Return cotton compressing system based on gap control

Abstract

The utility model discloses a return cotton compressing system based on gap control, which belongs to the technical field of return cotton compressing automatic control and comprises a main switch, a micro differential pressure switch, a compressor, a fan, a time relay, a button and a relay. Wherein the main switch is used for turning on and turning off a main power supply of the system, and the micro pressure difference switch is connected to an upper pipe and a lower pipe of the compactor through an air pipe, detects the pressure difference between the upper pipe and the lower pipe and is turned on or turned off within a set pressure difference range; the time relay is used for being triggered in the closed state of the micro differential pressure switch and being switched off after a preset time is delayed. And through the cooperation of the button and the relay, the working states of the fan and the compactor are controlled. According to the utility model, the fibers can be output in a clearance manner according to the storage capacity of the fibers in the compactor, so that the output fibers are bulked to meet the reuse requirement, and the yarn forming quality of a subsequent workshop section is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic control of flower return pressing, and more particularly to a flower return pressing system based on gap control. Background Art

[0002] In the textile industry, the carding machine is a key piece of equipment for combing raw cotton or recycled fiber. The fibers processed by the carding machine (often referred to as "recycled fibers") are fed through a conveying system into a compactor for further processing to form fiber strips suitable for subsequent processing. Traditional compactors typically operate in a continuous mode, with a propeller rotating continuously to compress and shape the incoming recycled fibers.

[0003] However, in actual operation, it was discovered that this continuous compacting method has obvious shortcomings. Because the compressor propeller works continuously, it will continuously apply pressure to the recycled fiber, causing the processed recycled fiber to be over-compressed into a twisted or shredded shape. This type of fiber strip not only makes it difficult to meet the requirements of certain specific processes, but also has a tight and hard structure, affecting the quality of the final product, such as the feel and appearance of the fabric. In addition, overly tight fiber strips are not easy to reuse, which reduces the recyclability of the material, increases production costs, and may cause waste of resources.

[0004] Therefore, how to provide a gap-controlled back-stitch pressing system that can solve the above problems is an urgent problem that those skilled in the art need to solve. Utility Model Content

[0005] In view of this, the present invention provides a back-spinning pressing system based on gap control, which is used to solve the technical problems existing in the above-mentioned prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A back-stitch pressing system based on gap control, comprising:

[0008] Main switch, micro pressure differential switch, compressor, fan, time relay, button and relay;

[0009] Among them, the main switch is used to turn on and off the main power of the system, the micro-pressure differential switch is connected to the upper and lower tubes of the compressor through the air pipe, detects the pressure difference between the upper and lower tubes, and closes or disconnects within the set pressure difference range; the time relay is used to trigger when the micro-pressure differential switch is in the closed state, and disconnects after a preset delay; the working status of the fan and the compressor is controlled by the cooperation of the button and the relay.

[0010] Preferably, the maintenance switch is used to isolate the control power supply for maintenance.

[0011] Preferably, when the fan is in the air suction state, the increase of the cotton accumulation leads to the decrease of the negative pressure of the lower pipe and the invariability of the negative pressure of the upper pipe, the pressure difference between the upper pipe and the lower pipe increases, the micro pressure difference switch detects that the pressure difference reaches the set value, and the micro pressure difference switch is closed.

[0012] Preferably, the relay comprises:

[0013] a first relay, a second relay and a third relay;

[0014] The normally open main contact of the first relay is connected with the fan.

[0015] The normally open main contact of the second relay is connected with the tightener.

[0016] The normally open main contact of the third relay is connected in parallel with the normally open main contact of the second relay.

[0017] Preferably, the total switch comprises:

[0018] a first total switch, a second total switch and a third total switch;

[0019] One side of the main contact of the first total switch is connected with the three-phase power supply, and the other side of the main contact of the first total switch is connected with the normally open main contact of the first relay; one side of the main contact of the second total switch is connected with the three-phase power supply, and the other side of the main contact of the second total switch is connected with the normally open main contact of the second relay and the normally open main contact of the third relay;

[0020] The normally open auxiliary contact of the third total switch is connected in series with the normally open auxiliary contact of the first total switch and the normally open auxiliary contact of the second total switch.

[0021] Preferably, the button comprises:

[0022] a first normally closed button, a second normally open button, a third normally closed button, a fourth normally open button and a fifth normally closed button;

[0023] The first normally closed button is connected with the second normally open button in series and connected with the coil of the first relay, and the coil of the first relay is connected with the normally open auxiliary contact of the second total switch; the second normally open button is connected in parallel with the first normally open auxiliary contact of the first relay and used to control the start and stop of the fan.

[0024] The third normally closed button, the fourth normally open button and the normally closed auxiliary contact of the third relay are connected in series with the coil of the second relay, and the coil of the second relay is connected with the normally open auxiliary contact of the second general switch, for controlling the forward rotation or reverse rotation of the tight presser.

[0025] The fifth normally closed button is connected in series with the normally open linkage contact of the third normally closed button, the normally closed linkage contact of the fourth normally open button and the normally closed auxiliary contact of the second relay, and the coil of the third relay is connected with the normally open auxiliary contact of the second general switch, for controlling the stop of the tight presser.

[0026] Preferably, the coil of the time relay is connected with the normally open contact of the micro pressure difference switch, and the normally open contact of the time relay is connected in parallel with the normally open linkage contact of the third normally closed button.

[0027] Preferably, the maintenance switch is further included, the normally open contact of the maintenance switch is connected in parallel with the second normally open auxiliary contact of the first relay, and the normally closed linkage contact of the maintenance switch is connected with the control power supply.

[0028] Compared with the prior art, the utility model discloses a kind of tight press systems based on gap control, and the yarn quality of subsequent work section is improved by tight presser gap operation control, according to the storage gap of fiber in tight presser, the output fiber bulkiness meets the requirement of reuse again. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on the provided drawings.

[0030] Figure 1 It is the circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0032] Referring to Figure 1The utility model discloses an embodiment of the utility model discloses a kind of tight pressing systems based on gap control, including:

[0033] General switch, micro pressure difference switch, tight press M2, fan M1, time relay, button and relay;

[0034] Wherein, general switch is used to the total power supply of system opening and closing, micro pressure difference switch is connected to the upper tube and lower tube of tight press M2 by trachea, detects the pressure difference between upper tube and lower tube, and closes or disconnects in the set pressure difference range;Time relay is used to trigger in the closed state of micro pressure difference switch, disconnects after preset time delay;The cooperation of button and relay controls the working state of fan M1 and tight press M2.

[0035] In a specific embodiment, further comprising: maintenance switch SA1, maintenance switch is used to isolate control power supply to maintain.

[0036] In a specific embodiment, when fan M1 is in the state of air suction, the pressure difference between the upper tube and lower tube of tight press M2 increases when the increase of cotton gathering leads to the decrease of lower tube negative pressure of tight press M2 and the invariability of upper tube negative pressure, micro pressure difference switch P detects that the pressure difference reaches set value, and micro pressure difference switch P closes.

[0037] In a specific embodiment, relay includes:

[0038] First relay KM1, second relay KM2 and third relay KM3;

[0039] Wherein, the normally open main contact of first relay KM1 is connected with fan M1;

[0040] The normally open main contact of second relay KM2 is connected with tight press M2;

[0041] The normally open main contact of third relay KM3 is connected in parallel with the normally open main contact of second relay KM2.

[0042] In a specific embodiment, general switch includes:

[0043] First general switch QF1, second general switch QF2 and third general switch QF3;

[0044] The main contact side of first general switch QF1 is connected with three-phase power supply, and the main contact other side of first general switch QF1 is connected with the normally open main contact of first relay KM1;The main contact side of second general switch QF2 is connected with three-phase power supply, and the main contact other side of second general switch QF2 is connected with the normally open main contact of second relay KM2 and the normally open main contact of third relay KM3;

[0045] The normally open auxiliary contact of the third main switch QF3 is connected in series with the normally open auxiliary contact of the first main switch QF1 and the normally open auxiliary contact of the second main switch QF2.

[0046] In one embodiment, the button comprises:

[0047] The first normally closed button SB1, the second normally open button SB2, the third normally closed button SB3, the fourth normally open button SB4 and the fifth normally closed button SB5 are connected in series.

[0048] The first normally closed button SB1 and the second normally open button SB2 are connected in series and connected with the coil of the first relay KM1, and the coil of the first relay KM1 is connected with the normally open auxiliary contact of the second main switch QF2.

[0049] The third normally closed button SB3, the fourth normally open button SB4 and the normally closed auxiliary contact of the third relay KM3 are connected in series and connected with the coil of the second relay KM2, and the coil of the second relay KM2 is connected with the normally open auxiliary contact of the second main switch QF2, for controlling the forward rotation or reverse rotation of the compactor.

[0050] The fifth normally closed button SB5 is connected in series with the normally open linkage contact of the third normally closed button SB3, the normally closed linkage contact of the fourth normally open button SB4 and the normally closed auxiliary contact of the second relay KM2, and the coil of the third relay KM3 is connected with the normally open auxiliary contact of the second main switch QF2 for controlling the stop of the compactor.

[0051] In one embodiment, the coil of the time relay KT is connected with the normally open contact of the micro pressure difference switch P, and the normally open contact of the time relay is connected in parallel with the normally open linkage contact of the third normally closed button SB3.

[0052] In one embodiment, the normally open contact of the maintenance switch SA1 is connected in parallel with the second normally open auxiliary contact KM1-2 of the first relay KM1, and the normally closed linkage contact of the maintenance switch SA1 is connected with the control power supply (380v AC).

[0053] The working principle of the utility model is as follows:

[0054] First, press the second normally open button SB2 fan start button, KM1 is attracted and self-protected, the fan runs, the pipeline forms negative pressure suction cotton, and the first relay KM1 auxiliary contact enables the compactor control circuit. SB1 is a fan stop button, and the fan stops after being pressed, and the compactor stops working.

[0055] The embodiment can adjust the set pressure difference value between 1.4-10 mbar through a mechanical knob adjustable micro pressure difference switch P. The micro pressure difference switch P is connected to the upper pipe and lower pipe of the tightener M2 through the air pipe to detect the pressure difference. When the pressure difference is greater than the set value, the switch is closed. In the state of air suction, the air suction circuit forms negative pressure, the cotton gathering increases, the negative pressure of the lower pipe decreases, the negative pressure of the upper pipe does not change, so the pressure difference increases, when the pressure difference increases to the set value, the precise adjustable digital display type power-off delay type time relay shown by the red dashed line frame starts to work, the normally open contact of the time relay KT is temporarily closed, the coil of the third relay KM3 is powered on, and the tightener M2 is driven to work in the positive direction. Once the tightener M2 works, it will cause the pressure difference to become smaller, when the pressure difference is lower than the set value, the micro pressure difference switch P is disconnected, the time relay KT starts to delay, so the tightener M2 will not stop working immediately, and must be delayed to the set time before stopping working. Generally, it needs to be delayed for about 10 seconds to press the cotton downward, and then wait for the cotton to gather again, repeat the above process, so that the tightener M2 works intermittently, avoiding the continuous work of the tightener, which increases the friction frequency of the cotton and makes the output cotton into a twisted shape, which is tight and hard. At the same time, it also avoids the waste caused by not being able to be used twice. The intermittent work reduces the frequent friction of the cotton, so that the output cotton can be used again, saving resources and cost.

[0056] The circuit is also designed with a third normally closed button SB3, a fourth normally open button SB4, and a fifth normally closed button SB5 for the tightener M2 to stop working. In addition, a maintenance switch SA1 is installed, which is turned on when the maintenance switch SA1 is turned on, the pressure difference control circuit is disconnected, which is convenient for maintenance and is practical.

[0057] Specifically, the maintenance switch SA1 is mainly used to cut off the control circuit when equipment maintenance or inspection is needed, to prevent safety hazards caused by accidental start. It usually adopts normally closed contact, when in normal working state, SA1 is in off position, its internal normally closed contact is closed, allowing control signal to pass from input to next link. In this way, the whole system runs according to the established logic.

[0058] When maintenance is needed, the operator will turn on the maintenance switch SA1. At this time, the normally closed contact in the maintenance switch SA1 is disconnected, interrupting the transmission path of the control signal, thus preventing the operation of the tightener and the fan and other equipment. This ensures that the equipment cannot be started by mistake during maintenance, improving the safety of the workers.

[0059] Only when the maintenance is completed and the maintenance switch SA1 is restored to its original position, the normally closed contact will be closed again, the control signal will be smooth, and the equipment can return to normal working state. This design follows the principle of "safety first", and is one of the common safety measures in industrial automation system.

[0060] By the technical scheme, the working state of the tight presser can be automatically adjusted according to actual needs, and product quality problems caused by continuous high compression can be avoided. An ideal solution should be able to realize the gap working of the tight presser, that is, the tight pressing process is started when appropriate conditions are detected, the tight pressing is stopped after a preset target is reached, and a certain time interval is given, so that more back flower is gathered and the process is repeated. In this way, it can ensure that the fibers are uniformly and moderately compressed, while maintaining good bulkiness, thereby improving the quality of the final product, reducing unnecessary material loss, and realizing a more economical and efficient production process.

[0061] The various embodiments are described in the present specification in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be mutually referred to. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0062] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A back-print pressing system based on gap control, characterized in that: include: Main switch, micro pressure differential switch, compressor, fan, time relay, button and relay; The main switch is used to turn the main power of the system on and off. The micro-differential pressure switch is connected to the upper and lower tubes of the compressor via an air pipe to detect the pressure difference between the upper and lower tubes and close or open within a set pressure difference range. The time relay is used to trigger when the micro-differential pressure switch is in the closed state and open after a preset delay. The working states of the fan and the compressor are controlled by the cooperation of the button and the relay.

2. The gap-controlled back-stitch pressing system according to claim 1, characterized in that: Also includes: A maintenance switch is used to isolate the control power supply for maintenance.

3. The gap-controlled back-stitch pressing system according to claim 1, characterized in that: When the fan is in the suction state, the cotton accumulates more and the negative pressure of the lower tube decreases while the negative pressure of the upper tube remains unchanged, the pressure difference between the upper tube and the lower tube increases, and the micro-pressure difference switch detects that the pressure difference reaches the set value, and the micro-pressure difference switch closes.

4. The gap-controlled back-stitch pressing system according to claim 1, characterized in that: The relay comprises: a first relay, a second relay, and a third relay; Wherein, the normally open main contact of the first relay is connected to the fan; The normally open main contact of the second relay is connected to the compressor; The normally open main contact of the third relay is connected in parallel with the normally open main contact of the second relay.

5. The gap-controlled back-stitch pressing system according to claim 4 is characterized in that: The main switch comprises: a first main switch, a second main switch, and a third main switch; One side of the main contact of the first main switch is connected to the three-phase power supply, and the other side of the main contact of the first main switch is connected to the normally open main contact of the first relay; one side of the main contact of the second main switch is connected to the three-phase power supply, and the other side of the main contact of the second main switch is connected to the normally open main contact of the second relay and the normally open main contact of the third relay; The normally open auxiliary contact of the third main switch is connected in series with the normally open auxiliary contact of the first main switch and the normally open auxiliary contact of the second main switch.

6. The gap-controlled back-stitch pressing system according to claim 5, characterized in that: The buttons include: a first normally closed button, a second normally open button, a third normally closed button, a fourth normally open button, and a fifth normally closed button; The first normally closed button and the second normally open button are connected in series and then connected to the coil of the first relay, and the coil of the first relay is connected to the normally open auxiliary contact of the second main switch; the second normally open button is connected in parallel with the first normally open auxiliary contact of the first relay, for controlling the start and stop of the fan; The third normally closed button, the fourth normally open button, and the normally closed auxiliary contact of the third relay are connected in series and connected to the coil of the second relay, and the coil of the second relay is connected to the normally open auxiliary contact of the second main switch, for controlling the forward or reverse rotation of the compressor; The fifth normally closed button is connected in series with the normally open interlocking contact of the third normally closed button, the normally closed interlocking contact of the fourth normally open button, and the normally closed auxiliary contact of the second relay and then connected to the coil of the third relay. The coil of the third relay and the normally open auxiliary contact of the second main switch are used to control the stop of the compressor.

7. The gap-controlled back-stitch pressing system according to claim 6, characterized in that: The coil of the time relay is connected to the normally open contact of the micro-pressure differential switch, and the normally open contact of the time relay is connected in parallel with the normally open linkage contact of the third normally closed button.

8. The gap-controlled back-stitch pressing system according to claim 7, characterized in that: It also includes a maintenance switch, the normally open contact of the maintenance switch is connected in parallel with the second normally open auxiliary contact of the first relay, and the normally closed linkage contact of the maintenance switch is connected to the control power supply.

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