CN210230959U

CN210230959U - Laboratory fume hood

Info

Publication number: CN210230959U
Application number: CN201920960721.5U
Authority: CN
Inventors: Ziyi Zhou; 周子轶; Kun Liu; 刘昆
Original assignee: Individual
Current assignee: Beijing Chengwei Borui Lab Equipment Co ltd; Liaoning Chengwei Laboratory Equipment Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-04-03
Anticipated expiration: 2029-06-24

Abstract

The utility model relates to a laboratory ventilation cabinet, relating to the technical field of experimental equipment, which comprises a workbench, a left side plate, a right side plate, a fan cover, a top plate, a cabinet body, a back plate and a protective door; the left side plate, the right side plate, the top plate, the workbench, the protective door and the back plate enclose a cavity, the fan cover is fixedly connected to the top plate, and the cabinet body is fixedly installed at the bottom of the workbench; the edge of the workbench is also provided with a blowing assembly for preventing air in the cavity from escaping from the workbench surface of the workbench; the blowing assembly comprises an air box, a plurality of fans arranged in the air box and a plurality of air outlet holes formed in the air box; the air box is fixedly connected to the workbench; when the bellows is mounted on the table, the air outlet is directed toward the inside of the chamber. The utility model discloses when having and opening the guard gate, blow in to the cavity automatically, prevent the effect that the harmful gas in the fume chamber escaped from the workstation mesa.

Description

Laboratory fume hood

Technical Field

The utility model belongs to the technical field of laboratory ventilation equipment's technique and specifically relates to a laboratory fume chamber is related to.

Background

The open laboratory bench is used basically in current chemical experiment process, and when carrying out the chemical experiment, produces some poisonous and harmful substance easily, and current laboratory bench can not carry out fine protection, and long-term operation experiment can be to the healthy harm of experimenter.

Chinese patent publication No. CN105915479A discloses a fume chamber, including left side board, right side board, air exhauster, baffle, storage tank, workstation, glass door and guide plate, the both ends at the workstation are installed respectively to left side board and right side board, and the baffle is installed between left side board and right side board, and the both sides of baffle are equipped with glass door and guide plate respectively, and the end of breathing in of air exhauster stretches into in the cavity, and the exhaust end of air exhauster stretches out outside the cavity, and storage tank fixed mounting is in the bottom of workstation. When the fume hood in the above-mentioned patent is used, the toxic gas that produces in the experiment is taken away to the air exhauster.

The above prior art solutions have the following drawbacks: when the exhaust fan extracts the air in the cavity, the air pressure in the cavity changes, so that the outside air can enter from the opening on the front side of the ventilation cabinet.

But when discharging the harmful gas in the cavity, depend on the convulsions efficiency of air exhauster completely, in addition in actual air exhauster arrangement, the air exhauster is generally arranged outdoors for the operational aspect of air exhauster can't obtain effectual monitoring, in case the air exhauster appears damaging and leads to the circumstances such as power decline, will influence taking out to harmful gas in the cavity.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a laboratory fume chamber, it has the effect that can blow the cavity internal gas for harmful gas's discharge in the cavity.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a laboratory ventilation cabinet comprises a workbench, a left side plate, a right side plate, a fan cover, a top plate, a cabinet body, a back plate and a protective door;

the edge of the workbench is also provided with a blowing assembly for preventing air in the cavity from escaping from the workbench surface of the workbench; the blowing assembly comprises an air box, a plurality of fans arranged in the air box and a plurality of air outlet holes formed in the air box; the air box is fixedly connected to the workbench;

when the bellows is mounted on the table, the air outlet is directed toward the inside of the chamber.

Through adopting above-mentioned technical scheme, when the guard gate on the fume chamber was opened, the fan started, and wind in the fan can blow off from the bellows, forms a wind curtain in the gate department of fume chamber for in the wind that the fan blew off got into the cavity, the reverse door department that is close to of prevention harmful gas, also can blow the harmful gas in the fume chamber, blows away harmful gas, makes things convenient for harmful gas's row away. Wherein, can set up the exit position department that is close to the cavity on the workstation with the subassembly of blowing, let the wind that the fan blew out have bigger effect scope on the workstation, harmful gas when preventing the experiment is discharged from guard gate department.

The utility model discloses further set up to: the air box comprises a transverse plate, a vertical plate, an arc-shaped plate and a sealing plate, and the transverse plate, the vertical plate, the arc-shaped plate and the sealing plate are fixedly connected; it is a plurality of the exhaust vent is arranged on the riser, and is a plurality of fan fixed connection is on the diaphragm.

Through adopting above-mentioned technical scheme, when the fan blew out wind, wind can earlier with the arc contact, the arc leads wind, lets wind more easy parallel and level get into in the cavity. And the staff can conveniently make bellows.

The utility model discloses further set up to: the edge of workstation offers the installation step face that is used for placing bellows, bellows fixed connection is on the installation step face.

Through adopting above-mentioned technical scheme, when bellows fixed connection was on the installation step, the diaphragm contacted with the bottom surface of installation step, set up the edge that the position of fan surpassed the workstation on the diaphragm moreover for bellows overlap joint is on the installation step when not fixed connection is on the workstation. And the vertical plate is in contact with a surface perpendicular to the bottom surface among the mounting step surfaces. Through setting up the installation step face, let the installation step face be as the mounted position of bellows, when the staff fixes bellows on the workstation, the staff can be more convenient install bellows on the workstation, and the position of installation aligns more easily.

The utility model discloses further set up to: the depth of the installation step surface is set to be lower than the height of the air outlet holes arranged on the vertical plate, and when the air box is placed on the installation step surface, the working table surface is aligned with the lowest side of the air outlet holes.

Through adopting above-mentioned technical scheme, let the wind energy that the fan blew off via the exhaust vent enough more convenient with table surface contact, can prevent harmful gas leakage more easily.

The utility model discloses further set up to: the air box is also provided with air guide wings which are buckled on the arc-shaped plate, and the air guide wing cover is arranged on the air box.

Through adopting above-mentioned technical scheme, when external air got into the cavity, external gas can follow the surface process of wind-guiding wing, supplyes the air curtain that the exhaust gas formed from bellows for the air curtain is bigger, has better prevention effect to harmful gas.

The utility model discloses further set up to: and the arc-shaped plate is fixedly connected with a plurality of supporting plates for supporting the air guide wings.

Through adopting above-mentioned technical scheme, when establishing the arc cover on bellows, the backup pad supports the wind-guiding wing, can prevent wind-guiding wing and arc direct contact, lets have the clearance between wind-guiding wing and the bellows arc for external gas can be followed and passed between wind-guiding wing and the bellows, and it is indoor more to make things convenient for the outside air to get into the cavity.

The utility model discloses further set up to: an air guide assembly is arranged in the cavity.

Through adopting above-mentioned technical scheme, can be convenient for guide the interior gas of chamber and discharge fast.

The utility model discloses further set up to: the air guide assembly comprises a first sub-plate and a second sub-plate; the first sub-plate and the second sub-plate are sequentially arranged from bottom to top; the first board that divides passes through the reinforcement to be fixed in on the backplate, and has the clearance between first board and the backplate, has the distance between first board and the workstation.

Through adopting above-mentioned technical scheme, the harmful gas that produces in the experiment passes through first minute board and second minute board earlier when discharging, and just first minute board and second minute board can block harmful gas's backward flow, let the staff safer when the experiment.

The utility model discloses further set up to: the reinforcing member is selected to be a screw.

Through adopting above-mentioned technical scheme, the staff is more convenient and fast when installing second subplate and second subplate on the backplate.

To sum up, the utility model discloses a beneficial technological effect does:

1. by arranging the blowing assembly, air blown out by the fan enters the cavity and blows harmful gas in the fume hood, so that airflow balance is formed, and the harmful gas is conveniently discharged;

2. through setting up the air guide subassembly, let the harmful gas in the cavity be convenient for discharge.

Drawings

FIG. 1 is a schematic view of a fume hood according to the present embodiment;

FIG. 2 is a schematic view of the fume hood with the protective door removed in this embodiment;

FIG. 3 is a schematic view of the ventilation cabinet with the protective door lifted;

FIG. 4 is a schematic structural diagram of a fume hood of this embodiment;

fig. 5 is a schematic structural diagram of the blowing assembly in the present embodiment;

FIG. 6 is a schematic view of a windbox in the present embodiment;

in the figure, 1, a workbench; 2. a left side plate; 3. a right side plate; 4. a fan housing; 5. a top plate; 6. a cabinet body; 7. a back panel; 8. a protective door; 9. a chamber; 10. a blowing assembly; 1001. a transverse plate; 1002. a vertical plate; 1003. an arc-shaped plate; 1004. a closing plate; 1005. an air box; 1006. a fan; 1007. an air outlet; 1008. mounting step surfaces; 1009. a wind guide wing; 1010. a support plate; 11. an air guide assembly; 1101. a first sub plate; 1102. a second board; 1103. a reinforcement; 12. a side column; 13. a first clamping plate; 14. a second clamping plate; 15. a glass window.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a laboratory fume chamber, including workstation 1, left side board 2, right side board 3, fan housing 4, roof 5, the cabinet body 6, postnotum 7 and guard gate 8.

Referring to fig. 3, both ends about workstation 1 are installed respectively to left side board 2 and right side board 3, roof 5 is installed between left side board 2 and right side board 3, the left side and the left side board 2 fixed link of roof 5, the right side and the right side board 3 fixed connection of roof 5, guard gate 8 is installed in the front side of roof 5, the fixed backplate 7 that is equipped with in rear side of roof 5, left side board 2, right side board 3, roof 5, workstation 1, guard gate 8 and backplate 7 enclose into a cavity 9, fan housing 4 is fixed on the roof, cabinet 6 fixed mounting is in the bottom of workstation 1.

In order to facilitate the evacuation of the gas inside the chamber 9, a blowing assembly 10 is provided at the edge of the table 1.

With reference to fig. 4 and 5, the blowing assembly 10 includes a bellows 1005 formed by fixedly connecting a horizontal plate 1001, a vertical plate 1002, an arc plate 1003 and a closing plate 1004 (see fig. 6), and the connection between the horizontal plate 1001, the vertical plate 1002, the arc plate 1003 and the closing plate 1004 is welding. The cross plate 1001, the riser 1002 and the arc 1003 are the same length. The transverse plate 1001 and the vertical plate 1002 are vertically and fixedly connected together, the fixed positions are located at the edge positions of the transverse plate 1001 and the vertical plate 1002, the transverse plate 1001 and the vertical plate 1002 are aligned and fixedly connected together along the length direction, and the cross section is L-shaped after the transverse plate 1001 and the vertical plate 1002 are fixedly connected together. The two side edges of the arc plate 1003 are respectively and fixedly connected with the transverse plate 1001 and the vertical plate 1002, and the transverse plate 1001, the vertical plate 1002 and the arc plate 1003 are fixedly connected together to form a quarter-round cylinder. The closing plates 1004 are fixedly connected to both ends of the transverse plate 1001, the vertical plate 1002 and the arc plate 1003, and close a cylinder formed by fixedly connecting the transverse plate 1001, the vertical plate 1002 and the arc plate 1003 together.

A plurality of fans 1006 are installed in the wind box 1005, the fans 1006 are fixedly connected to the transverse plate 1001 at equal intervals along the length direction of the transverse plate 1001, and an air inlet of the fan 1006 penetrates out of the fan 1006, so that the fan 1006 can normally operate when the fan 1006 is started.

Run through on riser 1002 and seted up a plurality of exhaust vents 1007, a plurality of exhaust vents 1007 are arranged along riser 1002 length direction equidistant on riser 1002. The bellows 1005 is fixedly connected to the table 1 at a position close to the outlet of the chamber 9, the bellows 1005 can be fixedly connected to the table 1 by welding or screwing, and the horizontal plate 1001 is in contact with the top surface of the table 1 when the bellows 1005 is fixed to the table 1.

Referring to fig. 4 and 5, when the protection door on the fume hood is opened, the fan is started, and wind in the fan is blown out from the wind box to form a wind curtain at the door opening of the fume hood. In the in-process of blowing out at fan 1006, in the fan blows into the bellows, wind can earlier contact with arc 1003, and arc 1003 leads to wind, lets wind discharge from exhaust vent 1007 department parallel and level on the riser 1002 for in the wind that fan 1006 blew out gets into cavity 9, prevent that harmful gas is reverse to be close door department, also can blow the harmful gas in the fume chamber, blow away harmful gas, make things convenient for harmful gas's removal. Wherein, can set up the subassembly 10 of blowing in the exit position department that is close to cavity 9 on workstation 1, let the wind that fan 1006 blew out have bigger effect scope on workstation 1, prevent that the harmful gas during the experiment from discharging from guard gate 8.

An installation step 1008 for placing a bellows 1005 is arranged on the position, close to the outlet of the cavity 9, of the workbench 1, the bellows 1005 is fixedly connected to the installation step 1008, the horizontal plate 1001 is in contact with the bottom surface of the installation step 1008, and the position, where the fan 1006 is arranged, of the horizontal plate 1001 exceeds the edge of the workbench 1, so that when the bellows 1005 is not fixedly connected to the workbench 1, the bellows 1005 is overlapped on the installation step 1008. And the riser 1002 contacts a surface perpendicular to the bottom surface of the mounting step surface 1008. By providing the installation step 1008, the installation step 1008 serves as an installation position of the bellows 1005, and when a worker fixes the bellows 1005 on the workbench 1, the worker can install the bellows 1005 on the workbench 1 more conveniently, and the installation position is aligned more easily.

The depth of the installation step surface 1008 is set to be lower than the height of the air outlet 1007 arranged on the vertical plate 1002, and when the air box 1005 is placed on the installation step surface 1008, the 1 surface of the workbench is aligned with the lowest side of the air outlet 1007, so that wind blown out by the fan 1006 through the air outlet 1007 can be in surface contact with the 1 surface of the workbench more conveniently, and harmful gas leakage can be prevented more easily.

Referring to fig. 5 and 6, a wind guide wing 1009 is further mounted on the wind box 1005, the wind guide wing 1009 has the same degree of curvature as the arc plate 1003, the wind guide wing 1009 is fastened to the arc plate 1003, the wind guide wing 1009 is covered on the wind box 1005, and the wind guide wing 1009 is fixedly connected to the table 1. Through setting up wind-guiding wing 1009, when external air was in getting into the cavity, external gas can follow the surface process of wind-guiding wing, supplyes the air curtain that the exhaust gas formed in following the bellows for the air curtain is bigger, has better prevention effect to harmful gas. Wherein, there is the clearance between wind-guiding wing and the bellows arc for external gas can pass between wind-guiding wing and the bellows, makes things convenient for the outside air to get into in the cavity more.

In addition, in order to make the connection of the wind guide vanes 1009 on the wind box 1005 firmer, a plurality of support plates 1010 supporting the wind guide vanes 1009 are fixedly connected to the arc plate 1003, and the plurality of support plates 1010 are arranged on the arc plate 1003 at equal intervals along the length direction of the arc plate 1003, and when the arc plate 1003 is covered on the wind box 1005, the support plates 1010 support the wind guide vanes 1009, so that the wind guide vanes 1009 can be prevented from directly contacting the arc plate 1003. By providing the support plate 1010, the air guide wing 1009 is supported, and the air guide wing 1009 is prevented from directly contacting the arc plate 1003.

Referring to fig. 4, in order to facilitate rapid discharge of the gas in the guide chamber 9, an gas guide 11 is provided in the chamber 9, and the gas guide 11 includes a first partition 1101 and a second partition 1102. The air guide 11 is secured to the backplate 7 by a stiffener 1103. The first board 1101 and the second board 1102 are arranged from bottom to top in sequence. The reinforcing members 1103 are selected as screws.

The first board 1101 is fixed to the backplate 7 by three reinforcing members 1103, and a gap exists between the first board 1101 and the backplate 7, and a certain distance exists between the first board 1101 and the workbench 1.

The distance between the second plate 1102 and the backplate 7 is greater than the distance between the first plate 1101 and the backplate 7, the lower end of the second plate 1102 is inclined in a direction away from the backplate 7, and a gap for gas to pass through is formed between the first plate 1101 and the second plate 1102. The upper end of the second section 1102 is provided with a groove, and the second section 1102 is fixed on the back plate 7 by using a reinforcing member 1103 penetrating through the groove.

The upper end of the second section plate 1102 is inclined in a direction away from the back panel 7, the upper end of the second section plate 1102 abuts against the top panel 5, two grooves are formed in the upper end of the second section plate 1102, the second section plate 1102 is fixed to the top panel 5 through the grooves by using the reinforcing members 1103, and a gap also exists between the second section plate 1102 and the top panel 5. The suction end of the suction machine is disposed between the top plate 5 and the second division plate 1102. In this embodiment, the fastening member 1103 is a bolt. Through setting up air guide assembly 11, can enough make things convenient for the harmful gas in the cavity 9 to discharge, also can shelter from the end of bleeding of air extractor, let the end of bleeding of air extractor have good disguise.

Be provided with the light on roof 5, can provide the light source for in the cavity 9, can be more clear see experimental apparatus when letting the staff carry out the experiment.

With reference to fig. 3 and 4, the left side plate 2 and the right side plate 3 are respectively provided with a side upright 12 in the same direction, the side upright is provided with a chute for lifting and descending as a protective door, and when the two side uprights 12 are mounted, the two side uprights 12 block the edge of the protective door 8 to serve as a track for lifting the protective door. An inner cavity is formed in the side upright post 12 along the length direction of the side upright post 12, and two opposite surfaces of the two side upright posts 12 are arc surfaces bent outwards. The contact surface of the two side upright posts 12 and the left side plate 2 or the right side plate 3 is a plane, a first clamping plate 13 and a second clamping plate 14 are arranged on the contact surface of the two side upright posts 12 and the left side plate 2 or the right side plate 3 in a protruding mode, the first clamping plate 13 and the second clamping plate 14 are arranged in parallel, the distance between the first clamping plate 13 and the second clamping plate 14 is the same as the thickness of the left side plate 2 or the right side plate 3, when a worker installs the side upright posts 12 on the left side plate 2 or the right side plate 3, the worker inserts the left side plate 2 or the right side plate 3 between the first clamping plate 13 and the second clamping plate 14 to clamp the left side plate 2 or the right side plate 3, so that the side upright posts 12 can be quickly installed on the left side plate 2 or the right side plate 3, the worker can take the side upright posts 12 out of the left side plate 2 or the right side plate 3 by forcefully pulling, thus when the fume chamber breaks down, the staff can remove the side column 12 fast, and then remove the guard gate 8 fast. The width of the first card 13 is arranged to be greater than the width of the second card 14 and the first card 13 is arranged within the cavity 9. The second card 14 is disposed at an edge of the side post 12 and the first card 13 is disposed at a middle position of the side post 12.

Referring to fig. 2, a glass window 15 is fixedly connected to a position close to the side pillar 12 on the lower side of the top plate 5, the arrangement direction of the glass window 15 is parallel to the arrangement direction of the protective door 8, and the protective door 8 is disposed on the outer side of the glass window 15.

The implementation principle of the embodiment is as follows: when the staff is experimenting in carrying out the fume chamber, open fan 1006, blow in the cavity 9 of fume chamber, let the air current in the cavity 9 keep flowing to the direction of fan housing 4, the harmful gas who produces when preventing to experiment reveals from the exit of cavity 9.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A laboratory ventilation cabinet comprises a workbench (1), a left side plate (2), a right side plate (3), a fan cover (4), a top plate (5), a cabinet body (6), a back plate (7) and a protective door (8);

the method is characterized in that: the edge of the workbench (1) is also provided with a blowing assembly (10) for preventing air in the cavity (9) from escaping from the table top of the workbench (1); the blowing assembly (10) comprises a wind box (1005), a plurality of fans (1006) installed in the wind box (1005) and a plurality of air outlet holes (1007) formed in the wind box (1005); the air box (1005) is fixedly connected to the workbench (1);

when the air box (1005) is mounted on the workbench (1), the air outlet hole (1007) faces the inside of the chamber (9).

2. The laboratory fumehood of claim 1 wherein: the bellows (1005) comprises a transverse plate (1001), a vertical plate (1002), an arc plate (1003) and a closing plate (1004), and the transverse plate (1001), the vertical plate (1002), the arc plate (1003) and the closing plate (1004) are fixedly connected; the air outlet holes (1007) are arranged on the vertical plate (1002), and the fans (1006) are fixedly connected to the horizontal plate (1001).

3. The laboratory fumehood of claim 2 wherein: the edge of the workbench (1) is provided with an installation step surface (1008) for placing an air box (1005), and the air box (1005) is fixedly connected to the installation step surface (1008).

4. A laboratory fume hood according to claim 3 wherein: the depth of the installation step surface (1008) is set to be lower than the height of the air outlet hole (1007) arranged on the vertical plate (1002), and when the air box (1005) is placed on the installation step surface (1008), the surface of the workbench (1) is aligned with the lowest side of the air outlet hole (1007).

5. The laboratory fumehood of claim 2 wherein: and the air box (1005) is also provided with an air guide wing (1009), the air guide wing (1009) is buckled on the arc-shaped plate (1003), and the air guide wing (1009) is covered on the air box (1005).

6. The laboratory fumehood of claim 4 wherein: the arc-shaped plate (1003) is fixedly connected with a plurality of supporting plates (1010) for supporting the air guide wings (1009).

7. The laboratory fumehood of claim 1 wherein: an air guide assembly (11) is arranged in the cavity (9).

8. The laboratory fumehood of claim 7 wherein: the air guide assembly (11) comprises a first sub-plate (1101) and a second sub-plate (1102);

the first sub-plate (1101) and the second sub-plate (1102) are sequentially arranged from bottom to top; the first sub-board (1101) is fixed on the rear backboard (7) through a reinforcing member (1103), a gap exists between the first sub-board (1101) and the rear backboard (7), and a distance exists between the first sub-board (1101) and the workbench (1).

9. The laboratory fumehood of claim 8 wherein: the reinforcing member (1103) is selected to be a screw.