CN2221146Y - Explosion-proof electric torch - Google Patents

Abstract

The utility model relates to an explosion-proof electric torch. A battery bin is arranged in an outer shell of the electric torch. A bulb, a light focusing bowl and a transparent window are arranged on the front part of the electric torch. The utility model is characterized in that the connection of the parts of the outer shell of the electric torch is explosion-proof connection, and the connection of the outer shell and the transparent window is also the explosion-proof connection. Simultaneously, a switch is an explosion-proof switch, such as a rotary switch which is arranged in the head of the electric torch. The utility model has the advantages of simplicity, general use, low cost, etc. of a common electric torch, and is suitable for night patrol or emergent examination and repair in places where combustible gas, combustible liquid or combustible dust exists.

Description

Explosion-proof flashlight

The utility model belongs to the lighting device that prevents electric spark, relates to a kind of explosion-proof flashlight that uses in inflammable, explosive atmosphere.

Be filled with the workplace of inflammable and explosive medium at oil plant etc., lighting apparatus must have explosion prevention function.Existing this kind equipment mostly is isolated plant, and versatility is less, and cost is higher.And flashlight used in everyday (has battery compartment in the torch shell, anode connects a utmost point of bulb tail end, switch and the negative pole of GND on bonnet, shell is communicated with another utmost point that sheet connects bulb, the torch front portion is provided with convergent bowl and transparency window), electrical connection place at switch, bonnet and bulb, all may produce electric spark, in the environment that contains imflammable gas, liquid or dust, use this flashlight, often cause serious explosion accident.Also do not have a kind of easyly, general at present, can adapt to the illumination needs of various different occasions, the flashlight of explosion-proof ability is arranged again.

In order to overcome these defectives of traditional flashlight, the application's task provides a kind of flashlight with explosion prevention function, it should have advantages such as general flashlight is easy, general, with low cost, can satisfy simultaneously the constituent parts of productions, transportation or use inflammable substance, explosive materials concealed again, and other there is the safety requirements of explosion-proof index department.

The scheme of finishing above-mentioned task is as follows: same as the prior art, in the torch shell, battery compartment is arranged, and bulb, convergent bowl and transparency window are equipped with in the torch front portion.Different is: the connection of connection, shell and transparency window between the torch shell each several part, be explosion-proof connection, and switch is a flame-proof switch simultaneously.Said " explosion-proof connection " is meant and adopts in a series of explosion-proof criterias that State Standard Bureau publishes one of connecting structure of institute's concrete regulation at least.For example: make spiral marking connection with the precision more than the secondary, the number of turns of screw thread is no less than 6 circles simultaneously; Perhaps close-fitting socket, socket place are flame proof faying face (lap be not less than diameter 10%), or the like.Said flame-proof switch is meant between the space outerpace of switch contact point and torch, does not have the slit of non-blast resistance construction.For example: switch is made the rotary switch described in the application's the embodiment 1,2 or 3; Or, make the flame proof faying face that meets requirement of explosion proof with the slipper of traditional torch switch.In order further to increase the anti-explosion safety performance, the application also can further take following technical measures: transparency window adopts the resisting strong impact material, and for example the centre of Merlon, two-layer optical glass is the implosion guard of lucite interlayer or the composites such as transparent plastic that glass fibre strengthens; The operating temperature control of bulb is (for example below 80 °) within limits; Battery in the torch adopts the battery (seeing " intrinsic safety electric source " in the national explosion-proof criteria) that meets the essential safety power requirement.

The explosion-proof flashlight that the application provided has advantages such as general flashlight is easy, general, with low cost, and use in the place that be fit to that again fuel gas is arranged simultaneously, liquid or combustible dust exists.It can reach the anti-explosion safety requirement of civilian or defense sector such as oil, chemical industry, natural gas, coal gas, electronics, metallurgy, boats and ships, uses when being particularly suitable for ground night patrol such as oil depot, air accumulator, liquefied gas station, hydrogen station or emergent maintenance.

Now be described further in conjunction with the accompanying drawings and embodiments.

Fig. 1 is embodiment 1 structural representation;

Fig. 2 is embodiment 3 part-structure schematic diagrames.

Embodiment 1, and with reference to Fig. 1: torch shell (12) is with [F2] rustproof aluminum alloy that does not contain magnesium, the explosion separation structure cylinder of making.Its outer surface is an oxidation insulating layer, and inside is battery compartment, and battery (17) is housed, and dress should meet the intrinsic safety electric source requirement with voltage, the electric current of battery.With explosion-proof spiral marking connection, sealing rubber ring (20) is housed simultaneously between shell and the bonnet (21).Stage clip on the bonnet (18) is communicated with GND with shell.Explosion-proof criteria rank nameplate (19) is equipped with in the bonnet outside.Do not establish switch in the torch outside.The front end of torch shell is the torch head (2) that same material is made, and connects with explosion-proof spiral between the two, and rubber seal (7) is housed.Polycarbonate transparent window (1) is housed, between the two with the socket of flame proof faying face on the torch head.After the socket, utilize the ductility of metal that the leading edge of torch head is inwardly compressed into a circle, with fixing transparency window and increase explosion-proof ability.Convergent bowl (5) is housed in the transparency window.Plastics trim ring (3) is fixed on convergent bowl in the torch head.Also be provided with rubber seal (4) between convergent bowl and the torch head.In shell front end (part in the torch head), anodal fore-set (11) and bulb top spring (10) are installed, insulate between the two and the torch shell, be to insulate in the present embodiment with plastic inner lining cover (14).Anode is connected by the tail end (positive pole) of anodal fore-set and bulb top spring and bulb (16).The negative pole that the shell front end also is provided with a conduction is communicated with sheet (13), and this connection sheet one end closely contacts with the torch shell, is pressed with a switch stage clip (8) on the other end, places the lamp holder sleeve pipe (9) of metal in the middle of the switch stage clip.Bulb (16) is laid in the centre of sleeve pipe, and present embodiment adopts no screw-socket bulb, so press female (15) that bulb is fixed with bulb.There is the small projection (promptly can be considered the I molded cannula of a hollow) of a circle front portion of lamp holder sleeve pipe (9) outer wall.Be enclosed within its outside switch stage clip (8), do not contact, but spring then contacts with the projection of this sleeve pipe when not being compressed with the outer wall of this sleeve pipe.GND is communicated with sheet (13), switch stage clip (8) and lamp holder sleeve pipe (9) through torch shell (12), negative pole, connects the copper shell (negative pole) of bulb (16), forms the loop, and torch is lighted.Between convergent bowl (5) and switch stage clip (8), a switch cover (6) is installed, this compressing tablet is the disk (making also available hard rubber sheet in this example with ABS plastic) of an insulation, perforate in the middle of it is sleeved on the outside of lamp holder sleeve pipe (9).When screwing the torch head, move behind the convergent bowl, move behind the drive switch cover, the switch stage clip is compressed, the projection circle of switch stage clip and lamp holder sleeve pipe is broken away from, circuit disconnects, and torch is closed.Unscrew the torch head, then the switch stage clip contacts again with the lamp holder sleeve pipe, and circuit is connected, and can open flashlight.On the outer wall of shell and torch head, by explosion-proof regulation, explosion-proof nameplate (22) is housed respectively and warns nameplate (23), above the instructions for use of writing book torch, to guarantee safety.Present embodiment has been because of having adopted hermetically sealed blast resistance construction, and designed explosion-proof rotary switch, so can reach higher explosive-proof grade, water-proof function arranged simultaneously.

Embodiment 2: basic structure is identical with last example, but shell and torch head are made with duroplasts.Be provided with a negative pole in the enclosure and be communicated with sheet, connect the battery spring on the bonnet, with the rotary switch of shell front end, to connect circuit.Rotary switch is identical with last example.

Embodiment 3, and another kind of rotary switch design: torch shell and torch head are made with duroplasts, and basic structure is identical with traditional flashlight, but all junctions of each parts are explosion-proof faying face or explosion-proof spiral, do not establish traditional switch simultaneously.Anode directly connects bulb tail end (positive pole); Negative pole is communicated with sheet battery spring on the bonnet and bulb screw mouth is connected.The structure of its rotary switch is with reference to Fig. 2: on the inwall of torch shell (12) tail end, be provided with a slice or one group of (2-4) battery stationary spring (24), with self-contained battery (17).Bonnet (21) is when screwing, and battery spring (18) compresses with GND, and circuit is connected, and torch is lighted; When bonnet slightly unscrewed, battery spring and GND broke away from, and torch extinguishes.

Embodiment 4: torch shell and torch head are formed from aluminium, and basic structure is identical with traditional flashlight, simultaneously bonnet and stack shell are made an integral body, and battery is packed into from the shell front portion.The all junctions of each parts are explosion-proof faying face or explosion-proof spiral, simultaneously the slipper of conventional switch is also made blast resistance construction: the faying face between switch push-pull button and the torch shell is best bright finish surface (minute surface), and each bar hem width degree of this faying face all is no less than 5mm simultaneously.

Claims (6)

1, explosion-proof flashlight has battery compartment in the torch shell, bulb, convergent bowl and transparency window are equipped with in the torch front portion, it is characterized in that: the connection of connection, shell and transparency window between the torch shell each several part, be explosion-proof connection, and switch is a flame-proof switch simultaneously.

2, according to the described explosion-proof flashlight of claim 1, it is characterized in that: said flame-proof switch is a rotary switch.

3, according to the described explosion-proof flashlight of claim 2, it is characterized in that, the structure of said rotary switch is: at the shell front end, anodal fore-set and bulb top spring are housed, insulate between the two and the torch shell, anode is connected by the positive pole of anodal fore-set and bulb top spring and bulb, the negative pole that the shell front end also is provided with a conduction is communicated with sheet, this connection sheet one end closely contacts with the torch shell, is pressed with a switch stage clip on the other end, places the metallic lamp holder sleeve pipe in the middle of the switch stage clip, lay bulb in the middle of the sleeve pipe, the outer wall of sleeve pipe has a circle projection, and GND is through the torch shell, negative pole is communicated with sheet, switch stage clip and lamp holder sleeve pipe connect the bulb negative pole, between convergent bowl and switch stage clip, a switch cover is installed, and perforate in the middle of it is sleeved on the outside of lamp holder sleeve pipe.

4, according to claim 1 or 2 or 3 described explosion-proof flashlights, it is characterized in that: said explosion-proof connection is to make spiral marking connection with the precision more than the secondary, and the number of turns of screw thread is no less than 6 circles simultaneously, perhaps close-fitting socket, and socket place is explosion-proof faying face.

5, according to claim 1 or 2 or 3 described explosion-proof flashlights, it is characterized in that: transparency window adopts the resisting strong impact material.

6, according to the described explosion-proof flashlight of claim 4, it is characterized in that: transparency window adopts the resisting strong impact material.

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