Feeding device

Abstract

The invention relates to the field of feeding devices, in particular to a feeding device which comprises a first stock bin, a second stock bin, a third stock bin, a fourth stock bin and a fourth stock bin. The second stock bin comprises a second cavity, a second discharging port communicated with the second cavity, a plug body inserting port communicated with the second cavity and a piston inserted into the plug body inserting port, and the piston is used for extruding materials in the second cavity so that the materials can flow to the second discharging port; the driving mechanism is in driving connection with the piston; the reversing valve comprises a first connector, a second connector and a third connector, the first connector is communicated with the first discharge port, and the second connector is communicated with the second discharge port; the discharging pipe group is communicated with the third interface; wherein the reversing valve is provided with a first valve position and a second valve position, the first stock bin can be communicated with the second stock bin when the reversing valve is located at the first valve position, and the second stock bin can be communicated with the discharging pipe set when the reversing valve is located at the second valve position. And the material conveying mode is improved, feeding can be more accurately controlled, and the operation difficulty can be lowered.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging equipment, and particularly to a feeding device. Background Art

[0002] In the field of packaging and processing, for the packaging and processing of bagged materials, the automated packaging is generally achieved through a packaging machine and a feeding device.

[0003] Specifically, the packaging machine provides packaging bags, and the feeding device is used to feed materials into the packaging bags. During the feeding process, it is necessary to accurately control the feeding amount to ensure that the weight of the materials carried by each packaging bag meets the packaging requirements. Some existing feeding devices usually use a material bin with a discharge valve at the bottom to feed materials into the packaging bags. Such feeding devices mainly rely on the gravity of the materials to achieve feeding, and control the feeding amount by the opening degree of the discharge valve. The problem is that the accuracy of feeding control of this kind of feeding device is low, and the difficulty of packaging feeding control is large.

[0004] Therefore, in view of the problems existing in some existing feeding devices, in order to be able to control feeding more accurately and reduce the operation difficulty, it is necessary to make further improvements. Summary of the Invention

[0005] Based on this, it is necessary to provide a feeding device aiming at the existing problems, which aims to improve the conveying mode of materials, is beneficial to more accurately control feeding, and is beneficial to reducing the operation difficulty.

[0006] The present application provides a feeding device, which includes: A first material bin, including a first chamber and a first discharge port communicating with the first chamber; A second material bin, including a second chamber, a second discharge port communicating with the second chamber, a plug socket communicating with the second chamber, and a piston inserted into the plug socket, the piston being used to extrude the materials in the second chamber to flow towards the second discharge port; A driving mechanism, drivingly connected to the piston; A directional control valve, including a first interface, a second interface and a third interface, the first interface communicating with the first discharge port, and the second interface communicating with the second discharge port; A discharge pipe group, communicating with the third interface; Wherein, the directional control valve has a first valve position and a second valve position. When the directional control valve is in the first valve position, the first material bin and the second material bin can be communicated; when the directional control valve is in the second valve position, the second material bin and the discharge pipe group can be communicated.

[0007] In some embodiments, the directional control valve includes: A housing, wherein the first interface, the second interface and the third interface are provided on the housing; A reversing valve core, rotatably arranged in the housing, the reversing valve core is provided with a through hole and a communication hole, the through hole penetrates through the reversing valve core, one end of the communication hole communicates with the through hole, and the other end penetrates through the reversing valve core; Wherein, when the reversing valve core stops at the first valve position, the first interface and the second interface are communicated through the through hole, and when the reversing valve core stops at the second valve position, the second interface is communicated with the third interface through the communication hole and the through hole.

[0008] In some embodiments, the reversing valve further includes: A reversing valve core driving source, whose output end is drivingly connected with the reversing valve core, and is used for driving the reversing valve core to rotate reciprocally between the first valve position and the second valve position.

[0009] In some embodiments, the reversing valve core driving source includes a rotary cylinder.

[0010] In some embodiments, the driving mechanism includes: A screw-nut assembly, including a floating nut and a screw, the floating nut is in transmission connection with the screw, and the floating nut is connected with the piston; A screw driving source, drivingly connected with the screw, and is used for driving the screw to rotate.

[0011] In some embodiments, the screw driving source includes: A rotating motor; A driving wheel, fixedly connected with the rotor of the rotating motor; A driven wheel, fixedly connected with the screw; A transmission belt, tensioned and installed on the driving wheel and the driven wheel.

[0012] In some embodiments, the rotating motor includes a servo motor; and / or, the rotating motor is arranged on one side in the radial direction of the screw.

[0013] In some embodiments, the discharge pipe group includes: A connecting pipe, one end of which is communicated with the third interface; A discharge valve, including a discharge valve body and a discharge valve core, the discharge valve body is provided with a discharge port, a discharge channel and a fourth interface, and the discharge port and the fourth interface are communicated through the discharge channel; Wherein, the other end of the connecting pipe is communicated with the fourth interface, and at least part of the discharge valve core is movably arranged in the discharge channel to control the communication between the connecting pipe and the discharge channel.

[0014] In some embodiments, the discharge pipe group further includes a blowing air source, the discharge valve core is provided with a hollow air passage, one end of the hollow air passage communicates with the discharge passage, and the other end of the hollow air passage is connected to the blowing air source.

[0015] In some embodiments, the discharge passage is a straight passage extending in a straight line, the discharge valve core is in the shape of a long rod, and the discharge pipe group further includes: A linear drive source, fixed to the discharge valve body, the output end of the linear drive source is connected to the discharge valve core, and the linear drive source is used to drive the discharge valve core to move back and forth between an open valve position and a closed valve position; Wherein, when the discharge valve core is in the open valve position, the communication pipe communicates with the discharge port through the fourth interface and the discharge passage; when the discharge valve core is in the closed valve position, the discharge valve core blocks the fourth interface.

[0016] Advantages of the present invention: The feeding device of the present invention can realize selective communication through the first bin, the second bin, and the discharge pipe group via a reversing valve. Among them, the first bin can store materials. The reversing valve can connect the first bin and the second bin in the first valve position, and the reversing valve can connect the second bin and the discharge pipe group in the second valve position. And a piston for extruding the materials in the second chamber of the second bin is inserted into the second chamber of the second bin.

[0017] With the above structure, when performing the feeding operation, the present invention can first store the materials in the first bin; then, adjust the reversing valve to the first valve position to allow the materials to flow from the first bin into the second chamber of the second bin; then, adjust the reversing valve to the second valve position to connect the second bin and the discharge pipe group; at this time, the driving mechanism can be used to drive the piston to extrude the materials in the second chamber, so that the materials in the second chamber flow into the discharge pipe group through the second discharge port, realizing more accurate control of material transportation.

[0018] The present invention adds a second bin with a piston for extruding the materials in the second chamber. The piston is driven by a driving mechanism to extrude the materials, rather than relying solely on the weight of the materials themselves for discharging and transportation. Therefore, the extrusion degree can be controlled by accurately controlling the displacement of the piston, which is beneficial to more accurate control of feeding and reducing the operation difficulty. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiment drawings can be obtained based on these drawings.

[0020] Figure 1 A three-dimensional schematic diagram of a feeding device provided by an embodiment of the present invention; Figure 2 A side view of a feeding device provided by an embodiment of the present invention; Figure 3 A partial position sectional schematic diagram of a feeding device provided by an embodiment of the present invention; Figure 4 A three-dimensional schematic diagram of a feeding device provided by an embodiment of the present invention with a partial frame hidden; Figure 5 A three-dimensional schematic diagram of a feeding device provided by an embodiment of the present invention with partial outer shells of the first bin and the reversing valve hidden; Figure 6 A partial sectional schematic diagram of the position of the reversing valve when the reversing valve connects the first bin (hidden) and the second bin provided by an embodiment of the present invention; Figure 7 A combined sectional schematic diagram of a discharging valve and a linear drive source provided by an embodiment of the present invention; Figure 8 A combined three-dimensional schematic diagram of a discharging valve and a linear drive source provided by an embodiment of the present invention; Reference numerals: 1. First bin; 11. First chamber; 12. First discharge port; 2. Second bin; 21. Second chamber; 22. Second discharge port; 23. Plug socket; 24. Piston; 3. Driving mechanism; 31. Screw-nut assembly; 311. Floating nut; 312. Screw rod; 313. Outer sleeve; 3131. Anti-rotation sliding hole; 314. Inner sleeve; 315. Anti-rotation column; 316. Rolling bearing; 32. Screw rod drive source; 321. Rotating motor; 322. Driving wheel; 323. Driven wheel; 324. Transmission belt; 4. Reversing valve; 41. Outer shell; 411. First interface; 412. Second interface; 413. Third interface; 42. Reversing valve core; 421. Through hole; 422. Communication hole; 43. Reversing valve core drive source; 5. Discharge pipe group; 51. Connecting pipe; 52. Discharge valve; 521. Discharge valve body; 5211. Discharge port; 5212. Discharge channel; 5213. Fourth interface; 522. Discharge valve core; 5221. Central air duct; 52211. Thin air duct section; 52212. Enlarged-diameter air duct section; 523. Air hole plate; 53. Linear drive source; 6. Frame. Specific embodiments

[0021] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0024] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present invention, unless otherwise clearly specified and defined, a feature being "on" or "under" a second feature may be in direct contact with the second feature or in indirect contact with the second feature through an intermediate medium. Moreover, a feature being "above", "over" and "on top of" a second feature may be directly above or obliquely above the second feature, or merely indicate that the feature has a higher level height than the second feature. A feature being "under", "beneath" and "underneath" a second feature may be directly below or obliquely below the second feature, or merely indicate that the feature has a lower level height than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0027] Some existing feeding devices usually use a material bin with a discharge valve at the bottom to feed materials into a packaging bag. Such feeding devices mainly rely on the gravity of the materials to achieve feeding, and control the feeding amount by the opening degree of the discharge valve. The problem is that the control accuracy of this kind of feeding device for feeding is low, and the control difficulty of packaging feeding is large.

[0028] Therefore, in view of the problems existing in some existing feeding devices, in order to be able to control feeding more accurately and reduce the operation difficulty, it is necessary to make further improvements.

[0029] In view of the above problems, referring to Figure 1-4, an embodiment of the present application provides a feeding device, aiming to improve the material conveying method, which is beneficial to more accurate feeding control and reduces the operation difficulty. The feeding device includes a first bin 1, a second bin 2, a driving mechanism 3, a reversing valve 4, and a discharging pipe group 5. The first bin 1 includes a first chamber 11 and a first discharge port 12 communicating with the first chamber 11; the second bin 2 includes a second chamber 21, a second discharge port 22 communicating with the second chamber 21, a plug socket 23 communicating with the second chamber 21, and a piston 24 inserted into the plug socket 23. The piston 24 is used to extrude the material in the second chamber 21 to flow towards the second discharge port 22; the driving mechanism 3 is drivingly connected to the piston 24; the reversing valve 4 includes a first interface 411, a second interface 412, and a third interface 413. The first interface 411 communicates with the first discharge port 12, and the second interface 412 communicates with the second discharge port 22; the discharging pipe group 5 communicates with the third interface 413; wherein, the reversing valve 4 has a first valve position and a second valve position. When the reversing valve 4 is in the first valve position, it can connect the first bin 1 and the second bin 2, and when the reversing valve 4 is in the second valve position, it can connect the second bin 2 and the discharging pipe group 5.

[0030] As described above, the feeding device in the embodiment of the present application can realize the selective connection of the first bin 1, the second bin 2, and the discharging pipe group 5 through the reversing valve 4. Among them, the first bin 1 can realize the storage of materials. When the reversing valve 4 is in the first valve position, it can connect the first bin 1 and the second bin 2, and when the reversing valve 4 is in the second valve position, it can connect the second bin 2 and the discharging pipe group 5. And a piston 24 for extruding the material in the second chamber 21 is inserted into the second chamber 21 of the second bin 2.

[0031] With the above structure, when performing the feeding operation, the material can be first stored in the first bin 1; then, the reversing valve 4 is adjusted to the first valve position to allow the material in the first bin 1 to flow into the second chamber 21 of the second bin 2; then, the reversing valve 4 can be adjusted to the second valve position to connect the second bin 2 and the discharging pipe group 5; at this time, the driving mechanism 3 can be used to drive the piston 24 to extrude the material in the second chamber 21, so that the material in the second chamber 21 flows into the discharging pipe group 5 through the second discharge port 22, realizing more accurate control of material conveying. It adds a second bin 2 with a piston 24 to extrude the material in the second chamber 21, and the piston 24 is driven by the driving mechanism 3 to extrude the material, rather than relying solely on the weight of the material itself for discharging and conveying in a single layer. Therefore, the extrusion degree can be controlled by precisely controlling the displacement of the piston 24, which is beneficial to more accurate feeding control and reduces the operation difficulty.

[0032] Reference Figure 3-4 , in some embodiments, the second chamber 21 of the second bin 2 is a columnar chamber that is hermetically adapted to the shape of the piston 24, such as a cylindrical chamber, which has a simple structure, is easy to process, and has a low cost.

[0033] In some embodiments, referring to Figure 1-3 , the feeding device further includes a frame 6, and the first bin 1, the second bin 2, the driving mechanism 3, the reversing valve 4, and the discharging pipe group 5 are integrated on the frame 6 to form the main body of the feeding device, with a high degree of overall integration and convenient transportation.

[0034] In some embodiments, referring to Figure 3 , Figure 5 and Figure 6 , the reversing valve 4 includes a housing 41 and a reversing valve core 42. The first interface 411, the second interface 412, and the third interface 413 are opened on the housing 41; the reversing valve core 42 is rotatably arranged in the housing 41, and the reversing valve core 42 is provided with a through hole 421 and a communication hole 422. The through hole 421 penetrates the reversing valve core 42, and one end of the communication hole 422 communicates with the through hole 421, and the other end of the communication hole 422 penetrates the reversing valve core 42; wherein, when the reversing valve core 42 stops at the first valve position, the first interface 411 and the second interface 412 are communicated through the through hole 421, and when the reversing valve core 42 stops at the second valve position, the second interface 412 is communicated with the third interface 413 through the communication hole 422 and the through hole 421, so as to realize the control of filling the second bin 2 or extruding the material in the second bin 2 to the discharging pipe group 5 by controlling the rotation and stop position of the reversing valve core 42.

[0035] In some embodiments, referring to Figure 3 and Figure 6 , the reversing valve 4 further includes a reversing valve core driving source 43. The output end of the reversing valve core driving source 43 is drivingly connected to the reversing valve core 42. The reversing valve core driving source 43 is used to drive the reversing valve core 42 to reciprocally rotate between the first valve position and the second valve position, realizing electric control, with simple and convenient operation and high automation degree. Specifically, in some embodiments, the reversing valve core driving source 43 includes a rotary cylinder. The rotary cylinder can drive the reversing valve core 42 to rotate to realize the valve position control of the reversing valve 4.

[0036] In some embodiments, referring to Figure 3-4, the driving mechanism 3 includes a lead screw nut assembly 31 and a lead screw driving source 32. The lead screw nut assembly 31 includes a floating nut 311 and a lead screw 312. The floating nut 311 is in transmission connection with the lead screw 312, and the floating nut 311 is connected to the piston 24; the lead screw driving source 32 is in driving connection with the lead screw 312, and the lead screw driving source 32 is used to drive the lead screw 312 to rotate. The driving mechanism 3 adopts a lead screw nut assembly 31. The lead screw nut assembly 31 has high displacement control accuracy for the floating nut 311. By precisely controlling the number of turns of the lead screw 312, the movement amount of the floating nut 311 along the axis of the lead screw can be precisely controlled, and further the displacement amount of the piston 24 can be precisely controlled, that is, the extrusion degree of the material in the second bin 2 can be precisely controlled.

[0037] Further, referring to Figure 3-4 , in some embodiments, the lead screw nut assembly 31 further includes an outer sleeve 313 and an inner sleeve 314; the outer sleeve 313 can be fixed on the frame 6; the lead screw 312 passes through the outer sleeve 313, and the lead screw 312 is rotatably fitted with the outer sleeve 313; specifically, the rotatable fit is achieved through a bearing; the inner sleeve 314 passes through the outer sleeve 313, and the lead screw 312 passes through the inner sleeve 314. At the same time, the floating nut 311 is fixedly connected to the inner sleeve 314, and the piston 24 is also fixedly connected to the inner sleeve 314. At the same time, the lead screw nut assembly 31 further includes an anti-rotation column 315, and the anti-rotation column 315 is fixed on the floating nut 311; the outer sleeve 313 is provided with an anti-rotation sliding hole 3131 extending along the axial direction of the lead screw 312, and the anti-rotation column 315 passes through the anti-rotation sliding hole 3131. Furthermore, through the cooperation of the anti-rotation column 315 and the anti-rotation sliding hole 3131, the floating nut 311 can only float up and down relative to the lead screw 312 along the axis of the lead screw and cannot rotate relative to the lead screw 312.

[0038] Further, referring to Figure 3-4 , the anti-rotation column 315 passes through the anti-rotation sliding hole 3131, and the anti-rotation column 315 is also sleeved with a rolling bearing 316. Its smooth cooperation with the anti-rotation sliding hole 3131 is realized through the rolling bearing 316, and high-precision anti-rotation limitation is realized; that is, on the one hand, the frictional resistance can be reduced, and on the other hand, the rotation of the floating nut 311 relative to the lead screw 312 can be strictly limited to ensure the transmission accuracy of the lead screw nut assembly 31.

[0039] Referring to Figure 3-4, in some embodiments, the lead screw drive source 32 includes a rotating motor 321, a driving pulley 322, a driven pulley 323, and a transmission belt 324; the driving pulley 322 is fixedly connected to the rotor of the rotating motor 321; the driven pulley 323 is fixedly connected to the lead screw 312; the transmission belt 324 is tensioned and installed on the driving pulley 322 and the driven pulley 323. The advantage of this structure is that the transmission ratio can be flexibly adjusted by selecting driving pulleys 322 and driven pulleys 323 with different diameters; in addition, the position layout of the rotating motor 321 is more flexible and has stronger selectivity.

[0040] In some embodiments, the rotating motor 321 includes a servo motor, and using a servo motor can achieve more precise rotation control.

[0041] In some embodiments, referring to Figure 3-4 , the rotating motor 321 is arranged on one side in the radial direction of the lead screw 312, so that the space on one side in the radial direction of the lead screw 312 can be fully utilized, the layout is compact, and it is beneficial to reduce the occupied space of the feeding device in the axial direction of the lead screw 312.

[0042] In some embodiments, referring to Figure 3 , Figure 7 and Figure 8 , the discharge pipe group 5 includes a connecting pipe 51 and a discharge valve 52. One end of the connecting pipe 51 is connected to the third interface 413; the discharge valve 52 includes a discharge valve body 521 and a discharge valve core 522. The discharge valve body 521 is provided with a discharge port 5211, a discharge channel 5212, and a fourth interface 5213. The discharge port 5211 and the fourth interface 5213 are connected through the discharge channel 5212; wherein, the other end of the connecting pipe 51 is connected to the fourth interface 5213, and at least part of the discharge valve core 522 is movably arranged in the discharge channel 5212 to control the connection between the connecting pipe 51 and the discharge channel 5212.

[0043] As described above, by using the second bin 2 with the piston 24 to extrude the material, the first-level accurate control of the output material quantity is achieved. Further, referring to Figure 3 and Figure 6 , the discharge valve 52 controls the connection between the connecting pipe 51 and the discharge channel 5212, thereby achieving the second-level control of the material conveying accuracy. Through the two-level control, the weight of the finally discharged material can be controlled more conveniently and accurately.

[0044] In some embodiments, referring to Figure 3 , Figure 7 and Figure 8, the discharge pipe group 5 further includes a blowing air source. The discharge valve core 522 is provided with a central air passage 5221. One end of the central air passage 5221 communicates with the discharge passage 5212, and the other end of the central air passage 5221 is connected to the blowing air source. The blowing air source can adopt a gas compression pump. The discharge valve core 522 directly integrates the central air passage 5221, with a compact structure and ingenious design. By blowing air into the discharge passage 5212, the materials adhering to the inside of the discharge passage 5212 can be cleaned and discharged through the discharge port 5211, which is beneficial to accurately control the discharge amount, and can also prevent the discharge passage 5212 from being blocked, improving the stability of the feeding device.

[0045] In some embodiments, referring to Figure 3 , Figure 7 and Figure 8 , the discharge passage 5212 is a straight passage extending along a straight line. The discharge valve core 522 is in a long rod shape. The discharge pipe group 5 further includes a linear drive source 53. The linear drive source 53 is fixed to the discharge valve body 521. The output end of the linear drive source 53 is connected to the discharge valve core 522. The linear drive source 53 is used to drive the discharge valve core 522 to move back and forth between the open valve position and the closed valve position; wherein, when the discharge valve core 522 is in the open valve position, the communication pipe 51 communicates with the discharge port 5211 through the fourth interface 5213 and the discharge passage 5212; when the discharge valve core 522 is in the closed valve position, the discharge valve core 522 blocks the fourth interface 5213. The linear drive source 53 can adopt a linear displacement driver such as a linear cylinder. More specifically, there is a nut on the output rod of the linear drive source 53 that is fixedly connected to the discharge valve core 522, and an air hole (not marked in the figure) communicating with the discharge passage 5212 is opened on the nut. Then, the gas compression pump can be connected to this air hole through an air pipe.

[0046] Furthermore, in some embodiments, referring to Figure 3 and Figure 7 , the central air passage 5221 in the discharge valve core 522 extends along its own axis direction. One end of the discharge valve core 522 faces the discharge port 5211, and the other end of the discharge valve core 522 faces away from the discharge port 5211 and is fixedly connected to the output end of the linear drive source 53.

[0047] In some embodiments, referring to Figure 3 and Figure 7 , the discharge valve 52 further includes an air hole plate 523. A large number of air holes are opened on the air hole plate 523; the air hole plate 523 is fixed to one end of the discharge valve core 522 facing the discharge port 5211 and covers the air outlet of the central air passage 5221. On the one hand, the air hole plate 523 can reduce the entry of materials into the central air passage 5221. On the other hand, the air hole plate 523 cuts the air flow, which is beneficial to generating a high-speed air flow for blowing.

[0048] Referring to Figure 3 and Figure 7, in some embodiments, the central air duct 5221 includes a thin air duct segment 52211 and a diameter-expanded air duct segment 52212 that are sequentially connected along the air outlet direction. The diameter-expanded air duct segment 52212 is connected to the air outlet of the central air duct 5221. The aperture of the thin air duct segment 52211 is smaller than that of the diameter-expanded air duct segment 52212. The thin air duct segment 52211 is conducive to forming high-pressure gas. Since the aperture in the diameter-expanded air duct segment 52212 is larger, it is less likely to be blocked by materials.

[0049] Finally, it should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0050] The above embodiments only represent one implementation mode of the present invention, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A feeding device, characterized in that, Comprising: A first silo (1), including a first chamber (11) and a first discharge port (12) communicating with the first chamber (11); A second silo (2), including a second chamber (21), a second discharge port (22) communicating with the second chamber (21), a plug socket (23) communicating with the second chamber (21), and a piston (24) inserted into the plug socket (23), the piston (24) being used to extrude the material in the second chamber (21) to flow towards the second discharge port (22); A driving mechanism (3), drivingly connected to the piston (24); A reversing valve (4), including a first interface (411), a second interface (412), and a third interface (413), the first interface (411) communicating with the first discharge port (12), the second interface (412) communicating with the second discharge port (22); A discharge pipe group (5), communicating with the third interface (413); Wherein, the reversing valve (4) has a first valve position and a second valve position. When the reversing valve (4) is in the first valve position, the first silo (1) and the second silo (2) can be communicated. When the reversing valve (4) is in the second valve position, the second silo (2) and the discharge pipe group (5) can be communicated.

2. The feeding device according to claim 1, wherein The reversing valve (4) includes: A housing (41), the first interface (411), the second interface (412), and the third interface (413) are opened on the housing (41); A reversing valve core (42), rotatably arranged in the housing (41), the reversing valve core (42) is provided with a through hole (421) and a communication hole (422), the through hole (421) penetrates through the reversing valve core (42), one end of the communication hole (422) communicates with the through hole (421), and the other end penetrates through the reversing valve core (42); Wherein, when the reversing valve core (42) docks to the first valve position, the first interface (411) and the second interface (412) are communicated through the through hole (421). When the reversing valve core (42) docks to the second valve position, the second interface (412) is communicated with the third interface (413) through the communication hole (422) and the through hole (421).

3. The feeding device according to claim 2, characterized in that, The reversing valve (4) further includes: A reversing valve core driving source (43), its output end is drivingly connected to the reversing valve core (42), and is used to drive the reversing valve core (42) to rotate reciprocally between the first valve position and the second valve position.

4. The feeding device according to claim 3, characterized in that, The reversing valve core driving source (43) includes a rotary cylinder.

5. The feeding device according to claim 1, characterized in that, The driving mechanism (3) includes: A screw-nut assembly (31), including a floating nut (311) and a screw rod (312), the floating nut (311) is in transmission connection with the screw rod (312), and the floating nut (311) is connected to the piston (24); A screw rod driving source (32), drivingly connected to the screw rod (312), and is used to drive the screw rod (312) to rotate.

6. The feeding device according to claim 5, wherein, The screw rod driving source (32) includes: A rotating motor (321); The driving wheel (322) is fixedly connected to the rotor of the rotating motor (321); The driven wheel (323) is fixedly connected to the lead screw (312); The transmission belt (324) is tension-mounted on the driving wheel (322) and the driven wheel (323).

7. The feeding device according to claim 6, characterized in that, The rotating motor (321) includes a servo motor; and / or, the rotating motor (321) is arranged on one side in the radial direction of the lead screw (312).

8. The feeding device according to claim 1, characterized in that The discharge pipe group (5) includes: The connecting pipe (51), one end of which is connected to the third interface (413); The discharge valve (52) includes a discharge valve body (521) and a discharge valve core (522). The discharge valve body (521) is provided with a discharge port (5211), a discharge channel (5212) and a fourth interface (5213). The discharge port (5211) and the fourth interface (5213) are connected through the discharge channel (5212); Wherein, the other end of the connecting pipe (51) is connected to the fourth interface (5213), and at least part of the discharge valve core (522) is movably arranged in the discharge channel (5212) for controlling the connection between the connecting pipe (51) and the discharge channel (5212).

9. The feeding device according to claim 8, characterized in that, The discharge pipe group (5) further includes a blowing air source. The discharge valve core (522) is provided with a hollow air channel (5221). One end of the hollow air channel (5221) is connected to the discharge channel (5212), and the other end of the hollow air channel (5221) is connected to the blowing air source.

10. The feeding device according to claim 8, characterized in that, The discharge channel (5212) is a straight channel extending along a straight line. The discharge valve core (522) is in a long rod shape. The discharge pipe group (5) further includes: The linear driving source (53) is fixed to the discharge valve body (521). The output end of the linear driving source (53) is connected to the discharge valve core (522). The linear driving source (53) is used to drive the discharge valve core (522) to move back and forth between the open valve position and the closed valve position; Wherein, when the discharge valve core (522) is in the open valve position, the connecting pipe (51) is connected to the discharge port (5211) through the fourth interface (5213) and the discharge channel (5212); when the discharge valve core (522) is in the closed valve position, the discharge valve core (522) blocks the fourth interface (5213).

Images