Telescopic protective sleeve of resistance furnace

Abstract

A rod feeding rod is fixed to a light rod, the light rod is coaxially arranged in the protective sleeve, the protective sleeve is fixed to a resistance furnace body, a carbon sleeve and a telescopic cylinder are coaxially arranged from inside to outside, the telescopic cylinder is arranged on the outer side of the protective sleeve in a sleeving mode, the carbon sleeve is arranged between the light rod and the protective sleeve, and the carbon sleeve is arranged between the light rod and the protective sleeve. The lifting unit is arranged on the tower and drives the rod feeding rod to move downwards, the rod feeding rod drives the telescopic cylinder and the carbon sleeve to move downwards at the same time, the telescopic cylinder stops moving downwards when the telescopic cylinder abuts against the protective sleeve, and the carbon sleeve stops moving downwards when the carbon sleeve abuts against the protective sleeve. On the basis that an original equipment main body structure and an original building main body structure are not changed, the telescopic cylinder device is additionally arranged on the top of an existing protective sleeve, the telescopic cylinder can extend on the original protective sleeve in a closed mode along with a rod feeding rod, the implementation cost is low, meanwhile, the length of an optical rod capable of being produced by a machine table is increased, and the production redundancy is improved.

Description

Technical Field

[0001] The invention relates to a telescopic protective sleeve of a resistance furnace. Background Art

[0002] The top resistance furnace system of the optical fiber drawing equipment includes the resistance furnace body, the sheath tube, the rod feeding rod, the rod feeding transmission system, etc., among which each component is originally designed and the size is fixed. Comprehensively considering the following main problems: 1) The size of the sheath tube is fixed, and the maximum length of the optical rod that can be produced is determined. If the length of the sheath tube in the initial design is too short, the redundancy of the optical rod that can be produced is relatively small; 2) If the initial length of the sheath tube is relatively long, the height of the entire equipment and the top building must be designed to be very high, which is not practical in terms of equipment stability or operating costs. Summary of the invention

[0003] The present invention provides a telescopic sleeve for a resistance furnace in order to solve the problems existing in the prior art.

[0004] The technical solutions adopted in the present invention are: A telescopic sleeve of a resistance furnace comprises a tower and a resistance furnace body arranged at the bottom of the tower, and also comprises a rod feeding rod, a telescopic sleeve, a carbon sleeve, a light rod, a protection sleeve and a lifting unit, wherein the rod feeding rod is fixed to the light rod, and the light rod is coaxially arranged in the protection sleeve, the protection sleeve is fixed to the resistance furnace body, the carbon sleeve and the telescopic sleeve are coaxially arranged from inside to outside, and the telescopic sleeve is sleeved on the outside of the protection sleeve, the carbon sleeve is placed between the light rod and the protection sleeve, the lifting unit is arranged on the tower and drives the rod feeding rod to move downward, the rod feeding rod drives the telescopic sleeve and the carbon sleeve downward at the same time, the telescopic sleeve stops moving downward when it collides with the protection sleeve, and the carbon sleeve stops moving downward when it collides with the protection sleeve.

[0005] Furthermore, the rod feeding rod is provided with an assembly structure for driving the telescopic cylinder and the carbon sleeve to maintain synchronous movement, the assembly structure includes a first seat body and a second seat body, the second seat body is fixed on the rod feeding rod, the first seat body is sleeved on the rod feeding rod, and the first seat body and the second seat body are plugged into each other, the telescopic cylinder is assembled with the first seat body, and the carbon sleeve is supported on the second seat body.

[0006] Furthermore, the upper ends of the telescopic tube and the carbon sleeve extend inward to form a first supporting edge and a second supporting edge respectively. The first supporting edge is assembled with the first seat body, and the second supporting edge is supported on the second seat body. When the telescopic tube moves downward and the first supporting edge abuts against the protective sleeve tube, the first supporting edge is separated from the first seat body; when the carbon sleeve moves downward and abuts against the protective sleeve tube, the first seat body is separated from the second seat body.

[0007] Furthermore, the outer wall surface of the second seat body contacts the inner wall surface of the carbon sleeve; and the outer wall surface of the carbon sleeve contacts the inner wall surface of the protective sleeve.

[0008] Furthermore, the outer wall surface of the upper port of the sleeve tube extends outward to form a limiting edge, the outer wall surface of the limiting edge contacts the inner wall surface of the telescopic tube, and when the first supporting edge abuts against the limiting edge, the telescopic tube stops moving downward.

[0009] Furthermore, a limiting step is provided on the inner wall of the protective sleeve, and when the lower end surface of the carbon sleeve abuts against the limiting step, the carbon sleeve stops moving downward.

[0010] Furthermore, the lifting unit is an electric screw.

[0011] Furthermore, the rod feeding rod and the light rod are fixed by a connecting pin.

[0012] The present invention has the following beneficial effects: 1) Without changing the main structure of the original equipment and the main structure of the building, only by adding a telescopic tube device on the top of the existing protective tube, this telescopic tube can be extended on the original protective tube along with the rod feeding rod, which not only has low implementation costs, but also increases the length of the light rods that can be produced by the machine and improves production redundancy; 2) The unique structure of the present invention can ensure the stability of the center of the carbon sleeve during the up and down sliding process, and the smooth operation, and also ensure that there is no oxidation inside the resistance furnace and the bare fiber is stable during the entire production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the present invention.

[0014] Figure 2 This is a structural diagram of the telescopic cylinder and the first seat body being separated.

[0015] Figure 3 This is a structural diagram of the first base body and the second base body being separated.

[0016] Figure 4 for Figure 1 Enlarged view of part A in the middle.

[0017] Figure 5 for Figure 1 Enlarged view of part B in the middle.

[0018] Figure 6 for Figure 3 Enlarged view of part C in the middle. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] like Figures 1 to 6The invention discloses a telescopic sleeve of a resistance furnace, comprising a tower 1, a rod-feeding rod 3, a telescopic sleeve 4, a carbon sleeve 6, a light rod 11, a sleeve sleeve 14, a resistance furnace body 15 and a lifting unit 16. The resistance furnace body 15 is arranged at the bottom of the tower 1, and the rod-feeding rod 3 and the light rod 11 are fixed by a connecting pin 8. The light rod 11 is coaxially arranged in the sleeve sleeve 14, the sleeve sleeve 14 is fixed on the resistance furnace body 15, the carbon sleeve 6 and the telescopic sleeve 4 are coaxially arranged from inside to outside, and the telescopic sleeve 4 is sleeved on the outside of the sleeve sleeve 14, the carbon sleeve 6 is placed between the light rod 11 and the sleeve sleeve 14, the lifting unit is arranged on the tower 1 and drives the rod-feeding rod 3 to move downward, the rod-feeding rod 3 drives the telescopic sleeve 4 and the carbon sleeve 6 to move downward at the same time, the telescopic sleeve 4 stops moving downward when it conflicts with the sleeve sleeve 14, and the carbon sleeve 6 stops moving downward when it conflicts with the sleeve sleeve 14.

[0021] In order to realize the assembly of the telescopic cylinder 4 and the carbon sleeve 6 on the rod feeding rod 3, an assembly structure for driving the telescopic cylinder 4 and the carbon sleeve 6 to maintain synchronous movement is provided on the rod feeding rod 3, and the assembly structure includes a first seat body 5 and a second seat body 7. The second seat body 7 is fixed on the rod feeding rod 3, the first seat body 5 is sleeved on the rod feeding rod 3, and the first seat body 5 and the second seat body 7 are plugged into each other, the telescopic cylinder 4 is assembled with the first seat body 5, and the carbon sleeve 6 is supported on the second seat body 7.

[0022] The upper ends of the telescopic cylinder 4 and the carbon sleeve 6 extend inward to form the first supporting edge 41 and the second supporting edge 61 respectively. The first supporting edge 41 and the first seat body 5 are plugged into each other, and the second supporting edge 61 is supported on the second seat body 7. When the telescopic cylinder 4 moves downward and the first supporting edge 41 contacts the protective sleeve 14, the first supporting edge 41 separates from the first seat body 5. When the carbon sleeve 6 moves downward and contacts the protective sleeve 14, the first seat body 5 separates from the second seat body 7.

[0023] The outer wall surface of the second seat body 7 contacts the inner wall surface of the carbon sleeve 6; the outer wall surface of the carbon sleeve 6 contacts the inner wall surface of the protective sleeve 14. During movement, the contact between the corresponding outer wall surface and the inner wall surface can play a centering role.

[0024] The outer wall surface of the upper end of the protective sleeve 14 extends outward to form a limiting edge 141, and the outer wall surface of the limiting edge 141 contacts the inner wall surface of the telescopic cylinder 4. When the first supporting edge 41 abuts against the limiting edge 141, the telescopic cylinder 4 stops moving downward.

[0025] A limiting step 142 is provided on the inner wall of the protective sleeve 14. When the lower end surface of the carbon sleeve 6 abuts against the limiting step 142, the carbon sleeve 6 stops moving downward.

[0026] The lifting unit 16 is an electric screw, which is arranged vertically. A cross bar 2 is fixed to the lifting free end of the electric screw, and the cross bar 2 is fixedly connected to the rod feeding rod 3.

[0027] Figure 1 This is a schematic diagram of the position of the telescopic cylinder during the initial production of long optical rods. At this time, the cross bar 2 is at the top of the tower 1, and the rod feeding rod 3, the telescopic cylinder 4, the first seat body 5, the carbon sleeve 6, the second seat body 7 and the optical rod 11 will all move slowly and smoothly downwards with the cross bar 2 driven by the lifting unit 16 to carry out production.

[0028] During this process, the telescopic cylinder 4, the first seat body 5 and the second seat body 7 are tightly fitted together through plug-in assembly without separation, the outer wall of the carbon sleeve 6 is close to the inner wall of the protective sleeve tube 14, and the inner wall of the telescopic cylinder 4 is close to the outer wall of the limiting edge 141, thereby ensuring the sealing inside the resistance furnace. At the same time, the contact and sliding between the telescopic cylinder 4 and the limiting edge 141, and between the carbon sleeve 6 and the protective sleeve tube 14 will not cause fluctuations in the bare fiber.

[0029] like Figure 2 The figure shows the position of the telescopic cylinder during the production of the long light rod. In this process, the telescopic cylinder 4 will be separated from the first seat body 5, and slowly fall along the outer wall of the limiting edge 141 to the chamfered fitting surface of the limiting edge 141, and then remain still.

[0030] The rod feeding rod 3, the first seat body 5, the carbon sleeve 6, the second seat body 7 and the light rod 11 will all move slowly and steadily downwards with the cross bar 2 driven by the lifting unit 16 to continue production. During the process, the first seat body 5 and the second seat body 7 are tightly fitted through the plug-in assembly and do not separate. The outer wall of the carbon sleeve 6 is close to the inner wall of the protective sleeve 14, ensuring the sealing inside the resistance furnace. At the same time, the contact sliding between the carbon sleeve 6 and the protective sleeve 14 will not cause the bare fiber to fluctuate.

[0031] like Figure 3 The figure shows the position of the telescopic cylinder when the production of the long light rod is almost finished. In this process, the carbon sleeve 6 will slowly fall along the inner wall of the protective sleeve 14 to the limit step 142 on the inner wall of the protective sleeve 14, and then remain stationary. The second seat body 7 will separate from the first seat body 5. After separation, the second seat body 7 and the light rod 11 will move slowly and steadily downward with the cross bar 2 driven by the lifting unit 16, and continue production until the light rod production is completed. During the process, the outer wall of the second seat body 7 will be close to the inner wall of the carbon sleeve 6 and the outer wall of the rod feeding rod 3 to ensure the sealing inside the resistance furnace.

[0032] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A telescopic sleeve for a resistance furnace, comprising a tower (1) and a resistance furnace body (15) arranged at the bottom of the tower (1), characterized in that: The invention also comprises a rod feeding rod (3), a telescopic cylinder (4), a carbon sleeve (6), a light rod (11), a protective sleeve (14) and a lifting unit (16), wherein the rod feeding rod (3) is fixed to the light rod (11), and the light rod (11) is coaxially arranged in the protective sleeve (14), the protective sleeve (14) is fixed to the resistance furnace body (15), the carbon sleeve (6) and the telescopic cylinder (4) are coaxially arranged from the inside to the outside, and the telescopic cylinder (4) is sleeved in the protective sleeve (16). 4), the carbon sleeve (6) is placed between the light rod (11) and the protective sleeve (14), the lifting unit is arranged on the tower (1) and drives the rod-feeding rod (3) to move downward, the rod-feeding rod (3) drives the telescopic cylinder (4) and the carbon sleeve (6) to move downward at the same time, when the telescopic cylinder (4) contacts the protective sleeve (14), the telescopic cylinder (4) stops moving downward, and when the carbon sleeve (6) contacts the protective sleeve (14), the carbon sleeve (6) stops moving downward.

2. The telescopic sleeve for a resistance furnace as claimed in claim 1, characterized in that: The rod feeding rod (3) is provided with an assembly structure for driving the telescopic cylinder (4) and the carbon sleeve (6) to maintain synchronous movement, the assembly structure comprising a first seat body (5) and a second seat body (7), the second seat body (7) being fixed on the rod feeding rod (3), the first seat body (5) being sleeved on the rod feeding rod (3), and the first seat body (5) and the second seat body (7) being plugged into each other, the telescopic cylinder (4) being assembled with the first seat body (5), and the carbon sleeve (6) being supported on the second seat body (7).

3. The telescopic sleeve for resistance furnace according to claim 2, characterized in that: The upper ends of the telescopic cylinder (4) and the carbon sleeve (6) both extend inwards to form a first supporting edge (41) and a second supporting edge (61) respectively. The first supporting edge (41) is assembled with the first seat body (5), and the second supporting edge (61) is supported on the second seat body (7). When the telescopic cylinder (4) moves downward and the first supporting edge (41) contacts the protective sleeve (14), the first supporting edge (41) is separated from the first seat body (5); when the carbon sleeve (6) moves downward and contacts the protective sleeve (14), the first seat body (5) is separated from the second seat body (7).

4. The telescopic sleeve for resistance furnace according to claim 2, characterized in that: The outer wall surface of the second seat body (7) contacts the inner wall surface of the carbon sleeve (6); and the outer wall surface of the carbon sleeve (6) contacts the inner wall surface of the protective sleeve (14).

5. The telescopic sleeve for resistance furnace according to claim 3, characterized in that: The outer wall surface of the upper end of the protective sleeve (14) extends outwards to form a limiting edge (141), and the outer wall surface of the limiting edge (141) contacts the inner wall surface of the telescopic cylinder (4). When the first supporting edge (41) contacts the limiting edge (141), the telescopic cylinder (4) stops moving downward.

6. The telescopic sleeve for resistance furnace according to claim 3, characterized in that: A limiting step (142) is provided on the inner wall of the protective sleeve (14), and when the lower end surface of the carbon sleeve (6) abuts against the limiting step (142), the carbon sleeve (6) stops moving downward.

7. The telescopic sleeve for a resistance furnace as claimed in claim 1, characterized in that: The lifting unit (16) is an electric screw.

8. The telescopic sleeve for a resistance furnace as claimed in claim 1, characterized in that: The rod feeding rod (3) and the light rod (11) are fixed via a connecting pin.

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