood with an automatic fire extinguishing device according to claim 1, characterized in that: The axis of the rotating impeller (12) coincides with the axis of the water outlet pipe (11); an L-shaped rod is fixed axially to the rotating impeller (12); one end of the L-shaped rod is fixed to the inner wall of the end of the water outlet pipe (11).

Images