Powder supply center

Abstract

The utility model discloses a powder supply center which comprises a powder box, a powder pump assembly and a cleaning gas input assembly. The powder box is provided with a powder cavity, and a powder outlet hole communicated with the powder cavity is formed in the powder box. The powder pump assembly comprises an assembly base and a powder pump, the assembly base is provided with a powder outlet channel and a cleaning air channel, the powder inlet end of the powder outlet channel is communicated with the powder outlet hole, the powder outlet end of the powder outlet channel is communicated with the powder pumping end of the powder pump, and the air outlet end of the cleaning air channel penetrates through the channel wall of the powder outlet channel and is communicated with the powder outlet channel. An acute included angle is formed between the axis of the cleaning air channel and the axis of the powder outlet channel, so that airflow entering from the cleaning air channel flows towards one side of the powder outlet end of the powder outlet channel. The cleaning gas input assembly is connected with the assembly base and used for inputting compressed gas into the cleaning gas channel, the cleaning gas input assembly comprises an on-off control valve, and the on-off control valve is used for controlling connection and disconnection between the input gas and the cleaning gas channel. According to the powder supply center, the gas circuit structure is simple, and manufacturing and implementation are easy.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying, in particular to a powder supply center. Background Art

[0002] The existing powder supply center is equipped with a powder box and a powder pump assembly. The spray powder is stored in the powder box, and the powder pump assembly is used to extract the spray powder in the powder box and transport it to the spray gun. When the powder supply center changes color, it is necessary to clean the powder box and the powder path. In the existing technology, in order to facilitate the cleaning of the toner, refer to Figure 1 The powder pump assembly is provided with a front powder outlet channel 1, a rear powder outlet channel 2, a first purge air input channel 3, and a second purge air input channel 4. The front powder outlet channel 1 and the rear powder outlet channel 2 are connected or disconnected by a valve 5. The front powder outlet channel 1 is connected to the powder box, and the rear powder outlet channel 2 is connected to the powder extraction end of the powder pump 6. The first purge air input channel 3 is connected to the front powder outlet channel 1, and the second purge air input channel 4 is connected to the rear powder outlet channel 2. During normal operation, the valve 5 is opened, and the powder pump 6 extracts spray powder from the powder box through the rear powder outlet channel 2 and the front powder outlet channel 1, and delivers it to the spray gun through the external powder delivery pipe. When cleaning is required, the valve 5 is used to disconnect the connection between the front powder outlet channel 1 and the rear powder outlet channel 2, and compressed air is respectively input into the first purge air input channel 3 and the second purge air input channel 4, thereby cleaning the powder path from the rear powder outlet channel 2 to the external powder delivery pipe and the powder path from the front powder outlet channel 1 to the powder box. However, the above structure has many channels, a complex gas path structure, and is difficult to manufacture. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a powder supply center with a relatively simple gas path structure and is easy to manufacture and implement.

[0004] According to the powder supply center of the embodiment of the present invention, it includes: a powder box, which is provided with a powder cavity, and the powder box is provided with a powder outlet hole connected to the powder cavity; a powder pump assembly, including an assembly seat and a powder pump, the assembly seat is arranged on the powder box, the powder pump is arranged on the assembly seat, the assembly seat is provided with a powder outlet channel and a cleaning air channel, the powder outlet channel has a powder inlet end and a powder outlet end, the powder inlet end of the powder outlet channel is connected to the powder outlet hole, the powder outlet end of the powder outlet channel is connected to the powder extraction end of the powder pump, and the cleaning air channel has an air inlet end and an air outlet end The air outlet end of the cleaning air channel passes through the channel wall of the powder outlet channel and is connected to the powder outlet channel, and the axis of the cleaning air channel is set at an acute angle to the axis of the powder outlet channel so that the airflow entering from the cleaning air channel is biased to flow toward the powder outlet end of the powder outlet channel; a cleaning air input component is connected to the component seat and is used to input compressed gas to the cleaning air channel, and the cleaning air input component includes an on-off control valve, which is used to control the connection and disconnection between the input gas and the cleaning air channel.

[0005] The powder supply center according to the embodiment of the present invention has at least the following beneficial effects: in actual use scenarios, the length of the powder path from the powder pump of the powder supply center to the spray gun of the spray room is much longer than the length of the powder path from the powder pump to the powder box. The powder supply center provided by the embodiment of the present invention mainly cleans the section of the powder path from the powder pump to the external powder delivery pipe by compressed gas, and simultaneously completes the cleaning of the section of the powder path from the powder outlet channel to the powder box with the help of the effect of air pressure, thereby completing the powder spraying cleaning of the entire powder path. Since there are few air paths for inputting compressed gas, the overall air path structure is simple, which is easy to manufacture and implement. In addition, the connection and disconnection of the compressed gas and the cleaning air channel are controlled by the on-off control valve. When the on-off control valve is closed, the powder spraying will not pollute the air source. When cleaning is required, the on-off control valve can be opened. The structure is simple, which is conducive to manufacturing and implementation.

[0006] According to some embodiments of the present invention, the powder outlet is opened on the side wall of the powder box, the component seat is fixed to the outer side surface of the side wall of the powder box, and the powder outlet is connected to the powder inlet end of the powder outlet channel.

[0007] According to some embodiments of the present invention, the powder outlet hole and the powder outlet channel are coaxially arranged.

[0008] According to some embodiments of the present invention, the powder outlet channel is inclined relative to the horizontal direction and the powder outlet end is higher than the powder inlet end. The cleaning air channel extends vertically and is located at the lower side of the powder outlet channel. The upper and lower ends of the cleaning air channel are the air outlet end and the air inlet end of the cleaning air channel, respectively.

[0009] According to some embodiments of the present invention, the powder outlet hole is opened on the side wall of the powder box, and the powder outlet hole is docked with the powder inlet end of the powder outlet channel; the powder outlet hole and the powder outlet channel are coaxially arranged; the component seat is provided with an inserting protrusion, the inserting protrusion is a rib, the rib has a rib side surface inclined relative to the up and down directions, the powder outlet channel is a through hole opened on the rib side surface, and the outer side surface of the side wall of the powder box is provided with a matching groove adapted to the shape of the inserting protrusion, the matching groove has a groove surface, and the powder outlet hole is opened on the groove surface; the inserting protrusion is inserted into the matching groove, the rib side surface and the groove surface are in contact, and the orifice formed by the powder outlet channel on the rib side surface and the orifice formed by the powder outlet hole on the groove surface are docked with each other.

[0010] According to some embodiments of the present invention, the on-off control valve is fixed to the component seat, the on-off control valve is provided with an air outlet, the air outlet is connected to the air inlet end of the cleaning air channel, the on-off control valve is provided with an air inlet connector, and the cleaning air input component also includes an air inlet pipe, one end of the air inlet pipe is connected to the air inlet connector, and the other end is used to connect to the air source.

[0011] According to some embodiments of the present invention, the powder pump, the powder outlet channel, and the purge air channel are provided in multiple groups in a one-to-one correspondence, and the on-off control valve is provided in multiple groups and corresponds to the purge air channel in a one-to-one correspondence.

[0012] According to some embodiments of the present invention, the powder pumps are provided in plurality and arranged in a straight line, the powder pumps are plugged into the component seat, and the powder box is connected to a pressure rod, which presses the powder pumps arranged in a row against the powder box.

[0013] According to some embodiments of the present invention, the powder box is connected with two connecting rods corresponding to the two ends of the pressure rod respectively, and the connecting rod is provided with a locking mechanism for pressing the pressure rod toward the powder box. The two ends of the pressure rod are respectively provided with a clamping seat, and the clamping seat is provided with a plug-in slot, wherein the slot of the plug-in slot of one of the clamping seats is facing the axial direction of the pressure rod, and the slot of the plug-in slot of the other clamping seat is perpendicular to the axial direction of the pressure rod, and the two connecting rods are respectively clamped in the two plug-in slots.

[0014] According to some embodiments of the present invention, the powder box is connected to a positioning plate, and the positioning plate is provided with positioning recesses corresponding to the powder pumps one by one, and the powder pumps are clamped in the corresponding positioning recesses.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a structural diagram of an existing powder pump assembly;

[0018] Figure 2 A three-dimensional schematic diagram of an embodiment of the present utility model;

[0019] Figure 3 for Figure 2 A three-dimensional schematic diagram of the powder box assembly;

[0020] Figure 4 for Figure 3 A partial cross-sectional view of the structure shown;

[0021] Figure 5 A three-dimensional schematic diagram of a component seat according to an embodiment of the present invention;

[0022] Figure 6 This is a three-dimensional schematic diagram of the side wall of the powder box of an embodiment of the present utility model;

[0023] Figure 7 for Figure 3 A partial enlarged schematic diagram of the structure shown;

[0024] Figure 8 A three-dimensional schematic diagram of a positioning plate according to an embodiment of the present utility model;

[0025] Figure 9 This is a three-dimensional schematic diagram of a pressure rod according to an embodiment of the present utility model.

[0026] Reference numerals:

[0027] Front section powder outlet channel 1, rear section powder outlet channel 2, first cleaning gas input channel 3, second cleaning gas input channel 4, valve 5, powder pump 6;

[0028] Powder box 100, powder cavity 110, powder outlet 120, matching groove 130;

[0029] Powder pump assembly 200, assembly base 210, powder pump 220, powder outlet channel 211, purge air channel 212, plug-in protrusion 213;

[0030] Cleaning gas input assembly 300, on-off control valve 310, air inlet connector 311;

[0031] Pressing rod 400, card seat 410, plug-in card slot 411;

[0032] Connecting rod 500;

[0033] Locking mechanism 600;

[0034] Positioning plate 700 , positioning notch 710 . DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0039] Reference Figure 1 , which is a structural diagram of an existing powder pump assembly.

[0040] Reference Figures 2 to 9The present invention provides a powder supply center, which includes a powder box 100, a powder pump assembly 200 and a cleaning air input assembly 300. The powder box 100 is provided with a powder cavity 110, and the powder box 100 is provided with a powder outlet 120 communicating with the powder cavity 110. The powder pump assembly 200 includes an assembly seat 210 and a powder pump 220. The assembly seat 210 is arranged on the powder box 100, and the powder pump 220 is arranged on the assembly seat 210. The assembly seat 210 is provided with a powder outlet channel 211 and a cleaning air channel 212. The powder outlet channel 211 has a powder inlet end and a powder outlet end. The powder inlet end of the powder outlet channel 211 is connected to the powder outlet hole 120, and the powder outlet end of the powder outlet channel 211 is connected to the powder extraction end of the powder pump 220. The cleaning air channel 212 has an air inlet end and an air outlet end. The air outlet end of the cleaning air channel 212 passes through the channel wall of the powder outlet channel 211 and is connected to the powder outlet channel 211. The axis of the cleaning air channel 212 is arranged at an acute angle to the axis of the powder outlet channel 211, so that the air flow entering from the cleaning air channel 212 is biased to flow toward the powder outlet end side of the powder outlet channel 211. The cleaning gas input component 300 is connected to the component seat 210 and is used to input compressed gas to the cleaning gas channel 212. The cleaning gas input component 300 includes an on-off control valve 310, which is used to control the connection and disconnection between the input gas and the cleaning gas channel 212.

[0041] During normal operation of the powder supply center, the on-off control valve 310 shuts off the input gas, preventing the purge air passage 212 from receiving compressed gas. The powder pump 220 then extracts powder from the powder chamber 110 of the powder box 100 through the powder outlet passage 211 and the powder outlet hole 120 for external delivery. When purge powder is required, the on-off control valve 310 opens the compressed gas input, allowing the compressed gas to flow through the purge air passage 212 into the powder outlet passage 211. Because the powder outlet passage 211 and the purge air passage 212 are arranged at an acute angle, and the airflow is biased toward the powder outlet end of the powder outlet passage 211, the compressed gas can purge the powder path from the powder pump 220 to the external powder delivery hose. Furthermore, as the compressed gas flows into the powder path, the pressure also purges the powder along the path from the powder outlet passage 211 to the powder box 100, completing the purge powder path from the powder box 100 to the external powder delivery hose.

[0042] In actual usage scenarios, the length of the powder path from the powder pump 220 of the powder supply center to the spray gun in the spray booth is much longer than the length of the powder path from the powder pump 220 to the powder box 100. The powder supply center provided by the embodiment of the present invention mainly cleans the section of the powder path from the powder pump 220 to the external powder delivery pipe by compressed gas, and simultaneously completes the cleaning of the section of the powder path from the powder outlet channel 211 to the powder box 100 with the help of the effect of air pressure, thereby completing the powder spraying cleaning of the entire powder path. Since there are few air paths for inputting compressed gas, the overall air path structure is simple, which is easy to manufacture and implement. In addition, the connection and disconnection of the compressed gas and the cleaning air channel 212 are controlled by the on-off control valve 310. When the on-off control valve 310 is closed, the powder spraying will not pollute the air source. When cleaning is required, the on-off control valve 310 can be opened. The structure is simple and is conducive to manufacturing and implementation.

[0043] In this embodiment, the angle A is preferably 40 degrees. Of course, it is conceivable that the angle A is not limited to the above angles, and those skilled in the art can configure the angle size as needed.

[0044] In this embodiment, the powder outlet 120 is provided on the side wall of the powder box 100, and the assembly seat 210 is fixedly attached to the outer side of the side wall of the powder box 100. The powder outlet 120 is connected to the powder inlet end of the powder outlet channel 211. This structure is compact and can shorten the powder path from the powder outlet channel 211 to the powder box 100, achieving a powder-free connection, reducing residual powder and facilitating cleaning.

[0045] In an embodiment, the powder outlet hole 120 and the powder outlet channel 211 are coaxially arranged, so that the powder flows smoothly.

[0046] In the embodiment, the powder outlet channel 211 is tilted relative to the horizontal direction and the powder outlet end is higher than the powder inlet end. The purge air channel 212 extends vertically and is located on the lower side of the powder outlet channel 211. The upper and lower ends of the purge air channel 212 are the outlet and inlet ends of the purge air channel 212, respectively. With the above structure, it is convenient to open multiple groups of channels arranged horizontally side by side to correspond to multiple powder pumps 220 arranged horizontally. The powder inlet end of the tilted powder outlet channel 211 is lower, which can facilitate powder extraction close to the bottom of the powder chamber 110. The purge air channel 212 extends vertically and is located on the lower side of the powder outlet channel 211. The lower end of the purge air channel 212 is the inlet end, while the powder outlet end of the powder outlet channel 211 is its upper end. As a result, the powder pump 220 and the pipeline for supplying compressed gas can be connected to the component base 210 at the upper and lower sides, respectively, which is less likely to interfere with each other, has a regular layout, and is convenient for later maintenance.

[0047] It is conceivable that the powder outlet channel 211 and the cleaning air channel 212 are not limited to the above-mentioned structural layout. For example, the powder outlet channel 211 can also be horizontal in some embodiments, and the cleaning air channel 212 can also be arranged on the front and back sides or left and right sides of the powder outlet channel 211, as long as the acute angle between the cleaning air channel 212 and the powder outlet channel 211 is ensured and the air flow is biased toward the powder outlet end.

[0048] In the embodiment, the component seat 210 is provided with a plug-in protrusion 213, which is a rib having a rib side surface inclined relative to the up-down direction. The powder outlet channel 211 is a through hole opened on the rib side surface. The outer side surface of the box side wall of the powder box 100 is provided with a matching groove 130 that is adapted to the shape of the plug-in protrusion 213. The matching groove 130 has a groove surface, and the powder outlet hole 120 is opened on the groove surface. The plug-in protrusion 213 is inserted into the matching groove 130, and the rib side surface and the groove surface are in contact with each other. The opening formed by the powder outlet channel 211 on the rib side surface and the opening formed by the powder outlet hole 120 on the groove surface are connected to each other. With the above structure, on the one hand, the matching of the plug-in protrusion 213 and the matching groove 130 can ensure accurate installation and positioning between the component seat 210 and the powder box 100. On the other hand, the plug-in protrusion 213 is a rib, and the matching groove 130 is adapted to the shape of the rib. By setting the rib side surface and the groove surface, the inclined powder outlet channel 211 and the powder outlet hole 120 can be easily processed.

[0049] In an embodiment, an on-off control valve 310 is fixed to the assembly base 210. The on-off control valve 310 is provided with an air outlet, which is connected to the air inlet end of the cleaning gas channel 212. The on-off control valve 310 is provided with an air inlet connector 311. The cleaning gas input assembly 300 also includes an air inlet pipe, one end of which is connected to the air inlet connector 311, and the other end is used to connect to the air source. Using the above structure, the on-off control valve 310 and the assembly base 210 are connected together to form an assembly, which has a compact structure. No pipeline connection is required between the on-off control valve 310 and the assembly base 210, thereby facilitating assembly. Of course, it is conceivable that in some embodiments, the on-off control valve 310 may not be directly connected to the assembly base 210. For example, the on-off control valve 310 is set elsewhere, and the air outlet and air inlet of the on-off control valve 310 are respectively connected to the assembly base 210 and the air source via air pipes. In the embodiment, the on-off control valve 310 may adopt a pinch valve, a solenoid valve, a butterfly valve, etc., and the specific structure may be selected according to actual conditions, as long as the structure can control the on-off of the gas path.

[0050] In the embodiment, multiple groups of powder pumps 220, powder outlet channels 211, and purge air channels 212 are provided in a one-to-one correspondence, and multiple on-off control valves 310 are provided, each corresponding to a purge air channel 212. With the above structure, by providing a separate on-off control valve 310 for each purge air channel 212, the powder outlet channels 211 and purge air channels 212 of each group can be independent of each other, thereby reducing mutual influence.

[0051] In this embodiment, the powder pumps 220 are arranged in a straight line and plugged into the assembly base 210. A pressure rod 400 is connected to the powder box 100, which presses the row of powder pumps 220 against the powder box 100. This structure facilitates the installation and fixation of multiple powder pumps 220. In this embodiment, the powder pumps 220 are provided with a powder extraction end, and the assembly base 210 is provided with a corresponding socket. The powder extraction end plugs into the socket, allowing the powder pumps 220 to be plugged into and installed in the assembly base 210. Of course, it is conceivable that the powder pumps 220 can also be plugged into and into the assembly base 210 through other locations.

[0052] In an embodiment, the powder box 100 is connected to two connecting rods 500 corresponding to the two ends of the pressure rod 400 respectively. The connecting rod 500 is provided with a locking mechanism 600 for pressing the pressure rod 400 toward the powder box 100. The two ends of the pressure rod 400 are respectively provided with a clamping seat 410, and the clamping seat 410 is provided with a plug-in slot 411. The notch of the plug-in slot 411 of one clamping seat 410 is facing the axial direction of the pressure rod 400, and the notch of the plug-in slot 411 of the other clamping seat 410 is perpendicular to the axial direction of the pressure rod 400. The two connecting rods 500 are respectively clamped in the two plug-in slots 411. With the above structure, the slots 411 at both ends of the pressure rod 400 are perpendicular to each other, which can form card limits in different directions, and the position of the pressure rod 400 is stable; the locking of the pressure rod 400 is achieved by the locking mechanism 600 on the connecting rod 500, and the pressure rod 400 is firmly pressed against the powder pump 220.

[0053] In an embodiment, the locking mechanism 600 may employ a cam handle to press against and tighten the compression rod 400. Of course, it is conceivable that the locking mechanism 600 is not limited to the above structure. For example, the locking mechanism 600 may employ a nut member that is threadedly connected to the connecting rod 500 and presses the compression rod 400 through the nut member.

[0054] In the embodiment, the powder box 100 is connected to a positioning plate 700. The positioning plate 700 is provided with a positioning notch 710 corresponding one-to-one with the powder pump 220. The powder pump 220 is locked into the corresponding positioning notch 710. This structure can position the powder pump 220, making installation more convenient and accurate. In the embodiment, the powder pump 220 is provided with an air inlet end, and the positioning notch 710 specifically engages with the air inlet end. Of course, it is conceivable that the positioning notch 710 can also engage with other parts of the powder pump 220, and the specific configuration can be based on actual conditions.

[0055] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A powder supply center, characterized in that: include: A powder box (100) is provided with a powder cavity (110), and the powder box (100) is provided with a powder outlet (120) communicating with the powder cavity (110); The powder pump assembly (200) comprises an assembly seat (210) and a powder pump (220), wherein the assembly seat (210) is arranged on the powder box (100), and the powder pump (220) is arranged on the assembly seat (210), and the assembly seat (210) is provided with a powder outlet channel (211) and a cleaning air channel (212), wherein the powder outlet channel (211) has a powder inlet end and a powder outlet end, wherein the powder inlet end of the powder outlet channel (211) is communicated with the powder outlet hole (120), and the powder outlet channel (211) is connected to the powder outlet hole (120). The powder outlet end is communicated with the powder extraction end of the powder pump (220); the cleaning air channel (212) has an air inlet end and an air outlet end; the air outlet end of the cleaning air channel (212) penetrates the channel wall of the powder outlet channel (211) and is communicated with the powder outlet channel (211); the axis of the cleaning air channel (212) and the axis of the powder outlet channel (211) are arranged at an acute angle, so that the airflow entering from the cleaning air channel (212) flows toward the powder outlet end of the powder outlet channel (211); A cleaning gas input assembly (300) is connected to the assembly seat (210) and is used to input compressed gas into the cleaning gas channel (212). The cleaning gas input assembly (300) includes an on-off control valve (310). The on-off control valve (310) is used to control the connection and disconnection between the input gas and the cleaning gas channel (212).

2. The powder supply center according to claim 1, characterized in that: The powder outlet hole (120) is opened on the side wall of the powder box (100), the component seat (210) is fixed to the outer side surface of the side wall of the powder box (100), and the powder outlet hole (120) is connected to the powder inlet end of the powder outlet channel (211).

3. The powder supply center according to claim 2, characterized in that: The powder outlet hole (120) and the powder outlet channel (211) are coaxially arranged.

4. The powder supply center according to claim 1, characterized in that: The powder outlet channel (211) is arranged obliquely relative to the horizontal direction, and the powder outlet end is located higher than the powder inlet end. The clean air channel (212) extends vertically and is located at the lower side of the powder outlet channel (211). The upper and lower ends of the clean air channel (212) are the air outlet end and the air inlet end of the clean air channel (212), respectively.

5. The powder supply center according to claim 4, characterized in that: The powder outlet hole (120) is provided on the side wall of the powder box (100), and the powder outlet hole (120) is connected to the powder inlet end of the powder outlet channel (211); the powder outlet hole (120) and the powder outlet channel (211) are coaxially arranged; the component seat (210) is provided with a plug-in protrusion (213), and the plug-in protrusion (213) is a rib, and the rib has a rib side inclined relative to the up and down direction, and the powder outlet channel (211) is a through hole provided on the side of the rib, and the powder outlet channel (211) is a through hole provided on the side of the rib. The outer side surface of the box side wall of the box (100) is provided with a matching groove (130) that is adapted to the shape of the plug-in protrusion (213), and the matching groove (130) has a groove surface, and the powder outlet hole (120) is provided on the groove surface; the plug-in protrusion (213) is inserted into the matching groove (130), the side surface of the rib and the groove surface are in contact with each other, and the opening of the powder outlet channel (211) formed on the side surface of the rib and the opening of the powder outlet hole (120) formed on the groove surface are connected to each other.

6. The powder supply center according to claim 1, characterized in that: The on-off control valve (310) is fixed to the component seat (210), and the on-off control valve (310) is provided with an air outlet, and the air outlet is communicated with the air inlet end of the cleaning air channel (212). The on-off control valve (310) is provided with an air inlet connector (311), and the cleaning air input component (300) further includes an air inlet pipe, one end of the air inlet pipe is connected to the air inlet connector (311), and the other end is used for connecting to an air source.

7. The powder supply center according to claim 1, characterized in that: The powder pump (220), the powder outlet channel (211), and the cleaning air channel (212) are provided in multiple groups in a one-to-one correspondence, and the on-off control valve (310) is provided in multiple groups and corresponds to the cleaning air channel (212) in a one-to-one correspondence.

8. The powder supply center according to claim 1, characterized in that: The powder pumps (220) are provided in plurality and arranged in a straight line. The powder pumps (220) are plugged into and matched with the component seat (210). The powder box (100) is connected with a pressure rod (400). The pressure rod (400) presses the powder pumps (220) arranged in a row against the powder box (100).

9. The powder supply center according to claim 8, characterized in that: The powder box (100) is connected to two connecting rods (500) corresponding to the two ends of the pressure rod (400), and the connecting rod (500) is provided with a locking mechanism (600) for pressing the pressure rod (400) toward the powder box (100). The two ends of the pressure rod (400) are respectively provided with a clamping seat (410), and the clamping seat (410) is provided with a plug-in slot (411), wherein the notch of the plug-in slot (411) of one of the clamping seats (410) faces the axial direction of the pressure rod (400), and the notch of the plug-in slot (411) of the other clamping seat (410) faces perpendicular to the axial direction of the pressure rod (400), and the two connecting rods (500) are respectively clamped in the two plug-in slots (411).

10. The powder supply center according to claim 8, characterized in that: The powder box (100) is connected to a positioning plate (700), and the positioning plate (700) is provided with positioning recesses (710) corresponding to the powder pumps (220) one by one, and the powder pumps (220) are clamped in the corresponding positioning recesses (710).

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