A new powder metering dispenser

Abstract

The application belongs to the technical field of industrial flue gas treatment, and particularly relates to a novel powder metering distributor, which comprises a powder feeding pipe, an air inlet pipe, a powder accelerating chamber, a powder metering chamber and a powder distribution chamber, flange pieces are used to connect the main components, the flange pieces comprise a first flange and a second flange, the outer wall of the first flange is provided with clamping grooves, the clamping grooves are circumferentially distributed on the outer wall of the first flange, the inner wall of the first flange is fixedly connected with a first sealing piece, and the first sealing piece is provided with a cavity. The novel powder metering distributor is preliminarily sealed by the first sealing piece and the second sealing piece, the first sealing piece is expanded by the air in the air channel being extruded by the piston rod, the sealing degree is greatly improved, the locking structure of the bolt and the nut and the one-way limiting mechanism ensure firm butt joint, the sealing failure caused by the vibration of the equipment during operation is avoided, and the powder conveying process is ensured to be free of leakage and dust raising.

Description

Technical Field

[0001] This invention relates to the field of industrial flue gas treatment technology, specifically a novel powder metering and dispensing device. Background Technology

[0002] In the field of industrial flue gas pollution control, sulfur dioxide (SO2), as one of the major air pollutants, has always been subject to strict regulation in terms of emission control. Calcium-based and sodium-based dry desulfurization technologies, with their significant advantages such as wide availability of raw materials and low operating costs, have become the preferred flue gas purification solutions for industries such as coal-fired power plants and steel smelting.

[0003] Currently, most existing powder metering and distributors use a single sealing element (such as a rubber gasket) for flange connection, which is simple and can only achieve basic sealing. Moreover, the sealing fit is greatly affected by the assembly force. At the same time, there is a lack of a dedicated anti-loosening mechanism, or only simple anti-loosening washers are used to assist in anti-loosening. During long-term operation of the equipment, the bolts and nuts are prone to loosening due to the continuous vibration generated by powder conveying, which leads to an increase in the flange connection gap. This not only affects the sealing performance, but may also cause misalignment of equipment components, reduce the stability of equipment operation, and even cause safety hazards. In view of this, we propose a new type of powder metering and distributor. Summary of the Invention

[0004] The main objective of this invention is to provide a novel powder metering and dispensing device that can solve the problems mentioned in the background section.

[0005] To achieve the above objectives, this invention proposes a novel powder metering and distributing device, comprising a powder feed pipe, an air inlet pipe, a powder acceleration chamber, a powder metering chamber, and a powder distribution chamber. The main components are connected by flanges, each including a first flange and a second flange. The outer wall of the first flange has four sets of grooves, circumferentially distributed on the outer wall of the first flange. A first sealing element is fixedly connected to the inner wall of the first flange. The first sealing element has a cavity and an air inlet. The first flange has an air passage, and the cavity, air inlet, and air passage are interconnected. The first flange and the second flange are fixed by bolts and nuts. The outer wall of the nut has a limiting groove. The powder feed pipe adopts a 45° bend and streamlined inclined pipe layout.

[0006] Preferably, the first flange is penetrated by a piston rod and slidably connected to the piston rod. There are four sets of piston rods, which are circumferentially distributed on the first flange. A return spring is provided between the piston rod and the inner wall of the first flange.

[0007] Preferably, a second sealing element is fixedly connected to the inner wall of the second flange, and a fixing element is fixedly connected to the outer wall of the second flange. There are four sets of fixing elements, which are circumferentially distributed on the outer wall of the second sealing element. The fixing elements are threadedly connected to locking elements.

[0008] Preferably, the fixing member is rotatably connected to a rotating member, the rotating member is penetrated by a limiting rod and slidably connected to the limiting rod, the limiting rod is provided in four sets and is circumferentially distributed on the rotating member, and a return spring is provided between the limiting rod and the inner wall of the rotating member.

[0009] Preferably, a pull rod is fixedly connected to the lower outer wall of the limiting rod, the pull rod passes through the rotating component and is slidably connected to the rotating component, and a protrusion is fixedly connected to the outer wall of the pull rod.

[0010] Preferably, the outer wall of the fixing member is provided with a limiting strip, the fixing member is slidably connected with a second oblique tooth sleeve, and a return spring is provided between the second oblique tooth sleeve and the inner wall of the fixing member.

[0011] Preferably, a first helical toothed sleeve is fixedly connected to the bottom outer wall of the rotating component, the first helical toothed sleeve meshes with a second helical toothed sleeve, a fixing block is fixedly connected to the outer wall of the rotating component, and an arc-shaped guide rod is fixedly connected to the outer wall of the fixing block.

[0012] Preferably, the rotating component is rotatably connected to a rotating sleeve, the rotating sleeve is slidably connected to an arc-shaped guide rod, an arc-shaped spring is provided between the inner wall of the rotating sleeve and the fixed block, and an inner sleeve is fixedly connected to the inner wall of the rotating sleeve, the inner sleeve being provided with an inclined surface.

[0013] Preferably, the powder metering chamber is equipped with a powder flow meter, and the powder distribution chamber is equipped with a flow divider plate, which is made of wear-resistant alloy.

[0014] Preferably, the air inlet pipe passes through the powder acceleration chamber and is fixedly connected to the powder acceleration chamber. One end of the air inlet pipe is fixedly connected to a jet nozzle, and the other end is connected to the output end of the air compressor.

[0015] This invention provides a novel powder metering and dispensing device. It has the following beneficial effects: (1) In this new type of powder metering and dispensing device, the flange is initially sealed by the first sealing element and the second sealing element. The piston rod compresses the air in the air passage to expand the first sealing element, which greatly improves the sealing fit. At the same time, the locking structure of the bolt and nut and the one-way limit mechanism ensure a firm connection, avoid the failure of the seal due to the vibration of the equipment operation, and ensure that there is no leakage and no dust in the powder conveying process.

[0016] (2) The new powder metering distributor uses a slot to initially position the bolt. It uses the locking and rotating parts of the limiting rod and the nut limiting slot, combined with the ratchet and pawl one-way limiting mechanism composed of the first and second helical tooth sleeves, to achieve one-way limiting of the nut. This can effectively prevent the nut from loosening during equipment operation vibration and ensure long-term stable connection of the flange.

[0017] (3) When disassembling this new type of powder metering distributor, you only need to loosen the locking part and rotate the rotating sleeve to release the limit rod on the nut. Tightening the locking part can fix the rotating sleeve to prevent misoperation. Then, you can unscrew the nut and pull out the bolt to complete the separation. The overall operation process is simple, which reduces the workload and operation difficulty of equipment maintenance and repair.

[0018] (4) The new powder metering distributor adopts a 45° elbow and streamlined inclined pipe layout for the powder feed pipeline, which has no dead corners and is not easy to accumulate material. At the same time, it relies on the high-speed jet to form negative pressure combined with gravity feeding, so that the powder is smoothly drawn into the acceleration chamber, and the gas and solid phases are fully mixed and fluidized, effectively preventing powder agglomeration, wall sticking and bridging problems, and greatly improving the stability of continuous feeding operation of the equipment.

[0019] (5) The new powder metering distributor is equipped with a powder flow meter in the powder metering chamber to collect instantaneous and cumulative flow in real time. The system can automatically and dynamically adjust the compressed air intake pressure according to the flow signal to achieve the matching of air pressure and powder flow rate. When the flow rate fluctuates, the air pressure responds and corrects quickly, which greatly improves the powder metering accuracy and feeding uniformity and stability. (6) This new type of powder metering distributor uses a wear-resistant alloy flow divider plate inside the powder distribution chamber to symmetrically distribute the airflow of powder. It is paired with two outlet pipes of the same diameter, length and resistance in a symmetrical arrangement. The flow rate deviation between the two outlet pipes is very small. The flow divider plate is resistant to erosion, does not deform or shift, and does not have flow deviation phenomenon after long-term use. It can reliably meet the requirements of uniform spraying at two spray points. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the flange component of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of structure A in the middle; Figure 4 This is a schematic diagram of the three-dimensional structure of the first flange of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the three-dimensional structure of the first flange of the present invention. Figure 2 ; Figure 6 This is a three-dimensional structural diagram of the second flange of the present invention; Figure 7 This is a schematic diagram of a portion of the three-dimensional structure of the present invention; Figure 8 This is a schematic diagram of the three-dimensional cross-sectional structure of the fastener of the present invention; Figure 9 This is a three-dimensional structural diagram of the rotating component and the first helical tooth sleeve of the present invention; Figure 10 This is a schematic diagram of the internal structure of the rotating sleeve of the present invention; Figure 11 This is a schematic diagram of the rotating three-dimensional cross-sectional structure of the present invention; Figure 12 This is a schematic diagram of the second helical tooth sleeve structure of the present invention; Figure 13 This is a schematic diagram of the three-dimensional structure of the nut of the present invention; Figure 14 This is a schematic diagram of the internal structure of the powder metering chamber of the present invention; Figure 15 This is a schematic diagram of the internal structure of the powder distribution chamber of the present invention; Figure 16 This is a schematic diagram of the internal structure of the powder acceleration chamber of the present invention.

[0022] Explanation of icon numbers: 1. Powder feed pipe; 2. Air inlet pipe; 21. Air nozzle; 3. Powder acceleration chamber; 4. Powder metering chamber; 41. Powder flow meter; 5. Powder distribution chamber; 51. Flow divider; 6. Flange; 61. First flange; 611. Slot; 612. First seal; 613. Cavity; 614. Air inlet; 615. Air passage; 616. Piston rod; 62. Second flange; 6201. Second seal 6202, Fixing component; 6203, Locking component; 6204, Rotating component; 6205, Limiting rod; 6206, Limiting strip; 6207, Rotating sleeve; 6208, First helical tooth sleeve; 6209, Second helical tooth sleeve; 6210, Pull rod; 6211, Protrusion; 6212, Fixing block; 6213, Arc-shaped guide rod; 6214, Inner sleeve; 63, Bolt; 64, Nut; 641, Limiting groove.

[0023] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-16 This invention proposes a novel powder metering and distributing device, comprising a powder feed pipe 1, an air inlet pipe 2, a powder acceleration chamber 3, a powder metering chamber 4, and a powder distribution chamber 5. The main components are connected by flanges 6. The air inlet pipe 2 passes through the powder acceleration chamber 3 and is fixedly connected to the powder acceleration chamber 3. One end of the air inlet pipe 2 is fixedly connected to a jet nozzle 21, and the other end is connected to the output end of an air compressor. The powder metering chamber 4 is equipped with a powder flow meter 41, and the powder distribution chamber 5 is equipped with a flow divider 51. Air is supplied by an air compressor through the air inlet pipe 2 and then through the jet nozzle 21 to the powder acceleration chamber 3. The airflow forms a high-speed jet in the powder acceleration chamber 3, creating a negative pressure zone in the feed inlet area. Under the dual action of negative pressure suction and gravity conveying, the powder is actively drawn into the powder acceleration chamber 3. The powder feed pipe 1 adopts a streamlined arrangement with a 45° bend and a feed inclined pipe, with no dead corners and no material accumulation. The gas and solid phases are fully mixed and fluidized in the acceleration chamber, avoiding powder agglomeration, wall adhesion, and bridging. The powder metering chamber 4 has a built-in powder flow meter 41, which collects the instantaneous and cumulative flow of powder in real time. The flow data is output and displayed in real time. The system automatically adjusts the compressed air intake pressure according to the real-time flow signal. The intake pressure and powder flow are dynamically matched in proportion to maintain the stability of the gas-solid two-phase flow. When the flow fluctuates, the air pressure responds and adjusts quickly to ensure high metering accuracy and stable material supply. The gas-solid two-phase flow from the outlet of powder metering chamber 4 smoothly enters powder distribution chamber 5. A flow divider 51 is installed in powder distribution chamber 5. The flow divider 51 divides the mixed flow into two streams with symmetrical and equal cross sections, ensuring that the two streams have the same resistance and flow rate. At the same time, the flow divider 51 is made of wear-resistant alloy, which will not deform, deviate, or produce flow deviation after long-term scouring. The two outlet pipes are symmetrically arranged, and the outlet pipe diameter, length, and resistance are exactly the same, ultimately achieving a very small deviation in the discharge flow rate of the two streams, meeting the requirements of uniform spraying at dual spray points.

[0026] In an embodiment of the present invention, in order to improve the sealing performance between flanges 6, specifically, flange 6 includes a first flange 61 and a second flange 62. The outer wall of the first flange 61 is provided with a groove 611, and there are four sets of grooves 611 distributed circumferentially on the outer wall of the first flange 61. A first sealing element 612 is fixedly connected to the inner wall of the first flange 61. The first sealing element 612 has a cavity 613 and an air inlet 614. The first flange 61 has an air passage 615. The cavity 613, the air inlet 614 and the air passage 615 are interconnected. The first flange 61 is penetrated by the piston rod 616 and is slidably connected to the piston rod 616. There are four sets of piston rods 616, which are circumferentially distributed on the first flange 61. A return spring is provided between the piston rod 616 and the inner wall of the first flange 61. The second flange 62 is fixedly connected to the inner wall of the second flange 62. The first flange 61 and the second flange 62 are fixed by bolts 63 and nuts 64. A limit groove 641 is opened on the outer wall of the nut 64. Furthermore, a fixing member 6202 is fixedly connected to the outer wall of the second flange 62. There are four sets of fixing members 6202, which are circumferentially distributed on the outer wall of the second sealing member 6201. The fixing member 6202 is threadedly connected to a locking member 6203. The fixing member 6202 is rotatably connected to a rotating member 6204. The rotating member 6204 is penetrated by a limiting rod 6205 and slidably connected to the limiting rod 6205. There are four sets of limiting rods 6205, which are circumferentially distributed on the rotating member 6204. A return spring is provided between the limiting rod 6205 and the inner wall of the rotating member 6204. Furthermore, a pull rod 6210 is fixedly connected to the lower outer wall of the limiting rod 6205. The pull rod 6210 passes through the rotating member 6204 and is slidably connected to the rotating member 6204. A protrusion 6211 is fixedly connected to the outer wall of the pull rod 6210. A limiting strip 6206 is provided on the outer wall of the fixing member 6202. A second helical tooth sleeve 6209 is slidably connected to the fixing member 6202. A return spring is provided between the second helical tooth sleeve 6209 and the inner wall of the fixing member 6202. Furthermore, a first helical toothed sleeve 6208 is fixedly connected to the bottom outer wall of the rotating component 6204, the first helical toothed sleeve 6208 meshes with a second helical toothed sleeve 6209, a fixed block 6212 is fixedly connected to the outer wall of the rotating component 6204, an arc-shaped guide rod 6213 is fixedly connected to the outer wall of the fixed block 6212, a rotating sleeve 6207 is rotatably connected to the rotating component 6204, the rotating sleeve 6207 is slidably connected to the arc-shaped guide rod 6213, an arc-shaped spring is provided between the inner wall of the rotating sleeve 6207 and the fixed block 6212, and an inner sleeve 6214 is fixedly connected to the inner wall of the rotating sleeve 6207, the inner sleeve 6214 is provided with a slope. In this invention, during normal operation of the powder conveying equipment, the powder material enters the equipment through the powder feed pipe 1, and airflow is introduced through the air inlet pipe 2, forming a stable and uniform flow field in the powder acceleration chamber 3. This causes the powder material to accelerate uniformly under the action of the flow field, and then enters the powder metering chamber 4 for precise metering. The metered powder material is then conveyed to the powder distribution chamber 5 for quantitative distribution to meet subsequent processing requirements. The main sections of the equipment are quickly sealed and connected via flanges 6, ensuring no leakage and no dust generation during powder conveying.

[0027] When installing and connecting flange 6, firstly, align and fit the first flange 61 and the second flange 62 coaxially, ensuring that their central axes coincide. Simultaneously, ensure that the first sealing element 612 on the first flange 61 and the second sealing element 6201 on the second flange 62 are tightly abutted to achieve initial sealing. Then, insert the bolts 63 sequentially through the corresponding through holes of the first flange 61 and the second flange 62, ensuring that the head of the bolt 63 is precisely engaged in the groove 611 on the first flange 61, achieving initial positioning of the bolts 63 and preventing rotation.

[0028] After bolt 63 is positioned, nut 64 is placed on the other end of bolt 63, and then nut 64 is tightened. Since nut 64 and bolt 63 are connected by threads, nut 64 will move along the axial direction of bolt 63 towards the first flange 61 during rotation. After nut 64 has moved a certain distance, its end face contacts the limiting rod 6205 and applies a squeezing force to the limiting rod 6205 during continuous rotation, forcing the limiting rod 6205 to retract into the rotating part 6204. At the same time, the return spring on one side of the limiting rod 6205 is compressed, undergoes elastic deformation, and stores elastic potential energy.

[0029] Continue turning the nut 64. When the limiting groove 641 on the nut 64 precisely aligns with the end of the limiting rod 6205, the compressive force of the return spring disappears. Under the rebound force of the return spring, the limiting rod 6205 automatically springs into the limiting groove 641, achieving initial linkage between the nut 64 and the rotating component 6204. Continue turning the nut 64. Because the limiting rod 6205 is engaged in the limiting groove 641, the limiting groove 641 applies a circumferential force to the limiting rod 6205, causing the rotating component 6204 to rotate synchronously with the nut 64, and the nut 64 gradually moves closer to the rotating component 6204.

[0030] When the rotating component 6204 rotates, the first helical toothed sleeve 6208, which is fixedly connected to its bottom, rotates synchronously. The inclined surface of the first helical toothed sleeve 6208 applies a compressive force to the inclined surface of the second helical toothed sleeve 6209, forcing the second helical toothed sleeve 6209 to move axially along the limiting strip 6206, causing the second helical toothed sleeve 6209 to briefly disengage from the first helical toothed sleeve 6208. At the same time, the return spring connected to the second helical toothed sleeve 6209 is compressed and undergoes elastic deformation. When the first helical toothed sleeve 6208 rotates to the next tooth position, the compressive force of the first helical toothed sleeve 6208 on the second helical toothed sleeve 6209 disappears, and the second helical toothed sleeve 6209, under the rebound force of its connected return spring, re-engages with the first helical toothed sleeve 6208. During this process, the first helical toothed sleeve 6208, the second helical toothed sleeve 6209, and the return spring together form a ratchet and pawl one-way limiting mechanism, which can achieve one-way limiting of the nut 64 and prevent the nut 64 from loosening during equipment operation vibration.

[0031] Continuously tighten the nut 64 until its end face gradually approaches the outer wall of the rotating component 6204, until they are completely aligned. Continue tightening the nut 64; as it is now restricted by the rotating component 6204, it cannot rotate further. At this point, the bolt 63 will move towards the second flange 62 under the force of the thread, until the outer wall of the bolt 63 head is tightly fitted against the outer wall of the first flange 61. Through the combined clamping force of the bolt 63 and the nut 64, the first flange 61 and the second flange 62 are securely locked, achieving a sealed connection of the main body of the equipment. The coordinated design of the limiting rod 6205, the limiting groove 641, the rotating component 6204, the first helical toothed sleeve 6208, and the second helical toothed sleeve 6209 reliably limits the nut 64 in one direction, further ensuring the stability of the flange connection and preventing the nut 64 from loosening and causing sealing failure.

[0032] like Figure 4 As shown, the piston rod 616 is disposed inside the slot 611. When the bolt 63 moves toward the second flange 62, the head of the bolt 63 contacts the end of the piston rod 616 and applies a compressive force to the piston rod 616. When the piston rod 616 is compressed, it moves axially toward the inside of the first flange 61, and at the same time, the return spring on one side of the piston rod 616 is compressed and undergoes elastic deformation. During the movement of the piston rod 616, it applies a compressive force to the air in the air passage 615 inside the first flange 61, causing the air in the air passage 615 to enter the cavity 613 of the first seal 612 through the air inlet 614. The first seal 612 expands slightly under the action of gas pressure. Through this expansion, the first seal 612 and the second seal 6201 can fit more tightly, greatly improving the sealing performance of the flange 6 and preventing powder leakage or airflow loss.

[0033] When it is necessary to disassemble flange 6 and separate the main body of the equipment, first loosen the locking part 6203 to release the limit on the rotating sleeve 6207; then rotate the rotating sleeve 6207. During the rotation of the rotating sleeve 6207, the arc spring inside is compressed and undergoes elastic deformation. When the rotating sleeve 6207 rotates, the inner sleeve 6214 fixedly connected to its inner wall rotates synchronously. The inclined surface designed on the inner sleeve 6214 will apply a compressive force to the protrusion 6211 on the pull rod 6210, forcing the pull rod 6210 to drive the limit rod 6205 to retract into the rotating part 6204.

[0034] When the rotating sleeve 6207 rotates 30 degrees, the limiting rod 6205 completely disengages from the limiting groove 641 on the nut 64, and the limiting function of the nut 64 is completely released. Then, tighten the locking component 6203 to lock and fix the rotating sleeve 6207, preventing the rotating sleeve 6207 from resetting and causing the limiting rod 6205 to re-enter the limiting groove 641. At this point, the nut 64 can be turned in the opposite direction to unscrew the bolt 63, and then the bolt 63 can be pulled out of the through holes of the first flange 61 and the second flange 62, thus separating the first flange 61 and the second flange 62 and completing the disassembly of flange 6. Furthermore, the design of the locking component 6203 and the arc spring reliably limits the rotation of the rotating sleeve 6207, preventing it from accidentally rotating under external vibrations, collisions, or other influences, which could then pull the pull rod 6210, causing the limiting rod 6205 to disengage from the limiting groove 641, ensuring the stability of the flange connection during equipment operation.

[0035] The signal interaction of each component adopts the PLC control protocol commonly used in industrial equipment, which is common knowledge to those skilled in the art and can be implemented without further detailed description. The control logic and signal interaction method are existing technologies and will not be described in detail. The standard parts used in this application can all be purchased from the market. The specific connection methods of each part are all connected by conventional methods such as riveting and welding that are mature in the existing technology. The standard parts are all of conventional models in the existing technology, and the circuit connection adopts conventional connection methods in the existing technology.

[0036] It should be noted that the above electrical components are all existing technology products. They are selected, installed and debugged by those skilled in the art according to the needs of use to ensure that all electrical appliances can work normally. The components are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here.

[0037] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A novel powder metering and distributing device, comprising a powder feed pipe (1), an air inlet pipe (2), a powder acceleration chamber (3), a powder metering chamber (4), and a powder distribution chamber (5), wherein the main components are connected by flanges (6), characterized in that: The flange (6) includes a first flange (61) and a second flange (62). The outer wall of the first flange (61) is provided with a groove (611). There are four sets of grooves (611) and they are distributed circumferentially on the outer wall of the first flange (61). The inner wall of the first flange (61) is fixedly connected to a first sealing element (612). The first sealing element (612) has a cavity (613) and an air inlet (614). The first flange (61) has an air passage (615). The cavity (613), the air inlet (614), and the air passage (615) are interconnected. The first flange (61) and the second flange (62) are fixed by bolts (63) and nuts (64). The outer wall of the nut (64) has a limiting groove (641).

2. The novel powder metering and dispensing device according to claim 1, characterized in that: The first flange (61) is penetrated by the piston rod (616) and slidably connected to the piston rod (616). There are four sets of piston rods (616) distributed circumferentially on the first flange (61). A return spring is provided between the piston rod (616) and the inner wall of the first flange (61).

3. The novel powder metering and dispensing device according to claim 1, characterized in that: The inner wall of the second flange (62) is fixedly connected to a second sealing element (6201), and the outer wall of the second flange (62) is fixedly connected to a fixing element (6202). There are four sets of fixing elements (6202), which are circumferentially distributed on the outer wall of the second sealing element (6201). The fixing element (6202) is threadedly connected to a locking element (6203).

4. A novel powder metering and dispensing device according to claim 3, characterized in that: The fixing member (6202) is rotatably connected to the rotating member (6204). The rotating member (6204) is penetrated by the limiting rod (6205) and slidably connected to the limiting rod (6205). There are four sets of limiting rods (6205) distributed circumferentially on the rotating member (6204). A return spring is provided between the limiting rod (6205) and the inner wall of the rotating member (6204).

5. A novel powder metering and dispensing device according to claim 4, characterized in that: A pull rod (6210) is fixedly connected to the lower outer wall of the limiting rod (6205). The pull rod (6210) passes through the rotating part (6204) and is slidably connected to the rotating part (6204). A protrusion (6211) is fixedly connected to the outer wall of the pull rod (6210).

6. A novel powder metering and dispensing device according to claim 3, characterized in that: The outer wall of the fixing member (6202) is provided with a limiting strip (6206), and the fixing member (6202) is slidably connected with a second helical tooth sleeve (6209). A return spring is provided between the second helical tooth sleeve (6209) and the inner wall of the fixing member (6202).

7. A novel powder metering and dispensing device according to claim 5, characterized in that: The bottom outer wall of the rotating component (6204) is fixedly connected to a first helical tooth sleeve (6208), which meshes with a second helical tooth sleeve (6209). The outer wall of the rotating component (6204) is fixedly connected to a fixing block (6212), and the outer wall of the fixing block (6212) is fixedly connected to an arc-shaped guide rod (6213).

8. A novel powder metering and dispensing device according to claim 7, characterized in that: The rotating component (6204) is rotatably connected to a rotating sleeve (6207), the rotating sleeve (6207) is slidably connected to an arc-shaped guide rod (6213), an arc-shaped spring is provided between the inner wall of the rotating sleeve (6207) and the fixed block (6212), and an inner sleeve (6214) is fixedly connected to the inner wall of the rotating sleeve (6207), the inner sleeve (6214) is provided with an inclined surface.

9. A novel powder metering and dispensing device according to claim 1, characterized in that: The powder metering chamber (4) is equipped with a powder flow meter (41), and the powder distribution chamber (5) is equipped with a flow divider (51).

10. A novel powder metering and dispensing device according to claim 1, characterized in that: The air intake pipe (2) passes through the powder acceleration chamber (3) and is fixedly connected to the powder acceleration chamber (3). One end of the air intake pipe (2) is fixedly connected to the jet nozzle (21), and the other end is connected to the output end of the air compressor.

Images