System for automatically measuring width of glass tape

Abstract

The utility model discloses a system for automatically measuring the width of a glass tape, which is characterized in that a tin bath allows the glass tape to flow, the outer side of the front end of the tin bath in the width direction is provided with a head-butt edge-joining machine and a tail-butt edge-joining machine, the two sides of the tin bath in the width direction at the rear end of the tail-butt edge-joining machine are provided with edge-blocking devices, and the width of the edge-blocking devices is controlled through edge-blocking device supporting rods; the edge blocking device supporting rod comprises a left supporting rod and a right supporting rod, the left supporting rod and the right supporting rod are connected with the two sides of the edge blocking device respectively, automatic measuring instruments are arranged on the left supporting rod and the right supporting rod respectively, the tail end of the tin bath is connected with an annealing kiln, and a slag box is arranged between the tin bath and the annealing kiln. The outlet end plate width measuring devices are arranged on the two sides of the front end of the annealing kiln in the width direction, the automatic measuring instrument and the outlet end plate width measuring devices exchange data with the central control room, and the technical problems that in the prior art, measured values are not accurate in the plate changing process, measurement time lag is too long, and consequently the yield loss in the plate changing process is large are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass production, and in particular relates to a system for automatically measuring the width of a glass ribbon. Background Art

[0002] To meet market demands, float glass production requires frequent changes in product thickness and original sheet width (referred to as "re-sheeting"). If the glass ribbon thickness and / or original sheet width do not meet product requirements during the re-sheeting process, it will be discarded as scrap. Therefore, timely data on the glass ribbon width in the tin bath is essential to adjust the parameters and drawing speed of the forming equipment (edge drawing machine) to shorten the re-sheeting time and minimize production losses during the re-sheeting process.

[0003] The current method for obtaining glass ribbon width data is to insert a steel member into the gap between the slag box behind the tin bath outlet and the annealing furnace entrance to contact the edge of the glass ribbon. The width of the glass ribbon is calculated by measuring the length of the member inserted. This method has the following problems:

[0004] (1) The measurement of the plate width is delayed, and the waiting time is long. The distance between the end-to-end edge drawing machine and the plate width measurement position is about 40m (longer for large production lines). From the completion of the plate changing operation to the measurement of the plate width data, it usually takes 5-10 minutes due to the different specifications and thicknesses of the products produced.

[0005] (2) The operation is inconvenient and time-consuming.

[0006] (3) Reading or calculation errors are prone to occur. In actual production, reading errors or manual calculation errors often occur, which prolongs the plate modification process and increases production losses. Sometimes, it even causes the glass thickness or original plate width to fail to meet the standards for a long time after the plate modification, resulting in huge production losses.

[0007] (4) Due to the high noise level at the operation site, the control room commander is prone to mishearing and affecting judgment when listening to the on-site operator's report on the plate width detection data.

[0008] (5) There is a risk of glass ribbon breakage and plate breaking. The temperature of the steel components in the plate width measuring device at the tin bath outlet is low. When it comes into contact with the high-temperature glass ribbon, it will cause rapid cooling, which can easily cause cracks on the edge of the glass ribbon, and then cause the glass ribbon to break, resulting in production loss. Utility Model Content

[0009] The purpose of the utility model is to provide a system for automatically measuring the width of a glass ribbon, so as to solve the technical problems in the prior art of inaccurate measurement values and long measurement time lag during the plate changing process, which result in great production loss during the plate changing process.

[0010] The technical solution adopted by the utility model to solve its technical problems is:

[0011] A system for automatically measuring the width of a glass ribbon comprises: a tin bath, wherein the tin bath is for the glass ribbon to flow, a first butt joint machine and a last butt joint machine are provided on the outer side in the width direction of the front end of the tin bath, and side guards are provided on both sides of the width direction of the tin bath at the rear end of the last butt joint machine, and the side guards are controlled in width by side guard support rods, the side guard support rods comprise a left support rod and a right support rod, the left support rod and the right support rod are respectively connected to both sides of the side guard, and automatic measuring instruments are provided on the left support rod and the right support rod, an annealing furnace is connected to the end of the tin bath, a slag box is provided between the tin bath and the annealing furnace, and outlet end plate width measuring devices are provided on both sides of the front end of the annealing furnace in the width direction, and the automatic measuring instrument and the outlet end plate width measuring device exchange data with a central control room.

[0012] The utility model provides a system for automatically measuring the width of a glass ribbon. The distance between the edge retainer support rod and the end-jointing edge machine is 5-8m.

[0013] The utility model provides a system for automatically measuring the width of a glass ribbon. The automatic measuring instrument is a displacement sensor or a laser distance measuring device.

[0014] The utility model provides a system for automatically measuring the width of a glass ribbon. The central control room is provided with a data display device.

[0015] The beneficial effects of the present invention are as follows: a system for automatically measuring the width of a glass ribbon is proposed, wherein the plate width detection point is moved forward to the middle section of the tin bath, and the plate width detection device is integrated with the edge retainer support rod. An automatic distance measuring element is integrated on the support rod. When the plate changing operator completes the adjustment of the edge retainer in and out, the plate width is automatically detected and transmitted to the central control room for display, eliminating the need for dedicated personnel on duty and manual plate width measurement. By integrating the automatic distance measuring element on the edge retainer support rod, the number of plate changing operators is reduced, operational efficiency is improved, the timeliness and accuracy of plate width detection are improved, and errors caused by manual reading and calculation are avoided. Moreover, by locating the plate width measuring device formed by the edge retainer support rod with the automatic distance measuring element at a position 5-8 meters away from the end of the edge drawing machine, the delay is only 1-2 minutes, which is 4-8 minutes shorter than the existing technology, and can significantly reduce the production loss in the plate changing process, especially in the production of special ultra-thick large-sized glass products. At the same time, by arranging the middle detection device and the plate width measuring device at the outlet end for comparison, the final data can be reconfirmed to prevent errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 It is a schematic diagram of an embodiment of the present utility model;

[0018] Figure 2It is a calculation principle diagram of an embodiment of the utility model;

[0019] Figure 3 It is a calculation block diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all the embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] like Figure 1-3 As shown, a system for automatically measuring the width of a glass ribbon comprises: a tin bath 1, wherein the tin bath 1 is for a glass ribbon 6 to flow, and a first butt joint machine 3 and a last butt joint machine 9 are provided on the outer side of the front end width direction of the tin bath 1, and side guards are provided on both sides of the width direction of the tin bath 1 at the rear end of the last butt joint machine 9, and the side guards are controlled in width by side guard support rods 4, and the side guard support rods 4 comprise a left support rod 41 and a right support rod 42, and the left support rod 41 and the right support rod 42 are respectively connected to the two sides of the side guard, and automatic measuring instruments are provided on the left support rod 41 and the right support rod 42, and an annealing furnace 2 is connected to the end of the tin bath 1, and a slag box 7 is provided between the tin bath 1 and the annealing furnace 2, and outlet end plate width measuring devices 5 are provided on both sides of the front end width direction of the annealing furnace 2, and the automatic measuring instrument and the outlet end plate width measuring device 5 exchange data with the central control room 8.

[0022] It should be noted that conventional side guards are made of graphite. Side guard support rods 4 push against the specially designed graphite components, limiting the left-right swing of the glass ribbon 6. In this application, automatic distance measurement devices, such as displacement sensors and laser rangefinders, are installed on the side guard support rods 4 of the graphite side guards. The rangefinder data is transmitted to the DCS system in the central control room 8, where it is processed and displayed as the current width of the glass ribbon 6 and the predicted final original sheet width.

[0023] Since the temperature of the glass ribbon at the graphite edge guard is relatively high, the glass ribbon will shrink to a certain extent when being pulled to the tin bath outlet, which can be calibrated by comparing with the final original plate width data.

[0024] In a preferred embodiment of the present invention, the distance between the edge retainer support rod 4 and the end-jointed edge machine 9 is 5-8 m.

[0025] In a preferred embodiment of the present invention, the automatic measuring instrument is a displacement sensor or a laser distance measuring device.

[0026] In a preferred embodiment of the present invention, the central control room 8 has a data display device.

[0027] Brief description of the calculation process:

[0028] Plate width calculation method and process

[0029] (1) Measurement and calculation of the glass ribbon width B in the tin bath

[0030] The outer width B0 of the tin bath, the length L1 of the left side guard support rod 41, and the length L2 of the right side guard support rod 42 are all known. The distance L between the outer end of the side guard support rod and the tin wall of the tin bath is measured by an automatic distance meter. 11 and L 21 , the distance between the ends of the edge guards can be calculated, which is approximately equal to the width of the glass ribbon at that location.

[0031] from Figure 2 It can be seen that:

[0032] L 12 =L1-L 11 , L 22 =L2-L 21

[0033] B=B0-L 12 -L 22 =B0-(L1-L 11 )-(L2-L 21 )=B0-(L1+L2)+(L 11 +L 21 )

[0034] Because B0, L1, and L2 are all known numbers and their values are fixed, B0-(L1+L2) is also a known quantity and is fixed. Let A=B0-(L1+L2), then B=A+(L 11 +L 21 ).

[0035] When L is measured 11 and L 21 , the glass ribbon width B can be calculated.

[0036] (1) Final width of the glass ribbon (B) E Prediction calculation

[0037] At the edge guard, the glass ribbon shrinkage rate β = (1-final original plate width B E / width of glass strip at edge guard (B) × 100%, from which B E=(1-β)×B.

[0038] Products of various specifications and thicknesses have corresponding shrinkage rates β. Through long-term production practice, each production line has accumulated experience values of corresponding shrinkage rates β. Therefore, when the width B of the glass ribbon at the edge guard is measured, the final glass ribbon width B can be predicted and calculated. E .

[0039] The distance meter outputs a 4-20mA signal corresponding to the actual physical distance from the distance meter to the outer wall of the tin bath. The PLC collects the signal output by the distance meter through the AI module, such as the displacement sensor, and calculates the distance between the distance meter and the outer wall of the tin bath, that is, Figure 2 Medium L 11 and L 21 , according to the pre-designed calculation formula B=A+(L 11 +L 21 ) Calculate the glass ribbon width B, according to B E =(1-β)×B to calculate the final original plate width B E ; The parameters 0-27468 in the PLC correspond to it and are output to the host computer. The host computer recognizes B and B through WINCC E The value is converted and displayed.

[0040] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0042] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to this utility model.

Claims

1. A system for automatically measuring the width of a glass ribbon, characterized in that: include: A tin bath (1) for the glass ribbon (6) to flow, a first butt-joint edge machine (3) and a last butt-joint edge machine (9) are provided on the outer side of the front end width direction of the tin bath (1), side guards are provided on both sides of the width direction of the tin bath (1) at the rear end of the last butt-joint edge machine (9), the side guards are width-controlled by side guard support rods (4), the side guard support rods (4) include a left support rod (41) and a right support rod (42), the left support rod (41) and the right support rod (42) are respectively connected to both sides of the side guard, automatic measuring instruments are provided on both the left support rod (41) and the right support rod (42), an annealing furnace (2) is connected to the end of the tin bath (1), a slag box (7) is provided between the tin bath (1) and the annealing furnace (2), an outlet end plate width measuring device (5) is provided on both sides of the front end width direction of the annealing furnace (2), the automatic measuring instrument and the outlet end plate width measuring device (5) exchange data with a central control room (8).

2. The system for automatically measuring the width of a glass ribbon according to claim 1, wherein: The distance between the edge retainer support rod (4) and the end-jointed edge machine (9) is 5-8m.

3. The system for automatically measuring the width of a glass ribbon according to claim 1, wherein: The automatic measuring instrument is a displacement sensor or a laser distance measuring device.

4. The system for automatically measuring the width of a glass ribbon according to claim 1, wherein: The central control room (8) has a data display device.

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