阅读说明：本技术 一种粉料储存计量装置及粉料计量方法 (Powder storage and metering device and powder metering method ) 是由 陈琦 曾晓辉 张宏伟 杨兵忠 刘锦辉 管吉波 刘石坚 左剑勇 宋剑伟 刘建芬 龙 于 2021-07-05 设计创作，主要内容包括：本发明提出了一种粉料储存计量装置及粉料计量方法,涉及混凝土设备技术领域,本申请提出的粉料储存计量装置包括：用于存储粉料的料仓、计量组件、输料软管、粉料输送机构、距离传感器；其中,计量组件包括一计量筒体、一推杆构件、螺母构件、动力源、出料挡板、开关机构、电控阀门。本申请的技术方案能够对落料的粉料体积进行控制,进而控制落料的粉料质量,并具有如下技术效果：第一、无需在称重箱体外围布置称重传感器,计量筒体形状可设置成筒状,空间上容易布置,对其他部件影响较小,有利于整个设备的空间利用。第二、通过计量筒体的计量通道能够快速多次进行体积测量,本身所需的体积可以做小。(The invention provides a powder storage and metering device and a powder metering method, and relates to the technical field of concrete equipment, wherein the powder storage and metering device comprises: the device comprises a storage bin for storing powder, a metering component, a conveying hose, a powder conveying mechanism and a distance sensor; the metering assembly comprises a metering cylinder, a push rod component, a nut component, a power source, a discharge baffle, a switch mechanism and an electric control valve. The technical scheme of this application can control the powder volume of blanking, and then the powder quality of control blanking to have following technological effect: first, need not to arrange weighing sensor in weighing box body periphery, the metering cylinder shape can set to the tube-shape, arranges easily in the space, and is less to other parts influence, is favorable to the space utilization of whole equipment. Secondly, can carry out volume measurement many times fast through the metering passage of measurement barrel, the volume that itself needs can be done for a short time.)

1. A powder storage metering device, comprising: the device comprises a storage bin (100) for storing powder, a metering component (200), a delivery hose (300), a powder conveying mechanism (400) and a distance sensor (500); the metering assembly (200) comprises a metering cylinder body (210), a push rod component (220), a nut component (230), a power source (240), a discharge baffle (250), a switch mechanism (260) and an electric control valve (270);

the top of the metering cylinder body (210) is provided with a top opening (211), and the bottom of the metering cylinder body is provided with a discharge hole (212); a metering channel (213) is formed between the top opening (211) and the discharge hole (212);

the pusher member (220) comprises: the metering device comprises a sliding plug part (221) in sealing sliding fit with the metering channel (213), a screw rod part (222) which is positioned at the upper part of the sliding plug part (221) and the upper end of which extends out of the top opening (211), and a material conveying channel (223) which vertically penetrates through the screw rod part (222) and the sliding plug part (221);

the nut member (230) is rotatably arranged at the position of the top opening (211) of the metering cylinder body (210), is sleeved on the periphery of the screw rod part (222) of the push rod member (220) and is in threaded fit with the screw rod part (222) to form spiral transmission;

the power source (240) is used for driving the nut member (230) to rotate, so that the nut member (230) pushes the push rod member (220) to move up and down through screw transmission;

the discharge baffle (250) is arranged at the position of a discharge hole (212) of the metering cylinder (210) and is used for closing or opening the discharge hole (212); the discharge baffle (250) is hinged with the metering cylinder (210), and a torsion spring (251) is arranged between the discharge baffle and the metering cylinder; the torsion spring (251) is used for driving the discharging baffle (250) to elastically close the discharging hole (212);

the switch mechanism (260) is provided with a telescopic component (261) capable of telescopic action; the telescopic component (261) can extend out to prevent the discharge baffle (250) from rotating to open when the discharge baffle (250) is in a position for closing the discharge hole (212);

the electric control valve (270) is arranged at the upper end of the screw part (222) of the push rod component (220); one end of the delivery hose (300) is connected with the powder conveying mechanism (400), and the other end of the delivery hose is connected with the electric control valve (270); the electric control valve (270) can be adjusted to enable the delivery hose (300) and the delivery channel (223) to be communicated or disconnected; the powder conveying mechanism (400) is used for conveying powder in the storage bin (100) into the conveying hose (300);

the distance sensor (500) is arranged at the bottom of the sliding plug part (221) and is used for measuring the distance between the powder in the metering channel (213) and the bottom of the sliding plug part (221).

2. The powder storage metering device of claim 1, wherein the metering channel (213) of the metering cylinder (210) is formed with a ring of raised ring portions (214) around the screw portion (222) at a location near the top opening (211).

3. The powder storage metering device of claim 1, wherein a bearing is mounted between the nut member (230) and the metering cylinder (210).

4. The powder storage metering device of claim 1, wherein the cross-section of the metering channel (213) is oval or square.

5. The powder storage metering device of claim 1, wherein the metering channel (213) is circular in cross-section and has a chute (215) formed therein in line with the direction of movement of the pusher member (220); the sliding plug part (221) is provided with a convex block part (224) matched with the sliding groove (215).

6. The powder storage metering device of claim 1, wherein the power source (240) is an electric motor; a driving gear (241) is arranged on an output shaft of the motor;

a gear ring (231) capable of meshing with the driving gear (241) is machined on the exterior of the nut member (230).

7. The powder storage and metering device of claim 1, wherein the switch mechanism (260) is a pneumatic actuator or an electric actuator.

8. The powder storage and metering device of claim 1, wherein the sliding plug portion (221) is provided with a plurality of air holes.

9. The powder storage metering device of claim 1, further comprising a pressure sensor (600); the pressure sensor (600) is arranged at the bottom of the sliding plug part (221) and is used for measuring the pressure between the powder in the metering channel (213) and the bottom of the sliding plug part (221).

10. A powder measuring method applied to the powder storage and measuring device according to any one of claims 1 to 9, comprising the steps of:

controlling the powder conveying mechanism (400) to be in a state of stopping working;

controlling a power source (240) to drive the nut member (230) to rotate so as to move the push rod member (220) to the initial position; at this time, the height of the bottom of the sliding plug part (221) is H1;

a telescopic component (261) of the control switch mechanism (260) extends out to prevent the discharge baffle (250) from rotating and opening;

controlling the electric control valve (270) to be opened;

controlling a powder conveying mechanism (400) to be started to input powder into a metering channel (213), measuring a distance L between the powder in the metering channel (213) and the bottom of a sliding plug part (221) through a distance sensor (500), determining a powder height H2 in the metering channel (213) according to the height H1 of the bottom of the sliding plug part (221) and the distance L, determining the volume of the powder in the metering channel (213) according to the powder height H2, and calculating the mass of the powder according to the volume and the density of the powder;

controlling the powder conveying mechanism (400) to be closed, controlling the electric control valve (270) to be closed, controlling the telescopic part (261) of the switch mechanism (260) to be retracted, controlling the power source (240) to drive the nut member (230) to rotate so that the push rod member (220) moves downwards to enable the powder to push the discharging baffle plate (250) to be pushed away for blanking from the discharging hole (212), and closing the discharging hole (212) again by the discharging baffle plate (250) under the action of the torsion spring (251) until blanking is completed.

Technical Field

The application relates to the technical field of concrete equipment, in particular to a powder storage and metering device and a powder metering method.

Background

Self-compacting concrete refers to concrete which can flow and be compact under the action of self gravity, can completely fill a template even if compact steel bars exist, and simultaneously obtains good homogeneity without additional vibration. The self-compacting concrete is widely applied to tunnel construction. Chinese patent 201810105836.6 discloses a self-compacting concrete mixer is carried to finished product, and this finished product is carried self-compacting concrete mixer formula self-compacting concrete mixing equipment as an organic whole, with the storage, measurement, transport and the agitated vessel integration of the multiple material that self-compacting concrete needs together. In such integrated self-compacting concrete mixing equipment, raw materials need to be added into the mixer in a certain proportion, and the weighing device is used for carrying out mass measurement on various materials. Among this kind of integrated form self-compaction concrete mixing equipment, the powder in the workbin is carried and is weighed in weighing box, and workbin and weighing box often need occupy a large amount of spaces, are unfavorable for the miniaturization, and the tunnel space is limited, and the overall dimension requirement to construction equipment is higher, therefore ordinary self-compaction concrete mixing equipment overall dimension is difficult to reach the tunnel construction requirement.

Disclosure of Invention

The present application provides a powder storage and metering device and a powder metering method, aiming at the above disadvantages of the prior art.

This powder stores metering device includes: the device comprises a storage bin for storing powder, a metering component, a conveying hose, a powder conveying mechanism and a distance sensor; the metering assembly comprises a metering cylinder, a push rod member, a nut member, a power source, a discharge baffle, a switch mechanism and an electric control valve;

the top of the metering cylinder body is provided with an opening at the top, and the bottom of the metering cylinder body is provided with a discharge hole; a metering channel is formed between the top opening and the discharge hole;

the pusher member includes: the metering channel comprises a sliding plug part in sealing sliding fit with the metering channel, a screw rod part which is positioned at the upper part of the sliding plug part and the upper end of which extends out of the top opening, and a material conveying channel which vertically penetrates through the screw rod part and the sliding plug part;

the nut component is rotatably arranged at the position of the top opening of the metering cylinder body, is sleeved on the periphery of the screw rod part of the push rod component and is in threaded fit with the screw rod part to form spiral transmission;

the power source is used for driving the nut member to rotate, so that the nut member pushes the push rod member to move up and down through screw transmission;

the discharge baffle is arranged at the discharge hole of the metering cylinder and is used for closing or opening the discharge hole; the discharge baffle is hinged with the metering cylinder, and a torsion spring is arranged between the discharge baffle and the metering cylinder; the torsion spring is used for driving the discharge baffle to elastically seal the discharge hole;

the switch mechanism is provided with a telescopic component which can do telescopic action; the telescopic component can extend out to prevent the discharge baffle from rotating and opening when the discharge baffle is in a position for closing the discharge hole;

the electric control valve is arranged at the upper end of the screw rod part of the push rod component; one end of the material conveying hose is connected with the powder conveying mechanism, and the other end of the material conveying hose is connected with the electric control valve; the electric control valve can be adjusted to enable the material conveying hose and the material conveying channel to be communicated or disconnected; the powder conveying mechanism is used for conveying powder in the storage bin into the conveying hose;

the distance sensor is arranged at the bottom of the sliding plug part and is used for measuring the distance between powder in the metering channel and the bottom of the sliding plug part.

In some refinements, the metering channel of the metering cylinder is formed with a ring of raised ring portions around the screw portion at a location near the top opening.

In some refinements, a bearing is mounted between the nut member and the metering cylinder.

In some refinements, the cross-section of the metering channel is oval or square.

In some refinements, the metering channel has a circular cross-section with a chute formed thereon in line with the direction of movement of the pusher member; and the sliding plug part is provided with a convex block part matched with the sliding groove.

In some refinements, the power source is an electric motor; a driving gear is arranged on an output shaft of the motor;

and a gear ring capable of being meshed with the driving gear is processed outside the nut component.

In some refinements, the switching mechanism is a pneumatic actuator or an electric actuator.

In some refinements, the sliding plug portion is provided with a plurality of air holes.

In some improvements, the powder storage and metering device further comprises a pressure sensor; the pressure sensor is arranged at the bottom of the sliding plug part and is used for measuring the pressure between the powder in the metering channel and the bottom of the sliding plug part.

On the other hand, the application also provides a powder metering method, which is applied to the powder storage and metering device provided in the above part and comprises the following steps:

controlling the powder conveying mechanism to be in a state of stopping working;

controlling a power source to drive the nut member to rotate so as to move the push rod member to the initial position; at the moment, the height of the bottom of the sliding plug part is H;

the telescopic part of the control switch mechanism extends out to prevent the discharge baffle from rotating and opening;

controlling the electric control valve to open;

controlling a powder conveying mechanism to be started to input powder into the metering channel, measuring the distance L between the powder in the metering channel and the bottom of the sliding plug part through a distance sensor, determining the height H of the powder in the metering channel according to the height H and the distance L of the bottom of the sliding plug part, determining the volume of the powder in the metering channel according to the height H of the powder, and calculating the mass of the powder according to the volume and the density of the powder;

and controlling the powder conveying mechanism to be closed, controlling the electric control valve to be closed, controlling the telescopic part of the switch mechanism to be retracted, controlling the power source to drive the nut member to rotate so as to enable the push rod member to move downwards to enable the powder to push the discharging baffle plate to be pushed away to discharge materials from the discharging port, and enabling the discharging baffle plate to close the discharging port again under the action of the torsion spring until the discharging is completed.

The application provides a metering device is stored to powder includes: the device comprises a storage bin for storing powder, a metering component, a conveying hose, a powder conveying mechanism and a distance sensor; the metering assembly comprises a metering cylinder, a push rod component, a nut component, a power source, a discharge baffle, a switch mechanism and an electric control valve. The technical scheme of this application can control the powder volume of blanking, and then the powder quality of control blanking to have following technological effect: first, need not to arrange weighing sensor in weighing box body periphery, the metering cylinder shape can set to the tube-shape, arranges easily in the space, and is less to other parts influence, is favorable to the space utilization of whole equipment. Secondly, can carry out volume measurement many times fast through the metering passage of measurement barrel, the volume that itself needs can be done for a short time.

Drawings

FIG. 1 is a schematic structural diagram of a powder storage and metering device in an embodiment of the present application.

FIG. 2 is another schematic structural diagram of a powder storage and metering device in the embodiment of the present application.

Fig. 3 is a sectional view taken along line a in fig. 2.

FIG. 4 is a flow chart of a method for metering a pulverized material in an embodiment of the present application.

Detailed Description

The following are specific embodiments of the present application and are further described with reference to the drawings, but the present application is not limited to these embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

In addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 1 to 3, an embodiment of the present application provides a powder storage and metering device, which includes: the device comprises a storage bin 100 for storing powder, a metering component 200, a conveying hose 300, a powder conveying mechanism 400 and a distance sensor 500; the metering assembly 200 includes a metering cylinder 210, a push rod member 220, a nut member 230, a power source 240, a discharge baffle 250, a switch mechanism 260, and an electrically controlled valve 270.

In the embodiment of the application, the powder storage and metering device is applied to the integrated self-compacting concrete mixing equipment, and is particularly used for storing and metering powder, such as coal ash and cement. In particular, the self-compacting concrete is concrete which can flow and compact under the action of self gravity, can completely fill a formwork even if compact reinforcing steel bars exist, and simultaneously obtains good homogeneity without additional vibration. The self-compacting concrete is prepared from raw materials including an additive, a cementing material and coarse and fine aggregates, and specifically comprises the following materials: stone, sand, cement, coal ash, liquid additive and solid additive. Wherein, the stones are coarse aggregates; sand is fine aggregate; the cement and the coal ash are powder materials. The integrated self-compacting concrete mixing plant integrates the storage, metering, conveying and mixing equipment of various materials required by the self-compacting concrete. In such integrated self-compacting concrete mixing equipment, raw materials need to be added into the mixer in a certain proportion, and the weighing device is used for carrying out mass measurement on various materials. The integrated self-compacting concrete mixing device can be used for manufacturing self-compacting concrete on site.

The integrated self-compacting concrete mixing plant has a plant housing forming an external structure. The integrated self-compacting concrete stirring equipment is characterized in that a stirrer, a conveyor belt, a material box and a weighing device are arranged in an equipment shell. These conventional components are within the scope of the prior art and will not be described in detail herein. Among this kind of integrated form self-compaction concrete mixing equipment, the powder in the workbin is carried and is weighed in weighing box, and workbin and weighing box often need occupy a large amount of spaces, are unfavorable for the miniaturization, and the tunnel space is limited, and the overall dimension requirement to construction equipment is higher, therefore ordinary self-compaction concrete mixing equipment overall dimension is difficult to reach the tunnel construction requirement.

The top of the metering cylinder 210 is provided with a top opening 211, and the bottom is provided with a discharge hole 212; a metering channel 213 is formed between the top opening 211 and the discharge hole 212. The metering channel 213 can be used to contain powder.

Referring to fig. 2, the push rod member 220 includes: a sliding plug part 221 in sealing sliding fit with the metering channel 213, a screw part 222 located at the upper part of the sliding plug part 221 and with the upper end extending out of the top opening 211, and a feed delivery channel 223 vertically penetrating through the screw part 222 and the sliding plug part 221. The sliding plug portion 221 is in sealed sliding engagement with the metering channel 213 and is capable of moving up and down along the metering channel 213. The feed passage 223 vertically penetrates the screw portion 222 and the sliding plug portion 221, and powder can be fed into the metering passage 213 from top to bottom through the feed passage 223.

Referring to fig. 2, a nut member 230 is rotatably mounted at the position of the top opening 211 of the metering cylinder 210, and is sleeved on the periphery of the screw portion 222 of the push rod member 220 and is in threaded fit with the screw portion 222 to form a screw drive; the power source 240 is used for driving the nut member 230 to rotate, so that the nut member 230 pushes the push rod member 220 to move up and down through screw transmission. A screw transmission can be formed between the nut member 230 and the screw part 222, and the screw transmission can convert the rotation of the nut member 230 into the vertical linear motion of the push rod member 220. Therefore, the nut member 230 pushes the push rod member 220 to move up and down by rotating under the driving of the power source 240. Further, a bearing is installed between the nut member 230 and the metering cylinder 210.

In some embodiments, power source 240 is an electric motor; a driving gear 241 is arranged on an output shaft of the motor; a gear ring 231 capable of meshing with the driving gear 241 is formed outside the nut member 230. Here, the motor may be a servo motor.

It should be noted that, the distance that the nut member 230 drives the push rod member 220 to move per rotation is a certain value T, so the controller can precisely control the number of rotations of the nut member 230 through the power source 240, thereby precisely controlling the moving distance of the push rod member 220, and in combination with the initial height of the push rod member 220 in the metering channel 213, the controller can precisely control the position of the push rod member 220 in the metering channel 213.

In some embodiments, referring to fig. 2, the metering channel 213 of the metering cylinder 210 is formed with a ring of raised ring portions 214 around the screw portion 222 at a location proximate the top opening 211. The collar 214 can limit the sliding plug 221 to prevent the sliding plug 221 from moving upward out of the metering channel 213.

In some embodiments, the sliding plug portion 221 is provided with a plurality of air holes. When the sliding plug part 221 moves in the metering cylinder 210, the air holes facilitate the air in the metering cylinder 210 to rapidly enter and exit, so that the air pressures on the upper side and the lower side of the sliding plug part 221 are rapidly balanced. Further, the air holes are not shown in the drawings. The pores are small holes for ventilation, and it is difficult for the powder to smoothly pass through. In some embodiments, the metering cylinder may be provided with a large number of fine air holes, which only allow air to pass through, but make smooth passage of the powder difficult due to the small diameter of the air holes.

The pusher member 220 is only capable of moving up and down relative to the metering cylinder 210. In some embodiments, the cross-section of the metering channel 213 is elliptical or square. The sliding plug portion 221 is a sealed sliding fit with the cross-sectional shape of the metering channel 213, while the oval or square cross-section prevents rotation of the sliding plug portion 221 relative to the metering cylinder 210.

In some embodiments, the metering channel 213 is circular in cross-section, having a slot 215 formed therein that is aligned with the direction of movement of the pusher member 220; the sliding plug 221 is provided with a projection 224 adapted to the sliding groove 215. Here, the protrusion 224 of the sliding plug 221 is engaged with the sliding slot 215 of the metering channel 213, so as to prevent the sliding plug 221 from rotating relative to the metering cylinder 210.

Referring to fig. 2, a discharge baffle 250 is disposed at the discharge port 212 of the metering cylinder 210, and is used for closing or opening the discharge port 212; the discharge baffle 250 is hinged with the metering cylinder 210, and a torsion spring 251 is arranged between the discharge baffle 250 and the metering cylinder 210; the torsion spring 251 is used for driving the discharge baffle 250 to elastically close the discharge hole 212. The outlet 212 of the metering cylinder 210 is used to add a predetermined volume of powder to the blender. The discharge baffle 250 can be adjusted by rotation to close or open the discharge port 212 below the metering cylinder 210. When the discharge gate 250 is not subjected to an external force, the torsion spring 251 applies a torque to the discharge gate 250 to urge the discharge gate 250 to a position closing the discharge port 212. When the material pressure of the metering cylinder 210 is sufficiently high, the discharge gate 250 can be opened against the torque of the torsion spring 251. Furthermore, the torsion spring belongs to a coil spring. The ends of the torsion spring are fixed to the other components, and as the other components rotate about the spring center, the spring pulls them back to the original position, creating a torque or rotational force. The torsion spring can store and release angular energy or statically hold a device by rotating a moment arm about the central axis of the spring body.

Referring to fig. 2, the switch mechanism 260 has a telescopic member 261 capable of telescopic operation; the telescopic part 261 can extend out when the discharge baffle 250 is in a position for closing the discharge port 212 so as to prevent the discharge baffle 250 from opening in a rotating mode. Referring to fig. 2, when the discharge baffle 250 is in a position for closing the discharge port 212, the telescopic member 261 of the switch mechanism 260 extends to abut against the discharge baffle 250 from below, and at this time, the discharge baffle 250 cannot be opened. When the retractable member 261 of the switch mechanism 260 is retracted, the take-off damper 250 can be forced open by the metering cylinder 210. The switch mechanism 260 is a pneumatic actuator or an electric actuator, and may be a cylinder, and the telescopic member 261 is a piston rod of the cylinder.

Referring to fig. 2, an electrically controlled valve 270 is installed at the upper end of the screw portion 222 of the push rod member 220; one end of the delivery hose 300 is connected with the powder conveying mechanism 400, and the other end is connected with the electric control valve 270; the electric control valve 270 can be adjusted to connect or disconnect the delivery hose 300 and the delivery channel 223; the powder conveying mechanism 400 is used for conveying powder in the storage bin 100 into the conveying hose 300. The electrically controlled valve 270 is located between the feeding passage 223 of the push rod member 220 and the feeding hose 300, and can be controlled by the controller to open or close the feeding passage 223 and the feeding hose 300. In addition, the powder conveying mechanism 400 is a tubular screw conveying device; the screw conveyer is installed at the bottom of the silo 100.

When the electrically controlled valve 270 is opened, the powder conveying mechanism 400 can inject the powder in the storage bin 100 into the metering cylinder 210 through the delivery hose 300 and the delivery passage 223 of the push rod member 220.

Referring to fig. 3, a distance sensor 500 is provided at the bottom of the sliding plug portion 221 for measuring the distance between the powder in the metering channel 213 and the bottom of the sliding plug portion 221. The distance sensor 500 can be used to measure the distance between the material level position inside the metering cylinder 210 and the bottom of the sliding plug portion 221. Specifically, the distance sensors 500 may be disposed at a plurality of positions at the bottom of the sliding plug portion 221, and the final measurement value may be determined by combining the distance values of different positions measured by the plurality of distance sensors 500, which may effectively reduce the measurement error.

Here, the distance sensor 500 can be used to determine whether or not the metering passage 213 below the bottom of the sliding plug portion 221 is filled with powder.

The controller can calculate the volume of the material in the metering cylinder 210 by determining the height of the material in the metering cylinder 210 according to the height of the bottom of the sliding plug 221 in the metering cylinder 210 and the distance measured by the distance sensor 500. In addition, since the density of the powder is constant, the controller can calculate the mass of the material in the cylinder 210.

Further, the powder storage and metering device further comprises a pressure sensor 600; the pressure sensor 600 is disposed at the bottom of the sliding plug portion 221, and is used for measuring the pressure between the powder in the metering channel 213 and the bottom of the sliding plug portion 221. Likewise, the pressure sensor 600 may be disposed at a plurality of positions at the bottom of the sliding plug portion 221 to reduce errors in measured data. Here, when the pressure sensor 600 measures the material pressure at the bottom of the sliding plug portion 221, it can be determined that the material level in the metering channel 213 has reached the bottom position of the sliding plug portion 221 and caused a certain pressure to the bottom of the sliding plug portion 221 when the material pressure exceeds a certain value. Here, the pressure sensor 600 can be used to determine whether or not the metering passage 213 below the bottom of the sliding plug portion 221 is filled with powder.

When the metering channel 213 below the bottom of the sliding plug 221 is filled with powder, the material height is the same as the height of the bottom of the sliding plug 221 in the metering cylinder 210, and the volume of the material in the metering cylinder 210 is obtained.

In addition, the metering cylinder 210 can be provided with a vibrating motor, and the vibrating motor can drive the metering cylinder 210 to vibrate together to make the upper surface of the material in the metering channel 213 more uniform and flat.

In the embodiment of the application, the powder storage and metering device further comprises a controller; the controllers are respectively connected to the actuating mechanisms and accurately control the actuating mechanisms. Specifically, the controller is respectively connected to the powder conveying mechanism 400, the electrically controlled valve 270, the power source 240, the switching mechanism 260, the distance sensor 500 and the pressure sensor 600. Under the control of the controller, the powder storage and metering device can perform volume and mass metering on the powder.

The working process of the powder storage and metering device is as follows: in the first step, the controller controls the powder conveying mechanism 400 to stop working. Secondly, the controller controls the power source 240 to drive the nut member 230 to rotate so as to move the push rod member 220 to the initial position; at this time, the height of the bottom of the sliding plug portion 221 is H1. Thirdly, the controller controls the telescopic component 261 of the switch mechanism 260 to extend out to prevent the discharge baffle 250 from rotating and opening; and fourthly, the controller controls the electric control valve 270 to be opened. Fifthly, the controller controls the powder conveying mechanism 400 to be opened to input powder into the metering channel 213, measures the distance L between the powder in the metering channel 213 and the bottom of the sliding plug part 221 through the distance sensor 500, determines the powder height H2 in the metering channel 213 according to the height H1 of the bottom of the sliding plug part 221 and the distance L, and determines the volume of the powder in the metering channel 213 according to the powder height H2, wherein the powder height H2 is equal to the height H1 of the bottom of the sliding plug part 221 minus the distance L, the metering channel 213 is in a fixed shape, the powder volumes at different heights are fixed values, and therefore, the volumes at different heights of the metering channel 213 can be calibrated in advance. Here, the mass of the powder can be calculated from the density after the volume of the powder is obtained. And sixthly, the controller controls the powder conveying mechanism 400 to be closed, controls the electric control valve 270 to be closed, controls the telescopic part 261 of the switch mechanism 260 to be retracted, and controls the power source 240 to drive the nut member 230 to rotate, so that the push rod member 220 moves downwards, the powder pushes the discharge baffle 250 to be pushed away, and the powder is discharged from the discharge hole 212, until the discharge is finished, the discharge baffle 250 closes the discharge hole 212 again under the action of the torsion spring 251. At this time, the powder is discharged from the discharge port 212 as the powder is pushed downward by the push rod member 220 to push the powder to open the discharge baffle 250 until the sliding plug portion 221 moves to a position close to the discharge baffle 250, at which time the powder in the metering passage 213 is completely discharged.

The application provides a metering device is stored to powder includes: the device comprises a storage bin 100 for storing powder, a metering component 200, a conveying hose 300, a powder conveying mechanism 400 and a distance sensor 500; the metering assembly 200 includes a metering cylinder 210, a push rod member 220, a nut member 230, a power source 240, a discharge baffle 250, a switch mechanism 260, and an electrically controlled valve 270. The technical scheme of this application can control the powder volume of blanking, and then the powder quality of control blanking to have following technological effect: first, need not to arrange weighing sensor in weighing box body periphery, the metering cylinder shape can set to the tube-shape, arranges easily in the space, and is less to other parts influence, is favorable to the space utilization of whole equipment. Secondly, can carry out volume measurement many times fast through the metering passage of measurement barrel, the volume that itself needs can be done for a short time.

Referring to fig. 4, the present application further proposes a powder metering method, which is applied to the powder storage and metering device mentioned in the above section, and includes the steps of:

step S401, controlling the powder conveying mechanism 400 to stop working;

step S402, controlling the power source 240 to drive the nut member 230 to rotate so as to move the push rod member 220 to the initial position; at this time, the height of the bottom of the sliding plug portion 221 is H1;

step S403, controlling the telescopic component 261 of the switch mechanism 260 to extend out to prevent the discharge baffle 250 from rotating and opening;

step S404, controlling the electric control valve 270 to open;

step S405, controlling the powder conveying mechanism 400 to be started to input powder into the metering channel 213, measuring the distance L between the powder in the metering channel 213 and the bottom of the sliding plug part 221 through the distance sensor 500, determining the height H2 of the powder in the metering channel 213 according to the height H1 and the distance L of the bottom of the sliding plug part 221, determining the volume of the powder in the metering channel 213 according to the height H2 of the powder, and calculating the mass of the powder according to the volume and the density of the powder;

step S406, closing the powder conveying mechanism 400, closing the electrically controlled valve 270, retracting the retractable part 261 of the switch mechanism 260, and controlling the power source 240 to drive the nut member 230 to rotate, so that the push rod member 220 moves downward, so that the powder pushes the discharge baffle 250 away to discharge from the discharge port 212, until the discharge is completed, the discharge baffle 250 closes the discharge port 212 again under the action of the torsion spring 251.

In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the present application as defined by the appended claims.