Continuous sieving and weighing device

Abstract

The invention discloses a continuous screening and weighing device, and relates to the technical field of powder screening and weighing. The device comprises a rack, a screening mechanism, a weighing mechanism and a charging bucket, and further comprises a vibrating feeder arranged in the rack; the end, close to the weighing mechanism, of the vibrating feeder fixedly communicates with a discharging pipe, a sleeve is slidably arranged on the peripheral face of the discharging pipe, two blocking plates used for intercepting powder in the sleeve are rotationally arranged at the bottom of the inner wall of the sleeve, and the driving mechanism is arranged on the peripheral face of the sleeve. The sleeve extends into the material tank so that dissipation of dust can be reduced, when the sleeve moves downwards, the driving block drives the two limiting rods to rotate downwards, so that the two blocking plates are driven to rotate, accumulated powder is released, buffering is provided for follow-up falling powder, and the weighing error, caused by direct impact, of the weighing mechanism is reduced; the driving block moves upwards to drive the blocking plate to rotate to block the sleeve, so that most of falling powder in the discharging pipe and the sleeve is intercepted, and the weighing precision is improved.

Description

Technical Field

[0001] This invention relates to the field of powder screening and weighing technology, and specifically to a continuous screening and weighing device. Background Technology

[0002] Continuous sieving and weighing devices are automated equipment that integrates sieving and continuous weighing functions. They are mainly used in industrial production to continuously sieve bulk and powdery materials to remove impurities and large particles. They are important equipment for improving efficiency and ensuring quality in modern industrial automated production.

[0003] During screening and weighing, powdery materials fall onto the material conveying module after passing through the screening device. To ensure sealing and prevent dust from escaping, a vibrating feeder is often used as the material conveying module. The vibrating feeder feeds the screened powder into the silo, which is usually placed on a weighing mechanism for weighing.

[0004] In some existing technologies, the powder conveyed in the vibrating feeder is directly fed into the hopper. In order to facilitate the replacement of the hopper, there is usually a long distance between the discharge port of the vibrating feeder and the inlet of the hopper. This will cause dust to be easily scattered into the air when the powder falls. Moreover, the weighing device will usually transmit a signal to the vibrating feeder to stop feeding after the hopper reaches the specified weight. However, at this time, the powder falling between the discharge port of the vibrating feeder and the inlet of the hopper will still fall into the hopper, which has a significant impact on the accuracy of the weighing. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous sieving and weighing device to overcome the above-mentioned shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a continuous sieving and weighing device, comprising a frame, on which a sieving mechanism and a weighing mechanism are provided, and a material tank is placed on the weighing mechanism; and a vibrating feeder is also provided within the frame; a feeding pipe is fixedly connected to one end of the vibrating feeder near the weighing mechanism, a sleeve is slidably provided on the outer circumferential surface of the feeding pipe, and two sealing plates for intercepting powder in the sleeve are rotatably provided at the bottom of the inner wall of the sleeve; a driving mechanism is provided on the outer circumferential surface of the sleeve, the driving mechanism drives the sleeve to descend and extend into the material tank to reduce dust dispersion, and drives the two sealing plates to tilt to reduce the impact force of falling powder.

[0007] Preferably, two rotating shafts are rotatably arranged inside the sleeve, and each of the sealing plates is fixedly connected to each of the rotating shafts in a one-to-one correspondence.

[0008] Preferably, each of the sealing plates has a rubber strip fixedly installed on its outer peripheral surface.

[0009] As preferred, the driving mechanism comprises two hydraulic cylinders fixedly arranged on the side of the vibrating feeder close to the discharging pipe, and each hydraulic cylinder has a driving block fixedly arranged at the tail end of the piston rod.

[0010] As preferred, each driving block is provided with two movable grooves, each movable groove is slidably provided with a limiting rod, each rotating shaft is fixedly provided with a connecting plate at both ends, and each connecting plate is fixedly connected with a corresponding limiting rod.

[0011] As preferred, the outer circumferential surface of the sleeve is fixedly provided with two fixed plates, each fixed plate is provided with an arc groove, and each limiting rod slides in a corresponding arc groove.

[0012] As preferred, the outer circumferential surface of the discharging pipe is provided with two sliding grooves, and the inner wall of the sleeve is fixedly provided with two sliding blocks matched with the sliding grooves.

[0013] As preferred, a spring is fixedly arranged between the vibrating feeder and the sleeve.

[0014] In the above technical solution, the present application provides a continuous screening and weighing device, which has the following advantages: the extension of the sleeve into the material tank can reduce the dispersion of dust, and when the sleeve moves downward, the driving block drives the two limiting rods to rotate downward, thereby driving the two blocking plates to rotate, releasing the accumulated powder, and providing a buffer for the subsequent falling powder, reducing the weighing error caused by direct impact. The upward movement of the driving block can first drive the blocking plate to rotate to block the sleeve, thereby intercepting most of the falling powder in the sleeve and the discharging pipe, reducing the additional powder falling into the material tank, and improving the weighing accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0016] Figure 1 The overall structural schematic diagram provided by the embodiments of the present application is provided.

[0017] Figure 2 The structural schematic diagram of the material tank provided by the embodiments of the present application is provided.

[0018] Figure 3 The structural schematic diagram provided by the embodiments of the present application is provided. Figure 1 The structural enlarged view of A in the above figure is provided.

[0019] Figure 4 The structural schematic diagram of the sleeve provided by the embodiments of the present application is provided.

[0020] Figure 5 The structure diagram of the plugging plate provided by the embodiment of the application is shown.

[0021] Explanation of reference signs:

[0022] 1, rack; 2, sieving mechanism; 3, vibrating feeder; 4, weighing mechanism; 5, discharging pipe; 6, chute; 7, sleeve; 701, fixed plate; 8, spring; 9, sliding block; 10, rotating shaft; 11, plugging plate; 12, connecting plate; 13, arc groove; 14, limiting rod; 15, driving block; 16, movable groove; 17, hydraulic cylinder; 18, rubber strip; 19, material tank; 20, feeding port. DETAILED DESCRIPTION

[0023] In order to make the skilled in the art better understand the technical solutions of the application, the application will be further described in detail below with reference to the drawings.

[0024] Please refer to Figures 1-5A continuous screening and weighing device, comprising a rack 1, a screening mechanism 2 and a weighing mechanism 4 arranged on the rack 1, a material tank 19 placed on the weighing mechanism 4, and a vibrating feeder 3 arranged in the rack 1; the vibrating feeder 3 is fixedly connected with a discharging pipe 5 at one end close to the weighing mechanism 4, the outer periphery of the discharging pipe 5 is slidably provided with a sleeve 7, two blocking plates 11 for intercepting the powder in the sleeve 7 are rotatably arranged on the inner wall of the sleeve 7, and a driving mechanism is arranged on the outer periphery of the sleeve 7; the driving mechanism drives the sleeve 7 to descend and extend into the material tank 19 to reduce the dust dispersion, and drives the two blocking plates 11 to tilt to reduce the impact force of the falling powder; note that the screening mechanism 2 and the weighing mechanism 4 are prior art and will not be described in detail here; the discharge port of the screening mechanism 2 is connected with the feeding part of the vibrating feeder 3, the discharging pipe 5 is arranged at the bottom of the end of the vibrating feeder 3 away from the screening mechanism 2, the material discharged from the screening mechanism 2 enters the vibrating feeder 3, and then is conveyed to the material tank 19 by the vibrating feeder 3, and falls into the material tank 19 from the discharging pipe 5 when reaching the discharging pipe 5; the weighing mechanism 4 is integrated with a weighing sensor and a data acquisition and transmission module, and a controller is further arranged on the rack 1 and electrically connected with the data acquisition and transmission module; the weight of the material tank 19 is transmitted to the controller in real time through the data acquisition and transmission module; in use, the feeding port 20 of the material tank 19 is aligned with the discharging pipe 5, and then the driving mechanism is started to drive the sleeve 7 to descend and extend into the feeding port 20 of the material tank 19; at this time, the vibrating feeder 3 is started; due to the sealing effect of the discharging pipe 5 and the sleeve 7, the dust generated by the powder conveyed by the vibrating feeder 3 will not overflow, but will fall into the material tank 19; when the sleeve 7 descends to the limit, the driving mechanism drives the two blocking plates 11 to tilt downward; at this time, the powder falling from the vibrating feeder 3 will first impact on the blocking plates 11 for buffering, and then fall into the material tank 19; compared with the powder directly falling into the material tank 19, the weighing error caused by the large impact force of the falling powder can be reduced; when the weight of the powder in the material tank 19 reaches a specified value, the weighing mechanism 4 transmits a signal to the controller through the data acquisition and transmission module; after receiving the signal, the controller controls the driving mechanism to move the sleeve 7 upward; in the moving process, the controller first rotates the blocking plates 11 to be horizontal, so as to block the opening of the sleeve 7, preventing the powder in the sleeve 7 and the discharging pipe 5 from continuously falling into the material tank 19 and causing the weight of the material tank 19 to exceed the preset value; then the sleeve 7 is moved out of the material tank 19; at this time, the material tank 19 can be replaced, and the material conveyed by the vibrating feeder 3 will temporarily accumulate in the discharging pipe 5 and the sleeve 7, so that the material tank 19 can be continuously replaced without stopping.

[0025] Specifically, two rotating shafts 10 are arranged in the sleeve pipe 7, and each sealing plate 11 is fixedly connected with each rotating shaft 10; the outer circumferential surfaces of the two rotating shafts 10 are sleeved with rubber sleeves and abut against each other, so that the powder can be prevented from leaking out of the gap between the two rotating shafts 10; the end portions of each rotating shaft 10 penetrate through the sleeve pipe 7, and the two sealing plates 11 are fixed on the corresponding rotating shafts 10 and rotate in the sleeve pipe 7.

[0026] Further, the outer circumferential surface of each sealing plate 11 is fixedly provided with a rubber strip 18; the rubber strip 18 is fixedly arranged on the arc edge of the sealing plate 11, and when the two sealing plates 11 are rotated to be horizontal, the abutment of the rubber strip 18 and the inner wall of the sleeve pipe 7 can prevent the powder from leaking out.

[0027] In another embodiment of the present application: the driving mechanism includes two hydraulic cylinders 17 fixedly arranged on the side of the vibrating feeder 3 close to the discharge pipe 5, and each hydraulic cylinder 17 is fixedly provided with a driving block 15 at the tail end of the piston rod; the controller is signal-connected with the two hydraulic cylinders 17, the two hydraulic cylinders 17 are uniformly fixed on the two sides of the discharge pipe 5, the piston rod of the hydraulic cylinder 17 faces downward, the driving block 15 is driven to move up and down by the hydraulic cylinder 17, so as to drive the sleeve pipe 7 to move up and down, after the material tank 19 reaches the preset value, the controller starts the hydraulic cylinder 17 to drive the driving block 15 to move up, and after the material tank 19 is replaced, the driving block 15 is controlled to move down.

[0028] Further, two movable grooves 16 are formed in each driving block 15, each movable groove 16 is slidably provided with a limiting rod 14, each end of each rotating shaft 10 is fixedly provided with a connecting plate 12, and each connecting plate 12 is fixedly connected with each limiting rod 14 in a one-to-one manner; the end portion of the rotating shaft 10 penetrates through the sleeve pipe 7 and is fixedly connected with the connecting plate 12, and when the driving block 15 is driven to move up and down by the hydraulic cylinder 17, the sealing plate 11 is driven to rotate through the cooperation of the movable groove 16 and the limiting rod 14.

[0029] Further, two fixed plates 701 are fixedly arranged on the outer circumferential surface of the sleeve pipe 7, each fixed plate 701 is provided with an arc groove 13, and each limiting rod 14 slides in each arc groove 13 in a one-to-one manner; the arc groove 13 is used for limiting and guiding the movement track of the limiting rod 14, so as to limit the rotating angle of the two sealing plates 11, when the driving block 15 is driven to move up by the hydraulic cylinder 17, the driving block 15 drives the limiting rod 14 to move to the top end of the arc groove 13, at this time, the sealing plate 11 is rotated to be horizontal to seal the sleeve pipe 7, and the driving block 15 is continuously moved up, the driving block 15 drives the limiting rod 14 to move up, and the sleeve pipe 7 is driven to move up through the arc groove 13, so that the sleeve pipe 7 is moved out of the material tank 19.

[0030] Specifically, two sliding grooves 6 are arranged on the outer circumferential surface of the downcomer 5, and two sliding blocks 9 adapted to the sliding grooves 6 are fixedly arranged on the inner wall of each sleeve 7; the sleeve 7 slides on the downcomer 5 through the cooperation of the sliding grooves 6 and the sliding sleeves, and is limited by the cooperation of the sliding grooves 6 and the sliding blocks 9 to prevent it from falling off the downcomer 5, and after the sleeve 7 falls to the lower end limit of the arc groove 13 driven by the hydraulic cylinder 17, the driving block 15 continues to move downward to drive the two blocking plates 11 to open and have a certain inclination angle, so as to release the powder accumulated in the downcomer 5 and provide buffer for the subsequent falling powder.

[0031] Further, the spring 8 is fixedly arranged between the vibrating feeder 3 and the sleeve 7; the elastic force of the spring 8 is greater than the impact force of the falling powder, and when the sleeve 7 is driven upward by the hydraulic cylinder 17, the sleeve 7 has a force to resist the upward movement due to the spring 8, at this time the driving block 15 drives the limiting rod 14 to rise first, so as to make the two blocking plates 11 rotate to be horizontal first, and then drive the sleeve 7 to rise, which can seal the end of the sleeve 7 first when the weight of the hopper 19 reaches a specified value, so as to reduce the additional powder falling into the hopper 19.

[0032] The above only describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A continuous sieving and weighing device, comprising a frame (1), wherein a sieving mechanism (2) and a weighing mechanism (4) are provided on the frame (1), and a material tank (19) is placed on the weighing mechanism (4), characterized in that, It also includes a vibrating feeder (3) installed in the frame (1); The vibrating feeder (3) is fixedly connected to a feeding pipe (5) at one end near the weighing mechanism (4). A sleeve (7) is slidably provided on the outer circumference of the feeding pipe (5). Two sealing plates (11) for intercepting powder in the sleeve (7) are rotatably provided at the bottom of the inner wall of the sleeve (7). The drive mechanism is located on the outer circumference of the sleeve (7). The drive mechanism drives the sleeve (7) to descend and extend into the material tank (19) to reduce dust dispersion, and drives the two sealing plates (11) to tilt to reduce the impact force of falling powder.

2. The continuous sieving and weighing device according to claim 1, characterized in that, The sleeve (7) is rotatably provided with two rotating shafts (10), and each of the sealing plates (11) is fixedly connected to each of the rotating shafts (10) in a one-to-one correspondence.

3. The continuous sieving and weighing device according to claim 1, characterized in that, Each of the sealing plates (11) has a rubber strip (18) fixedly installed on its outer circumferential surface.

4. The continuous sieving and weighing device according to claim 1, characterized in that, The driving mechanism includes two hydraulic cylinders (17) fixedly installed on the side of the vibrating feeder (3) near the feed pipe (5), and a driving block (15) is fixedly installed at the end of the piston rod of each hydraulic cylinder (17).

5. A continuous sieving and weighing device according to claim 4, characterized in that, Each of the drive blocks (15) has two movable slots (16), each movable slot (16) is slidably provided with a limit rod (14), and each of the rotating shafts (10) has a connecting plate (12) fixedly provided at both ends, and each connecting plate (12) is fixedly connected to each limit rod (14) in a one-to-one correspondence.

6. A continuous sieving and weighing device according to claim 5, characterized in that, Two fixing plates (701) are fixedly installed on the outer circumferential surface of the sleeve (7). Each fixing plate (701) has an arc groove (13) and each limiting rod (14) slides in the arc groove (13) in a corresponding manner.

7. A continuous sieving and weighing device according to claim 1, characterized in that, The outer circumferential surface of the feed tube (5) has two grooves (6), and the inner wall of each sleeve (7) is fixedly provided with two sliders (9) that are adapted to the grooves (6).

8. A continuous sieving and weighing device according to claim 1, characterized in that, A spring (8) is fixedly installed between the vibrating feeder (3) and the sleeve (7).

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