Sealing structure for diameter-variable position of quartz glass base material

Abstract

The utility model provides a sealing structure of a quartz glass base material reducing position. The sealing structure comprises a heating furnace, a heating cavity is formed in the heating furnace, a feeding port is formed in the top, and a discharging port is formed in the bottom; the feeding mechanism is positioned above the heating furnace; the large-diameter sealing seat is fixedly mounted on the feeding hole, the inner diameter of the large-diameter sealing seat is matched with the large diameter of a quartz glass base material, and quartz wool is arranged at the top of the large-diameter sealing seat; the small-diameter sealing seat is step-shaped and comprises a mounting part with a smaller diameter and a butt joint part with a larger diameter; the mounting part is sleeved on the small diameter; the inner diameter of the butt joint part is relatively larger than the diameter of the large diameter. The large-diameter sealing seat is mounted at the feeding hole of the heating furnace, so that the large-diameter part of a quartz glass base material can be effectively sealed; the small-diameter sealing seat is sleeved on the small-diameter part of the quartz glass base material, so that the small-diameter sealing seat and the small-diameter part can be sealed; when the large diameter of the quartz glass base material completely enters the heating furnace, the small-diameter sealing seat can abut against the large-diameter sealing seat, sealing is further formed, and the problem that the variable diameter cannot be sealed is effectively solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of glass processing, in particular to a sealing structure of a variable-diameter position of a quartz glass parent material. BACKGROUND

[0002] In the production process of a quartz glass tube, a quartz glass parent material is slowly fed into a heating furnace by a feeding mechanism, and is sealed at the upper opening of the heating furnace by a quartz sealing piece. The quartz sealing piece has a middle hole slightly larger than the quartz glass parent material to ensure that the parent material can pass through. However, in order to ensure the utilization rate of the quartz glass parent material, an extension rod is usually installed at the tail end of the quartz glass parent material before processing, so that the quartz glass parent material can be fully utilized. Therefore, a variable diameter is formed at the joint of the quartz glass parent material and the extension rod. When the variable diameter enters the sealing piece at the upper opening of the heating furnace, the hot air in the furnace will be dispersed into the air through the gap due to the reduction of the variable diameter size, resulting in sealing failure, thereby causing the size of the formed tube to be unstable, and even causing the furnace to stop. Therefore, the above problems need to be solved. SUMMARY

[0003] In view of the above defects or deficiencies in the prior art, it is desirable to provide a sealing structure of a variable-diameter position of a quartz glass parent material.

[0004] The application provides a sealing structure of a variable-diameter position of a quartz glass parent material, which comprises

[0005] a heating furnace, an inner part of the heating furnace is provided with a heating cavity, a top part is provided with a feeding port in communication with the heating cavity, and a bottom part is provided with a discharging port coaxial with the feeding port;

[0006] a feeding mechanism, the feeding mechanism is located above the heating furnace and is used for driving the quartz glass parent material to continuously feed;

[0007] a sealing mechanism, the sealing mechanism comprises a large-diameter sealing seat and a small-diameter sealing seat which are movably connected;

[0008] the large-diameter sealing seat is fixedly installed on the feeding port, an inner diameter of the large-diameter sealing seat matches a large diameter of the quartz glass parent material, and a top part of the large-diameter sealing seat is provided with quartz wool;

[0009] the small-diameter sealing seat is in a stepped shape and comprises an installation part with a relatively small diameter and an abutting part with a relatively large diameter;

[0010] an inner diameter of the installation part matches a small diameter of the quartz glass parent material, and the installation part is sleeved on the small diameter;

[0011] an inner diameter of the abutting part is relatively larger than the diameter of the large diameter, and the abutting part is used for abutting against the large-diameter sealing seat.

[0012] Further,

[0013] The inner diameter of the docking portion is relatively larger than the inner diameter of the quartz wool, and the outer diameter of the docking portion is relatively smaller than the outer diameter of the quartz wool, so as to form an abutting seal between the docking portion and the quartz wool.

[0014] Further,

[0015] The feeding mechanism comprises guide rods and driving blocks above the heating furnace.

[0016] The number of the guide rods is not less than two, and the guide rods are parallel to each other.

[0017] The driving blocks are slidably installed on the guide rods, and the sliding direction is parallel to the feeding direction of the quartz glass parent material.

[0018] Further,

[0019] The driving blocks are provided with matching plug-in holes corresponding to the small diameter.

[0020] The driving blocks are further provided with pin holes corresponding to the plug-in holes.

[0021] The pin holes extend along the radial direction of the plug-in holes, and are used for installing penetrating pins.

[0022] The small diameter is provided with matching penetrating holes corresponding to the penetrating pins.

[0023] Further,

[0024] The bottom of the heating furnace is further provided with a traction mechanism.

[0025] The traction mechanism comprises two roller shafts parallel to each other, and the roller shafts are located on both sides of the discharge port.

[0026] The extension direction of the roller shafts is perpendicular to the feeding direction of the quartz glass parent material, and the quartz glass parent material is stretched by the traction mechanism.

[0027] Further,

[0028] The traction speed of the traction mechanism on the quartz glass parent material is relatively larger than the feeding speed of the feeding mechanism on the quartz glass parent material, so as to stretch the quartz glass parent material.

[0029] The application has the following advantages and positive effects:

[0030] The large-diameter sealing seat is installed at the feeding port of the heating furnace, so as to effectively seal the large diameter of the quartz glass parent material. The small-diameter sealing seat is sleeved on the small diameter of the quartz glass parent material, so as to form a seal at the small diameter. When the large diameter of the quartz glass parent material completely enters the heating furnace, the small-diameter sealing seat abuts against the large-diameter sealing seat, and further forms a seal, thereby effectively solving the problem that the variable diameter cannot be sealed. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 A structural schematic diagram of a sealing structure of a variable-diameter position of a quartz glass mother material provided by an embodiment of the present application;

[0032] Fig. 2 A structural schematic diagram of butt sealing of a sealing structure of a variable-diameter position of a quartz glass mother material provided by an embodiment of the present application.

[0033] The text annotations in the figure represent: 100-heating furnace; 110-roller shaft; 200-quartz glass mother material; 300-large-diameter sealing seat; 310-quartz wool; 400-small-diameter sealing seat; 500-guide rod; 510-driving block. DETAILED DESCRIPTION

[0034] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be described in detail below with reference to the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0035] Please refer to Figs. 1-2 The present embodiment provides a sealing structure of a variable-diameter position of a quartz glass mother material, which comprises a heating furnace 100, the inside of the heating furnace 100 is provided with a heating cavity, the top is provided with a feeding port in communication with the heating cavity, and the bottom is provided with a discharging port coaxial with the feeding port; a feeding mechanism, which is located above the heating furnace 100 and is used to drive the quartz glass mother material 200 to continuously feed; a sealing mechanism, which comprises a large-diameter sealing seat 300 and a small-diameter sealing seat 400 in butt joint; the large-diameter sealing seat 300 is fixedly installed on the feeding port, the inner diameter thereof matches the large diameter of the quartz glass mother material 200, and the top is provided with quartz wool 310; the small-diameter sealing seat 400 is in a stepped shape, comprising an installation part with a relatively small diameter and a butt joint part with a relatively large diameter; the inner diameter of the installation part matches the small diameter of the quartz glass mother material 200 and is sleeved on the small diameter; the inner diameter of the butt joint part is relatively larger than the diameter of the large diameter and is used to abut against the large-diameter sealing seat 300.

[0036] In the present embodiment, the inside of the heating furnace 100 is provided with a heating cavity extending in the vertical direction; the feeding port is located at the top of the heating furnace 100 and is coaxial and in communication with the heating cavity; the discharging port is located at the bottom of the heating furnace 100 and is also coaxial and in communication with the heating cavity.

[0037] In the present embodiment, the feeding mechanism is located directly above the heating furnace 100 and is connected with an extension rod connected with the quartz glass mother material, thereby driving the quartz glass mother material to continuously feed into the heating furnace 100.

[0038] In the embodiment, the large-diameter sealing seat 300 is installed on the heating furnace 100 to effectively seal the large diameter of the quartz glass parent material, i.e., the body of the quartz glass parent material; the small-diameter sealing seat 400 is sleeved on the small diameter, i.e., the extension rod, to form a seal between the small-diameter sealing seat 400 and the extension rod; when the large diameter completely passes through the large-diameter sealing seat 300, the small-diameter sealing seat 400 abuts against the large-diameter sealing seat 300 at one end to form a seal, and abuts against the extension rod at the other end to form a seal, so that the heating cavity is still in a sealed cover state.

[0039] In a preferred embodiment, the inner diameter of the butt joint is relatively larger than the inner diameter of the quartz wool 310, and the outer diameter is relatively smaller than the outer diameter of the quartz wool 310, so as to form an abutting seal with the quartz wool 310.

[0040] In a preferred embodiment, the feeding mechanism includes guide rods 500 and a driving block 510 above the heating furnace 100; the number of the guide rods 500 is not less than two, and they are parallel to each other; the driving block 510 is slidably installed on the guide rods 500, and the sliding direction is parallel to the feeding direction of the quartz glass parent material 200.

[0041] In the embodiment, a lead screw is also threadedly installed on the driving block 510; the lead screw and the guide rods 500 are parallel to each other and are driven by a stepping motor, so as to effectively control the driving block 510 to ascend and descend.

[0042] In a preferred embodiment, the driving block 510 is provided with a matching plug-in hole corresponding to the small diameter; the driving block 510 is also provided with a pin hole corresponding to the plug-in hole; the pin hole extends along the radial direction of the plug-in hole and is used to install a penetrating pin; the small diameter is provided with a matching penetrating hole corresponding to the penetrating pin.

[0043] In the embodiment, the driving block 510 is provided with a plug-in hole and a pin hole which are perpendicular to each other and intersect with each other; the plug-in hole is used to plug in the small diameter; the pin hole is used to plug in the penetrating pin; when the small diameter is plugged into the plug-in hole, the penetrating hole on the small diameter is coaxial with the pin hole, so that the small diameter and the driving block 510 can be fixedly connected by plugging in the penetrating pin.

[0044] In a preferred embodiment, the bottom of the heating furnace 100 is also provided with a traction mechanism; the traction mechanism includes two roller shafts 110 which are parallel to each other and are located on both sides of the discharge port; the extension direction of the roller shaft 110 is perpendicular to the feeding direction of the quartz glass parent material 200, and is used to stretch the quartz glass parent material 300.

[0045] In this embodiment, each roller shaft 110 of the chain is located on both sides of the discharge port, thereby clamping the forming tube output from the heating furnace 100. With the rotation of the roller shaft 110, the forming tube can be effectively conveyed.

[0046] In a preferred embodiment, the traction speed of the traction mechanism on the quartz glass mother material 200 is relatively greater than the feeding speed of the feeding mechanism on the quartz glass mother material 200, in order to stretch the quartz glass mother material 200.

[0047] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A sealing structure of a necking position of a quartz glass mother material, characterized by, The utility model relates to a quartz glass parent material diameter changing position sealing structure A heating furnace (100), which is internally provided with a heating cavity, is provided with an inlet on the top and an outlet coaxial with the inlet on the bottom; A feeding mechanism is located above the heating furnace (100) and is used to drive the quartz glass parent material (200) to continuously feed; A sealing mechanism includes movable abutting large-diameter sealing seat (300) and small-diameter sealing seat (400); The large-diameter sealing seat (300) is fixedly installed on the inlet, the inner diameter matches the large diameter of the quartz glass parent material (200), and the top is provided with quartz wool (310); The small-diameter sealing seat (400) is stepped and includes an installation part with a relatively small diameter and an abutting part with a relatively large diameter; The inner diameter of the installation part matches the small diameter of the quartz glass parent material (200) and is sleeved on the small diameter; The inner diameter of the abutting part is relatively larger than the diameter of the large diameter and is used to abut against the large-diameter sealing seat (300).

2. The quartz glass parent material diameter changing position sealing structure according to claim 1, wherein The inner diameter of the abutting part is relatively larger than the inner diameter of the quartz wool (310), and the outer diameter is relatively smaller than the outer diameter of the quartz wool (310), so as to form abutting sealing between the quartz wool (310).

3. The quartz glass parent material diameter changing position sealing structure according to claim 1, wherein The feeding mechanism includes guide rods (500) and driving blocks (510) located above the heating furnace (100); The number of guide rods (500) is not less than two and they are parallel to each other; The driving blocks (510) are slidably installed on the guide rods (500), and the sliding direction is parallel to the feeding direction of the quartz glass parent material (200).

4. The quartz glass parent material diameter changing position sealing structure according to claim 3, wherein The driving blocks (510) are provided with matching plug-in holes corresponding to the small diameter; The driving blocks (510) are further provided with pin holes corresponding to the plug-in holes; The pin holes extend along the radial direction of the plug-in holes and are used to install penetrating pins; The small diameter is provided with matching penetrating holes corresponding to the penetrating pins.

5. The quartz glass parent material diameter changing position sealing structure according to claim 1, wherein The bottom of the heating furnace (100) is further provided with a traction mechanism; The traction mechanism includes two roller shafts (110) parallel to each other and located on both sides of the outlet; The extension direction of the roller shafts (110) is perpendicular to the feeding direction of the quartz glass parent material (200) and is used to stretch the quartz glass parent material (300).

6. The quartz glass parent material diameter changing position sealing structure according to claim 5, wherein The traction speed of the traction mechanism on the quartz glass parent material (200) is relatively larger than the feeding speed of the feeding mechanism on the quartz glass parent material (200), so as to stretch the quartz glass parent material (200).

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