Powder feeding pump

Abstract

The utility model discloses a powder feeding pump which comprises a pump body, and the pump body comprises two cavity seats, two upper valves, two lower valves, an upper output seat and a lower input seat. The upper valve is fixed at the upper end of the cavity seat, the two lower valves are arranged in parallel left and right, and the lower valves are fixed at the lower end of the cavity seat. The upper output base is provided with a main powder feeding channel and two upper branch channels, one ends of the upper branch channels are communicated with the upper end of the powder pumping cavity through the upper valves, the other ends of the two upper branch channels are communicated to the main powder feeding channel, and the upper output base is fixed to the upper ends of the two upper valves. The lower input base is provided with a main powder pumping channel and two lower branch channels, one ends of the lower branch channels are communicated with the lower end of the powder pumping cavity through the lower valves, the other ends of the two lower branch channels are communicated to the main powder pumping channel, and the lower input base is fixed to the lower ends of the two lower valves. The two cavity seats, the two upper valves, the two lower valves, the upper output seat and the lower input seat are connected to form a bar-shaped rigid body. According to the powder feeding pump, the use of powder pipes and joints can be reduced.

Description

Technical Field

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

[0002] There is a powder feeding pump for a powder supply center, which is used to suck powder and transport it to the powder box of the powder supply center. The powder feeding pump includes two powder cylinders, each of which is provided with a powder pumping chamber. The upper and lower ends of the two powder cylinders are connected to control valves for controlling the inflow and outflow of powder, and the two powder cylinders are connected through powder pipes to form an input powder circuit and an output powder circuit. During operation, the two powder cylinders are evacuated and inflated in turn, and at the same time, the opening and closing control of the control valve is used to enable the powder feeding pump to continuously suck powder and transport it to the powder supply center. The above-mentioned powder feeding pump needs to be connected through a powder pipe and a joint to form an input powder circuit and an output powder circuit, which is troublesome to install and set up, and the powder pipe is prone to powder jamming at the connection joint, which makes subsequent cleaning troublesome. In addition, the overall structure of the powder cylinder and the powder pipe connected thereto is loose, which makes installation and setting up troublesome. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a powder feeding pump that can reduce the use of powder pipes and joints. The pump body of the powder feeding pump itself forms a rod-shaped rigid body with a stable structure.

[0004] According to the powder feeding pump of the embodiment of the present invention, it includes a pump body, which includes: two cavity seats, which are arranged side by side on the left and right, and the cavity seats are provided with a pump powder cavity and an air port connected to the pump powder cavity; two upper valves, which are arranged side by side on the left and right and correspond one to one with the two cavity seats, and the upper valves are fixed to the upper ends of the corresponding cavity seats; two lower valves, which are arranged side by side on the left and right and correspond one to one with the two cavity seats, and the lower valves are fixed to the lower ends of the corresponding cavity seats; an upper output seat is provided with a main powder feeding channel and two upper branch channels, and the upper branch channels correspond one to one with the upper valves and the pump powder cavity, and one end of the upper branch channel passes through the corresponding upper valve. The valve is connected to the upper end of the corresponding powder pump chamber, the other end of the two upper branch channels is connected to the total powder feeding channel, and the upper output seat is fixed to the upper ends of the two upper valves; the lower input seat is provided with a total powder extraction channel and two lower branch channels, the lower branch channels correspond one-to-one with the lower valve and the powder pump chamber, one end of the lower branch channel is connected to the lower end of the corresponding powder pump chamber through the corresponding lower valve, the other end of the two lower branch channels is connected to the total powder extraction channel, and the lower input seat is fixed to the lower ends of the two lower valves; wherein, the two chamber seats, the two upper valves, the two lower valves, the upper output seat and the lower input seat are connected to form a rod-shaped rigid body.

[0005] The powder feeding pump according to the embodiment of the present invention has at least the following beneficial effects: the above-mentioned powder feeding pump, by providing an upper output seat and a lower input seat, and opening a powder spraying channel thereon, and at the same time connecting the cavity seat, the upper valve, the lower valve, the upper output seat and the lower input seat to form a rod-shaped rigid body, thereby avoiding the need to form a powder path through a powder hose and a joint, and the rod-shaped rigid body formed by the pump body as a whole has a stable structure and can stably support itself, thereby facilitating the installation and setting of the powder feeding pump.

[0006] According to some embodiments of the present invention, the upper output seat is provided with an upper joint tube, the upper joint tube is provided with a powder outlet connected to the total powder feeding channel, the lower input seat is provided with a lower joint tube, the lower joint tube is provided with a powder inlet connected to the total powder extraction channel, and the upper joint tube and the lower joint tube are inclined relative to the up and down directions.

[0007] According to some embodiments of the present invention, the upper joint pipe and the lower joint pipe are straight pipes arranged along the length direction of the pump body, and the pump body as a whole is inclined relative to the up and down direction.

[0008] According to some embodiments of the present invention, the powder feeding pump also includes an air circuit box shell and an electrical box shell, which are respectively fixed to the front and rear end faces of the pump body. Air circuit components are arranged in the air circuit box shell, and electronic control components are arranged in the electrical box shell.

[0009] According to some embodiments of the present invention, the left and right widths of the air circuit box shell and the electrical box shell are greater than the left and right widths of the pump body. The end face of the air circuit box shell corresponding to the pump body, the end face of the electrical box shell corresponding to the pump body, and the end faces of the pump body in the left and right directions form a pipeline groove, and the side walls of the pipeline groove are provided with pipe joints and / or through holes.

[0010] According to some embodiments of the present invention, the powder feeding pump further includes a decorative shell, and the decorative shell cover is arranged on the pipeline groove.

[0011] According to some embodiments of the present invention, the air circuit box shell includes a first bottom shell and a first cover shell. The first bottom shell is fixed to one of the end faces of the pump body in the front-to-back direction. The air circuit components are arranged on the first bottom shell. The first cover shell is detachably installed on the first bottom shell and covers the air circuit components.

[0012] According to some embodiments of the present invention, the electrical box shell includes a second bottom shell and a second cover shell. The second bottom shell is fixed to the other end face of the pump body in the front-to-back direction. The electronic control components are arranged on the second bottom shell. The second cover shell can be detachably installed on the second bottom shell and covers the electronic control components.

[0013] According to some embodiments of the present invention, the upper output seat includes an upper main seat, an upper branch seat and two upper joint seats, the upper main seat is fixed to the upper end of the upper branch seat, the two upper joint seats are arranged side by side on the left and fixed to the lower end of the upper branch seat, the two upper joint seats correspond one to one with the two upper valves, the upper joint seat is fixed to the upper ends of the corresponding upper valves, the total powder delivery channel and the two upper branch channels are sectionally opened in the upper main seat, the upper branch seat and the two upper joint seats; the lower input seat includes a lower main seat, a lower branch seat and two lower joint seats, the lower main seat is fixed to the lower end of the lower branch seat, the two lower joint seats are arranged side by side on the left and fixed to the upper end of the lower branch seat, the two lower joint seats correspond one to one with the two lower valves, the lower joint seat is fixed to the lower ends of the corresponding lower valves, the total powder extraction channel and the two lower branch channels are sectionally opened in the lower main seat, the lower branch seat and the two lower joint seats.

[0014] According to some embodiments of the present invention, the cavity seat includes a main body seat and two connecting seats, the two connecting seats are respectively fixed to the upper and lower ends of the main body seat, and the air port is opened in the connecting seats.

[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 A three-dimensional schematic diagram of an embodiment of the utility model;

[0018] Figure 2 This is an exploded diagram of an embodiment of the present utility model;

[0019] Figure 3 This is an exploded schematic diagram of the pump body according to an embodiment of the present utility model;

[0020] Figure 4 A cross-sectional view of an embodiment of the present utility model;

[0021] Figure 5 This is a three-dimensional schematic diagram of an embodiment of the utility model with the decorative shell removed;

[0022] Figure 6 This is an exploded schematic diagram of the upper output seat of an embodiment of the present utility model;

[0023] Figure 7 This is an exploded schematic diagram of the lower input seat of an embodiment of the present utility model;

[0024] Figure 8 It is a three-dimensional schematic diagram of the cavity seat according to an embodiment of the present utility model.

[0025] Reference numerals:

[0026] Pump body 100, cavity seat 110, powder pump cavity 111, air port 112, upper valve 120, lower valve 130, upper output seat 140, main powder feeding channel 141, upper branch channel 142, lower input seat 150, main powder extraction channel 151, lower branch channel 152, upper joint pipe 143, lower joint pipe 153, upper main channel seat 144, upper branch channel seat 145, upper joint seat 146, lower main channel seat 154, lower branch channel seat 155, lower joint seat 156, main body seat 113, connecting seat 114;

[0027] Air circuit case 200, first bottom case 210, first cover case 220;

[0028] Electrical box shell 300, second bottom shell 310, second cover shell 320;

[0029] Pipeline duct 400;

[0030] Decorative shell 500. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Reference Figures 1 to 8 A powder feeding pump includes a pump body 100, an air circuit box shell 200, an electrical box shell 300 and a decorative shell 500.

[0036] The pump body 100 includes two chamber seats 110, two upper valves 120, two lower valves 130, an upper output seat 140, and a lower input seat 150. The two chamber seats 110 are arranged side by side, each with a powder pumping chamber 111 and an air port 112 communicating with the chamber 111. The two upper valves 120 are arranged side by side, corresponding one-to-one with the two chamber seats 110, and are fixed to the upper ends of their corresponding chamber seats 110. The two lower valves 130 are arranged side by side, corresponding one-to-one with the two chamber seats 110, and are fixed to the lower ends of their corresponding chamber seats 110. The upper output seat 140 defines a main powder delivery channel 141 and two upper branch channels 142. The upper branch channels 142 correspond one-to-one with the upper valves 120 and the powder pumping chambers 111. One end of each upper branch channel 142 communicates with the upper end of the corresponding powder pumping chamber 111 through the corresponding upper valve 120, and the other ends of the two upper branch channels 142 communicate with the main powder delivery channel 141. The upper output seat 140 is fixed to the upper ends of the two upper valves 120. The lower input seat 150 defines a main powder extraction channel 151 and two lower branch channels 152. The lower branch channels 152 correspond one-to-one with the lower valves 130 and the powder pumping chambers 111. One end of each lower branch channel 152 communicates with the lower end of the corresponding powder pumping chamber 111 through the corresponding lower valve 130, and the other ends of the two lower branch channels 152 communicate with the main powder extraction channel 151. The lower input seat 150 is fixed to the lower ends of the two lower valves 130. The two chamber seats 110 , the two upper valves 120 , the two lower valves 130 , the upper output seat 140 and the lower input seat 150 are connected to form a rod-shaped rigid body.

[0037] When the powder feeding pump is working, it can alternately evacuate and inflate the powder pumping chambers 111 of the two chamber seats 110 through the air port 112, control the upper valve 120 of the corresponding evacuated powder pumping chamber 111 to be closed and the lower valve 130 to be opened. Under the action of negative pressure, external powder can be drawn into the evacuated powder pumping chamber 111 through the main powder extraction channel 151 of the lower input seat 150 and the corresponding lower branch channel 152, and control the upper valve 120 of the corresponding inflated powder pumping chamber 111 to be opened and the lower valve 130 to be closed. Under the action of positive pressure, the powder previously sucked into the powder pumping chamber 111 is transported to the powder supply center through the upper branch channel 142 and the main powder feeding channel 141 corresponding to the upper output seat 140.

[0038] The above-mentioned powder feeding pump is provided with an upper output seat 140 and a lower input seat 150, and a powder spraying channel is opened thereon. At the same time, the cavity seat 110, the upper valve 120, the lower valve 130, the upper output seat 140 and the lower input seat 150 are connected to form a rod-shaped rigid body, thereby avoiding the need to form a powder path through a powder hose and a joint. Moreover, the rod-shaped rigid body formed by the entire pump body has a stable structure and can stably support itself, thereby facilitating the installation of the powder feeding pump.

[0039] In the embodiment, the upper valve 120 and the lower valve 130 can adopt pinch valves. Of course, it is conceivable that the upper valve 120 and the lower valve 130 are not limited to adopting pinch valves. In this field, there are many implementation methods of valves that control the opening and closing of channels, and those skilled in the art can configure them according to actual conditions.

[0040] In this embodiment, the upper output seat 140 is provided with an upper joint pipe 143, which is provided with a powder outlet connected to the main powder feeding channel 141. The lower input seat 150 is provided with a lower joint pipe 153, which is provided with a powder inlet connected to the main powder extraction channel 151. The upper joint pipe 143 and the lower joint pipe 153 are arranged at an angle relative to the vertical direction. When connecting external pipes, the powder extraction pipe and powder feeding pipe corresponding to the upper joint pipe 143 and the lower joint pipe 153 can be connected to the upper joint pipe 143 and the lower joint pipe 153 on the side of the upper joint pipe 143 and the lower joint pipe 153 that is inclined, thereby reducing the bending of the powder pipe and making the powder spraying and delivery smoother.

[0041] In the embodiment, the upper and lower joint tubes 143, 153 are straight tubes extending along the length of the pump body 100, and the pump body 100 as a whole is tilted relative to the vertical direction. With this structure, the tilting of the entire pump body 100 allows the upper and lower joint tubes 143, 153 to be tilted, making implementation easier. Of course, it is conceivable that in some embodiments, this can be achieved by installing tilted joint tubes without requiring the entire pump body 100 to be tilted.

[0042] In this embodiment, the air circuit housing 200 and the electrical enclosure 300 are respectively fixed to the front and rear ends of the pump body 100. The air circuit components are housed in the air circuit housing 200, while the electrical enclosure 300 houses the electronic control components. This structure allows for the separation of the electronic control components from the air circuit components, improving the explosion-proof performance of the equipment and enhancing safety.

[0043] In this embodiment, the left-right width of the air circuit housing 200 and the electrical box housing 300 is greater than the left-right width of the pump body 100. The end face of the air circuit housing 200 corresponding to the pump body 100, the end face of the electrical box housing 300 corresponding to the pump body 100, and the left-right end faces of the pump body 100 enclose a pipeline groove 400. The sidewalls of the pipeline groove 400 are provided with pipe joints and / or vias. With this structure, the pipeline groove 400 can be used to accommodate pipelines, and the necessary pipe joints or vias are provided on the sidewalls of the pipeline groove 400, so that the inlet and outlet pipelines are arranged in a regular manner.

[0044] In the embodiment, the decorative shell 500 is covered on the pipeline groove 400, thereby reducing the exposure of the pipeline, better protecting the pipeline, and regularizing the pipeline layout.

[0045] In this embodiment, pipeline inlets and outlets are retained between the decorative housing 500 and the air circuit housing 200 and the electrical equipment housing 300, thereby ensuring that pipelines can enter and exit the pipeline trough 400. In this embodiment, the decorative housing 500 is detachably connected to the air circuit housing 200 and the electrical equipment housing 300 at both ends. Specifically, the decorative housing 500 can be inserted into the ends of the pipeline trough 400 and secured by threaded fasteners passing through the sidewalls of the pipeline trough 400. Of course, it is conceivable that the decorative housing 500 can also adopt other structures for installation and removal, and the specific configuration can be based on actual conditions.

[0046] In an embodiment, the air circuit housing 200 includes a first base housing 210 and a first cover housing 220. The first base housing 210 is fixedly attached to one of the front-to-back end faces of the pump body 100. The air circuit components are disposed in the first base housing 210. The first cover housing 220 is removably mounted to the first base housing 210 and houses the air circuit components. In an embodiment, the electrical equipment housing 300 includes a second base housing 310 and a second cover housing 320. The second base housing 310 is fixedly attached to the other front-to-back end face of the pump body 100. The electronic control components are disposed in the second base housing 310. The second cover housing 320 is removably mounted to the second base housing 310 and houses the electronic control components. In an embodiment, the second cover housing 320 is provided with a display screen and buttons. With this structure, the air circuit components and the electronic control components can be easily accessed and maintained by removing the first and second cover housings 220 and 320. In the embodiment, the gas circuit components are, for example, gas circuit control valves, gas circuit accessories, etc., and the electronic control components are, for example, PLCs, control circuit boards, etc.

[0047] In the embodiment, the upper output seat 140 includes an upper main seat 144, an upper branch seat 145 and two upper joint seats 146. The upper main seat 144 is fixed to the upper end of the upper branch seat 145. The two upper joint seats 146 are arranged side by side on the left and right and fixed to the lower end of the upper branch seat 145. The two upper joint seats 146 correspond to the two upper valves 120 one by one. The upper joint seats 146 are fixed to the upper ends of the corresponding upper valves 120. The total powder feeding channel 141 and the two upper branch channels 142 are segmented and opened on the upper main seat 144, the upper branch seat 145 and the two upper joint seats 1 46; The lower input seat 150 includes a lower main seat 154, a lower branch seat 155, and two lower joint seats 156. The lower main seat 154 is fixed to the lower end of the lower branch seat 155. The two lower joint seats 156 are arranged side by side on the left and right and fixed to the upper end of the lower branch seat 155. The two lower joint seats 156 correspond to the two lower valves 130 one by one. The lower joint seats 156 are fixed to the lower ends of the corresponding lower valves 130. The main powder extraction channel 151 and the two lower branch channels 152 are sectionally opened in the lower main seat 154, the lower branch seat 155, and the two lower joint seats 156. Using the above structure, the upper output seat 140 and the lower input seat 150 are manufactured as a plurality of seat bodies, and the corresponding channels are sectionally opened in each separate seat body, thereby facilitating the processing of the channels.

[0048] In this embodiment, the upper main circuit seat 144 is provided with a triangular ridge, and the upper branch circuit seat 145 is provided with a matching triangular groove. The triangular ridge and the triangular groove are plugged into each other. The lower main circuit seat 154 and the lower branch circuit seat 155 are provided with similar structures. This structure can facilitate the creation of a Y-shaped channel to form a structure with two branch channels and a converging channel, which is easy to process.

[0049] In the embodiment, the cavity seat 110 includes a main body seat 113 and two connecting seats 114 . The two connecting seats 114 are respectively fixed to the upper and lower ends of the main body seat 113 , and the air port 112 is opened in the connecting seats 114 .

[0050] 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.

[0051] 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 feeding pump, characterized in that: The invention comprises a pump body (100), wherein the pump body (100) comprises: Two cavity seats (110) are arranged side by side on the left and right, and the cavity seats (110) are provided with a powder pumping cavity (111) and an air port (112) communicating with the powder pumping cavity (111); Two upper valves (120) are arranged side by side on the left and right and correspond to the two cavity seats (110) one by one, and the upper valves (120) are fixed to the upper ends of the corresponding cavity seats (110); Two lower valves (130) are arranged side by side on the left and right and correspond to the two cavity seats (110) one by one, and the lower valves (130) are fixed to the lower ends of the corresponding cavity seats (110); The upper output seat (140) is provided with a main powder feeding channel (141) and two upper branch channels (142), the upper branch channels (142) corresponding to the upper valve (120) and the powder pumping chamber (111) one by one, one end of the upper branch channel (142) is connected to the upper end of the corresponding powder pumping chamber (111) through the corresponding upper valve (120), and the other ends of the two upper branch channels (142) are connected to the main powder feeding channel (141), and the upper output seat (140) is fixed to the upper ends of the two upper valves (120); The lower input seat (150) is provided with a main powder pumping channel (151) and two lower branch channels (152), wherein the lower branch channels (152) correspond to the lower valve (130) and the powder pumping chamber (111) one by one, one end of the lower branch channel (152) is connected to the lower end of the corresponding powder pumping chamber (111) through the corresponding lower valve (130), and the other ends of the two lower branch channels (152) are connected to the main powder pumping channel (151), and the lower input seat (150) is fixed to the lower ends of the two lower valves (130); The two chamber seats (110), the two upper valves (120), the two lower valves (130), the upper output seat (140) and the lower input seat (150) are connected to form a rod-shaped rigid body.

2. The powder feeding pump according to claim 1, characterized in that: The upper output seat (140) is provided with an upper joint pipe (143), and the upper joint pipe (143) is provided with a powder outlet connected to the main powder feeding channel (141); the lower input seat (150) is provided with a lower joint pipe (153), and the lower joint pipe (153) is provided with a powder inlet connected to the main powder extraction channel (151); the upper joint pipe (143) and the lower joint pipe (153) are arranged obliquely relative to the upper and lower directions.

3. The powder feeding pump according to claim 2, characterized in that: The upper joint pipe (143) and the lower joint pipe (153) are straight pipes arranged along the length direction of the pump body (100), and the pump body (100) is arranged as a whole at an inclination relative to the up and down directions.

4. The powder feeding pump according to claim 1, characterized in that: The powder feeding pump further comprises an air circuit case (200) and an electrical box case (300), wherein the air circuit case (200) and the electrical box case (300) are respectively fixed to the front and rear end surfaces of the pump body (100), air circuit components are arranged in the air circuit case (200), and electrical control components are arranged in the electrical box case (300).

5. The powder feeding pump according to claim 4, characterized in that: The left-right widths of the air circuit case (200) and the electrical box case (300) are greater than the left-right widths of the pump body (100); the end face of the air circuit case (200) corresponding to the pump body (100), the end face of the electrical box case (300) corresponding to the pump body (100), and the left-right end faces of the pump body (100) are enclosed to form a pipeline groove (400); the groove side walls of the pipeline groove (400) are provided with pipe joints and / or through holes.

6. The powder feeding pump according to claim 5, characterized in that: The powder feeding pump further comprises a decorative shell (500), and the decorative shell (500) is covered on the pipeline groove (400).

7. The powder feeding pump according to claim 4, characterized in that: The air circuit case (200) comprises a first bottom shell (210) and a first cover shell (220); the first bottom shell (210) is fixedly attached to one end face of the pump body (100) in the front-back direction; the air circuit components are arranged on the first bottom shell (210); and the first cover shell (220) is detachably mounted on the first bottom shell (210) and covers the air circuit components.

8. The powder feeding pump according to claim 4, characterized in that: The electrical box shell (300) includes a second bottom shell (310) and a second cover shell (320), wherein the second bottom shell (310) is fixedly attached to the other end face of the pump body (100) in the front-to-back direction, and the electronic control components are arranged on the second bottom shell (310), and the second cover shell (320) is detachably mounted on the second bottom shell (310) and covers the electronic control components.

9. The powder feeding pump according to claim 1, characterized in that: The upper output seat (140) includes an upper main seat (144), an upper branch seat (145) and two upper joint seats (146); the upper main seat (144) is fixed to the upper end of the upper branch seat (145); the two upper joint seats (146) are arranged side by side on the left and right and fixed to the lower end of the upper branch seat (145); the two upper joint seats (146) correspond to the two upper valves (120) one by one; the upper joint seats (146) are fixed to the upper ends of the corresponding upper valves (120); the main powder feeding channel (141) and the two upper branch channels (142) are opened in sections on the upper main seat (144), the upper branch seat (145) and the two upper joint seats (146); The lower input seat (150) includes a lower main seat (154), a lower branch seat (155) and two lower joint seats (156). The lower main seat (154) is fixed to the lower end of the lower branch seat (155). The two lower joint seats (156) are arranged side by side on the left and right and fixed to the upper end of the lower branch seat (155). The two lower joint seats (156) correspond to the two lower valves (130) one by one. The lower joint seats (156) are fixed to the lower ends of the corresponding lower valves (130). The main powder extraction channel (151) and the two lower branch channels (152) are opened in sections on the lower main seat (154), the lower branch seat (155) and the two lower joint seats (156).

10. The powder feeding pump according to claim 1, characterized in that: The cavity seat (110) comprises a main body seat (113) and two connecting seats (114). The two connecting seats (114) are respectively fixed to the upper and lower ends of the main body seat (113). The air port (112) is opened in the connecting seats (114).

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