CN114147875A

CN114147875A - Tubular product raw materials compounding system

Info

Publication number: CN114147875A
Application number: CN202111442265.3A
Authority: CN
Inventors: 康吉辉
Original assignee: Chongqing Youwei Plastic Co ltd
Current assignee: Chongqing Youwei Plastic Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-03-08

Abstract

The invention relates to the technical field of pipe processing, and particularly discloses a pipe raw material mixing system which comprises a PLC (programmable logic controller), an auxiliary material mixing module and a raw material multi-stage mixing module, wherein the auxiliary material mixing module comprises an auxiliary material mixing device and a raw material storage device, and the auxiliary material mixing device comprises a stirrer and a plurality of auxiliary material bins; the discharge port of each auxiliary material bin is communicated with the feed port of the stirrer, the discharge port of the stirrer is communicated with the feed port of the raw material storage device, and the discharge port of the raw material storage device is communicated with the raw material multistage mixing module; and the two sides of each auxiliary material bin are respectively provided with an automatic weighing scale, and the PLC is used for controlling the automatic weighing scales to complete the weighing work of the auxiliary materials. By adopting the technical scheme provided by the invention, the problems that various auxiliary materials cannot be directly pre-mixed in the prior art, the auxiliary materials are easily mixed unevenly by manual mixing, and the mixing efficiency is low can be solved. The invention is mainly used for mixing the raw materials of the pipe.

Description

Tubular product raw materials compounding system

Technical Field

The invention relates to the technical field of pipe processing, in particular to a pipe raw material mixing system.

Background

The pipe is the material used for manufacturing the pipe fitting, different pipe fittings need different pipe fittings, and the quality of the pipe fitting is directly determined. The plastic pipe is used as an important component of chemical building materials, is accepted by wide users due to superior performances of sanitation, environmental protection, low consumption and the like, and the pipe fittings made of the plastic pipe mainly comprise a UPVC drain pipe, a UPVC water supply pipe, an aluminum-plastic composite pipe and a Polyethylene (PE) water supply pipe. The production line of the pipe comprises a raw material mixing system, an air conveying system, an extrusion device, a shaping and cooling system, a traction cutting system and the like, so that the main material and the auxiliary material are mixed in the first step of pipe production to form uniform mixed raw materials for subsequent processing. The production raw materials of the pipe are often manually stirred in the early days, and the raw materials are easily and unevenly mixed by manual mixing, so that the pipe is locally decomposed, and surface color points are formed.

In order to overcome the problem that manual mixing easily leads to mixing unevenness, the mechanical stirring of the mixing device for realizing the pipe raw materials appears on the market, so that the uniformity of raw material mixing is improved. The existing plastic pipe raw material mixing system is characterized in that a plurality of auxiliary materials such as PVC (polyvinyl chloride) stabilizers, plasticizers, antioxidants and the like and main materials are added into a high-speed mixer according to a certain proportion, the materials are heated to a set process temperature through self-friction of the materials and machinery, and then the materials are cooled through a cold mixer, so that the uniformly stirred mixed raw materials can be added into a hopper of an extruder for subsequent processing. However, the traditional mixing device needs operators to continuously input quantitative raw materials according to a certain proportion, manual feeding is low in feeding efficiency compared with mechanical automatic feeding, and the operators can inevitably generate errors when inputting the raw materials, so that the input proportion of the raw materials is uncertain, and the quality of the pipe is reduced.

In view of the above situation, the utility model with the publication number of CN210590004U discloses a mixing system for PE pipe production, which comprises a mixing box, wherein a stirring shaft is arranged inside the mixing box, and one end of the stirring shaft is connected with a driving motor; a material storage barrel is arranged above the mixing box and is communicated with the mixing box through a communicating pipe; the inside of storage section of thick bamboo sets up division board and blanking column, and the silo has seted up in the outside of blanking column, and the one end and the fixed disk of blanking column link to each other, and fixed subassembly is installed in the outside of fixed disk. This compounding system makes the vertical up of not unidimensional feed chute through rotatory fixed disk and unloading post, utilizes the unloading speed of two storage barrels of the proportional control of the groove width size of two feed chutes, makes it send the raw materials into the compounding incasement portion according to certain proportion, avoids operating personnel to constantly pack, makes the unloading proportion more accurate simultaneously, improves the quality of PE tubular product. But this compounding system can only control the unloading proportion of the raw materials and the auxiliary material in the different storage barrels, and can not directly carry out the premix to multiple auxiliary material before auxiliary material and raw materials unloading mix, consequently need manually carry out the compounding to multiple auxiliary material before adding multiple auxiliary material in the storage barrel of this compounding system, artifical compounding leads to the auxiliary material to mix inequality easily, and the compounding is inefficient.

Disclosure of Invention

The invention aims to provide a pipe raw material mixing system to solve the problems that various auxiliary materials cannot be directly pre-mixed in the prior art, the auxiliary materials are easily mixed unevenly through manual mixing, and the mixing efficiency is low.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a pipe raw material mixing system comprises a PLC, an auxiliary material mixing module and a raw material multi-stage mixing module, wherein the auxiliary material mixing module comprises an auxiliary material mixing device and a raw material storage device, the auxiliary material mixing device comprises a stirrer and a plurality of auxiliary material bins, and the raw material storage device comprises an auxiliary material tank and a main material tank; the discharge port of each auxiliary material bin is communicated with the feed port of the stirrer, the discharge port of the stirrer is communicated with the feed port of the auxiliary material tank, and the discharge port of the raw material storage device is communicated with the raw material multistage mixing module; and the two sides of each auxiliary material bin are respectively provided with an automatic weighing scale, and the PLC is used for controlling the automatic weighing scales to complete the weighing operation of the auxiliary materials.

Technical principle and beneficial effect compared with the prior art:

the technical scheme is adopted to carry out mixing operation on the raw materials of the pipe, firstly, a plurality of auxiliary materials are mixed in advance through the auxiliary material mixing device, namely, various auxiliary materials are respectively added into each auxiliary material bin through a feeding hole, different auxiliary materials in each auxiliary material bin are respectively added into the stirrer after being respectively metered by the automatic metering scale controlled by the PLC, the various auxiliary materials are mixed and stirred by the stirrer, and the auxiliary materials are discharged from a discharge hole of the stirrer after the stirrer finishes the mixing and stirring operation on the auxiliary materials; and then the main material and the auxiliary material after stirring are stored by the raw material storage device, namely the main material is added into the main material tank through the feed inlet, the auxiliary material after stirring is added into the auxiliary material tank through the feed inlet, and thus, the work of the auxiliary material mixing module is finished. When the raw material multistage mixing module works, the main materials and the auxiliary materials stored in the raw material storage device are conveyed to the raw material multistage mixing module, and mixing operation of the main materials and the auxiliary materials is carried out.

This tubular product raw materials compounding system compares in prior art:

1. the auxiliary material mixing device is arranged to pre-mix various auxiliary materials, and then the main material and the premixed auxiliary materials are mixed, so that the mixing time of the main material and the auxiliary materials can be shortened, the working efficiency of the multistage raw material mixing module is improved, and the overall mixing uniformity of the raw materials can be improved by adding one more auxiliary material mixing process;

2. before the auxiliary materials are premixed, automatic weighing scales are arranged on two sides of each auxiliary material bin to measure various auxiliary materials, so that the addition of each auxiliary material is accurately controlled, the proportion among the auxiliary materials strictly conforms to the production requirement of the pipe, and the quality of the pipe processed subsequently meets the requirement and is kept stable.

Further, a first control valve is arranged at the discharge port of the main material tank, a second control valve is arranged at the discharge port of the auxiliary material tank, and the first control valve and the second control valve are both electrically connected with the PLC; the raw material multistage mixing module comprises a weighing hopper, a mixing mechanism and a temporary storage tank which are sequentially arranged, and weight sensors electrically connected with the PLC are arranged on two sides of the weighing hopper; the discharge ports of the main material tank and the auxiliary material tank are communicated with the feed port of the weighing hopper.

Has the advantages that: by adopting the scheme, the PLC can control the first control valve at the discharge port of the main material tank and the second control valve at the discharge port of the auxiliary material tank to be opened respectively, so that the main material and the auxiliary material enter the weighing hopper respectively, the weight sensors arranged at two sides of the weighing hopper continuously sense the weight of the material in the weighing hopper in the process, and the PLC controls the corresponding valves to be closed when the weight of the main material or the auxiliary material reaches a preset value; the material weight variation in the weighing hopper during the opening period of each control valve is the material addition amount in the material tank corresponding to the control valve, so that the main material and the auxiliary material can be sequentially weighed in the same weighing device, namely the weighing hopper, and the situation that the ratio of the main material to the auxiliary material is not in accordance with the production requirement due to the accuracy errors existing between different weighing devices when the main material and the auxiliary material are weighed by using different weighing devices is avoided.

Further, the material mixing mechanism comprises a hot mixer and a cold mixer, a third control valve is arranged between the weighing hopper and the hot mixer, a hot mixing discharge valve is arranged between the hot mixer and the cold mixer, a cold mixing discharge valve is arranged between the cold mixer and the temporary storage tank, and the third control valve, the hot mixing discharge valve and the cold mixing discharge valve are all electrically connected with the PLC.

Has the advantages that: by adopting the scheme, when the weighing hopper finishes the sequential weighing of the main materials and the auxiliary materials, namely the weight variation in the weighing hopper reaches a preset value, the PLC controls the third valve between the weighing hopper and the hot mixer to be opened, so that the main materials and the auxiliary materials meeting the production proportioning requirements enter the hot mixer together for high-temperature mixing operation; after the work of the hot mixer is finished, the PLC controls a hot mixing discharge valve between the hot mixer and the cold mixer to be opened, so that the raw materials after the hot mixing are fed into the cold mixer, and the cold mixer performs low-temperature mixing operation on the raw materials; after the cold mixer finishes working, the PLC controls a cold mixing discharge valve between the cold mixer and the temporary storage tank to be opened, so that the raw materials after cold mixing finish enter the temporary storage tank for temporary storage.

The hot mixer carries out high temperature compounding to the raw materials for main material and auxiliary material obtain intensive mixing under high temperature environment, and rethread cold mixer cools down the high temperature raw materials and handles, avoids the temperature of raw materials to continuously rise and leads to the performance of raw materials to be destroyed, thereby guarantees that the tubular product quality of production accords with the expectation. The hot mixer and the cold mixer are arranged to carry out multi-stage mixing on the raw materials, so that the raw materials can be mixed more uniformly, the production requirement of the pipe is met, and the quality of the produced pipe is improved.

Further, still include mixture storage module, mixture storage module includes mixture storage mechanism, and mixture storage mechanism includes buffer tank and head tank, the feed inlet of buffer tank and the discharge gate intercommunication of temporary storage tank, the discharge gate of buffer tank and the feed inlet intercommunication of head tank, the head tank is connected to extrusion equipment's feed jar through the discharging pipe.

Has the advantages that: this scheme of adoption, after the multistage compounding module of raw materials, set up mixture storage module before the extrusion equipment, save the raw materials through multistage compounding device misce bene, can eliminate the multistage compounding module of raw materials and extrude the work efficiency between the equipment poor, avoid appearing the multistage compounding module of raw materials output mixing materials too much extrusion equipment and can not in time digest, perhaps the problem that the equipment can not in time be output to the multistage compounding module of too big raw materials of mixed raw materials demand.

Because the raw materials is the mixture that major ingredient and multiple auxiliary material formed through the stirring, there is the difference in the physical property between every kind of raw materials, its shape promptly, the quality is different, and head tank's inner space is great, the in-process that the mixed raw materials dropped into head tank bottom through the head tank feed inlet, because the physical property difference between various raw materials leads to the speed of dropping of various raw materials inconsistent, thereby cause the raw materials uniformity degree that gets into behind the head tank to descend, set up the buffer tank and cushion the raw materials between temporary storage tank and head tank, can reduce the production of above-mentioned problem to a certain extent.

Further, mixture storage module still includes waste recycling mechanism, and waste recycling mechanism includes the waste material jar and is used for breaking into the breaker of granule with the waste material, and the discharge gate of breaker and the feed inlet of waste material jar intercommunication, the discharge gate of waste material jar passes through conveying pipe and discharging pipe intercommunication.

Has the advantages that: by adopting the scheme, the crusher crushes the waste into waste particles so as to conveniently add the waste into the raw materials, and the waste particles and the raw materials are discharged to subsequent processing equipment together for re-processing; the waste material granule gets into the waste material jar afterwards and saves, when the discharging pipe carries out the ejection of compact to the raw materials, the waste material granule carries out the ejection of compact with the raw materials in getting into the discharging pipe via the conveying pipe together to realize the recycle of waste material, be favorable to resources are saved, reduce extravagantly.

Further, the auxiliary material tank and the bottom of the raw material tank are both provided with a level transmitter, and the level transmitter is electrically connected with the PLC.

Has the advantages that: by adopting the scheme, the material level transmitter at the bottom of the auxiliary material tank feeds back material level information in the auxiliary material tank to the PLC, and when the auxiliary material amount in the auxiliary material tank is lower than a preset value, the PLC controls the auxiliary material mixing device to pre-mix various auxiliary materials so as to supplement the auxiliary material storage amount in the auxiliary material tank and ensure that the subsequent mixing work of the auxiliary materials and the main materials is smoothly carried out; the material level transmitter at the bottom of the raw material tank feeds back material level information in the raw material tank to the PLC, and when the raw material amount in the raw material tank is lower than a preset value, the PLC controls the raw material multistage mixing module to perform mixing operation on the main material and the auxiliary material, so that the fully mixed raw material enters the main material tank to be stored, and is conveyed to the extrusion equipment to perform subsequent pipe production steps.

Further, the bottom of the hot mixer and the bottom of the cold mixer are both provided with temperature sensors, and the temperature sensors are electrically connected with the PLC.

Has the advantages that: by adopting the scheme, the temperature sensor at the bottom of the hot mixer monitors the temperature in the hot mixer in real time, when the temperature in the hot mixer reaches a preset value, the temperature sensor at the bottom of the hot mixer feeds back the information to the PLC through an electric signal, the PLC controls the hot mixing discharge valve to be opened, and the material enters the cold mixer through the hot mixing discharge valve to be mixed at low temperature; the temperature sensor of cold muddy quick-witted bottom carries out real time monitoring to the temperature in the cold muddy machine, and when the temperature in the cold muddy machine reached the default, the temperature sensor of cold muddy quick-witted bottom fed back this information to PLC through the signal of telecommunication, and the cold discharge valve that mixes of control is opened by PLC again, discharges the material and carries out the transfer storage in the temporary storage tank. The hot mixing discharge valve and the cold mixing discharge valve are controlled to be opened and closed through the PLC, labor force is saved, meanwhile, time accuracy of opening and closing the valves is increased, and the problem that errors occur in material discharge time due to the fact that the time for opening the valves is advanced or delayed is avoided, and therefore the performance of materials cannot meet production requirements.

Further, all be equipped with spiral material loading machine between auxiliary material storehouse and the mixer and between head tank and the feed tank, spiral material loading machine passes through PLC and controls.

Has the advantages that: by adopting the scheme, because the elevation of the feeding end of the spiral feeding machine is lower than that of the discharging end of the spiral feeding machine, the spiral feeding machine is used between the auxiliary material bin and the stirring machine, so that the phenomenon that various auxiliary materials enter the stirring machine from the auxiliary material bin under the action of self gravity when auxiliary material mixing operation is not carried out can be avoided, and the addition amount of the various auxiliary materials does not meet the proportioning requirement; use spiral material loading machine between head tank and feed tank, can avoid the raw materials to get into feed tank from the head tank under self action of gravity, lead to the raw materials in the feed tank to excessively pile up even jam. And the spiral feeding machine is controlled through the PLC, so that the independent feeding can be realized, the labor force can be saved, the material conveying efficiency can be improved, and the output efficiency of the whole pipe production line is improved.

Further, be equipped with first vacuum pump between mixer and the auxiliary material jar, be equipped with the second vacuum pump between temporary storage tank and the buffer tank, first vacuum pump and second vacuum pump all are connected with the PLC electricity, are controlled by PLC.

Has the advantages that: this scheme of adoption sets up the vacuum pump between mixer and auxiliary material jar and between temporary storage tank and buffer tank, carries out the autonomic material loading through PLC control, has compared in artifical material loading labour saving and has still improved material loading efficiency in. And in actual production, there is certain distance usually between mixer and the auxiliary material jar and between temporary storage tank and the buffer tank, carry out material transmission through the vacuum pump and compare in using spiral material loading machine, material conveying pipeline's arrangement has more the flexibility, and available hose carries out the material transport, and is lower to the space requirement, more is suitable for the wide adoption.

Further, the communicating part of conveying pipe and discharging pipe is equipped with the third vacuum pump, and the third vacuum pump is connected with the PLC electricity, is controlled by PLC.

Has the advantages that: when the discharging pipe carries the raw materials, control the third vacuum pump through PLC and begin work, join in pumping the discharging pipe with the raw materials with the waste material from the conveying pipe to carry to the feed jar through discharging pipe and raw materials together finally, in order to supply follow-up processing. This scheme of adoption, on the one hand can improve the transport efficiency of waste material, and on the other hand also gets into the discharging pipe for the waste material from the intercommunication department of conveying pipe and discharging pipe and provides power to the feed connection department at conveying pipe and discharging pipe is blocked up to the raw materials of rotatory material loading in by the discharging pipe, and the cyclic utilization that not only can't realize the waste material still causes the conveying pipe to block up easily.

Drawings

FIG. 1 is a schematic process flow diagram of a pipe material mixing system according to the present invention.

Fig. 2 is a schematic structural diagram of a multistage mixing module for mixing raw materials of a tubular product raw material mixing system.

Fig. 3 is a schematic structural diagram of a mixture storage module of the pipe material mixing system.

Fig. 4 is a sectional view of a joint of a discharge hopper and a discharge pipe of a mixture storage module of the pipe raw material mixing system according to the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: auxiliary material bin 1, stirrer 2, auxiliary material tank 3, main material tank 4, weighing hopper 5, hot mixer 6, cold mixer 7, cold mixing water inlet pipe 71, cold mixing water outlet pipe 72, temporary storage tank 8, support leg 81, buffer tank 9, raw material tank 10, first gate 101, discharge hopper 102, spiral rotating shaft 103, feeding tank 11, waste tank 12, second gate 121, crusher 13, automatic metering scale 14, first vacuum pump 15, first level transmitter 16, first control valve 17, second control valve 18, weight sensor 19, pressing arm 191, hot mixing discharge valve 20, cold mixing discharge valve 21, first temperature sensor 22, second temperature sensor 23, second vacuum pump 24, second level transmitter 25, third vacuum pump 26, discharge pipe 27, feeding pipe 28, third control valve 29, precooler 30, precooling water inlet pipe 301, water outlet pipe 302, air intake device 31, air intake 311, air pump 312, and air intake device, An air inlet pipe 313 and a check valve 314.

Examples are shown in figures 1 to 4:

the utility model provides a tubular product raw materials compounding system, includes PLC to and auxiliary material compounding module, the multistage compounding module of raw materials and mixture storage module that communicate in proper order.

The auxiliary material compounding module includes auxiliary material compounding device and raw materials storage device, and the auxiliary material compounding device includes mixer 2 and a plurality of auxiliary material storehouse 1, and raw materials storage device includes auxiliary material jar 3 and a plurality of main material jar 4. The discharge hole of each auxiliary material bin 1 is communicated with the feed hole of the stirrer 2, a spiral feeding machine (not shown in the figure) is arranged between each auxiliary material bin 1 and the stirrer 2, and the spiral feeding machine is electrically connected with the PLC and is controlled by the PLC; the discharge port of the stirrer 2 is communicated with the feed inlet of the auxiliary material tank 3, and a first vacuum pump 15 is communicated between the stirrer 2 and the auxiliary material tank 3. And automatic weighing scales 14 are fixedly mounted on two sides of each auxiliary material bin 1, and the automatic weighing scales 14 are electrically connected with the PLC. A first level transmitter 16 is fixedly installed at the bottom of the auxiliary material tank 3, and the first level transmitter 16 is electrically connected with the PLC. The discharge gate fixed mounting of main material jar 4 has first control valve 17, and the discharge gate fixed mounting of auxiliary material jar 3 has second control valve 18, and first control valve 17 and second control valve 18 are electric butterfly valve, are connected with the PLC electricity, control through PLC.

The raw material multistage mixing module comprises a weighing hopper 5, a hot mixer 6, a precooler 30, a cold mixer 7 and a temporary storage tank 8 which are communicated sequentially through pipelines, discharge ports of a main material tank 4 and an auxiliary material tank 3 are communicated with a feed port of the weighing hopper 5 through pipelines, a plurality of pressure arms 191 are fixedly connected to the outer wall of the weighing hopper 5, a weight sensor 19 is supported at the bottom of each pressure arm 191, and the weight sensor 19 is electrically connected with a PLC. A third control valve 29 is communicated between the weighing hopper 5 and the hot mixer 6, a hot mixing discharge valve 20 is communicated between the hot mixer 6 and the pre-cooler 30, a cold mixing discharge valve 21 is communicated between the cold mixer 7 and the temporary storage tank 8, and the third control valve 29, the hot mixing discharge valve 20 and the cold mixing discharge valve 21 are all electrically connected with a PLC and are controlled by the PLC. The bottom fixedly connected with first temperature sensor 22 of hot machine 6 that mixes, the bottom fixedly connected with second temperature sensor 23 of cold machine 7 that mixes, first temperature sensor 22 and second temperature sensor 23 all are connected with the PLC electricity.

The working temperature of the precooler 30 is lower than that of the hot mixer 6 and higher than that of the cold mixer 7, the precooling cylinder wall of the precooler 30 is hollow to form a precooling cavity, and the precooling cavity is communicated with a precooling water inlet pipe 301 and a precooling water outlet pipe 302. A stirring shaft is coaxially and fixedly connected in a precooling cylinder of the precooler 30, the stirring shaft is fixedly connected with an output shaft of the motor, and stirring blades are fixedly connected on the stirring shaft. The mixing barrel wall of the cold mixer 7 is hollow to form a cold mixing cavity, the cold mixing cavity is communicated with a cold mixing water inlet pipe 71 and a cold mixing water outlet pipe 72, and the cold mixing water outlet pipe 72 is communicated with the pre-cooling water inlet pipe 301. The communicating parts of the cold mixing cavity, the cold mixing water inlet pipe 71 and the cold mixing water outlet pipe 72 are higher than the bottom of the mixing barrel of the cold mixer 7.

The hot mixer is a 6-position vertical mixer, and the cold mixer 7 is a horizontal mixer. The temporary storage tank 8 has a plurality of support legs 81, and the bottom of each support leg 51 is supported by a weight sensor, which is electrically connected to the PLC.

The mixture storage module comprises a mixture storage mechanism and a waste recovery mechanism, the mixture storage mechanism comprises a buffer tank 9 and a raw material tank 10, a feed inlet of the buffer tank 9 is communicated with a discharge outlet of a temporary storage tank 8, a second vacuum pump 24 is communicated between the temporary storage tank 8 and the buffer tank 9, and a discharge outlet of the buffer tank 9 is communicated with a feed inlet of the raw material tank 10. The discharge port of the raw material tank 10 is communicated with a first gate 101, the first gate 101 is detachably communicated with a discharge hopper 102 through a flange, the upper opening of the discharge hopper 102 is communicated with the discharge port of the raw material tank, the lower opening of the discharge hopper 102 is communicated with a discharge pipe 27, and the raw material tank 10 is communicated with a feed tank 11 of the extrusion equipment through the discharge pipe 27. A spiral feeding machine is installed between the raw material tank 10 and the feeding tank 11, and the spiral feeding machine is electrically connected with the PLC and controlled through the PLC. The spiral rotating shaft 103 of the spiral feeding machine penetrates into the discharging pipe 27 and extends into the discharging hopper 102, and a gap is formed between the inner wall of the discharging hopper 102 relative to the extending end of the spiral rotating shaft 103 and the extending end of the spiral rotating shaft 103. A second level transmitter 25 is fixedly arranged at the bottom of the raw material tank 10, and the second level transmitter 25 is electrically connected with the PLC.

The waste recycling mechanism comprises a waste tank 12 and a crusher 13 used for crushing waste into particles, a discharge hole of the crusher 13 is communicated with a feed inlet of the waste tank 12, the discharge hole of the waste tank 12 is communicated with a second gate 121, the second gate 121 is communicated with a feed pipe 28, one end of the feed pipe 28 is communicated with the waste tank 12 through the second gate 121, and the other end of the feed pipe 28 is communicated with a discharge pipe 27. A third vacuum pump 26 is communicated between the feeding pipe 28 and the discharging pipe 27, and the third vacuum pump 26, the first gate 101 and the second gate 121 are all electrically connected with and controlled by the PLC.

The mixture storage module further comprises an air intake device 31, the air intake device 31 comprises an air inlet 311 arranged on the raw material tank 10, an air pump 312 placed on the ground and an air intake pipe 313 used for connecting the air inlet 311 and the air pump 312, and the air intake pipe 313 and the air inlet 311 are detachably connected together through a flange. A check valve 314 is installed between the air pump 312 and the air inlet pipe 313.

The pipe raw material mixing system is used for mixing the raw materials for pipe production, and the auxiliary material mixing module is started firstly. The main materials are added into the main material tanks 4 through the feed inlets of the main material tanks 4, and because the proportion of the main materials is far larger than that of the auxiliary materials in the raw materials for producing the pipes, the main materials are stored by the main material tanks 4 for subsequent use. Each auxiliary material is added into one of the auxiliary material bins 1 through the feeding hole of the auxiliary material bin 1, and then is conveyed into the stirrer 2 through a spiral feeding machine. When the spiral material loading machine carries various auxiliary materials, the automatic weighing scale 14 of 1 both sides installation of every auxiliary material storehouse carries out the quantity calculation to the auxiliary material in the auxiliary material storehouse 1 separately, and when the output quantity of certain auxiliary material reached the default, the automatic weighing scale 14 on the auxiliary material storehouse 1 of storage this kind of auxiliary material passed through the signal of telecommunication and sends information to PLC, by the spiral material loading machine stop work that PLC control corresponds. When the output quantity of all auxiliary materials all reached the preset value, all spiral material loading machines of installing between auxiliary material storehouse 1 and mixer 2 all stopped working under PLC's control promptly, PLC re-control mixer 2 carries out the stirring operation to wherein various auxiliary materials to this moment. After the mixer 2 finishes the premixing of the auxiliary materials, the PLC controls the first vacuum pump 15 to work, and the auxiliary materials in the mixer 2 are sucked and conveyed to the auxiliary material tank 3 to be stored for subsequent use.

After the raw material multistage mixing module is started, the PLC firstly controls the first control valve 17 to be opened, the main materials stored in the main material tank 4 are added into the weighing hopper 5, at the moment, the weight sensors 19 arranged on two sides of the weighing hopper 5 sense the weight change of the materials in the weighing hopper 5, when the weight change quantity of the materials in the weighing hopper 5 reaches a first preset value, namely the addition quantity of the main materials reaches the preset value, the weight sensors 19 feed back the information to the PLC through electric signals, and the PLC controls the first control valve 17 to be closed; subsequently, the PLC controls the second control valve 18 to be opened, the auxiliary materials stored in the auxiliary material tank 3 are continuously added into the weighing hopper 5, at the moment, the weight sensors 19 arranged on two sides of the weighing hopper 5 continuously sense the weight change of the materials in the weighing hopper 5, when the weight change of the materials in the weighing hopper 5 reaches a second preset value, namely, the addition amount of the auxiliary materials reaches the preset value, the weight sensors 19 feed back the information to the PLC through electric signals, the PLC controls the second control valve 18 to be closed, and at the moment, the weighing of the main materials and the auxiliary materials is completed.

Then the PLC controls the third control valve 29 to be opened, the weighed main materials and the weighed auxiliary materials are added into the hot mixer 6 together, and the hot mixer 6 carries out high-temperature mixing operation on the main materials and the auxiliary materials. The hot mixer 6 is a vertical mixer, the main material and the auxiliary material are mixed in a mixing cylinder of the hot mixer 6, and the working principle is as follows: the spiral rapid rotation is utilized to lift the raw materials from the bottom of the barrel to the top end from the center, and then the raw materials are thrown back to the bottom in an umbrella shape, so that the raw materials are stirred in the barrel in a rolling manner, and a large amount of raw materials can be uniformly mixed in a short time. Based on the theory of operation of hot mixer 6, the spiral rotation can generate heat with raw materials friction, generally requires to reach 100 degrees centigrade during the high temperature compounding, consequently installs first temperature sensor 22 in the bottom of hot mixer 6, and first temperature sensor 22 is connected with the PLC electricity. In the high-temperature material mixing process, the first temperature sensor 22 arranged at the bottom of the hot mixer 6 monitors the temperature in the hot mixer 6 in real time, when the temperature in the hot mixer 6 reaches a preset value, the first temperature sensor 22 feeds information back to the PLC through an electric signal, the PLC controls the hot mixing and discharging valve 20 to be opened, and the raw materials subjected to high-temperature material mixing are added into the precooler 30 for precooling treatment.

Raw materials enter the precooler 30 from a feed inlet of the precooler 30, water flow is formed in a precooling cavity formed by hollowing of a precooling cylinder wall of the precooler 30 through a precooling water inlet pipe 301 and a precooling water outlet pipe 302 which are communicated, the temperature of the raw materials in the precooler 30 is lower than that of the hot mixer 6 but higher than that of the cold mixer 7, the raw materials are precooled in the precooler 30, the raw materials are prevented from directly entering the cold mixer 7, and the volume of the raw materials is rapidly reduced under the action of thermal expansion and cold contraction, so that more raw material dust is generated and the blockage is caused. In the process of precooling the raw materials in the precooler 30, the stirring shaft in the precooler 30 drives the stirring blades to rotate under the drive of the motor to stir the raw materials in the precooler 30, so that the raw materials in the precooler 30 can be further mixed and a better precooling effect can be achieved. After precooling, the raw materials enter a cold mixer 7 to be mixed at low temperature.

The cold mixer 7 is a horizontal mixer, the main materials and the auxiliary materials are mixed in a mixing cylinder of the cold mixer 7, and the working principle is as follows: the mixing cylinder is internally provided with double-shaft rotating reverse blades which form a certain angle to circularly stir the raw materials along the axial direction and the radial direction, so that the raw materials are quickly and uniformly mixed; and the speed reducer drives the rotating speed of the shaft and the structure of the paddle to weaken the gravity of the raw materials, and along with the lack of the gravity of the raw materials, the differences of particle sizes and specific gravity among various raw materials are ignored in the mixing process. When low-temperature mixing operation is carried out, the temperature is generally required to be reduced to about 60 ℃, so that the second temperature sensor 23 is arranged at the bottom of the cold mixer 7, and the second temperature sensor 23 is electrically connected with the PLC. At the in-process that cold mixer 7 carries out the low temperature compounding operation to the material, install the second temperature sensor 23 of cold mixer 7 bottom and carry out real-time supervision to the temperature in the cold mixer 7, when the temperature in the cold mixer 7 dropped to the default, second temperature sensor 23 feeds this information back to PLC through the signal of telecommunication, and the discharge valve 21 that mixes is mixed to cold by PLC control again is opened, will carry out the transit storage from cold mixer 7 discharge to temporary storage tank 8 through the raw materials of low temperature compounding. So far, the work of the raw material multistage mixing module is finished.

Because the cold cavity and cold mix inlet tube 71, cold mix outlet pipe 72's intercommunication department all is higher than the compounding bobbin base portion of cold mixer 7, the cooling water that flows into the cold cavity of mixing from cold mix inlet tube 71 can partly save the position at the compounding bobbin base, and the cooling water of saving spills over slowly from cold mix outlet pipe 72 along with cold mix inlet tube 71 constantly pours into rivers into for compounding bobbin base portion contacts with the cooling water all the time, builds good low temperature environment in the compounding bobbin.

Because the cold mixing water outlet pipe 72 is communicated with the pre-cooling water inlet pipe 301, cooling water with a certain temperature discharged from the cold mixing water outlet pipe 72 enters the pre-cooler 30 through the pre-cooling water inlet pipe 301, pre-cooling treatment is carried out on raw materials in the pre-cooler 30, and then the cooling water is discharged from the pre-cooling water outlet pipe 302, so that the cyclic utilization of the cooling water is realized, and the device is economical and environment-friendly.

After the raw materials got into temporary storage tank 8, the weight sensor who sets up in temporary storage tank 8 bottom stabilizer blade 81 can carry out weight sensing once more to the raw materials that the stirring was accomplished to confirm to get into the raw materials weight of temporary storage tank 8, this weighing result provides weight data for follow-up use raw materials manufacture tubular product, guarantees that follow-up procedure's accuracy goes on.

Mixture storage module starts afterwards, PLC controls second vacuum pump 24 earlier and gets into operating condition, second vacuum pump 24 inhales the mixed raw materials in will the temporary storage tank 8 and delivers to buffer tank 9, the mixed raw materials of process of transmission cushions through buffer tank 9, produce a large amount of dust when avoiding mixed raw materials to get into the great head tank 10 of inner space, a large amount of dust deposits are internal or are gushed into the pipeline and all lead to the structure to be damaged easily at the jar, if the dust flies upward working space then can reduce the air quality, lead to staff's operational environment variation. The mixed raw material after buffering is discharged from the discharge hole of the buffer tank 9, and is added into the raw material tank through the feed inlet of the raw material tank 10 for storage. When the extrusion equipment works, the PLC controls the spiral feeding machine arranged between the raw material tank 10 and the feeding tank 11 to convey the raw material stored in the raw material tank 10, controls the first gate 101 to be opened, discharges the raw material from the discharge hole of the raw material tank 10 through the first gate 101, enters the feeding tank 11 from the feed inlet of the feeding machine 11 through the discharge pipe 27 communicated between the raw material tank 10 and the feeding tank 11, and then carries out subsequent output on the raw material by the feeding tank 11.

Waste products generated in the subsequent processing process are added into the crusher 13, the crusher 13 crushes the waste materials into particles and then discharges the particles from the discharge port, and the particles of the waste materials enter the waste material tank 12 through a pipeline for storage and standby. When the spiral feeding machine installed between the PLC control raw material tank 10 and the feeding tank 11 conveys the raw materials stored in the raw material tank 10, the second gate 121 is controlled to be opened simultaneously, the third vacuum pump 26 is controlled to enter the working state, the waste materials stored in the waste material tank 12 are sucked and conveyed to the discharge pipe 27 through the feeding pipe 28 by the third vacuum pump 26, and after the waste materials enter the discharge pipe and are converged with the raw materials, the waste materials and the raw materials enter the feeding tank 11 together under the conveying of the spiral feeding machine, so that the raw materials are recycled.

Go out hopper 102 and stretch into the inner wall of end and spiral pivot 103 for spiral pivot 103 and stretch into and have the clearance between the end, spiral pivot 103 descends to some extent the conveying efficiency of raw materials, consequently the raw materials in discharging pipe 27 can not be filled with whole discharging pipe 27 is carried to spiral pivot 103, on the one hand for the waste material gets into discharging pipe 27 from conveying pipe 28 and the raw materials joins the headspace, on the other hand also prevents that the raw materials from overflowing in discharging pipe 27 and leading to the raw materials to emit into conveying pipe 28 from conveying pipe 28 and the intercommunication department of discharging pipe 27, thereby be favorable to the waste material to get into discharging pipe 27 and join with the raw materials, accomplish the ejection of compact together.

When the raw material storage allowance in the raw material tank 10 is not large, the air intake device 31 is opened to inflate the raw material tank 10. Air pump 312 is through the air-supply line 313 of intercommunication between the air intake 311 of head tank 313 and air pump 312, with the air transport head tank 10 in, form the malleation in head tank 10 is inside, blows the raw materials surplus in the head tank 10 to the spiral pivot 103 department in the play hopper 102 for the raw materials is carried out by spiral pivot 103 completely, avoids the raw materials to remain in head tank 10 and leads to the waste. In order to prevent the raw material from entering the air pump 312 when the air pump 312 is in standby, and thus the air pump 312 from being damaged or even burnt, a check valve 314 is installed between the air pump 312 and the air inlet pipe 313 to prevent the raw material from entering the air pump 312 through the air inlet pipe 313.

First level transmitter 16 is installed to the bottom of auxiliary material jar 3, and after the auxiliary material that stores in auxiliary material jar 3 descends to preset position, first level transmitter 16 transmits this information for PLC through the circuit, starts the work of premixing of auxiliary material by PLC start-up auxiliary material compounding device to fill auxiliary material jar 3 and make the auxiliary material that stores in the auxiliary material jar 3 have sufficient volume supply follow-up module work to use. The second position transmitter 25 is installed to the bottom of head tank 10, after the raw materials that store in head tank 10 dropped to preset position, the second position transmitter 25 feeds this information back to PLC through the signal of telecommunication, by the multistage compounding module of PLC control raw materials entering operating condition, carry out multistage compounding operation to major ingredient and auxiliary material, mixed raw materials after multistage compounding operation is filled into head tank 10 again to supply the spiral material loading machine to carry to feed material jar 11, again by feed jar 11 to extrusion equipment feed carry out subsequent processing.

The above description is only a part of the embodiments of the present invention, and the general knowledge of the known specific structures and characteristics in the schemes is not described herein too much. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, and these changes and modifications should be considered as the protection scope of the present invention, and these changes and modifications will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a tubular product raw materials compounding system which characterized in that: the auxiliary material mixing device comprises a stirrer and a plurality of auxiliary material bins, and the raw material storage device comprises an auxiliary material tank and a main material tank; the discharge port of each auxiliary material bin is communicated with the feed port of the stirrer, the discharge port of the stirrer is communicated with the feed port of the auxiliary material tank, and the discharge port of the raw material storage device is communicated with the raw material multistage mixing module; and each two sides of the auxiliary material bin are respectively provided with an automatic weighing scale, and the PLC is used for controlling the automatic weighing scales to complete the weighing operation of the auxiliary materials.

2. A tubular product raw material mixing system according to claim 1, characterized in that: a first control valve is arranged at the discharge port of the main material tank, a second control valve is arranged at the discharge port of the auxiliary material tank, and the first control valve and the second control valve are both electrically connected with the PLC; the raw material multistage mixing module comprises a weighing hopper, a mixing mechanism and a temporary storage tank which are sequentially arranged, and weight sensors electrically connected with the PLC are arranged on two sides of the weighing hopper; the discharge ports of the main material tank and the auxiliary material tank are communicated with the feed port of the weighing hopper.

3. A tubular product raw material mixing system according to claim 2, characterized in that: the material mixing mechanism comprises a hot mixer and a cold mixer, a third control valve is arranged between the weighing hopper and the hot mixer, a hot mixing discharge valve is arranged between the hot mixer and the cold mixer, a cold mixing discharge valve is arranged between the cold mixer and the temporary storage tank, and the third control valve, the hot mixing discharge valve and the cold mixing discharge valve are all electrically connected with the PLC.

4. A tubular product raw material mixing system according to claim 3, characterized in that: still include mixture storage module, mixture storage module includes mixture storage mechanism, and mixture storage mechanism includes buffer tank and head tank, the feed inlet of buffer tank and the discharge gate intercommunication of temporary storage tank, the discharge gate of buffer tank and the feed inlet intercommunication of head tank, the head tank is connected to extrusion equipment's feed jar through the discharging pipe.

5. A tubular product raw materials compounding system of claim 4, characterized by: the mixture storage module still includes waste recycling mechanism, and waste recycling mechanism includes the waste material jar and is used for breaking into the breaker of granule with the waste material, and the discharge gate of breaker and waste material jar's feed inlet intercommunication, the discharge gate of waste material jar passes through conveying pipe and discharging pipe intercommunication.

6. A tubular product raw materials compounding system of claim 5, characterized by: and the auxiliary material tank and the bottom of the raw material tank are both provided with a level transmitter, and the level transmitter is electrically connected with the PLC.

7. A tubular product raw materials compounding system of claim 6, characterized by: the bottom of the hot mixer and the bottom of the cold mixer are both provided with temperature sensors, and the temperature sensors are electrically connected with the PLC.

8. A tubular product raw material mixing system according to claim 7, characterized in that: spiral feeding machines are arranged between the auxiliary material bin and the stirrer and between the raw material tank and the feeding tank, are electrically connected with the PLC and are controlled through the PLC.

9. A tubular product raw material mixing system according to claim 8, characterized in that: be equipped with first vacuum pump between mixer and the auxiliary material jar, be equipped with the second vacuum pump between temporary storage tank and the buffer tank, first vacuum pump and second vacuum pump all are connected with the PLC electricity, are controlled by PLC.

10. A tubular product raw material mixing system according to claim 9, characterized in that: and a third vacuum pump is arranged between the feeding pipe and the discharging pipe, is electrically connected with the PLC and is controlled by the PLC.