Ultra-wide-angle industrial endoscope for float glass tin bath

Abstract

The present invention belongs to the technical field of float glass, and discloses an ultra-wide-angle industrial endoscope applied to a float glass tin bath, comprising a protective cover with an observation hole at the front end and a peeping mechanism arranged in the protective cover; the length of the protective cover is 80-100 cm; the peeping mechanism comprises a rotating assembly and a camera assembled at the observation hole position in the protective cover through the rotating assembly. Based on the camera rotation scanning working mode, the present invention applies the short endoscope structure to the float glass tin bath, and optimizes the structure at the observation hole of the protective cover, so that the horizontal viewing angle of the present invention is Φ≥110°, and two edge drawing machines can be monitored without blind spots and in all directions at the same time, effectively solving the disadvantages of the existing external scope and long endoscope when used on the float glass production line, such as small horizontal viewing angle range, easy to appear monitoring blind spots, easy to interfere with the swing angle of the edge drawing machine, easy to form tin ash, easy to cause large heat loss, etc.

Description

Technical Field

[0001] The invention belongs to the technical field of float glass and relates to a high-temperature industrial video camera, in particular to an ultra-wide-angle industrial endoscope applied to a float glass tin bath. Background Art

[0002] The tin bath is an important forming thermal equipment in float glass production. After the molten glass in the melting furnace flows into the tin bath, it is flattened and thinned under the control of multiple pairs of edge drawing machines 2, and then cooled to form glass of specific thickness and width. In actual production, the position and operation of the edge drawing machine head 3 are usually monitored by high-temperature industrial televisions. At present, high-temperature industrial televisions mainly include two forms: external scope 4 and long endoscope 5, but both have certain defects, as follows:

[0003] 1. External viewing mirror 4 (working end located outside the tin bath breast wall 1)

[0004] like Figure 1 As shown, in most cases, the external viewing scope 4 is installed on the tin bath edge seal. Due to the size of the edge seal and the structure of the protective cover, the horizontal viewing angle α of the external viewing scope 4 is 1 <30°. The defects of this type of exoscope 4 are:

[0005] First, horizontal viewing angle α 1 Each edge drawing machine 2 in the float glass production line needs to be equipped with an external viewing mirror 4, but the number of edge drawing machines 2 in the float glass production line is large and the intervals are small, especially in the small-scale float glass production line, it is difficult to provide sufficient installation positions for the external viewing mirror 4; moreover, the installation of a large number of external viewing mirrors 4 increases the heat dissipation and oxygen permeation to a certain extent, which will accelerate the deterioration of the atmosphere in the tin bath in the long run and affect the molding quality of the glass.

[0006] Second, horizontal viewing angle α 1 There is a monitoring blind spot. Figure 1 As shown, according to production needs, when the edge drawing machine head 3 swings within the extension range of 50 to 200 cm (swing angle β≤40°), the edge drawing machine head 3 sometimes leaves the monitoring range of the endoscope 4, and there is a certain monitoring blind spot; moreover, the edge drawing machine head 3 is basically located directly in front of the lens of the endoscope 4, and can only provide the staff with monitoring under a single perspective, resulting in the staff sometimes being unable to accurately judge the position of the edge drawing machine 2, being insensitive to the width change of the glass at the edge of the tin bath, and being unable to clearly observe the overlap of the indentations of the edge drawing machine 2, which increases the difficulty of the staff's plate modification operation to a certain extent. For safety reasons, the edge of the glass is usually made wider, which seriously reduces the yield rate.

[0007] 2. Long endoscope 5 (working end located inside the tin bath)

[0008] like Figure 2 As shown, the long endoscope 5 extends into the tin bath through the mounting hole on the edge seal or the breast wall 1 of the tin bath, and the length is usually in the range of 200 to 500 cm. The lens hole is arranged in the radial direction of the front end of the protective cover of the long endoscope 5. Due to the limitation of the protective cover structure, the horizontal viewing angle α of the long endoscope 5 2 <60°. According to production needs, when the edge drawing machine head 3 swings within the range of 50-200 cm (swing angle β≤40°), the long endoscope 5 can also move forward and backward to keep one or more edge drawing machine heads 3 within its monitoring range. The defects of this long endoscope 5 are:

[0009] First, it is easy to interfere with the swing angle of the edge drawing machine 2. Since the long endoscope 5 is long overall, it is possible for the edge drawing machine 2 to collide with the long endoscope 5 when it swings, especially on a float glass production line where the edge drawing machines 2 are very close to each other, the interference problem between the edge drawing machine 2 and the long endoscope 5 is more serious. Of course, in order to avoid interference and collision, the long endoscope 5 can also be installed on the tin bath breast wall 1 using a swingable hanger, but in addition to being expensive, there is not enough space on the float glass production line where the edge drawing machines 2 are very close to each other to install a large-sized long endoscope 5 hanger.

[0010] Second, it is easy to cause greater heat loss. The existing long endoscope 5 is usually 200 to 500 cm long, and circulating water cooling is required during operation to avoid damage to the camera. Therefore, the long endoscope 5 inserted into the tin bath is equivalent to a cooler. Even if an insulation layer is added to the outside of the protective cover, the tin bath will cause greater heat loss. This causes the edge temperature to drop during glass production. Even if the electric heating device on the edge of the tin bath is turned on, it will make it difficult to shape the edge of the glass, reducing the yield rate and increasing energy consumption.

[0011] Third, it is easy to condense tin ash. The part of the long endoscope 5 that extends into the tin bath is long and has a low temperature. Tin ash (tin oxide) is very easy to condense on its surface and lens hole. In order to ensure a good monitoring state, the long endoscope 5 needs to be pulled out of the tin bath for cleaning frequently. Therefore, the temperature inside the tin bath changes frequently, and oxygen penetrates into the tin bath. In addition, the loose but uncleaned tin ash is easy to fall onto the glass plate surface to form defects, which seriously affects the molding quality of the glass and causes production losses. Summary of the invention

[0012] In order to solve the above deficiencies in the prior art, the present invention aims to provide an ultra-wide-angle industrial endoscope applied to float glass tin bath, so as to increase the monitoring viewing angle range, shorten the overall length, avoid interfering with the swing angle of the edge drawing machine, and reduce heat loss.

[0013] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an ultra-wide-angle industrial endoscope applied to a float glass tin bath, comprising a protective cover with an observation hole at the front end and a peeping mechanism arranged in the protective cover; the length of the protective cover is 80 to 100 cm; the peeping mechanism comprises a rotating assembly and a camera assembled at the observation hole position in the protective cover through the rotating assembly.

[0014] As a limitation of the present invention, the front end surface of the protective cover provided with the observation hole is an inclined surface, and a frame-type dust cover extending upward from the opening of the observation hole is fixedly provided on the front end surface.

[0015] As another limitation of the present invention, the image sensor in the camera is a rectangular CCD image sensor; and the observation hole is a quadrangular pyramid shape adapted to the rectangular CCD image sensor.

[0016] As a further limitation of the present invention, the rotating assembly includes a motor fixed in a protective cover, and a rotating shaft drivingly connected to a power output end of the motor; the rotating shaft is arranged in a radial direction of the protective cover, and the camera is mounted on the rotating shaft.

[0017] As a further limitation of the present invention, the power output end of the motor is connected to the rotating shaft through a synchronous belt transmission.

[0018] As another limitation of the present invention, the protective cover is an air-water cooling protective cover;

[0019] A cooling water circulation cavity is provided in the side wall of the protective sleeve, and a water inlet and a water outlet connected to the cooling water circulation cavity are provided on the rear end side wall;

[0020] An air inlet communicating with the inner space of the protective cover is also provided on the side wall at the rear end of the protective cover.

[0021] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0022] (1) The horizontal viewing angle Φ is larger and the monitoring range is wider. The camera in the present invention is changed from the previous fixed alignment with the center of the observation hole to the radial rotation scanning along the protective cover, thereby doubling the horizontal viewing angle of the endoscope, eliminating the monitoring blind spot, and also realizing multi-angle monitoring of the edge drawing machine, so that the staff can more accurately determine the position of the edge drawing machine, more clearly observe the change in the width of the glass at the edge of the tin bath and the overlap of the tooth marks of the edge drawing machine, reducing the difficulty of the plate modification operation.

[0023] Due to the wider monitoring range, the installation position of the device on the breast wall of the tin bath is more flexible, and when in use, there is no need to adjust the extension and horizontal angle accordingly following the swing of the edge drawing machine.

[0024] (2) The protective cover is shorter and will not interfere with the swing angle of the edge drawing machine. The camera's rotating scanning working mode doubles the horizontal viewing angle, which allows the protective cover to be designed to be shorter. The total length of the protective cover in the present invention is 80 to 100 cm, which is 1 / 5 to 1 / 2 of the length of the existing long endoscope. In actual use, the protective cover only needs to penetrate about 10 cm into the tin bath to meet the demand. Therefore, even if there is tin ash that falls off, it is difficult to fall onto the qualified glass plate surface to form defects. In addition, compared with the existing long endoscope, the cooling amount is reduced by more than 80%, which reduces heat loss, is extremely beneficial to the edge forming of float glass, and effectively improves the quality of the product; and the maximum length of the remaining part of the protective cover is about 45 cm. Even if it is used in a float glass production line with a very small spacing between edge drawing machines, it will not interfere with the swing angle of the edge drawing machine.

[0025] (3) Install a frame-type dust cover to prevent dust from accumulating on the lens. The observation hole in the present invention is arranged on the front inclined surface of the protective cover, so that a dust cover can be installed at the observation hole of the protective cover to prevent tin ash from adhering, thereby delaying the accumulation of tin ash in the observation hole and extending the time interval for cleaning the tin ash, which is beneficial to protecting the atmosphere in the tin bath, improving product quality and reducing maintenance workload. (The existing long endoscope observation holes are all opened in the radial direction of the protective cover. If a dust cover is added, an annular protrusion will be formed on the outside of the protective cover, which will affect the sealing effect of the tin bath edge seal on the one hand, and it will also be difficult to pull the protective cover out of the tin bath to clean the tin ash on the other hand.)

[0026] (4) The observation hole has a small opening area and a small amount of protective gas. The observation hole in the present invention is changed from the previous truncated cone type (circular trumpet mouth) to a quadrangular cone type (rectangular trumpet mouth), which is more suitable for the rectangular CCD image sensor in the camera, and realizes the maximum utilization of the opening area of ​​the observation hole. That is, without affecting the horizontal viewing angle α of the camera, the opening area of ​​the observation hole is appropriately reduced, thereby reducing the amount of protective gas used, which provides the possibility of using a small amount of protective gas on the protective cover of a small-diameter endoscope to achieve a large horizontal viewing angle.

[0027] like Figure 3 As shown in the figure, the circular double-dotted line represents the opening size of the truncated cone observation hole at the same horizontal viewing angle. It can be seen intuitively that for the rectangular CCD image sensor in the camera, a large part of the opening of the truncated cone observation hole before the improvement is invalid.

[0028] In summary, based on the camera rotation scanning working mode, the present invention applies the short endoscope structure to the float glass tin bath, and optimizes the structure of the protective cover observation hole, effectively solving the various disadvantages of the existing external scope and long endoscope when used on the float glass production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Figure 1 It is a schematic diagram of the installation structure of the exoscopic scope of the background technology of the present invention;

[0031] Figure 2 It is a schematic diagram of the endoscope installation structure of the background technology of the present invention;

[0032] Figure 3 A schematic diagram comparing the opening areas of the quadrangular cone-shaped observation hole of the present invention and the conventional truncated cone-shaped observation hole;

[0033] Figure 4 It is a schematic diagram of the installation structure of an embodiment of the present invention;

[0034] Figure 5 is a schematic cross-sectional structural diagram of an embodiment of the present invention;

[0035] Figure 6 Schematic diagram of the observation hole structure of an embodiment of the present invention; wherein, Figure 6 a is the cross-sectional view of the observation hole, Figure 6 b is a schematic diagram of the three-dimensional structure of the observation hole;

[0036] In the figure: 1. tin bath breast wall; 2. edge drawing machine; 3. edge drawing machine head; 4. external scope; 5. long endoscope; 6. short endoscope; 7. observation hole; 8. protective cover; 9. cooling water circulation chamber; 10. water outlet; 11. water inlet; 12. air inlet; 13. camera; 14. synchronous belt; 15. motor; 16. wire tube; 17. frame-type dust cover. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0038] Example: An ultra-wide-angle industrial endoscope used in float glass tin bath

[0039] like Figure 4 As shown, the present embodiment is a short endoscope 6 with a front end face having a certain inclination angle. After installation, the front end only extends into the interior of the tin bath by about 10 cm, and innovatively adopts a quadrangular pyramid observation hole 7 and a rotating scanning working mode of the camera 13, so that the horizontal viewing angle Φ of the present embodiment is ≥110°, thereby realizing all-round monitoring of the two edge drawing machines 2 without blind spots.

[0040] Specifically, this embodiment includes a protective cover 8 with an observation hole 7 at the front end and a peep mechanism disposed inside the protective cover 8. The protective cover 8 is an air-water cooling protective cover, which can ensure that the peep mechanism is not damaged by high temperature by air cooling and water cooling. Figure 5As shown, a cooling water circulation chamber 9 is provided in the side wall of the protective cover 8, and a water inlet 11 and a water outlet 10 connected to the cooling water circulation chamber 9 are correspondingly provided at the rear end. An air inlet 12 connected to the internal space of the protective cover 8 is also provided on the side wall at the rear end of the protective cover 8. When working, the protective gas enters from the air inlet 12 and flows out from the observation hole 7, which can effectively prevent the external hot gas from damaging the peeping device in the protective cover 8.

[0041] Furthermore, the protective cover 8 in this embodiment is 80 to 100 cm long, preferably 90 cm long. Figure 5 As shown, the front end surface of the protective cover 8 with the observation hole 7 is an inclined surface, and the front end surface is fixedly provided with a frame-type dust cover 17. In this embodiment, the observation hole 7 provided on the front end surface of the protective cover 8 is a quadrangular pyramid shape.

[0042] The frame-type dust cover 17 is made of a high temperature resistant material and is used to delay the formation of tin ash in the observation hole 7. The high temperature resistant material can be any one of high temperature resistant stainless steel, graphite or high temperature resistant ceramics. Figure 6 a and Figure 6 As shown in FIG. 1 , the frame dust cover 17 is fixedly installed on the front face of the protective cover 8 by bolts, and is concentric with the opening of the observation hole 7. After installation, the frame dust cover 17 can cover the edge of the opening of the observation hole 7 and extend to the top of the opening of the observation hole 7. It should be supplemented here that the frame dust cover 17 in this embodiment is made of high-temperature resistant stainless steel, and because the frame dust cover 17 is fixed to the protective cover 8 by bolts, it is not an integrated structure with the protective cover 8, so the water cooling structure in the protective cover 8 has little effect on the frame dust cover 17. The surface temperature of the frame dust cover 17 can reach 1000°C during operation. (Tin ash easily adheres to the surface of objects with low temperatures, and tin ash is not easy to adhere to the high-temperature surface of the frame dust cover 17.)

[0043] The viewing mechanism can be connected to an external display screen to provide the staff with an internal image of the tin bath. Figure 5 As shown, the peep mechanism includes a rotating assembly, and a camera 13 assembled in the protective cover 8 and located at the observation hole 7 through the rotating assembly. Specifically, the rotating assembly includes a motor 15 (preferably a DC reduction motor) fixed in the protective cover 8, and a rotating shaft connected to the power output end of the motor 15. In this embodiment, the rotating shaft is located in the radial direction of the protective cover 8, and is connected to the power output end of the motor 15 through a synchronous belt 14. The camera 13 is assembled on the rotating shaft, and with the cooperation of the motor 15 and the rotating shaft, the lens of the camera 13 can rotate and scan along the radial direction of the protective cover 8 at the observation hole 7.

[0044] It should be noted that the image sensor in the camera 13 of this embodiment is a rectangular CCD image sensor that is more suitable for the quadrangular pyramid observation hole 7. In addition, the circuits of the camera 13, the motor 15 and other electrical components involved in this embodiment extend out of the rear end of the protective cover 8 through the wire tube 16 in the protective cover 8 and are connected to the external electrical components.

[0045] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ultra-wide-angle industrial endoscope used for float glass tin bath, comprising a protective cover with an observation hole at the front end and a peeping mechanism arranged in the protective cover; characterized in that: The length of the protective cover is 80 to 100 cm; the peep mechanism includes a rotating assembly and a camera mounted at the observation hole in the protective cover through the rotating assembly; The rotating assembly includes a motor fixed in the protective cover, and a rotating shaft drivingly connected to the power output end of the motor; the rotating shaft is arranged in the radial direction of the protective cover, and the camera is mounted on the rotating shaft; The front end surface of the protective cover provided with the observation hole is an inclined surface, and a frame-type dust cover extending above the opening of the observation hole is fixedly provided on the front end surface; The frame-type dust cover is made of high-temperature resistant material, which is any one of high-temperature resistant stainless steel, graphite or high-temperature resistant ceramics; the frame-type dust cover is fixed on the front end surface of the protective cover by bolts, concentric with the opening of the observation hole, and after installation, the frame-type dust cover can cover the edge of the observation hole opening and extend above the observation hole opening.

2. The ultra-wide-angle industrial endoscope for use in float glass tin bath according to claim 1, characterized in that: The image sensor in the camera is a rectangular CCD image sensor; the observation hole is a quadrangular pyramid type adapted to the rectangular CCD image sensor.

3. The ultra-wide-angle industrial endoscope used for float glass tin bath according to claim 2 is characterized in that: The power output end of the motor is connected to the rotating shaft through a synchronous belt transmission.

4. The ultra-wide-angle industrial endoscope for use in float glass tin bath according to any one of claims 1 to 3, characterized in that: The protective cover is a wind and water cooling protective cover; A cooling water circulation cavity is provided in the side wall of the protective sleeve, and a water inlet and a water outlet connected to the cooling water circulation cavity are provided on the rear end side wall; An air inlet communicating with the inner space of the protective cover is also provided on the side wall at the rear end of the protective cover.

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