CN218289578U

CN218289578U - Powder conveying device and batching equipment

Info

Publication number: CN218289578U
Application number: CN202222703073.XU
Authority: CN
Inventors: 刘玉
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-01-13
Anticipated expiration: 2032-10-14
Also published as: WO2024077724A1

Abstract

The utility model discloses a powder conveyor and dispensing equipment, wherein, powder conveyor includes: the device comprises a gas conveying component, a cache component and a feeding pipe, wherein the feeding pipe is provided with a first connecting port, a second connecting port and a third connecting port which are mutually communicated, the first connecting port of the feeding pipe is communicated with the output end of the gas conveying component, the second connecting port of the feeding pipe is communicated with the input end of the cache component, and the third connecting port of the feeding pipe is used for being communicated with a material storage component for storing powder; and the gas conveying assembly is used for generating negative pressure at the third connecting port of the feeding pipe when driving gas flow to be conveyed from the feeding pipe to the cache assembly so as to suck powder in the storage assembly to the cache assembly. The utility model discloses utilize the air current to form the negative pressure at the third connector of inlet pipe, under the negative pressure effect, the powder in the material stock subassembly is inhaled the inlet pipe to along with the air current dispersion flows in the buffer memory subassembly.

Description

Powder conveying device and batching equipment

Technical Field

The utility model relates to a lithium cell manufacturing field, in particular to powder conveyor and dispensing equipment.

Background

In the process of processing lithium batteries, a lot of powdery materials such as carbon powder need to be conveyed. The existing powder conveying mode mainly adopts a spiral feeding device to push powder to a preset direction.

In the operation process of the spiral feeding equipment, the spiral blades stir materials and push the materials to move, and the uncontrollable condition of the conveying capacity of the materials exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a powder conveyor aims at solving the problem of inconvenient control of powder conveying capacity in the current dispensing equipment.

In order to achieve the above object, the utility model provides a powder conveying device includes:

a gas delivery assembly;

a cache component; and

the feeding pipe is provided with a first connecting port, a second connecting port and a third connecting port which are mutually communicated, the first connecting port of the feeding pipe is communicated with the output end of the gas conveying component, the second connecting port of the feeding pipe is communicated with the input end of the cache component, and the third connecting port of the feeding pipe is used for being communicated with a material storage component for storing powder;

and the gas conveying assembly is used for generating negative pressure at the third connecting port of the feeding pipe when the driving gas flow is conveyed from the feeding pipe to the cache assembly so as to suck the powder in the stock assembly into the cache assembly.

When the airflow flows from the first connecting port to the second connecting port of the feeding pipe, negative pressure is formed at the third connecting port of the feeding pipe, powder in the material storage assembly is sucked into the third connecting port under the action of the negative pressure, and the powder enters the cache assembly along the feeding pipe. Because the powder is dispersion state under the air current effect and carries the buffer memory subassembly, can avoid the powder to be the caking form and get into the buffer memory subassembly, and then can realize carrying the powder dispersion, avoid because the caking powder causes the problem of the interior powder weight surge of buffer memory subassembly, and then can conveniently control the powder delivery capacity.

In some examples, the gas delivery assembly comprises:

the output end of the gas tank is communicated with the first connecting port of the feeding pipe; and

and the pressurization mechanism is communicated with the input end of the gas tank and is used for pressurizing and conveying gas to the gas tank.

The pressurization mechanism pressurizes and delivers the gas stream to a gas tank for storage and delivery of the gas stream.

Through the atmospheric pressure that adopts booster mechanism increase air current, can increase the atmospheric pressure of the second connector of inlet pipe, help increasing the negative pressure value of third connector to inhale the third connector with the powder in the material stock subassembly in, and then can increase the flow and the velocity of flow that get into the powder of inlet pipe, promote powder conveying speed.

In some examples, the cache component includes:

the input end of the buffer tank is communicated with the second connecting port of the feeding pipe; and

and the exhaust mechanism is communicated with the buffer tank and is used for exhausting the gas of the buffer tank.

The buffer tank is used for buffering the powder, and when needed, the powder in the buffer tank can be output to the batching equipment.

The exhaust mechanism is used for exhausting the air current in the buffer tank to the outside of the buffer tank so as to conveniently control the air pressure in the buffer tank, and the air current can enter the buffer tank through the feeding pipe.

In some examples, the exhaust mechanism comprises an exhaust valve and a first filtering element arranged on the exhaust valve, the exhaust valve is communicated with the buffer tank, and the first filtering element is used for filtering powder entering the exhaust valve.

The exhaust valve is used for communicating the buffer tank with the outside so as to conveniently control the air pressure of the buffer tank. The first filtering piece is used for filtering the airflow discharged to the outside of the buffer tank so as to prevent powder from leaking.

In some examples, the feed tube comprises:

a first pipe body having the first connection port and the second connection port formed therein; and

and the second pipe body is communicated with the first pipe body, and the third connecting port is formed in the second pipe body.

The first pipe body forms a main structure of the feeding pipe, the second pipe body is used for being connected with the material storage assembly, and the first pipe body is communicated with the second pipe body, so that when airflow flows in the first pipe body, negative pressure is formed in the second pipe body, powder in the material storage assembly connected with the second pipe body is sucked into the second pipe body, and the powder enters the caching assembly along the first pipe body.

In some examples, a first check valve is arranged on the first pipe body, and the input side of the first check valve is communicated with the output end of the gas delivery assembly; the second pipe body is communicated with the output side of the first one-way valve.

The first one-way valve can be used for controlling the air flow direction and preventing the air flow from flowing backwards.

In some examples, the first tubular body and/or the second tubular body have an inner diameter of no more than 10mm.

Through the internal diameter that makes first body and/or second body be less than or equal to 10mm, can make the air current keep high-speed mobile state in first body and/or second body to guarantee that third connection mouth can form the negative pressure state, make the powder can get into the second connector of first body.

In some examples, the second tubular body has an inner diameter less than or equal to an inner diameter of the first tubular body.

Through the internal diameter that makes the internal diameter of second body be less than or equal to first body to make third connector department can form better negative pressure state, the powder flow efficiency in the second body is higher.

In some examples, the powder delivery apparatus further comprises:

and the weight detection mechanism is used for detecting the weight of the powder output by the cache component.

The weight of the powder output by the cache assembly is detected through the weight detection mechanism, the scattered powder in the cache assembly can be quantitatively output, and the control precision of the powder output quantity is improved.

The utility model discloses on above-mentioned powder conveyor's basis, still provide a dispensing equipment, include:

a powder delivery apparatus as in any of the examples above; and

the material storage component is used for storing powder materials and is provided with a discharge hole, and the third connecting port of the feeding pipe is communicated with the discharge hole.

When the powder conveying device operates, a negative pressure is formed at the third connecting port of the feeding pipe, so that powder in the material storage assembly enters the third connecting port from the discharging port under the action of the negative pressure, then enters the caching assembly along the feeding pipe, the powder is dispersed and conveyed, and the weight of the powder is accurately controlled when the powder conveying device is convenient to prepare.

In some examples, the stock assembly comprises:

the material tank is used for storing powder, and is provided with the discharge hole; and

and the air inlet mechanism is communicated with the charging bucket so as to supply air flow into the charging bucket. The air inlet mechanism is used for communicating the charging bucket with the outside so as to balance the air pressure in the charging bucket. When negative pressure is formed at the third connecting port, airflow enters the material feeding tank from the air inlet mechanism, and the flowing airflow drives powder to enter the third connecting port and flow towards the second connecting port along the feeding pipe.

In some examples, the air inlet mechanism includes the admission valve and locates the second on the admission valve filters, the admission valve intercommunication the bucket, the second filters the gas that is used for filtering the entering admission valve.

The air inlet valve is used for controlling air flow to flow into the material tank, and the second filtering piece is used for filtering the air flow so as to prevent powder from being polluted.

In some examples, the feed outlet is located above the input of the cache assembly.

The powder flows to the input direction of buffer memory subassembly under the action of gravity, and when gas delivery assembly exported the air current, the powder can be inhaled the inlet pipe more easily, and then can improve powder conveying efficiency.

In some examples, the feed tube is provided with a second one-way valve; the input side of the second one-way valve is communicated with the discharge hole, and the output side of the second one-way valve is communicated with the input end of the cache component.

Through the output of second check valve control powder, simultaneously, the second check valve can play the effect of blockking to the air current, prevents that the air current from appearing palirrhea, and then control air current flow direction.

In some examples, the second one-way valve has a first opening degree and a second opening degree, the second opening degree being less than the first opening degree.

When the batching device does not open the gas conveying assembly, the second one-way valve can be opened to a first opening degree, so that powder can quickly enter the input end of the cache assembly under the action of gravity; when the weight of the powder in the cache assembly is about to reach the preset weight, the second one-way valve is opened to the second opening degree, and the gas conveying assembly is started, so that the powder is dispersed and enters the cache assembly in a small amount, and the control precision of the input amount of the powder can be improved.

In some examples, the output side of the second one-way valve communicates with the third connection port of the feed tube.

The powder output from the charging bucket is controlled by a second one-way valve. When the powder input volume in the buffer memory subassembly is close to presetting the input volume, close the second check valve, can remain a small amount of powder between third connector and buffer memory subassembly, the powder can move to the lower surface direction of pipeline under the action of gravity, under the effect of air current, can bring remaining a small amount of powder to the buffer memory subassembly, and then can realize the accurate control to the powder input volume.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of the powder conveying device of the present invention;

fig. 2 is the schematic diagram of the powder conveying principle of the powder conveying device of the utility model.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Gas delivery assembly	110	Gas tank
120	Supercharging mechanism	20	Feed pipe
				21	A first pipe body	211	First check valve
212	First connecting port	213	Second connecting port
				22	Second tube	221	Second check valve
222	Third connecting port	300	Stock component
				30	Charging bucket	31	Discharge port
32	Air inlet mechanism	321	Air inlet valve
				322	Second filter element	400	Cache assembly
40	Buffer tank	41	Exhaust mechanism
				411	Air outlet valve	412	First filter element

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear \8230;) are involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship between the components in a specific posture (as shown in the attached drawings), the motion situation, etc., and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The power battery is widely applied to the fields of energy storage power supply systems, electric vehicles and the like, wherein the energy storage power supply systems comprise power station energy storage systems such as water power, wind power, firepower, solar energy and the like; electric vehicles include electric automobiles, electric motorcycles, electric bicycles, and the like. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanded.

Lithium batteries are one of the common power batteries. The materials of the existing lithium battery mainly comprise a positive electrode material, a negative electrode material, a diaphragm and electrolyte. Among the cathode materials, the most commonly used materials are lithium cobaltate, lithium manganate, lithium iron phosphate and ternary materials (nickel cobalt manganese polymers). Among the negative electrode materials, natural graphite and artificial graphite are mainly used at present, and in addition, nitride, PAS, tin-based oxide, tin alloy, nano negative electrode material, and other intermetallic compounds are also included. The cathode material is one of four main constituent materials of the lithium battery, plays an important role in improving the capacity and the cycle performance of the battery, and is a key link in the lithium battery industry. In the construction of lithium batteries, the separator is one of the key internal layer components. The membrane material is mainly Polyolefin (Polyolefin) membrane mainly made of Polyethylene (PE) and polypropylene (PP). The electrolyte is generally prepared from high-purity organic solvent, electrolyte lithium salt, additive and other raw materials. The electrolyte plays a role in conducting ions between the positive electrode and the negative electrode of the lithium battery, and is a guarantee for the lithium battery to obtain the advantages of high voltage, high specific energy and the like.

The auxiliary powder required by the lithium battery comprises an electrode powder material, a conductive agent powder material, a filler powder material and the like, wherein the powder material for the electrode comprises lithium iron phosphate powder, ternary material powder, graphite negative electrode powder, silicon carbon negative electrode powder and the like; the powder material for the conductive agent comprises Acetylene Black (AB) powder, carbon Nano Tube (CNTs) powder and the like; the powder material used for the filler comprises an inert inorganic ceramic filler, an ion conductor inorganic ceramic filler and the like. The dosage of the powder material affects various performances of the lithium battery and even the use safety of the lithium battery.

In order to control the amount of the powder material, the existing powder conveying equipment is usually a screw feeder when conveying the powder. The screw feeder has the pivot and locates changeing epaxial helical blade, and helical blade is the spiral along the axial of pivot and extends, and when the motor drove the pivot and rotates, helical blade synchronous motion to mix the powder, and make the powder along helical blade's extending direction motion, so that the powder can remove to predetermineeing the position, and then realize the transport of powder. In the process of conveying powder by the screw feeder, the stock of the powder in the screw feeder is large, so that the screw blade can stir enough powder to move, and when the powder amount is small, the screw blade cannot stir the powder, and further cannot output the powder. Therefore, in actual use, the amount of the powder output from the screw feeder is generally large, and the conveying amount of the powder cannot be accurately controlled.

Further, in the process of storing the powder material, the powder material is deposited in the material storage assembly 300 under the action of gravity, and the powder material is easy to agglomerate. The existing screw feeder is used for stirring powder through blades in the process of conveying the powder, so that the powder can be in a dispersed state to a certain extent, and the powder is conveyed to a preset position along a preset track in a screw pushing mode. Because in the spiral pushing process, partial caking in the powder can move along with the spiral blade synchronously, when the powder is conveyed to the preset position, the total weight of the powder output to the preset position can be increased suddenly along with the addition of the caking under the action of the caking material, and further the control precision of the powder output quantity is reduced linearly.

In the production process of the lithium battery, the conveying capacity of the powder material influences the product performance of the product, and when the conveying capacity of the powder material cannot be controlled, the use safety of the produced lithium battery product can be greatly influenced. The utility model discloses an example powder conveyor is used for the powder raw materials of production, processing above-mentioned material in-process to carry, also can be used to carry above-mentioned powder in lithium cell processing, carries through making the powder be more dispersed state, and then realizes the accurate control to the powder delivery capacity.

The example of the utility model provides a powder conveyor, powder conveyor can be used to carry the required supplementary powder of lithium cell production. The powder conveying device is used for conveying powder in the material storage assembly 300 to a preset position. The powder conveying device can be used for conveying electrode powder materials, conductive agent powder materials and filler powder materials, and can also be used for conveying powdery raw materials for preparing the powder materials.

Referring to fig. 1, in some examples, the powder material conveying apparatus includes a gas conveying module 100, a buffer module 400, and a feeding pipe 20, the feeding pipe 20 has a first connection port 212, a second connection port 213, and a third connection port 222 that are mutually communicated, the first connection port 212 of the feeding pipe 20 is communicated with an output end of the gas conveying module 100, the second connection port 213 of the feeding pipe 20 is communicated with an input end of the buffer module 400, and the third connection port 222 of the feeding pipe 20 is used for being communicated with a material storage module 300 for storing powder material; when the gas delivery assembly 100 is used to drive the gas flow from the feeding tube 20 to the buffer assembly 400, a negative pressure is generated at the third connection port 222 of the feeding tube 20 to suck the powder in the storage assembly 300 into the buffer assembly 400.

The gas delivery assembly 100 is used for outputting a gas flow, the feeding pipe 20 is used for respectively communicating with the gas delivery assembly 100, the buffer storage assembly 400 and the storage assembly 300 for storing powder, and the powder in the storage assembly 300 enters the buffer storage assembly 400 through the feeding pipe 20 for buffering.

The gas delivery assembly 100 is configured to output a gas flow. Gas delivery assembly 100 has an output port in communication with feed tube 20 to enable gas flow along feed tube 20 in the direction of buffer assembly 400. In some examples, the gas output by the gas delivery assembly 100 is air, nitrogen, or other gas, or a combination of gases. In particular, the composition of the gas flow used may be determined according to the type of powder to be conveyed, for example, when used to convey powders that are not suitable for contact with oxygen, nitrogen or other particular gases that do not chemically react with the powder may be used; when used in conventional oxygen-contactable powders, the air may be delivered directly.

Referring to fig. 2, the feeding tube 20 has a first connection port 212, a second connection port 213 and a third connection port 222, wherein the first connection port 212 of the feeding tube 20 is connected to the output end of the gas delivery module 100, so that the gas flow in the gas delivery module 100 can enter the feeding tube 20 through the first connection port 212. The second connection port 213 of the feed tube 20 is connected to the buffer assembly 400, so that the gas flow outputted from the gas delivery module 100 can enter the buffer assembly 400 along the feed tube 20. The third connection port 222 of the feeding pipe 20 is communicated with the storage component 300, so that powder in the storage component 300 can enter the feeding pipe 20 through the third connection port 222.

The storage component 300 has a discharge port 31, and the discharge port 31 of the storage component 300 is communicated with the third connection port 222 of the feeding pipe 20, so that the powder stored in the storage component 300 can enter the feeding pipe 20 through the third connection port 222.

Referring to fig. 1 and 2, the first connection port 212, the second connection port 213 and the third connection port 222 of the feed pipe 20 are connected to each other, so as to form a first gas flow path from the gas delivery assembly 100 to the buffer assembly 400 and a second gas flow path from the storage assembly 300 to the buffer assembly 400. When the air flow flows from the first connection port 212 to the second connection port 213, a negative pressure state is formed at the third connection port 222, so that the powder in the storage module 300 is sucked into the feeding tube 20 under the negative pressure, and flows along with the air flow toward the third connection port 222, so that the powder is sucked into the buffer module 400.

In the air flow flowing process, the powder flows in a dispersed state under the action of the air flow, so that the powder can be prevented from caking in the conveying process. After the powder enters the feeding pipe 20 from the third connection port 222, in the process that the powder flows along the feeding pipe 20, the powder collides and rubs with the pipe wall of the feeding pipe 20 under the action of the air flow, and the powder collides and rubs with each other, so that the powder can be further scattered, the powder conveyed to the buffer storage assembly 400 can be in dispersed distribution, and the powder is prevented from caking. The powder is the dispersed state and inhales buffer memory subassembly 400 under the air current effect for the weight of the powder in buffer memory subassembly 400 increases gradually, can not appear because the powder of caking leads to the phenomenon that increases weight in the twinkling of an eye by a wide margin, and then conveniently carry out accurate control to the delivery capacity of powder. Because the air flow and the powder in the air flow act on the pipe wall of the feeding pipe 20 in the high-speed flowing process of the air flow, the amount of the powder attached to the feeding pipe 20 can be reduced, the feeding pipe 20 is prevented from being blocked, and the powder conveying efficiency is relatively higher.

The buffer memory assembly 400 is used for buffering powder, and when the powder is conveyed to a material using device, the scattered powder in the buffer memory assembly 400 can be directly output. The powder enters the buffer unit 400 through the second connection opening 213 of the feeding pipe 20, and along with the flow of the air flow, the powder enters the buffer unit 400 in a dispersed state, so that the weight of the powder in the buffer unit 400 is gradually increased. In some examples, the buffer assembly 400 is provided with an opening for outputting powder, and the powder stored in the buffer assembly 400 can be output from the opening. Since the powder material can enter the buffer assembly 400 in a dispersed state, the powder material agglomeration input to the buffer assembly 400 is reduced, and the output quantity of the powder material output from the buffer assembly 400 is easier to control.

In order to facilitate detection of the weight of the powder output by the powder conveying device, in some examples, the powder conveying device further includes a weight detection mechanism for detecting the weight of the powder output by the buffer storage assembly 400. In some examples, the weight detection mechanism is a weight sensor. The weight sensor is used for detecting the whole weight of the buffer assembly 400, and the weight of the powder output from the opening of the buffer assembly 400 is determined by detecting the change of the weight of the buffer assembly 400. In some examples, the weight detecting mechanism is an infrared sensor, the shape and volume of the buffer unit 100 are known, the infrared sensor detects the current highest position of the powder deposited in the buffer unit 400 before the opening of the buffer unit 400 is opened, the infrared sensor detects the current position of the powder when the opening of the buffer unit 400 is closed, and the mass of the powder output by the buffer unit 400 is converted by combining the internal volume of the buffer unit 400.

In some examples, the third connection port 222 is located above the input end of the buffer module 400, the third connection port 222 is connected to the discharge port 31 of the storage module 300, and the powder material of the storage module 300 may directly fall from the third connection port 222 toward the input end of the buffer module 400. When the gas conveying assembly 100 outputs the gas flow, the gas flow impacts the powder, so that the agglomerates in the powder are broken up, and the powder is further dispersedly input into the buffer assembly 400, so as to finely control the input amount of the powder.

In some examples, the powder delivery device includes a first one-way valve 211, and the first one-way valve 211 is configured to control the flow of the gas output by the gas delivery assembly 100. The first check valve 211 may be a check valve such as a throttle valve. The flow and/or rate of the gas stream output by the gas delivery assembly 100 is controlled by the first one-way valve 211, which in turn allows the gas pressure within the feed tube 20 to be controlled by varying the flow and/or rate of the gas stream. Referring to fig. 2, when a negative pressure state is formed at the third connection port 222 of the feeding pipe 20, the airflow in the material storage assembly 300 enters the feeding pipe 20 through the third connection port 222 under the action of the negative pressure to drive the powder to move synchronously, and as the flow rate of the airflow at the second connection port 213 of the feeding pipe 20 increases, the larger the negative pressure value formed at the third connection port 222 of the feeding pipe 20 is, the greater the flow rate and flow rate of the powder entering the feeding pipe 20 are also greatly increased. In some examples, the first one-way valve 211 can be directly connected to the output port of the gas delivery assembly 100, and the output port of the first one-way valve 211 is connected to the first port 212 of the feed tube 20.

In some examples, the powder delivery device further comprises an air inlet mechanism 32, and the air inlet mechanism 32 is in communication with the storage assembly 300 for allowing air flow into the storage assembly 300. The air intake mechanism 32 can be used to allow air to enter the stock assembly 300 and can also be used to allow other gases to enter the bucket 30. The type of gas entering the charging bucket 30 through the gas inlet mechanism 32 is adapted to the powder, for example, when the powder is a raw material which cannot be contacted with oxygen, nitrogen or other gases can be made to enter the storage component 300 through the gas inlet mechanism 32; when the powder is a material that can come into contact with oxygen, air can be allowed to enter the storage assembly 300 through the air inlet mechanism 32. The air inlet mechanism 32 is communicated with the outside of the material storage component 300, and when negative pressure is formed at the third connecting port 222, air flow in the air inlet mechanism 32 can enter the material storage component 300 and drive powder in the material storage component 300 to flow to the third connecting port 222.

In some examples, the powder conveying device further comprises a second one-way valve 221, the second one-way valve 221 may be directly disposed on the discharge port 31 of the storage assembly 300, the third connection port 222 of the feeding pipe 20 is communicated with the output port of the second one-way valve 221 to control the flow of the powder to the feeding pipe 20 through the second one-way valve 221, and the second one-way valve 221 may also be used to prevent the air flow from the feeding pipe 20 to the inside of the storage assembly 300, so as to avoid the backflow of the powder. In particular, the second check valve 221 may be a throttle valve or other check valve, and the flow rate and/or flow velocity of the powder material is controlled by the throttle valve.

In some examples, the powder conveying device further comprises an exhaust mechanism 41, and the exhaust mechanism 41 is connected with the buffer assembly 400 and used for exhausting the gas in the buffer assembly 400. As the air flow enters the buffer assembly 400 through the feed tube 20, the air flow in the buffer assembly 400 is output along the venting mechanism 41 to reduce the air pressure in the buffer assembly 400. Further, in some examples, the powder conveying device further includes an air inlet mechanism 32 as described in the above examples, and the output end of the air outlet mechanism 41 may be communicated with the input end of the air inlet mechanism 32. In some examples, the output of the exhaust mechanism 41 may be in communication with the input of the gas delivery assembly 100 to recycle the gas flow.

In some examples, gas delivery assembly 100 includes a gas tank 110 and a pressurization mechanism 120 coupled to gas tank 110, an output of gas tank 110 being in communication with first connection port 212 of feed line 20, pressurization mechanism 120 being in communication with an input of gas tank 110 for pressurizing and delivering a gas stream into gas tank 110.

The air flow is pressurized by the pressurization mechanism 120 to realize high-speed output of the air flow, and a negative pressure state is formed at the third connection port 222 of the feeding pipe 20 by the high-speed flowing air flow. In some examples, the negative pressure value of the third connection port 222 of the feeding pipe 20 is adjusted by adjusting the flow rate of the gas flow output by the gas tank 110, so that the powder conveying efficiency can be adaptively changed. Further, in some examples, the boost mechanism 120 is a boost pump, by which the gas flow is boosted.

In some examples, the buffer assembly 400 includes a buffer tank 40 and a gas exhausting mechanism 41 connected to the buffer tank 40, wherein an input end of the buffer tank 40 is communicated with the second connection port 213 of the feeding pipe 20, and the gas exhausting mechanism 41 is used for outputting gas in the buffer tank 40 to control the gas pressure in the buffer tank 40. The gas delivery assembly 100, feed tube 20, buffer tank 40, and venting mechanism 41 form a first gas flow path.

Further, in some examples, the exhaust mechanism 41 includes an exhaust valve 411 and a first filter 412 disposed on the exhaust valve 411, wherein the exhaust valve 411 is communicated with the buffer tank 40 for exhausting air to the outside of the buffer tank 40; the first filter 412 is disposed at an arbitrary position on the gas flow path of the discharge valve 411, for filtering the gas flow outputted from the discharge valve 411. In some examples, the first filter element 412 may be a screen, a filter, or a combination of various structures having a filtering function.

In some examples, the feed tube 20 includes a first tube 21 and a second tube 22, the first tube 21 forms the first connection port 212 and the second connection port 213 of the feed tube 20, the input end of the second tube 22 forms the third connection port 222 of the feed tube 20, and the output end of the second tube 22 is connected to the first tube 21. By arranging the first tube 21 and the second tube 22 to cooperate, an airflow channel for airflow and powder flowing can be conveniently formed. Specifically, in some examples, the first connection port 212 and the second connection port 213 may be openings at both ends of the first tube 21. In some examples, the first connection port 212 and/or the second connection port 213 are openings formed at any position on the first tube 21, or one of the first connection port 212 and the second connection port 213 is an opening formed at any position on the first tube 21, and the other is an opening at one end of the first tube 21. In some examples, the third connection port 222 is an opening formed at any position on the second tube 21, or the third connection port 222 is an opening formed at an end of the second tube 21 far from the first tube 21.

Further, in some examples, the powder conveying device is provided with the first one-way valve 211 described in the above examples, wherein the first one-way valve 211 is provided in the first pipe 21. In some examples, the powder conveying device is provided with the second check valve 221 described in the above examples, and the second check valve 221 is provided on the second tube 22 to communicate the discharge port 31 of the stock component 300 with the third connection port 222 of the feed tube 20. In some examples, the powder conveying apparatus is provided with the first check valve 211 and the second check valve 221 described in the above examples, the first check valve 211 is provided to the first pipe body 21, the second check valve 221 is provided to the second pipe body 22, and the second pipe body 22 is connected to an output side of the first check valve 211 for controlling the flow rate and/or flow velocity of the air flow.

Further, in order to control the powder conveying speed conveniently, in some examples, the diameter of the first pipe 21 is proportional to the density of the conveyed powder, wherein the density of the powder is related to the particle size of the powder particles, the shape of the powder particles, the surface roughness and the specific surface area thereof, and the corresponding diameter of the first pipe 21 can be determined according to the specific type of the powder. In some examples, the diameter of the tube 22 is proportional to the density of the powder being transported.

In some examples, the feed tube 20 includes a first tube 21, and the first tube 21 defines a first connection port 212 and a second connection port 213. Specifically, the first connection port 212 and the second connection port 213 may be openings of both ends of the first tube 21. In some examples, the first connection port 212 and/or the second connection port 213 may be an opening provided at any position on the first tube 21, or one of the first connection port 212 and the second connection port 213 may be an opening provided at any position on the first tube 21, and the other may be an opening at one end of the first tube 21. Further, in some examples, the third connection port 222 is an opening opened between the first connection port 212 and the second connection port 213, and the third connection port 222 directly communicates with the discharge port 31 of the material storage assembly 300.

In some examples, the powder conveying device is provided with a first one-way valve 211 as described in the above examples, wherein the first one-way valve 211 is provided at the first tube 21 for controlling the flow and/or velocity of the gas flow. Further, in some examples, the discharge hole 31 of the stock component 300 is provided with the second check valve 221 described in the above examples, and an outlet end of the second check valve 221 is communicated with an output side of the first check valve 211.

In some examples, the first tube 21 has a tube diameter of no more than 10mm. The pipe diameter of the first pipe 21 can be 10mm, 9mm, 8mm, 7mm, 6mm or 5mm, and can also be other sizes. When the pipe diameter of the first pipe 21 is greater than 10mm, the flow velocity of the air flow in the first pipe 21 will decrease, which causes the pressure at the third connection port 222 to decrease, and further affects the powder input efficiency.

In some examples, the inner diameter of the second tube 22 is no more than 10mm. The pipe diameter of the second pipe 22 can be 10mm, 9mm, 8mm, 7mm, 6mm or 5mm, and can also be other sizes. When the diameter of the second tube 22 is greater than 10mm, the flow velocity of the air flow in the second tube 22 will decrease, which will cause the pressure at the third connection port 222 to decrease, and further affect the powder input efficiency.

Further, in some examples, the tube diameter of the second tube 22 is equal to the tube diameter of the first tube 21.

In some examples, the diameter of the second tube 22 is smaller than that of the first tube 21, so that a negative pressure can be formed at the third connection port 222 of the second tube 22, which facilitates the powder to be sucked into the first tube 21, and thus the powder input efficiency can be improved. The difference between the pipe diameters of the first pipe 21 and the second pipe 22 may be 1mm, 2mm or 3mm.

In some examples, second tube 22 is positioned above first tube 21 so that powder flows from top to bottom toward the input end of buffer assembly 400. The powder itself moves downward under gravity and is simultaneously drawn into the buffer assembly 400 under negative pressure. In the process of sucking the powder by negative pressure, the lumps in the powder can be broken up, so that the powder can enter the buffer memory assembly 400 in a dispersed state.

The utility model discloses on the basis of above-mentioned powder conveyor's example, still provide a dispensing equipment's example. The batching plant comprises a powder conveying device and a storage assembly 300 as described in any of the above examples, wherein the storage assembly 300 is used for storing powder, the storage assembly 300 has a discharge port 31, and the third connection port 222 of the feeding pipe 20 is communicated with the discharge port 31.

Referring to fig. 1 and fig. 2, when the gas in the gas transportation module 100 enters the feeding pipe 20 through the first connection port 212, during the process that the gas flow flows along the feeding pipe 20 to the second connection port 213, a negative pressure state is formed at the third connection port 222 of the feeding pipe 20, so that the powder in the storage module 300 enters the third connection port 222 from the discharge port 31 and flows along the feeding pipe 20 to the buffer module 400, thereby outputting the powder. Because the negative pressure through the air current effect drives the powder and flows for the powder of carrying buffer memory subassembly 400 is broken up, is the disperse state and falls into buffer memory subassembly 400, avoids because the problem that the lumpish powder leads to the powder weight surge in the buffer memory jar 40, can make the powder be the disperse state simultaneously and carry, conveniently carries out accurate control to the weight of powder.

The batching equipment can be used for batching of lithium battery auxiliary powder and can also be used in other scenes needing to convey the powder material.

It is worth noting, because the utility model discloses dispensing equipment is based on above-mentioned powder conveyor, consequently, the utility model discloses dispensing equipment's example includes all technical scheme of above-mentioned powder conveyor's whole examples, and the technological effect that reaches is also identical, no longer gives unnecessary details here.

In some examples, the material storage assembly 300 includes a material tank 30 and an air inlet mechanism 32 connected to the material tank 30, wherein the air inlet mechanism 32 is used for communicating with the outside of the material tank 30 to maintain a preset air pressure state in the material tank 30. The charging bucket 30 is used for storing powder, the discharging port 31 is arranged on the charging bucket 30, and the third connecting port 222 of the feeding pipe 20 is communicated with the discharging port 31 of the charging bucket 30.

Further, in some examples, the air intake mechanism 32 includes an air intake valve 321 and a second filter 322 disposed on the air intake valve 321, wherein the air intake valve 321 is in communication with the bucket 30 for balancing the air pressure of the bucket 30, and the second filter 322 is used for filtering impurities in the air flow entering the air intake valve 321. The second filter 322 may be disposed at any position on the air flow path of the intake valve 321.

In some examples, the discharge port 31 of the stock component 300 is located above the input end of the buffer component 400. When the gas delivery assembly 100 is not turned on, the powder may fall directly into the buffer assembly 400 in a natural state. When the gas conveying assembly 100 is started, the powder moves downwards under the action of gravity, and meanwhile, under the action of the gas flow, the powder is scattered by the gas flow, so that the powder can be conveyed into the cache assembly 400 in a dispersed state, and further, the input amount of the powder can be controlled when needed.

Further, in some examples, the feed tube is provided with a second one-way valve 221; the input side of the second check valve 221 is communicated with the discharge port 31, and the output side of the second check valve 221 is communicated with the input end of the buffer assembly 400. The second check valve 221 is used for controlling the output of the powder, and meanwhile, the flow direction of the second check valve 221 is from the discharge port to the input end of the buffer module 400. The second check valve 221 may be used to control the flow direction of the air flow, thereby preventing the reverse flow of the air flow.

Since the discharge port of the storage assembly 300 is located above the input end of the buffer assembly 400, the amount of the falling powder can be controlled by controlling the opening degree of the second check valve 221. The opening degree is a position where the valve element (or the valve plate) moves when the valve element (or the valve plate) changes the flow passage throttling area when the second check valve 221 is adjusted, and the opening degree of the valve is generally expressed in percentage. The larger the opening degree of the second check valve 221 is, the larger the throttle area per unit time is, and the larger the flow rate of the powder per unit time is. Further, in some examples, the feeding tube 20 includes the first tube 21 and the second tube 22 described in any of the previous examples, and the second check valve 221 is disposed on the second tube 22.

In some examples, the discharge port 31 of the material storage assembly 300 is located above the input end of the buffer assembly 400, and the second check valve 221 has a first opening degree and a second opening degree, and the second opening degree is smaller than the first opening degree. When the powder distance inside the buffer assembly 400 is larger than the preset target powder quantity difference, the gas conveying assembly 100 is not opened, and the second check valve 221 is set to be at the first opening degree, so that the powder can fall into the buffer assembly 400 downwards under the action of gravity. When the amount of powder in the buffer memory assembly 400 is close to the preset target powder amount, the opening of the second check valve 221 is adjusted to be a second opening, at this time, the powder amount output from the second check valve 221 in unit time is reduced, the gas conveying assembly 100 is started, a negative pressure is formed at a third connecting port of the feeding pipe, so that the powder is sucked into the buffer memory assembly 400, further the caking in the powder is scattered, the powder is conveyed to the buffer memory assembly 400 in a dispersion state, further, the slow small-amount powder conveying is realized, so that the conveying amount of the powder is conveniently and accurately controlled, and further, the conveying amount of the powder can be more controllable.

In some examples, an input side of the second check valve 221 communicates with the discharge port, and an output side of the second check valve 221 communicates with the third connection port 222 of the feed pipe.

Since the discharge port is located above the input end of the buffer assembly 400, the powder discharged from the discharge port flows downward under the action of gravity. When the powder input amount in the buffer storage assembly 400 is close to the preset input amount, the second one-way valve 221 is closed, a small amount of powder can be remained between the third connecting port and the buffer storage assembly 400, the powder can move towards the lower surface direction of the pipeline under the action of gravity, and under the action of air flow, the residual small amount of powder can be conveyed to the buffer storage assembly 400, so that the accurate control of the powder input amount can be conveniently realized.

In some examples, the feeding pipe comprises a first pipe body 21 and a second pipe body 22 described in the above examples, the first pipe body 21 forms a first connection port 212 and a second connection port 213, the second pipe body 22 forms the above third connection port 222, an input side of a second check valve 221 communicates with the discharge port, and an output side of the second check valve 221 is connected with the second pipe body 22 and communicates with the third connection port 222. When the powder is discharged from the second check valve 221, a certain amount of powder remains in the second tube 22, and the powder flows toward the first tube 21 under the action of gravity. When the gas conveying assembly 100 conveys gas, the gas can convey a small amount of residual powder to the buffer assembly 400, so that the conveying of the small amount of powder is realized, the control of the input amount of the powder is facilitated, and the conveying precision is improved.

The utility model discloses a powder conveyor that the example is disclosed is used for carrying the powder in the material stock subassembly 300 in the buffer memory subassembly 400, through making the powder get into buffer memory subassembly 400 along inlet pipe 20, makes the powder broken up, and the powder is the dispersed state and carries to buffer memory subassembly 400 in to prevent the problem of caking from appearing in the powder transportation process, and then avoid because the powder of caking leads to carrying the problem of the sudden increase of powder weight in the buffer memory subassembly 400, help accurate control powder delivery capacity. When the gas flow in the gas delivery module 100 enters the feed tube 20 and flows along the feed tube 20 toward the buffer module 400, a negative pressure is generated at the third connection port 222 of the feed tube 20 due to the gas flow, so that the powder in the storage module 300 is sucked into the third connection port 222 and flows along the feed tube 20 toward the buffer module 400. Due to the air flow, the powder can be input into the buffer assembly 400 in a dispersed state. The powder in the air flow collides with the inner wall of the feeding pipe 20, and the powder in the air flow collides with each other, so that a small amount of agglomerates in the powder are scattered, the powder conveyed to the buffer storage assembly 400 is in a dispersed state, and the powder is conveyed dispersedly.

Because the powder can be the dispersed state and get into cache subassembly 400, when the powder output with in the cache subassembly 400, the output quantity of control powder more easily, and then when being arranged in the dosing apparatus with powder conveyor, can conveniently carry out accurate control to the powder output quantity, avoid the uncontrollable problem of powder precision that the caking powder that exists leads to among the current spiral feed equipment. When the powder in the buffer memory assembly 400 is output, the weight of the powder output by the buffer memory assembly 400 can be obtained by detecting the real-time weight of the buffer memory assembly 400, so that the powder output by the powder conveying device is obtained, and the accurate control of the powder output quantity is realized.

The utility model discloses a dosing equipment that the example is disclosed includes the powder conveyor of any above-mentioned example to be used for carrying the powder in the material stock subassembly 300 to buffer memory subassembly 400. In the dispensing device, a second check valve 221 is disposed on the second body 22 of the feeding pipe 20 to prevent the reverse flow of the air flow. The bucket 30 of the stock assembly 300 is located above the buffer tank 40 of the buffer assembly 400. The discharge port 31 of the charging bucket 30 is located above the inlet end of the buffer tank 40, so that the powder can flow downwards under the action of gravity when the second one-way valve 221 is opened. When the powder amount in the buffer tank 40 is different from the preset target powder amount, more powder needs to be input at this time, and the opening degree of the second one-way valve 221 is increased, so that the powder can quickly enter the buffer tank 40 through the second one-way valve 221; when the powder amount in the buffer tank 40 is close to the preset target powder amount, the opening degree of the second check valve 221 is reduced, and the gas conveying assembly 100 is started, so that the gas flow drives the powder, the powder is dispersed and conveyed in a small amount, the input amount of the powder can be controlled more conveniently, the powder input amount of the buffer tank 40 is controlled, and the powder input precision in the buffer tank 40 is improved.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the inventive concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A powder conveying device is characterized by comprising:

a gas delivery assembly;

a cache component; and

and the gas conveying assembly is used for generating negative pressure at the third connecting port of the feeding pipe when driving gas flow to be conveyed from the feeding pipe to the cache assembly so as to suck powder in the storage assembly to the cache assembly.

2. The powder delivery apparatus of claim 1, wherein the gas delivery assembly comprises:

3. The powder delivery apparatus of claim 1, wherein the buffer assembly comprises:

4. The powder conveying device according to claim 3, wherein the exhaust mechanism comprises an exhaust valve and a first filter element arranged on the exhaust valve, the exhaust valve is communicated with the buffer tank, and the first filter element is used for filtering the powder entering the exhaust valve.

5. The powder delivery device of any one of claims 1 to 4, wherein the feed tube comprises:

a first pipe body formed with the first connection port and the second connection port; and

6. The powder conveying apparatus as claimed in claim 5,

a first check valve is arranged on the first pipe body, and the input side of the first check valve is communicated with the output end of the gas conveying assembly; the second pipe body is communicated with the output side of the first one-way valve.

7. The powder delivery apparatus of claim 5, wherein the first tube and/or the second tube has an inner diameter of no more than 10mm.

8. The powder delivery apparatus of claim 5, wherein the second tube has an inner diameter less than or equal to the inner diameter of the first tube.

9. The powder delivery apparatus of any one of claims 1 to 4, further comprising:

10. A dispensing apparatus, comprising:

the powder conveying apparatus of any one of claims 1 to 9; and

11. The dispensing apparatus of claim 10, wherein the stock assembly comprises:

and the air inlet mechanism is communicated with the charging bucket so as to supply air flow into the charging bucket.

12. The dispensing apparatus according to claim 11, wherein said air intake mechanism includes an air intake valve in communication with said bucket and a second filter element disposed on said air intake valve for filtering air entering said air intake valve.

13. The dispensing apparatus of claim 10 wherein said spout is positioned above an input end of said buffer assembly.

14. The dispensing apparatus of claim 13, wherein said feed tube is provided with a second one-way valve; the input side of the second one-way valve is communicated with the discharge hole, and the output side of the second one-way valve is communicated with the input end of the cache component.

15. The dispensing apparatus of claim 14, wherein the second one-way valve has a first opening and a second opening, the second opening being less than the first opening.

16. The dispensing apparatus of claim 14 wherein the output side of said second one-way valve communicates with the third connecting port of said feed tube.