CN2087892U

CN2087892U - Air-screen dust-proof safety hat

Info

Publication number: CN2087892U
Application number: CN 90215570
Authority: CN
Inventors: 朱育元; 周勤业
Original assignee: Xi'an Heavy Machinery Research Institute Ministry Of Mechanical And Electronic Industry; Baoshan Iron and Steel Co Ltd
Current assignee: Xi'an Heavy Machinery Research Institute Ministry Of Mechanical And Electronic Industry; Baoshan Iron and Steel Co Ltd
Priority date: 1990-12-20
Filing date: 1990-12-20
Publication date: 1991-11-06

Abstract

The utility model discloses a dust-proof safety hat used in the working environment with higher dust content. The dust-proof safety hat is a hollow structure. After the airflow provided by an air source enters the dust-proof safety hat, the front of the head of the operator forms a blast air curtain with a certain of flow speed to prevent the dust from invading the human body. When the operator is in the working environment with bigger dust particle and a certain of flow speed, so long as the speed of the air curtain is enhanced through a pressure regulating valve, and the granule dust can be blocked. One side of the dust-proof hat is provided with a respirator. So long as the airflow enters the dust-proof hat, and a blast clean airflow passes the respirator to satisfy the breathing requirement of the operator.

Description

Air-screen dust-proof safety hat

The utility model relates to the band air-screen type that a kind of labour protection uses and is used for the dustproof safety cap.

In enterprises such as metallurgy, mine and machineries; safeguard protection for operating personnel; the general operating personnel that all require to enter the workplace; must put on the safety cap that hard material is made in accordance with regulations; its material has rattan system, light-alloy or various plastic; this is for when running into hard thing bump, does not cause operating personnel's head to sustain damage.If higher Dust Capacity (these dust comprise: sand dust, coal dust etc.) is contained in the workplace, and the dedusting condition of workplace is not very under the ideal situation, and so, relatively Shi Yi measure is the safety cap with the band dust prevention.

In some present Dust-proof safety helmets, citation form is to adopt a special helmet, operating personnel's head is covered within the special helmet fully, and with isolated dust, and, for operating personnel's besoin de respirer.Oral area operating personnel adds a screen pack, perhaps feeds fresh air in the helmet.This helmet can play certain dustproof effect, but, because complex structure, the weight of the helmet are bigger, therefore, make operating personnel's head uncomfortable easily, rotate not nimble, and when the workplace temperature drift, weather is during than the fierce work of heat or operating personnel, this helmet can't distribute operating personnel's heat on the face, and sweat drips also can't wiping.Therefore, the dust cap of this helmet-type can not adhere to using, and can not promote.

The utility model is based on common safety cap commonly used for the head of exempting operating personnel covers on discomfort in the special helmet fully, will be improved on its structure, and subsidiary dustproof measure and making, see Fig. 2.This dust cap is made up of shell 5 and inner casing 6, space between two layers of shell is 2～4mm, this gap by attach on inner casing 6, front and back longitudinally deflector guarantee, deflector can be established 3～7, part 7 is the crown portion that is used for being worn over operating personnel for the canvas guipure, there is air inlet pipe interface 8 at the cap rear portion, it by the interface cast welding on shell.When the air communication of being come by source of the gas is crossed the air inlet pipe interface and is entered between the inside and outside shell space, because the influence of deflector, make air-flow flow to the air cleft (see figure 2) of dust cap front end equably, for being concentrated, air-flow flows to the dust cap front end, therefore, except that the front end air cleft was sentenced, the lower end of the left side of dust cap, rear side and right part (being inside and outside shell intersection) must all shut.Gap between the inside and outside shell in front end air cleft place is 1～2mm, and, it between the direction in space, air cleft place and the vertical line of dust cap 10～15 ° angle, make air-flow form one deck oblique (for people's face) and the higher air curtain (see figure 3) of speed slightly outward, speed can reach 0.5～15m/sec, when the dust granularity is big,, just can achieve the goal as long as the flow velocity of air curtain is heightened.

Because air curtain has certain flow velocity, can not only stop that dust enters operating personnel's respiratory tract, and, the heat of operating personnel's head can also be taken away, make operating personnel that cooling feeling be arranged.But, because making, the flow velocity of air curtain causes a negative pressure between air curtain and the operating personnel face, will cause operating personnel's expiratory dyspnea.In order to address this problem, the utility model (is seen the part 9～part 13 among Fig. 2 what a side of dust cap was equipped with a cover band micro-regulating valve for respirator, part 18～part 21 among Fig. 3, part 26～part 30 among Fig. 4), side at the dust cap inner casing has one to connect the gas port (see figure 4), this connects gas port and inner casing is an one, it has internal thread, important document 26 hollow bolts are with the steel of rubber blanket spare 27 with pipe end or copper be connected and connect on the gas port for breathing pipe fitting 29, the air-flow that then enters interlayer can pass through this respiratory siphon with some, flow out by another pipe end of giving vent to anger, another pipe end of giving vent to anger is to process length 20～50mm one for place, respiratory siphon end, the slit of width 2～5mm (Fig. 4), during this slit of air-flow process, in order after buffering, to supply with the required fresh air of operating personnel equably, part 30 sponges covers are housed at the port of export for respiratory siphon.And, in order to regulate the air-flow size of supplying with for breathing, be equipped with micro-regulating valve spare 28 at middle part for respiratory siphon.In addition, for this cover does not influence the operation that operating personnel put on, unloaded dust cap for respirator, it is to be that axis rotates around the center of part 26 hollow nuts, when can up pushing away when not required, can will move operating personnel's bottom, nostril (see figure 3) to for respirator when needing.

The source of the gas supply of dust cap can be adopted the original compressed air line in workplace or adorn blower fan in addition.But, for the pure air of suitable pressure is provided to operating personnel, must consider that in pipeline (before promptly entering dust cap) is equipped with corresponding oil water separator and pressure regulator valve (see figure 1) oil water separator can be located near the source of the gas position, and the pressure regulator valve band is on one's body operating personnel, like this, the pressure regulator valve of operating personnel by carrying according to the situation of workplace dust, can be regulated the flow velocity of air curtain at any time.Shown in Figure 1, when being used for occasions such as mine, in pipe-line system, can also connect instruments such as pneumatic pick, pneumatic shovel.

The utility model dust cap can be made by plastics or alloy in lightweight.

Accompanying drawing of the present utility model is as follows:

Fig. 1 dust cap and source of the gas pipeline schematic diagram

1 dust cap, 2 total air flow pressure regulator valve 3 pneumatic picks, 4 air compressor machines or blower fans

Fig. 2 dust cap structure chart

5 shells, 6 inner casings, 7 woven belt nets, 8 air inlet pipe interfaces, 9 hollow nuts

10 rubber blankets, 11 micro-regulating valves 12 are for respiratory siphon 13 sponges covers

Fig. 3 dust cap air curtain and confession respirator figure

14 shells, 15 inner casings, 16 woven belt nets, 17 air inlet pipe interfaces, 18 hollow nuts

19 rubber blankets, 20 micro-regulating valves 21 are for respiratory siphon 22 sponges covers

Fig. 4 is for respiratory organ structure figure

23 shells, 24 inner casings, 25 woven belt nets, 26 hollow nuts, 27 rubber blankets

28 micro-regulating valves 29 are for respiratory siphon 30 sponges covers

Embodiment:

Make the working cap that the centre of being made up of inside and outside shell has the 2.5mm space with plastics (or alloy in lightweight), behind the air-flow process oil water separator and pressure regulator valve input service cap by source of the gas, air-flow promptly can prolong deflector, air cleft place by the working cap front end, form one air curtain with certain flow rate laterally, this layer air curtain will completely cut off the brain that dust enters operating personnel.And, operating personnel can be by being installed in the respirator that supplies on the branch air-flow interface on the working cap one side inner casing, regulate for the miniature pressure regulator valve on the respirator pipeline, supply operating personnel essential fresh air continuously, in the more place of dust, a local dustproof working environment can be arranged with the handled easily personnel.

Claims

1, a kind of band air-screen type is used for the dustproof safety cap, it is characterized in that, it is the safety cap with plastics or alloy in lightweight system, constitute by shell and inner casing, leave suitable space between the inside and outside shell and (should be 2～4mm), the size in this layer space guarantees that by 3～7 deflectors on the inner casing, that pass through front and back the lower edge major part of inside and outside shell seals, and only leaves the air cleft of 1～2mm at the anterior lower edge of safety cap.

2, Dust-proof safety helmet according to claim 1, its further technical characterictic are that the air cleft gap of the anterior lower edge of Dust-proof safety helmet and human body vertical line form 10～15 a ° outward-dipping angle.

3, Dust-proof safety helmet according to claim 1, its further technical characterictic is on the inner casing of Dust-proof safety helmet one side a branch air-flow interface is arranged, for respiratory siphon (its material is a steel or copper) by the hollow hex bolts in addition rubber blanket connect and be anchored on the branch air-flow interface, after air-flow enters Dust-proof safety helmet, part is entered for respiratory siphon by the hollow of minute air-flow interface by bolt, then, can be used for operating personnel's breathing by the flat seam opening part of the other end that supplies respiratory siphon, and, be equipped with a sponges cover in flat seam opening periphery.

4, according to claim 1 and 3 described Dust-proof safety helmets, its further technical characterictic is to be provided with a miniature pressure regulator valve for the centre of respiratory siphon, and a whole set of can centering on for respirator divides the axis of air-flow interface (being hollow bolt) rotate slightly.

5, Dust-proof safety helmet according to claim 1, its further technical characterictic are that the source of the gas that provides can or set up blower fan by compressed air line, but must pass through and the corresponding oil water separator of source of the gas; And, must pass through pressure regulator valve, to regulate the pressure of air inlet.