A dry powder identification method and device

Abstract

The present invention discloses a dry powder identification method and device, including: first, in a closed and dry environment, measuring the minimum amount of new powder required for N successful fire extinguishing of a combustible object, which can just extinguish the largest fire; wherein N≥5; in the same environment, taking an equal amount of dry powder to be tested to extinguish the same combustible object; if the fire extinguishing is successful, it is determined that the dry powder to be tested in the fire extinguishing can be reused; if the fire extinguishing fails, it is determined that the dry powder to be tested cannot be reused. The present invention can realize the visual identification of the fire extinguishing performance of dry powder (expired dry powder, dry powder to be refilled, etc.), and the dry powder performance test can be completed with very little dry powder and combustible objects, and the test results are accurate and highly safe.

Description

Technical Field

[0001] The invention relates to the technical field of fire extinguishers, and in particular to a method and a device for visually identifying dry powder in a fire extinguisher. Background Art

[0002] The life of dry powder in existing dry powder fire extinguishers is in accordance with national standards, that is, the national standards of most countries stipulate that the dry powder in dry powder fire extinguishers needs to be replaced after more than 5 years; however, for expired dry powder, if its fluidity still meets the national standards, it is currently impossible to determine whether the fire extinguishing agent will lose its fire extinguishing effect; at the same time, during the production process of fire extinguishers and dry powder, the fire extinguishing effect of each batch of new powder is not tested.

[0003] For example: Use the same type and same manufacturer of powder and fire extinguisher:

[0004] A. For children aged 25 and 65, use a 10 or 12 kg dry powder fire extinguisher with a total weight of nearly 20 kg.

[0005] B. Experienced people wearing well-insulated firefighting suits and inexperienced people not wearing firefighting suits.

[0006] C. The fire extinguishing environment temperature can be in a place >0 degrees, or in the tropics or summer.

[0007] The results obtained can differ by several times, so the problem is not with the powder or the fire extinguisher. This trouble often occurs in countries where the lifespan of the type test report is only 5 years. Just because the tester is old or has resigned, or the temperature and wind speed..., the most important fire extinguishing test will fail. Because it is impossible to fix automatic mechanical fire extinguishing, the fire extinguishing standard formed by the right time, place and people is useless.

[0008] The existing reuse technology for windowless fire extinguishers (fire extinguishers where the fluidity of the dry powder in the metal bottle cannot be observed by the naked eye during inspection) has been used for many years in environmental protection countries, but the cost of reuse may be higher than producing new ones. The operation process is:

[0009] ① Take out expired dry powder from the fire extinguisher;

[0010] ② Each fire extinguisher must be identified as ABC dry powder (acidic);

[0011] ③ Must use a large machine to mix evenly;

[0012] ④ If it does not meet the national standards, there are complicated procedures to make it meet the national standards.

[0013] The problems with the above technology are:

[0014] ① If the mixing barrel capacity of each batch of this machine is 10 tons but it mistakenly contains 1% BC baking soda dry powder (alkaline), but because it has been evenly mixed, the entire barrel of 10 tons must be scrapped for ABC dry powder fire extinguishing agent.

[0015] ② The time from powder collection to finished product is sometimes as long as dozens of days, and it is exposed to high humidity in the air and gets damp. Because the whole set of equipment is huge and difficult to seal, it is difficult to use a dehumidifier to remove moisture from the air, so the dehumidification of A④ is particularly difficult to handle.

[0016] ③ No fire extinguishing test was performed, so there was no assessment of whether it was suitable for fire extinguishing!

[0017] ④ Whether it is reused, new brand powder, or there is an unexpected hardening problem within 5 years and it cannot be fired, it is because there is no window to observe the powder in the metal bottle. Therefore, all over the world, there is a standard that dry powder fire extinguishing agents must be scrapped after 5 years. Summary of the invention

[0018] In view of the deficiencies in the prior art, the present invention provides a visual identification method and device for identifying dry powder in a fire extinguisher.

[0019] The present invention discloses a dry powder identification method, comprising:

[0020] In a closed and dry environment, measure the amount of new powder required to successfully extinguish the burning object N times; where N ≥ 5;

[0021] Under the same environment, take the same amount of dry powder to be tested to extinguish the same burning material;

[0022] If the fire is extinguished successfully, it is determined that the dry powder to be tested can be reused;

[0023] If the fire extinguishing fails, it is determined that the dry powder to be tested cannot be reused.

[0024] As a further improvement of the present invention, the humidity of the environment is lower than the humidity in the fire extinguisher bottle, and the temperature is within the national standard range.

[0025] As a further improvement of the present invention, N is 10.

[0026] As a further improvement of the present invention, the combustible material is wood or heptane oil, the wood is used for identifying and extinguishing Class A fire, and the heptane oil is used for identifying and extinguishing Class B fire.

[0027] As a further improvement of the present invention, the required amount of new powder or the amount of dry powder to be tested is less than 1% of the total amount of dry powder in the fire extinguisher.

[0028] The present invention also discloses a dry powder identification device, which comprises, from top to bottom, a powder blowing component, a dry powder container for placing dry powder, a combustion material container and a driving component;

[0029] The dry powder container is placed in the upper part of the fire extinguishing box with a lower opening, the blowpipe of the powder blowing assembly is located above the dry powder container, and the switch of the powder blowing assembly is triggered by the driving assembly; the combustion container is placed on the rising platform, and the rising platform is connected to the driving assembly;

[0030] After adding the weighed dry powder to be tested and the combustible material into the dry powder container and the combustible material container, the combustible material is ignited, and the driving component drives the ascending platform to move upward to close the lower opening of the fire extinguishing box. At this time, the driving component triggers the powder blowing component to work; the powder blowing component blows away the dry powder to be tested in the dry powder container through the blowpipe to extinguish the combustible material; if the fire is extinguished successfully, it is determined that the dry powder to be tested can be reused; if the fire is extinguished unsuccessfully, it is determined that the dry powder to be tested cannot be reused.

[0031] As a further improvement of the present invention, the powder blowing assembly comprises: a piston cylinder, a piston and a starting oblique hook;

[0032] The piston is placed in the vertical piston cylinder, the lower end of the piston cylinder is embedded in the cover of the fire extinguishing box, and the inner cavity of the piston cylinder is communicated with the inner cavity of the fire extinguishing box through the blowpipe; when the piston falls from top to bottom in the piston cylinder, the air in the piston cylinder is blown out through the blowpipe to blow away the dry powder to be tested in the dry powder container;

[0033] The starting oblique hook is arranged on the upper part of the piston cylinder, and is used for hooking the piston to be dropped.

[0034] As a further improvement of the present invention, the driving assembly comprises: a cylinder and a starting rod;

[0035] The ejection end of the cylinder is connected to the lifting platform, and the starting rod is installed on the lifting platform;

[0036] When the ascending platform moves upward to close the lower opening of the fire extinguishing box, the starting rod lifts up the starting oblique hook to make the starting oblique hook break away from the restriction on the piston.

[0037] As a further improvement of the present invention, the dry powder container comprises a dry powder cup, a cup holder and a bracket;

[0038] The dry powder cup contains the dry powder to be tested, and the dry powder cup is placed on the cup holder, and the cup holder is fixed in the fire extinguishing box through the bracket.

[0039] As a further improvement of the present invention, the combustion material container includes a match socket and a heptane oil tray.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The present invention can realize visual identification of the fire extinguishing performance of dry powder (expired dry powder, dry powder to be refilled, etc.), and only a very small amount of dry powder and combustible materials are required to complete the test of the dry powder performance, and the test results are accurate and highly safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A state diagram of an identification device after fire extinguishing disclosed in an embodiment of the present invention;

[0043] Figure 2 This is a state diagram of an identification device before fire extinguishing disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0046] The present invention provides a dry powder identification method, comprising:

[0047] Step 1: First, in a closed and dry environment, measure the minimum amount of new powder required to successfully extinguish the largest fire for N times;

[0048] During the testing phase, the required environment is windless, dry, and of appropriate temperature, which meets the requirements of the dry powder in the fire extinguisher. Furthermore, the humidity of the environment is lower than the humidity in the fire extinguisher bottle, and the temperature is within the national standard range. The above environment can be achieved by adding equipment such as air conditioners and dryers.

[0049] The environmental factors in each of the above measurements are consistent, the number of tests N≥5, preferably N=10; if the same amount of new powder or standard powder can meet the fire extinguishing requirements of the burning materials, when the dry powder to be tested cannot extinguish the fire under the same environment, it can be indicated that the dry powder is invalid or does not meet the standard requirements.

[0050] In order to ensure that the dry powder required for the test is consistent with the dry powder filled in the fire extinguisher bottle, it is necessary to ensure that the amount of dry powder required for the test does not affect the filling of the fire extinguisher bottle with the remaining dry powder as much as possible; for this reason, the present invention selects the amount of dry powder to be tested to be less than 1% of the total dry powder amount in the fire extinguisher. Further, for a fire extinguisher with a dry powder filling amount of 2000g, the present invention can select 5-20g during the test; further, if it is found that the net filling weight is lower than the standard later, new dry powder from this fire extinguisher can be used to add.

[0051] In order to test Class A and B fires, the present invention can select different types of combustibles; for example, the combustibles are wood or heptane oil of the same fire material, the wood is used to identify and extinguish Class A fires, and the heptane oil is used to identify and extinguish Class B fires.

[0052] Furthermore, in step 1, new powder of one type only needs to be identified once.

[0053] Step 2: After verifying the amount of standard powder or new powder required for fire extinguishing, take an equal amount of the dry powder to be tested to extinguish the same burning object under the same environment; wherein,

[0054] In step 2, the only difference from step 1 is that the dry powder is replaced, and the other conditions are guaranteed to be the same, and the above test only needs to be tested once;

[0055] Furthermore, in step 2, each dry powder to be tested needs to be identified before filling.

[0056] Step 3: If the fire is extinguished successfully, the dry powder to be tested in the fire extinguisher can be reused;

[0057] Step 4: If the fire extinguishing fails, the dry powder to be tested in the fire extinguishing device cannot be reused.

[0058] like Figure 1 , 2 As shown, based on the dry powder identification method of the technology, the present invention provides a dry powder identification device that can realize the above identification method, which includes from top to bottom: a powder blowing component, a dry powder container for placing dry powder, a combustion container and a driving component; wherein,

[0059] The dry powder container is placed in the upper part of the fire extinguishing box with a lower opening, the blow pipe of the powder blowing assembly is located above the dry powder container, and the switch of the powder blowing assembly is triggered by the driving assembly; the combustible material container is placed on the rising platform, and the rising platform is connected to the driving assembly; when in use, after adding the weighed dry powder to be tested and the combustible material into the dry powder container and the combustible material container, the combustible material is ignited, and the driving assembly drives the rising platform to move upward to the lower opening of the closed fire extinguishing box, and after reaching the fixed combustion, the driving assembly triggers the powder blowing assembly to work; the powder blowing assembly blows away the dry powder to be tested in the dry powder container through the blow pipe to extinguish the combustible material; if the fire is extinguished successfully, it is determined that the dry powder to be tested can be reused; if the fire is extinguished unsuccessfully, it is determined that the dry powder to be tested cannot be reused.

[0060] Specifically:

[0061] The powder blowing assembly of the present invention includes: a blowing pipe 5, a piston cylinder 3, a piston 4, and a starting hook 12. The piston 4 is placed in the vertical piston cylinder 3. The lower end of the piston cylinder 3 is embedded in the lid 14 of the fire extinguishing box 16. The inner cavity of the piston cylinder 3 communicates with the inner cavity of the fire extinguishing box 16 through the blowing pipe 5. When the piston 4 falls from top to bottom in the piston cylinder 3, the air in the piston cylinder 3 is blown out through the blowing pipe 5 to disperse the powder to be tested in the powder container. The design of the equipment is such that when the powder is dispersed, it will become dust with uniform density for fire extinguishing. The starting hook 12 is arranged at the upper part of the piston cylinder 3 and is used to hook the piston 4 to be dropped.

[0062] More specifically, the powder blowing assembly of the present invention includes: a blowing pipe 5, a piston cylinder 3, a piston 4, a starting hook 12, and a stopper 1. Among them, the upper part of the piston cylinder 3 is fixed on the fixing frame 11 through the piston cylinder centering clamp 2, and the fixing frame 11 is installed on the "冂"-shaped workbench 19. The piston cylinder 3 is arranged vertically, and the lower end of the piston cylinder 3 abuts against the lid 14 on the top of the fire extinguishing box 16. A gasket can be provided between the piston cylinder 3 and the lid 14 for embedding or at the connection to ultimately ensure that the connection between the piston cylinder 3 and the lid 14 is sealed and airtight. The blowing pipe 5 of the present invention is vertically inserted on the lid 14, and the upper end of the blowing pipe 5 is flush with the top surface of the lid. If it protrudes from the lid, it may affect the falling space of the piston 4. At the same time, the design that the upper end of the blowing pipe 5 is lower than the lid 14 can also be selected. The lower end of the blowing pipe 5 extends out of the bottom of the lid 14 and is located directly above the powder container. The specific distance can be selected through experiments to obtain the optimal spacing. The present invention is provided with a piston 4 in the piston cylinder 3 that fits the inner wall of the piston cylinder and has no sealing ring structure. The piston 4 can slide up and down in the piston cylinder 3. When the piston 4 falls from top to bottom in the piston cylinder 3, it can compress the air in the inner cavity of the piston cylinder below the piston 4 and blow out a fixed amount of air through the blowing pipe 5 to disperse the powder to be tested in the powder container for subsequent powder identification tests.

[0063] Furthermore, in order to ensure the automatic control of the piston release, the present invention is provided with a starting hook 12 at the upper part of the piston cylinder. The hook part of the starting hook 12 extends into the piston cylinder 3 through an opening on the side wall of the piston cylinder, and the driving part of the starting hook 12 is exposed outside. When the starting hook 12 is in a state without external force, its driving part falls, and the hook part tilts upward. The tilted hook part hooks the bottom of the piston 4 to prevent the piston 4 from falling. When starting the test, the driving component is used to push up the driving part of the starting hook 12, then the hook part retracts outward, and at this time, the restriction on the piston 4 is released, and the piston 4 falls from top to bottom in the piston cylinder 3 under the action of its own weight.

[0064] Furthermore, when the piston 4 falls to the bottom of the piston cylinder 3, the present invention can lift the piston to a preset height by reverse blowing (from bottom to top) and limit it by starting the inclined hook 12; to prevent the piston 4 from being directly pushed out of the piston cylinder 3, the present invention has an anti-slip device 1 fixed on the top of the piston cylinder 3.

[0065] Specific:

[0066] The dry powder container of the present invention comprises a dry powder cup 15, a cup holder 6 and a bracket 7. The dry powder cup 15 contains the dry powder to be tested, and the dry powder cup 15 is placed on the cup holder 6. The cup holder 6 is fixed in the fire extinguishing box 16 through the bracket 7. The fire extinguishing box 16 is fixed to the fixing frame through a fixing clip. Further, in the above structure, the piston cylinder 3, the cover 14, the fire extinguishing box 16 and the fixing frame 11 are fixed to each other.

[0067] Specific:

[0068] The combustion container of the present invention includes a match socket 8 and a heptane oil pan 9, which are arranged on a rising platform 18, and a ring-shaped sealing rubber pad 10 is provided on the rising platform 18 relative to the lower opening of the fire extinguishing box 16; at the same time, the rising platform 18 is connected to the driving component; when the driving component drives the rising platform to move to the lower opening of the closed fire extinguishing box 16, the fire extinguishing box 16, the cover 14 and the rising platform 18 constitute a closed space, the dry powder cup 15 is located at the upper part of the closed space, and the match socket 8 and the heptane oil pan 9 are located at the lower part of the closed space; after the dry powder to be tested in the dry powder cup 15 is blown away, it can be used for fire extinguishing test of the combustion material below.

[0069] Furthermore, in the present invention, a small ventilation hole 17 is provided on the wall of the fire extinguishing box 16. The design of the ventilation hole 17 ensures that the burning objects in the fire extinguishing box 16 are not extinguished due to lack of oxygen.

[0070] Specific:

[0071] The driving assembly of the present invention includes: a cylinder 20 and a starter rod 13; the cylinder 20 is installed on a workbench 19, and the ejection end of the cylinder 20 or other actuator is connected to the lifting platform 18, one end of the lifting platform 18 is installed with a vertical starter rod 13, and the other end of the lifting platform 18 is slidably set on the fixing frame 13. When the lifting platform 18 moves upward to close the lower opening of the fire extinguishing box 16, the starter rod 13 moves upward to lift the drive part of the starter oblique hook 12, so that the hook part of the starter oblique hook 12 is separated from the restriction on the piston 4.

[0072] Example:

[0073] The method of using the above identification device of the present invention is:

[0074] Step 1. The workshop sets the dryer / air conditioner to a temperature within the national standard range;

[0075] Step 2. Press the solenoid valve lowering button to lower the lifting platform 18 onto the working platform 19;

[0076] Step 3. Connect the cover 14, the piston cylinder 3 and the blowpipe 5 together, lift the piston cylinder 3 upwards, and use air pressure to blow back the blowpipe 5. The piston 4 without a sealing ring will rush upwards, and the anti-slip device 1 will prevent it from rushing out of the piston cylinder 3. At this time, the starting oblique hook 12 will automatically hook the piston 4 to prevent it from falling, because the starting rod 13 has left at this time;

[0077] Step 4. Take out the round-bottomed dry powder cup placed on the cup holder 6, clean it, place it on a scale with an accuracy of 0.01 grams, weigh the powder with a fixed weight, put it back on the cup holder 6, and cover it with the lid 14;

[0078] Step 5. Take out the heptane oil pan 9 and use a scale accurate to 0.01 gram to fix the weight;

[0079] Step 6. Extinguish fire B: Press the electric ignition button "fire B". If the temperature is not within the fixed range (usually 20±1℃), there will be no electricity. If it can be ignited, the electronic timer will start counting seconds from this moment. A fixed time standard is the number of seconds from the riser 18 to the bottom of the fire extinguisher box 16 and the piston falling. When the time is up, the timer's relay will immediately start valve B to make the riser 18 rise. When it reaches the top, it will also Figure 1 In the case of a fire, when the starting rod 13 starts the starting hook 12 to release the restriction on the piston 14, the piston 4 descends to make the air in the piston cylinder 3 compressed and blown out from the lower opening of the blowpipe; the powder blowing assembly blows the dry powder to be tested in the dry powder container through the blowpipe, so that the dust with uniform density is used to extinguish the burning object; if the fire is extinguished successfully, it is determined that the dry powder to be tested can be reused; if the fire is extinguished unsuccessfully, it is determined that the dry powder to be tested cannot be reused.

[0080] Furthermore, since the volume of the piston cylinder 3 is much smaller than that of the fire extinguishing box 16, powder will not be ejected from the four ventilation holes, and only air instead of dust will be ejected.

[0081] Step 7. To extinguish a wood Class A fire, do the same as Step 6, but insert the firewood into the firewood oblique socket 8, adjust the A button to set the timing so that when the firewood branch is half burned, the piston will fall and blow out the dust with even powder density to extinguish the fire.

[0082] The advantages of the present invention are:

[0083] The present invention can realize visual identification of the fire extinguishing performance of dry powder (expired dry powder, dry powder to be refilled, etc.), and only a very small amount of dry powder and combustible materials are required to complete the test of the dry powder performance, and the test results are accurate and highly safe.

[0084] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dry powder identification method based on a dry powder identification device, characterized in that: The dry powder identification device comprises: arranged in sequence from top to bottom: a powder blowing assembly, a dry powder container for placing dry powder, a combustion material container and a driving assembly; the dry powder container is placed in the upper part of a fire extinguishing box with a lower opening, the blowpipe of the powder blowing assembly is located above the dry powder container, and the switch of the powder blowing assembly is triggered by the driving assembly; the combustion material container is placed on a rising platform, and the rising platform is connected to the driving assembly; after weighed dry powder and combustion materials to be tested are added to the dry powder container and the combustion material container, the combustion materials are ignited, and the driving assembly drives the rising platform to move upward to close the lower opening of the fire extinguishing box, at which time the driving assembly triggers the powder blowing assembly to work; the powder blowing assembly blows away the dry powder to be tested in the dry powder container through the blowpipe to extinguish the combustion materials; if the fire is extinguished successfully, it is determined that the dry powder to be tested can be reused; if the fire is extinguished unsuccessfully, it is determined that the dry powder to be tested cannot be reused; The powder blowing assembly comprises: a piston cylinder, a piston and a starting oblique hook; the piston is placed in the vertical piston cylinder, the lower end of the piston cylinder is embedded in the cover of the fire extinguishing box, and the inner cavity of the piston cylinder is communicated with the inner cavity of the fire extinguishing box through the blow pipe; when the piston falls from top to bottom in the piston cylinder, the air in the piston cylinder is blown out through the blow pipe to blow away the dry powder to be tested in the dry powder container; the starting oblique hook is arranged at the upper part of the piston cylinder, and is used to hook the piston to be dropped; the hook part of the starting oblique hook extends into the piston cylinder through the opening of the side wall of the piston cylinder, and the driving part of the starting oblique hook is exposed to the outside; the starting When there is no external force, the driving part of the oblique hook falls and the hook part tilts upward, and the tilted hook part hooks the bottom of the piston to prevent the piston from falling; the driving assembly includes: a cylinder and a starting rod; the ejection end of the cylinder is connected to the rising platform, and the starting rod is installed on the rising platform; when the rising platform moves upward to close the lower opening of the fire extinguisher box, the starting rod lifts the driving part of the starting oblique hook, and the hook part is retracted outward, so that the starting oblique hook is free from the restriction on the piston; when the piston falls to the bottom of the piston cylinder, the piston is lifted to a preset height by reverse blowing from bottom to top and is limited by the starting oblique hook; The dry powder identification method comprises: In a closed and dry environment, measure the amount of new powder required to successfully extinguish the burning object N times; where N ≥ 5; Under the same environment, take the same amount of dry powder to be tested to extinguish the same burning material; If the fire is extinguished successfully, it is determined that the dry powder to be tested can be reused; If the fire extinguishing fails, it is determined that the dry powder to be tested cannot be reused.

2. The dry powder identification method according to claim 1, characterized in that: The humidity of the environment is lower than the humidity in the fire extinguisher bottle, and the temperature is within the national standard range.

3. The dry powder identification method according to claim 1, characterized in that: The N is 10.

4. The dry powder identification method according to claim 1, characterized in that: The combustible material is wood or heptane oil, the wood is used for identifying and extinguishing Class A fire, and the heptane oil is used for identifying and extinguishing Class B fire.

5. The identification method according to claim 1, characterized in that: The amount of new powder or the amount of dry powder to be tested is less than 1% of the total amount of dry powder in the fire extinguisher.

6. The dry powder identification method according to claim 1, characterized in that: The dry powder container comprises a dry powder cup, a cup holder and a bracket; The dry powder cup contains the dry powder to be tested, and the dry powder cup is placed on the cup holder, and the cup holder is fixed in the fire extinguishing box through the bracket.

7. The dry powder identification method according to claim 1, characterized in that: The combustion material container includes a match socket and a heptane oil pan.

Images