CN108946053B

CN108946053B - Sizing material conveying line and sizing material conveying method

Info

Publication number: CN108946053B
Application number: CN201810923240.7A
Authority: CN
Inventors: 周宏建; 邓卫平; 段忠福
Original assignee: SBT Engineering Systems Co Ltd
Current assignee: Shanghai Jiaocheng Ultrasonic Technology Co.,Ltd.
Priority date: 2018-08-14
Filing date: 2018-08-14
Publication date: 2021-06-01
Anticipated expiration: 2038-08-14
Also published as: CN108946053A

Abstract

The invention aims to provide a sizing material conveying line, which can remove metal foreign matters in a non-stop state so as to improve the production efficiency of a production line. The invention also aims to provide a sizing material conveying method which uses the sizing material conveying line. For realizing the sizing material transfer chain of aforementioned purpose, including the automatic station of rejecting of foreign matter, and the automatic transmission band of rejecting the two independent operations that the station downstream side set up of foreign matter is in two be provided with buffer memory device between the transmission band, buffer memory device includes the buffer memory space buffer memory sizing material of conveying between two transmission bands in the buffer memory space. The rubber compound conveying method for achieving the aforementioned object is characterized in that the downstream-side conveying belt continues to feed the subsequent process with the buffer rubber compound while the upstream-side conveying belt is halted.

Description

Sizing material conveying line and sizing material conveying method

Technical Field

The invention relates to a sizing material conveying line and a sizing material conveying method.

Background

On a production and transportation line of the sizing material, whether the long-strip-shaped sizing material is heavy with metal foreign bodies needs to be detected. In the existing sizing production line, metal detection equipment such as a metal detector and a handheld metal detector is generally used for detecting metal foreign matters. Because the metal detector cannot accurately position the position of the metal foreign matter and only can determine the approximate area where the metal foreign matter is located, the existing method for removing the metal foreign matter generally comprises the steps of firstly detecting the metal foreign matter in the sizing material by the metal detector, then alarming and stopping the machine, then further accurately positioning the position of the foreign matter by a manual handheld technical detector, and manually removing the foreign matter.

Another mode for detecting metal foreign matters in the existing rubber production and transportation line is to use an X-ray detection system and a foreign matter automatic removing mechanism, wherein the X-ray detection system can accurately position the metal foreign matters in the production line, and then the automatic removing mechanism stops the production line according to the metal foreign matter coordinates provided by the X-ray detection system. After the metal foreign bodies are removed by the automatic removing mechanism in a mode of punching holes on the rubber material, the production line continues to run.

However, the inventors have found that the conventional rubber compound production line and the conventional rubber compound production method have the disadvantage that the production line needs to be stopped when foreign matters are removed, and the production efficiency is affected.

Disclosure of Invention

The invention aims to provide a sizing material conveying line, which can remove metal foreign matters in a non-stop state so as to improve the production efficiency of a production line.

The invention also aims to provide a sizing material conveying method which uses the sizing material conveying line.

For realizing the sizing material transfer chain of aforementioned purpose, reject the station including the foreign matter is automatic, its characterized in that still includes the automatic transmission band of rejecting the two independent operations that the station downstream side set up of foreign matter is two be provided with buffer memory device between the transmission band, buffer memory device includes the buffer memory space buffer memory sizing material of conveying between two transmission bands in the buffer memory space.

In one or more embodiments, the buffer device further includes a first glue detecting device, which is arranged for a first detecting area of the buffer space and configured to detect whether the buffer glue enters the first detecting area;

the sizing material conveying line further comprises a control system, and the control system controls the rotating speed of the upstream side conveying belt of the two conveying belts according to the output signal of the first sizing material detection device so as to adjust the lowest position of the cached sizing material to the first detection area.

In one or more embodiments, the caching apparatus further includes:

the second sizing material detection device is arranged aiming at a second detection area of the cache space and used for detecting whether the cache sizing material enters the second detection area, the second detection area is higher than the first detection area, and a first height difference exists between the second detection area and the first detection area;

when the control system receives a signal that the second sizing material detection device cannot detect the cached sizing material, the control system controls the rotating speed of the upstream side conveying belt of the two conveying belts according to the output signals of the first sizing material detection device and the second sizing material detection device so as to adjust the rotating speed of the upstream side conveying belt to the rotating speed of the downstream side conveying belt.

In one or more embodiments, the caching apparatus further includes:

the third sizing material detection device is arranged for a third detection area of the cache space and is used for detecting whether the cache sizing material is in progress or not, the third detection area is lower than the first detection area, and a second height difference exists between the third detection area and the first detection area;

when the control system receives a signal that the third sizing material detection device outputs and detects the cached sizing material, the control system controls the rotating speed of the upstream side conveying belt of the two conveying belts according to the output signals of the third sizing material detection device and the first sizing material detection device so as to adjust the rotating speed of the upstream side conveying belt to the rotating speed of the downstream side conveying belt.

In one or more embodiments, when the control system receives a signal from the third size detection device that no size is detected and receives a signal from the second size detection device that the buffered size is detected, the control system controls the rotation speed of the upstream-side conveyor belt based on the output signal from the first size detection device to adjust the lowest position of the buffered size to the first detection zone.

In one or more embodiments, the first, second, and/or third size detection devices are photoelectric detection devices.

In one or more embodiments, the sizing material conveying line further comprises a foreign matter detection device, and the control system sends out a system alarm signal according to the signal output by the foreign matter detection device and the signal output by the second sizing material detection device that the sizing material is not detected, and instructs the two conveying belts to stop.

In order to achieve the purpose, the rubber conveying method is provided with a foreign matter automatic eliminating station and is characterized in that two conveying belts which run independently are arranged on the downstream side of the foreign matter automatic eliminating station, buffer memory devices are arranged on the two conveying belts, a buffer memory space is arranged in the buffer memory devices, buffer memory rubber with a certain length between the two conveying belts is buffered in the buffer memory space, and when the conveying belt on the upstream side is suspended, the conveying belt on the downstream side still uses the buffer memory rubber to continuously feed materials to the subsequent processes.

In one or more embodiments, the glue stock conveying method detects whether the buffer glue stock enters a first detection area of the buffer space by using a first glue stock detection device;

when it is detected that the buffer size enters the first detection area, the speed of the upstream-side conveyor belt is decreased, and when it is detected that the buffer size does not enter the first detection area, the speed of the upstream-side conveyor belt is increased to adjust the lowest position of the buffer size to the first detection area.

In one or more embodiments, the glue stock conveying method detects whether the cached glue stock enters a second detection area of the cache space by using a second glue stock detection device, wherein the second detection area is higher than the first detection area and has a first height difference with the first detection area;

when the second sizing material detection device cannot detect the cached sizing material, the rotating speed of the upstream side conveying belt is increased so that the second sizing material detection device can detect the cached sizing material, and the rotating speed of the upstream side conveying belt is adjusted to the rotating speed of the downstream side conveying belt until the first sizing material detection device detects the cached sizing material.

In one or more embodiments, the glue conveying method detects whether the buffer glue is in progress in a third detection area of the buffer space by using a third glue detection device, wherein the third detection area is lower than the first detection area and has a second height difference with the first detection area;

when the third sizing material detection device detects the cached sizing material, the rotation of the upstream side conveying belt is slowed down or stopped so that the third sizing material detection device cannot detect the cached sizing material, and the rotation speed of the upstream side conveying belt is adjusted to the rotation speed of the downstream side conveying belt until the first sizing material detection device cannot detect the cached sizing material.

In one or more embodiments, when the third size detection device does not detect size and the second size detection device detects the buffer size, the speed of the upstream-side conveyor belt is decreased if it is detected that the buffer size enters the first detection zone, and the speed of the upstream-side conveyor belt is increased if it is detected that the buffer size does not enter the first detection zone, so as to adjust the lowest position of the buffer size to the first detection zone.

In one or more embodiments, when the presence of foreign matter in the glue is detected and the second glue detection device does not detect glue, a system alarm signal is sent out and the rotation of the two conveyor belts is stopped.

The invention has the beneficial effects that: the utility model provides a sizing material transfer chain and sizing material conveying method, it includes two transmission belts of independent setting and sets up the buffer memory mechanism in the middle of two transmission belts, and it can reject the metallic foreign matter under the state that guarantees that the production line is not all shut down to improve production efficiency.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of one embodiment of a sizing conveyor line.

FIG. 2 is a schematic view of another embodiment of a sizing conveyor line.

FIG. 3 is a schematic flow diagram of one embodiment of a method of size conveying.

FIG. 4 is a schematic view of another embodiment of a sizing conveyor line.

FIG. 5 is a schematic flow diagram of another embodiment of a method of size conveying.

FIG. 6 is a schematic view of another embodiment of a sizing conveyor line.

FIG. 7 is a schematic flow diagram of another embodiment of a method of size conveying.

Detailed Description

The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

FIG. 1 illustrates one embodiment of a sizing conveyor line. As shown in fig. 1, the sizing material conveying line includes a conveying belt 11 and a conveying belt 12, and the conveying belt 11 and the conveying belt 12 are respectively driven by a motor 13 and convey the sizing material 4 placed thereon. The conveyor belt 11 is disposed on the upstream side of the conveyor belt 12 and both are operated independently of each other while the two

conveyor belts

11, 12 are spaced apart from each other by a distance. In the parts not shown in the figures, a buffer device is further arranged at the position where the conveyor belt 11 and the conveyor belt 12 are separated, and the buffer device is a buffer space defined by the two

conveyor belts

11 and 12 at intervals or a buffer space defined by a bracket or a rack. The buffer space is filled with the glue 4 buffered between the two

conveyor belts

11, 12. In a part not shown in the figure, the sizing material conveying line further comprises a foreign matter automatic removing station, the conveying belt 11 and the conveying belt 12 are arranged on the downstream side of the foreign matter automatic removing station, a foreign matter detection device for accurately positioning the metal foreign matters is arranged on the foreign matter automatic removing station, and a foreign matter removing device for removing the metal foreign matters in the sizing material is arranged on the foreign matter automatic removing station. When the foreign matter detection device detects that there is metallic foreign matter at the upstream side of transmission band 11, transmission band 11 shuts down, and the metallic foreign matter that foreign matter detection device detected and was fixed a position is rejected to foreign matter rejection equipment simultaneously, and transmission band 12 continues to transmit the sizing material 4 of buffer memory in the buffer memory space and supplies the follow-up procedure operation this moment, and after the foreign matter rejection equipment was rejected and is accomplished, transmission band 11 resumes work. In one embodiment, the foreign material removing apparatus may be a punching machine capable of removing metallic foreign materials by punching the surface of the sizing material 4; the foreign matter detection device may be an X-ray detector.

When the foreign matters are removed, the sizing material conveying line arranged in the mode only needs to stop the conveying belt 11, and the sizing material 4 in the buffer memory space can enable the conveying belt 12 and the downstream process equipment to continue working, so that the efficiency of the production line can not be influenced when the metal foreign matters are removed.

Fig. 2 shows a further embodiment of a glue line, from which fig. 2 the first glue detection device 21 is added to the glue line of fig. 1. The first glue detecting device 21 has a first detection zone 210 located in the buffer space and capable of detecting whether glue 4 buffered in the buffer space enters the first detection zone 210. In a part not shown in the figures, the glue conveyor line further comprises a control system capable of controlling the rotation speed of the upstream one 11 of the two conveyors in accordance with the output signal of the first glue detecting device 21, so as to adjust the lowest position of the glue 4 buffered in the buffer space into the first detection zone 210.

When the first sizing material detecting device 21 detects that the sizing material 4 buffered in the buffer space does not enter the first detecting area 210, the control system sends a signal and controls the output power of the motor in the transmission belt 11 to increase the transmission speed of the transmission belt 11, until the sizing material 4 enters the first detecting area 210, the control system sends a signal again and controls the motor 13 in the transmission belt 11, so that the transmission speed of the transmission belt 11 is reduced and the initial state is recovered. This may be repeated so that the amount of buffer of size 4 buffered in the buffer space can be maintained in the first inspection area 210.

Fig. 3 shows an embodiment of the method for size conveying, which is described in detail below with reference to fig. 2 and 3. The conveying speed of the conveying belt 11 on the upstream side is v1, and the maximum conveying speed of the conveying belt 12 on the downstream side is v2 max. When the sizing material conveying line is powered on, the speed v1 is set to be the same as v2max, the conveying belt 11 and the conveying belt 12 run at the same time, and the controller adjusts the size v1 according to the feedback signal of the first sizing material detection device 21: when the first size detecting device 21 detects the entry of size 4 into the first detection area 210, v1 is multiplied by 0.99 every second, thereby gradually decreasing v 1; when the first glue detecting device 21 does not detect that glue 4 enters the first detection zone 210, v1 is multiplied by 1.01 every second, so that v1 is gradually increased, and this is repeated, so that it is ensured that the lowest position of glue 4 in the buffer space is always kept in the first detection zone 210.

Fig. 4 shows another embodiment of the glue line, from which fig. 4 a second glue detecting device 22 is added to the glue line of fig. 2. The second glue detecting device 22 has a second detection zone 220 located in the buffer space and capable of detecting whether glue 4 buffered in the buffer space enters the second detection zone 220. Wherein the second glue detecting device 22 is arranged higher than the first glue detecting device 21 such that the second detecting area 220 is higher than the first detecting area 210, i.e. the second detecting area 220 is closer to the conveyor belt 11 and the conveyor belt 12 than the first detecting area 210, while a first height difference L1 exists between the second detecting area 220 and the first detecting area 210.

When the control system receives a signal that the second sizing material detection device 22 does not detect that the sizing material 4 enters the second detection area 220, the controller controls and increases the transmission speed of the upstream side transmission belt 11 until the first sizing material detection device 21 detects that the sizing material 4 buffered in the buffer space enters the first detection area 210, and the controller controls and adjusts the transmission speed of the transmission belt 11 to be the same as the transmission speed of the transmission belt 12, so that the buffer amount of the sizing material 4 in the buffer space can be kept between the second detection area 220 and the first detection area 210.

Fig. 5 shows another embodiment of the method for conveying size material, the steps of which are specifically described below by means of fig. 4 and 5 in combination. The conveying speed of the conveying belt 11 on the upstream side is v1, and the maximum conveying speed of the conveying belt 12 on the downstream side is v2 max. When the sizing material conveying line is powered on, the speed v1 is set to be the same as v2max, the conveying belt 11 and the conveying belt 12 run simultaneously, and at the moment, if the second sizing material detecting device 22 detects that the sizing material 4 enters the second detecting area 220, the controller adjusts the size v1 according to the feedback of the first sizing material detecting device 21: when the first size detecting device 21 detects the entry of size 4 into the first detection area 210, v1 is multiplied by 0.99 every second, thereby gradually decreasing v 1; when the first glue detecting device 21 does not detect that glue 4 enters the first detection zone 210, v1 is multiplied by 1.01 every second, so that v1 is gradually increased, and this is repeated, so that the lowest position of glue 4 in the buffer space is always kept between the second detection zone 220 and the first detection zone 210.

If the second glue detecting device 22 does not detect that glue 4 enters the second detection area 220, v1 is set to be twice v2max, so as to rapidly increase the conveying speed of the conveyor belt 11 until the second glue detecting device 22 detects that glue 4 enters the second detection area 220, the controller records the time t1, and then the conveyor belt 11 continues to convey at twice v2max until the first glue detecting device 21 detects that glue 4 enters the first detection area 210, the controller records the time t2, and the v1 is set as: "v 1 ═ 2 × v2max-2 × L1/(t2-t 1)", so that the speed of the conveyance belt 11 is set to be the same as the speed of the conveyance belt 12. Thereafter the controller continues to adjust the magnitude of v1 based on the feedback signal from the first size detecting device 21: when the first size detecting device 21 detects the entry of size 4 into the first detection area 210, v1 is multiplied by 0.99 every second, thereby gradually decreasing v 1; when the first glue detecting device 21 does not detect that glue 4 enters the first detection zone 210, v1 is multiplied by 1.01 every second, so that v1 is gradually increased, and this is repeated, so that the lowest position of glue 4 in the buffer space is always kept between the second detection zone 220 and the first detection zone 210.

Fig. 6 shows another embodiment of the glue line, from which fig. 6 a third glue detection device 23 is added to the glue line of fig. 4. The third glue detecting device 23 has a third detection zone 230 located in the buffer space, which is capable of detecting whether glue 4 buffered in the buffer space has entered the third detection zone 230. Wherein the third glue detecting device 23 is arranged below the first glue detecting device 21 in the buffer device close to the stock limit of the buffer area, so that the third detection area 230 is below the first detection area 210, i.e. the first detection area 210 is closer to the transport belt 11 and the transport belt 12 than the third detection area 230, while a second height difference L2 exists between the third detection area 230 and the first detection area 210.

When the control system receives a signal that the third glue detecting device 23 outputs and detects that the glue 4 enters the third detecting area 230, the controller controls and increases the transmission speed of the upstream side transmission belt 11 until the first glue detecting device 21 detects that the glue 4 buffered in the buffer space enters the first detecting area 210, the controller controls and adjusts the transmission speed of the transmission belt 11 to be the same as the transmission speed of the transmission belt 12, and therefore the buffer amount of the glue 4 in the buffer space can be guaranteed not to exceed the storage limit of the buffer device. If the controller receives the signal sent by the third rubber compound detecting device 23 that the rubber compound 4 is not detected and simultaneously receives the signal sent by the second rubber compound detecting device 22 that the rubber compound 4 is detected, the control system adjusts the conveying speed of the upstream side conveying belt 11 according to whether the first rubber compound detecting device detects the signal of the rubber compound 4, when the rubber compound 4 is detected to enter the first detecting area 210, the speed of the upstream side conveying belt 11 is reduced, and if the rubber compound 4 is detected not to enter the first detecting area 210, the speed of the upstream side conveying belt 11 is increased, so that the lowest position of the cached rubber compound can be guaranteed to be adjusted to the first detecting area.

Fig. 7 shows another embodiment of the size conveying method, which will be described in detail below by means of fig. 6 and 7 in conjunction, wherein the conveying speed of the conveyor belt 11 on the upstream side is v1 and the maximum conveying speed of the conveyor belt 12 on the downstream side is v2 max. When the sizing material conveying line is powered on, the v1 speed is set to be the same as v2max, and the conveying

belts

11 and 12 run simultaneously. At this time, if the third glue detecting device 23 does not detect that the glue 4 enters the third detecting area 230, and at the same time the second glue detecting device 22 detects that the glue 4 enters the second detecting area 220, the controller adjusts the magnitude of v1 according to the feedback of the first glue detecting device 21: when the first size detecting device 21 detects the entry of size 4 into the first detection area 210, v1 is multiplied by 0.99 every second, thereby gradually decreasing v 1; when the first glue detecting device 21 does not detect that glue 4 enters the first detection zone 210, v1 is multiplied by 1.01 every second, so that v1 is gradually increased, and this is repeated, so that the lowest position of glue 4 in the buffer space is always kept between the second detection zone 220 and the first detection zone 210.

If the third glue detecting device 23 does not detect that glue 4 enters the third detection zone 230 and at the same time the second glue detecting device 22 does not detect that glue 4 enters the second detection zone 220, v1 is set to be twice v2max to rapidly increase the transport speed of the transport belt 11 until the second glue detecting device 22 detects that glue 4 enters the second detection zone 220, the controller records the time t1, and subsequently the transport belt 11 continues to transport at twice v2max until the first glue detecting device 21 detects that glue 4 enters the first detection zone 210, the controller records the time t2 and sets the magnitude of v1 to: "v 1 ═ 2 × v2max-2 × L1/(t2-t 1)", so that the speed of the conveyance belt 11 is set to be the same as the speed of the conveyance belt 12. Thereafter the controller continues to adjust the magnitude of v1 based on the feedback signal from the first size detecting device 21: when the first size detecting device 21 detects the entry of size 4 into the first detection area 210, v1 is multiplied by 0.99 every second, thereby gradually decreasing v 1; when the first glue detecting device 21 does not detect that glue 4 enters the first detection zone 210, v1 is multiplied by 1.01 every second, so that v1 is gradually increased, and this is repeated, so that the lowest position of glue 4 in the buffer space is always kept between the second detection zone 220 and the first detection zone 210.

If the third glue detecting device 23 detects that glue 4 enters the third detection area 230, the transport of the transport belt 11 will be stopped, at which point v1 is 0, until the lowest part of the glue 4 leaves the third detection area 230, the controller registers the time t3, and the transport belt 11 continues to stop transport until the lowest part of the glue 4 leaves the first detection area 210, the controller registers the time t4, and at the same time the magnitude of v1 is set to: "v 1 ═ 2 × L2/(t4-t 3)", so as to set the speed of the conveyor belt 11 to be the same as the speed of the conveyor belt 12, after which the controller continues to adjust the magnitude of v1 in accordance with the feedback signal of the first size detecting device 21: when the first size detecting device 21 detects the entry of size 4 into the first detection area 210, v1 is multiplied by 0.99 every second, thereby gradually decreasing v 1; when the first glue detecting device 21 does not detect the entrance of glue 4 into the first detection zone 210, v1 is multiplied by 1.01 every second, so that v1 is gradually increased, which repeatedly ensures that the lowest position of glue 4 in the buffer space is always maintained between the second detection zone 220 and the first detection zone 210, while preventing the lowest position of glue 4 in the buffer space from exceeding the limit position of the buffer device.

In one embodiment, the first, second and third glue

material detection devices

21, 22, 23 are a photo detection device comprising a photo emitter and a photo receiver, and when glue material 4 enters between the photo emitter and the photo receiver, the photo detection device outputs a signal to the controller due to the obstruction between the photo emitter and the photo receiver, so that the controller can determine whether glue material 4 enters the first, second or

third detection area

210, 220, 230 according to the signal. In another embodiment, the first, second and third

glue detecting devices

21, 22, 23 may also be a proximity switch.

In one embodiment, the maximum transport speed v2max of the transport belt 12 is 0.5 m/s, the first height difference L1 between the second detection area 220 and the first detection area 210 is set to be 1.25 m or more, and the transport belt 11 needs to be stopped for 5 seconds per removal of a foreign object, so that it can be ensured that a removal stop time of 5 seconds on the transport belt 11 can be satisfied as long as the glue 4 is present in the second detection area 220.

In one embodiment, when the glue stock conveying line shown in fig. 1 to 4 outputs a signal that no glue stock 4 is detected at the second glue stock detecting device 22 and the foreign matter detecting device detects that foreign matter exists in the glue stock, the controller may send a system alarm signal according to the signal sent by the foreign matter detecting device and instruct the two conveying

belts

11 and 12 to stop, so as to prevent the conveying belt 12 from idling in the case that the automatic removing device cannot complete all removing even when the glue stock 4 in the buffer space is completely consumed due to continuous occurrence of a plurality of foreign matters.

In one embodiment, the maximum transport speed v2max of the transport belt 12 is 0.5 m/s, the transport belt 11 needs to be stopped for 5 seconds per removal of one foreign object, and the first height difference L1 between the second detection area 220 and the first detection area 210 is set to be 3.25 m or more, so that it can be ensured that three foreign object removal stop times can be continuously removed on the transport belt 11 as long as the glue 4 is present in the second detection area 220.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims

1. The rubber conveying line comprises a foreign matter automatic eliminating station and is characterized by further comprising two conveying belts which run independently and are arranged on the downstream side of the foreign matter automatic eliminating station, the two conveying belts are separated by a certain distance to allow a buffer memory device to be arranged between the two conveying belts, the buffer memory device comprises a buffer memory space, and buffer memory rubber conveyed between the two conveying belts is buffered in the buffer memory space;

the cache device further comprises:

the first sizing material detection device is arranged aiming at a first detection area of the cache space and used for detecting whether the cache sizing material enters the first detection area;

the second sizing material detection device is arranged aiming at a second detection area of the cache space and used for detecting whether the cache sizing material enters the second detection area, the second detection area is higher than the first detection area, and a first height difference exists between the second detection area and the first detection area; and

the third sizing material detection device is arranged aiming at a third detection area of the cache space and used for detecting whether the cache sizing material enters the third detection area, the third detection area is lower than the first detection area, and a second height difference exists between the third detection area and the first detection area;

when the control system receives a signal that the third sizing material detection device outputs and detects the cached sizing material, the control system controls the rotating speed of the upstream side conveying belt of the two conveying belts according to the output signals of the third sizing material detection device and the first sizing material detection device so as to adjust the rotating speed of the upstream side conveying belt to the rotating speed of the downstream side conveying belt;

when the control system receives the signal that the third sizing material detection device outputs no sizing material detection and receives the signal that the second sizing material detection device outputs the buffered sizing material detection, the control system controls the rotating speed of the upstream side conveying belt according to the output signal of the first sizing material detection device so as to adjust the lowest position of the buffered sizing device to the first detection area;

when the control system receives the signal that the third sizing material detection device outputs no sizing material detection and receives the signal that the second sizing material detection device outputs no sizing material detection, the control system controls the rotating speed of the upstream side conveying belt of the two conveying belts according to the output signals of the first sizing material detection device and the second sizing material detection device so as to adjust the rotating speed of the upstream side conveying belt to the rotating speed of the downstream side conveying belt.

2. Sizing material transfer line according to claim 1, characterised in that the first, second and/or third sizing material detection device is a photoelectric detection device.

3. The sizing material conveying line according to claim 1 or 2, further comprising a foreign matter detection device, wherein the control system sends a system alarm signal and instructs both the conveying belts to stop according to the signal output by the foreign matter detection device that foreign matter is detected and the signal output by the second sizing material detection device that sizing material is not detected.

4. A sizing material conveying method is provided with a foreign matter automatic eliminating station and is characterized in that two conveying belts which run independently are arranged on the downstream side of the foreign matter automatic eliminating station, the two conveying belts are separated by a certain distance to allow the two conveying belts to be provided with a buffer memory device, a buffer memory space is arranged in the buffer memory device, buffer memory sizing material with a certain length between the two conveying belts is buffered in the buffer memory space, and when the upstream side conveying belt is suspended, the downstream side conveying belt still uses the buffer memory sizing material to continuously feed materials to subsequent processes;

the method further comprises the following steps:

detecting whether the cache sizing material enters a first detection area of the cache space by using a first sizing material detection device;

detecting whether the cache sizing material enters a second detection area of the cache space by using a second sizing material detection device, wherein the second detection area is higher than the first detection area and has a first height difference with the first detection area;

detecting whether the cache sizing material enters a third detection area of the cache space by using a third sizing material detection device, wherein the third detection area is lower than the first detection area and has a second height difference with the first detection area;

when the third sizing material detection device detects the cached sizing material, the rotation of the upstream side conveying belt is slowed down or stopped so that the third sizing material detection device cannot detect the cached sizing material, and the rotation speed of the upstream side conveying belt is adjusted to the rotation speed of the downstream side conveying belt until the first sizing material detection device cannot detect the cached sizing material;

when the third sizing material detection device does not detect sizing material and the second sizing material detection device does not detect the cached sizing material, increasing the rotating speed of the upstream side conveying belt to enable the second sizing material detection device to detect the cached sizing material, and adjusting the rotating speed of the upstream side conveying belt to the rotating speed of the downstream side conveying belt until the first sizing material detection device detects the cached sizing material;

when the third sizing material detection device does not detect sizing material and the second sizing material detection device detects the cached sizing material, if the cached sizing material is detected to enter the first detection area, the speed of the upstream side conveyor belt is reduced, and if the cached sizing material is detected not to enter the first detection area, the speed of the upstream side conveyor belt is increased, so that the lowest position of the cached sizing material is adjusted to the first detection area.

5. The stock conveying method of claim 4, wherein when a foreign object is detected in the stock and the second stock detecting device does not detect the stock, a system alarm is issued and rotation of both of the conveyor belts is stopped.