CN220662914U - High-speed ton packagine machine that can accurate measurement dust - Google Patents

Abstract

A high-speed ton packaging machine capable of accurately measuring dust relates to the field of packaging equipment and comprises a dust remover, a feeding device, a double-path return air pipeline assembly and an emergency gas storage device; the feeding device comprises a main blanking channel, a buffer hopper and a feeding screw, wherein a discharge hole of the buffer hopper is communicated with the feeding screw, and a discharge hole of the feeding screw is communicated with the main blanking channel; the bottom of the main discharging channel is provided with an inner cylinder and an outer cylinder, and the top of the outer cylinder sleeve is connected with the outside of the inner cylinder; one end of the two-way return air pipeline assembly is communicated with the interlayer, and the other end of the two-way return air pipeline assembly is connected and communicated with the dust remover; the emergency gas storage device comprises a gas storage container, a gas storage discharge pipeline and a gas storage inlet pipeline, wherein the gas storage container is communicated with the outer cylinder through the gas storage inlet pipeline, the gas storage container is communicated with a double-way return air pipeline assembly through the gas storage discharge pipeline, the gas storage inlet pipeline is provided with an inlet valve, and the gas storage discharge pipeline is provided with an exhaust control valve. The problems of low packaging speed and poor metering precision are solved, and the recycling of the recovered dust is realized.

Description

High-speed ton packagine machine that can accurate measurement dust

Technical Field

The utility model relates to the technical field of packaging equipment, in particular to a high-speed ton packaging machine capable of accurately measuring dust.

Background

The ton packaging machine is a packaging device for quantitatively packaging materials into flexible bags, and the weighing range of the packaged materials is 750 kg-1200 kg under the normal condition, and the packaging speed is 18-40 bags/hour.

In the prior art, ton packagine machine mainly includes parts such as feeding device, weighing machine constructs, bag clamping mechanism and conveyer, according to material characteristic difference, the structural style that each part of ton packagine machine adopted also is different. The feeding device mainly comprises four feeding modes: the gravity arc plate feeding method is suitable for feeding the granular materials; (2) The double-screw feeding is suitable for powder feeding, and has the defect of low feeding speed; (3) The gravity and screw feeding is also suitable for powder feeding, and the feeding speed and the metering precision can be considered; (4) The flexible spiral feeding is suitable for powder materials which are easy to adhere and harden. The weighing mechanism mainly comprises two weighing modes: (1) The net weight method is to weigh the materials according to a certain weight in advance and then fill the materials into a packaging bag, which is usually used for particle material packaging; (2) The tare weight method is to directly fill the materials into the packaging bags to finish weighing the materials, and is commonly used for powder packaging. Besides the components, the ton packaging machine is further provided with a dust remover and an air return pipeline for powder packaging, and the dust remover is used for independently collecting and then processing dust generated in the packaging bag through the air return pipeline.

In the related art, the feeding device comprises a vertical main discharging channel, a buffer hopper and a feeding screw, wherein a discharge hole of the buffer hopper is communicated with a feed hole of the feeding screw, the discharge hole of the feeding screw is communicated with the main discharging channel, and the buffer hopper is communicated with the main discharging channel through a side branch pipe; the device comprises a main discharging channel, a buffer hopper, a first dust removing pipeline, a second dust removing pipeline, a third dust removing pipeline, a fourth dust removing pipeline, a third butterfly valve, a dust removing system and a dust removing system, wherein the discharge port of the main discharging channel is provided with the three-position butterfly valve and the dust removing system; the first discharging pipe is used for coarse feeding, the spiral feeder is used for fine feeding, the third dust removing pipeline is used for reducing pressure in the ton bag in the coarse feeding stage, and the fourth dust removing pipeline is used for reducing pressure in the ton bag in the fine feeding stage.

The above-mentioned related art can reduce the influence of the internal atmospheric pressure of ton bag to powder measurement precision through the pressure reduction in the different dust removal pipelines to the ton bag in the feed process, but when the internal gas content of coarse feed stage powder increases suddenly in the twinkling of an eye, the unable in time of third dust removal pipeline reduces the internal atmospheric pressure of ton bag, leads to the ton bag to rise in the twinkling of an eye and cracks, perhaps when the flexible coupling of disconnection pipeline takes place to block up for a long time in the middle of the fourth dust removal pipeline, easily produces negative pressure in the ton bag, influences the powder measurement precision.

Disclosure of Invention

The utility model solves the technical problems that: the high-speed ton packaging machine overcomes the defects of the prior art, and solves the problem of poor metering precision caused by the fact that the ton bag is instantaneously cracked and the material flow is uneven in the bag in the fine feeding stage.

The technical scheme of the utility model is as follows:

a high-speed ton packaging machine capable of accurately measuring dust comprises a dust remover, a feeding device and a double-way return air pipeline assembly; the feeding device comprises a main blanking channel, a buffer hopper and a feeding screw, wherein a discharge hole of the buffer hopper is communicated with a feed hole of the feeding screw, a discharge hole of the feeding screw is communicated with one side of the main blanking channel, and a feed supplementing hole of the buffer hopper is communicated with the side wall of the main blanking channel through a side branch pipe; the bottom of the main blanking channel is provided with an inner cylinder and an outer cylinder, the outer cylinder is sleeved outside the inner cylinder, the top of the outer cylinder is connected to the outer side of the inner cylinder, and an interlayer is formed between the outer cylinder and the inner cylinder; the outer cylinder is connected with a container for containing powder; one end of the two-way return air pipeline assembly is communicated with the interlayer, and the other end of the two-way return air pipeline assembly is connected and communicated with the dust remover, so that powder entrained in the fluidization gas is recovered; the discharge port of the dust remover is connected with the material collecting port of the buffer hopper; the emergency gas storage device comprises a gas storage container, a gas storage discharge pipeline and a gas storage inlet pipeline, wherein the gas storage container is communicated with the outer cylinder through the gas storage inlet pipeline, the gas storage container is communicated with the double-way return air pipeline assembly through the gas storage discharge pipeline, the gas storage inlet pipeline is provided with an air inlet valve, so that when the pressure in the outer cylinder reaches the opening pressure of the air inlet valve, the air inlet valve is opened, when the pressure in the outer cylinder is smaller than the opening pressure of the air inlet valve, the air inlet valve is closed, and the gas storage discharge pipeline is provided with an exhaust control valve.

The air inlet valve is connected at the tail end of the air storage air inlet pipeline through the rotating shaft, the air inlet valve can rotate around the rotating shaft, torsion springs are sleeved on two sides of the rotating shaft, one end of each torsion spring is connected with the air inlet valve, the other end of each torsion spring is connected with the tail end of the air storage air inlet pipeline, and the air inlet valve is pressed on the tail end face of the air storage air inlet pipeline under the torsion action of the torsion springs.

The double-circuit return air pipeline assembly comprises a first main return air pipeline, a coarse return air pipeline, a second main return air pipeline and a fine return air pipeline, wherein the fine return air pipeline is connected with the coarse return air pipeline in parallel, one end of the fine return air pipeline connected in parallel with the coarse return air pipeline is connected with the second main return air pipeline, the other end of the fine return air pipeline connected in parallel with the coarse return air pipeline is connected with the first main return air pipeline, the second main return air pipeline is communicated with an interlayer, the first main return air pipeline is connected and communicated with a dust remover, the fine return air pipeline can be communicated with the atmosphere, and the gas storage discharge pipeline is communicated with the second main return air pipeline.

The coarse return air pipeline is provided with a second regulating valve and a fifth control valve, the fine return air pipeline is sequentially provided with a third regulating valve and a sixth control valve from top to bottom, the second regulating valve is used for controlling the flow of fluidizing gas in the coarse return air pipeline, the third regulating valve is used for controlling the flow of fluidizing gas in the fine return air pipeline, the fifth control valve is used for controlling the on and off of the coarse return air pipeline, and the sixth control valve is used for controlling the on and off of the fine return air pipeline; the part of the fine return air pipeline between the third regulating valve and the sixth control valve is connected with a self-cleaning air supplementing mechanism, and the self-cleaning air supplementing mechanism is used for communicating the atmosphere and providing clean air.

The self-cleaning air supplementing mechanism comprises an air supplementing outlet pipe, a filter and a back blowing pipeline, one end of the air supplementing outlet pipe is communicated with the fine air return pipeline, the other end of the air supplementing outlet pipe is communicated with the filter, the filter comprises a shell and a filter element, the filter element is detachably connected to the end part of the air supplementing outlet pipe, the shell is sleeved outside the filter element, and the shell and the western air return pipeline are connected with each other to be connected with an air supplementing control valve; one end of the back-blowing pipeline extends into the filter element through the air supplementing outlet pipe, and the other end of the back-blowing pipeline is connected with a back-blowing valve.

The bottom of the shell is provided with a waste discharge port, the waste discharge port is positioned below the filter element, and the waste discharge port is detachably connected with a waste discharge cover; the top of the shell is provided with a filter element replacement door, and the filter element replacement door is connected with the shell through a rotating shaft and is pressed on the shell through a lock catch; the air supplementing outlet pipe is connected with a flow rate sensor.

The double-way return air pipeline assembly further comprises a cabin top return air pipeline, one end of the cabin top return air pipeline is connected with a cabin top return air inlet of the buffer hopper, the other end of the cabin top return air pipeline is connected and communicated with the side wall of the first main return air pipeline, a vertical section of the cabin top return air pipeline is provided with a fourth regulating valve and a seventh control valve, the vertical section between the fourth regulating valve and the seventh control valve is disconnected from the middle of the vertical section along two sides, and the disconnected part is sleeved with a ventilation flexible connection for communicating the atmosphere.

The feeding device further comprises a flow assisting pipeline, the flow assisting pipeline comprises a main flow assisting pipeline and a plurality of branch pipelines which are separated from the main flow assisting pipeline, one part of the branch pipelines are communicated with the main discharging channel along different positions on the axis of the main discharging channel, the other part of the branch pipelines are communicated with the bin wall of the bin, the bin is communicated with the top of the main discharging channel, and the main flow assisting pipeline is connected with an air source.

The main auxiliary flow pipeline is provided with a pressure regulating valve for regulating pipeline pressure, and each branch pipeline is provided with a one-way valve and a flow regulating ball valve for preventing materials from entering the auxiliary flow pipeline and regulating fluidization air flow.

The main blanking channel is sequentially provided with a first adjusting valve, a first control valve and a second control valve from top to bottom, the first adjusting valve and the first control valve are respectively positioned at the communication positions of the side branch pipe, the feeding screw and the main blanking channel, and the second control valve is positioned below the communication position of the feeding screw and the main blanking channel.

Along the moving direction of the powder in the feeding screw, the outer diameter of the screw blade, which is opposite to the feeding opening of the buffer hopper, of the feeding screw is gradually increased, and the outer circle connecting line of the screw blade at the position forms an inclination angle alpha with a horizontal line, wherein the alpha is 5-7 degrees.

The bag blowing assembly comprises a bag blowing pipeline, a pressure regulating valve, a flow regulating ball valve and a fourth control valve which are arranged on the bag blowing pipeline, and an outlet of the bag blowing pipeline is connected and communicated with an outer barrel of the main discharging channel; and the fourth control valve controls the bag blowing gas to enter from the outer barrel of the main discharging channel and enter into the container through the interlayer channel.

The automatic powder filling machine is characterized in that a weighing module is arranged below the main discharging channel, a conveyor is arranged above the weighing module, the conveyor comprises a support and a conveyor belt, a weighing frame is arranged on the support, the weighing frame is connected with a bag clamping mechanism, the lower end of the outer cylinder is in flexible connection with the upper end of a cylinder body of the bag clamping mechanism, and the bag clamping mechanism is used for being connected with a container for containing powder.

The lower part of the inner cylinder body is longer than the outer cylinder body, and the inner cylinder is inserted into the cylinder body of the bag clamping mechanism.

In summary, the present application at least includes the following beneficial technical effects:

1. according to the utility model, the fluidization gas is introduced into the powder in the discharging channel and the powder in the storage bin, so that the powder flowability is improved, the coarse feeding discharging speed is accelerated, and the overall packaging speed is improved from 25 bags/hour to about 60 bags/hour;

2. the self-cleaning air supplementing mechanism is arranged on the fine air return pipeline, so that the filter element is prevented from being blocked due to long-time use, and air cannot be supplemented into the fine air return pipeline in the fine feeding stage, so that negative pressure is generated in the packaging bag, and weighing precision is influenced;

3. according to the utility model, the emergency gas storage device is arranged between the main discharging channel and the double-channel return air pipeline assembly, when the instant pressure of the fluidizing gas in the ton bag is larger than the cracking pressure of the ton bag, the gas in the ton bag can be rapidly discharged in time and stored in the emergency gas storage device, and the stored gas is discharged again in the fine feeding stage, so that the ton bag is prevented from cracking, gas leakage is prevented, and site operators are protected.

4. The spiral blade excircle connecting line at the discharging outlet part of the buffering storage bin forms a certain inclination angle with the horizontal line, so that the discharging outlet is effectively prevented from being arched, the filling coefficient of a spiral is increased, the spiral outlet is designed into a grid structure, the discharging material flow is ensured to be uniform, and the weighing precision is improved.

Drawings

FIG. 1 is a front view of a high-speed ton packaging machine capable of accurately metering dust according to an embodiment of the present utility model;

FIG. 2 is a diagram of the positional relationship of a bag-in-drum assembly and a two-way return air line assembly provided in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic view of a two-way return line assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic illustration of the relative positions of an emergency air reservoir, self-cleaning air make-up mechanism and two-way return air line assembly for emergency venting of powder in accordance with an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of an emergency gas reservoir according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a self-cleaning air-make-up mechanism provided by an embodiment of the present utility model;

figure 7 is a cross-sectional view of a screw feeder according to an embodiment of the present utility model.

The reference numerals in the drawings are:

1. a drum bag assembly;

2. a two-way return air line assembly; 21. the first main return air pipeline, 22, the coarse return air pipeline, 23, the second main return air pipeline, 24, the fine return air pipeline, 25 and the cabin top return air pipeline;

3. a dust remover;

4. a feeding device; 41. main discharging channel, 42, buffer hopper, 43, feeding screw, 44 and auxiliary flow pipeline

5. A scale rack; 6. a weighing module; 7. a conveyor; 8. a bag clamping mechanism;

9. an emergency gas reservoir; 91. a gas storage container; 92. an exhaust control valve; 93. a gas storage discharge line; 94. a gas storage air inlet pipeline; 95. an intake valve; 96. a torsion spring; 97. a rotating shaft;

10. a self-cleaning air supplementing mechanism; 101. the device comprises a flow rate sensor 102, a gas supplementing outlet pipe 103, a filter 104, a gas supplementing control valve 105, a back flushing valve 106 and a back flushing pipeline; 1031. housing 1032, filter element, 1033, waste cap, 1034, filter element replacing door.

Detailed Description

A specific embodiment of a high-speed ton packaging machine capable of accurately metering dust according to the present utility model will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, a high-speed ton packaging machine capable of accurately measuring dust comprises a drum bag assembly 1, a double-way return air pipeline assembly 2, a dust remover 3, a feeding device 4, a weighing frame 5, a weighing module 6, a conveyor 7 and a bag clamping mechanism 8.

The drum bag assembly 1 is arranged below the side of the feeding device 4, the two-way return air pipeline assembly 2 is arranged on the side surface of the feeding device 4, and the dust remover 3 is arranged right above the feeding device 4; the weighing module 6 is located under the conveyor 7, the conveyor 7 is arranged on the weighing module 6, the conveyor 7 comprises a support and a conveyor belt, the conveyor belt is rotationally connected to the support and used for driving a container for containing powder to move, the weighing frame 5 is connected to the support, the bag clamping mechanism 8 is fixed under the weighing frame 5, and the bag clamping mechanism 8 is used for connecting the container for containing powder.

The drum bag assembly 1 is used for blowing empty ton bags before blanking, so that the ton bags are convenient to be filled with materials; the two-way return air pipeline assembly 2 is used for controlling and regulating the discharged bag blowing gas and the fluidization gas in the process of filling the ton bags; the dust remover 3 discharges the bubbling gas and the fluidization gas and simultaneously filters and recovers dust mixed in the gas; the feeding device 4 is used for controlling and adjusting the blanking speed; the scale frame 5 is used for supporting the bag clamping mechanism 8; the weighing module 6 is used for weighing the filling materials; the conveyor 7 is used for outputting the packaged materials; the bag clamping mechanism 8 is used for clamping the mouth of the ton bag.

The feeding device 4 comprises a main blanking channel 41, a buffer hopper 42, a feeding screw 43 and a flow assisting pipeline 44, wherein the feeding screw 43 is horizontally arranged below the buffer hopper 42, a feeding hole of the feeding screw 43 is connected and communicated with a discharging hole of the buffer hopper 42, the discharging hole of the feeding screw 43 is connected and communicated with the side wall of the main blanking channel 41, a feeding hole, a material collecting hole and a bin top air return opening are respectively arranged on a top cover of the buffer hopper 42, and the feeding hole of the buffer hopper 42 is connected and communicated with the side wall of the main blanking channel 41 through side branch pipes. The main blanking channel 41 is sequentially provided with a first adjusting valve, a first control valve and a second control valve from top to bottom, the first adjusting valve and the first control valve are positioned above the feeding screw communication position, the second control valve is positioned below the feeding screw communication position, part of the main blanking channel 41 under the second control valve consists of an inner cylinder and an outer cylinder which are mutually sleeved, the outer cylinder is sleeved outside the inner cylinder, the top of the outer cylinder is connected with the outer wall of the inner cylinder, the inner cylinder is communicated with the main blanking channel 41 above the second control valve, the lower part of the inner cylinder is longer than the outer cylinder and is inserted into the inner cylinder of the bag clamping mechanism 8, the lower end of the outer cylinder and the upper end of the cylinder of the bag clamping mechanism 8 are in flexible connection, and the inner cylinder, the cylinder of the bag clamping mechanism 8 and the flexible connection form an interlayer channel.

The auxiliary flow pipeline 44 comprises a main auxiliary flow pipeline and a plurality of branch pipelines which are separated from the main auxiliary flow pipeline, one part of branch pipelines are communicated with the pipe wall of the main discharging channel at different positions on the axis of the main discharging channel, the other part of branch pipelines are communicated with the wall of a storage bin for storing materials, the outlet of the storage bin is communicated with the top of the main discharging channel, and the main auxiliary flow pipeline is connected with an air source; the main flow assisting pipeline is provided with a pressure regulating valve for regulating pipeline pressure, and each branch pipeline is provided with a one-way valve and a flow regulating ball valve for preventing materials from entering the flow assisting pipeline and regulating fluidization air flow.

The main discharging channel 41 is used for feeding materials roughly, and simultaneously, the buffer hopper 42 is supplemented with materials; the feeding screw 43 is used for fine feeding of materials; the buffer hopper 42 is used for providing materials for the feeding screw 43; the flow-assist conduit 44 is used to fluidize the packaged material to increase the rate of discharge while preventing the material from arching in the bin or conduit.

According to the scheme, the first adjusting valve and the first control valve are replaced by the first adjusting control valve, so that the material flow can be accurately controlled, the coarse feeding amount is further increased, and the discharging speed is secondarily improved.

The discharge port of the dust remover 3 is connected with the material collecting port of the buffer hopper 42 through a third control valve, and the third control valve controls the powder collected by the dust remover 3 to be discharged into the buffer hopper 42.

The bag blowing assembly 1 comprises a bag blowing pipeline, a pressure regulating valve, a flow regulating ball valve and a fourth control valve which are arranged on the bag blowing pipeline, and an outlet of the bag blowing pipeline is connected and communicated with an outer barrel of the main blanking channel 41. The fourth control valve controls the bag blowing gas to enter from the outer barrel of the main discharging channel 41 and enter into the ton bag through the interlayer channel; the pressure regulating valve is used for regulating the pressure of the bag blowing gas; the flow regulating ball valve is used for regulating the air quantity of the bag blowing air.

The working medium of the flow assisting pipe 44 and the drum bag assembly 1 can be compressed air or inert gas, and when the inert gas is used, the material package in the dust explosion-proof environment can be satisfied.

As shown in fig. 3, the two-way return air pipeline assembly 2 comprises a first main return air pipeline 21, a coarse return air pipeline 22, a second main return air pipeline 23, a fine return air pipeline 24 and a cabin top return air pipeline 25, wherein the coarse return air pipeline 22 is adjacent to the main discharging channel 41 and is vertically arranged in parallel, the upper end of the coarse return air pipeline 22 is connected and communicated with one end of the first main return air pipeline 21, and the other end of the first main return air pipeline 21 is connected and communicated with the dust remover; the lower end of the coarse air return pipeline 22 is connected and communicated with one end of a second main air return pipeline 23, and the other end of the second main air return pipeline 23 is connected and communicated with the outer barrel of the main blanking channel 41; the fine return air pipeline 24 is adjacent to the coarse return air pipeline 22 and is vertically and parallelly arranged, the upper end of the fine return air pipeline 24 is connected and communicated with the side wall of the upper part of the coarse return air pipeline 22 through an upper inclined pipe, and the lower end of the fine return air pipeline 24 is connected and communicated with the side wall of the lower part of the coarse return air pipeline 22 through a lower inclined pipe; a second regulating valve and a fifth control valve are arranged on the thick air return pipeline 22 between the upper inclined pipe connection position and the lower inclined pipe connection position, and a third regulating valve and a sixth control valve are sequentially arranged on the thin air return pipeline 24 from top to bottom; the second regulating valve is used for controlling the flow of the fluidization gas in the coarse return air pipeline 22, the third regulating valve is used for controlling the flow of the fluidization gas in the fine return air pipeline 24, the fifth regulating valve is used for controlling the on and off of the coarse return air pipeline 22, and the sixth regulating valve is used for controlling the on and off of the fine return air pipeline 24; the part of the fine return air pipeline 24 between the third regulating valve and the sixth control valve is connected with a self-cleaning air supplementing mechanism 10, and the self-cleaning air supplementing mechanism 10 is used for communicating with the atmosphere and providing clean air; one end of the cabin top air return pipeline 25 is connected with a cabin top air return port of the buffer hopper 42, the other end of the cabin top air return pipeline is connected and communicated with the side wall of the first main air return pipeline 21, a fourth regulating valve and a seventh control valve are arranged on the vertical section of the cabin top air return pipeline 25, the fourth regulating valve is used for controlling the flow rate of the fluidizing air in the cabin top air return pipeline 25, the seventh control valve is used for controlling the on and off of the cabin top air return pipeline 25, the vertical section between the fourth regulating valve and the seventh control valve is disconnected from the middle along two sides, and the ventilation flexible connection is sleeved on the disconnected part of the vertical section of the cabin top air return pipeline 25 and used for communicating the atmosphere.

The first main return line 21 is provided with a purge port in the axial direction for cleaning dust in the line.

In the coarse feeding stage, the bag blowing gas and the fluidizing gas in the ton bag are rapidly discharged through the interlayer channel through the coarse return air pipeline 22 to ensure the discharging speed, in the fine feeding stage, the bag blowing gas and the fluidizing gas in the ton bag are discharged into the outside atmosphere through the interlayer channel through the fine return air pipeline 24, and the broken part of the fine return air pipeline 24 is communicated with the atmosphere to balance the pressure difference between the inside and the outside of the pipeline and ensure the weighing precision of the materials.

As shown in fig. 4, 5 and 6, the self-cleaning air supplementing mechanism 10 includes a flow rate sensor 101, an air supplementing outlet pipe 102, a filter 103, an air supplementing control valve 104, a back-flushing valve 105 and a back-flushing pipeline 106, one end of the air supplementing outlet pipe 102 is connected and communicated with a fine return air pipeline 24 between a third regulating valve and a sixth regulating valve, the other end of the air supplementing outlet pipe extends into one side of a shell 1031 of the filter 103, the other side of the shell 1031 is connected with the air supplementing control valve 104 through a pipeline, the flow rate sensor 101 is communicated with the side wall of the air supplementing outlet pipe 102, a filter element 1032 is sleeved at the tail end of the other end of the air supplementing outlet pipe 102 and is in expansion connection, one end of the back-flushing pipeline 106 extends into the filter element 1032 through the air supplementing outlet pipe 102, the other end of the back-flushing valve 105 is connected with a back-flushing valve 1033, the waste discharging cover 1033 is compressed on a waste discharging port of the shell 1031 through a butterfly nut, the filter element replacing door 1034 is connected with the shell 1031 through a rotating shaft, and can be compressed on the shell 1031 through a lock catch.

In the fine feeding stage, the air supplementing control valve 104 is opened, external air enters the shell 1031 through the air supplementing control valve 104 and is filtered by the filter element 1032, then enters the ton bag through the air supplementing outlet pipe 102 and the fine return air pipeline 24, the flow rate sensor 101 is used for detecting the flow rate of the supplemented external air, when the filter element 1032 is blocked, the flow rate sensor 101 alarms, the controller controls the air supplementing control valve 104 to be closed, the back blowing valve 105 is opened, and the back blowing air enters the filter element 1032 through the back blowing pipeline 106 to carry out back blowing cleaning on the filter element 1032.

The emergency gas storage 9 comprises a gas storage container 91, two ends of a gas storage discharge pipeline 93 are respectively communicated with a second main return air pipeline 25 and the gas storage container 91, an exhaust control valve 92 is arranged on the gas storage discharge pipeline 93, one end of a gas storage inlet pipeline 94 is communicated with an outer cylinder body of a main blanking channel 41, the other end of the gas storage inlet pipeline stretches into the gas storage container 91, an air inlet valve 95 is arranged at the tail end of the gas storage inlet pipeline 94, the air inlet valve 95 is connected at the tail end of the gas storage inlet pipeline 94 through a rotating shaft 97, the air inlet valve 95 can rotate around the rotating shaft 97, torsion springs 96 are sleeved on two sides of the rotating shaft, one end of each torsion spring 96 is connected with the air inlet valve 95, the other end of each torsion spring 96 is connected with the tail end of the gas storage inlet pipeline 94, and the air inlet valve 95 is tightly pressed on the tail end face of the gas storage inlet pipeline 96 with a certain pressing force under the torsion of the torsion springs 96.

When the initial feeding is carried out, if more fluidization gas exists in the powder, when the instant pressure of the fluidization gas in the ton bag is larger than the expansion pressure of the ton bag, the air inlet valve 95 can be opened under the action of the fluidization gas pressure, part of the fluidization gas is released into the air storage container 91, meanwhile, the pressure of the fluidization gas in the ton bag is rapidly reduced, the ton bag is prevented from being expanded and cracked, meanwhile, as the fluidization gas is mostly inert gas, the fluidization gas stored in the air storage container 91 can be fed in a fine feeding stage, the air outlet control valve 92 is opened, the fluidization gas is fed into the ton bag or is discharged through the fine air return pipeline 24, the fluidization gas is prevented from leaking into indoor air, and the choking of workers in site operation is avoided.

As shown in fig. 7, the outer circle connecting line of the spiral blade at the discharging outlet of the buffer hopper forms a certain inclination angle alpha with the horizontal line, and the alpha is limited to 5-7 degrees, so that the discharging outlet is effectively prevented from being arched, the filling coefficient of the spiral is increased, the uniform filling in the spiral pipe is ensured, the spiral outlet is designed into a grid-shaped structure, the uniform material flow during discharging is ensured, and the weighing precision is improved.

While the utility model has been described in terms of the preferred embodiment, it is not intended to limit the utility model, but it will be apparent to those skilled in the art that variations and modifications can be made without departing from the spirit and scope of the utility model, and therefore the scope of the utility model is defined in the appended claims.

Claims (10)

1. A high-speed ton packagine machine that can accurate measurement dust, its characterized in that: the device comprises a dust remover (3), a feeding device (4), a double-way return air pipeline assembly (2) and an emergency air receiver (9);

the feeding device (4) comprises a main blanking channel (41), a buffer hopper (42) and a feeding screw (43), wherein a discharge hole of the buffer hopper (42) is communicated with a feed hole of the feeding screw (43), a discharge hole of the feeding screw (43) is communicated with the main blanking channel (41), and the buffer hopper (42) is communicated with the main blanking channel (41) through a side branch pipe;

an inner cylinder and an outer cylinder are arranged at the bottom of the main blanking channel (41), the top of the outer cylinder is connected to the outer side of the inner cylinder, and an interlayer is formed between the outer cylinder and the inner cylinder; the outer cylinder is connected with a container for containing powder;

one end of the two-way return air pipeline assembly (2) is communicated with the interlayer, and the other end of the two-way return air pipeline assembly is connected and communicated with the dust remover (3); the discharge port of the dust remover (3) is connected with the collection port of the buffer storage hopper (42);

emergent gas storage ware (9) are including gas storage container (91), gas storage discharge pipeline (93), gas storage admission line (94), gas storage container (91) are in the urceolus through gas storage admission line (94) intercommunication, gas storage container (91) are in double-circuit return air pipeline subassembly through gas storage discharge pipeline (93) intercommunication, be provided with on gas storage admission line (94) intake valve (95) to when making the urceolus internal pressure reach the opening pressure of intake valve (95), intake valve (95) are opened, when the pressure in the urceolus is less than the opening pressure of intake valve (95), intake valve (95) are closed, are provided with exhaust control valve (92) on gas storage discharge pipeline (93).

2. The high-speed ton packaging machine capable of accurately metering dust according to claim 1, wherein: the air inlet valve (95) is connected to the tail end of the air storage air inlet pipeline (94) through a rotating shaft (97), the air inlet valve (95) can rotate around the rotating shaft (97), a torsion spring (96) is sleeved on two sides of the rotating shaft (97), one end of the torsion spring (96) is connected with the air inlet valve (95), the other end of the torsion spring is connected with the tail end of the air storage air inlet pipeline (94), and the air inlet valve (95) is pressed on the tail end face of the air storage air inlet pipeline (94) under the torsion action of the torsion spring (96).

3. The high-speed ton packaging machine capable of accurately metering dust according to claim 1, wherein: the double-path air return pipeline assembly (2) comprises a first main air return pipeline (21), a coarse air return pipeline (22), a second main air return pipeline (23), a fine air return pipeline (24) and a cabin top air return pipeline (25), wherein the fine air return pipeline (24) is connected with the coarse air return pipeline (22) in parallel, one end of the fine air return pipeline (24) and one end of the coarse air return pipeline (22) which are connected in parallel are connected with the second main air return pipeline (23), the other end of the fine air return pipeline is connected with the first main air return pipeline (21), the second main air return pipeline (23) is communicated with an interlayer, the first main air return pipeline (21) is connected and communicated with the dust remover (3), one end of the fine air return pipeline (24) can be communicated with the atmosphere, and one end of the cabin top air return pipeline (25) is connected with the cabin top air return port of the cache hopper (42), and the other end of the fine air return pipeline is connected and communicated with the side wall of the first main air return pipeline (21), and the cabin top air return pipeline (25) is communicated with the atmosphere; the air storage discharge pipeline (93) is communicated with the second main return pipeline (23).

4. A high-speed ton packaging machine capable of accurately metering dust according to claim 3, wherein: the coarse return air pipeline (22) is provided with a second regulating valve and a fifth control valve, the fine return air pipeline (24) is sequentially provided with a third regulating valve and a sixth control valve from top to bottom, the second regulating valve is used for controlling the flow of the liquefied gas in the coarse return air pipeline (22), the third regulating valve is used for controlling the flow of the liquefied gas in the fine return air pipeline (24), the fifth control valve is used for controlling the on and off of the coarse return air pipeline (22), and the sixth control valve is used for controlling the on and off of the fine return air pipeline (24); the part of the fine return air pipeline (24) between the third regulating valve and the sixth control valve is connected with a self-cleaning air supplementing mechanism (10), and the self-cleaning air supplementing mechanism (10) is used for communicating with the atmosphere and providing clean air.

5. The high-speed ton packaging machine capable of accurately metering dust according to claim 4, wherein: the self-cleaning air supplementing mechanism (10) comprises an air supplementing outlet pipe (102), a filter (103) and a back blowing pipeline (106), one end of the air supplementing outlet pipe (102) is communicated with a fine air return pipeline, the other end of the air supplementing outlet pipe is communicated with the filter (103), the filter (103) comprises a shell (1031) and a filter element (1032), the filter element (1032) is detachably connected to the end part of the air supplementing outlet pipe (102), the shell (1031) is sleeved outside the filter element (1032), and the shell (1031) and the western air return pipeline are connected with each other to be connected with an air supplementing control valve (104); one end of the back-blowing pipeline (106) extends into the filter element (1032) through the air supplementing outlet pipe (102), and the other end is connected with the back-blowing valve (105).

6. The high-speed ton packaging machine capable of accurately metering dust according to claim 5, wherein: the bottom of the shell (1031) is provided with a waste discharge port, the waste discharge port is positioned below the filter element (1032), and the waste discharge port is detachably connected with a waste discharge cover (1033); the top of the shell (1031) is provided with a filter element (1032) replacement door, the filter element (1032) replacement door is connected with the shell (1031) through a rotating shaft (97) and is pressed on the shell (1031) through a lock catch;

the air supplementing outlet pipe (102) is connected with a flow rate sensor (101).

7. The high-speed ton packaging machine capable of accurately metering dust according to claim 1, wherein: along the moving direction of the powder in the feeding screw (43), the outer diameter of the screw blade at the position, which is opposite to the feed opening of the buffer hopper (42), of the feeding screw (43) is gradually increased, and the outer circle connecting line of the screw blade at the position and the horizontal line form an inclined angle alpha, wherein the inclined angle alpha is 5-7 degrees.

8. The high-speed ton packaging machine capable of accurately metering dust according to claim 1, wherein: the main discharging channel (41) is connected with a bag-blowing assembly (1), the bag-blowing assembly (1) comprises a bag-blowing pipeline and a fourth control valve arranged on the bag-blowing pipeline, and an outlet of the bag-blowing pipeline is connected and communicated with an outer barrel of the main discharging channel (41); the fourth control valve controls the bag blowing gas to enter from the outer barrel of the main discharging channel (41) and enter into the container through the interlayer channel;

the feeding device (4) further comprises a flow assisting pipeline (44), the flow assisting pipeline (44) comprises a main flow assisting pipeline (44) and a plurality of branch pipelines which are separated from the main flow assisting pipeline (44), one part of the branch pipelines are communicated with the main discharging channel (41) along different positions on the axis of the main discharging channel, the other part of the branch pipelines are communicated with the bin wall of the bin, the bin is communicated with the top of the main discharging channel (41), and the main flow assisting pipeline (44) is connected with an air source.

9. The high-speed ton packaging machine capable of accurately metering dust according to claim 1, wherein: the automatic powder filling machine is characterized in that a weighing module (6) is arranged below the main discharging channel (41), a conveyor (7) is arranged above the weighing module (6), the conveyor (7) comprises a support and a conveyor belt, a weighing frame is arranged on the support, the weighing frame is connected with a bag clamping mechanism (8), the lower end of the outer cylinder is in flexible connection with the upper end of a cylinder body of the bag clamping mechanism (8), and the bag clamping mechanism (8) is used for being connected with a container for containing powder.

10. The high-speed ton packaging machine capable of accurately metering dust according to claim 9, wherein: the lower part of the inner cylinder body is longer than the outer cylinder, and the inner cylinder is inserted into the cylinder body of the bag clamping mechanism (8).