Powder preparation equipment and powder preparation method

Abstract

The invention discloses powder making equipment. The powder making equipment comprises a feeding assembly, a refrigerating assembly, a grinder and a collecting assembly. The grinder is provided with a grinding cavity and a feeding port communicated with the grinding cavity, and the feeding port is located in the top of the grinding cavity. The feeding assembly and the refrigerating assembly are both communicated with the feeding port. The collecting assembly comprises a connecting pipe, a collecting box and a pressure relief pipe, one end of the connecting pipe is communicated with the feeding port, the other end of the connecting pipe is connected with the collecting box, and the pressure relief pipe is connected with the collecting box. By the adoption of the powder making equipment, materials are input into the grinding cavity through the feeding assembly, the materials are ground in the grinding cavity, and the refrigerating medium is input into the grinding cavity through the refrigerating assembly in the grinding process, so that the low-temperature environment in the grinding cavity is kept in the grinding process. In this way, the powder preparation equipment can be applied to powder preparation of metal with the high melting point. The invention also discloses a preparation method of the powder.

Description

Technical Field

[0001] The invention belongs to the technical field of powder preparation, and in particular relates to a powder making device and a powder preparation method. Background Art

[0002] Metal parts made of metal powder have many properties different from conventional materials, such as excellent mechanical and magnetic properties, high electrical conductivity and diffusion rate, high reactivity and catalytic activity, etc. These properties make metal powder more and more widely used. However, for some metals with high melting points, it is not convenient to prepare metal powder by smelting. Summary of the invention

[0003] The technical problem to be solved by the present invention is: for metals with high melting points that are not convenient to prepare powder by smelting, a powder making device and a powder preparation method that can be used to prepare metal powders with high melting points are provided.

[0004] The technical solution proposed by the present invention is: A flour milling device, comprising: A grinder, comprising a grinding chamber and a feed port connected to the grinding chamber, wherein the feed port is located at the top of the grinding chamber; A material supply component and a refrigeration component are both connected to the feed port, the material supply component is used to provide materials, and the refrigeration component is used to provide refrigeration medium; The collecting assembly comprises a connecting pipe, a collecting box and a pressure relief pipe. One end of the connecting pipe is communicated with the feed port, and the other end is connected to the collecting box. The pressure relief pipe is connected to the collecting box.

[0005] Furthermore, a collecting channel is formed in the collecting box, the collecting channel extends in a zigzag manner, both ends of the collecting channel are respectively connected to the connecting pipe and the pressure relief pipe, and the height of one end of the collecting channel connected to the connecting pipe is lower than that of one end of the collecting channel connected to the pressure relief pipe.

[0006] Furthermore, a plurality of baffles are provided in the collection box, and the plurality of baffles are arranged at intervals in the vertical direction to form the collection channel in the collection box, and the height of each baffle gradually decreases from one end connected to the inner wall of the collection box to the other opposite end.

[0007] Furthermore, the collecting assembly also includes a collecting pipe, which includes an exhaust section, a connecting section and a collecting section connected in sequence, and the exhaust section is located above the collecting section, one end of the pressure relief pipe away from the collecting box is connected to the connecting section, and the angle between the axial direction of the end of the pressure relief pipe away from the collecting box and the axial direction of the exhaust section does not exceed 90°.

[0008] Furthermore, an angle between the axial direction of one end of the pressure relief pipe away from the collecting box and the axial direction of the collecting section is not less than 90°.

[0009] Furthermore, an exhaust port is provided at one end of the exhaust section away from the connecting section; The powder making equipment further comprises a filter element, and the filter element is arranged at the exhaust port of the exhaust section.

[0010] Furthermore, the powder making equipment also includes a temperature measuring component, which is arranged on the grinder to detect the temperature in the grinding chamber.

[0011] Furthermore, the powder making equipment also includes a mounting part, which is arranged on the grinder, and the mounting part has a temperature measuring cavity and a temperature measuring hole and a mounting hole connected to the temperature measuring cavity, the temperature measuring hole is connected to the grinding cavity, and the aperture of the temperature measuring hole is smaller than the preset particle size of the powder; the temperature measuring part is sealingly connected to the mounting part, and the temperature measuring head of the temperature measuring part can extend into the temperature measuring cavity through the mounting hole.

[0012] Furthermore, the refrigeration component includes an input pipe, which is connected to the feed port; the temperature measuring head of the temperature measuring component extends into the feed port, and the outlet of the input pipe faces the grinding chamber and is staggered with the temperature measuring head.

[0013] A method for preparing a powder material comprises the steps of: S110, inputting a preset amount of material into the grinding chamber through the feeding assembly; S120, inputting a refrigerant medium into the grinding chamber through a refrigeration component to make the temperature in the grinding chamber reach a preset temperature; S130, grinding the material in the grinding chamber by a grinder; During the grinding process, the refrigeration component maintains the input of the refrigeration medium, and part of the powder is discharged from the feed port into the collecting component so that the powder is collected by the collecting component.

[0014] By using the above-mentioned powder making equipment and powder preparation method, the feeding component inputs the material into the grinding chamber, and the material is ground in the grinding chamber. During the grinding process, the refrigeration component inputs the refrigeration medium into the grinding chamber to maintain the low temperature environment in the grinding chamber during the grinding process. In this way, the powder making equipment is applied to the preparation of powders of metals with higher melting points. At the same time, during the grinding process, part of the powder will be discharged from the feed port to the connecting pipe, and then enter the collection box. Under the buffering effect of the collection box, the speed of the powder is slowed down, so that it is collected by the collection box, and the gas can be discharged through the pressure relief pipe. While ensuring the stability of the pressure in the grinding chamber, the splashed powder is collected, thereby avoiding the waste of powder, improving resource utilization, reducing material costs, and also reducing the pollution of the powder to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0016] Figure 1 A schematic diagram of the structure of a flour milling device provided in one embodiment of the present invention; Figure 2 for Figure 1 The schematic diagram of the structure of the grinder in the milling equipment shown; Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of the grinder shown; Figure 4 for Figure 3 The enlarged structural diagram of the cross-sectional structure shown at B; Figure 5 for Figure 1 A schematic diagram of the structure of the collecting component in the powder making equipment is shown.

[0017] Description of labels: 110. Feeding assembly; 111. Weighing silo; 112. Vibrating feeder; 113. Feeding pipe; 114. Feeding valve; 120. Refrigeration assembly; 121. Input pipe; 130. Grinder; 131. Grinding chamber; 132. Feed inlet; 133. Discharge valve; 135. Vibrating motor; 136. Vibrating grinding chamber; 140. Collecting assembly; 141. Connecting pipe; 142. Collecting box; 1421. Collecting channel; 143. Pressure relief pipe; 144. Baffle; 145. Collecting pipe; 1451. Exhaust section; 1452. Connecting section; 1453. Collecting section; 146. Control valve; 150. Temperature measuring component; 160. Mounting component; 161. Temperature measuring chamber; 162. Temperature measuring hole; 163. Mounting hole. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] On the one hand, the present application provides a powder making device, which can be used to prepare powder materials of metals with higher melting points.

[0021] like Figure 1 As shown, the powder making equipment includes a feeding component 110, a refrigeration component 120, a grinder 130 and a collection component 140. The feeding component 110 and the refrigeration component 120 are both connected to the grinder 130 to provide materials and refrigeration medium to the grinder 130 respectively; the grinder 130 is used to grind the materials into powder, and the refrigeration medium is used to keep the grinding environment in the grinder 130 at a low temperature; the collection component 140 is connected to the grinder 130 to achieve pressure relief of the grinder 130 and collect the powder splashed during the grinding process. Optionally, the material is preferably a metal with a higher melting point, and the refrigeration medium is preferably liquid nitrogen.

[0022] Please also Figures 2 to 4 Furthermore, the grinder 130 has a grinding chamber 131 and a feed port 132 connected to the grinding chamber 131, and the feed port 132 is located at the top of the grinding chamber 131; the feeding component 110 and the refrigeration component 120 are both connected to the feed port 132 to provide materials and refrigeration medium into the grinding chamber 131, and the collection component 140 is also connected to the feed port 132.

[0023] It should be explained that the refrigeration component 120 continuously inputs refrigeration medium during the grinding process to maintain the low temperature in the grinding chamber 131, and also makes the pressure in the grinding chamber 131 positive. The collection component 140 connected to the feed port 132 can relieve pressure to avoid excessive pressure in the grinding chamber 131.

[0024] Furthermore, the collecting assembly 140 includes a connecting pipe 141, a collecting box 142, and a pressure relief pipe 143. One end of the connecting pipe 141 is connected to the feed port 132, and the other end is connected to the collecting box 142. The pressure relief pipe 143 is connected to the collecting box 142. During the grinding process, part of the powder in the grinding chamber 131 will be discharged from the feed port 132 to the connecting pipe 141, and then enter the collecting box 142. The collecting box 142 buffers the powder to slow down the speed of the powder, so that the powder falls into the collecting box 142 and is collected by the collecting box 142.

[0025] With the above-mentioned powder making equipment, the feeding component 110 inputs the material into the grinding chamber 131, and the material is ground in the grinding chamber 131. During the grinding process, the refrigeration component 120 inputs the refrigeration medium into the grinding chamber 131 to maintain the low temperature environment in the grinding chamber 131 during the grinding process. In this way, the powder making equipment is applied to the preparation of powders of metals with higher melting points. At the same time, during the grinding process, part of the powder will be discharged from the feed port 132 to the connecting pipe 141, and then enter the collecting box 142. Under the buffering effect of the collecting box 142, the speed of the powder is slowed down, so that it is collected by the collecting box 142, and the gas can be discharged through the pressure relief pipe 143. While ensuring the stability of the pressure in the grinding chamber 131, the splashed powder is collected, thereby avoiding the waste of powder, improving the utilization rate of resources, reducing the material cost, and also reducing the pollution of the powder to the environment.

[0026] See also Figure 1 In one embodiment, the feeding assembly 110 includes a weighing bin 111, a vibrating feeder 112 and a feeding pipe 113. The weighing bin 111 is used to store and weigh materials. The vibrating feeder 112 is located between the weighing bin 111 and the feeding pipe 113, and is used to convey the materials output from the weighing bin 111 to the feeding pipe 113. The end of the feeding pipe 113 away from the vibrating feeder 112 is connected to the feed port 132, so as to input the materials into the grinding chamber 131. Furthermore, a feeding valve 114 is provided between the vibrating feeder 112 and the feeding pipe 113 to control the connection between the two, so as to control the feeding. Preferably, the end of the connecting pipe 141 away from the collecting box 142 extends into the feeding pipe 113 to communicate with the feed port 132.

[0027] It should be explained that the grinder 130 grinds a preset amount of material each time, so after the preset amount of material is input into the grinding chamber 131, the feeding valve 114 will cut off the connection between the vibrating feeder 112 and the feeding pipe 113, and the vibrating feeder 112 will also stop operating. Therefore, during the grinding process, the powder and gas discharged from the feeding port 132 will enter the connecting pipe 141.

[0028] See also Figure 1 and Figure 4In one embodiment, the refrigeration assembly 120 includes a refrigerator and an input pipe 121. The refrigerator is used to provide a refrigeration medium. One end of the input pipe 121 is connected to the refrigerator, and the other end is connected to the feed port 132, so that the refrigeration medium is input into the grinding chamber 131. It should be noted that when the refrigeration medium is liquid nitrogen, the liquid nitrogen will be gasified, so what is discharged from the feed port 132 is powder and gas. Preferably, the end of the input pipe 121 away from the refrigerator extends into the feeding pipe 113 to communicate with the feed port 132.

[0029] In conjunction with the connecting pipe 141, it should be noted that, in the present embodiment, the input pipe 121 and the connecting pipe 141 both extend into the feeding pipe 113. In other embodiments, a joint connected thereto may also be provided at the feed port 132, and the input pipe 121, the connecting pipe 141 and the feeding pipe 113 are all connected to the joint. The specific connection method is not limited herein.

[0030] In one embodiment, the feed port 132 is located at the top of the grinding chamber 131, and the grinder 130 is also provided with a discharge port connected to the grinding chamber 131, the discharge port is located at the end of the grinder 130 and at the bottom of the grinding chamber 131, and is used to discharge the powder in the grinding chamber 131 after the grinding is completed. Further, the grinder 130 also includes a discharge valve 133, which is arranged at the discharge port to control the opening and closing of the discharge port.

[0031] In one embodiment, the powder making equipment further includes a temperature measuring component 150, which is disposed on the grinder 130 to detect the temperature in the grinding chamber 131. In this way, the refrigeration component 120 can be operated according to the detection result of the temperature measuring component 150, thereby ensuring that the temperature in the grinding chamber 131 meets the grinding requirements. Furthermore, the temperature measuring head of the temperature measuring component 150 extends into the feed inlet 132, and the outlet of the input pipe 121 faces the grinding chamber 131 and is staggered with the temperature measuring head to avoid direct contact between the refrigeration medium and the temperature measuring head, thereby improving the accuracy of the temperature measuring component 150.

[0032] In one embodiment, the powder making equipment also includes a mounting member 160, which is arranged on the grinder 130, and the mounting member 160 has a temperature measuring chamber 161 and a temperature measuring hole 162 and a mounting hole 163 connected to the temperature measuring chamber 161, the temperature measuring hole 162 is connected to the grinding chamber 131, and the aperture of the temperature measuring hole 162 is smaller than the preset particle size of the powder; the temperature measuring member 150 is sealed and connected to the mounting member 160, and the temperature measuring head of the temperature measuring member 150 can extend into the temperature measuring chamber 161 through the mounting hole 163.

[0033] It should be noted that the aperture of the temperature measuring hole 162 is smaller than the preset particle size of the powder, which is the particle size that the powder needs to reach after grinding. In this way, during the temperature measurement process, the material can be prevented from being poured into the temperature measuring chamber 161, thereby preventing the material from directly contacting the temperature measuring element 150, thereby improving the accuracy of the temperature measurement.

[0034] Optionally, the mounting member 160 is disposed at the feed port 132 , and the temperature measuring hole 162 is also facing the grinding chamber 131 , thereby preventing the refrigeration medium from directly entering the temperature measuring chamber 161 and affecting the detection of the temperature measuring member 150 .

[0035] It should be explained that the temperature measurement of the temperature measuring element 150 is used to detect the grinding environment temperature of the grinding chamber 131, so the temperature measuring head of the temperature measuring element 150 needs to avoid direct contact with the refrigerant medium and the material to ensure the accuracy of the temperature measurement.

[0036] In one embodiment, the grinder 130 includes a vibration motor 135 and a vibration grinding chamber 136 . The vibration motor 135 is connected to the vibration grinding chamber 136 . The vibration grinding chamber 136 has the above-mentioned grinding chamber 131 , feed port 132 , and discharge port.

[0037] See also Figure 1 and Figure 5 In one embodiment, the connecting pipe 141 is connected to the side of the collecting box 142, and the pressure relief pipe 143 is connected to the top of the collecting box 142. The height of the connecting pipe 141 is lower than the height of the pressure relief pipe 143. The gas entering the collecting box 142 will be discharged through the pressure relief pipe 143, and the speed of the powder will be slowed down, so most of the powder will be deposited at the bottom of the collecting box 142, and very little will enter the pressure relief pipe 143 with the gas.

[0038] Furthermore, a collecting channel 1421 is formed in the collecting box 142, and the collecting channel 1421 extends in a zigzag manner. Both ends of the collecting channel 1421 are respectively connected to the connecting pipe 141 and the pressure relief pipe 143, and the height of one end of the collecting channel 1421 connected to the connecting pipe 141 is lower than that of one end of the collecting channel 1421 connected to the pressure relief pipe 143, thereby extending the gas flow path in the collecting box 142, improving the buffering effect on the powder, and further improving the collection effect on the powder.

[0039] In one embodiment, the collecting assembly 140 further includes a plurality of baffles 144, which are disposed in the collecting box 142 and arranged at intervals in the vertical direction to form the above-mentioned collecting channel 1421 in the collecting box 142. At the same time, the height of each baffle 144 gradually decreases from one end connected to the inner wall of the collecting box 142 to the other opposite end to improve the blocking effect on the powder and improve the collection effect on the powder.

[0040] Furthermore, the multiple baffles 144 include multiple first baffles 144 and multiple second baffles 144, and the multiple first baffles 144 and the multiple second baffles 144 are respectively arranged on the inner walls on opposite sides of the collecting box 142, and are alternately arranged in the vertical direction. One end of the first baffle 144 away from the inner wall of the collecting box 142 and one end of the second baffle 144 away from the collecting box 142 intersect in the vertical direction, that is, both pass through the middle position of the collecting box 142, so as to further enhance the blocking effect on the powder.

[0041] In one embodiment, the collection box 142 is also provided with a discharge port, and the discharge port is located at the bottom of the collection box 142. Furthermore, a discharge valve is also provided at the discharge port to control the opening and closing of the discharge port. After the collection of the powder is completed, the discharge port is opened by the discharge valve, and the powder in the collection box 142 is discharged and collected. It is understandable that, in order to facilitate the collection of the powder, a vibrator can also be provided on the collection box 142, and the vibrating of the vibrator can prevent the powder from adhering to the baffle 144 or the inner wall of the collection box 142, thereby improving the collection rate. At the same time, the bottom of the collection box 142 can also be set to a funnel shape, and the discharge port is located at the bottom, so as to facilitate the emptying of the powder.

[0042] In one embodiment, the collection assembly 140 further includes a collection pipe 145, which includes an exhaust section 1451, a connection section 1452, and a collection section 1453 connected in sequence, and the exhaust section 1451 is located above the collection section 1453. One end of the pressure relief pipe 143 away from the collection box 142 is connected to the connection section 1452, and the angle between the axial direction of the end of the pressure relief pipe 143 away from the collection box 142 and the axial direction of the exhaust section 1451 does not exceed 90°.

[0043] As the name implies, the collecting section 1453 can collect powder, and the exhaust section 1451 is used to discharge gas. It should also be explained that the angle between the axial direction of the end of the pressure relief pipe 143 away from the collecting box 142, i.e., the output direction of the material in the pressure relief pipe 143, and the axial direction of the exhaust section 1451, i.e., the conveying direction of the material in the exhaust section 1451, does not exceed 90°, which can further prevent the powder from entering the exhaust section 1451 and being discharged, thereby improving the collection rate of the powder.

[0044] Furthermore, the angle between the axial direction of the end of the pressure relief pipe 143 away from the collecting box 142 and the axial direction of the collecting section 1453 is not less than 90°, and the collecting section 1453 is located below the exhaust section 1451, so that the powder can enter the collecting section 1453 for collection. Figure 1In the illustrated embodiment, the exhaust section 1451, the connecting section 1452 and the collecting section 1453 all extend in the vertical direction, that is, the three are coaxial, and the end of the pressure relief pipe 143 away from the collecting box 142 extends in the horizontal direction, so that the axial direction of the exhaust section 1451 and the collecting section 1453 is perpendicular to the axial direction of the end of the pressure relief pipe 143 away from the collecting box 142.

[0045] In one embodiment, an exhaust port is provided at one end of the exhaust section 1451 away from the connecting section 1452, and the exhaust port is connected to the dust collection system; a discharge port is provided at one end of the collecting section 1453 away from the connecting section 1452; the powder making equipment also includes a filter element and a discharge valve, the filter element is arranged at the exhaust port for filtering the powder, and the discharge valve is arranged at the discharge port.

[0046] It should be noted that in other embodiments, a collecting bucket may be directly provided below the discharge port and the feed opening, or a sealing cover may be directly provided to seal the feed opening and the discharge port, without providing a discharge valve and a feed opening valve.

[0047] Furthermore, the collecting assembly 140 further includes a control valve 146, which is disposed on the pressure relief pipe 143 and is used to control the opening and closing of the pressure relief pipe 143. In this way, when the powder that has been splashed needs to be collected after the grinding is completed, the connection of the pressure relief pipe 143 can be disconnected by the control valve 146, and then the discharge valve can be opened to receive the powder. At the same time, air can be blown toward the filter element to blow off the powder on the filter element, thereby improving the collection rate of the powder.

[0048] The above embodiment has described the structure of the milling equipment. In order to further understand the technical solution of the present application, Figure 1 A powder material preparation method based on the powder making equipment is described.

[0049] The powder preparation method comprises the steps of: S110 , inputting a preset amount of material into the grinding chamber 131 through the feeding assembly 110 .

[0050] Specifically, after the feeding assembly 110 inputs a preset amount of material into the grinding chamber 131 , the feeding valve 114 is closed.

[0051] S120, inputting a refrigerant medium into the grinding chamber 131 through the refrigeration component 120, so that the temperature in the grinding chamber 131 reaches a preset temperature.

[0052] Specifically, the refrigeration assembly 120 cooperates with the temperature measuring component 150 to input liquid nitrogen into the grinding chamber 131 according to the detection result of the temperature measuring component 150 .

[0053] S130, grinding the material in the grinding chamber 131 by the grinder 130. During the grinding process, the refrigeration component 120 maintains the input of the refrigeration medium to ensure that the grinding chamber 131 maintains a low temperature state; part of the powder is discharged from the feed port 132 into the collection component 140, so that the powder is collected by the collection component 140.

[0054] Specifically, after the powder splashes out from the feed port 132, it enters the collecting box 142 through the connecting pipe 141, and the collecting box 142 blocks the powder, thereby achieving preliminary collection of the powder; then a small amount of powder is transported from the pressure relief pipe 143 to the collecting pipe 145, and the powder is collected again through the collecting pipe 145, which effectively improves the collection rate of the powder splashed from the feed port 132.

[0055] In summary, the powder making equipment and powder preparation method provided in this application have at least the following advantages: 1. The input of materials, the input of refrigeration medium, the detection of temperature and the pressure relief during the grinding process are all realized through the feed port 132, and there is no need to open more openings on the grinding chamber 131, thereby improving the strength of the grinder 130 and thus improving the reliability of use; 2. The temperature measuring element 150 measures the temperature of the grinding chamber 131 through the mounting element 160. The temperature measuring hole 162 provided on the mounting element 160 is smaller than the preset particle size required by the powder, and the input pipe 121 of the refrigeration component 120 is staggered from the temperature measuring hole 162, thereby avoiding the temperature measuring head of the temperature measuring element 150 from contacting the material and the refrigeration medium, thereby improving the accuracy of the temperature measurement; 3. The collecting assembly 140 is connected to the feed port 132 to collect the powder splashed from the feed port 132 during the grinding process, thereby reducing the waste of materials and improving the resource utilization rate; 4. A zigzag collection channel 1421 is formed in the collection box 142 by a plurality of baffles 144 to block the powder material and improve the collection rate of the powder material; 5. The collecting pipe 145 is perpendicular to the end of the pressure relief pipe 143 away from the collecting box 142, and a filter is provided at the exhaust port to improve the collection rate of the powder.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flour making device, characterized in that: include: A grinder, comprising a grinding chamber and a feed port connected to the grinding chamber, wherein the feed port is located at the top of the grinding chamber; A material supply component and a refrigeration component are both connected to the feed port, the material supply component is used to provide materials, and the refrigeration component is used to provide refrigeration medium; The collecting assembly comprises a connecting pipe, a collecting box and a pressure relief pipe. One end of the connecting pipe is communicated with the feed port, and the other end is connected to the collecting box. The pressure relief pipe is connected to the collecting box.

2. The flour making equipment according to claim 1, characterized in that: A collecting channel is formed in the collecting box, the collecting channel extends in a zigzag manner, both ends of the collecting channel are respectively connected to the connecting pipe and the pressure relief pipe, and the height of one end of the collecting channel connected to the connecting pipe is lower than that of one end of the collecting channel connected to the pressure relief pipe.

3. The flour making equipment according to claim 2, characterized in that: A plurality of baffles are arranged in the collection box and are spaced apart in the vertical direction to form the collection channel in the collection box. The height of each baffle gradually decreases from one end connected to the inner wall of the collection box to the other opposite end.

4. The flour making equipment according to claim 1, characterized in that: The collecting assembly also includes a collecting pipe, which includes an exhaust section, a connecting section and a collecting section connected in sequence, and the exhaust section is located above the collecting section, one end of the pressure relief pipe away from the collecting box is connected to the connecting section, and the angle between the axial direction of the end of the pressure relief pipe away from the collecting box and the axial direction of the exhaust section does not exceed 90°.

5. The flour milling equipment according to claim 4, characterized in that: The angle between the axial direction of the end of the pressure relief pipe away from the collecting box and the axial direction of the collecting section is not less than 90°.

6. The flour making equipment according to claim 4, characterized in that: An exhaust port is provided at one end of the exhaust section away from the connecting section; The powder making equipment further comprises a filter element, and the filter element is arranged at the exhaust port of the exhaust section.

7. The flour making equipment according to claim 1, characterized in that: It also includes a temperature measuring component, which is arranged on the grinder to detect the temperature in the grinding chamber.

8. The flour making equipment according to claim 7, characterized in that: It also includes a mounting part, which is arranged on the grinder, and the mounting part has a temperature measuring cavity and a temperature measuring hole and a mounting hole connected to the temperature measuring cavity, the temperature measuring hole is connected to the grinding cavity, and the aperture of the temperature measuring hole is smaller than the preset particle size of the powder; the temperature measuring part is sealingly connected to the mounting part, and the temperature measuring head of the temperature measuring part can extend into the temperature measuring cavity through the mounting hole.

9. The flour making equipment according to claim 7, characterized in that: The refrigeration component comprises an input pipe, which is connected to the feed port; the temperature measuring head of the temperature measuring component extends into the feed port, and the outlet of the input pipe faces the grinding chamber and is staggered with the temperature measuring head.

10. A method for preparing a powder, characterized in that: Includes steps: S110, inputting a preset amount of material into the grinding chamber through the feeding assembly; S120, inputting a refrigerant medium into the grinding chamber through a refrigeration component to make the temperature in the grinding chamber reach a preset temperature; S130, grinding the material in the grinding chamber by a grinder; During the grinding process, the refrigeration component maintains the input of the refrigeration medium, and part of the powder is discharged from the feed port into the collecting component so that the powder is collected by the collecting component.

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