CN205746967U - A kind of compression-ignited firing device - Google Patents

Abstract

This utility model belongs to the firing device technical field in terms of Machine Design, particularly to a kind of compression-ignited firing device.This utility model includes cylinder and piston；Piston is inserted in the inner chamber body of cylinder, and cylinder body bottom connects has base, base to be provided with groove, is provided with the cavity volume that can accommodate combustibles in this groove.This utility model utilizes Fast Compression air can make the compression-ignition principle that its temperature drastically raises, and lights the combustibles such as Linesless charcoal that open air is easily obtained, paper scrap, cotton, fluffy grass as kindling material, it is achieved function of igniting.This utility model is simple and practical, it is adaptable to the detailed design of compression-ignited firing device, and practicality is stronger.

Description

A kind of compression-ignited firing device

Technical field

This utility model belongs to the firing device technical field in terms of Machine Design, particularly to a kind of compression-ignited dress of igniting Put.

Background technology

Human lives be unable to do without fire, creates numerous method and apparatus around the problem of igniting, as on April 24th, 2013 is public Publication No. disclosed in the patent of invention " gas lighter " of Publication No. 103062791A opened and JIUYUE in 2014 17 days The patent of invention " electric-arc lighter " etc. of 104048317A.Although above-mentioned published method and apparatus of igniting is convenient, practical, but There is the problem needing to consume the auxiliary fire-lighters such as flint, battery, gasoline, liquefied gas, if above-mentioned auxiliary fire-lighter exhausts, the most not Can ignite again.In normal circumstances, owing to the firing devices such as lighter are prone to buy, supplement, this problem does not highlight；If but in When tourism, exploration, face this problem at desolate and uninhabited place, be then difficult to overcome.

To this end, Publication No. CN104566453A disclosed in 29 days April in 2015, Application No. 201410710846.4 Application for a patent for invention " a kind of lighter for field survivorship " discloses a kind of without expendable assisting beating of fire-lighter Lighter.This patent application, closed by two one end, caliber small one and large one, the pvc pipe that is nested together, compress Large Diameter Pipeline pvc pipe Interior air so that it is temperature raises, and ignite combustibles.It is in as it is shown in figure 1, Fig. 1 is prior art construction schematic diagram, i.e. piston Just start compression and close the position view of chamber air.

Although this patent application have simple in construction, without can expendable auxiliary fire-lighter advantage.But the public affairs of this application Open file illustrate only basic ideas and structure, it is not specified that the design of this kind of firing device, computational methods, is not easy to this area Technical staff carries out the detailed design work of product.This application there is also problems with simultaneously:

1) combustibles being positioned over pipe with small pipe diameter pvc pipe end easily come off；

2) pipe with small pipe diameter pvc pipe is extracted from Large Diameter Pipeline pvc pipe inconvenience out, because blind end produces negative pressure when extracting out, hinder The extraction of pipe with small pipe diameter pvc pipe；

3) easily stop working when pipe with small pipe diameter pvc pipe being extracted out from Large Diameter Pipeline pvc pipe, because blind end produces negative pressure when extracting out, Rarefaction of air, is unfavorable for burning.

Summary of the invention

For above-mentioned problems of the prior art, this utility model provides a kind of compression-ignited firing device.Purpose is There is provided one have simple in construction, be easy to carry, without can expendable auxiliary fire-lighter, and simple to operate, easy to use, suitable The firing device used when tourism, exploration and the design and calculation method being applicable to compression-ignited firing device.

In order to realize foregoing invention purpose, this utility model is achieved through the following technical solutions:

A kind of compression-ignited firing device, including cylinder and piston；Piston is inserted in the inner chamber body of cylinder, and cylinder body bottom is even Being connected to base, base is provided with groove, is provided with the cavity volume that can accommodate combustibles in this groove.

Described cylinder is tubular structure, and piston is rod-like structure；Described cylinder upper/lower terminal is equipped with opening, and opening is straight Footpath is consistent with cylinder internal diameter；One end of described piston is inserted in the inner chamber body of cylinder from the upper, open end of cylinder, is inserted The stem portion of cylinder, its length is equal to the cylinder lumen degree of depth or less than the cylinder lumen degree of depth；When piston inserts cylinder, and After barrel aperture is crossed in its front end, in cylinder, form the air chamber of closing；Piston and cylinder are matched in clearance, and piston can be at cylinder Air in the most mobile also compression cylinder body in the inner chamber of body.

The little hole number of described barrel is 2-4.

Described cylinder lower end be hinged with can the base of folding, described cylinder has edge on the barrel away from lower end certain distance The aperture that circumference is uniform；At faying face between described cylinder and base, base is embedded with metal material or prevents fires nonmetal The refractory seals pad of material.

The stem portion of described piston has annular groove, and piston rod shape part has one group of equally spaced annular groove, The scope of open loop connected in star is: assume fully-inserted for piston cylinder, and barrel aperture is until piston rod shape corresponding to cylinder lower end Part is the scope needing open loop connected in star.

Described annular groove spacing 3～5mm, annular groove cross sectional shape is V-arrangement, rectangle or semicircle.

The other end of described piston is provided with handle convenient to operate；Described combustibles include Linesless charcoal, paper scrap, cotton, fluffy grass, Cotton Gossypii, wood flour.

Described piston is provided with mark, mark be i.e. prompting user piston should be previously inserted in cylinder lumen deep Degree.

Advantage of the present utility model and providing the benefit that:

This utility model utilizes Fast Compression air can make the compression-ignition principle that its temperature drastically raises, it is achieved that merit of igniting Can, there is simple in construction, be easy to carry, easy to use and without flint, battery, fuel etc. can expendable auxiliary fire-lighter excellent Point, is suitable to use when tourism, exploration.

This utility model utilizes Fast Compression air can make the compression-ignition principle that its temperature drastically raises, and lights open air and is prone to obtain The combustibles such as the Linesless charcoal that takes, paper scrap, cotton, fluffy grass are as kindling material, it is achieved function of igniting.This utility model is simple and practical, is suitable for In the detailed design of compression-ignited firing device, and practicality is stronger.

Accompanying drawing explanation

Fig. 1 is the structural representation of prior art；

Fig. 2 is structural representation of the present utility model (piston is in the position just starting compression closing chamber air)；

Fig. 3 is the view of the fully-inserted cylinder of piston in Fig. 2；

Fig. 4 is the right view of this utility model preferred embodiment；

Fig. 5 is the front view of this utility model preferred embodiment；

Fig. 6 is the left view of this utility model preferred embodiment.

In figure: handle 1, piston 2, cylinder 3, aperture 4, air chamber 5, base 6, sealing gasket 7, combustibles 8, identify 9.

Detailed description of the invention

Embodiment 1:

This utility model is a kind of compression-ignited firing device, below with reference to accompanying drawing, is preferable to carry out of the present utility model Example is described in detail: should be appreciated that preferred embodiment is only for explanation this utility model rather than in order to limit this practicality newly The protection domain of type.

A kind of compression-ignited firing device of this utility model is mainly made up of tubular barrel 3 and bar-shaped piston 2, the one of piston 2 Holding the upper, open end from cylinder 3 to be inserted in the inner chamber body of cylinder 3, the other end of piston 2 is provided with handle 1；Connect bottom cylinder 3 Being connected to base 6, at the faying face between cylinder 3 and base 6, be embedded with refractory seals pad 7 on base 6, this sealing gasket 7 is selected Metal material or fireproof non-metallic material.

Its middle cylinder body 3 is tubular structure, and piston 2 is rod-like structure.The described cylinder 3 equal opening of upper/lower terminal, opening diameter Consistent with cylinder 3 internal diameter, described cylinder 3 lower end be hinged with can the base 6 of folding, base 6 is provided with groove, has in this groove The cavity volume of combustibles 8 can be accommodated.Described cylinder 3 has the aperture 4 being evenly distributed, institute on the barrel away from lower end certain distance Stating barrel aperture 4 quantity is 2-4.Described combustibles 8 include: Linesless charcoal, paper scrap, cotton, fluffy grass, Cotton Gossypii, wood flour etc..

Described piston 2, its stem portion has one group of equally spaced annular groove, piston 2 stem within the specific limits Separately the scope of annular groove determines as follows: assume fully-inserted for piston 2 cylinder 3, and barrel aperture 4 is until cylinder 3 Piston 2 stem portion corresponding to lower end is the scope needing open loop connected in star.Described annular groove spacing 3～5mm, annular groove Cross sectional shape is the shape that V-arrangement, rectangle or semicircle etc. are prone to processing.

One end of described piston 2 is inserted in the inner chamber body of cylinder 3 from the upper, open end of cylinder 3, inserted cylinder 3 Stem portion, its length is equal to cylinder 3 depth of inner cavity or less than cylinder 3 depth of inner cavity.When piston 2 inserts cylinder 3, and its After barrel aperture 4 is crossed in front end, in cylinder 3, form the air chamber 5 closed.

Described piston 2 is provided with mark 9, and mark 9 is i.e. that prompting user piston 2 should be previously inserted at cylinder 3 inner chamber In the degree of depth.The other end of piston 2 is additionally provided with handle 1 convenient to operate, and piston 2 and cylinder 3 are matched in clearance, and piston 2 can be The inner chamber of cylinder 3 quickly moves and compresses the air in cylinder 3.

Embodiment 2:

The major parts such as the piston 2 of this preferred embodiment, cylinder 3, base 6, material selection intensity is high, heat conductivity is relatively low Rustless steel, ensureing on the premise of structural strength, reducing the adverse effect that device heat conducting and radiating brings igniting.

The piston 2 of this preferred embodiment, cylinder 3, the H11/c11 selecting gap bigger coordinates, it is ensured that bigger at sand and dust Outdoor environment piston 2 can move flexibly.

Principle Analysis of the present utility model is as follows:

Basic thought of the present utility model, is to utilize Fast Compression air can make the compression-ignition principle that its temperature drastically raises, Light the combustibles such as Linesless charcoal that open air is easily obtained, paper scrap, cotton, fluffy grass as kindling material, it is achieved function of igniting.

This preferred embodiment realizes the mode of Fast Compression air: compress the occluded air chamber 5 in cylinder 3 with piston 2. Piston 2 end is provided with handle 1, in order to operation.In order to prevent piston 2 from extruding combustibles 8 in excessively going deep into cylinder 3, piston 2 can Inserting the stem portion of cylinder 3, its length should be not more than cylinder 3 depth of inner cavity.

For the ease of placement and the taking-up of combustibles 8, this preferred embodiment is hinged in cylinder 3 lower end can the base of folding 6, base 6 also has the cavity volume that can accommodate combustibles 8.When base 6 is opened, it is convenient to place combustibles 8 in its cavity volume Or take out the combustibles 8 lighted.Refractory seals pad 7 also it is embedded with, it is ensured that the end at the position of base 6 with the laminating of cylinder 3 lower end Seat 6 Guan Bi time cylinder 3 and base 6 between sealing.

Problems with will affect the effect of igniting of this preferred embodiment:

(1) in order to ensure that the outdoor environment piston 2 sand and dust are bigger can move flexibly, piston 2, cylinder 3 have been selected bigger Fit clearance, when thus bringing compressed air, pressure-air is from the problem of gap seepage；

(2) part such as cylinder 3, piston 2, base 6 contacts with compressed air, and its heat conducting and radiating effect is by reduction compression sky The temperature of gas.

For gap leakage problems, between this preferred embodiment has one group etc. in the certain limit of piston 2 stem portion Away from annular groove, make flow losses during compressed air seepage be converted into multiple linear loss and office by single linear loss The combination of portion's loss, is remarkably improved compressed-air actuated seepage resistance, reduces air leakage.In order to ensure sealing, annular The distance of groove is 4mm.The cross sectional shape of annular groove can be the shape that V-arrangement, rectangle or semicircle etc. are prone to processing.

On piston 2, another advantage of open loop connected in star is that this annular groove actually also plays the effect of balancing slit, Make at piston 2 fluting pressure circumferentially identical, reduce the side force of piston 2 and cylinder 3, thus reduce when piston 2 moves Frictional resistance.Correlational study result shows, opens three balancing slits and side force can be made to reduce to less than 24%, open seven and can reduce to About 2.7%.

Smooth and easy in order to make piston 2 move in cylinder 3, before quickly promoting piston 2 to compress occluded air chamber 5, should make Piston 2 is previously inserted cylinder 3 certain depth, and this section of cylinder 3 can be considered guide section.About quickly promoting piston 2 to compress Before occluded air chamber 5, how to judge that piston 2 has reached the sufficiently long correct position of guarantee guide section, Ke Yiyou Multiple method, such as scribe position labelling on the piston 2, arranging stress on piston 2 or cylinder 3 can the positioning devices etc. of retraction. It is simpler that this utility model have employed a kind of structure, use more easily method: opens on the barrel of cylinder 3 and is evenly distributed Aperture 4.Barrel aperture 4 is evenly distributed and can ensure that piston 2 uniform force；Considering from processing technology, 3 apertures are the suitableeest Preferably.

The cylinder 3 of barrel aperture more than 4 is guide section, the most then be the part of occluded air.During use, first by base 6 Guan Bi, inserts cylinder 3 by piston 2.When barrel aperture 4 is not crossed in piston 2 front end, the air in cylinder 3 is by barrel aperture 4 row Going out, piston 2 can move smoothly；When barrel aperture 4 is crossed in piston 2 front end, due to the occluded air chamber 5 shape in cylinder 3 Becoming, the resistance that piston 2 moves substantially increases, and user i.e. may know that piston 2 reaches to ensure that the suitable of guide section length Position.

A kind of compression-ignited firing device is utilized to carry out igniting and specifically include following work process:

The first step: open base 6, places the combustibles 8 such as Linesless charcoal, paper scrap, cotton, fluffy grass in its cavity volume；

Second step: closed base 6, is vertically placed on ground down by cylinder 3 base 6 so that it is stable；

3rd step: piston 2 is inserted cylinder 3 to its front end and barrel aperture 4 and essentially coincides position, now, even if not Holding piston 2, owing to the occluded air chamber 5 in cylinder 3 has been formed, piston 2 is by static or slowly decline；

4th step: the most fiercely tap or push down on by quick-moving speed 1, the handle of piston 2 with the weight such as iron hammer, stone Position, makes piston 2 the soonest, insert in cylinder 3 as far as possible, in order to the temperature in cylinder 3 occluded air chamber 5 carries as far as possible High；

5th step: open base 6, checks that combustibles 8 are ignited the most；

6th step: repetition step 3 is to step 5, until combustibles are ignited.

Embodiment 3:

When the compression-ignited firing device of one described in utilization is ignited, specifically include following operating process:

(1) kind of the firing device combustibles for igniting is determined；

(2) consulting literatures data or by test, determine in the combustibles 6 for igniting, the peak of ignition temperature T_max；

(3) Fast Compression air: in order to ensure the reliability ignited, in the highest ignition temperature of combustibles 6 for igniting T_maxOn the basis of, determine and increase certain temperature margin Δ T, i.e. as shown in formula (1), with the highest ignition temperature T_maxAbundant with temperature Degree Δ T sum, the temperature desired value T ended as the compression of firing device occluded air chamber 5₂；

T₂=T_max+ΔT (1)

(4) determine ambient temperature when firing device works and ambient atmosphere pressure, and with temperature T initial for compression₁ With pressure P₁, the temperature desired value T of compression end of a period₂Determined by formula (1), these three known parameters are substituted into formula (2), formula (3), simultaneous calculates the pressure P that compression ends₂And the initial volume ratio ended with compression of compression

$\frac{P_1{V}_1}{T_1}=\frac{P_2{V}_2}{T_2}---\left(2\right)$

$\frac{P_1}{T_1^{\frac{k}{k-1}}}=\frac{P_2}{T_2^{\frac{k}{k-1}}}---\left(3\right)$

In formula: P is air absolute pressure, V is volume of air, and T is aerothermodynamics temperature, and k is air isentropic index, under Mark 1,2 represents the initial of compression process and end of a period state respectively；

In formula, the measurement unit of each numerical value is as follows:

T:k；

P:Pa；

V: cubic meter；

L:m；

M:kg；

D:m。

(5) combustibles 6 size wishing to put into firing device, after determining therefrom that the fully-inserted cylinder of piston 24, cylinder are determined Length L of body 4 remaining space inside₂, namely occluded air chamber 5 length that compression ends；

(6) by initial for the compression volume ratio ended with compressionOccluded air chamber 5 length L ended with compression₂Substitution formula (4) occluded air chamber 5 length L that compression process is initial, is calculated₁；

$\frac{L_1}{L_2}=\frac{V_1}{V_2}---\left(4\right)$

(7) smooth and easy in order to make piston 2 move in cylinder 4, before quickly promoting piston 2 to compress occluded air chamber 5, make Piston 2 is previously inserted cylinder 4 certain depth, and this section of cylinder 4 can be considered guide section, determines guide section length L by formula (5)₀, And away from piston 2 front end L₀Place takes to mark the degree of depth that the modes such as mark point out user piston 2 to be previously inserted；

$\frac{1}{3}{L}_1\≤L_0\≤\frac{1}{2}{L}_1---\left(5\right)$

(8) degree of depth L of cylinder 4 inner chamber is determined by formula (6)_p；

L_p=L₁+L₀ (6)

(9) piston 2 stem portion length L is determined by formula (7)_r；

L_r=L_p-L₂ (7)

(10) determine body weight m of typically used as person, and substitute into the compression end of a period pressure P having calculated that₂, calculate by formula (8) The diameter of piston 2, i.e. cylinder 4 internal diameter D.

$P_2-P_1=\frac{mg}{\frac{1}{4}{\mathrm{\πD}}^2}---\left(8\right)$

In formula: m represents the quality of user, g is acceleration of gravity, and π is pi, P₁For pressure.

Occluded air chamber 5 length L that described compression ends₂, less than or equal to 10mm.

Described piston 2 diameter D, more than or equal to 10mm.

The present embodiment uses away from piston 2 front end L₀The mode of place's marking mark 3 points out user piston 2 to be previously inserted The degree of depth.

Principle labor of the present utility model is as follows:

Basic thought of the present utility model, is to utilize Fast Compression air can make the compression-ignition principle that its temperature drastically raises, Light the combustibles such as Linesless charcoal that open air is easily obtained, paper scrap, cotton, fluffy grass as kindling material, it is achieved function of igniting.

Inspection information is known, the ignition point of the combustibles 6 such as Linesless charcoal, paper scrap, cotton, fluffy grass in the range of 300～500 DEG C, therefore Take the peak T of ignition temperature_maxIt it is 500 DEG C.

Consider the temperature margin of 20%, i.e. Δ T is 100 DEG C, then the temperature desired value T that occluded air chamber 5 compression ends₂Reach Can be with reliable ignition combustibles 6 to 600 DEG C (873K).

This utility model realizes the mode of Fast Compression air: compress the occluded air chamber 5 in cylinder 4 with piston 2.By Aerothermodynami volume, this process can approximate and be considered as isentropic procedure, therefore, and the initial and end of a period state of compression process, following Formula is set up:

$\frac{P_1{V}_1}{T_1}=\frac{P_2{V}_2}{T_2}---\left(2\right)$

$\frac{P_1}{T_1^{\frac{k}{k-1}}}=\frac{P_2}{T_2^{\frac{k}{k-1}}}---\left(3\right)$

Wherein: formula (2) is The Ideal-Gas Equation；Formula (3) is isentropic procedure equation；P is air absolute pressure；V is Volume of air；T is aerothermodynamics temperature；K is air isentropic index；Subscript 1,2 represents the initial and whole of compression process respectively State.

For the present embodiment, it is 1 × 10 that pressure shrinks the ambient atmosphere pressure of beginning⁵Pa, volume are 100%, temperature is 293K, the temperature that pressure contracting ends is 873K identified above, and taking isentropic index is 1.4.Data above is substituted into formula (2), (3), solve:

V₂=6.5%, P₂=45.7 × 10⁵Pa (absolute pressure).

As long as above-mentioned result of calculation is it is meant that by the 6.5% of air Fast Compression to original volume, can obtain 600 DEG C (873K) high temperature, it was demonstrated that the reasonability of this utility model basic thought.

Based on above-mentioned result of calculation, occluded air chamber 5 length L that the present embodiment pressure contracting ends₂For 6.5mm.Due to envelope It is cylindric for closing air chamber, and its volume is directly proportional to length, therefore formula (4) is set up, and can solve the initial occluded air chamber 5 of compression long Degree L₁For 100mm.

$\frac{L_1}{L_2}=\frac{V_1}{V_2}---\left(4\right)$

From formula (4), L₁With L₂It is directly proportional, in order to easy to use, the overall length of firing device should be limited, therefore this practicality is new Type limits occluded air chamber 5 length L that compression ends₂Less than or equal to 10mm.

Smooth and easy in order to make piston 2 move in cylinder 4, before quickly promoting piston 2 to compress occluded air chamber 5, make to live Plug 2 is previously inserted cylinder 4 certain depth, and this section of cylinder 4 can be considered guide section.Guide section length L₀Empirically by formula (5) Determining, the present embodiment takes L₀For 50mm, and away from piston 2 front end L₀Place's marking mark 3 prompting user piston 2 should be in advance It is inserted in the degree of depth in cylinder 4 inner chamber.

Degree of depth L of cylinder 4 inner chamber is can determine that by formula (6)_pFor 150mm.

L_p=L₁+L₀ (6)

Piston 2 stem portion length L is can determine that by formula (7)_rFor 143.5mm.

L_r=L_p-L₂ (7)

The firing device that this utility model relates to, needs Fast Compression piston 2 during use, the mode of compression can be that weight strikes Hit or rely on the body weight pressure of user self by, this utility model is from the point of view of convenient realization, by relying on user self Body weight pressure by design.It is 60kg that the present embodiment takes quality m of typically used as person, and substitutes into the compression end of a period pressure having calculated that P₂, by body weight and relation during atmospheric pressure balance, i.e. formula (8) calculates piston 2 diameter, i.e. cylinder 4 internal diameter D is 13mm.

$P_2-P_1=\frac{mg}{\frac{1}{4}{\mathrm{\πD}}^2}---\left(8\right)$

In formula: g is acceleration of gravity, π is pi.

In order to ensure intensity and the processing technology of cylinder 4 of piston 2, the diameter D that this utility model limits piston 2 is big In equal to 10mm.

By said method disclosed in this utility model, i.e. can determine that the main structure parameters of involved firing device, Other as the strut stability of material selection, piston 2 check, the wall thickness of cylinder 3 chooses and strength check etc. is structure The regular content of design, this utility model is not related to.

The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, it is clear that this area Technical staff this utility model can be carried out various change and modification without deviating from spirit and scope of the present utility model.This Sample, if of the present utility model these amendment and modification belong to this utility model claim and equivalent technologies thereof scope it In, then this utility model is also intended to comprise these change and modification.

Claims (8)

1. a compression-ignited firing device, including cylinder (3) and piston (2), it is characterised in that: piston (2) is inserted in cylinder (3) Inner chamber body in, cylinder (3) bottom connect have base (6), base (6) to be provided with groove, be provided with in this groove can accommodate inflammable The cavity volume of thing (8).

The compression-ignited firing device of one the most according to claim 1, it is characterised in that: described cylinder (3) is tubular structure, Piston (2) is rod-like structure；Described cylinder (3) upper/lower terminal is equipped with opening, and opening diameter is consistent with cylinder (3) internal diameter；Institute The one end stating piston (2) is inserted in the inner chamber body of cylinder (3) from the upper, open end of cylinder (3), the bar of inserted cylinder (3) Shape part, its length is equal to cylinder (3) depth of inner cavity or less than cylinder (3) depth of inner cavity；When piston (2) inserts cylinder (3), And after barrel aperture (4) is crossed in its front end, in cylinder (3), form the air chamber (5) closed；Piston (2) with cylinder (3) is Matched in clearance, piston (2) can quickly move in the inner chamber of cylinder (3) and compress the air in cylinder (3).

The compression-ignited firing device of one the most according to claim 2, it is characterised in that: described barrel aperture (4) quantity is 2-4.

The compression-ignited firing device of one the most according to claim 1, it is characterised in that: described cylinder (3) lower end is hinged with Can the base (6) of folding, described cylinder (3) has the aperture (4) being evenly distributed on the barrel away from lower end certain distance；Institute State at the faying face between cylinder (3) and base (6), base (6) is embedded with metal material or the resistance to of non-metallic material of preventing fires Elevated-temperature seal pad (7).

The compression-ignited firing device of one the most according to claim 1, it is characterised in that: the stem portion of described piston (2) Having annular groove, piston (2) stem portion has one group of equally spaced annular groove, and the scope of open loop connected in star is: assume By piston (2) fully-inserted cylinder (3), barrel aperture (4) is until piston (2) stem portion corresponding to cylinder (3) lower end is Need the scope of open loop connected in star.

The compression-ignited firing device of one the most according to claim 5, it is characterised in that: described annular groove spacing 3～ 5mm, annular groove cross sectional shape is V-arrangement, rectangle or semicircle.

The compression-ignited firing device of one the most according to claim 1, it is characterised in that: the other end of described piston (2) sets There is handle (1) convenient to operate；Described combustibles (8) include Linesless charcoal, paper scrap, cotton, fluffy grass, Cotton Gossypii, wood flour.

8. according to the compression-ignited firing device of the one described in claim 1, it is characterised in that: described piston (2) is provided with mark (9), mark (9) is i.e. that prompting user piston (2) should be previously inserted the degree of depth in cylinder (3) inner chamber.