Automatic fire extinguishing ventilation cabinet for laboratory

Abstract

The utility model belongs to the field of laboratory equipment, and particularly relates to an automatic fire extinguishing ventilation cabinet for a laboratory, which comprises a ventilation cabinet body, a fixed cabinet is fixedly connected to the top end of the ventilation cabinet body, a fan is arranged in the fixed cabinet, a moving mechanism is arranged at the bottom end of the fixed cabinet and comprises a cavity, the cavity is formed in the fan, and a threaded rod is rotationally connected to the left side of the inner wall of the cavity. The right side of the threaded rod is fixedly connected with a servo motor, the bottom end of the servo motor is fixedly connected to the fixing frame, the threaded rod is in threaded connection with a moving block, and the bottom end of the moving block is fixedly connected with a sliding block. The sliding block is slidably connected into a through groove, the through groove is formed in the bottom end of the inner wall of the cavity, and the bottom end of the sliding block is rotationally connected with a rotating block. And through the structural design of the moving mechanism, the function of moving the position of the spray head on the ventilation cabinet body is achieved.

Description

Technical Field

[0001] The utility model relates to the field of laboratory equipment, in particular to an automatic fire extinguishing fume hood for a laboratory. Background Art

[0002] Corresponding fume hoods are equipped in laboratories to meet teaching or experimental needs, but various flammable items may be placed in the fume hood, so there are certain safety hazards, and it is necessary to automatically extinguish the fire when the fume hood catches fire.

[0003] The existing automatic fire extinguishing fume hoods for laboratories can be specifically referred to the Chinese utility model patent with application number: CN202021847309.1. A fume hood with automatic fire extinguishing function relates to the field of laboratory equipment technology, including a fume hood body, the fume hood body is provided with an exhaust duct and a glass lifting door, and also includes a fire extinguishing mechanism, a flame detector and a control unit. The fire extinguishing mechanism includes a fire extinguisher tank and a fire extinguishing nozzle. The fire extinguisher tank is installed on the fume hood body, and an automatic valve is provided at the outlet of the fire extinguisher tank. The fire extinguishing nozzle is installed in the fume hood and connected to the automatic valve through a fire extinguishing hose. The flame detector is installed in the fume hood to detect the occurrence of flames, and the control unit is electrically connected to the flame detector and the automatic valve respectively; the situation in the fume hood is detected by the flame detector, and the items that can be handled in the cabinet are detected by the flame detector at the early stage of the fire and a signal is sent, and the controller controls the automatic fire extinguisher to link and spray the fire extinguishing agent to quickly and automatically extinguish the fire.

[0004] However, in the fume hood with automatic fire extinguishing function in the above technology, the position of the fire extinguishing nozzle is fixed and cannot be moved. The liquid sprayed from the nozzle can only evenly cover the fume hood body through the guide plate, and the fire cannot be extinguished at the fire site, resulting in low fire extinguishing efficiency. Therefore, in view of the above problems, an automatic fire extinguishing fume hood for laboratory is proposed. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, the position of the fire extinguishing nozzle of the fume hood with automatic fire extinguishing function in the above-mentioned technology is fixed and cannot be moved. The liquid sprayed from the nozzle can only evenly cover the fume hood body through the guide plate, and the fire cannot be extinguished at the fire site, resulting in low fire extinguishing efficiency. The utility model proposes an automatic fire extinguishing fume hood for laboratory use.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model is a kind of automatic fire extinguishing fume hood for laboratory, comprising a fume hood body; the top of the fume hood body is fixedly connected with a fixed cabinet, a fan is arranged inside the fixed cabinet, a moving mechanism is arranged at the bottom of the fixed cabinet, the moving mechanism comprises a cavity, the cavity is opened inside the fan, the left side of the inner wall of the cavity is rotatably connected with a threaded rod, the right side of the threaded rod is fixedly connected with a servo motor, the bottom end of the servo motor is fixedly connected to a fixed frame, a moving block is threadedly connected on the threaded rod, and the bottom end of the moving block is fixedly connected with a slider. The slider is slidably connected in a through groove, the through groove is opened at the bottom end of the inner wall of the cavity, the bottom end of the slider is rotatably connected with a rotating block, the rotating block is fixedly connected with a nozzle, a telescopic tube is inserted on one side of the nozzle, the bottom end of the telescopic tube is inserted on a water pump, one side of the water pump is inserted inside a water tank, and the bottom ends of the water pump and the water tank are both fixedly connected inside a casing.

[0007] Preferably, both left and right sides of the inner wall of the through groove are fixedly connected to cushion blocks, and the cushion blocks are made of rubber.

[0008] Preferably, a fixing ring is sleeved on the telescopic tube, and the top end of the fixing ring is fixedly connected to the bottom end of the fixed cabinet.

[0009] Preferably, two groups of guide rods are passed through the interior of the moving block, and the left and right sides of the guide rods are fixedly connected to the inner wall of the cavity.

[0010] Preferably, damping components are provided on both the left and right sides of the rotating block, and the damping components include rubber rings and iron rings. The rubber rings are provided in three groups, and the iron rings are provided in two groups.

[0011] Preferably, a drainage groove is provided on the fume hood body, and a drainage port is provided at the rear end of the fume hood body, and the drainage port is communicated with the bottom end of the drainage groove.

[0012] The utility model is beneficial in that:

[0013] 1. The utility model realizes the function of moving the position of the nozzle on the fume hood body through the structural design of the moving mechanism, and solves the problem that the position of the fire extinguishing nozzle of the fume hood with automatic fire extinguishing function in the above-mentioned technology is fixed and cannot be moved, and the liquid sprayed by the nozzle can only cover the fume hood body evenly through the guide plate, and the fire cannot be extinguished in a centralized manner at the fire place, resulting in low fire extinguishing efficiency;

[0014] 2. The utility model realizes the function of fixing the rotation angle of the rotating block on the slider through the structural design of the damping component. Three groups of rubber rings and two groups of iron rings are stacked together, and the rubber rings squeeze the rotating block and the slider, so as to provide resistance when the rotating block is rotated, ensuring that the rotating block can rotate at any angle while fixing the angle and is not easy to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the rear end of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure inside the cavity of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the bottom end of the fixed cabinet of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the damping component of the utility model.

[0021] In the figure: 1, fume hood body; 20, fixed cabinet; 21, fan; 22, cavity; 23, moving block; 24, threaded rod; 25, through groove; 26, slider; 27, rotating block; 28, nozzle; 29, telescopic tube; 30, water pump; 31, water tank; 32, drain trough; 33, casing; 34, drain outlet; 35, fixing ring; 36, servo motor; 37, fixing frame; 38, guide rod; 39, cushion block; 40, rubber ring; 41, iron ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 - Figure 5As shown, an automatic fire extinguishing fume hood for laboratory use includes a fume hood body 1; a fixed cabinet 20 is welded on the top of the fume hood body 1, the fixed cabinet 20 is rectangular in design, a fan 21 is arranged inside the fixed cabinet 20, and a moving mechanism is arranged at the bottom of the fixed cabinet 20, the moving mechanism includes a cavity 22, the cavity 22 is long rectangular in design, the cavity 22 is opened inside the fan 21, a threaded rod 24 is rotatably connected to the left side of the inner wall of the cavity 22, the right side of the threaded rod 24 is fixedly connected to the servo motor 36, the right side of the threaded rod 24 passes through the cavity 22 and is connected to the transmission shaft of the servo motor 36, the bottom end of the servo motor 36 is welded and fixed to a fixed frame 37, the fixed frame 37 is shaped and fixed to the fume hood body 1 by bolts, so as to facilitate the installation and disassembly of the rotating block 27, the threaded rod 24 A moving block 23 is threadedly connected, and the moving block 23 is rectangular in design, and the moving block 23 does not contact the inner wall of the cavity 22. The bottom end of the moving block 23 is welded and fixed to a slider 26, and the slider 26 is slidably connected in the through groove 25. The slider 26 is rectangular in design and adapted to the through groove 25 to facilitate the movement of the slider 26 in the through groove 25. The through groove 25 is arranged at the bottom end of the inner wall of the cavity 22, and the through groove 25 is long and rectangular in design and is used to connect the inside of the cavity 22 with the outside. The bottom end of the slider 26 is rotatably connected to a rotating block 27, and the rotating block 27 is fixedly connected to a nozzle 28. A telescopic tube 29 is inserted at one side of the nozzle 28, and the bottom end of the telescopic tube 29 is inserted on a water pump 30. One side of the water pump 30 is inserted inside a water tank 31, and the bottom ends of the water pump 30 and the water tank 31 are both fixed to the inside of the casing 33 by gluing;

[0024] When working, the position of the fire extinguishing nozzle of the fume hood with automatic fire extinguishing function in the above technology is fixed and cannot be moved. The liquid sprayed by the nozzle can only evenly cover the fume hood body through the guide plate, and the fire cannot be extinguished at the fire site, which makes the fire extinguishing efficiency low. The function of moving the nozzle 28 on the fume hood body 1 is realized through the structural design of the moving mechanism. The fixed cabinet 20 is used to maintain the normal ventilation demand of the fume hood body 1. When a certain position on the fume hood body 1 is on fire, the servo motor 36 is driven first. The threaded rod 24 in the lower cavity 22 rotates and moves the moving block 23 threadedly connected to the threaded rod 24. The moving block 23 drives the slider 26 at the bottom to move in the through groove 25, thereby moving the nozzle 28 to the fire position, and extinguishing the fire at the fire position through the nozzle 28, so as to improve the fire extinguishing efficiency of the nozzle 28. The bottom end of the servo motor 36 is fixed on the fixing frame 37, and the fixing frame 37 is fixed to the top of the fume hood body 1 by bolts. The casing 33 is used to provide protection for the internal water pump 30 and water tank 31.

[0025] Furthermore, the pads 39 are glued and fixed on the left and right sides of the inner wall of the through slot 25. The width and height of the pads 39 are consistent with the through slot 25. The pads 39 are made of rubber.

[0026] During operation, the cushion block 39 is made of rubber material to ensure that when the slider 26 moves to the maximum position in the through slot 25 , the slider 26 does not directly abut against the inner wall of the through slot 25 , thereby avoiding damage.

[0027] Furthermore, a fixing ring 35 is sleeved on the telescopic tube 29, and the top end of the fixing ring 35 is fixed to the bottom end of the fixed cabinet 20 by welding;

[0028] During operation, the fixing ring 35 is used to keep the position of the telescopic tube 29 fixed. The bottom end of the fixing ring 35 is larger than the diameter of the telescopic tube 29 to ensure that the fixing ring 35 does not interfere with the normal movement of the telescopic tube 29 .

[0029] Furthermore, two sets of guide rods 38 are inserted into the interior of the moving block 23, and both left and right sides of the guide rods 38 are fixed to the inner wall of the cavity 22 by welding;

[0030] During operation, the two sets of guide rods 38 are used to guide the moving block 23 when it moves on the threaded rod 24 , so as to ensure that the moving block 23 can move stably on the threaded rod 24 .

[0031] Further, damping components are provided on both the left and right sides of the rotating block 27, and the damping components include rubber rings 40 and iron rings 41. Three groups of rubber rings 40 are provided, and two groups of iron rings 41 are provided. The rubber rings 40 and the iron rings 41 are stacked alternately, and the rubber rings 40 squeeze one side of the slider 26 and the rotating block 27 to provide resistance when the rotating block 27 rotates.

[0032] During operation, the function of fixing the rotation angle of the rotating block 27 on the slider 26 is achieved through the structural design of the damping component. The three groups of rubber rings 40 and the two groups of iron rings 41 are stacked together, and the rubber rings 40 squeeze the rotating block 27 and the slider 26, so as to provide resistance when the rotating block 27 is rotated, ensuring that the rotating block 27 can rotate at any angle while also fixing the angle and is not easy to rotate.

[0033] Furthermore, a drainage groove 32 is provided on the fume hood body 1, and the drainage groove 32 is designed in a conical shape. A drainage port 34 is provided at the rear end of the fume hood body 1, and the drainage port 34 is designed in a rectangular shape. The drainage port 34 is connected to the bottom end of the drainage groove 32;

[0034] During operation, the drain groove 32 is opened to drain water or other liquids on the fume hood body 1 . After the liquid enters the drain groove 32 , it will eventually be discharged through the drain port 34 at the rear end.

[0035] Working principle: In the fume hood with automatic fire extinguishing function in the above technology, the position of the fire extinguishing nozzle is fixed and cannot be moved. The liquid sprayed by the nozzle can only cover the fume hood body evenly through the guide plate, and the fire cannot be extinguished centrally at the fire site, which makes the fire extinguishing efficiency low. The function of moving the nozzle 28 on the fume hood body 1 is realized through the structural design of the moving mechanism. The fixed cabinet 20 is used to maintain the normal ventilation demand of the fume hood body 1. When a certain position on the fume hood body 1 is on fire, the servo motor 36 is first turned on. The threaded rod 24 in the lower cavity 22 is driven to rotate, and the moving block 23 threadedly connected to the threaded rod 24 is moved. The moving block 23 drives the slider 26 at the bottom to move in the through groove 25, so as to move the nozzle 28 to the position of the fire, and the fire is concentratedly extinguished through the nozzle 28, so as to improve the fire extinguishing efficiency of the nozzle 28. The bottom end of the servo motor 36 is fixed on the fixing frame 37, and the fixing frame 37 is fixed to the top of the fume hood body 1 by bolts. The casing 33 is used to provide protection for the internal water pump 30 and water tank 31.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An automatic fire extinguishing fume hood for a laboratory, comprising a fume hood body (1); characterized in that: The top of the fume hood body (1) is fixedly connected to a fixed cabinet (20), a fan (21) is arranged inside the fixed cabinet (20), and a moving mechanism is arranged at the bottom of the fixed cabinet (20), the moving mechanism comprises a cavity (22), the cavity (22) is opened inside the fan (21), a threaded rod (24) is rotatably connected to the left side of the inner wall of the cavity (22), the right side of the threaded rod (24) is fixedly connected to a servo motor (36), the bottom end of the servo motor (36) is fixedly connected to a fixed frame (37), a moving block (23) is threadedly connected to the threaded rod (24), and the moving block The bottom end of the nozzle (23) is fixedly connected to a slider (26), the slider (26) is slidably connected in a through groove (25), the through groove (25) is provided at the bottom end of the inner wall of the cavity (22), the bottom end of the slider (26) is rotatably connected to a rotating block (27), the rotating block (27) is fixedly connected to a nozzle (28), a telescopic tube (29) is inserted at one side of the nozzle (28), the bottom end of the telescopic tube (29) is inserted on a water pump (30), one side of the water pump (30) is inserted inside a water tank (31), and the bottom ends of the water pump (30) and the water tank (31) are both fixedly connected inside a casing (33).

2. The automatic fire extinguishing fume hood for laboratory use according to claim 1, characterized in that: Cushion blocks (39) are fixedly connected to both left and right sides of the inner wall of the through groove (25), and the cushion blocks (39) are made of rubber material.

3. The automatic fire extinguishing fume hood for laboratory use according to claim 2, characterized in that: A fixing ring (35) is sleeved on the telescopic tube (29), and the top end of the fixing ring (35) is fixedly connected to the bottom end of the fixed cabinet (20).

4. The automatic fire extinguishing fume hood for laboratory use according to claim 3, characterized in that: Two groups of guide rods (38) are inserted into the interior of the moving block (23), and the left and right sides of the guide rods (38) are fixedly connected to the inner wall of the cavity (22).

5. The automatic fire extinguishing fume hood for laboratory use according to claim 4, characterized in that: Damping components are arranged on both the left and right sides of the rotating block (27), and the damping components include rubber rings (40) and iron rings (41). The rubber rings (40) are arranged in three groups, and the iron rings (41) are arranged in two groups.

6. The automatic fire extinguishing fume hood for laboratory use according to claim 5, characterized in that: A drainage groove (32) is provided on the fume hood body (1), and a drainage port (34) is provided at the rear end of the fume hood body (1), wherein the drainage port (34) is communicated with the bottom end of the drainage groove (32).

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