WO2021217708A1

WO2021217708A1 - Powder feeding device

Info

Publication number: WO2021217708A1
Application number: PCT/CN2020/089511
Authority: WO
Inventors: 李鹏林
Original assignee: 南京韬恒工业科技有限公司
Priority date: 2020-04-30
Filing date: 2020-05-10
Publication date: 2021-11-04
Also published as: CN212173848U

Abstract

A powder feeding device, comprising: a container (1), a first valve (2) mounted at the bottom of the container (1), a weighing container (3) disposed below the container (1) and connected to the container (1), a second valve (4) mounted at the bottom of the weighing container (3), a first delivery pipe (5) disposed below the weighing container (3), a third valve (6) mounted at the bottom of the end of the first delivery pipe (5) away from the weighing container (3), a second delivery pipe (7) disposed below the third valve (6), and delivery components mounted inside the first delivery pipe (5) and the second delivery pipe (7). The feeding and delivery device is airtight, thereby avoiding the influence of dust in the external environment on the purity of materials during the weighing and delivery process, and the coordinative adjustment of the valves at different nodes and the multi-level delivery components enables delivery and weighing to be carried out at the same time, thus improving efficiency.

Description

Powder feeding device

Technical field

The utility model belongs to the technical field of blanking devices, and particularly relates to a powder blanking device.

Background technique

For the transportation and measurement of powder and granular materials, there are mainly two types of metering devices according to the measurement principle: volume and weight. According to the continuity of transportation and measurement, there are mainly two types: batch and continuous.

Therefore, the conveying of powder and granular materials has begun to become mechanized, and powder conveying devices have appeared, and weight sensors for weighing the mass of powder have been installed. However, most conveying devices are not sealed, which will cause external The entry of dust in the environment causes pollution. Moreover, it is necessary to transport directly after each weighing, and wait until the transport is completed before performing the second weighing, which repeatedly results in low transport efficiency.

technical problem

In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a powder feeding device.

Technical solutions

The utility model adopts the following technical scheme: A powder discharging device, comprising: a silo, a first valve installed at the bottom of the silo, a first valve arranged below the silo and connected to the silo The weighing bin, the second valve installed at the bottom of the weighing bin, the first conveying pipe arranged below the weighing bin, and the first conveying pipe installed at the bottom of one end of the first conveying pipe away from the weighing bin A third valve, a second conveying pipe arranged below the third valve, and conveying components installed inside the first conveying pipe and the second conveying pipe;

The second valve is located inside the first conveying pipe, the third valve is located inside the second conveying pipe, and the third valve is located at the end of the conveying assembly of the first conveying pipe.

In a further embodiment, the weighing bin includes: a connecting wall fixedly connected to the first valve, a discharge hopper clamped to the connecting wall, and uniformly fixed on the outer circumferential surface of the top of the discharge hopper Connecting ears, and a weighing sensor used to connect the connecting ears with the bin;

When there is no material inside the weighing bin, the weight detected by the weighing sensor is the weight of the discharge hopper; when there is material inside the weighing bin, the second valve is in a closed state, so The discharging hopper moves downward relative to the connecting wall under the force of the powder material, and the weight detected by the weighing sensor is the total weight of the discharging hopper and the material.

In a further embodiment, the first valve, the second valve, and the third valve have the same structure, and the first valve includes a valve body, which is hinged on the lower surface of the valve body at an equidistant distance. A triangular blade, one end hinged to a rotating piece at one of the top corners of the triangular blade, and a rotating ring hinged to the other end of the rotating piece;

The rotation of the rotating ring is used to control the opening and closing state of the triangular blades. When the triangular blades are in an open state, the hinged end of the rotating plate and the triangular blades is pushed out of the rotating ring, At this time, the triangular blade does not cover the inside of the valve body; when the triangular blade is in the closed state, the rotating piece overlaps the rotating ring, and the unhinged end of the triangular blade at this time contacts each other to form a Complete the closed state.

In a further embodiment, the triangular blade includes a first contact surface, a second contact surface, and a third contact surface, the first contact surface is an inwardly concave arc shape, and the second contact surface is Outer convex arc shape; the first contact surface is provided with an outward boss along its length direction, and the second contact surface is provided with an inward groove along its length direction;

When the triangular blade is in a closed state, the first contact surface and the adjacent second contact surface are in contact with each other, and the third contact surface forms a complete circle; the boss and the groove are clamped to each other.

In a further embodiment, the conveying assembly includes a rotating motor, a rotating rod connected to the output shaft of the rotating motor, and a spiral blade arranged along the axis of the rotating rod.

Beneficial effect

The utility model realizes the sealing performance of the blanking conveying device, avoids the influence of dust in the external environment on the purity of the material during the weighing and conveying process, and passes through the valves at different nodes and the middle of the multi-level conveying assembly Mutual adjustment realizes simultaneous conveying and weighing, which improves efficiency.

Description of the drawings

Figure 1 is a schematic structural diagram of a closed weighing, blanking and feeding device of the utility model.

Figure 2 is a partial cross-sectional view of a closed weighing, blanking and feeding device of the present invention.

Figure 3 is a schematic diagram of the structure of the weighing bin in the utility model.

Figure 4 is the first structural diagram of the first valve in the utility model.

Figure 5 is the second structural diagram of the first valve in the utility model.

Figure 6 is a schematic diagram of the structure of the triangular blade in the utility model.

The labels in Figures 1 to 6 are: silo 1, first valve 2, weighing silo 3, second valve 4, first conveying pipe 5, third valve 6, second conveying pipe 7, transition silo 8 , Valve body 201, triangular blade 202, rotating piece 203, rotating ring 204, first contact surface 205, second contact surface 206, third contact surface 207, connecting wall 301, discharge hopper 302, connecting ear 303, weighing sensor 304, a rotating rod 501, a spiral blade 502, and a rotating motor 503.

Embodiments of the present invention

The present invention will be further described below in conjunction with the description of the drawings and specific embodiments.

The inventor has discovered through practice that the following problems generally exist in the existing material discharging and conveying mechanism: First, there is a gap between weighing and conveying, which causes dust or dust in the external environment to fly into the device through the gap. Internally, it not only affects the concentration of powder, but also affects the accuracy of weighing. At the same time, the powder material is weighed every time it is conveyed, and the next wave of sub-materials cannot be weighed before the conveying is completed, so as to avoid affecting the quality of the previous wave of powder material, so the efficiency is very low.

For this reason, the inventor has developed a powder feeding device that can realize accurate measurement of materials and high-efficiency weighing and transmission.

As shown in FIG. 1, a closed weighing and unloading feeding device includes from top to bottom: a silo 1, a weighing silo 3, a first conveying pipe 5, and a second conveying pipe 7. A first valve 2 is provided between the silo 1 and the weighing silo 3, and the first valve 2 is used to control the discharge of materials in the silo 1. A second valve 4 is provided between the weighing bin 3 and the first conveying pipe 5, and the two valves are used to control the discharge of materials in the weighing bin 3. A third valve 6 is provided between the first conveying pipe 5 and the second conveying pipe 7, and the third valve 6 is used to control the discharge of materials in the first conveying pipe 5.

The first valve 2 is used to connect the silo 1 and the weighing silo 3 to ensure the tightness between the silo 1 and the weighing silo 3, and the third valve 6 is used to connect the first conveying pipe 5 and the second The second conveying pipe 7 ensures the tightness between the first conveying pipe 5 and the second conveying pipe 7.

The weighing bin 3 is shown in FIG. 3, the weighing bin 3 includes: a connecting wall 301 fixedly connected to the first valve 2, and a discharge hopper 302 that is clamped to the connecting wall 301 (the clamp passes through The interference fit achieves a movable and sealed connection), a connecting ear 303 uniformly fixed on the outer circumferential surface of the top of the discharge hopper 302, and a weighing sensor 304 for connecting the connecting ear 303 and the silo 1 ；

When there is no material inside the weighing bin 3, the weight detected by the weighing sensor 304 is the weight of the discharge hopper 302; when there is material inside the weighing bin 3, the second valve 4 In the closed state, the discharging hopper 302 moves downward relative to the connecting wall 301 under the force of the powder material, and the weight detected by the weighing sensor 304 is the total weight of the discharging hopper 302 and the material.

According to the above description, the discharge hopper 302 at the bottom of the weighing bin 3 will move up and down when the weighing bin 3 is working. Therefore, the second valve 4 at the bottom of the weighing bin 3 cannot be tightly connected with the first conveying pipe 5.

Therefore, in order to ensure the tightness between the weighing bin 3 and the first conveying pipe 5, the bottom of the discharge hopper 302 is first set as a cylinder, and the second valve 4 is set at the bottom end of the cylinder and in the first A sealing ring is provided at the connection between the conveying pipe 5 and the second valve 4, and the second valve 4 is located below the sealing ring. When the discharge hopper 302 moves up and down, the lowest point that the second valve 4 can reach It is flush with the highest point of the conveying assembly, and the highest point that the second valve 4 can reach is in contact with the bottom surface of the sealing ring, while ensuring that the cylinders move up and down in the sealing ring but do not touch each other, so as to avoid affecting the balance. The accuracy of the measurement sensor 304.

Thus, a closed connection between the weighing bin 3 and the first conveying pipe 5 is realized.

The conveying assembly includes a rotating motor 503, a rotating rod 501 connected to the output shaft of the rotating motor 503, and a spiral blade 502 axially arranged along the rotating rod 501.

The working process of this embodiment is as follows: Step 1. When the material does not need to be weighed and transferred, the first valve 2, the second valve 4, and the third valve 6 are all in a closed state;

Step 2. When the material needs to be weighed and conveyed, firstly open the first valve 2. The material in the discharge hopper 302 gives the downward pressure of the hopper 302 due to the action of gravity, so the weighing sensor 304 senses the discharge The total weight of the hopper 302 and the material, excluding the weight of the discharge hopper 302 is the weight of the powder inside the discharge hopper 302;

Step 3. When the weight displayed by the weighing sensor 304 is the required weight, close the first valve 2 and the driving motor, open the second valve 4 and the rotating motor 503 at the first conveying pipe 5, and realize the material through the spiral blade 502 , And the material in the first conveying pipe 5 enters the second conveying pipe 7 through the second valve 4;

Step 4. When the first conveying pipe 5 is being transported and there is no powder in the discharge hopper 302, that is, at this time, the weight detected by the weighing sensor 304 is the weight of the discharge hopper 302, and the second step is repeated. , When there is no powder in the first conveying pipe 5, perform step 3, that is, to ensure that the conveying and weighing are carried out at the same time;

Step 5. In Step 4, the third valve 6 is used to control the transportation rhythm between the first transportation pipeline 5 and the second transportation pipeline 7 to prevent the weight superimposition of the powder transportation in different times.

实施例Example 22

In Example 1, it is not difficult to see that after the material is weighed, the first-level transmission and the second-level transmission are realized, and in order to realize the complementary interference of the first-level transmission and the second-level transmission, the second valve 4 and the third valve 4 are provided. Valve 6 to achieve mutual restriction. However, the existing valve will cause material loss when discharging, that is, part of the material remaining on the valve, especially the powder after weighing, will cause the weight of the conveyed material to decrease, and there will be a large error.

For this reason, the inventor designed a valve that matches it and does not affect the weight of the material. First, the first valve 2, the second valve 4 and the third valve 6 have the same structure. Here, the first valve 2 is taken as an example, as shown in FIGS. 4 to 5. The one valve includes: a valve body 201, a triangular blade 202 hinged on the lower surface of the valve body 201 equidistantly, a rotating piece 203 hinged at one of the top corners of the triangular blade 202, and hinged to The rotating ring 204 at the other end of the rotating rod 501.

The working principle of the first valve 2 is as follows: the rotation of the rotating ring 204 is used to control the opening and closing state of the triangular blade 202. When the triangular blade 202 is in the open state, the rotating plate 203 and The hinged end of the triangular blade 202 is pushed out of the rotating ring 204. At this time, the triangular blade 202 does not cover the inside of the valve body 201; when the triangular blade 202 is in the closed state, the rotating piece 203 It overlaps with the rotating ring 204, and the non-hinged ends of the triangular blade 202 at this time contact each other to form a completed closed state.

The above-mentioned valve is set to avoid weight deviation caused by the loss of materials. Therefore, when the triangular blade 202 is in a closed state, in order to prevent the material from seeping out from the gap, the triangular blade 202 is further improved. As shown in FIG. 6, the triangular blade 202 includes a first contact surface 205, a second contact surface 206, and a third contact surface 207. The first contact surface 205 is an inwardly concave arc shape. The contact surface 206 has an outwardly convex arc shape; the first contact surface 205 is provided with an outward boss along its length direction, and the second contact surface 206 is provided with an inward groove along its length direction ( Not shown in the figure). When the triangular blade 202 is in the closed state, the sealing connection is realized by the clamping of the boss and the groove, which solves the problem of powder leakage from the gap.

The setting of the valve of this structure avoids the problem that the material stays on the valve every time the material is discharged, especially in the process of conveying the material after it has been weighed, and increases the accuracy.

And the valve body 201 of the second valve 4 is coaxially connected with the column at the bottom of the discharge hopper 302, and the inner diameters are all the same. The top of the valve body 201 of the third valve 6 is directly connected to the bottom of the first conveying pipe 5 in an arc shape, That is to ensure that there is no possibility of accumulation of powder at the joint.

Claims

A powder discharging device, characterized by comprising: a silo, a first valve installed at the bottom of the silo, a weighing silo arranged below the silo and connected to the silo, A second valve installed at the bottom of the weighing bin, a first delivery pipe provided below the weighing bin, and a third valve installed at the bottom of one end of the first delivery pipe away from the weighing bin, A second conveying pipe arranged below the third valve, and conveying components installed inside the first conveying pipe and the second conveying pipe;

The second valve is located inside the first conveying pipe, the third valve is located inside the second conveying pipe, and the third valve is located at the end of the conveying assembly of the first conveying pipe.
The powder discharging device according to claim 1, wherein the weighing bin comprises: a connecting wall fixedly connected to the first valve, and a discharge hopper clamped to the connecting wall, uniformly A connecting ear fixed at the outer circumferential surface of the top of the discharge hopper, and a weighing sensor for connecting the connecting ear and the silo;

When there is no material inside the weighing bin, the weight detected by the weighing sensor is the weight of the discharge hopper; when there is material inside the weighing bin, the second valve is in a closed state, so The discharging hopper moves downward relative to the connecting wall under the force of the powder material, and the weight detected by the weighing sensor is the total weight of the discharging hopper and the material.
The powder discharging device according to claim 1, wherein the structure of the first valve, the second valve and the third valve are the same, and the first valve includes: a valve body, which is equidistant A triangular blade hinged on the lower surface of the valve body, one end hinged to a rotating piece at one of the top corners of the triangular blade, and a rotating ring hinged to the other end of the rotating piece;

The rotation of the rotating ring is used to control the opening and closing state of the triangular blades. When the triangular blades are in an open state, the hinged end of the rotating plate and the triangular blades is pushed out of the rotating ring, At this time, the triangular blade does not cover the inside of the valve body; when the triangular blade is in the closed state, the rotating piece overlaps the rotating ring, and the unhinged end of the triangular blade at this time contacts each other to form a Complete the closed state.
The powder cutting device according to claim 3, wherein the triangular blade includes a first contact surface, a second contact surface, and a third contact surface, and the first contact surface is an inward depression The second contact surface has an outwardly convex arc shape; the first contact surface is provided with an outward boss along its length direction, and the second contact surface is provided with a direction along its length direction. Inner groove

When the triangular blade is in a closed state, the first contact surface and the adjacent second contact surface are in contact with each other, and the third contact surface forms a complete circle; the boss and the groove are clamped to each other.
The powder unloading device according to claim 1, wherein the conveying assembly includes a rotating motor, a rotating rod connected to the output shaft of the rotating motor, and an axially arranged rotating rod. Spiral blades.