A gas backflushing anti-clogging atomizing spray disc and an atomizing pulverizer

Abstract

The present application relates to the technical field of gas atomization powder production, and particularly relates to a gas back-blowing anti-blocking atomization spray disc and an atomization powder production device. The atomization spray disc comprises a lower disc and an upper disc, the upper disc is provided with a melt drop channel penetrating in the vertical direction, a gas chamber and an annular gap are formed between the lower disc and the upper disc, and the atomization spray disc further comprises an elastic reset mechanism. The upper disc and the lower disc are in sliding sealing cooperation, one of the upper disc and the lower disc is a fixing part for being fixed to a rack, and the other is a sliding part. During powder production, the upper disc and the lower disc keep a relative position through the elastic reset mechanism, and the inner edge height of the lower end opening of the annular gap is not higher than the outer edge height. When metal melt drops are adhered to the melt drop channel, the gas pressure in the gas chamber increases, the sliding part overcomes the elastic force of the elastic reset part and slides back to the fixing part, so that the inner edge height of the lower end opening of the annular gap is higher than the outer edge height. In this way, the metal melt drops adhered to the melt drop channel can be removed by gas back-blowing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas atomization powder production, in particular to a gas back-blowing anti-blocking atomizing spray disc and an atomizing powder production device. BACKGROUND

[0002] The atomizing spray disc is a core component of a gas atomization powder production device, such as Figure 1 Fig. 1 is a structural schematic diagram of an atomizing spray disc in the prior art, which comprises a fixedly connected upper disc 2 and lower disc 1, and the upper disc 2 and the lower disc 1 are sealingly fitted. The lower disc 1 comprises a fixedly and sealingly connected intermediate disc body 11 and a lower disc body 12. The upper disc 2 is provided with a melt drop passage 4 penetrating in the vertical direction. The upper disc 2 and the lower disc 1 enclose a gas chamber 3 and an annular gap 5 therebetween, and the lower end opening diameter of the annular gap 5 is smaller than the upper end opening diameter. The lower disc 1 is further provided with a gas passage 6 for connecting the gas chamber 3 and a gas source. The annular gap 5 is used for connecting the gas chamber 3 and the melt drop passage 4. The gas source is used for supplying high-pressure low-speed inert gas to the gas chamber 3. The annular gap 5 uses the principle of a Laval nozzle to accelerate the high-pressure low-speed gas into low-pressure high-speed gas, and blows it to an atomizing area F. The metal melt drops 7 fall through the melt drop passage 4 to the atomizing area F and are atomized into powder.

[0003] In order to avoid the gas flow blown out of the annular gap 5 generating a horizontal or oblique component, causing the gas flow to blow the metal melt drops 7 upward and affecting the atomization effect, in actual design, as shown in Figure 1 2 The inner edge height of the lower end opening of the annular gap 5 is not higher than the outer edge height, that is, the height of the first edge 51 is not higher than the height of the second edge 52, and the gas flow direction angle is the included angle between the edges 1 and 2 and the horizontal line. At this time, the gas flow direction angle is less than or equal to 0°. In this way, the gas flow can be blown to the atomizing area F, avoiding upward reflux.

[0004] In actual work, when the metal solution passes through the melt drop passage 4 under the action of gravity, due to the machining precision of the transmission device, the gas flow disturbance above the spray disc and the magnetic field disturbance of the induction heating coil, the slightly shaking of the melted rod material is caused. At this time, it is impossible to guarantee that all the metal melt drops 7 fall along the center of the melt drop passage 4. When the metal melt drops 7 deviate, part of the melt drops will be adhered to the surface of the melt drop passage 4. With the continuous smelting, the adhered metal melt drops 7 in the melt drop passage 4 will be more and more, and the metal melt drops 7 that can fall will be less and less, eventually causing the melt drop passage 4 to be blocked, causing the device to fail.

[0005] In the prior art, when the melt drop passage 4 is blocked, the vacuum condition and the inert gas atmosphere of the atomizing powder production device need to be broken, the upper disc 2 needs to be replaced, and then the device needs to be vacuumed and filled with inert gas. The whole process is time-consuming and laborious, and seriously affects the production efficiency.​ SUMMARY

[0006] The technical problem solved by the present application is to provide a gas back-blowing anti-clogging atomizing spray disc and atomizing pulverizer, by sliding sealing cooperation between the upper disc and the lower disc and setting elastic reset structure, when metal droplets are adhered in the droplet passage, the sliding part slides relative to the fixed part, so that the inner edge height of the lower end opening of the annular gap is higher than the outer edge height, at this time the airflow blows out from the lower end opening of the annular gap and generates a transverse or oblique upward component, the upward airflow reflects in the droplet passage to generate upward backflow, the upward backflow can blow away the metal droplets adhered to the inner surface of the droplet passage to the upper vacuum chamber, avoiding more and more adhered metal droplets to completely block the droplet passage, so that the cleaning of the adhered metal droplets can be completed without breaking the vacuum condition and inert gas atmosphere of the atomizing pulverizer.

[0007] To solve the above technical problem, the technical solution provided by the present application is a gas back-blowing anti-clogging atomizing spray disc, comprising a lower disc and an upper disc, the upper disc is provided with a vertical through droplet passage, the lower disc and the upper disc form a gas chamber and an annular gap therebetween, the gas chamber is used for communicating with a gas source, the annular gap is used for communicating the gas chamber and the droplet passage, further comprising an elastic reset mechanism, the upper disc and the lower disc are slidingly sealed together, and one of the upper disc and the lower disc is a fixed part for fixing with a rack, and the other is a sliding part, during pulverizing, the upper disc and the lower disc maintain relative position by the elastic reset mechanism, and the inner edge height of the lower end opening of the annular gap is not higher than the outer edge height, when metal droplets are adhered in the droplet passage, the gas pressure in the gas chamber increases, the sliding part slides against the fixed part to make the inner edge height of the lower end opening of the annular gap higher than the outer edge height.

[0008] Further, the elastic reset mechanism comprises a spring support arranged on the side of the sliding part away from the fixed part, and an elastic part arranged between the spring support and the sliding part, the spring support is fixedly connected to the fixed part.

[0009] Further, the elastic part is arranged in multiple in the circumferential direction.

[0010] Further, the fixed part is the lower disc, and the sliding part is the upper disc.

[0011] Further, the droplet passage is a converging structure with gradually increasing inner diameter from the middle part upward and downward to the two opening ends.

[0012] Further, the converging structure is smoothly transitioned at the converging part.

[0013] Further, the profile line of the longitudinal section of the converging structure is arc-shaped.

[0014] Further, the upper end of the converging structure is arranged close to the upper end opening of the molten droplet passage.

[0015] Further, the upper disc comprises an upper disc body and a feeding cylinder fixedly sleeved on the upper disc body, and an inner hole of the feeding cylinder constitutes the molten droplet passage.

[0016] To solve the above technical problems, the present application further provides a kind of atomization powder preparation device, including frame, atomization spray disc is installed on frame, further including for the gas supply of atomization spray disc, atomization spray disc is gas back flushing anti-blocking atomization spray disc, including lower disc and upper disc, the molten droplet passage of being arranged along vertical through on the upper disc, the gas chamber and annular gap are enclosed between the lower disc and the upper disc, the gas chamber is used to communicate with gas source, the annular gap is used to communicate gas chamber and molten droplet passage, further including elastic reset mechanism, the sliding sealing cooperation between the upper disc and the lower disc, and one of the upper disc and the lower disc is used to be fixed with fixed part of frame, and the other is sliding part, when powder is prepared, the relative position of the upper disc and the lower disc is kept by elastic reset mechanism, and the inner edge height of the lower end opening of annular gap is not higher than its outer edge height, when metal droplet is adhered in molten droplet passage, gas chamber increases, and the sliding part is slid against fixed part to make the inner edge height of the lower end opening of annular gap higher than its outer edge height by overcoming the elastic force of elastic reset part.

[0017] Further, the elastic reset mechanism includes spring support arranged on the side of sliding part against fixed part, and elastic part arranged between spring support and sliding part, and the spring support is fixedly connected on fixed part.

[0018] Further, the elastic part is arranged in multiple along circumferential direction.

[0019] Further, the fixed part is lower disc, and the sliding part is upper disc.

[0020] Further, the molten droplet passage is converging structure gradually expanding along middle part upward, lower opening end inner diameter.

[0021] Further, the converging structure is smoothly transitioned at its converging part.

[0022] Further, the profile line of longitudinal section of converging structure is arc-shaped.

[0023] Further, the upper end of the converging structure is arranged close to the upper end opening of the molten droplet passage.

[0024] Further, the upper disc comprises an upper disc body and a feeding cylinder fixedly sleeved on the upper disc body, and an inner hole of the feeding cylinder constitutes the molten droplet passage.

[0025] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0026] (1) By slidingly sealing the upper disc and the lower disc, and setting the elastic reset mechanism, the height of the inner edge of the lower end opening of the annular gap is not higher than the height of the outer edge, so that the airflow blown from the annular gap can completely blow to the atomization area, and there is no horizontal and inclined component, avoiding the upward reflux of the airflow, and affecting the atomization effect. When the metal droplet is adhered to the droplet passage, by increasing the gas pressure, the pressure in the gas chamber is increased, the sliding member slides back to the fixed member against the elastic force of the elastic reset member, so that the height of the inner edge of the lower end opening of the annular gap is higher than the height of the outer edge, at this time, the direction angle of the airflow is greater than or equal to 0°, the airflow blown from the lower end opening of the annular gap will produce horizontal and inclined components, and under the refraction of the inner wall of the droplet passage, upward reflux will be generated, under the action of the reflux gas, the metal droplet adhered to the inner wall of the droplet passage will be peeled off and blown to the upper vacuum chamber. In this way, the reflux airflow which is not conducive to atomization is utilized, when the metal droplet adheres to the droplet passage, the vacuum condition and inert gas atmosphere of the atomization device do not need to be broken, the cleaning of the adhered metal droplet can be completed, the cost is reduced, the service life of the atomization device is ensured, and the production cost is reduced.

[0027] (2) The droplet passage is set to a converging structure with a small inner diameter in the middle and large inner diameters on both sides, the airflow velocity at the converging portion will be increased, and the falling speed of the metal droplet will be faster, reducing the probability of metal droplet adhesion in the droplet passage. At the same time, when the metal droplet adheres to the droplet passage, the sliding member slides, generating upward reflux, and the reflux airflow will also accelerate at the converging portion, facilitating the peeling of the adhered metal droplet.

[0028] (3) The converging structure is smoothly transitioned at the converging portion, and the profile line of the longitudinal section of the converging structure is arc-shaped, so that when the metal droplet falls off, the droplet can fall on the large diameter above the converging portion, so that the metal droplet can fall along the curved surface, reducing the probability of metal droplet adhesion and the probability of droplet passage blockage.

[0029] (4) The converging portion of the converging structure is arranged close to the upper end opening of the droplet passage, so that the arc of the arc from the converging portion to the upper end opening is larger, and the metal droplet falling thereon can easily slide off.

[0030] (5) The upper disc is designed in a split body, so that when the feeding cylinder is damaged during long-term use, it can be replaced without replacing the entire upper disc, reducing the difficulty and cost of disassembly and assembly.

[0031] (6) The sliding member is the upper disc, so that the spring support is arranged above the upper disc, facilitating assembly. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic diagram of an atomizing spray disc in the prior art.

[0033] Figure 2 is Figure 1 is an enlarged view of A in

[0034] Figure 3 is a structural schematic diagram of an atomizing pulverizer (the frame is not shown) in embodiment 1 of the present application.

[0035] Figure 4 is a structural schematic diagram of an atomizing spray disc in pulverizing in embodiment 1 of the present application.

[0036] Figure 5 is a structural schematic diagram of an atomizing spray disc in removing the metal droplets adhered on the droplet channel in embodiment 1 of the present application.

[0037] In the figure: 1, lower disc; 11, intermediate disc body; 12, lower disc body; 2, upper disc; 21, upper disc body; 22, feeding cylinder; 3, gas chamber; 4, droplet channel; 5, annular gap; 51, first edge; 52, second edge; 6, gas channel; 7, metal droplet; 8, elastic reset structure; 81, spring support; 82, spring; 83, fixed column; 9, gas source; 91, pressure regulating valve; 92, pressure gauge; 93, safety valve; 94, ball valve; 10, adhered metal droplet.

[0038] F, atomizing area; S, gas flow direction; a, gas flow direction angle. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts, fall within the scope of protection of the present application.

[0041] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0042] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0043] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0044] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "set", "mount", "connected", "connected" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] The present application will be described in further detail below with reference to the accompanying drawings: Specific embodiment 1:

[0047] Reference Figures 3 to 5 The atomizing pulverizer of the present application comprises a rack (not shown in the figure), an atomizing spray disc is installed on the rack, and a gas source 9 for supplying gas to the atomizing spray disc. In the present embodiment, the atomizing spray disc is specifically a gas backflushing anti-blocking atomizing spray disc (hereinafter referred to as an atomizing spray disc).

[0048] The atomizing spray disc comprises a lower disc 1 and an upper disc 2, the upper disc 2 is provided with a molten drop passage 4 penetrating in the vertical direction, a gas chamber 3 and an annular gap 5 are formed between the lower disc 1 and the upper disc 2, the gas chamber 3 is used for communicating with the gas source 9, and the annular gap 5 is used for communicating the gas chamber 3 with the molten drop passage 4. It also comprises an elastic reset mechanism 8, the upper disc 2 and the lower disc 1 are in sliding sealing cooperation, in the present embodiment, the lower disc 1 is a fixed part fixedly connected with the rack, and the upper disc 2 is a sliding part capable of sliding relative to the lower disc 1.

[0049] When the powder is made, the force generated by the gas flowing into the gas chamber 3 from the gas source 9 is smaller than the pressing force of the elastic reset member acting on the upper disc 2, the upper disc 2 is pressed on the lower disc 1 by the elastic reset mechanism 8, and the relative positions of the two are maintained, and at this time, the inner edge height of the lower end opening of the annular gap 5 is not smaller than the outer edge height, that is, as shown in Figure 4 the height of the first rib 51 is not higher than the height of the second rib 52, and the direction of the airflow after blowing out of the annular gap 5 is obliquely downward, all towards the atomization area F, without horizontal and oblique components, avoiding the problem of metal droplets 7 backflowing into the vacuum chamber above the nozzle disc, ensuring that the metal droplets 7 can normally fall, and ensuring the powder making effect. In this embodiment, the height of the first rib 51 is the same as the height of the second rib 52 during powder making, and the two are in the same horizontal plane, and the airflow direction angle a at this time is 0°. Of course, in other embodiments, the height of the first rib 51 can be lower than the height of the second rib 52 during powder making, and the airflow direction angle a at this time is less than 0°.

[0050] Due to the influence of the machining precision of the transmission device, the airflow disturbance above the nozzle disc, and the magnetic field disturbance of the induction heating coil, the molten rod slightly shakes, and the metal droplets 7 stick to the droplet channel 4. At this time, the falling of the metal droplets 7 is stopped, the gas pressure of the gas source 9 is increased, and the pressure of the gas source 9 acting in the gas chamber 3 is greater than the force of the elastic reset mechanism 8 acting on the upper disc 2. At this time, the upper disc 2 overcomes the elastic force of the elastic reset mechanism 8 and slides upward relative to the lower disc 1 along the vertical direction, until the inner edge height of the lower end opening of the annular gap 5 is higher than the outer edge height, that is, the height of the first rib 51 is greater than the height of the second rib 52, and at this time, the airflow direction angle a is greater than 0°, and the airflow generates horizontal and oblique components. Under the refraction of the inner wall of the droplet channel 4, the component backflows upward, the backflowing gas blows the metal droplets 7 sticking to the droplet channel 4, causing them to peel off, and driving the peeled metal droplets 7 to move upward into the upper vacuum chamber, completing the cleaning of the adhered metal droplets 7, avoiding the blockage of the droplet channel 4 by the metal droplets 7, and affecting the normal use of the atomization powder making device.

[0051] Specifically, as shown in Figure 3 in this embodiment, the lower disc 1 includes a fixedly connected intermediate disc body 11 and a lower disc body 12, the lower end of the intermediate disc body 11 is provided with a stepped surface, the upper end of the lower disc body 12 is provided with a flange matched with the stepped surface, the lower disc body 12 is fixedly sleeved on the lower end of the intermediate disc body 11 through the flange, and a sealing ring is arranged at the connection between the two to achieve sealing.

[0052] The upper disc 2 comprises an upper disc body 21 and a feeding cylinder 22 fixedly sleeved on the upper disc body 21, and an inner hole of the feeding cylinder 22 constitutes the droplet passage 4. Specifically, an annular notch extending in the radial direction is arranged at an upper portion of a central hole of the upper disc body 21, and an upper end of the feeding cylinder 22 is provided with an annular flange matched with the annular notch. In this way, the upper disc 2 is designed in two parts, so that when the feeding cylinder 22 is damaged during long-term use, the feeding cylinder 22 can be replaced without replacing the entire upper disc 2, thereby reducing the difficulty and cost of disassembly and assembly.

[0053] A stepped structure matched with an outer circumferential surface of the upper disc body 21 is arranged at an upper end of the intermediate disc body 11, the upper disc body 21 is sleeved in the stepped structure to achieve the sliding fit connection of the two, and an annular groove is arranged on the outer circumferential surface of the upper disc body 21, and a sealing ring is arranged in the annular groove, the sealing ring is pressed between the intermediate disc body 11 and the upper disc body 21 to achieve the sliding sealing fit of the upper disc 2 and the lower disc 1.

[0054] The intermediate disc body 11, the lower disc body 12 and the upper disc 2 surround the gas chamber 3, an outer circumferential surface of the feeding cylinder 22 and the lower disc body 12 surround the annular gap 5, and an opening diameter of a lower end of the annular gap 5 is smaller than that of an upper end, so that the gas flow direction S flowing out of the lower end of the annular gap 5 is obliquely downward to blow toward the atomization area F.

[0055] As shown in Figure 4 The elastic return mechanism 8 comprises spring supports 81 arranged on a side of the upper disc 2 away from the lower disc 1. In the embodiment, the spring supports 81 are inverted L-shaped structures composed of vertical segments and horizontal segments, lower ends of the vertical segments are fixedly installed on the intermediate disc body 11 of the lower disc 1, the horizontal segments extend inward, and elastic members are arranged between the horizontal segments and the upper disc body 21 of the upper disc 2. In the embodiment, the elastic members are springs 82, fixed columns 83 extending upward are fixedly arranged on the upper end surface of the upper disc body 21 at positions corresponding to the springs 82, the fixed columns 83 are arranged in the interiors of the springs 82 to guide the extension and contraction of the springs 82, and a distance between the fixed columns 83 and bottom surfaces of the horizontal segments of the spring supports 81 is not greater than a sliding distance of the upper disc 2 when the gas flow needs to blow the adhered metal droplets 10. Of course, in other embodiments, the elastic members can be leaf springs.

[0056] In the embodiment, the spring supports 81 are arranged in an array in the circumferential direction, and a spring 82 is arranged between each spring support 81 and the upper disc 2, so that the six springs 82 are arranged in an array in the circumferential direction. In this way, when the powder is prepared, the pressing force of the elastic return mechanism 8 on the upper disc 2 can uniformly act on the upper disc 2, and when the upper disc 2 needs to slide upward, the elastic return mechanism 8 can ensure that the upper disc 2 slides in the vertical direction to avoid sliding interference caused by tilting.

[0057] Of course, in other embodiments, the number of springs 82 can be set as needed, such as 2, 3, 5, 8, etc., while ensuring stable operation, and the spring seat 81 is arranged at the corresponding position of the spring 82. In other embodiments, only one spring 82 can be provided, and the inner diameter of the spring 82 is larger than the inner diameter of the droplet passage 4, and the spring 82 is coaxially arranged above the droplet passage 4. Of course, in other embodiments, the spring seat 81 can also be a cylindrical structure, and the lower end of the cylindrical structure is fixed on the middle disc, and the upper end is fixedly installed with a circular ring-shaped plate, and a plurality of springs 82 are arranged between the circular ring-shaped plate and the upper disc 2. Of course, in other embodiments, the plurality of springs 82 can also be arranged only at intervals when meeting the actual needs.

[0058] Preferably, in the present embodiment, as shown in Figure 5 , the droplet passage 4 is a converging structure with the inner diameter gradually increasing from the middle upward and downward to the two opening ends. And the converging structure is smoothly transitioned at the converging part, and the profile line of the longitudinal section of the converging structure is arc-shaped.

[0059] In this way, the airflow velocity at the converging part is accelerated, the falling metal droplet 7 has a faster speed, and the probability of the metal droplet 7 adhering to the droplet passage 4 is reduced. At the same time, when the metal droplet 7 adheres to the droplet passage 4, the upper disc 2 slides upward to generate upward backflow, and the backflow gas flow is accelerated when it is blown back at the converging part, which facilitates the peeling of the adhered metal droplet 10. And when the metal droplet 7 falls off-center, the droplet can fall above the large-diameter part of the converging part of the converging structure, so that the metal droplet 7 can fall along the curved surface, reducing the probability of the metal droplet 7 adhering to the droplet passage 4 and reducing the probability of the droplet passage 4 being blocked.

[0060] Preferably, in the present embodiment, the converging part of the converging structure is arranged close to the upper end opening of the droplet passage 4, so that the arc of the arc shape from the converging part to the upper end opening is larger, and the metal droplet 7 falling thereon is easy to slide off.

[0061] In the present embodiment, as shown in Figure 3 , a gas passage 6 is arranged on the middle disc body 11, and the gas passage 6 communicates the gas source 9 with the gas chamber 3. The gas source 9 includes a gas station, a pressure regulating valve 91, a pressure gauge 92, a safety valve 93, and a ball valve 94.

[0062] In the present embodiment, the compression force of the elastic return mechanism 8 is matched with the gas pressure in the gas chamber 3 during powder making, that is, the compression force is greater than the gas pressure, so as to ensure that the upper disc 2 is always pressed on the lower disc 1 during powder making. The limit pressure of the gas delivered by the gas source 9 into the gas chamber 3 is greater than the compression force of the elastic return mechanism 8 when the edge 1 is higher than the edge 2, so as to ensure that the upper disc 2 can slide upward to the specified position.

[0063] The use process of the atomizing powder making device of the present application is as follows:

[0064] When the powder is made, the upper disc 2 is pressed on the lower disc 1 by the elastic reset mechanism 8, the metal droplet 7 falls and is atomized into powder in the atomization area F.

[0065] When the worker finds that the metal droplet 7 is adhered to the droplet channel 4, the metal droplet 7 stops falling, the air pressure is increased by the pressure regulating valve 91, the air pressure in the gas chamber 3 is increased and the upper disc 2 slides upward against the pressing force of the elastic reset mechanism 8, when the inner edge of the lower end opening of the annular gap 5 is higher than the outer edge, the air flow blown from the annular gap 5 generates an upward backflow, the backflow air flow blows and peels off the adhered metal droplet 10, and the cleaning of the adhered metal droplet 10 is completed, when the cleaning is completed, the air pressure is reduced by the pressure regulating valve 91, the spring 82 reset mechanism presses the upper disc 2 to slide downward, and the upper disc 2 is pressed on the lower disc 1 again to continue the atomization and powder making.

[0066] In this way, the treatment is carried out at the initial stage of the adhesion of the metal droplet 7 to the droplet channel 4, and the possibility of further adhesion and accumulation of the metal droplet 7 is eliminated, at the same time, the whole air flow backflow blowing process does not need to open the furnace, the production efficiency is improved, the service life of the upper disc 2 and the atomization and powder making device is ensured, and the production cost is reduced.

[0067] Embodiment 2: The embodiment provides a different sliding part and a fixed part, which is different from embodiment 1, in the embodiment, the upper disc is a fixed part fixed with the rack, and the lower disc is a sliding part, at this time, the elastic reset mechanism is arranged on one side of the lower disc, specifically, the spring support is an L-shaped mechanism, the vertical section of the L-shaped structure is fixed on the upper disc, the horizontal section extends inward and is arranged below the lower disc, and the spring is arranged between the upper end of the horizontal section and the lower disc, so that the lower disc is pressed on the upper disc, when it is necessary to clean the metal droplet adhered to the droplet channel, the air source increases the air pressure, the lower disc overcomes the spring force and slides downward, so that the lower end opening of the annular gap is lower than the height of the inner edge, the air flow forms an upward backflow, and the blowing and preventing are completed.

[0068] Embodiment 3: The embodiment provides a different upper disc, which is different from embodiment 1, in the embodiment, the upper disc can be integrally formed when meeting the actual demand.

[0069] Embodiment 4: The embodiment provides a different closing structure, which is different from embodiment 1, in the embodiment, the closing part of the closing structure can be arranged at the middle position of the droplet channel when meeting the actual demand, or in other embodiments, the closing part of the closing structure can be arranged at the lower part of the droplet channel.

[0070] An embodiment of the gas backflow blowing and preventing clogging atomization and spraying disc of the application:

[0071] The gas backflushing anti-blocking atomizing spray disc structure provided by the embodiment is the same as the gas backflushing anti-blocking atomizing spray disc structure in any of the above atomizing pulverizing devices, and will not be described here again.

[0072] The above only provides preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gas backflushing anti-clogging atomizing spray disc, comprising a lower disc and an upper disc, a molten drop passage is arranged on the upper disc and penetrates vertically, a gas chamber and an annular gap are formed between the lower disc and the upper disc, the gas chamber is used for communicating with a gas source, and the annular gap is used for communicating the gas chamber with the molten drop passage, characterized in that, The elastic reset mechanism is arranged between the upper disc and the lower disc in sliding sealing fit, and one of the upper disc and the lower disc is a fixed part for being fixed to the frame, and the other is a sliding part, the upper disc and the lower disc keep relative position by the elastic reset mechanism during powder production, and the inner edge height of the lower end opening of the annular gap is not higher than the outer edge height, when the metal droplet is adhered to the droplet passage, the gas pressure in the gas chamber is increased, the sliding part overcomes the elastic force of the elastic reset part and slides away from the fixed part, so that the inner edge height of the lower end opening of the annular gap is higher than the outer edge height.

2. The gas backflush anti-clogging atomizing spray disc of claim 1, wherein, The elastic reset mechanism comprises a spring support arranged on the side of the sliding part away from the fixed part, and an elastic part arranged between the spring support and the sliding part, and the spring support is fixedly connected to the fixed part.

3. The gas backflush anti-clog atomizing spray disc of claim 2, wherein, The elastic part is arranged in a plurality of circumferential arrays.

4. The gas backflush anti-clogging atomizing spray disc of claim 2, wherein, The fixed part is the lower disc, and the sliding part is the upper disc.

5. The gas backflush anti-clog atomizing spray disc of claim 1, wherein, The droplet passage is a converging structure with gradually increasing inner diameter from the middle part to the upper and lower opening ends.

6. The gas backflush anti-clog atomizing spray disc of claim 5, wherein, The converging structure is smoothly transitioned at the converging part.

7. The gas backflush anti-clog atomizing spray disc of claim 6, wherein, The profile line of the longitudinal section of the converging structure is arc-shaped.

8. The gas backflush anti-clog atomizing spray disc of claim 7, wherein, The converging part of the converging structure is arranged close to the upper end opening of the droplet passage.

9. The gas backflushing anti-clogging atomizing spray disc according to any one of claims 1-8, characterized in that, The upper disc comprises an upper disc body and a feeding cylinder fixedly sleeved on the upper disc body, and the inner hole of the feeding cylinder constitutes the droplet passage.

10. An atomizing pulverizer comprising a frame on which an atomizing disk is mounted, and a gas source for supplying gas to the atomizing disk, characterized in that, The atomizing spray disc is the gas backflushing anti-blocking atomizing spray disc according to any one of the preceding claims 1-9.

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