Powder material suction device used for being matched with material storage barrel with upper opening

Abstract

A powder material suction device used for being matched with a material storage barrel with an upper opening comprises a material barrel supporting device, a suction pipe moving device and a suction pipe device. The material barrel supporting device comprises a base and a rotary platform movably installed at the upper end of the base. The straw moving device comprises a bearing frame, a second driving mechanism and a third driving mechanism; the supporting frame is fixedly mounted on the base; the second driving mechanism is provided with an action executing piece A which does horizontal linear movement; the third driving mechanism is provided with an action execution piece B which performs vertical lifting movement; the suction pipe device comprises a double-layer pipe and a material gathering plate; the double-layer pipe comprises an outer pipe and an inner pipe coaxially arranged in an inner hole of the outer pipe in a centered mode, and an annular column area is formed between the inner pipe and the outer pipe. The invention provides a powder material suction structure and a powder material suction method which are adaptive to an upper-opening storage barrel based on a technical route of conveying powder materials through a gas path, and the powder material suction structure and the powder material suction method are particularly suitable for efficient and residue-free transfer of UO2 powder in the nuclear fuel preparation process.

Description

Technical Field

[0001] The present invention relates to the technical field of uranium conversion related equipment, in particular to a powder material suction device adapted to an upper opening storage barrel. Background Art

[0002] The nuclear fuel production process involves two steps: uranium purification and uranium conversion. Purification involves converting uranium ore concentrate into refined UO2, while conversion involves converting refined UO2 into UF6. The UO2 powder produced in the purification step is stored in specialized tanks for future use. The conversion step involves transferring UO2 powder from multiple tanks into a transfer silo (referred to as the UO2 dosing operation).

[0003] Patent publication number CN116853823A discloses a "pneumatically conveyed radioactive powder feeding system" for the aforementioned UO2 feeding operation. The storage tank is removed from the first floor of the plant, and the UO2 powder is fed into a delivery pipeline. The negative pressure provided by a vacuum pump drives the UO2 powder through the pipeline, ultimately delivering it to a transfer tank on the third floor. Compared to transporting the powder along with the storage tank, this solution offers a simpler structure and streamlined process.

[0004] However, the storage tank in this solution has the problems of complex structure (embodied in that the lower end opening of the storage tank is a double-cover structure of an inner sealing cover + an outer protective cover, the inner sealing cover is opened or closed by an operating panel located at the upper end of the storage tank, and the outer protective cover is a complex mechanism assembled from multiple components), high manufacturing cost (embodied in the large number of components), difficulty in automated adaptation (embodied in that an automatic cover-opening mechanism for opening the inner sealing cover and an automatic cover-opening mechanism for opening the outer protective cover need to be designed separately, as well as a sealing docking mechanism for docking with the lower end opening of the storage tank, and multiple mechanisms need to coordinate with each other) and high probability of failure (embodied in that a screw-nut substructure is used between the inner sealing cover and the operating panel, and the powder inside the storage tank can easily enter the gap between the screw and the nut, making it difficult to twist the operating panel, and thus making it difficult to open or close the inner sealing cover).

[0005] Currently, due to the need for process improvement, relevant companies are preparing to phase out storage tanks with the above-mentioned structure and replace them with top-opening storage barrels (such as milk barrels) that are simple in structure, low in manufacturing cost, easy to automate, and stable and reliable. These top-opening storage barrels consist solely of a barrel body and a cover located at the upper end of the barrel body. Therefore, it is necessary to design a negative pressure suction structure and method for powder materials suitable for top-opening storage barrels based on the technical route of pneumatic conveying of powder materials. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a powder material suction device adapted for an upper opening storage barrel. It is based on the technical route of pneumatically conveying powder materials and provides a powder material suction structure and method adapted for an upper opening storage barrel.

[0007] The technical solution of the present invention is: a powder material suction device adapted for use with an upper-opening storage barrel, the target of which is the upper-opening storage barrel; the upper-opening storage barrel comprises a barrel body with an opening at the center of the upper end and an upper cover with a movable cover mounted on the opening; the powder material suction device adapted for use with the upper-opening storage barrel comprises a barrel support device, a suction pipe moving device, and a suction pipe device; The barrel support device includes a base and a rotating platform movably mounted on the upper end of the base, a barrel positioning area is provided on the upper end of the rotating platform, and a first driving mechanism for driving the rotating platform to move horizontally and linearly on the base is provided between the base and the rotating platform; The straw moving device includes a support frame, a second drive mechanism, and a third drive mechanism; the support frame is fixedly mounted on the base; the second drive mechanism is mounted on the upper end of the support frame and is provided with an actuator A for horizontal linear movement; the third drive mechanism is mounted on actuator A and is provided with an actuator B for vertical lifting movement; The straw device includes a double-layer tube and a material gathering plate; the double-layer tube includes an outer tube and an inner tube coaxially arranged in the inner hole of the outer tube, and a ring column area is formed between the inner tube and the outer tube. The inner tube and the outer tube are fixedly connected as a whole at the lower end face by a ring plate. The upper end of the inner tube extends from the upper end port of the outer tube and is directly or indirectly fixedly connected to the action actuator B. The upper end of the inner tube is provided with a plurality of connecting holes for connecting to the atmosphere, and the lower end of the inner tube is provided with a plurality of feed holes; multiple material gathering plates are evenly distributed in a ring shape and fixedly connected to the outer cylindrical surface of the lower end of the outer tube; a feed port is provided on the outer cylindrical surface of the lower end of the outer tube between any two adjacent material gathering plates; the straw device moves horizontally and linearly under the drive of the second driving mechanism, so that its vertical downward projection area faces or avoids the barrel positioning area of ​​the rotary platform, and the straw device moves vertically and downward under the drive of the third driving mechanism, so that it extends into the interior of the barrel body or exits the interior of the barrel body through the open opening at the upper end of the barrel body.

[0008] A further technical solution of the present invention is: one end of the gathering plate is connected to the outer circumferential surface of the lower end of the outer tube, and the other end extends radially outward of the outer tube; the gathering plate is arranged obliquely relative to the axis of the outer tube.

[0009] A further technical solution of the present invention is: the inner tube is provided with multiple groups of feed holes along the axial direction of the inner tube, each group includes multiple feed holes that surround the inner tube and are evenly distributed in a ring shape; the cross-sectional area of ​​a single feed hole is 5%-15% of the cross-sectional area of ​​a single feed port.

[0010] A further technical solution of the present invention is: the first driving mechanism is a mobile driving structure based on a screw-nut pair; it includes a slide rail, a slider, a screw, a nut and a motor X; the slide rail is fixedly mounted on the upper end of the base; the slider is fixedly mounted on the lower end of the rotary platform and slidingly cooperates with the slide rail; the screw is arranged parallel to the slide rail and rotatably mounted on the upper end of the base; the nut is threadedly cooperated with the screw and fixedly connected to the lower end of the rotary platform; the shaft of the motor X is connected to one end of the screw through a coupling, and the motor X drives the screw to rotate and thereby drives the nut and the rotary platform to move along the screw.

[0011] A further technical solution of the present invention is: a turntable for carrying an upper-opening storage barrel is provided at the upper end of the rotating platform, and a plurality of guide wheels for guiding the upper-opening storage barrel to be lowered and evenly distributed in a ring are provided at the edge of the turntable. The circular area formed by all the guide wheels on the upper surface of the turntable is the barrel positioning area.

[0012] A further technical solution of the present invention is: the second driving mechanism is a mobile driving structure based on a gear rack pair; it includes a motor mounting seat A, a motor A, a gear A and a rack A; the rack A is horizontally fixedly installed on the upper end of the support frame; the motor mounting seat A is slidably installed on the upper end of the support frame, and the sliding direction of the motor mounting seat A is parallel to the rack A; the motor A is fixedly installed on the motor mounting seat A, and the shaft of the motor A is connected to the gear A; the gear A is engaged with the rack A; the motor A drives the gear A to roll along the rack A, thereby driving the motor mounting seat A to slide; the action actuator A in the second driving mechanism is the motor mounting seat A.

[0013] A further technical solution of the present invention is: the third drive mechanism is a mobile drive structure based on a gear rack pair; it includes a motor mounting base B, a motor B, a gear B and a rack B; the motor mounting base B is fixedly installed on the motor mounting base A; the sliding frame and the motor mounting base B are in a vertical sliding fit; the rack B is vertically fixedly installed on the sliding frame; the motor B is fixedly installed on the motor mounting base B, and the shaft of the motor B is connected to the gear B; the gear B is engaged with the rack B; the motor B drives the gear B to roll along the rack B, thereby driving the sliding frame to slide; the action actuator B in the third drive mechanism is the sliding frame.

[0014] A further technical solution of the present invention is that: there are multiple sets of barrel support devices, all of which are arranged in a line in a straight line, and all of which share the same base.

[0015] Compared with the prior art, the present invention has the following advantages: 1. Based on the technical route of pneumatically conveying powder materials, it provides a powder material suction structure and method adapted to the upper opening storage barrel, which is particularly suitable for the efficient and residue-free transfer of UO2 powder in the nuclear fuel preparation process.

[0016] 2. The gathering plate optimizes powder guidance: The inclined gathering plate pushes the powder material near the barrel wall to flow toward the outer tube feed port during the rotation of the upper opening storage barrel, solving the problem of high residual rate at the barrel wall of traditional suction devices. It is especially suitable for the reduced diameter structure of the upper opening storage barrel.

[0017] 3. Depth adaptability of the double-tube structure: Multiple groups of axially distributed feed holes are set at the lower end of the inner tube, so that the suction device can capture powder nearby when sucking at different depths (the upper holes suck surface powder, and the lower holes suck bottom powder), reducing the distance the powder falls.

[0018] 4. Anti-interference performance of the dual-tube structure: During the deflection suction stage, the powder in the barrel is unevenly distributed. The interlayer between the ring and the column acts as a "temporary powder storage area" to smooth the fluctuating powder flow and avoid pulse breakdown (powder back-spray) caused by sudden changes in the airflow in the inner tube.

[0019] 5. Anti-clogging performance of the double-tube structure: 5.1 Compared with the single-tube structure where the feed port is easily buried by powder close to the barrel wall, the double-tube structure uses a ring-column interlayer to buffer, effectively avoiding powder blockage and maintaining continuous suction capacity; 5.2 The interlayer between the ring and column serves as a "temporary powder storage area" to temporarily store high-concentration powder flow, preventing high-concentration powder flow from directly entering the inner tube and causing instantaneous blockage; 5.3 Based on the characteristic that the cross-sectional area of ​​the feed port is greater than the cross-sectional area of ​​the feed hole (ratio of 5%-15%), a flow velocity gradient is formed from the annular column sandwich to the inner tube (the flow velocity at the feed hole suddenly increases), and the high-speed airflow is used to cut the powder agglomerate to prevent bridging; 5.4 A connecting hole is set at the upper end of the inner tube to directly connect to the atmosphere to balance the pressure difference between the inner tube and the annular column sandwich, so as to prevent the powder from being adsorbed on the inner wall of the sandwich due to negative pressure.

[0020] The present invention is further described below with reference to the figures and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the straw device in the first perspective; Figure 3 is a schematic structural diagram of the straw device under the second viewing angle; Figure 4 It is a structural diagram of the barrel support device; Figure 5 This is a schematic diagram of the "centering suction stage" during negative pressure suction operation; Figure 6 This is a schematic diagram of the "deflection suction stage" during negative pressure suction operation.

[0022] Legend: barrel body 11; base 21; rotating platform 22; barrel positioning area 221; guide wheel 222; slide rail 231; slider 232; lead screw 233; nut 234; motor X235; support frame 31; second drive mechanism 32; action actuator A321; third drive mechanism 33; action actuator B331; inner tube 41; connecting hole 411; feed hole 412; outer tube 42; feed port 421; annular plate 43; material gathering plate 44; ring column interlayer 45; reinforcement ring 46. DETAILED DESCRIPTION Example 1

[0023] like Figure 1-4 The figure shows a powder material suction device adapted for use with a top-opening storage barrel. The barrel comprises a barrel body 11 with an opening at the center of its upper end and a removable cover mounted on the opening. The lower section of barrel body 11 is a straight cylindrical section, while the upper section is a tapered section, making the opening smaller than the cross-sectional dimensions of the straight cylindrical section.

[0024] The utility model relates to a powder material suction device adapted for an upper opening material storage barrel, comprising a material barrel supporting device, a suction pipe moving device and a suction pipe device.

[0025] The barrel support device comprises a base 21 and a rotating platform 22 movably mounted on the upper end of the base 21. A barrel positioning area 221 is provided on the upper end of the rotating platform 22. A first drive mechanism is located between the base 21 and the rotating platform 22, driving the rotating platform 22 in horizontal linear motion on the base 21. This first drive mechanism is a motion-driven structure based on a lead screw and nut assembly. It comprises a slide rail 231, a slider 232, a lead screw 233, a nut 234, and a motor X 235. The slide rail is fixedly mounted on the upper end of the base. The slider is fixedly mounted on the lower end of the rotating platform and slidably engages with the slide rail. The lead screw is arranged parallel to the slide rail and rotatably mounted on the upper end of the base. The nut is threadedly engaged with the lead screw and fixedly connected to the lower end of the rotating platform. The shaft of the motor X is connected to one end of the lead screw via a coupling. The motor X drives the lead screw, which in turn drives the nut and the rotating platform 22 along the lead screw.

[0026] The straw moving device includes a support frame 31, a second drive mechanism 32, and a third drive mechanism 33. The support frame 31 is fixedly mounted on the base 21. The second drive mechanism 32 is mounted on the upper end of the support frame 31 and is equipped with an actuator A321 for horizontal linear movement. The third drive mechanism 33 is mounted on actuator A and is equipped with an actuator B331 for vertical lifting movement.

[0027] The second drive mechanism 32 is a mobile drive structure based on a rack and pinion pair. It includes a motor mount A, a motor A, a gear A, and a rack A. The rack A is horizontally fixedly mounted on the upper end of the support frame. The motor mount A is slidably mounted on the upper end of the support frame, and the sliding direction of the motor mount A is parallel to the rack A. The motor A is fixedly mounted on the motor mount A, and the shaft of the motor A is connected to the gear A. The gear A is meshed with the rack A. The motor A drives the gear A to roll along the rack A, thereby driving the motor mount A to slide. The action actuator A321 in the second drive mechanism is the motor mount A.

[0028] The third drive mechanism 33 is a mobile drive structure based on a rack and pinion pair. It includes a motor mount B, a motor B, a gear B, and a rack B. The motor mount B is fixedly mounted on the motor mount A. The sliding frame and the motor mount B are in vertical sliding cooperation. The rack B is vertically fixedly mounted on the sliding frame. The motor B is fixedly mounted on the motor mount B, and the shaft of the motor B is connected to the gear B. The gear B is meshed with the rack B. The motor B drives the gear B to roll along the rack B, thereby driving the sliding frame to slide. The action actuator B331 in the third drive mechanism is the sliding frame.

[0029] The straw device includes a double-layer tube and a material collecting plate 44. The double-layer tube includes an outer tube 42 and an inner tube 41 coaxially and centrally arranged in the inner hole of the outer tube 42. A ring column sandwich 45 is formed between the inner tube 41 and the outer tube 42. The inner tube 41 and the outer tube 42 are fixedly connected as a whole at the lower end surface by an annular plate 43. The upper end of the inner tube 41 extends from the upper end of the outer tube 42 and is directly or indirectly fixedly connected to the action actuator B. The upper end of the inner tube 41 is provided with a plurality of connecting holes 411 for connecting to the atmosphere, and the lower end of the inner tube 41 is provided with a plurality of feed holes 412. Three material collecting plates 44 are evenly distributed in an annular shape and fixedly connected to the outer circumferential surface of the lower end of the outer tube 42. A feed port 421 is provided on the outer circumferential surface of the lower end of the outer tube 42 between any two adjacent material collecting plates 44. Driven by the second drive mechanism, the straw device moves horizontally and linearly, so that its vertical downward projection area faces or avoids the barrel positioning area 221 of the rotary platform. The straw device is driven by the third driving mechanism to move vertically up and down, thereby extending into the interior of the barrel body 11 through the upper opening of the barrel body 11 or exiting the interior of the barrel body 11.

[0030] Preferably, there are multiple sets of barrel support devices, all of which are arranged in a line in a straight line, and all of which share the same base 21 .

[0031] Preferably, one end of the material gathering plate 44 is connected to the outer circumferential surface of the lower end of the outer tube 42, and the other end extends radially outward of the outer tube 42. The material gathering plate 44 is arranged obliquely relative to the axis of the outer tube 42.

[0032] Preferably, the inner tube 41 is provided with multiple groups of feed holes 412 along the axial direction of the inner tube 41, each group including multiple feed holes 412 uniformly distributed in an annular pattern around the inner tube 41. The cross-sectional area of ​​a single feed hole 412 is 5%-15% of the cross-sectional area of ​​a single feed port 421.

[0033] Preferably, a turntable for supporting an upper-opening storage barrel is provided at the upper end of the rotating platform 22, and a plurality of guide wheels 222 are provided at the edge of the turntable for guiding the upper-opening storage barrel to be lowered and are evenly distributed in a ring shape. The circular area formed by all the guide wheels 222 on the upper surface of the turntable is the barrel positioning area 221.

[0034] Preferably, the straw device also includes a reinforcement ring 46 connecting all the gathering plates 44. The reinforcement ring 46 is a rigid component. The reinforcement ring 46 is connected to the radial outer edges of all the gathering plates 44, thereby increasing the structural strength of the single-piece gathering plate 44 and reducing the probability of the gathering plate 44 breaking during the process of pushing the powder material.

[0035] Briefly describe the working principle of the present invention: The present invention is used to cooperate with a negative pressure system to suck powder materials in an upper-opening storage barrel, and is combined with an original "eccentric rotation" suction method to avoid powder material residue in the upper-opening storage barrel and improve suction efficiency.

[0036] The present invention is in an initial state before performing the suction operation. In the initial state: Ⅰ. Through the vertical lifting action of the third driving mechanism, the straw mechanism is moved to the highest position of its lifting stroke.

[0037] Ⅱ. The upper end of the inner tube is connected to an external negative pressure source.

[0038] The suction operation is as follows: S01, hoisting the upper opening storage barrel: A. Control the first drive mechanisms in all the barrel support devices simultaneously or in no particular order, so that all the rotary platforms move to the operating range of the staggered straw devices (i.e., the rotary platforms and the straw devices are not directly opposite each other up and down), thereby facilitating the subsequent lifting of the open storage barrels.

[0039] B. First open the upper cover of the upper-opening storage barrel, and then use a crane to lift the upper-opening storage barrel filled with powder material and place it in the barrel positioning area 221 of the rotary platform. During the lifting and placement process, the lower end outer wall of the upper-opening storage barrel rolls in contact with all the guide wheels 222, so that all the guide wheels 222 jointly correct the deviation and center the barrel, and then the upper-opening storage barrel finally falls at the center of the barrel positioning area 221.

[0040] In this step, step B is repeated to hoist and place an upper-opening material storage barrel in the barrel positioning area 221 of each set of barrel support devices.

[0041] S02, upper and lower alignment adjustment: A. The first driving mechanism in the target barrel support device is actuated to move the corresponding rotary platform together with the target upper-opening storage barrel carried thereon into the operating range of the straw device (i.e., the vertical downward projection area of ​​the path swept by the straw device along the horizontal straight line).

[0042] B. The second driving mechanism is activated to move the straw device to the position directly above the opening of the target upper-opening storage barrel (ie, the axis of the inner tube coincides with the center line of the opening of the upper-opening storage barrel).

[0043] S03, negative pressure suction operation: like Figure 5-6 As shown, the third driving mechanism is activated to lower the straw device. When the lower end of the straw device enters the opening of the target upper opening storage barrel, the powder material suction operation is started. The suction operation includes the "centering suction stage" and the "deflected suction stage" that follow one after another.

[0044] The "Centered Suction Phase" operates as follows: A. Perform the following two tasks simultaneously: ①. The external negative pressure source is activated, so that the powder material in the inner cavity of the upper opening storage barrel enters the annular column interlayer 45 through the feed port 421 of the outer tube 4 under the action of negative pressure, and then enters the inner hole of the inner tube 41 through the feed hole 412 of the inner tube 41, flows along the air flow in the inner hole of the inner tube 41 to the upper end of the inner tube 41, and is finally discharged from the upper end of the inner tube 41.

[0045] ②. The third drive mechanism is activated, causing the straw device to descend at a speed that matches the amount of powder material sucked away (i.e., as the powder material is continuously sucked away, the upper surface of the powder material in the reduced diameter section of the inner cavity of the upper opening storage barrel also continues to descend, and the descending speed of the straw device is consistent with the descending speed of the upper surface of the powder material).

[0046] B. When all the material gathering plates at the lower end of the suction pipe device enter the straight section from the reduced diameter section of the upper opening storage barrel, the "center suction stage" ends.

[0047] The "deflection suction phase" operates as follows: A. The second driving mechanism is activated to move the straw device radially outward from the inner cavity of the target upper-opening storage barrel until the minimum cylinder that can accommodate all the gathering plates is less than 10 mm from the inner wall of the straight section of the upper-opening storage barrel and stops moving. At this time, the straw device is arranged eccentrically.

[0048] B. Perform the following three tasks simultaneously: ①. The rotary platform starts, driving the target upper opening storage barrel placed on it to rotate.

[0049] ②. The third drive mechanism is activated, causing the straw device to descend at a speed that matches the amount of powder material sucked away (i.e., as the powder material is continuously sucked away, the upper surface of the powder material in the reduced diameter section of the inner cavity of the upper opening storage barrel also continues to descend, and the descending speed of the straw device is consistent with the descending speed of the upper surface of the powder material).

[0050] ③. The external negative pressure source is activated, so that the powder material in the inner cavity of the upper opening storage barrel enters the annular column interlayer 45 through the feed port 421 of the outer tube 4 under the action of negative pressure, and then enters the inner hole of the inner tube 41 through the feed hole 412 of the inner tube 41, flows along the air flow in the inner hole of the inner tube 41 to the upper end of the inner tube 41, and is finally discharged from the upper end of the inner tube 41.

[0051] The three steps in this step are performed simultaneously, causing the powder material on the inner wall of the upper-opening storage barrel to be pushed by the gathering plate and moved toward the outer tube feed port, thereby improving the suction effect of the powder material on the inner wall of the upper-opening storage barrel. Furthermore, the suction device forms a spiral downward motion trajectory in the narrowing section of the upper-opening storage barrel, thereby achieving uniform and residue-free suction of the powder material.

Claims

1. A powder material suction device adapted for use with a top-opening storage barrel, the target of which is a top-opening storage barrel; the top-opening storage barrel comprises a barrel body with an opening at the center of the upper end and an upper cover with a movable cover mounted on the opening; the characteristics of the device are: It includes a barrel supporting device, a straw moving device and a straw device; The barrel support device includes a base and a rotating platform movably mounted on the upper end of the base, a barrel positioning area is provided on the upper end of the rotating platform, and a first driving mechanism for driving the rotating platform to move horizontally and linearly on the base is provided between the base and the rotating platform; The straw moving device includes a support frame, a second drive mechanism, and a third drive mechanism; the support frame is fixedly mounted on the base; the second drive mechanism is mounted on the upper end of the support frame and is provided with an actuator A for horizontal linear movement; the third drive mechanism is mounted on actuator A and is provided with an actuator B for vertical lifting movement; The straw device includes a double-layer tube and a material gathering plate; the double-layer tube includes an outer tube and an inner tube coaxially arranged in the inner hole of the outer tube, and a ring column area is formed between the inner tube and the outer tube. The inner tube and the outer tube are fixedly connected as a whole at the lower end face by a ring plate. The upper end of the inner tube extends from the upper end port of the outer tube and is directly or indirectly fixedly connected to the action actuator B. The upper end of the inner tube is provided with a plurality of connecting holes for connecting to the atmosphere, and the lower end of the inner tube is provided with a plurality of feed holes; multiple material gathering plates are evenly distributed in a ring shape and fixedly connected to the outer cylindrical surface of the lower end of the outer tube; a feed port is provided on the outer cylindrical surface of the lower end of the outer tube between any two adjacent material gathering plates; the straw device moves horizontally and linearly under the drive of the second driving mechanism, so that its vertical downward projection area faces or avoids the barrel positioning area of ​​the rotary platform, and the straw device moves vertically and downward under the drive of the third driving mechanism, so that it extends into the interior of the barrel body or exits the interior of the barrel body through the open opening at the upper end of the barrel body.

2. The powder material suction device for adapting to the upper opening storage barrel according to claim 1, characterized in that: One end of the material gathering plate is connected to the outer circumferential surface of the lower end of the outer tube, and the other end extends radially outward of the outer tube; the material gathering plate is arranged obliquely relative to the axis of the outer tube.

3. The powder material suction device for adapting to the upper opening storage barrel according to claim 2, characterized in that: The inner tube is provided with multiple groups of feed holes along the axial direction of the inner tube, and each group includes multiple feed holes that surround the inner tube and are evenly distributed in a ring shape; the cross-sectional area of ​​a single feed hole is 5%-15% of the cross-sectional area of ​​a single feed port.

4. The powder material suction device for adapting to the upper opening storage barrel according to claim 3, characterized in that: The first driving mechanism is a mobile driving structure based on a screw-nut pair; it includes a slide rail, a slider, a screw, a nut and a motor X; the slide rail is fixedly mounted on the upper end of the base; the slider is fixedly mounted on the lower end of the rotary platform and slidingly cooperates with the slide rail; the screw is arranged parallel to the slide rail and rotatably mounted on the upper end of the base; the nut is threadedly engaged with the screw and fixedly connected to the lower end of the rotary platform; the shaft of the motor X is connected to one end of the screw through a coupling, and the motor X drives the screw to rotate and thereby drives the nut and the rotary platform to move along the screw.

5. The powder material suction device for adapting to the upper opening storage barrel according to claim 4, characterized in that: A turntable for carrying an upper-opening storage barrel is provided at the upper end of the rotating platform. A plurality of guide wheels evenly distributed in a ring shape are provided at the edge of the turntable for guiding the upper-opening storage barrel to be lowered. The circular area formed by all the guide wheels on the upper surface of the turntable is the barrel positioning area.

6. The powder material suction device for adapting to the upper opening storage barrel according to claim 5, characterized in that: The second driving mechanism is a mobile driving structure based on a gear rack pair; it includes a motor mounting base A, a motor A, a gear A and a rack A; the rack A is horizontally fixedly installed on the upper end of the support frame; the motor mounting base A is slidably installed on the upper end of the support frame, and the sliding direction of the motor mounting base A is parallel to the rack A; the motor A is fixedly installed on the motor mounting base A, and the shaft of the motor A is connected to the gear A; the gear A is engaged with the rack A; the motor A drives the gear A to roll along the rack A, thereby driving the motor mounting base A to slide; the action actuator A in the second driving mechanism is the motor mounting base A.

7. The powder material suction device for adapting to the upper opening storage barrel according to claim 6, characterized in that: The third drive mechanism is a mobile drive structure based on a gear rack pair; it includes a motor mount B, a motor B, a gear B, and a rack B; the motor mount B is fixedly mounted on the motor mount A; the sliding frame and the motor mount B are in vertical sliding engagement; the rack B is vertically fixedly mounted on the sliding frame; the motor B is fixedly mounted on the motor mount B, the shaft of the motor B is connected to the gear B; the gear B meshes with the rack B; the motor B drives the gear B to roll along the rack B, thereby driving the sliding frame to slide; The action executing member B in the third driving mechanism is a sliding frame.

8. The powder material suction device for adapting to the upper opening storage barrel according to claim 7, characterized in that: There are multiple sets of barrel support devices, all of which are arranged in a line in a straight line and share a common base.

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