阅读说明：本技术 一种纤维微计量秤 (Fiber micro-metering scale ) 是由 陈联星 黄文景 邓小连 曾国炫 于 2018-06-29 设计创作，主要内容包括：本发明提供了一种纤维微计量秤,料仓的底部设有连通至计量机构的出口,出口的下方设置气动插板阀,出口的上方设置减压限料装置；气动插板阀用于打开货关闭出口；计量装置由计量斗、支架支座和二组秤量传感器组成,称重传感器一端与防尘罩外侧支架连接,称重传感器的另一端与计量斗底部连接；料仓中的物料通过送料装置对计量装置进行喂料,纤维物料添加至计量的90％,由控制系统发出信号,驱动送料装置中的变频电机作变频降速进行慢送料,达到目标计量值后,停止送料,同时关闭气动插板阀。本发明提供了一种纤维微计量秤,实现自动计量并且精度比较高。(The invention provides a fiber micro-metering scale.A port communicated to a metering mechanism is arranged at the bottom of a stock bin, a pneumatic gate valve is arranged below the port, and a pressure-reducing material-limiting device is arranged above the port; the pneumatic gate valve is used for opening the goods closing outlet; the metering device consists of a metering hopper, a bracket support and two groups of weighing sensors, wherein one end of each weighing sensor is connected with the bracket outside the dust cover, and the other end of each weighing sensor is connected with the bottom of the metering hopper; the material in the feed bin is fed to the metering device through the feeding device, the fiber material is added to 90% of the metering amount, the control system sends out a signal to drive the variable frequency motor in the feeding device to perform variable frequency speed reduction so as to perform slow feeding, the feeding is stopped after a target metering value is reached, and meanwhile, the pneumatic gate valve is closed. The invention provides a fiber micro-metering scale which realizes automatic metering and has higher precision.)

1. A fiber micro-metering scale, comprising: the device comprises a storage bin, a feeding device, a pneumatic gate valve, a metering device and a dust cover;

an outlet communicated to the metering mechanism is arranged at the bottom of the storage bin, the pneumatic gate valve is arranged below the outlet, and a pressure-reducing material-limiting device is arranged above the outlet; the pneumatic gate valve is used for opening the goods and closing the outlet;

the metering device consists of a metering hopper, a bracket support and two groups of weighing sensors, wherein one end of each weighing sensor is connected with the bracket outside the dust cover, and the other end of each weighing sensor is connected with the bottom of the metering hopper;

the material in the feed bin is fed to the metering device through the feeding device, the fiber material is added to 90% of the metering amount, the control system sends out a signal to drive the variable frequency motor in the feeding device to perform variable frequency speed reduction so as to perform slow feeding, the feeding is stopped after a target metering value is reached, and meanwhile, the pneumatic gate valve is closed.

2. A fiber micro-metering scale according to claim 1, wherein: the bottom of the storage bin is provided with a prolate cavity, the upper part of the cross section of the cavity is provided with a first transverse line, two sides of the cross section of the cavity are provided with vertical lines vertically connected with two ends of the transverse line, and the bottom of the cavity is provided with a second transverse line; and the second transverse line is in transitional connection with the tail ends of the two vertical lines through arc lines.

3. A fiber micro-metering scale according to claim 2, wherein: and the bottom of the cavity is provided with a convex block protruding towards the cavity in the area corresponding to the two second transverse lines.

4. A fiber micro-metering scale according to claim 3, wherein: the opening is arranged in the middle of the bottom of the cavity; the feeding device is arranged in the stock bin.

5. The fiber micro-metering scale of claim 4, wherein: the feeding device comprises two parallel spiral feeding rods, and the spiral directions of the two spiral feeding rods are opposite; the outlet is arranged in the area between the two spiral feeding rods, and the fibers are forced to move by the spiral feeding rods so as to be output from the outlet.

6. The fiber micro-metering scale of claim 5, wherein: among the screw feed rod, positive and negative blade arranges the number of turns on every screw feed rod and presses 3: 7 ratio distribution.

7. The fiber micro-metering scale of claim 6, wherein: the metering device adopts a split door structure, and ensures that a sufficient angle is larger than the repose angle of the material.

8. A fiber micro-metering scale according to claim 7, wherein: the dust cover consists of a bottom flange, a cloth sleeve and a cover body, wherein the bottom flange is connected with the stirring main machine and is connected with the cover body through the cloth sleeve.

Technical Field

The invention relates to a fiber micro-scale.

Background

The fiber is added into the building mortar to improve the crack resistance of the mortar, the fiber is widely applied to products such as concrete, mortar, plates and the like as a raw material, and the fiber is usually added by manual weighing and manual addition due to the characteristics of poor flowability, low density and the like. The manual feeding has the main problems that (1) the efficiency is low, and the requirement of automatic production cannot be met; (2) the labor cost is high; (3) the product quality can not be ensured, and phenomena of inaccurate weighing, missing and heavy throwing can occur; (4) there is a possibility of mechanical injury to people.

Patent "CN 201070838Y" of prior art, is directed to a device (1) for dosing fibers, such as glass fibers, plastic fibers or cellulose fibers, which are used in particular as an additive for engineering materials or plastics, said device having a container for a supply of fibers and a dosing device arranged on the bottom of the container (2) and a scale arranged in the conveying direction behind or below the dosing device. In order to be able to dose the fibres relatively precisely and to avoid the risk of fibre clumping, it is proposed that the bottom (3) of the container (2) has at least one outlet (4), that a feed mechanism for feeding the fibres to the outlet (4) is arranged in the bottom region in the container (2), and that two parallel brush rolls (5) which can be driven in opposite directions are arranged below the outlet (4), the opposite directions of rotation of which are oriented from top to bottom at their closest point. The structure of the scale is decrement metering, the scale body has heavy weight, a wide-range sensor is needed, and the wide-range calibration division value is increased under the condition of the same division number, so that the error is large, and the practical engineering application cannot be met; the bottom discharge port is in an open state, and when the materials are lack of materials for feeding, the materials are easy to fall, so that the metering is inaccurate.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a fiber micro-metering scale which realizes automatic metering and has higher precision.

In order to solve the above technical problem, the present invention provides a fiber micro-scale, comprising: the device comprises a storage bin, a feeding device, a pneumatic gate valve, a metering device and a dust cover;

an outlet communicated to the metering mechanism is arranged at the bottom of the storage bin, the pneumatic gate valve is arranged below the outlet, and a pressure-reducing material-limiting device is arranged above the outlet; the pneumatic gate valve is used for opening the goods and closing the outlet;

the metering device consists of a metering hopper, a bracket support and two groups of weighing sensors, wherein one end of each weighing sensor is connected with the bracket outside the dust cover, and the other end of each weighing sensor is connected with the bottom of the metering hopper;

the material in the feed bin is fed to the metering device through the feeding device, the fiber material is added to 90% of the metering amount, the control system sends out a signal to drive the variable frequency motor in the feeding device to perform variable frequency speed reduction so as to perform slow feeding, the feeding is stopped after a target metering value is reached, and meanwhile, the pneumatic gate valve is closed.

In a preferred embodiment: the bottom of the storage bin is provided with a prolate cavity, the upper part of the cross section of the cavity is provided with a first transverse line, two sides of the cross section of the cavity are provided with vertical lines vertically connected with two ends of the transverse line, and the bottom of the cavity is provided with a second transverse line; and the second transverse line is in transitional connection with the tail ends of the two vertical lines through arc lines.

In a preferred embodiment: and the bottom of the cavity is provided with a convex block protruding towards the cavity in the area corresponding to the two second transverse lines.

In a preferred embodiment: the opening is arranged in the middle of the bottom of the cavity; the feeding device is arranged in the stock bin.

In a preferred embodiment: the feeding device comprises two parallel spiral feeding rods, and the spiral directions of the two spiral feeding rods are opposite; the outlet is arranged in the area between the two spiral feeding rods, and the fibers are forced to move by the spiral feeding rods so as to be output from the outlet.

In a preferred embodiment: among the screw feed rod, positive and negative blade arranges the number of turns on every screw feed rod and presses 3: 7 ratio distribution.

In a preferred embodiment: the metering device adopts a split door structure, and ensures that a sufficient angle is larger than the repose angle of the material.

In a preferred embodiment: the dust cover consists of a bottom flange, a cloth sleeve and a cover body, wherein the bottom flange is connected with the stirring main machine and is connected with the cover body through the cloth sleeve.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

according to the fiber micro-metering scale provided by the invention, the independent module is adopted to be isolated from the stirring host machine, so that fibers are subjected to incremental metering in a static state to ensure the metering precision, the interference caused by the influence of feeding and stirring host machines is avoided, and the pneumatic gate valve is additionally arranged between the stock bin and the dust cover to reduce the influence of material dropping on the metering precision when the feeding is finished. The metering is carried out under the static condition, the metering precision is improved, and the metering error can be controlled within +/-25 g; the designed weighing range is within 5kg for measuring materials in one batch, and the small-range sensor is used for measuring the repeatability error of the materials in a static state stably so as to conveniently weigh in a short time and prevent numerical value drift in the weighing process.

Drawings

FIG. 1 is an exploded view of the structure of the preferred embodiment of the present invention;

fig. 2 is a perspective view of a preferred embodiment of the present invention.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

Referring to fig. 1-2, a fiber micro-metering scale comprising: the device comprises a storage bin 1, a feeding device 2, a pneumatic gate valve 3, a metering device 4 and a dust cover 5;

an outlet communicated to the metering mechanism is arranged at the bottom of the stock bin 1, the pneumatic gate valve 3 is arranged below the outlet, and a pressure-reducing material-limiting device is arranged above the outlet; the pneumatic gate valve 3 is used for opening and closing the outlet;

the metering device 4 consists of a metering hopper, a bracket support and two groups of weighing sensors, one end of each weighing sensor is connected with the bracket outside the dust cover 5, and the other end of each weighing sensor is connected with the bottom of the metering hopper; the control system collects the feedback signal of the weighing sensor to obtain the weight of the fiber in the weighing hopper, and the variable frequency motor in the feeding device is started to perform the metering work. The specific process is as follows:

the material in the storage bin 1 is fed to the metering device 4 through the feeding device 2, the fiber material is added to 90% of the metering amount, the control system sends out a signal to drive the variable frequency motor in the feeding device 2 to perform variable frequency speed reduction for slow feeding, the feeding is stopped after a target metering value is reached, and the pneumatic gate valve 3 is closed at the same time.

The concrete structure of the invention is as follows: in order to ensure that the materials can be uniformly delivered, the bottom of the storage bin 1 is provided with a prolate cavity, the upper part of the cross section of the cavity is provided with a first transverse line, two sides of the cross section of the cavity are provided with vertical lines vertically connected with two ends of the transverse line, and the bottom of the cavity is provided with a second transverse line; and the second transverse line is in transitional connection with the tail ends of the two vertical lines through arc lines. And the bottom of the cavity is provided with a convex block protruding towards the cavity in the area corresponding to the two second transverse lines. The feeding device extends along the axial direction of the cavity, the two arc lines can avoid the accumulation dead zone in the cavity, and the material can slide downwards along the arc surface under the action of the gravity of the material.

The opening is arranged in the middle of the bottom of the cavity; the feeding device 2 is arranged in the stock bin 1. The feeding device 2 is composed of two parallel spiral feeding rods, and the spiral directions of the two spiral feeding rods are opposite; the outlet is arranged in the area between the two spiral feeding rods, and the fibers are forced to move by the spiral feeding rods so as to be output from the outlet. In the spiral feeding rods, blades with opposite spiral directions are arranged on each spiral feeding rod; and positive and negative blade arrangement number of turns on every spiral feed rod is according to 3: 7 ratio distribution.

In a preferred embodiment: metering device 4 adopts to run from opposite directions the door structure, ensures to have enough angle to be greater than the angle of repose of material, can guarantee that spacing can smoothly discharge.

The dust cover 5 consists of a bottom flange, a cloth sleeve and a cover body, wherein the bottom flange is connected with the stirring main machine and is connected with the cover body through the cloth sleeve. The cloth cover plays a role in shock insulation, and the influence of vibration on metering is reduced.

According to the fiber micro-metering scale provided by the invention, the independent module is adopted to be isolated from the stirring host machine, so that fibers are subjected to incremental metering in a static state to ensure the metering precision, the interference caused by the influence of feeding and stirring host machines is avoided, and the pneumatic gate valve 3 is additionally arranged between the stock bin 1 and the dust cover 5 to reduce the influence of material dropping when the feeding is finished on the metering precision. The metering is carried out under the static condition, the metering precision is improved, and the metering error can be controlled within +/-25 g; the designed weighing range is within 5kg for measuring materials in one batch, and the small-range sensor is used for measuring the repeatability error of the materials in a static state stably so as to conveniently weigh in a short time and prevent numerical value drift in the weighing process.

While the foregoing is directed to the principles of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Other technical features than those described in the specification are known to those skilled in the art.