Field of the Invention
[0001] The present invention belongs to the technical field of gas fire suppression, and
relates to a bidirectional jet flame igniter, especially a bidirectional jet flame
igniter for aerosol fire suppression apparatus.
Background of the Invention
[0002] In aerosol fire suppression apparatuses, the design and reliability of flame igniter
is of crucial importance to the functionality of the entire apparatus, wherein the
species and amount of the chemical agent in an ignition pack, air tightness, water
resistance, shock resistance, assembly of primary explosive, explosive molding process,
and ignition performance must be considered, and vibration of the chemical agent in
the ignition pack must be prevented. Especially, for an apparatus that jets aerosol
in both directions, synchronization of ignition in both directions must be considered.
[0003] In the prior art, a bidirectional piezoelectric flame igniter is disclosed in Patent
Application No.
JP56165832(A), and the flame igniter is designed to decrease the failure rate of electric flame
igniter in fire suppression apparatus; the structural characteristics of the piezoelectric
flame igniter are: A cam with two control parts and a control lever are arranged in
the piezoelectric flame igniter, so that the ignition hammer is driven twice in a
single ignition operation to discharge and ignite twice. However, such a flame igniter
only decreases the failure rate of ignition partially but doesn't solve safety and
synchronization problems, and the structure is bulky and complex. At present, in bidirectional
horizontal jet aerosol fire suppression apparatuses available in the domestic market,
the ignition element still employs an ignition pack bound up with a transparent tape,
with the ignition chemical agent sealed in a zip-lock bag. There are many defects
related with ignition with such an ignition pack, for example, the loading of chemical
agent in the ignition pack is not quantified, the air-tightness of the ignition pack
is not satisfactory, the zip-lock bag may fail easily in hot test, the initiation
of ignition is not synchronous, and the ignition effect is poor, etc. Moreover, in
the transportation process, the ignition pack may displace from the central position
or break up due to vibrations, and therefore can't initiate the apparatus successfully.
As a result, the apparatus can't be used to suppress fire timely. In the 37 patent
documents obtained by literature searching, the flame igniters are mainly used for
safety gas bags (e.g.,
CN86203126,
CN200520011152.8,
8610332,
200610022391.2) or rocket engines (e.g.,
CN03218960.5;
200320103882.1,
200620147019.X), etc., and the ignition is implemented by means of hot lithium electric ignition
(
CN96236373.1) or shock-wave ignition (
CN00261694.7), etc.; all of these documents don't involve the chemical agent and structural design
of flame igniters for aerosol fire suppression apparatuses.
Summary of the Invention
[0004] In view of the present situation in the prior art, the object of the present invention
is to provide a bidirectional jet flame igniter for aerosol fire suppression apparatus
that is simple in structure, safe and reliable, and easy to operate, to overcome the
technical drawbacks of existing flame igniters for aerosol fire suppression apparatuses,
such as unsatisfactory air-tightness and failure in hot test, etc.
[0005] The technical solution of the present invention will be described as following:
A bidirectional jet flame igniter for aerosol fire suppression apparatus, comprising
igniter bracket and igniter cup, wherein the igniter cup is fixed to the igniter bracket,
and has ignition chemical agent and ignition head therein; the ignition head is fixed
at the center of the ignition chemical agent, and is connected with ignition head
lead wire.
[0006] Furthermore, a tubular rivet is fixed at one end of the igniter cup and the ignition
head lead wire is fixed in relation to the tubular rivet.
[0007] Furthermore, a connecting piece is installed outside of the igniter cup and the ignition
head lead wire is fixed in relation to the connecting piece.
[0008] Furthermore, the wall of the igniter cup has external threads for screwing with the
connecting piece and the connecting piece is screwed together with the igniter cup.
[0009] Furthermore, the igniter cup has a volume of 4 cm
3∼10 cm
3.
[0010] Furthermore, the ignition heads comprise two ignition heads connected in shunt and
the shunt resistance of the two ignition heads is within the range of 1.2 Ω∼1.8 Ω.
[0011] Furthermore, an igniter cap is fixed to the port on one end of the igniter cup and
flame jets are arranged on the igniter cup and igniter cap.
[0012] Furthermore, 1∼100 flame jets are arranged on the igniter cup and igniter cap and
the flame jets have a diameter of Φ 0.1 mm∼Φ 20 mm.
[0013] Furthermore, 5∼30 flame jets are arranged on the igniter cup and the flame jets have
a diameter of Φ 1 mm∼Φ 5 mm.
[0014] Compared to that in the prior art, the flame igniter in the present invention has
satisfactory air-tightness and moisture-proof performance and can effectively protect
the ignition chemical agent therein against vibrations; in addition, the flame igniter
achieves synchronous bidirectional ignition.
Brief Description of the Drawings
[0015] Bidirectional jet flame igniter for aerosol fire suppression apparatus in the present
invention will be further detailed with reference to the drawings, to make the fore-mentioned
advantages of the present invention be understood more clearly.
Figure 1 is a schematic structural diagram of an example of the bidirectional jet
flame igniter for aerosol fire suppression apparatus in the present invention;
Figure 2 is a schematic structural diagram of another example of the bidirectional
jet flame igniter for aerosol fire suppression apparatus in the present invention.
Detailed Description of the Embodiments
[0016] The present invention will be further detailed with reference to the drawings.
[0017] Figure 1 is a schematic structural diagram of an example of the bidirectional jet
flame igniter for aerosol fire suppression apparatus in the present invention. As
shown in Figure 1, the bidirectional jet flame igniter for aerosol fire suppression
apparatus comprises igniter bracket 5 and igniter cup 6 fixed to the igniter bracket
5, wherein the igniter cup 6 is made of a metal material, such as copper. A specific
amount of ignition chemical agent 3 is filled in the igniter cup 6, and an ignition
head 4 is installed at the center of the ignition chemical agent 3; the ignition head
4 has specific resistance; in this example, the ignition head comprises two ignition
heads connected in shunt, with 1.2 Ω shunt resistance. A tubular rivet 2 is fixed
at the top center of the igniter cup 6, parallel ignition head lead wires 1 pass through
the tubular rivet 2 and are connected to the ignition head 4; the ignition head lead
wires 1 are fixed in relation to the tubular rivet 2. In this example, the distance
from the ignition head 4 to the tubular rivet 2 is 16 mm, the ignition head lead wires
1 are fixed to the tubular rivet 2 with AB adhesive, and the tubular rivet 2 is bonded
to the cup 6 with AB adhesive.
[0018] Furthermore, 30 flame jets in Φ 1 mm diameter are arranged on the side wall of igniter
cup 6 and an igniter cap 7, and the igniter cup 6 are coupled to the igniter cap 7
by means of mold closing.
[0019] In case of fire in the protective area, the control element of the aerosol fire suppression
apparatus detects the fire signal, and the annunciator alarms automatically and switch
on the power supply quickly; thus the ignition head 4 ignites the ignition chemical
agent 3, and the flame spurt out of the flame jets on the igniter cup 6 from the limited
space in the igniter cup 6 at high speed under gas pressure, creates a narrow and
long flame in jet length more than 30 cm, and ignite the aerosol generating chemical
agent in the bidirectional horizontal jet aerosol fire suppression apparatus, and
thereby initiates the fire suppression apparatus.
[0020] Figure 2 is a schematic structural diagram of another example of the bidirectional
jet flame igniter for aerosol fire suppression apparatus in the present invention.
As shown in Figure 2, the bidirectional jet flame igniter for aerosol fire suppression
apparatus comprises igniter bracket 5 and igniter cup 6, wherein the igniter cup 6
has external threads on its wall for screwing with a connecting piece 9, the connecting
pieced 9 is screwed together with the igniter cup 6, and ignition head lead wire 1
is fixed in relation to the connecting piece 9.
[0021] The igniter cup 6 can be made of a metal material, such as stainless steel. A specific
amount of ignition chemical agent 3 is filled in the igniter cup 6, and an ignition
head 4 is installed at the center of the ignition chemical agent 3; the ignition head
4 has specific resistance; in this example, the ignition head comprises two ignition
heads connected in shunt, with 1.8 Ω shunt resistance.
[0022] In addition, 30 flame jets in Φ 1 mm diameter are arranged on the top of the igniter
cup 6, and the port of the igniter cup 6 is sealed with a sealing tin foil plate for
moisture-proofing.
[0023] In case of fire in the protective area, the control element of the aerosol fire suppression
apparatus detects the fire signal, and the annunciator alarms automatically and switch
on the power supply quickly; thus the ignition head 4 ignites the ignition chemical
agent 3, and the flame breaks through the tin foil plates on the two ends of the flame
igniter and spurt out from the limited space in the igniter cup 6 under gas pressure,
and ignites the aerosol generating chemical agent in the two ends of the bidirectional
horizontal jet aerosol fire suppression apparatus synchronously, and thereby initiates
the fire suppression apparatus.
[0024] Furthermore, the cup of the bidirectional jet flame igniter for aerosol fire suppression
apparatus in the present invention has a volume of 4 cm
3∼10 cm
3.
[0025] On the basis of the above instruction for the present invention, those skilled in
the art can easily make modifications or variations to the embodiments without departing
from the spirit of the present invention; however, all these modifications or variations
shall be deemed as falling into the protective scope of the present invention. Those
skilled in the art shall appreciate that the above description is only provided to
elaborate and explain the object of the present invention, instead of constituting
any confinement to the present invention. The protective scope of the present invention
shall only be confined by the claims and their equivalence.
1. A bidirectional jet flame igniter for aerosol fire suppression apparatus, comprising
igniter bracket (5) and igniter cup (6), wherein the igniter cup (6) is fixed in relation
to the igniter bracket (5), and has ignition chemical agent (3) and ignition head
(4) therein; the ignition head (4) is fixed at the center of the ignition chemical
agent (3), and is connected with ignition head lead wire (1).
2. The bidirectional jet flame igniter for aerosol fire suppression apparatus according
to claim 1, characterized in that a tubular rivet (2) is fixed to one end of the igniter cup (6) and the ignition head
lead wire (1) is fixed in relation to the tubular rivet (2).
3. The bidirectional jet flame igniter for aerosol fire suppression apparatus according
to claim 1, characterized in that a connecting piece (9) is arranged outside of the igniter cup (6) and the ignition
head lead wire (1) is fixed in relation to the connecting piece (9).
4. The bidirectional jet flame igniter for aerosol fire suppression apparatus according
to claim 3, characterized in that the igniter cup (6) has external threads for screwing with the connecting piece (9)
and the connecting piece (9) is screwed together with the igniter cup (6).
5. The bidirectional jet flame igniter for aerosol fire suppression apparatus according
to claim 1, characterized in that the igniter cup (6) has a volume of 4 cm3∼10 cm3.
6. The bidirectional jet flame igniter for aerosol fire suppression apparatus according
to claim 1, characterized in that the ignition head (4) comprises two ignition heads connected in shunt and the shunt
resistance of the two ignition heads (4) is within the range of 1.2 Ω∼1.8 Ω.
7. The bidirectional jet flame igniter for aerosol fire suppression apparatus according
to claim 1, characterized in that an igniter cap (7) is fixed to the port at one end of the igniter cup (6) and flame
jets (8) are arranged on the igniter cup (6) and igniter cap (7).
8. The bidirectional jet flame igniter for aerosol fire suppression apparatus according
to claim 7, characterized in that 1∼100 flame jets are arranged on the igniter cup (6) and igniter cap (7) and the
flame jets have a diameter of Φ 0.1 mm ∼ Φ 20 mm.
9. The bidirectional jet flame igniter for aerosol fire suppression apparatus according
to claim 1, characterized in that 5∼30 flame jets are arranged on the igniter cup (6) and the flame jets have a diameter
of Φ 1 mm∼Φ 5 mm.