A fire extinguisher dry powder production batching device and use method thereof

Abstract

The present invention proposes a fire extinguisher dry powder production batching device and a use method thereof, which relate to the field of batching technology, and include a support frame placed on a horizontal plane, and two groups of batching units placed on the support frame, wherein the batching unit includes two mixing tanks fixedly connected to the support frame, the top of the mixing tank is connected to a main material tank, and one side of the main material tank is provided with a plurality of auxiliary material tanks connected to the mixing tank, and a connecting pipe is coaxially fixed to the bottom of the mixing tank; through the arrangement of a wind tube, a diaphragm pump, a blocking net and a mixing motor, compared with other mechanical structures such as an auger and blades, the present invention fully combines the good flow characteristics of powdered materials, the interior of the mixing tank is funnel-shaped, and a good up and down turning material circulation system can be formed, and at the same time, the main material and the auxiliary material can also be better mixed in the ascending part, which greatly improves the mixing effect of the main material and the auxiliary material.

Description

Technical Field

[0001] The invention relates to the technical field of batching, in particular to a batching device for producing dry powder of a fire extinguisher and a use method thereof. Background Art

[0002] A dry powder fire extinguisher is a portable fire-fighting device filled with dry powder fire extinguishing agent, which usually contains ammonium phosphate or other chemical components and has good fluidity and dryness. Dry powder fire extinguishing agent is a mixture of inorganic salts and additives that have been crushed and dried. It can effectively interrupt the chemical reaction during the combustion process and cover the burning material to prevent oxygen from contacting, thereby achieving the effect of extinguishing the fire.

[0003] A Chinese patent with application number CN202321254796.4 discloses a batching device for dry powder mixing production, including a cylinder, which is rotatably connected to a fixed frame, a stirring rod and a feed port extending into the cylinder are provided on the top of the cylinder, the stirring rod is driven to rotate by a drive motor installed on the upper part of the cylinder, the stirring rod is provided with stirring blades and a spiral stirring auger, a discharge port is provided at the bottom of the cylinder, a cylinder wall spiral auger is provided on the inner wall of the cylinder, and a vibration motor is also provided on the outer wall of the cylinder, which solves the problem that uneven mixing of premixed materials in the prior art affects the quality of subsequent products, and the existing equipment has serious dust during mixing, resulting in a poor working environment, and the quality of the next round of mixing is affected by incomplete unloading.

[0004] However, the above patent still has the following problems for the batching equipment of dry powder fire extinguishing agent:

[0005] 1. The main components of dry powder fire extinguishing agent can be summarized as main material and auxiliary material. The main material is different according to the type of dry powder fire extinguisher, but the auxiliary material is basically a flow aid or moisture-proof agent. In order to prevent the dry powder fire extinguishing agent from caking during the batching stage, it is necessary not only to add auxiliary materials for assistance, but also to ensure the uniformity of mixing the auxiliary materials and the main materials. The existing mixing method adopts the form of up and down turning to improve the mixing degree, but the means of up and down turning basically adopts dragon blades or self-rotating stirring disks, which not only has low mixing efficiency, but also easily has dead corners for turning, resulting in uneven mixing of the main material and the auxiliary material.

[0006] 2. Although flow aids or moisture-proof agents are added to the main ingredients, a small amount of agglomeration is inevitable during the mixing process. At the same time, in the production process of dry powder fire extinguishing agent, screening is required after mixing to remove larger particles and agglomerates. The existing mixing equipment does not have the function of screening and adjusting the particle size. Summary of the invention

[0007] In view of the above problems, the present invention provides a fire extinguisher dry powder production batching device and a use method thereof, which has the advantages of high mixing efficiency of main materials and auxiliary materials, less dust agglomeration and relatively uniform particle size of the output material.

[0008] The technical solution is that the present invention comprises a support frame placed on a horizontal plane, characterized in that it also comprises:

[0009] A mixing device, the mixing device is arranged on the support frame, the mixing device comprises two mixing units arranged on the left and right, the mixing unit comprises a mixing tank fixedly connected to the support frame, and a rotating shaft is coaxially connected inside the mixing tank;

[0010] A negative pressure circulation device, comprising an air cylinder located inside a mixing tank, the air cylinder being coaxially arranged with a rotating shaft, a diaphragm pump being fixedly connected to the top of the mixing tank, an input end of the diaphragm pump being fixedly connected with an input pipe, the input pipe being sealingly rotatably connected with the top of the rotating shaft, a negative pressure groove being coaxially provided on the rotating shaft, a plurality of negative pressure holes being circumferentially provided on the outer wall of the rotating shaft and being connected with the negative pressure groove, an output end of the diaphragm pump being fixedly connected with an output pipe, an end of the output pipe being away from the diaphragm pump being connected with the mixing tank and away from the axis of the mixing tank;

[0011] A stirring unit, the stirring unit is coaxially arranged inside the mixing tank, and the stirring unit comprises a plurality of stirring rods uniformly distributed around the circumference;

[0012] The abrasive unit is located inside the negative pressure circulation device and is used to unify the particle size of the material.

[0013] Preferably, a main material tank connected to the mixing tank is arranged on the top of the mixing tank, a plurality of auxiliary material tanks connected to the mixing tank are arranged on one side of the main material tank, a mixing motor is fixed on the top of the mixing tank, the mixing motor is connected to the rotating shaft through a gear transmission structure, a connecting pipe is coaxially fixed to the bottom of the mixing tank, and a solenoid valve is arranged in the connecting pipe.

[0014] Preferably, the air duct includes a suction and pressure part and a rising part, the diameter of the suction and pressure part is larger than the diameter of the rising part, a plurality of discharge ports located below the blocking net are opened on the side wall of the suction and pressure part, a blocking net located below the negative pressure hole is coaxially fixed in the suction and pressure part, the blocking net is an inverted funnel-shaped structure, an annular connecting frame is coaxially fixed on the rotating shaft, and the stirring rod is fixedly connected to the connecting frame.

[0015] Preferably, a plurality of wedge blocks distributed at equal intervals are coaxially fixed on the inner wall of the rising portion, and the plurality of wedge blocks separate the rising portion into a plurality of diffusers and throats evenly distributed up and down, the inner diameter of the throat is smaller than the inner diameter of the diffuser, and the throat is penetrated by a plurality of circumferentially evenly distributed through holes; a plurality of annular blocks located in the diffuser are fixed to the outer wall of the rotating shaft, and a connecting hole connected to the negative pressure groove is provided inside the annular block.

[0016] Preferably, an annular collecting bucket is arranged between the suction and pressure part and the rising part, a filter hole is opened at the bottom of the collecting bucket, a connecting ring located below the blocking net is coaxially fixed on the rotating shaft, a plurality of circumferentially evenly distributed scraping strips are fixed on the connecting ring, and the scraping strips are in contact with the bottom of the blocking net and the side wall of the collecting bucket.

[0017] Preferably, the stirring unit also includes a plurality of arc-shaped bars arranged at the bottom of the connecting frame, the arc-shaped bars are in contact with the outer wall of the wind tube, the plurality of stirring rods are fixedly connected to the corresponding arc-shaped bars, and the same scraper is fixed to one end of the plurality of stirring rods away from the arc-shaped bars, and the scraper is in contact with the inner wall of the mixing tank.

[0018] Preferably, a filter plate is coaxially fixed to one end of the rising portion away from the pumping and pressing portion, a plurality of circumferentially evenly distributed air inlet holes are opened at the bottom of the rising portion, and a guide plate located above the air inlet holes is coaxially fixed to the bottom of the rising portion.

[0019] Preferably, the abrasive unit also includes a plurality of sieve plates located inside the collecting bucket, the sieve plates are fixed equidistantly to the inner wall of the collecting bucket up and down, a plurality of grinding discs evenly distributed up and down are fixed to the end of the scraper bar away from the connecting ring, the grinding discs and the sieve plates are staggered up and down, and leakage holes are respectively opened on the plurality of grinding discs and the sieve plates, and the diameter of the leakage holes gradually decreases from top to bottom.

[0020] Preferably, a plurality of stirring rods are fixed to one end of the rotating shaft away from the mixing motor, and the stirring rods are located below the filter plate.

[0021] A method for using a fire extinguisher dry powder production batching device comprises the following steps:

[0022] Step 1: Add the main material and auxiliary material into the corresponding main material tank and auxiliary material tank respectively;

[0023] Step 2: Open the valve at the bottom of the main material tank, start the spiral quantitative conveying equipment at the bottom of the auxiliary material tank, and put the main material and auxiliary material into the mixing tank respectively;

[0024] Step 3: Start the mixing motor and the diaphragm pump to stir the materials in the mixing tank and turn the materials in the mixing tank up and down;

[0025] Step 4: After the mixing is completed, open the valve inside the connecting pipe and put the mixed material into the filling equipment below.

[0026] Compared with the existing known technologies, the technical solution provided by the present invention has at least the following significant effects:

[0027] 1. Compared with other mechanical structures such as auger blades, the air cylinder, diaphragm pump, barrier net and mixing motor are set up, which fully combines the good flow characteristics of powdered materials. The interior of the mixing tank is funnel-shaped. As long as the diaphragm pump continues to work, the material at the bottom will move into the air cylinder under the action of negative pressure, forming a good up and down material circulation system. At the same time, the main material and the auxiliary material can be better mixed in the rising part, which greatly improves the mixing effect of the main material and the auxiliary material.

[0028] 2. By setting the wedge block, Bernoulli's principle is utilized. When a large rising airflow is formed in the rising part, the speed of the airflow passing through the throat is significantly greater than the speed of the diffuser. At this time, the material in the middle is affected by the negative pressure and enters the rising part through the through hole. At the same time, due to the filling height limit of the material, some through holes are located above the material. The negative pressure airflow generated by these through holes will attract the dust floating above the material, preventing the generation of large dust in the mixing tank, thereby avoiding the generation of a large amount of static electricity.

[0029] 3. Through the settings of sieve plates, grinding discs and leak holes, when the dust particles pass through the top sieve plate and enter the movable gap formed by the first grinding disc and the sieve plate, the dust particles are further finely ground and moved back and forth until the dust particles meet the passing requirements of the filter holes. This setting not only further reduces or even avoids the dust agglomeration phenomenon, but also enables the mixing equipment to have the function of uniform particle size. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0031] Figure 2 It is a schematic diagram of the coordination of the mixing tank and the connecting piece in the present invention.

[0032] Figure 3 It is a three-dimensional cross-sectional view of the mixing tank and the connecting piece in the present invention.

[0033] Figure 4 It is a three-dimensional cross-sectional view of the air duct in the present invention.

[0034] Figure 5 It is a schematic diagram of the cooperation between the wind tube and the rotating shaft in the present invention.

[0035] Figure 6 It is a schematic diagram of the coordination of the connecting frame and the rotating shaft in the present invention.

[0036] Figure 7 It is a three-dimensional schematic diagram of the rotating shaft in the present invention.

[0037] Figure 8 It is a schematic diagram of the cooperation between the grinding disc and the screen plate in the present invention.

[0038] Fig. 9 It is a schematic diagram of the connecting ring and the connecting member in the present invention.

[0039] Explanation of the symbols in the schematic diagram:

[0040] 1. Support frame; 2. Mixing tank; 3. Main material tank; 4. Auxiliary material tank; 5. Connecting pipe; 6. Mixing motor; 7. Air cylinder; 8. Rotating shaft; 9. Pumping and pressure part; 10. Rising part; 11. Diaphragm pump; 12. Blocking net; 14. Connecting frame; 17. Wedge block; 18. Diffuser; 19. Throat; 20. Through hole; 21. Collecting bucket; 22. Negative pressure hole; 23. Connecting ring; 24. Scraper bar; 25. Arc bar; 26. Stirring rod; 27. Scraper; 28. Filter plate; 29. ​​Guide plate; 30. Sieve plate; 31. Grinding disc; 32. Stirring rod; 33. Ring block; 34. Connecting hole. DETAILED DESCRIPTION

[0041] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0042] refer to Figures 1 to 3 As shown, a fire extinguisher dry powder production batching device includes a support frame 1 placed on a horizontal plane, the support frame 1 includes a support platform and support legs fixed below the support platform; it also includes a mixing unit, a negative pressure circulation device, a stirring unit and an abrasive unit; the mixing unit is arranged on the support frame 1, the mixing unit includes two mixing units arranged on the left and right, and the mixing unit includes a mixing tank 2 fixedly connected to the support frame 1; the negative pressure circulation device is arranged on the mixing tank 2, and is used to pump the materials in the middle and lower layers of the mixing tank 2 to the upper layer; the stirring unit is coaxially arranged inside the mixing tank 2, and the stirring unit includes a plurality of stirring rods 26 evenly distributed around the circumference; the abrasive unit is located inside the negative pressure circulation device, and is used to adjust the particle size of the material.

[0043] refer to Figure 1 and Figure 2As shown, the mixing unit also includes a main material tank 3 connected to the top of the mixing tank 2. In this embodiment, the mixing tank 2 is a funnel-shaped structure. The top of the mixing tank 2 is connected to the main material tank 3. One side of the main material tank 3 is provided with a plurality of auxiliary material tanks 4 connected to the mixing tank 2. A spiral quantitative conveying device is provided below the auxiliary material tank 4 to control the amount of auxiliary material added. The spiral quantitative conveying device is a prior art and will not be described in detail here; the interior of the mixing tank 2 is coaxially connected to a rotating shaft 8, a mixing motor 6 is fixed to the top of the mixing tank 2, and the mixing motor 6 is connected to the rotating shaft 8 through a gear transmission structure. A connecting pipe 5 is coaxially fixed to the bottom of the mixing tank 2, and the connecting pipe 5 passes through a horizontal plane. A filling device is provided at the end; it is necessary to supplement the filling device. According to different production methods, some equipment directly adopts a feed pipe with a built-in solenoid valve, and a conveyor belt and a clamp are provided below the feed pipe. Fire extinguisher bottles are placed on the conveyor belt at equal intervals, and the clamp clamps the fire extinguisher bottles. When the fire extinguisher bottle reaches the bottom of the feed pipe, the discharge amount of the fire extinguishing agent is controlled by controlling the conduction time of the solenoid valve. In some cases, the fire extinguisher bottle is replaced with a container bag. The production methods are different, and the containers carrying the fire extinguishing agent are different. The above methods are all prior arts and will not be described in detail here. A solenoid valve is provided in the connecting pipe 5, and the solenoid valve is used to control the discharge of the mixing tank 2.

[0044] refer to Figures 3 to 5As shown, the main components of dry powder fire extinguishing agent can be summarized as main material and auxiliary material. The main material varies according to the type of dry powder fire extinguisher, but the auxiliary material is basically a flow aid or a moisture-proof agent. In order to prevent the dry powder fire extinguishing agent from caking during the batching stage, it is necessary not only to add auxiliary materials for assistance, but also to ensure the uniformity of mixing the auxiliary materials and the main materials. The existing mixing method adopts the form of up and down flipping to improve the mixing degree, but the means of up and down flipping basically adopts dragon blades or self-rotating stirring disks, which not only has low mixing efficiency, but also easily has dead corners for flipping, resulting in uneven mixing of the main material and the auxiliary material. In order to solve the above problems, the negative pressure circulation device also includes a wind tube 7 located inside the mixing tank 2, the wind tube 7 is coaxially arranged with the rotating shaft 8, the wind tube 7 includes a suction and pressure part 9 and a rising part 10, the diameter of the suction and pressure part 9 is larger than the diameter of the rising part 10, a negative pressure groove is coaxially opened on the rotating shaft 8, and a plurality of negative pressure holes 22 connected with the negative pressure groove are opened on the circumference of the outer wall of the rotating shaft 8. A diaphragm pump 11 is fixedly connected to the top of the mixing tank 2. The diaphragm pump 11 is a prior art and will not be described in detail here; the input end of the diaphragm pump 11 is fixedly connected to an input pipe, and the input pipe is sealingly and rotatably connected to the top of the rotating shaft 8, and the output end of the diaphragm pump 11 is fixedly connected to an output pipe, and the end of the output pipe away from the diaphragm pump 11 is connected to the mixing tank 2. The material tank 2 is connected and away from the axis of the mixing tank 2. This arrangement is to transport the material in the inner circle of the mixing tank 2 to the outer circle of the mixing tank 2, forming a good material circulation system, which is convenient for the combination of the main material and the auxiliary material; a blocking net 12 located below the negative pressure hole 22 is coaxially fixed in the pumping and pressing part 9, which is used to block the rising material. The blocking net 12 is an inverted funnel-shaped structure, and a plurality of discharge ports located below the blocking net 12 are opened on the side wall of the pumping and pressing part 9. The material passes through the restriction of the blocking net 12, and the flowing airflow impacts the bottom of the blocking net 12. With the assistance of the funnel-shaped structure of the blocking net 12, the rising material is ejected through the discharge port, thereby achieving the purpose of turning the mixing tank 2 up and down. A ring-shaped connecting frame 14 is coaxially rotated on the inner wall of the mixing tank 2, and the stirring rod 26 is fixedly connected to the connecting frame 14. Through the arrangement of the air cylinder 7, the diaphragm pump 11, the blocking net 12 and the mixing motor 6, when the diaphragm pump 11 is started, a large negative pressure is formed in the rising part 10, and the material at the bottom of the mixing tank 2 enters the suction and pressure part 9 through the rising part 10, and a part of the material is restricted by the blocking net 12, and the material at the bottom is ejected through the discharge port. Compared with other mechanical structures such as auger blades, the above method fully combines the good flow characteristics of powdered materials. Combined with the assistance of the stirring rod 26, the interior of the mixing tank 2 is funnel-shaped, and the material at the bottom continuously gathers to one side of the air cylinder 7, forming a good up and down turning material circulation system. At the same time, the main material and the auxiliary material can also be better mixed in the rising part 10, which greatly improves the mixing effect of the main material and the auxiliary material.

[0045] refer to Figures 4 to 7As shown, in order to further enhance the suction effect of the air duct 7, a plurality of equally spaced wedge blocks 17 are coaxially fixed on the inner wall of the riser 10. The wedge blocks 17 are annular structures with a trapezoidal cross section. After small agglomerated dust enters the riser 10, it will collide with the wedge blocks 17 to achieve the effect of crushing the agglomerates. The plurality of wedge blocks 17 separate the riser 10 into a plurality of diffusers 18 and throats 19 evenly distributed up and down. The inner diameter of the throat 19 is smaller than that of the diffuser 18. The throat 19 is penetrated by a plurality of circumferentially evenly distributed through holes 20. A plurality of annular blocks 33 located in the diffuser 18 are fixed to the outer wall of the rotating shaft 8. A connecting hole 34 connected to the negative pressure groove is opened inside the annular block 33. The arrangement of the wedge block 17 utilizes Bernoulli's principle, that is, the pressure is small where the flow rate is large. The Venturi tube can be referred to. When a large rising airflow is formed in the rising part 10, the speed of the airflow through the throat 19 is significantly greater than the speed of the diffuser 18. At this time, the material in the middle is affected by the negative pressure and enters the rising part 10 through the through hole 20. At the same time, due to the filling height limit of the material, some through holes 20 are located above the material. The negative pressure airflow generated by these through holes 20 will attract the dust floating above the material to prevent the generation of large dust in the mixing tank 2, thereby avoiding the generation of a large amount of static electricity. It should be noted that the material is mainly divided into two parts during the rising process. One part passes through the rising part 10 to reach the pumping part 9, passes through the restriction of the blocking net 12, and is ejected from the discharge port on one side of the pumping part 9. The other part passes through the connecting hole 34 into the interior of the rotating shaft 8, passes through the input pipe, the diaphragm pump 11 and the output pipe to reach the outer circle of the mixing tank 2.

[0046] refer to Figures 5 to 9 As shown, considering that when the material is directly ejected through the discharge port of the pumping and pressing part 9, a large amount of dust will be generated, causing a large amount of static electricity to be generated inside the mixing tank 2. At the same time, when the material contacts the blocking net 12, part of the material may continue to contact the blocking net 12 under negative pressure conditions, affecting the internal wind force of the rising part 10. An annular collecting bucket 21 is provided between the pumping and pressing part 9 and the rising part 10. A filter hole is provided at the bottom of the collecting bucket 21. The diameter of the filter hole is consistent with the dust particle size of the fire extinguishing agent. A connecting ring located below the blocking net 12 is coaxially fixed on the rotating shaft 8. 23, a plurality of scraping strips 24 evenly distributed around the circumference are fixed on the connecting ring 23, the scraping strips 24 are in contact with the bottom of the blocking net 12 and the side wall of the collecting bucket 21, and through the arrangement of the collecting bucket 21, the connecting ring 23 and the scraping strips 24, when the scraping strips 24 rotate with the rotating shaft 8, the scraping strips 24 can clean the bottom of the blocking net 12 to prevent the material from clogging the blocking net 12, and at the same time, the scraped material falls into the collecting bucket 21, and the dust particles that meet the specifications fall downward through the filter holes, thereby reducing or even avoiding the large dust flying phenomenon in the mixing tank 2.

[0047] refer to Figure 3 , Figure 5 and Figure 8As shown, since the dust particles have good fluidity, when the material on the side wall of the air duct 7 enters the interior of the rising part 10 through the through hole 20, dust is easily accumulated around the through hole 20, resulting in the through hole 20 being blocked, affecting the working effect of the air duct 7. For this reason, a plurality of arc-shaped bars 25 evenly distributed around the circumference are fixed at the bottom of the connecting frame 14. The arc-shaped bars 25 are in contact with the outer wall of the air duct 7. The plurality of arc-shaped bars 25 can form a complete cylindrical structure in a circumferentially distributed manner. A plurality of stirring rods 26 are fixedly connected to the corresponding arc-shaped bars 25. The stirring rods 26 are of a spiral structure with an inclination angle spirally upward. When the stirring rods 26 rotate, the materials on the edge of the mixing tank 2 can be more smoothly gathered to the axis center. The ends of the plurality of stirring rods 26 away from the arc-shaped bars 25 are fixed with the same scraper 27. The scraper 27 It contacts the inner wall of the mixing tank 2 and is used to clean the inner wall of the mixing tank 2 to prevent dust from accumulating on the inner wall of the mixing tank 2, making it inconvenient to mix and clean. Through the arrangement of the arc strip 25, the stirring rod 26 and the scraper 27, when the rotating shaft 8 rotates, the arc strip 25 cleans the outer wall of the air tube 7 and moves the material on the side of the through hole 20 to prevent it from agglomerating and accumulating. At the same time, the arc strip 25 rotates with the arc strip 25, and the material on the edge of the mixing tank 2 gradually gathers toward the axis to prevent the occurrence of mixing dead corners.

[0048] refer to Figure 3 and Figure 4 As shown, although a flow aid or moisture-proof agent is added to the main material, a small amount of agglomeration is unavoidable during the mixing process. At the same time, in the production process of dry powder fire extinguishing agent, screening is required after the mixing is completed to screen out larger particles and agglomerates. The existing mixing equipment does not have the function of screening and adjusting the particle size. In order to solve the above problems, a filter plate 28 is coaxially fixed to one end of the rising part 10 away from the pumping part 9, a plurality of air inlet holes evenly distributed around the circumference are opened at the bottom of the rising part 10, and a guide plate 29 located above the air inlet hole is coaxially fixed to the bottom of the rising part 10. The guide plate 29 is a trumpet-shaped structure, which is convenient for adsorbing more bottom materials. One end of the scraper 27 contacts the upper surface of the filter plate 28. When the scraper 27 rotates with the rotating shaft 8, the end of the scraper 27 can also hit the larger agglomerates below the guide plate 29 until they become smaller agglomerates and enter the collecting bucket 21 under the action of suction.

[0049] refer to Figure 8 and Fig. 9As shown, considering that the filter holes below the collecting hopper 21 can only pass dust particles with a diameter that meets the requirements, during use, some dust particles that do not meet the requirements are gathered in the collecting hopper 21, some of which are larger dust particles, and some of which are agglomerates formed by dust particles. In order to further process the materials in the collecting hopper 21, the abrasive unit also includes a plurality of sieve plates 30 located inside the collecting hopper 21, and the sieve plates 30 are fixed equidistantly to the inner wall of the collecting hopper 21, and a plurality of grinding discs 31 evenly distributed up and down are fixed to the end of the scraper strip 24 away from the connecting ring 23, and the grinding discs 31 and the sieve plates 30 are staggered up and down. A movable gap is formed between the grinding disc 31 and the sieve plate 30, and leakage holes are respectively opened on the multiple grinding discs 31 and the sieve plate 30, and the diameter of the leakage holes gradually decreases from top to bottom. Through the settings of the sieve plate 30, the grinding disc 31 and the leakage holes, when the dust particles pass through the uppermost sieve plate 30 and enter the movable gap formed by the first grinding disc 31 and the sieve plate 30, the dust particles are further finely ground, and then reciprocate downward until the dust particles meet the passing requirements of the filter hole. This arrangement not only further reduces or even avoids the dust agglomeration phenomenon, but also enables the mixing equipment to have the function of uniform particle size.

[0050] refer to Figure 3 and Figure 6 As shown, in order to further supplement the material below the filter plate 28 , a plurality of stirring rods 32 are fixed to one end of the rotating shaft 8 away from the mixing motor 6 . The stirring rods 32 are located below the filter plate 28 and are used to mix the main material and auxiliary material at the bottom of the mixing tank 2 .

[0051] It should be further noted that the mixing tank 2, the main material tank 3 and the auxiliary material tank 4 are respectively provided with static elimination devices. In this embodiment, the static elimination device adopts ionization equipment, such as an ion rod or an ion emitter.

[0052] A method for using a fire extinguisher dry powder production batching device comprises the following steps:

[0053] Step 1: The main material and auxiliary material of the fire extinguishing agent are respectively added into the mixing tank 2 through the main material tank 3 and the auxiliary material tank 4. The adding ratio of the main material to the auxiliary material is adjusted according to the actual production needs.

[0054] Step 2: Start the mixing motor 6 and the diaphragm pump 11, a large negative pressure is formed in the rising part 10, and the material at the bottom of the mixing tank 2 enters the pumping part 9 through the rising part 10. After being restricted by the blocking net 12, the scraper 24 can clean the bottom of the blocking net 12 to prevent the material from clogging the blocking net 12.

[0055] Step 3: The scraped material falls into the collecting hopper 21, and the dust particles that meet the specifications fall downward through the filter holes. With the assistance of the stirring rod 26, the interior of the mixing tank 2 is like an hourglass, and the material at the bottom will continuously gather to one side of the air duct 7, forming a good up and down material circulation system.

[0056] Step 4: When the dust particles pass through the uppermost sieve plate 30 and enter the movable gap formed by the first grinding disc 31 and the sieve plate 30, the dust particles are further refined and ground, reciprocating downward until the dust particles meet the passing requirements of the filter holes.

[0057] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A fire extinguisher dry powder production batching device, comprising a support frame (1) placed on a horizontal surface, characterized in that: Also includes: A mixing device, the mixing device being arranged on a support frame (1), the mixing device comprising two mixing units arranged on the left and right, the mixing unit comprising a mixing tank (2) fixedly connected to the support frame (1), the interior of the mixing tank (2) being coaxially rotatably connected to a rotating shaft (8); A negative pressure circulation device, comprising a wind tube (7) located inside a mixing tank (2), the wind tube (7) being coaxially arranged with a rotating shaft (8), a diaphragm pump (11) being fixedly connected to the top of the mixing tank (2), an input end of the diaphragm pump (11) being fixedly connected with an input pipe, the input pipe being sealingly rotatably connected to the top of the rotating shaft (8), a negative pressure groove being coaxially provided on the rotating shaft (8), a plurality of negative pressure holes (22) being circumferentially provided on the outer wall of the rotating shaft (8) and being connected with the negative pressure groove, an output end of the diaphragm pump (11) being fixedly connected with an output pipe, an end of the output pipe being away from the diaphragm pump (11) being connected with the mixing tank (2) and away from the axis of the mixing tank (2); A stirring unit, the stirring unit being coaxially arranged inside the mixing tank (2), the stirring unit comprising a plurality of stirring rods (26) evenly distributed around the circumference; An abrasive unit, the abrasive unit is located inside the negative pressure circulation device and is used to unify the particle size of the material; The air cylinder (7) comprises a suction and pressure part (9) and a rising part (10), the diameter of the suction and pressure part (9) is larger than the diameter of the rising part (10), a plurality of discharge ports located below the blocking net (12) are provided on the side wall of the suction and pressure part (9), a blocking net (12) located below the negative pressure hole (22) is coaxially fixed in the suction and pressure part (9), the blocking net (12) is an inverted funnel-shaped structure, an annular connecting frame (14) is coaxially fixed on the rotating shaft (8), and the stirring rod (26) is fixedly connected to the connecting frame (14); A plurality of wedge-shaped blocks (17) are coaxially fixed on the inner wall of the rising portion (10) and are distributed at equal intervals. The plurality of wedge-shaped blocks (17) divide the rising portion (10) into a plurality of diffusers (18) and throats (19) that are evenly distributed vertically. The inner diameter of the throat (19) is smaller than the inner diameter of the diffuser (18). The throat (19) is penetrated by a plurality of through holes (20) that are evenly distributed around the circumference. A plurality of annular blocks (33) located in the diffuser (18) are fixed to the outer wall of the rotating shaft (8), and a connecting hole (34) communicating with the negative pressure groove is formed inside the annular block (33); An annular collecting bucket (21) is arranged between the suction and pressure portion (9) and the rising portion (10), and a filter hole is provided at the bottom of the collecting bucket (21). A connecting ring (23) located below the blocking net (12) is coaxially fixed to the rotating shaft (8), and a plurality of scraping strips (24) evenly distributed around the circumference are fixed to the connecting ring (23), and the scraping strips (24) are in contact with the bottom of the blocking net (12) and the side wall of the collecting bucket (21).

2. A fire extinguisher dry powder production batching device according to claim 1, characterized in that: The mixing unit further comprises a main material tank (3) connected to the top of the mixing tank (2); a plurality of auxiliary material tanks (4) connected to the mixing tank (2) are arranged on one side of the main material tank (3); a mixing motor (6) is fixed to the top of the mixing tank (2); the mixing motor (6) is connected to the rotating shaft (8) via a gear transmission structure; a connecting pipe (5) is coaxially fixed to the bottom of the mixing tank (2); a solenoid valve is arranged in the connecting pipe (5).

3. A fire extinguisher dry powder production batching device according to claim 2, characterized in that: The stirring unit further comprises a plurality of arc-shaped bars (25) arranged at the bottom of the connecting frame (14), the arc-shaped bars (25) being in contact with the outer wall of the air cylinder (7), the plurality of stirring rods (26) being fixedly connected to corresponding arc-shaped bars (25), and the same scraper (27) being fixed to one end of the plurality of stirring rods (26) away from the arc-shaped bars (25), and the scraper (27) being in contact with the inner wall of the mixing tank (2).

4. A fire extinguisher dry powder production batching device according to claim 3, characterized in that: A filter plate (28) is coaxially fixed to one end of the rising portion (10) away from the suction and pressure portion (9), a plurality of air inlet holes evenly distributed around the circumference are formed at the bottom of the rising portion (10), and a guide plate (29) located above the air inlet holes is coaxially fixed to the bottom of the rising portion (10).

5. A fire extinguisher dry powder production batching device according to claim 4, characterized in that: The abrasive unit further comprises a plurality of sieve plates (30) located inside the collecting hopper (21), the sieve plates (30) being fixed equidistantly to the inner wall of the collecting hopper (21) in the upper and lower parts, a plurality of grinding discs (31) evenly distributed in the upper and lower parts are fixed to one end of the scraper bar (24) away from the connecting ring (23), the grinding discs (31) and the sieve plates (30) being arranged alternately in the upper and lower parts, the plurality of grinding discs (31) and the sieve plates (30) being respectively provided with leakage holes, the diameters of the leakage holes gradually decreasing from top to bottom.

6. A fire extinguisher dry powder production batching device according to claim 5, characterized in that: A plurality of stirring rods (32) are fixed to one end of the rotating shaft (8) away from the mixing motor (6), and the stirring rods (32) are located below the filter plate (28).

7. A method for using a batching device for producing dry powder for fire extinguisher, wherein the method uses the batching device for producing dry powder for fire extinguisher as claimed in claim 6 for batching, characterized in that: The following steps are involved: Step 1: Add the main material and auxiliary material into the corresponding main material tank (3) and auxiliary material tank (4) respectively; Step 2: Open the valve at the bottom of the main material tank (3), start the spiral quantitative conveying device at the bottom of the auxiliary material tank (4), and put the main material and auxiliary material into the mixing tank (2) respectively; Step 3: starting the mixing motor (6) and the diaphragm pump (11) to stir the material in the mixing tank (2) and to turn the material in the mixing tank (2) up and down; Step 4: After the mixing is completed, open the valve inside the connecting pipe (5) and put the mixed material into the filling equipment below.

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