Efficient polyamide-6 matting agent metering system

Abstract

The utility model provides an efficient chinlon 6 matting agent metering system which is characterized in that a matting agent feeding pipe is connected with a feeding main valve, the feeding main valve is connected with a first three-way control valve, the first three-way control valve is connected with a matting agent conveying pipeline, the matting agent conveying pipeline is connected with a second three-way control valve, and the second three-way control valve is connected with a discharging main valve. The discharging main valve is connected with a matting agent discharging pipe; each matting agent conveying pipeline comprises a water inlet valve, a first manual valve, a metering pump, a second manual valve and a water outlet valve, the first manual valve is connected with the first three-way control valve, the water inlet valve is connected between the first manual valve and the first three-way control valve, the first manual valve is connected with the metering pump, the metering pump is connected with the second manual valve, and the water outlet valve is connected with the second manual valve. The second manual valve is connected with the second three-way valve, and the water outlet valve is connected between the second manual valve and the second three-way valve. No flexible pipe and flange are assembled and disassembled, so that time and labor are saved, the phenomena of pump stop and interruption of entering of a delustering agent into a polymerization tower in the switching operation process are avoided, and the slice production process is kept stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyamide antistatic agent adding equipment production technical field especially relates to a kind of high-efficiency polyamide 6 antistatic agent metering system. BACKGROUND

[0002] In the production process of polyamide 6 polymerization semi-dull and full-dull chip, antistatic agent, i.e. titanium dioxide suspension, needs to be added. The antistatic agent is pumped into the polymerization tower according to the process ratio. In the existing metering process, the inlet and outlet of the metering pump are connected to the metering conveying pipeline by hoses. The metering system has the following defects:

[0003] 1. The metering pump is one active and one standby, and the inlet and outlet are connected by hoses. When switching the metering pump, the pump must be stopped, the inlet and outlet valves must be closed, and the inlet hose must be disconnected from the inlet of the metering pump and connected to the inlet of the other metering pump. Similarly, the outlet hose of the pump must be disconnected to complete the switching of the pump. Moreover, the hose and the metering pipeline are connected by flanges. When switching the pump, the flanges must be disconnected first, and then the other hose must be connected to the metering pipeline by flanges. The operation is very complicated and time-consuming.

[0004] 2. The entire operation process, including stopping the pump, disconnecting the hose, connecting the hose, disassembling the flanges, and starting the pump, takes about 30 minutes. It is time-consuming and labor-intensive, and no antistatic agent is added to the polymerization tower for about 30 minutes, which reduces the quality of the chip.

[0005] 3. The hose is usually more than 1 meter long. During the process of stopping the pump and disconnecting the hose, the residual antistatic agent in the hose is discharged, causing waste of materials and increasing the production cost of the factory.

[0006] 4. The hose may fall off or break during use, which may cause a large amount of antistatic agent to leak, thereby interrupting the production of the chip and causing a large amount of waste of materials and degradation of the quality of the chip. INVENTION CONTENTS

[0007] The utility model solves the technical problem of providing a high-efficiency polyamide 6 antistatic agent metering system that can ensure the stability of the chip production process during the switching operation of the metering pump.

[0008] The utility model is implemented as follows:

[0009] The utility model provides a kind of high-efficiency polyamide 6 antistatic agent metering system, including antistatic agent feed pipe, the antistatic agent feed pipe is connected with inlet total valve, the inlet total valve is connected with first three-way control valve, the first three-way control valve is connected with two antistatic agent conveying pipelines of alternate use, the antistatic agent conveying pipeline is connected with second three-way control valve, the second three-way control valve is connected with outlet total valve, the outlet total valve is connected with antistatic agent discharge pipe, and the antistatic agent discharge pipe is connected with polymerization tower.

[0010] Each of the extinction agent delivery pipeline comprises a water inlet valve, a first manual valve, a metering pump, a second manual valve and a water outlet valve, the first manual valve is connected with the first three-way control valve, the water inlet valve is connected with the water inlet pipe, and the end of the water inlet valve away from the water inlet pipe is connected between the first manual valve and the first three-way control valve, the first manual valve is connected with the metering pump, the other end of the metering pump is connected with the second manual valve, the second manual valve is connected with the second three-way valve, one end of the water outlet valve is connected between the second manual valve and the second three-way valve, and the other end of the water outlet valve is connected with the recovery pipe.

[0011] Further, the extinction agent discharge pipe is provided with a flow meter.

[0012] The utility model discloses the advantages are:

[0013] 1. the metering system is simple, quick and convenient to operate.

[0014] 2. the extinction agent metering operation is simple, and there is no hose and flange folding, which saves time and labor, and the extinction agent is little wasted, and the factory production cost does not increase.

[0015] 3. the metering pump switching operation process will not have the phenomenon of stopping pump and interrupting extinction agent into the polymerization tower, makes the slice production process keep stable, and the slice quality will not have the risk of falling, and the slice quality is effectively guaranteed.

[0016] 4. in the metering process, the hose is abandoned, so there is no hose falling off and rupture phenomenon, and there is no extinction agent leakage, waste phenomenon and slice quality degradation situation. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described below in combination with the embodiment with reference to the drawings.

[0018] Figure 1 It is the structure schematic diagram of polyamide 6 extinction agent metering system for the utility model.

[0019] Explanation of reference numerals in the drawing:

[0020] 1, extinction agent feed pipe, 2, feed total valve, 3, first three-way control valve, 31, first control switch, 4, extinction agent delivery pipeline, 41, water inlet valve, 42, first manual valve, 43, metering pump, 44, second manual valve, 45, water outlet valve, 5, second three-way control valve, 51, second control switch, 6, discharge total valve, 7, extinction agent discharge pipe, 8, flow meter. DETAILED DESCRIPTION

[0021] Please refer to Figure 1The utility model provides a kind of efficient nylon 6 matting agent metering system, including matting agent feed pipe 1, the matting agent feed pipe 1 is connected with feed total valve 2, the feed total valve 2 is connected with first three-way control valve 3, first three-way control valve 3 has A port, B port and C port, feed total valve 2 is connected with the A port of first three-way control valve 3 by pipeline connection, first three-way control valve 3 has a first control switch 31, by first control switch 31, matting agent can be controlled to flow out from B port or C port;The first three-way control valve is connected with two matting agent delivery pipelines 4 of alternate use, one end of two matting agent delivery pipelines 4 is connected in B port and C port respectively, the matting agent delivery pipeline 4 is jointly connected with second three-way control valve 5, second three-way control valve 5 has D port, E port and F port, other end of two matting agent delivery pipelines 4 is connected in E port and F port respectively, second three-way control valve 5 has a second control switch 51, and second control switch 51 cooperates with first control switch 31, can make matting agent flow into second three-way control valve 5 from E port or F port, and flow out from D port, the second three-way control valve 5 is connected with discharge total valve 6, and discharge total valve 6 is connected in D port, and second three-way control valve 5 is also connected by pipeline with discharge total valve 6, the discharge total valve 6 is connected with matting agent discharge pipe 7, and the matting agent discharge pipe 7 is connected with polymerization tower;

[0022] Each of the matting agent delivery pipeline 4 includes water inlet valve 41, first manual valve 42, metering pump 43, second manual valve 44 and water outlet valve 45, and the water inlet valve 41, first manual valve 42, metering pump 43, second manual valve 44 and water outlet valve 45 are connected by pipeline, the first manual valve 42 is connected with the first three-way control valve, the water inlet valve 41 is connected with water inlet pipe 46, and one end of the water inlet valve 41 away from the water inlet pipe is connected between the first manual valve 42 and the first three-way control valve.

[0023] And the water inlet valve 41 is arranged closer to the first three-way control valve to reduce the dead angle of the delivery pipeline, and the pipeline can be more comprehensively cleaned when cleaning the pipeline.

[0024] The first manual valve 42 is connected with the metering pump 43, the other end of the metering pump 43 is connected with the second manual valve 44, the second manual valve 44 is connected with the second three-way control valve 5, one end of the water outlet valve 45 is connected between the second manual valve 44 and the second three-way control valve 5, and the other end of the water outlet valve 45 is connected with the recovery pipe 47.

[0025] The water outlet valve 45 is arranged closer to the second three-way control valve 5 to reduce the dead angle of the delivery pipeline, and the pipeline can be more comprehensively cleaned when cleaning the pipeline.

[0026] For convenience of description, two light-extinction agent conveying pipelines 4 are divided into a first light-extinction agent conveying pipeline and a second light-extinction agent conveying pipeline in the embodiment. As shown in the figure, a first hand valve 42 in the first light-extinction agent conveying pipeline is connected to a B port of the first three-way control valve, a water inlet valve 41 in the first light-extinction agent conveying pipeline is connected between the first hand valve 42 and the B port, a second hand valve 44 in the first light-extinction agent conveying pipeline is connected to an E port of the second three-way control valve 5, and a water outlet valve 45 in the first light-extinction agent conveying pipeline is connected between the second hand valve 44 and the E port.

[0027] A first hand valve 42 in the second light-extinction agent conveying pipeline is connected to a C port of the first three-way control valve, a water inlet valve 41 in the second light-extinction agent conveying pipeline is connected between the first hand valve 42 and the C port, a second hand valve 44 in the second light-extinction agent conveying pipeline is connected to an F port of the second three-way control valve 5, and a water outlet valve 45 in the second light-extinction agent conveying pipeline is connected between the second hand valve 44 and the F port.

[0028] Specifically, the light-extinction agent outlet pipe 7 is provided with a flow meter 8.

[0029] A specific application of the utility model is:

[0030] Before starting the metering pump 43 in the first light-extinction agent conveying pipeline, the first light-extinction agent conveying pipeline is cleaned first. During cleaning, the feed total valve 2 and the discharge total valve 6 are closed, and the A port and the B port of the first three-way control valve 3 are blocked and the D port and the E port of the second three-way control valve 5 are blocked through the first control switch 31 and the second control switch 51; the first hand valve 42, the second hand valve 44, the water inlet valve 41 and the water outlet valve 45 in the first light-extinction agent conveying pipeline are opened, at this time, the desalted water flows into the first light-extinction agent conveying pipeline from the water inlet pipe; when water flows out of the water outlet valve 45, the metering pump 43 in the first light-extinction agent conveying pipeline is started to strengthen cleaning.

[0031] The desalted water flowing out of the water outlet valve 45 is checked, and if there is no impurity, the cleaning is completed. The pump is stopped, the water is closed, the water inlet valve 41 is closed, and the water outlet valve 45, the first hand valve 42 and the second hand valve 44 are kept open.

[0032] The A port and the B port of the first three-way control valve 3 are conducted and the D port and the E port of the second three-way control valve 5 are conducted through the first control switch 31 and the second control switch 51, and the feed total valve 2 is opened, when a small amount of light-extinction agent flows out of the water outlet valve 45, the water outlet valve 45 is closed, the discharge total valve 6 is opened, and the metering pump 43 is started. At this time, the light-extinction agent enters the polymerization tower through the feed total valve 2, the first three-way control valve 3, the first hand valve 42, the metering pump 43, the second hand valve 44, the second three-way control valve 5, the discharge total valve 6, the flow meter 8.

[0033] When the device is maintained and the delivery pipeline of the quenching agent is switched, that is, the delivery pipeline of the quenching agent is switched to the second quenching agent delivery pipeline flowing to the polymerization tower. First, the second quenching agent delivery pipeline is cleaned. Since the device maintenance is planned, the cleaning of the second quenching agent delivery pipeline can be performed in advance to reduce the interruption time of the quenching agent, and since the C port of the first three-way control valve 3 is in a blocking state with the A port and the B port, and the F port of the second three-way control valve is in a blocking state with the D port and the E port, the cleaning of the second quenching agent delivery pipeline will not affect the delivery of the quenching agent in the first quenching agent delivery pipeline.

[0034] When the second quenching agent delivery pipeline is cleaned, the C port of the first three-way control valve 3 is in a blocking state with the A port and the B port, and the F port of the second three-way control valve is in a blocking state with the D port and the E port. Therefore, at this time, the first manual valve 42, the second manual valve 44, the water inlet valve 41 and the water outlet valve 45 in the second quenching agent delivery pipeline can be directly opened, and the desalted water flows from the water inlet pipe into the second quenching agent delivery pipeline. When water flows out of the water outlet valve 45, the metering pump 43 in the second quenching agent delivery pipeline is started to strengthen the cleaning.

[0035] The desalted water flowing out of the water outlet valve 45 is checked, and if there is no impurity, the cleaning is completed. The pump is stopped, the water is closed, the water inlet valve 41 is closed, and the water outlet valve 45, the first manual valve 42 and the second manual valve 44 are kept open.

[0036] By the first control switch 31 and the second control switch 51, the A port of the first three-way control valve 3 is connected to the C port (at this time, the A port is blocked with the B port), and the D port of the second three-way control valve 5 is connected to the F port (at this time, the D port is blocked with the E port), at this time, the quenching agent flows to the second quenching agent delivery pipeline. When a small amount of quenching agent flows out of the water outlet valve 45, the water outlet valve 45 is closed, the discharge total valve 6 is opened, and the metering pump 43 in the second quenching agent delivery pipeline is started. At this time, the quenching agent enters the polymerization tower through the feed total valve 2, the first three-way control valve 3, the first manual valve 42, the metering pump 43, the second manual valve 44, the second three-way control valve 5, the discharge total valve 6 and the flow meter 8.

[0037] Since the second quenching agent delivery pipeline is cleaned in advance when the quenching agent delivery pipeline is switched, the interruption time of the quenching agent is short, and there is no phenomenon of interrupting the quenching agent into the polymerization tower during the switching operation of the metering pump, so that the chip production process is stable, the chip quality will not be at risk of decline, and the chip quality is effectively guaranteed.

[0038] The advantages of the nylon 6 dulling agent metering system are that the metering system is simple, fast and convenient to clean, the dulling agent metering operation is simple, there is no hose and flange folding, time and labor are saved, the dulling agent is little wasted, the factory production cost is not increased, there is no pump stopping and interruption of the dulling agent into the polymerization tower during the metering pump switching operation, the chip production process is kept stable, the chip quality is not at risk of decline, the chip quality is effectively ensured, the hose is abandoned during the metering process, there is no hose falling off and breaking phenomenon, there is no dulling agent leakage and waste phenomenon and chip quality degradation situation.

[0039] Although the specific embodiments of the present application are described above, those skilled in the art should understand that the specific embodiments described are only illustrative, not for limiting the scope of the present application, and equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present application should be covered within the scope of the claims of the present application.

Claims

1. A high efficiency polyamide 6 matting agent dosing system comprising a matting agent feed pipe, characterized in that: The extinction agent feeding pipe is connected with a feeding total valve, the feeding total valve is connected with a first three-way control valve, the first three-way control valve is connected with two extinction agent conveying pipelines for alternate use, the two extinction agent conveying pipelines are jointly connected with a second three-way control valve, the second three-way control valve is connected with a discharging total valve, the discharging total valve is connected with an extinction agent discharging pipe, and the extinction agent discharging pipe is connected with the polymerization tower. Each of the extinction agent conveying pipelines comprises a water inlet valve, a first manual valve, a metering pump, a second manual valve and a water outlet valve, the first manual valve is connected with the first three-way control valve, the water inlet valve is connected with a water inlet pipe, one end of the water inlet valve away from the water inlet pipe is connected between the first manual valve and the first three-way control valve, the first manual valve is connected with the metering pump, the other end of the metering pump is connected with the second manual valve, the second manual valve is connected with the second three-way valve, one end of the water outlet valve is connected between the second manual valve and the second three-way valve, and the other end of the water outlet valve is connected with a recovery pipe.

2. A high efficiency nylon 6 matting agent metering system as defined in claim 1, wherein: The extinction agent discharging pipe is provided with a flow meter.

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