Powder feeding device for liquid preparation system

Abstract

The utility model relates to the technical field of chemical production equipment, in particular to a powder feeding device for a liquid preparation system, and aims to solve the problems that manual liquid preparation is high in operation difficulty and low in production efficiency. The automatic feeding device comprises a feeding assembly and a discharging assembly. The feeding assembly comprises a grabbing unit and a lifting unit, the grabbing unit is used for grabbing bagged materials, and the lifting unit is used for driving the grabbing unit to ascend and descend; the unloading assembly is arranged above the container tank and comprises a blade, and the blade is used for cutting the packaging bag; the grabbing unit is rotationally installed on the lifting unit and is configured to rotate around the axis of the grabbing unit so that the blade can cut the packaging bag. The lifting unit drives the grabbing unit to ascend and descend, the grabbing unit rotates to grab bagged materials to the position above a container tank, packaging bags of the bagged materials are cut by the blade through rotation of the grabbing unit, and then the materials fall into the container tank. And the conditions of low efficiency and high labor intensity caused by manual material carrying and dumping are avoided.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, and in particular to a powder feeding device for a liquid preparation system. Background Technology

[0002] The chemical industry requires the preparation of various cleaning solutions to clean radioactive containers, including sodium carbonate, sodium nitrate, sodium hydroxide, and oxalic acid solutions. The solution preparation process involves lifting these materials to the container inlet, unpacking them, and transferring the powdered materials into the corresponding material containers for preparation. This process is cumbersome due to the large size of the containers, the difficulty of manual operation, and low production efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a powder feeding device for a liquid preparation system to solve the problems of high difficulty and low production efficiency in manual liquid preparation.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0005] A powder feeding device for a liquid preparation system includes a feeding assembly and a discharging assembly;

[0006] The feeding assembly includes a gripping unit and a lifting unit. The gripping unit is used to grip bagged materials, and the lifting unit is used to drive the gripping unit to move up and down.

[0007] The unloading assembly is positioned above the container and includes blades for cutting open packaging bags;

[0008] The gripping unit is rotatably mounted on the lifting unit and configured to rotate about its own axis to allow the blade to cut through the packaging bag.

[0009] In some alternative embodiments, the gripping unit includes two grippers that open and close to grip bagged material.

[0010] In some optional embodiments, the gripping unit further includes a gripping seat, a gripping link, and a first telescopic rod, with the two grippers respectively hinged to the gripping seat;

[0011] One end of each of the two gripping links is hinged to the extended end of the first telescopic rod, and the other end is respectively hinged to the two grippers;

[0012] The first telescopic rod extends and retracts to drive the gripper to open and close.

[0013] In some optional embodiments, the feeding assembly further includes a rotary unit, which includes gears and racks;

[0014] The gear is connected to the gripping unit, and the rack meshes with the gear;

[0015] The rack moves along its own length to drive the gear to rotate, which in turn drives the gripping unit to rotate.

[0016] In some alternative embodiments, the lifting unit includes a lifting platform and a lifting frame;

[0017] The gripping unit is rotatably mounted on the lifting platform, and the lifting platform is slidably mounted on the lifting frame and configured to move in the vertical direction.

[0018] In some optional embodiments, the lifting platform includes a main body, a rotating shaft, a connecting plate, a limiting gear, and a limiting plate;

[0019] The rotary shaft is rotatably mounted on the main body, the limiting gear is sleeved on the rotary shaft, the connecting plate and the limiting plate are both connected to the rotary shaft, and the gripping unit is rotatably mounted on the connecting plate;

[0020] The lifting frame is provided with a limiting rack and a limiting groove located below the limiting rack;

[0021] The limiting plate engages with the limiting groove and slides along the limiting groove to prevent the rotary shaft from rotating; after the limiting plate slides out of the limiting groove, the limiting rack meshes with the limiting gear to make the rotary shaft rotate.

[0022] In some optional embodiments, the lifting unit further includes a drive sprocket, a driven sprocket, a transmission chain, and a drive motor;

[0023] The driving sprocket, the driven sprocket, and the transmission chain constitute a chain drive structure, and the drive motor is used to drive the driving sprocket to rotate.

[0024] The lifting platform is mounted on the transmission chain.

[0025] In some optional embodiments, the unloading assembly further includes a tapping unit, which includes a first tapping frame, a second tapping frame, and a tapping link for tapping the packaging bag;

[0026] The two ends of the striking link are respectively hinged to the first striking frame and the second striking frame;

[0027] The first striking frame rotates around its own axis to drive the second striking frame to rotate, and the first striking frame and the second striking frame rotate in opposite directions.

[0028] In some alternative embodiments, the unloading assembly further includes a funnel, a gate valve, and a second telescopic rod;

[0029] The blade is mounted on the funnel, and the second telescopic rod is rotatably mounted on the funnel;

[0030] The extended end of the second telescopic rod is hinged to the first striking frame, and is used to drive the first striking frame to rotate around its own axis;

[0031] The gate valve is installed at the inlet of the container tank and is used to control the opening and closing of the inlet of the container tank.

[0032] In some alternative embodiments, the powder feeding device for the liquid preparation system further includes a transfer component and at least one conveying component;

[0033] The conveying assembly is used to convey bagged materials to the gripping station; the transfer assembly is used to move the feeding assembly along a first direction so that the feeding assembly moves to the gripping station.

[0034] Based on the above technical solutions, the technical effects achieved by this utility model are as follows:

[0035] The powder feeding device for a liquid preparation system provided by this utility model includes a feeding assembly and a discharging assembly; the feeding assembly includes a gripping unit and a lifting unit, the gripping unit is used to grip bagged materials, and the lifting unit is used to drive the gripping unit to lift and lower; the discharging assembly is set above the container tank and includes a blade, the blade is used to cut the packaging bag; the gripping unit is rotatably mounted on the lifting unit and configured to rotate around its own axis so that the blade cuts the packaging bag.

[0036] The powder feeding device for a liquid preparation system provided by this utility model uses a lifting unit to drive a gripping unit to lift and rotate, thereby gripping bagged materials above a container. The rotation of the gripping unit cuts the packaging bag of the material with a blade, allowing the material to fall into the container, completing the automatic material conveying process. This avoids the inefficiency and high labor intensity caused by manual handling and dumping. Simultaneously, the gripping unit's rotation around its own axis avoids interference with the container during the lifting and lowering process. Attached Figure Description

[0037] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of a powder feeding device for a liquid preparation system provided in an embodiment of the present invention;

[0039] Figure 2 This is a structural diagram of the grasping unit;

[0040] Figure 3 This is a structural schematic diagram of the lifting unit;

[0041] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0042] Figure 5 This is another structural diagram of the lifting order;

[0043] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0044] Figure 7 This is a structural diagram of the lifting platform;

[0045] Figure 8 This is a schematic diagram of the unloading assembly.

[0046] Figure 9 This is a schematic diagram of the tapping unit.

[0047] Icons: 100, Feeding assembly; 110, Gripping unit; 120, Lifting unit; 130, Rotating unit; 111, Gripper; 112, Gripping seat; 113, Gripping linkage; 114, First telescopic rod; 121, Lifting platform; 122, Lifting frame; 123, Drive sprocket; 124, Driven sprocket; 125, Transmission chain; 126, Drive motor; 101, Main body; 102, Rotary shaft; 103, Connecting plate; 104, Limit gear; 105, Limit plate; 106, Track wheel; 201, Limit rack; 202, Limit groove;

[0048] 210. Blade; 220. Beating unit; 230. Funnel; 240. Gate valve; 250. Second telescopic rod; 221. First beating frame; 222. Second beating frame; 223. Beating connecting rod;

[0049] 300. Transfer assembly; 400. Conveying assembly; 10. Container tank. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0052] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0053] The chemical industry requires the preparation of various cleaning solutions to clean radioactive containers, including sodium carbonate, sodium nitrate, sodium hydroxide, and oxalic acid solutions. The solution preparation process involves lifting these materials to the container inlet, unpacking them, and transferring the powdered materials into the corresponding material containers for preparation. This process is cumbersome due to the large size of the containers, the difficulty of manual operation, and low production efficiency.

[0054] In view of this, the present invention provides a powder feeding device for a liquid preparation system, including a feeding assembly 100 and a discharging assembly; the feeding assembly 100 includes a gripping unit 110 and a lifting unit 120, the gripping unit 110 is used to grip bagged materials, and the lifting unit 120 is used to drive the gripping unit 110 to lift; the discharging assembly is disposed above the container 10 and includes a blade 210, the blade 210 is used to cut the packaging bag; the gripping unit 110 is rotatably mounted on the lifting unit 120 and configured to rotate around its own axis so that the blade 210 cuts the packaging bag.

[0055] The powder feeding device for a liquid preparation system provided by this utility model uses a lifting unit 120 to drive the gripping unit 110 to lift and rotate, thereby gripping bagged materials above the container tank 10. The rotation of the gripping unit 110 causes the packaging bag of the bagged material to be cut by the blade 210, allowing the material to fall into the container tank 10, completing the automatic material conveying and avoiding the inefficiency and high labor intensity caused by manual handling and dumping. Simultaneously, the rotation of the gripping unit 110 around its own axis allows it to avoid interference with the container tank 10 during the lifting and lowering process driven by the lifting unit 120.

[0056] The following combination Figures 1-9 The structure and shape of the powder feeding device for the liquid preparation system provided in this embodiment will be described in detail:

[0057] In some alternative embodiments, the gripping unit 110 includes two grippers 111 that open and close to grip bagged materials. Specifically, as shown... Figure 2As shown, the gripper 111 is equipped with multiple arc-shaped round steel bars, the ends of which are tapered and used to pierce into the packaging bag to complete the gripping.

[0058] Furthermore, the gripping unit 110 also includes a gripping seat 112, gripping links 113, and a first telescopic rod 114. Two grippers 111 are respectively hinged to the gripping seat 112; one end of each of the two gripping links 113 is hinged to the extended end of the first telescopic rod 114, and the other end is respectively hinged to the two grippers 111; the first telescopic rod 114 extends and retracts to drive the grippers 111 to open and close.

[0059] Specifically, the extended end of the first telescopic rod 114 is hinged at a point to the two gripping links 113. The hinge point between the gripping links 113 and the grippers 111 does not coincide with the hinge point between the grippers 111 and the gripping seat 112. The first telescopic rod 114 extends and retracts vertically, thereby forming a crank-slider mechanism. The extension and retraction of the first telescopic rod 114 drives the opening and closing of the two grippers 111. In this embodiment, the first telescopic rod 114 can be a cylinder, an electric telescopic rod, etc.

[0060] In addition, the opening and closing action can be completed by driving the two grippers 111 to rotate using two motors respectively.

[0061] In some optional embodiments, the feeding assembly 100 further includes a rotary unit 130, which includes a gear, a rack, and a linear drive. The gear is connected to the gripping unit 110, and the rack meshes with the gear. The linear drive is connected to the rack and is used to drive the rack to move along its own length to drive the gear to rotate, thereby driving the gripping unit 110 to rotate. The linear drive can be a cylinder, an electric telescopic rod, etc.

[0062] In some alternative embodiments, the rotary unit 130 may be configured as a motor connected to the rotary shaft 102 on the gripper seat 112, thereby driving the gripper seat 112 to rotate about its own axis.

[0063] In some alternative embodiments, the lifting unit 120 includes a lifting platform 121 and a lifting frame 122; the gripping unit 110 is rotatably mounted on the lifting platform 121, and the lifting platform 121 is slidably mounted on the lifting frame 122 and configured to move in the vertical direction.

[0064] In some optional embodiments, the lifting platform 121 includes a main body 101, a rotating shaft 102, a connecting plate 103, a limiting gear 104, and a limiting plate 105, such as... Figure 7 As shown. The rotary shaft 102 is rotatably mounted on the main body 101, the limiting gear 104 is sleeved on the rotary shaft 102, the connecting plate 103 and the limiting plate 105 are both connected to the rotary shaft 102 and located at both ends of the rotary shaft 102, and the gripping unit 110 is rotatably mounted on the connecting plate 103.

[0065] The lifting frame 122 is provided with a limiting rack 201 and a limiting groove 202 located below the limiting rack 201, such as Figure 4 , Figure 6 As shown; the limiting plate 105 is engaged with the limiting groove 202 and slides along the limiting groove 202 to prevent the rotating shaft 102 from rotating; after the limiting plate 105 slides out of the limiting groove 202, the limiting rack 201 meshes with the limiting gear 104 to make the rotating shaft 102 rotate.

[0066] Specifically, the limiting gear 104 is a sector gear, and the limiting groove 202 is composed of two vertical square tubes on the lifting frame 122 with a flared opening at the upper end to allow the limiting plate 105 to re-engage in the limiting groove 202 when the lifting platform 121 descends. The limiting plate 105 includes a plate body and a limiting post, with the limiting post installed on the plate body and used to cooperate with the limiting groove 202; for example... Figure 6 As shown, two limiting posts are provided on the plate.

[0067] In this embodiment, the lifting platform 121 further includes track wheels 106, and the lifting frame 122 further includes four vertically arranged columns, with adjacent columns connected by horizontally arranged connecting pipes. The track wheels 106 are of an I-beam structure and roll along the columns, thereby achieving limiting through the cooperation between the track wheels 106 and the columns.

[0068] In some optional embodiments, the lifting unit 120 further includes a drive sprocket 123, a driven sprocket 124, a transmission chain 125, and a drive motor 126, such as Figure 3 As shown, the drive sprocket 123, driven sprocket 124, and transmission chain 125 form a chain drive structure. The drive motor 126 drives the drive sprocket 123 to rotate. The lifting platform 121 is mounted on the transmission chain 125. The drive motor 126 rotates in both directions to drive the chain drive structure, thereby driving the lifting platform 121 to move up and down.

[0069] In some optional embodiments, the unloading assembly further includes a tapping unit 220, which includes a first tapping frame 221, a second tapping frame 222, and a tapping link 223, for tapping the packaging bag, such as... Figure 8 , Figure 9 As shown. The two ends of the striking link 223 are hinged to the first striking frame 221 and the second striking frame 222 respectively; the first striking frame 221 rotates around its own axis to drive the second striking frame 222 to rotate. The first striking frame 221 and the second striking frame 222 rotate in opposite directions so that the opening and closing action of the two can strike the packaging bag, thereby causing the residual material to detach from the packaging bag and fall into the container 10.

[0070] Specifically, the first striking frame 221 and the second striking frame 222 can be configured as rectangular, circular, triangular, or other structures. The hinge point between the striking link 223 and the first striking frame 221 is located above the rotation axis of the first striking frame 221, and the hinge point between the striking link 223 and the second striking frame 222 is located below the rotation axis of the second striking frame 222, thereby ensuring that the first striking frame 221 and the second striking frame 222 rotate in opposite directions.

[0071] In some optional embodiments, the unloading assembly further includes a funnel 230, a gate valve 240, and a second telescopic rod 250; a blade 210 is mounted on the funnel 230, and the second telescopic rod 250 is rotatably mounted on the funnel 230; a first striking frame 221 and a second striking frame 222 are rotatably mounted on the funnel 230; the extended end of the second telescopic rod 250 is hinged to the first striking frame 221, for driving the first striking frame 221 to rotate around its own axis and driving the second striking frame 222 to rotate via the striking connecting rod 223. Specifically, the second telescopic rod 250 may be a cylinder for rapid striking.

[0072] A gate valve 240 is installed at the inlet of container tank 10 to control the opening and closing of the inlet. The gate valve 240 is electrically driven to facilitate automatic feeding and controls the speed at which material falls into container tank 10, preventing uneven mixing due to excessive material entering the container tank. During use, the gate valve 240 is periodically opened and closed to break up crystals formed at the valve, preventing pipe blockage. After material is poured into container tank 10, the gate valve 240 is closed to prevent dust from escaping.

[0073] In this embodiment, the funnel 230 is provided with multiple blades 210 for opening the packaging bag, thereby allowing the material to fall smoothly into the container 10 and preventing the packaging bag from forming fragments that fall into the container 10. The blades 210 are arranged along the running direction of the bagged material to facilitate cutting the packaging bag, and the structure of the blades 210 can be set as triangular, rhomboid, arc-shaped, etc.

[0074] In some optional embodiments, the powder feeding device for the liquid preparation system further includes a transfer assembly 300 and at least one conveying assembly 400, such as... Figure 1 As shown.

[0075] The conveying assembly 400 is used to convey bagged materials to the gripping station. Multiple conveying assemblies 400 can convey different materials respectively. The transfer assembly 300 is used to drive the feeding assembly 100 to move along the first direction so that the feeding assembly 100 moves to the gripping station, thereby facilitating the feeding assembly 100 to grip the bagged materials.

[0076] Specifically, the conveying component 400 can be configured as a conveyor belt structure to continuously transport bagged materials to the gripping station. The transfer component 300 can use a linear guide rail and synchronous belt drive to move the feeding component 100 along a first direction, which is horizontal. The feeding component 100 is mounted on a slider of the linear guide rail, and one side of the synchronous belt is connected to the feeding component 100 or the slider, thereby achieving the displacement of the feeding component 100 through motor drive. To avoid dust pollution, a bellows cover is provided on the transfer component 300.

[0077] The working process of the powder feeding device for the liquid preparation system provided in this embodiment is as follows:

[0078] The transfer assembly 300 moves the feeding assembly 100 to the gripping station. The lifting unit 120 lowers the gripping unit 110, and the grippers 111 on the gripping unit 110 close to insert the bagged material and complete the gripping. Subsequently, the lifting unit 120 raises the gripping unit 110, and the transfer assembly 300 moves the feeding assembly 100 towards the container 10.

[0079] As the lifting platform 121 drives the gripping unit 110 to rise, when the limiting gear 104 meshes with the limiting rack 201, the rotary shaft 102 rotates to drive the gripping unit 110 to swing upward, thereby raising the highest position of the bagged material and preventing the lifting frame 122 from being too high. When the bagged material reaches the set height, the rotary unit 130 drives the gripping unit 110 to rotate, thereby causing the blade 210 to cut the packaging tape, and the material falls into the container tank 10 through the funnel 230.

[0080] Then the tapping unit 220 operates, and the remaining material falls into the container tank 10. The gate valve 240 is then closed to prevent dust from flying.

[0081] Repeat the above process to pour the material from bag to bag into container 10.

[0082] It should be noted that when the gripping unit 110 descends, it needs to avoid the container tank 10. This avoidance action can be accomplished by the transfer component 300 driving the feeding component 100 to move as a whole, or by the rotation unit 130 driving the gripping unit 110 to swing.

[0083] The powder feeding device for the liquid preparation system provided in this embodiment is suitable for liquid preparation systems that prepare solutions of sodium carbonate, sodium nitrate, sodium hydroxide, oxalic acid, etc. It has strong versatility, is resistant to acid and alkali corrosion, has controllable feeding speed, high efficiency, and high feeding accuracy, thereby improving system safety and reducing production labor costs.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A powder feeding device for a liquid preparation system, characterized in that, Includes a loading assembly (100) and a unloading assembly; The feeding assembly (100) includes a gripping unit (110) and a lifting unit (120). The gripping unit (110) is used to grip bagged materials, and the lifting unit (120) is used to drive the gripping unit (110) to lift. The unloading assembly is disposed above the container (10) and includes a blade (210) for cutting the packaging bag; The gripping unit (110) is rotatably mounted on the lifting unit (120) and configured to rotate about its own axis so that the blade (210) cuts through the packaging bag.

2. The powder feeding device for a liquid preparation system according to claim 1, characterized in that, The gripping unit (110) includes two grippers (111) that open and close to grip bagged materials.

3. The powder feeding device for a liquid preparation system according to claim 2, characterized in that, The gripping unit (110) further includes a gripping seat (112), a gripping link (113) and a first telescopic rod (114), and the two grippers (111) are respectively hinged to the gripping seat (112); One end of each of the two gripping links (113) is hinged to the extended end of the first telescopic rod (114), and the other end is respectively hinged to the two grippers (111); The first telescopic rod (114) extends and retracts to drive the gripper (111) to open and close.

4. The powder feeding device for a liquid preparation system according to claim 1, characterized in that, The feeding assembly (100) further includes a rotary unit (130), which includes gears and racks; The gear is connected to the gripping unit (110), and the rack meshes with the gear; The rack moves along its own length to drive the gear to rotate, which in turn drives the gripping unit (110) to rotate.

5. The powder feeding device for a liquid preparation system according to claim 1, characterized in that, The lifting unit (120) includes a lifting platform (121) and a lifting frame (122); The gripping unit (110) is rotatably mounted on the lifting platform (121), and the lifting platform (121) is slidably mounted on the lifting frame (122) and configured to move in the vertical direction.

6. The powder feeding device for a liquid preparation system according to claim 5, characterized in that, The lifting platform (121) includes a main body (101), a rotating shaft (102), a connecting plate (103), a limiting gear (104), and a limiting plate (105); The rotary shaft (102) is rotatably mounted on the main body (101), the limiting gear (104) is sleeved on the rotary shaft (102), the connecting plate (103) and the limiting plate (105) are both connected to the rotary shaft (102), and the gripping unit (110) is rotatably mounted on the connecting plate (103). The lifting frame (122) is provided with a limiting rack (201) and a limiting groove (202) provided below the limiting rack (201); The limiting plate (105) is engaged with the limiting groove (202) and slides along the limiting groove (202) to prevent the rotary shaft (102) from rotating; after the limiting plate (105) slides out of the limiting groove (202), the limiting rack (201) meshes with the limiting gear (104) to make the rotary shaft (102) rotate.

7. The powder feeding device for a liquid preparation system according to claim 5, characterized in that, The lifting unit (120) also includes a drive sprocket (123), a driven sprocket (124), a transmission chain (125), and a drive motor (126); The driving sprocket (123), the driven sprocket (124), and the transmission chain (125) form a chain drive structure, and the drive motor (126) is used to drive the driving sprocket (123) to rotate; The lifting platform (121) is mounted on the transmission chain (125).

8. The powder feeding device for a liquid preparation system according to claim 1, characterized in that, The unloading assembly also includes a tapping unit (220), which includes a first tapping frame (221), a second tapping frame (222), and a tapping connecting rod (223) for tapping the packaging bag; The two ends of the striking link (223) are respectively hinged to the first striking frame (221) and the second striking frame (222); The first striking frame (221) rotates around its own axis to drive the second striking frame (222) to rotate. The first striking frame (221) and the second striking frame (222) rotate in opposite directions.

9. The powder feeding device for a liquid preparation system according to claim 8, characterized in that, The unloading assembly also includes a funnel (230), a gate valve (240), and a second telescopic rod (250); The blade (210) is mounted on the funnel (230), and the second telescopic rod (250) is rotatably mounted on the funnel (230); The extended end of the second telescopic rod (250) is hinged to the first beater (221) to drive the first beater (221) to rotate around its own axis; The gate valve (240) is installed at the inlet of the container (10) and is used to control the opening and closing of the inlet of the container (10).

10. The powder feeding device for a liquid preparation system according to claim 9, characterized in that, It also includes a transfer component (300) and at least one conveying component (400); The conveying assembly (400) is used to convey bagged materials to the gripping station; the transfer assembly (300) is used to drive the feeding assembly (100) to move along the first direction so that the feeding assembly (100) moves to the gripping station.

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