Powder feeding device

Abstract

The utility model provides a powder feeding device which comprises a machine frame, a hopper is arranged on the machine frame, a weighing sensor is arranged between the hopper and the machine frame, the hopper is provided with a feeding port, a stock bin and a discharging port which are communicated in sequence, and the machine frame is further provided with a vacuumizing assembly communicated with the stock bin. A rotatable striker plate and a first driving part in transmission connection with the striker plate are further arranged on the hopper, the striker plate covers an opening of the discharging opening, a knocking assembly is further arranged on the rack and comprises a mounting support, and a movable knocking block and a second driving part in transmission connection with the knocking block are arranged on the mounting support; the second driving piece drives the knocking block to get close to or away from the material blocking plate. According to the utility model, the technical problem that the discharging efficiency is influenced by the blockage of the hopper part caused by the accumulation of powder on the lower part of the hopper is solved, the technical effects of accelerating the powder discharging efficiency of the hopper and avoiding the blockage of the hopper are achieved, the powder loss caused by the adhesion of the powder on the inner wall of the hopper and the striker plate can be reduced, and the feeding precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of weighing equipment, in particular to a powder feeding device. Background Art

[0002] In the industrial production process, the powder needs to be weighed before being put into the reactor to ensure that a certain amount of powder is put into the reactor for reaction.

[0003] The Chinese utility model patent with the announcement number CN219135160U discloses a suspended quantitative powder weighing hopper, including a hopper, a valve assembly installed at the bottom of the hopper, a convex ring integrated with the hopper on the upper side of the outside of the hopper, a support ring sleeved on the outside of the hopper in close contact with the lower part of the convex ring, a weighing sensor attached to the convex ring is embedded on both sides of the upper end of the support ring, a lifting assembly is installed on both sides of the front and rear ends of the lower end of the support ring, a motor drive assembly for driving the lifting assembly to rise and fall is installed between the right parts of the lifting assembly, a PLC controller is installed on the right part of the motor drive assembly, the weighing sensor is connected to the PLC controller by signal, and the PLC controller is connected to the valve assembly. The above-mentioned suspended quantitative powder weighing hopper detects the weight of the hopper, the convex ring and the valve assembly through the weighing sensor. When the powder is discharged into the hopper, the weight increases, and the threshold value can be set in advance in the PLC controller. When the weight of the hopper reaches the threshold value, the valve assembly automatically opens to discharge the material, so that the hopper is suspended for weighing and quantitative discharge, which is not only convenient for discharging powder, but also reduces the workload of the staff.

[0004] The suspended quantitative powder weighing hopper disclosed in the above utility model patent adopts a valve assembly to control the opening and closing of the discharge port of the hopper. After the valve assembly opens the discharge port, the powder in the hopper is discharged from the hopper under the action of gravity. During the discharge of the powder, part of the powder will accumulate at the bottom of the hopper, causing partial blockage of the discharge port, affecting the discharge efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a powder feeding device, which solves the problem in the prior art that powder is accumulated at the lower part of the hopper, causing partial blockage of the hopper and affecting the discharge efficiency.

[0006] According to an embodiment of the utility model, a powder feeding device comprises a frame, a hopper is provided on the frame and a weighing sensor is provided between the hopper and the frame, the hopper is provided with a feed port, a silo and a discharge port which are connected in sequence, the frame is also provided with a vacuum pumping assembly which is connected with the silo, the hopper is also provided with a rotatable baffle plate and a first driving member which is transmission-connected to the baffle plate, the baffle plate covers the opening of the discharge port, the frame is also provided with a knocking assembly, the knocking assembly comprises a mounting bracket, a movable knocking block and a second driving member which is transmission-connected to the knocking block are provided on the mounting bracket, the second driving member drives the knocking block to approach or move away from the baffle plate.

[0007] Furthermore, a plurality of support plates are provided at intervals on the outer side wall of the hopper, and the support plates extend to the upper part of the frame in a direction away from the hopper, and the weighing sensor is provided between each of the support plates and the frame.

[0008] Furthermore, the vacuum pumping assembly includes a cylinder and an air suction pipe connected to the cylinder, the hopper is provided with an air suction port connected to the silo, and the cylinder is connected to the air suction port.

[0009] Furthermore, the frame is also provided with a connected screw conveyor and a feed pipe, and one end of the feed pipe away from the screw conveyor is connected to the feed port.

[0010] Furthermore, the first driving member includes a cylinder and a telescopic rod arranged at the output end of the cylinder, one end of the cylinder away from the telescopic rod is rotatably connected to the hopper, and one end of the telescopic rod away from the cylinder is rotatably connected to the baffle plate.

[0011] Furthermore, the second driving member includes a rocker arm, a first connecting rod, a crank and a second connecting rod, the rocker arm and the crank are respectively rotatably connected to the mounting bracket, the rocker arm is provided with a rotatable first connecting block, and the angle between the rotation axis of the first connecting block and the rotation axis of the rocker arm is an acute angle, one end of the crank is provided with a rotatable second connecting block, and the rotation axis of the second connecting block is perpendicular to the rotation axis of the crank, the two ends of the first connecting rod are respectively rotatably connected to the first connecting block and the second connecting block in a one-to-one correspondence, and the two ends of the second connecting rod are respectively rotatably connected to the crank and the knocking block in a one-to-one correspondence.

[0012] Furthermore, the second driving member also includes a motor fixed on the mounting bracket, and the rocker arm is drivingly connected to the output end of the motor.

[0013] Furthermore, a cover is provided on the mounting bracket, part of the second driving member is located in a space enclosed by the cover and the mounting bracket, and a slot for the striking block to pass through is provided on the cover.

[0014] Furthermore, the mounting bracket is also provided with a guide rail matched with the knocking block, and the length direction of the guide rail is consistent with the moving direction of the knocking block.

[0015] Furthermore, vertical plates are respectively provided on opposite sides of the material baffle plate, and the vertical plates are located on opposite sides of the discharge port and respectively fit with two opposite side surfaces of the hopper.

[0016] Compared with the prior art, the utility model has the following beneficial effects: by adopting a weighing sensor arranged between the hopper and the frame to weigh the powder in the silo added to the hopper, and when adding powder to the hopper, the gas in the silo is extracted by the vacuum assembly to generate negative pressure in the silo, so that the powder can enter the silo along the feed port, and when the weighing sensor detects that the weight of the powder in the silo reaches a preset value, the feeding into the hopper is stopped, and the first driving member drives the baffle plate to rotate to open the discharge port, at which time the material in the silo falls from the discharge port, and at the same time the second driving member drives the knocking block The baffle plate is moved back and forth and hits the baffle plate. The knocking block collides with the baffle plate to cause the baffle plate and the lower part of the hopper to vibrate, thereby preventing the powder from being retained in the lower part of the hopper and causing blockage of the discharge port and accelerating the falling of the powder. When the baffle plate and the hopper are shaken, the powder adhering to the baffle plate and the inner wall of the hopper can fall off. This solves the technical problem that the powder accumulates in the lower part of the hopper, causing partial blockage of the hopper and affecting the discharge efficiency, and produces the technical effect of accelerating the efficiency of discharging powder from the hopper and avoiding blockage of the hopper. It can also reduce the loss of powder caused by the adhesion of powder to the inner wall of the hopper and the baffle plate, and improve the feeding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a powder feeding device according to an embodiment of the utility model;

[0018] Figure 2 This is a front view of a powder feeding device according to an embodiment of the utility model when the discharge port is closed;

[0019] Figure 3 It is a partial cross-sectional view of a powder feeding device in one embodiment of the utility model when the discharge port is opened;

[0020] Figure 4 It is a partial exploded view of a striking component in a powder feeding device according to an embodiment of the utility model.

[0021] In the above drawings: 100, frame; 101, feed pipe; 200, hopper; 201, silo; 202, discharge port; 203, support plate; 300, weighing sensor; 400, vacuum assembly; 401, cylinder; 402, exhaust pipe; 500, baffle plate; 501, vertical plate; 600, first driving member; 601, cylinder; 602, telescopic rod; 700, knocking assembly; 701, mounting bracket; 702, knocking block; 703, second driving member; 704, rocker arm; 705, first connecting rod; 706, crank; 707, second connecting rod; 708, first connecting block; 709, second connecting block; 710, motor; 711, cover; 712, slot; 713, guide rail. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figures 1 to 4 As shown, the embodiment of the utility model proposes a powder feeding device, which is used to weigh the powder before adding it into the reactor to ensure that a certain amount of powder is added into the reactor for reaction during the production process.

[0024] Please refer to Figure 1 and Figure 2The powder feeding device includes a frame 100, on which a hopper 200 and a weighing sensor 300 are provided. The weighing sensor 300 is located between the hopper 200 and the frame 100 and is used to measure the weight of the hopper 200. The hopper 200 is provided with a feed port, a silo 201 and a discharge port 202 which are connected in sequence. A vacuum pumping component 400 is also provided on the frame 100 and the vacuum pumping component 400 is connected to the silo 201. The vacuum pumping component 400 is used to extract the gas in the silo 201 and form a negative pressure in the silo 201, so that the powder can enter the silo 201 along the feed port, and the feed port is measured by the weighing sensor 300. The weight of the powder added into the silo 201 is measured. When the weighing sensor 300 detects that the weight of the powder in the silo 201 reaches a preset value, the powder is stopped from being transported into the feed port to obtain a quantitative amount of powder. The hopper 200 is also provided with a rotatable baffle plate 500 and a first driving member 600 connected in transmission to the baffle plate 500. During the process of adding powder into the silo 201, the baffle plate 500 covers the opening of the discharge port 202 to close the discharge port 202. When the weight of the powder in the silo 201 reaches a preset value, the first driving member 600 drives the baffle plate 500 to rotate to open the discharge port 202 so that the powder in the silo 201 can be discharged from the discharge port. The discharge port 202 falls down, and the discharge port 202 can be connected to the feed end of the reactor and other equipment, so that the powder weighed in the hopper 200 can be directly put into the reactor for production; the frame 100 is also provided with a knocking component 700, and the knocking component 700 includes a mounting bracket 701 fixed to the frame 100, and a movable knocking block 702 and a second driving member 703 connected to the knocking block 702 are provided on the mounting bracket 701, and the second driving member 703 drives the knocking block 702 to reciprocate on the mounting bracket 701 and approach or move away from the baffle plate 500, and after the baffle plate 500 rotates to the position where the discharge port 202 is opened, the knocking When the striking block 702 approaches the material baffle plate 500, it collides with the material baffle plate 500, thereby causing the material baffle plate 500 and the hopper 200 to vibrate and preventing the powder from blocking the discharge port 202; the powder feeding device also includes a controller, which is electrically connected to the weighing sensor 300, the vacuum pumping component 400, the first driving member 600 and the second driving member 703 respectively, and the controller is used to receive the signal of the weighing sensor 300 and control the operation of the vacuum pumping component 400, the first driving member 600 and the second driving member 703 according to the signal sent by the weighing sensor 300, so that the powder feeding device can automatically complete feeding, weighing and discharging.

[0025] Specifically, the operating steps of weighing powder using the powder feeding device provided in this embodiment are as follows: first, the vacuum assembly 400 is turned on to extract the gas in the silo 201 and form a negative pressure in the silo 201; under the action of the negative pressure, the powder enters the silo 201 from the feed port and the weight of the powder entering the silo 201 is detected by the weighing sensor 300; when the weight of the powder in the silo 201 reaches a preset value, the powder is stopped from being transported to the hopper 200; then, the first driving member 600 drives the baffle plate 500 to rotate to open the discharge port 202 so that the material in the silo 201 falls from the discharge port 202 under the action of gravity; and at the same time, the second driving member 70 3. Start and drive the knocking block 702 to reciprocate and strike the baffle plate 500. When the knocking block 702 collides with the baffle plate 500, the baffle plate 500 and the lower part of the hopper 200 will vibrate, thereby preventing the powder from being retained in the lower part of the hopper 200, causing the discharge port 202 to be blocked and accelerating the falling of the powder. When the baffle plate 500 and the hopper 200 vibrate, the powder adhering to the inner wall of the baffle plate 500 and the hopper 200 can fall off. After the weighing sensor 300 detects that the weight reduction of the powder in the hopper 200 is consistent with the preset value, the first driving member 600 drives the baffle to reset and close the discharge port 202, and the second driving member 703 stops running. The powder feeding device provided in this embodiment accelerates the efficiency of discharging powder from the hopper 200 and avoids blockage of the hopper 200 through the collision of the knocking block 702 and the baffle plate 500, and when the baffle plate 500 and the hopper 200 vibrate under the impact of the knocking block 702, the powder attached to the inner wall of the hopper 200 and the baffle plate 500 can be shaken off, thereby reducing powder loss and improving feeding accuracy.

[0026] like Figure 1 and Figure 2 As shown, a plurality of support plates 203 are arranged at intervals on the outer wall of the hopper 200, and the support plates 203 extend to the upper part of the frame 100 in a direction away from the hopper 200, and the weighing sensor 300 is arranged between each of the support plates 203 and the frame 100. The support plates 203 are arranged on the outer wall of the hopper 200 and the weighing sensor 300 is arranged between the support plates 203 and the frame 100, so that the position of the hopper 200 on the frame 100 remains stable, and the hopper 200 remains in cooperation with the weighing sensor 300, thereby improving the accuracy of the data measured by the weighing sensor 300.

[0027] like Figure 2As shown, in this embodiment, the vacuum assembly 400 includes a cylinder 401 and an air extraction pipe 402 connected to the cylinder 401, and the hopper 200 is provided with an air extraction port connected to the silo 201, and the cylinder 401 is connected to the air extraction port. Through the cooperation between the cylinder 401 and the hopper 200, the air extraction port is kept connected to the vacuum assembly 400 while the silo 201 is kept closed, and the air extraction pipe 402 is used to connect the cylinder 401 with a vacuum generator and other equipment to extract the gas in the silo 201 from the air extraction port, so as to ensure that a stable negative pressure is formed in the silo 201.

[0028] In detail, the frame 100 is also provided with a screw conveyor and a feed pipe 101 connected to each other, and one end of the feed pipe 101 away from the screw conveyor is connected to the feed port. The screw conveyor is used to lift the powder to a position close to the feed port, and after the powder is conveyed to the feed pipe 101 by the screw conveyor, it enters the silo 201 under the action of the negative pressure in the silo 201, so that the powder is stably fed into the silo 201.

[0029] Please combine Figure 1 and Figure 2 The first driving member 600 includes a cylinder 601 and a telescopic rod 602 disposed at the output end of the cylinder 601. The end of the cylinder 601 away from the telescopic rod 602 is rotatably connected to the hopper 200, and the end of the telescopic rod 602 away from the cylinder 601 is rotatably connected to the baffle plate 500. The telescopic rod 602 can be driven to extend or retract into the cylinder 601 by the cylinder 601, so that the baffle plate 500 can be driven to rotate relative to the hopper 200 by the telescopic rod 602, and the rotation angle of the baffle plate 500 can be controlled by controlling the travel of the telescopic rod 602, thereby controlling the degree of opening of the discharge port 202, so as to control the speed of powder falling.

[0030] Specifically, vertical plates 501 are respectively provided on opposite sides of the baffle plate 500, and the vertical plates 501 are located on opposite sides of the discharge port 202 and respectively fit with two opposite sides of the hopper 200. The vertical plates 501 provided on both sides of the baffle plate 500 are used to prevent the powder discharged from the discharge port 202 from scattering to both sides of the baffle plate 500, ensuring that the powder falls into a preset area such as the feed end of the reactor when discharged from the hopper 200, and avoiding the powder from falling outside the preset area when discharged, causing the loss of powder.

[0031] Please refer to Figure 3 and Figure 4The second driving member 703 includes a rocker arm 704, a first connecting rod 705, a crank 706 and a second connecting rod 707. The rocker arm 704 and the crank 706 are rotatably connected to the mounting bracket 701 respectively. A rotatable first connecting block 708 is provided on the rocker arm 704, and the angle between the rotation axis of the first connecting block 708 and the rotation axis of the rocker arm 704 is an acute angle. A rotatable second connecting block 709 is provided at one end of the crank 706, and the rotation axis of the second connecting block 709 is perpendicular to the rotation axis of the crank 706. The two ends of the first connecting rod 705 are rotatably connected to the first connecting block 708 and the second connecting block 709 respectively in a one-to-one correspondence. The two ends of the second connecting rod 707 are rotatably connected to the crank 706 and the knocking block 702 respectively in a one-to-one correspondence. When the rocker arm 704 rotates, it drives the first connecting rod 705 to move and drives the crank 706 to swing back and forth. When the rocker arm 704 rotates, the first connecting block 708 rotates relative to the rocker arm 704, and the second connecting block 709 rotates relative to the crank 706, so that the first connecting rod 705 and the crank 706 can move smoothly. During the swinging of the crank 706, the second connecting rod 707 pulls or pushes the knocking block 702 to move back and forth in a straight line direction as the driving plate moves, thereby driving the knocking block 702 to intermittently collide with the baffle plate 500, causing the baffle plate 500 to vibrate to prevent the discharge port 202 from being blocked and affecting the discharge of powder from the hopper 200.

[0032] In detail, the second driving member 703 further includes a motor 710 fixed on the mounting bracket 701, and the rocker arm 704 is drivingly connected to the output end of the motor 710. The motor 710 drives the rocker arm 704 to rotate, thereby driving the knocking block 702 to move back and forth, ensuring that the knocking block 702 moves smoothly.

[0033] like Figure 3 and Figure 4 As shown, the mounting bracket 701 is further provided with a cover 711, part of the second driving member 703 is located in the space enclosed by the cover 711 and the mounting bracket 701, and the cover 711 is provided with a slot 712 for the striking block 702 to pass through. The cover 711 is used to protect part of the second driving member 703, reduce the adverse effects of the external environment on the operation of the second driving member 703, and help improve the stability of the striking assembly 700.

[0034] In this embodiment, the mounting bracket 701 is further provided with a guide rail 713 that matches the knocking block 702, and the length direction of the guide rail 713 is consistent with the moving direction of the knocking block 702. The guide rail 713 provided on the mounting bracket 701 is used to limit the moving direction of the knocking block 702, to prevent the knocking block 702 from deviating from the preset direction when moving, so that the knocking block 702 cannot contact the material baffle plate 500, to ensure that the knocking block 702 reciprocates along the preset track and collides with the material baffle plate 500, and to improve the reliability of the knocking assembly 700.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A powder feeding device, characterized in that: The machine comprises a frame, a hopper is provided on the frame and a weighing sensor is provided between the hopper and the frame, the hopper is provided with a feed port, a silo and a discharge port which are connected in sequence, the frame is also provided with a vacuum assembly which is connected with the silo, the hopper is also provided with a rotatable baffle plate and a first driving member which is transmission-connected with the baffle plate, the baffle plate covers the opening of the discharge port, the frame is also provided with a knocking assembly, the knocking assembly comprises a mounting bracket, a movable knocking block and a second driving member which is transmission-connected with the knocking block are provided on the mounting bracket, the second driving member drives the knocking block to approach or move away from the baffle plate.

2. A powder feeding device according to claim 1, characterized in that: A plurality of support plates are arranged at intervals on the outer side wall of the hopper, and the support plates extend to the upper part of the frame in a direction away from the hopper, and the weighing sensor is arranged between each of the support plates and the frame.

3. A powder feeding device according to claim 1, characterized in that: The vacuum pumping assembly comprises a cylinder and an air suction pipe connected to the cylinder, the hopper is provided with an air suction port connected to the silo, and the cylinder is connected to the air suction port.

4. A powder feeding device according to claim 1, characterized in that: The frame is also provided with a screw conveyor and a feed pipe which are connected to each other, and one end of the feed pipe away from the screw conveyor is connected to the feed port.

5. A powder feeding device according to claim 1, characterized in that: The first driving member includes a cylinder and a telescopic rod arranged at the output end of the cylinder, one end of the cylinder away from the telescopic rod is rotatably connected to the hopper, and one end of the telescopic rod away from the cylinder is rotatably connected to the baffle plate.

6. A powder feeding device according to claim 1, characterized in that: The second driving member includes a rocker arm, a first connecting rod, a crank and a second connecting rod. The rocker arm and the crank are respectively rotatably connected to the mounting bracket. The rocker arm is provided with a rotatable first connecting block, and the angle between the rotation axis of the first connecting block and the rotation axis of the rocker arm is an acute angle. One end of the crank is provided with a rotatable second connecting block, and the rotation axis of the second connecting block is perpendicular to the rotation axis of the crank. The two ends of the first connecting rod are respectively rotatably connected to the first connecting block and the second connecting block in a one-to-one correspondence, and the two ends of the second connecting rod are respectively rotatably connected to the crank and the knocking block in a one-to-one correspondence.

7. A powder feeding device according to claim 6, characterized in that: The second driving member also includes a motor fixed on the mounting bracket, and the rocker arm is drivingly connected to the output end of the motor.

8. A powder feeding device according to claim 1, characterized in that: A cover is also provided on the mounting bracket, part of the second driving member is located in a space enclosed by the cover and the mounting bracket, and a slot for the knocking block to pass through is provided on the cover.

9. A powder feeding device according to claim 1, characterized in that: The mounting bracket is also provided with a guide rail matched with the knocking block, and the length direction of the guide rail is consistent with the moving direction of the knocking block.

10. A powder feeding device according to claim 1, characterized in that: Vertical plates are respectively arranged on opposite sides of the material baffle plate. The vertical plates are located on opposite sides of the material discharge port and are respectively fitted with two opposite side surfaces of the hopper.

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