Telescopic furnace body cover plate device

Abstract

The utility model relates to a telescopic furnace body cover plate device, which is arranged on a furnace body and comprises an organ cover, a cover plate and a cover plate, the bottom of the organ cover communicates with a furnace opening of the furnace body. The adjustable fixing device is arranged at the top of the organ cover and used for fixing the organ cover and adjusting the position of a top connector of the organ cover, so that the top connector and the bottom connector of the organ cover are located at the same center; the ceramic sealing ring is arranged on the adjustable fixing device and is used for sealing the organ cover; the stretching driving mechanism is connected with the adjustable fixing device and used for controlling the organ cover to be unfolded and folded; the diameter measuring instrument and the light supplementing lamp are installed on the two sides of the organ cover through a support. According to the utility model, the organ cover is used for replacing a top long cylinder piece, and when the furnace body moves to the position above the tower, the stretching driving mechanism controls the length of the organ cover to be reduced, so that the furnace body can move upwards again until the mother rod is stretched, the movable range of the furnace body is increased, and the height of the tower is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber preform manufacturing, in particular to a telescopic furnace cover device. Background Art

[0002] The common process of optical fiber preform is generally divided into two steps. The first is to use VAD deposition technology to manufacture a thicker diameter optical fiber preform core rod. Since the diameter of the sintered core rod is large and uneven at this time, it is necessary to stretch the core rod into a thinner and uniform diameter core rod through a stretching process. After passing the test, the rods are welded at both ends of the core rod and then undergo OVD deposition and sintering processes to form a finished optical fiber preform. Therefore, the core rod stretching process in the process plays a bottleneck role. At present, the core rod stretching furnace used in the production workshop of most optical rod enterprises mostly adopts a top-fixed long tube structure, which limits the core rod stretching capacity of the equipment. The furnace body moves during the stretching process. If the stretched mother rod is long, the furnace body will move upward more to complete the mother rod stretching. If the tower height is not enough, even if the furnace body moves to the top position, it cannot meet the stretching length; and there is no integrated device for measuring the core rod diameter on the furnace cover. Most stretching equipment uses a diameter gauge installed in the middle of the furnace body. In this way, when the furnace body temperature rises, the diameter gauge will also become very high due to radiant heat, which affects the life of equipment components and increases production costs. Utility Model Content

[0003] To this end, the technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a retractable furnace cover device, in which the top long cylinder is replaced by an accordion cover. When the furnace body moves to above the tower, the stretching drive mechanism controls the length of the accordion cover to decrease, so that the furnace body can move upward again until the mother rod is stretched, thereby increasing the movable range of the furnace body and helping to reduce the height of the tower.

[0004] In order to solve the above technical problems, the utility model provides a retractable furnace cover device, which is arranged on the furnace body and includes:

[0005] The accordion cover is a retractable sealing sleeve; the bottom of the accordion cover is connected to the furnace opening of the furnace body;

[0006] An adjustable fixing device, arranged at the top of the accordion cover, used to fix the accordion cover and adjust the position of the top interface of the accordion cover so that the interface at the top of the accordion cover and the interface at the bottom are at the same center;

[0007] A ceramic sealing ring, arranged on the adjustable fixing device and used for sealing the accordion cover;

[0008] A stretching drive mechanism, connected to the adjustable fixing device, for controlling the expansion and contraction of the accordion cover;

[0009] The caliper and the fill light are installed on both sides of the accordion cover through brackets.

[0010] In one embodiment of the utility model, a water cooling device is further included. The water cooling device is arranged at the furnace mouth on the top of the furnace body and is used to cool the furnace body. A supporting weldment is provided between the water cooling device and the furnace body.

[0011] In one embodiment of the utility model, an air sealing ring is provided between the accordion cover and the furnace body, and the air sealing ring is used to blow nitrogen obliquely downward so that the interior of the furnace body is filled with nitrogen and external oxygen cannot enter the furnace body from the furnace mouth.

[0012] In one embodiment of the utility model, the stretching drive mechanism includes a first support plate, an electric cylinder, a linear slide rail, a lifting plate and a lifting plate, the electric cylinder is arranged on the support frame of the furnace body, the first support plate is fixedly arranged on the support frame, the linear slide rail is arranged on the first support plate, the lifting plate is slidably connected to the linear slide rail, the lifting plate is connected to the lifting plate, and the driving end of the electric cylinder is connected to the lifting plate.

[0013] In one embodiment of the utility model, an electronic distance sensor is provided on the lifting plate to detect the distance between the lifting plate and the clamping device on the top of the tower when the furnace body is raised.

[0014] In one embodiment of the utility model, the adjustable fixing device includes a second support plate, a locking ring, an X-direction adjustment plate, a Y-direction adjustment plate, an X-direction adjustment bolt mechanism and a Y-direction adjustment bolt mechanism; the Y-direction adjustment plate and the X-direction adjustment plate are stacked up and down, the locking ring is embedded in the Y-direction adjustment plate and the X-direction adjustment plate, and the locking ring is locked to the top of the accordion cover by a throat clamp; the X-direction adjustment bolt mechanism is arranged between the X-direction adjustment plate and the Y-direction adjustment plate, and the Y-direction adjustment bolt mechanism is arranged between the Y-direction adjustment plate and the second support plate.

[0015] In one embodiment of the utility model, a mechanical limit contact switch is provided on the second support plate. When the furnace body rises to the point where the mechanical limit contact switch contacts the clamping device above the tower, the mechanical limit contact switch sends a signal to stop the furnace body from moving.

[0016] In one embodiment of the utility model, the X-axis adjustment plate is provided with a plurality of strip holes along the X-axis direction, the X-axis adjustment plate is position-adjusted along the X-axis direction on the second support plate, and the X-axis adjustment plate is fixed to the second support plate by fixing bolts extending into the strip holes.

[0017] In one embodiment of the utility model, the Y-axis adjustment plate is provided with a plurality of strip holes along the Y-axis direction, the Y-axis adjustment plate is position-adjusted on the X-axis adjustment plate along the Y-axis direction, and the Y-axis adjustment plate is fixed to the X-axis adjustment plate by fixing bolts extending into the strip holes.

[0018] In an embodiment of the present invention, the X-axis adjustment bolt mechanism and the Y-axis adjustment bolt mechanism have the same structure, both comprising an adjustment block 1, an adjustment block 2 and an adjustment bolt, and the adjustment bolt is threadedly connected to the adjustment block 1 and the adjustment block 2.

[0019] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0020] The utility model discloses a retractable furnace cover device, which can make the accordion cover become retractable when the core rod is stretched, thereby increasing the movable range of the furnace body and reducing the height of the tower; when the accordion cover is contracted to the shortest distance, the clamping device on the upper end of the rod body is clamped and immobilized; when the furnace body moves, the diameter gauge probe will also move with the furnace body, so that the overall diameter distribution of the rod body can be scanned in real time, and the moving speed of the furnace body during the stretching process can be calculated from the mother rod diameter, so that the core rod of the target diameter can be accurately stretched. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0022] Figure 1 It is a schematic structural diagram of the accordion cover of the retractable furnace cover device in the preferred embodiment of the utility model being opened;

[0023] Figure 2 yes Figure 1 A schematic diagram of the structure of the retractable furnace cover device with the accordion cover retracted;

[0024] Figure 3 It is a comparison diagram of the top distances of the accordion cover when the furnace body moves to the same height;

[0025] Figure 4 yes Figure 1 A schematic structural diagram of an adjustable fixing device of a retractable furnace cover device shown;

[0026] Figure 5 yes Figure 4 A schematic structural diagram of the adjusting bolt mechanism of the adjustable fixing device shown.

[0027] Figure 6 yes Figure 1 A schematic structural diagram of the gas sealing ring of the retractable furnace cover device shown;

[0028] Figure 7 yes Figure 1 A schematic structural diagram of a water cooling device of a retractable furnace cover device shown;

[0029] Explanation of the reference numerals in the drawings in the specification: 1. furnace body; 2. accordion cover; 3. adjustable fixing device; 4. ceramic sealing ring; 5. stretching drive mechanism; 6. diameter gauge; 7. fill light; 8. bracket; 9. water cooling device; 10. support weldment; 11. air sealing ring; 12. support frame; 13. electronic distance sensor; 14. mechanical limit contact switch; 31. second support plate; 32. locking ring; 33. X-axis adjustment plate; 34. Y-axis adjustment plate; 35 adjustment bolt mechanism; 51. first support plate; 52. electric cylinder; 53. linear slide rail; 54. lifting plate; 55. lifting plate; 100. tower; 101. chuck device. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0031] Reference Figure 1-2 As shown, the utility model provides a retractable furnace cover device, which is arranged on the furnace body 1, and includes: an accordion cover 2, which is a retractable sealing sleeve; the bottom of the accordion cover 2 is connected to the furnace mouth of the furnace body 1; an adjustable fixing device 3, which is arranged on the top of the accordion cover 2, and is used to fix the accordion cover 2 and adjust the position of the top interface of the accordion cover 2, so that the interface at the top of the accordion cover 2 and the interface at the bottom are in the same center; a ceramic sealing ring 4, which is arranged on the adjustable fixing device 3 and is used to seal the accordion cover 2; a stretching drive mechanism 5, which is connected to the adjustable fixing device 3, and is used to control the expansion and contraction of the accordion cover 2; a caliper 6 and a fill light 7, which are installed on both sides of the accordion cover 2 through a bracket 8; the caliper 6 is used to scan the diameter of the core rod mother rod; the fill light 7 is used to fill light to the caliper 6 to avoid affecting the accuracy of data detection of the caliper 6.

[0032] Furthermore, a water cooling device 9 is included, which is arranged at the furnace mouth on the top of the furnace body 1 and is used to cool the furnace body 1, and a supporting weldment 10 is arranged between the water cooling device 9 and the furnace body 1. The water cooling device 9 can absorb the heat emitted by the furnace body 1 and increase the service life of the accordion cover 2.

[0033] Furthermore, an air sealing ring 11 is provided between the accordion cover 2 and the furnace body 1, and the air sealing ring 11 is used to blow nitrogen obliquely downward so that the interior of the furnace body 1 is filled with nitrogen and external oxygen cannot enter the furnace body from the furnace mouth, thereby increasing the service life of the internal graphite parts.

[0034] The stretching drive mechanism 5 includes a first support plate 51, an electric cylinder 52, a linear slide rail 53 and a lifting plate 54, wherein the electric cylinder 52 is arranged on the support frame 12 of the furnace body 1, the first support plate 51 is fixedly arranged on the support frame 12, the linear slide rail 53 is arranged on the first support plate 51, the lifting plate 54 is slidably connected to the linear slide rail 53, the lifting plate 55 is connected to the lifting plate 54, and the driving end of the electric cylinder 52 is connected to the adjustable fixing device 3. The electric cylinder 52 drives the lifting plate 55 to rise and fall, and the lifting plate 54 slides smoothly up and down along the linear slide rail 53.

[0035] In this embodiment, the lifting plate 54 is provided with an electronic distance sensor 13, which is used to detect the distance between the lifting plate and the clamping device 101 on the top of the tower 100 when the furnace body 1 is raised. When the furnace body 1 is raised, the electronic distance sensor 13 senses that the lifting plate 54 is at a certain distance from the clamping device 101 above, and then the control system will make the electric cylinder 52 drop, the accordion cover 2 shrink, and the furnace body 1 can continue to rise for a distance.

[0036] like Figure 3 As shown, when the furnace body 1 moves to the same height, after the accordion cover 2 is retracted, the furnace body 1 can continue to move up a certain distance until the mother rod is stretched. Under the original height condition of the tower 100, the movable range of the furnace body 1 is increased.

[0037] like Figure 4 As shown, the adjustable fixing device 3 includes a second support plate 31, a locking ring 32, an X-axis adjustment plate 33, a Y-axis adjustment plate 34, an X-axis adjustment bolt mechanism 35 and a Y-axis adjustment bolt mechanism 36; the Y-axis adjustment plate 34 and the X-axis adjustment plate 33 are stacked up and down, the locking ring 32 is embedded in the Y-axis adjustment plate 34 and the X-axis adjustment plate 33, and the locking ring 32 is locked with the top of the accordion cover 2 by a throat clamp; the X-axis adjustment bolt mechanism 35 is arranged between the X-axis adjustment plate 33 and the Y-axis adjustment plate 34, and the Y-axis adjustment bolt mechanism 36 is arranged between the Y-axis adjustment plate 34 and the second support plate 31.

[0038] Preferably, the X-axis adjustment plate 33 is provided with a plurality of strip holes along the X-axis direction, the X-axis adjustment plate 33 is position-adjusted on the second support plate 31 along the X-axis direction, and the X-axis adjustment plate 33 is fixed to the second support plate 31 by fixing bolts extending into the strip holes.

[0039] The Y-adjustment plate 34 is provided with a plurality of strip holes along the Y-axis direction. The Y-adjustment plate 34 is position-adjusted on the X-adjustment plate 33 along the Y-axis direction, and the Y-adjustment plate 34 is fixed to the X-adjustment plate 33 by fixing bolts extending into the strip holes.

[0040] like Figure 5 As shown, the X-axis adjustment bolt mechanism 35 and the Y-axis adjustment bolt mechanism 36 have the same structure, and both include an adjustment block 1 351, an adjustment block 2 352 and an adjustment bolt 353, and the adjustment bolt 353 is threadedly connected with the adjustment block 1 351 and the adjustment block 2 352;

[0041] Among them, the adjustment block 1 351 of the X-axis adjustment bolt mechanism 35 is set on the X-axis adjustment plate 33, and the adjustment block 2 352 of the X-axis adjustment bolt mechanism 35 is set on the Y-axis adjustment plate 34. By rotating the adjustment bolt 353, the distance between the adjustment block 1 351 and the adjustment block 2 352 is achieved, thereby realizing the position adjustment of the accordion cover 2 in the X-axis direction.

[0042] The adjustment block 1 351 of the Y-axis adjustment bolt mechanism 36 is arranged on the Y-axis adjustment plate 33, and the adjustment block 2 352 of the Y-axis adjustment bolt mechanism 36 is arranged on the second support plate 31. By rotating the adjustment bolt 353, the distance between the adjustment block 1 351 and the adjustment block 2 352 is achieved, thereby achieving the position adjustment of the accordion cover 2 in the Y-axis direction.

[0043] When the accordion cover 2 is offset from the center of the furnace body 1 , the adjustment bolts 353 are adjusted to control the movement of the X-axis adjustment plate 33 and the Y-axis adjustment plate 34 , so that the interface at the top and the bottom of the accordion cover 2 are at the same center.

[0044] In this embodiment, a mechanical limit contact switch 14 is provided on the second support plate 31. When the furnace body 1 rises to the point where the mechanical limit contact switch 14 contacts the clamping device 101 above the tower 100, the mechanical limit contact switch 14 sends a signal to stop the movement of the furnace body 1. If some parts of the machine fail, the furnace body 1 will continue to rise and hit the clamping device 101 above the tower 100. When the furnace body 1 rises to the point where the mechanical limit contact switch 14 contacts the clamping device 101 above the tower 100, a signal is sent to stop the movement of the furnace body 1, thereby avoiding safety accidents caused by damage to the limit position of the electric cylinder 52.

[0045] Based on the retractable furnace cover device of the above structure, the accordion cover 2 is made of high-temperature resistant retractable material with a temperature resistance of more than 300°C. The opening and contraction of the accordion cover 2 is driven by the electric cylinder 52. The motor used by the electric cylinder 52 is a servo motor, which can be accurately positioned. When the motor rotates one turn, the electric cylinder 52 rises 10mm, so the displacement of the opening and contraction of the accordion cover 2 can be accurately controlled. When the accordion cover 2 is contracted to the shortest distance, the rod body is clamped by the chuck device 101 and does not move. When the furnace body 1 moves, the probe of the diameter gauge 6 fixed on the bracket 8 will also move with the furnace body 1, so that the overall diameter distribution of the rod body can be scanned in real time. The moving speed of the furnace body 1 during the stretching process is calculated by the mother rod diameter through a computer, and the core rod of the target diameter can be accurately stretched.

[0046] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A retractable furnace cover device, arranged on a furnace body, characterized in that: include: The accordion cover is a retractable sealing sleeve; the bottom of the accordion cover is connected to the furnace opening of the furnace body; An adjustable fixing device, arranged at the top of the accordion cover, used to fix the accordion cover and adjust the position of the top interface of the accordion cover so that the interface at the top of the accordion cover and the interface at the bottom are at the same center; A ceramic sealing ring, arranged on the adjustable fixing device and used for sealing the accordion cover; A stretching drive mechanism, connected to the adjustable fixing device, for controlling the expansion and contraction of the accordion cover; The caliper and the fill light are installed on both sides of the accordion cover through brackets.

2. A retractable furnace cover device according to claim 1, characterized in that: It also includes a water cooling device, which is arranged at the furnace mouth on the top of the furnace body and is used to cool the furnace body, and a supporting weldment is provided between the water cooling device and the furnace body.

3. The retractable furnace cover device according to claim 1, characterized in that: An air sealing ring is provided between the accordion cover and the furnace body, and the air sealing ring is used to blow nitrogen obliquely downward so that the interior of the furnace body is filled with nitrogen and external oxygen cannot enter the furnace body from the furnace opening.

4. The retractable furnace cover device according to claim 1, characterized in that: The stretching drive mechanism includes a first support plate, an electric cylinder, a linear slide rail, a lifting plate and a lifting plate. The electric cylinder is arranged on the support frame of the furnace body, the first support plate is fixedly arranged on the support frame, the linear slide rail is arranged on the first support plate, the lifting plate is slidably connected to the linear slide rail, the lifting plate is connected to the lifting plate, and the driving end of the electric cylinder is connected to the lifting plate.

5. A retractable furnace cover device according to claim 4, characterized in that: The lifting plate is provided with an electronic distance sensor for detecting the distance between the lifting plate and the clamping device at the top of the tower when the furnace body is raised.

6. The retractable furnace cover device according to claim 1, characterized in that: The adjustable fixing device includes a second support plate, a locking ring, an X-direction adjustment plate, a Y-direction adjustment plate, an X-direction adjustment bolt mechanism and a Y-direction adjustment bolt mechanism; the Y-direction adjustment plate and the X-direction adjustment plate are stacked up and down, the locking ring is embedded in the Y-direction adjustment plate and the X-direction adjustment plate, and the locking ring is locked with the top of the accordion cover by a throat clamp; the X-direction adjustment bolt mechanism is arranged between the X-direction adjustment plate and the Y-direction adjustment plate, and the Y-direction adjustment bolt mechanism is arranged between the Y-direction adjustment plate and the second support plate.

7. The retractable furnace cover device according to claim 6, characterized in that: A mechanical limit contact switch is provided on the second supporting plate. When the furnace body rises to the point where the mechanical limit contact switch contacts the clamping device above the tower, the mechanical limit contact switch sends a signal to stop the furnace body from moving.

8. The retractable furnace cover device according to claim 6, characterized in that: The X-axis adjustment plate is provided with a plurality of strip holes along the X-axis direction. The X-axis adjustment plate is positionally adjusted on the second support plate along the X-axis direction, and the X-axis adjustment plate is fixed to the second support plate by fixing bolts extending into the strip holes.

9. The retractable furnace cover device according to claim 8, characterized in that: The Y-adjustment plate is provided with a plurality of strip holes along the Y-axis direction. The Y-adjustment plate is positionally adjusted on the X-adjustment plate along the Y-axis direction, and the Y-adjustment plate is fixed to the X-adjustment plate by fixing bolts extending into the strip holes.

10. The retractable furnace cover device according to claim 9, characterized in that: The X-axis adjusting bolt mechanism and the Y-axis adjusting bolt mechanism have the same structure, both comprising an adjusting block 1, an adjusting block 2 and an adjusting bolt, and the adjusting bolt is threadedly connected with the adjusting block 1 and the adjusting block 2.

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