Classification bagging equipment for arsenic trioxide

Abstract

The utility model discloses arsenic trioxide grading and bagging equipment which comprises a stock bin and a grading device communicated with the stock bin, the grading device comprises a supporting frame, a device body and a screening assembly, a product discharging port is formed in the bottom of the device body, a long-neck ton bag is arranged below the discharging port, and a fixing plate and a rotating plate are erected below the supporting frame. A bag opening clamping assembly is hinged to the fixing plate, an opening rolling assembly is hinged to the rotating plate, the bag opening clamping assembly comprises a semicircular clamping jaw, a first connecting rod and a first air cylinder connected with the first connecting rod, the semicircular clamping jaw is opposite to the tail end of the discharging opening, and the opening rolling assembly comprises a pressing jaw capable of being buckled, a second connecting rod and a second air cylinder connected with the second connecting rod. And the pressing claw is lower than the discharge hole. Through the arrangement of the grading device, the bag opening clamping assembly and the opening rolling assembly, secondary grading before bagging, automatic bag opening fixing and automatic bag opening tightening after bagging are achieved, manual intervention is little, generation and dissipation of flying dust are effectively avoided, and the automatic bagging machine has the advantages of being controllable in quality and high in operation safety.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of arsenic trioxide split charging equipment, and particularly relates to a grading bagging equipment for arsenic trioxide. BACKGROUND

[0002] Arsenic trioxide is a white powder without odor and taste, commonly known as "white arsenic", which is highly toxic, and even a small amount of inhalation can cause great damage to human health. Arsenic trioxide products are generally stored in silos, and are split charged according to delivery requirements. The existing arsenic trioxide split charging method is mostly to manually bind a ton bag to the silo discharge port, and to manually bind the bag opening and replace a new ton bag when the preset split charging amount is reached. This split charging method is manually operated whether the ton bag is fixed or the bag opening is bound, and the operation time is long. However, arsenic trioxide dust inevitably exists in the split charging workshop, which greatly damages the health of the operators, especially when the bag opening is bound, the powder adhering to the bag opening is scattered by vibration, and high-concentration dust is easily generated. The operator is in close contact with the dust, and even if protective measures are taken, it is difficult to avoid inhaling some arsenic trioxide dust, and the operation safety risk is great. In addition, the existing split charging is mostly directly split charged from the silo, and due to the fact that the particle size distribution of the prepared product is within a certain range, and the arsenic trioxide powder is hardened in the silo during storage, the directly split charged arsenic trioxide powder has the problem that part of the product has a large or small particle size, which cannot meet the quality requirements, and especially when the customer has high requirements for product quality, this problem often leads to complaints. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims to provide a grading bagging equipment for arsenic trioxide to solve the problems of large dust in the workplace, difficult guarantee of the health of the operators, and insufficient control of product quality in the existing arsenic trioxide split charging.

[0004] The utility model realizes the following technical scheme:

[0005] The utility model provides a kind of trioxide arsenic's grading bagging equipment, its structure includes bunker, the bunker bottom is equipped with discharge gate;The discharge gate is communicated with grading device, and the grading device includes support frame, device main body and be equipped with screening assembly in main body interior;The screening assembly is used to screen qualified particle size trioxide arsenic powder, and the upper space of screening assembly is communicated with discharge pipe, and the discharge pipe is communicated for storing unqualified powder's barrel;Device main body bottom is equipped with discharge gate, and the discharge gate is equipped with pneumatic valve for controlling discharge, and long neck ton bag is equipped below the discharge gate, when using, the bag mouth of long neck ton bag is sleeved in the outside of the discharge gate end, and long neck ton bag is placed on weighing device;Support frame below is equipped with fixed plate, and the outer side of fixed plate is rotatably connected with rotary plate, and bag mouth clamping assembly is hinged below fixed plate, and bag mouth clamping assembly includes a pair of semicircular clamping jaw, first connecting rod and first cylinder connected with first connecting rod, and semicircular clamping jaw is opposite to the end of discharge gate, and first connecting rod is a set of oppositely arranged arc-shaped rods, and one end of first connecting rod is hinged to fixed plate, and the other end is fixedly connected with semicircular clamping jaw, and first cylinder is used to drive semicircular clamping jaw to be close to or away from each other;Rotary plate is connected with rotary motor for driving it to rotate, and bag mouth assembly is hinged below rotary plate, and bag mouth assembly includes a pair of pressure pincers that can be relatively buckled, second connecting rod and second cylinder connected with second connecting rod, and pressure pincers are opposite to the bag mouth of long neck ton bag and are lower than the discharge gate, and second connecting rod is a set of oppositely arranged arc-shaped rods, and one end of second connecting rod is hinged to rotary plate, and the other end is fixedly connected with pressure pincers, and second cylinder is used to drive pressure pincers to be close to or away from each other to tighten or loosen the bag mouth of long neck ton bag;

[0006] Based on the above technical scheme, by setting grading device between discharge gate and ton bag, regrading before bagging can be realized, and product quality is effectively guaranteed;By the setting of bag mouth clamping assembly and bag mouth assembly, operating personnel only need to perform two actions of bag mouth of long neck ton bag into discharge gate and roping, and the action of automatically fixing bag mouth and automatically tightening bag mouth is completed by the equipment, which reduces the workload of operating personnel, shortens the operation time, maximally avoids the generation and diffusion of dust, effectively guarantees the operation safety of operating personnel and reduces the damage to the health of operating personnel.

[0007] Further, the screening assembly is a vibrating screen obliquely arranged at the middle position in the device main body, and a vibrating motor is installed on the vibrating screen, and the discharge pipe is arranged on the lower side of the vibrating screen, which is beneficial to improve the working efficiency of grading bagging and has simple equipment structure.

[0008] Preferably, the discharge port of the hopper is a trumpet port, the edge of the discharge port extends outward to form an extension, the top of the device body is an open port, the open port is bent inward to form a bent portion, the extension and the bent portion overlap each other, and the extension is arranged below the bent portion, the extension and the bent portion together constitute an anti-dispersion structure between the device body and the discharge port to reduce the dispersion of arsenic trioxide dust generated by vibration through the connection between the two.

[0009] More preferably, an elastic sealing gasket is arranged between the bent portion and the extension, and the bent portion and the extension are movably connected through the elastic sealing gasket, which not only avoids hard contact between the two, but also further prevents dust from escaping from the contact gap between the two.

[0010] Preferably, the support frame and the device body are connected through a spring to avoid vibration transmission to the ground, causing vibration of surrounding equipment, and causing dust deposition on the ground.

[0011] Further, the end of the discharge port is provided with an annular groove, and the semicircular clamping jaw can be buckled with the annular groove. This design is beneficial to the semicircular clamping jaw to tightly clamp the bag opening of the long-neck ton bag on the discharge port to avoid accidental slipping.

[0012] Further, the semicircular clamping jaw is a hollow structure and is externally connected with a pulse low-pressure gas source, the lower surface of the semicircular clamping jaw is provided with an inclined inward gas outlet, and the gas outlet is circumferentially distributed. This design is beneficial to the airflow through the gas outlet to hit the bag opening, so that the arsenic trioxide powder adhering to the bag opening is shaken off into the ton bag, to keep the bag opening clean, thereby avoiding the adhered powder from escaping again during the process of roping or carrying, threatening the safety of workers.

[0013] Preferably, the pressing jaw is a pair of inverted long strip-shaped L-shaped pressing blocks that can be mutually embedded, the length of the L-shaped pressing block is greater than the length of the bag opening of the long-neck ton bag after being fitted, and the inner side of the L-shaped pressing block is provided with a pressure sensor to ensure that the bag opening can be tightly fitted and rotated to be tightened.

[0014] Further, the discharge port and the connection between the discharge port and the long-neck ton bag are both provided with a dust collection port connected with a negative pressure source. The design aims to collect the inevitable dust generated at the connection, further reduce the dust content in the workplace, and ensure that the particulate matter in the workplace meets the health standards.

[0015] Further, a control system is further included, the control system comprising a controller and a display screen, the display screen being arranged outside the work site, the control system being in signal connection with the pneumatic valve, the first cylinder, the second cylinder and the weighing device and controlling actions of the pneumatic valve, the first cylinder, the second cylinder and the weighing device, and the design purpose is that, through the arrangement of the control system, the unloading can be started or stopped according to the signal feedback of the weighing device, and the bag mouth clamping assembly and the roll mouth assembly can be controlled to execute related actions in a preset process and sequence, so that semi-automatic operation of the equipment is realized.

[0016] Advantages

[0017] The utility model discloses the advantages are:

[0018] 1) by setting the grading device between the discharge opening and the ton bag, the unqualified powder particles of particle size are removed before bagging, and re-automated grading is realized, so that the product quality is effectively ensured.

[0019] 2) through the arrangement of the bag mouth clamping assembly and the roll mouth assembly, the operator only needs to perform two actions of sleeving the bag mouth of the long neck ton bag into the discharge opening and tying the rope, and the device automatically fixes the bag mouth and automatically completes the action of tightening the bag mouth, which not only reduces the workload of the operator and shortens the operation time, but also maximally avoids the generation and diffusion of dust, effectively reduces the harmful dust content of the work site, ensures the operation safety of the operator and reduces the damage to the health of the operator. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects and advantages of the utility model will become more apparent through reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 It is the whole structure schematic diagram of the utility model;

[0022] Figure 2 It is the grading device structure schematic diagram of the utility model;

[0023] Figure 3 It is the utility model Figure 2 It is the enlarged schematic diagram of part A of the utility model;

[0024] Figure 4 It is the bag mouth clamping assembly schematic diagram of the utility model;

[0025] Figure 5 It is the bottom schematic diagram of the semicircular clamping jaw of the utility model;

[0026] Figure 6 It is the roll mouth assembly open state schematic diagram of the utility model;

[0027] Figure 7 It is the roll mouth assembly closed state schematic diagram of the utility model;

[0028] In the diagram: 1. Material bin; 11. Discharge port; 12. Extension; 2. Grading device; 21. Support frame; 22. Main body of the device; 221. Bending part; 23. Screening assembly; 231. Vibrating screen; 232. Vibrating motor; 24. Spring; 25. Elastic sealing gasket; 26. Discharge pipe; 27. Outlet; 271. Annular groove; 28. Pneumatic valve; 3. Material bucket; 4. Fixed plate; 5. Rotating plate; 51. Rotary motor; 6. Bag mouth clamping assembly; 61. Semi-circular gripper; 62. First connecting rod; 63. First cylinder; 63. Air outlet; 64. Air passage; 7. Rolling mouth assembly; 71. Pressing claw; 72. Second connecting rod; 73. Second cylinder; 8. Long-necked ton bag; 81. Bag mouth; 9. Weighing device; 10. Dust collection port. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0030] like Figures 1-7 As shown, this utility model provides a grading and bagging device for arsenic trioxide: its structure includes a silo 1, which is used to store finished arsenic trioxide powder. The bottom of the silo 1 is provided with a screw feeder (not shown in the figure) and a discharge port 11. The discharge port 11 of the silo 1 is a funnel mouth, and the edge of the discharge port 11 extends outward to form an extension 12. The discharge port 11 is connected to a grading device 2. The grading device 2 includes a support frame 21, a device body 22, and a screening component 23 disposed inside the device body 22.

[0031] The support frame 21 is connected to the device body 22 by a spring 24 to prevent vibration from being transmitted to the ground; the top of the device body 22 is open, such as... Figure 3 As shown, the open end is bent inward to form a bent portion 221. The bent portion 221 overlaps with the extension portion 12 on the discharge port 11, and the extension portion 12 extends below the bent portion 221. Preferably, an elastic sealing gasket 25 is provided between the bent portion 221 and the extension portion 12 to further prevent dust from escaping into the air. The extension portion 12 and the bent portion 221 together constitute the anti-escape structure between the main body 22 of the device and the discharge port 11. The screening component 23 is used to screen arsenic trioxide powder of qualified particle size. The upper space of the screening component 23 is connected to a discharge pipe 26, which is connected to a material bucket 3 for storing unqualified products. Preferably, the screening component 23 is a vibrating screen 231 inclinedly arranged in the middle position inside the main body 22 of the device. A vibrating motor 232 is installed on the vibrating screen 231. The number of vibrating screens 231 is determined according to the required powder particle size range to be screened. Figure 2As shown, in the device body 22 in the embodiment is provided with a first vibrating screen 231, the discharge pipe 26 is provided on the lower side of the vibrating screen 231 and communicates with the space above the vibrating screen 231, for removing the powder particles with large particle size. The device body 22 is provided with a discharge port 27 at the bottom, the discharge port 27 is provided with a pneumatic valve 28 for controlling the discharge, and a long-neck ton bag 8 is provided below the discharge port 27. In use, the bag opening 81 of the long-neck ton bag 8 is sleeved outside the end of the discharge port 27, the long-neck ton bag 8 is placed on a weighing device 9, and the weighing device 9 is used to detect the weight of the arsenic trioxide powder in the long-neck ton bag 8 in real time.

[0032] As shown in Figure 1 , Figure 4 、 Figure 6 and Figure 7 , the support frame 21 is provided with a fixed plate 4 below, the outer side of the fixed plate 4 is rotatably connected with a rotating plate 5 and provides support for the rotating plate 5, and the fixed plate 4 and the rotating plate 5 can be connected by common relative rotating structures such as sliding grooves, rollers and balls; the fixed plate 4 is hingedly connected with a bag opening clamping assembly 6 below, the rotating plate 5 is connected with a rotating motor 51 for driving the rotation thereof, in order to realize the rotation of the rotating plate 5, the outer edge of the rotating plate 5 can be provided with a toothed shape, the rotating motor 51 is arranged on the support frame 21 and its output shaft drives the rotating plate 5 to rotate by engaging with the rotating plate 5, and the rotating plate 5 is hingedly connected with a bag opening rolling assembly 7 below.

[0033] As shown in Figure 4 , the bag opening clamping assembly 6 includes a pair of semicircular clamping jaws 61, a first connecting rod 62 and a first cylinder 63 connected with the first connecting rod 62, the semicircular clamping jaws 61 are opposite to the end of the discharge port, the first connecting rod 62 is a set of oppositely arranged arc-shaped rods, one end of the first connecting rod 62 is hingedly connected to the fixed plate 4, and the other end is fixedly connected with the semicircular clamping jaw 61, and the two ends of the first cylinder 63 are hingedly connected with the middle portions of the two first connecting rods 62. When the first cylinder 63 acts, it drives the first connecting rod 62 to swing around the hinged point thereof with the fixed plate 4 and drives the semicircular clamping jaws 61 to relatively approach or move away from each other. Preferably, the end of the discharge port 27 is provided with an annular groove 271, which can be buckled with the semicircular clamping jaws 61 when the semicircular clamping jaws 61 relatively approach, so as to tightly clamp the bag opening 81 of the long-neck ton bag 8 in the annular groove 271 and avoid accidental slipping; as shown in Figure 6 、 7As shown, the roll mouth assembly 7 includes a pair of relatively buckling pressure clamps 71, a second connecting rod 72 and a second cylinder 73 connecting the second connecting rod 72, the pressure clamps 71 are arranged opposite to the bag mouth 81 of the long neck ton bag 8 and below the clamp area, the pressure clamps 71 are a pair of inverted long strip-shaped L-shaped clamps that can be mutually embedded, the length of the L-shaped clamps is greater than the length of the bag mouth 81 of the long neck ton bag 8 after fitting, the inner side of the L-shaped clamps is provided with a pressure sensor (not shown in the figure) to control the fitting degree, one end of the second connecting rod 72 is hinged to the rotating plate 5 (the hinged structure is not shown), the other end is fixedly connected to the pressure clamps 71, the two ends of the second cylinder 73 are hinged to the middle of the two second connecting rods 72, when the second cylinder 73 acts, it drives the second connecting rod 72 to swing around the hinge point with the rotating plate 5, and drives the pressure clamps 71 to relatively approach or move away to tighten or loosen the bag mouth 81 of the long neck ton bag 8.

[0034] Further, as shown in the figure, Figure 5 the semicircular clamping jaw 61 is a hollow structure and is externally connected to a pulse low-pressure gas source (not shown in the figure) through a gas path 64 arranged along the first connecting rod 62, the lower surface of the semicircular clamping jaw 61 is provided with inclined inward gas outlets 63, the gas outlets 63 are circumferentially distributed, and the pulse gas flow output through the gas outlets 63 beats the bag mouth 81, so that the arsenic trioxide powder adhered to the bag mouth 81 is shaken off and falls into the ton bag, so as to keep the bag mouth 81 clean, thereby avoiding that the adhered powder is again scattered in the process of roping or carrying, threatening the safety of the workers, the pulse low-pressure gas source can continuously work during the whole bagging process, or can be started after reaching a preset weight value, and is turned off after continuously outputting for a preset time length.

[0035] Further, as shown in the figure, Figure 1 the dust collection port 10 is connected with an external negative pressure source (not shown in the figure), the negative pressure of the dust collection port 10 timely discharges the dust generated at each connection place from the working place, and ensures that the particulate matter in the working place meets the health standards.

[0036] Further, the device of the embodiment also has a control system (not shown in the figure), the control system includes a controller and a display screen, the display screen is arranged outside the working place, the controller can be selected from common controller types such as PLC, the control system is signal connected with the pneumatic valve 28, the first cylinder 63, the second cylinder 73 and the weighing device 9 and controls the actions thereof.

[0037] In actual use, the long-neck ton bag 8 is placed on the weighing device 9 by manual operation, the bag opening 81 is sleeved into the discharge opening 27, and then the control system is started. The control system controls the first cylinder 63 to contract inwardly, the first cylinder 63 drives the first connecting rod 62 to drive the semicircular clamping jaw 61 to relatively approach, and the long-neck ton bag 8 is tightly attached to the clamp area of the discharge opening 27. The pneumatic valve 28 is opened, and the discharge opening 27 starts to discharge. The weighing device 9 feeds back the weight information to the control system. When the weight value reaches the preset value, the control system controls the pneumatic valve 28 to be closed, and controls the second cylinder 73 to contract inwardly. The second cylinder 73 drives the second connecting rod 72 to drive the pressing jaw 71 to relatively approach to be buckled with each other. The bag opening 81 of the long-neck ton bag 8 is pressed between the pressing jaws 71. After the pressing jaw 71 presses the bag opening 81, the first cylinder 63 extends outwardly to drive the semicircular clamping jaw 61 to relatively move away to loosen the bag opening 81. The rotating motor 51 drives the rotating plate 5 to rotate by a preset number of turns. The display screen displays the information that the bagging is completed. The operator enters the work site to tighten the bag opening 81, and then starts the control system again. The control system controls the second cylinder 73 to extend outwardly to open the pressing jaw 71 to release the bag opening 81. The rotating motor 51 drives the rotating plate 5 and the bag opening rolling assembly 7 to return to the initial state, and one operation is completed.

[0038] The embodiment can realize re-classification before bagging by arranging the grading device 2 between the discharge opening 11 and the ton bag, can screen the qualified product in particle size, and effectively guarantee the product quality. By arranging the bag opening clamping assembly 6, the bag opening rolling assembly 7 and the pulse airflow output on the semicircular clamping jaw 61, the operator only needs to perform two actions of sleeving the bag opening 81 of the long-neck ton bag 8 into the discharge opening 27 and roping, and the device automatically fixes the bag opening 81, automatically completes the actions of tightening and patting the bag opening 81, reduces the workload of the operator, shortens the operation time, maximally avoids the generation and diffusion of dust, effectively guarantees the operation safety of the operator, and reduces the damage to the health of the operator.

[0039] The above is only a preferred embodiment of the present application, and does not limit the technical scope of the present application. Any slight modification, equivalent change and modification made according to the technical essence of the present application still belongs to the protection scope of the present application.

Claims

1. A grading and bagging apparatus for arsenic trioxide comprising a bin having a discharge opening at the bottom thereof; characterized by: The grading device is connected with the discharging port, and comprises a supporting frame, a device body and a screening assembly arranged in the device body.

2. A graded packing apparatus for arsenic trioxide as claimed in claim 1, wherein: The screening assembly is a vibrating screen arranged in an inclined manner at a middle position in the device body.

3. A graded packaging apparatus for arsenic trioxide as claimed in claim 2 wherein: The vibrating motor is arranged on the vibrating screen.

4. A graded packaging apparatus for arsenic trioxide as claimed in claim 3 wherein: The discharging port is provided with an annular groove.

5. A graded packing apparatus for arsenic trioxide as claimed in claim 1 wherein: The half-circular clamping jaw is a hollow structure and is externally connected with a pulse low-pressure air source.

6. A graded packaging apparatus for arsenic trioxide as claimed in claim 1, wherein: The lower surface of the half-circular clamping jaw is provided with a plurality of inclined air outlets.

7. A graded packaging apparatus for arsenic trioxide as claimed in claim 1, wherein: The pressure sensor is arranged on the inner side of the L-shaped pressing block.

8. A graded packaging apparatus for arsenic trioxide as claimed in claim 1, wherein: The dust collection opening is connected with a negative pressure source.

9. A graded packaging apparatus for arsenic trioxide as claimed in claim 1, wherein: ​ 10. A graded packaging apparatus for arsenic trioxide as claimed in claim 1, wherein: Also included is a control system including a controller and a display screen located outside the work site, the control system being in signal connection with and controlling the operation of the pneumatic valve, the first cylinder, the second cylinder, and the weighing device.

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