Precast rod suspender connecting mechanism

Abstract

The utility model relates to the field of optical fiber preform rod sintering, in particular to a preform rod suspender connecting mechanism which is detachably connected to a suspender and a preform rod at the same time. The suspender is provided with a rod body and a bearing part with a larger diameter at one end of the rod body. And the connecting part of the prefabricated rod is provided with a first pin hole which is transversely penetrated. The preform suspender connecting mechanism comprises a connecting heat shielding piece and an adapter. A connecting channel with a first end, a second end opposite to the first end and a clamping part in the middle is formed in the connecting heat shielding piece. The rod body passes through the first end of the connecting channel, the bearing part passes through the second end of the connecting channel, and the rod body passes through the clamping part but the bearing part cannot pass through the clamping part. The adapter comprises a fixing part and a matching part which are connected with each other. The fixing part is detachably connected to the first end of the connecting channel, and the annular matching part comprises a second pin hole and is connected to the connecting part of the preform in a sleeving manner. The plug pin penetrates through the first pin hole and the second pin hole. And the connecting heat shielding piece is not easy to deform, the structure of the suspender is protected, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of optical fiber preform sintering, in particular to a preform hanger connecting mechanism. Background Art

[0002] During the optical fiber preform sintering process, the preform needs to be connected to a hanger, which then suspends the preform in a heating chamber for sintering. Because different preforms need to be processed using the same hanger, the connection between the hanger and the preform needs to be detachable. However, this detachable connection is prone to deformation after repeated sintering. Therefore, a preform hanger connection mechanism that is detachably connected to both the hanger and the preform is required.

[0003] Currently, utility model patent CN213266283U discloses a connection mechanism for a fiber preform rod powder sintering hanger, including a hanger and an adapter. The hanger has a mounting hole at the bottom end, a retaining ring fixed inside the mounting hole, and four notches on the side of the retaining ring. A connecting rod is fixed to the top of the adapter, and four retaining blocks corresponding to the notches are fixed on the top of the connecting rod. A fixing assembly is provided at the bottom end of the hanger. This structure requires high precision, and after multiple sintering cycles, the connection mechanism is prone to structural deformation, becoming unusable and having a short lifespan. Utility Model Content

[0004] The purpose of the utility model is to provide a prefabricated rod suspension rod connecting mechanism with a long service life.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0006] A preformed rod hanger connecting mechanism is used to detachably connect the hanger and the preformed rod.

[0007] The boom comprises a rod body and a bearing portion connected to one end of the rod body and having a diameter larger than that of the rod body;

[0008] The preform rod has a connecting portion, and a first pin hole is formed on the connecting portion of the preform rod and passes through the connecting portion transversely;

[0009] The preform hanger connecting mechanism comprises:

[0010] a connecting heat shield having a connecting channel extending through the connecting heat shield, the connecting channel having a first end, a second end opposite to the first end, and a clamping portion formed in the connecting channel and located between the first end and the second end, the diameter of the first end of the connecting channel being greater than or equal to the diameter of the rod body, the diameter of the second end of the connecting channel being greater than or equal to the diameter of the bearing portion, and the diameter of the clamping portion being greater than or equal to the diameter of the rod body and less than or equal to the diameter of the bearing portion;

[0011] An adapter having a fixing portion and a matching portion connected to each other, wherein the fixing portion is detachably connected to the first end of the connecting channel, the matching portion is configured as an annular structure, the inner wall of the matching portion is matched with the outer wall of the connecting portion of the preform rod, and a second pin hole is provided on the matching portion at a position corresponding to the first pin hole and passing through the matching portion, and the first pin hole and the second pin hole are detachably connected by a pin.

[0012] Optionally, the connecting heat shield includes a shell and a support plate, the shell is constructed into a hollow cylindrical shape, and the two opposite planes of the shell are respectively a first connecting surface and a second connecting surface, the circular through hole at the center of the first connecting surface forms the first end of the connecting channel, and the circular through hole at the center of the second connecting surface forms the second end of the connecting channel, the support plate is fixedly connected to the inner wall of the shell, and the circular through hole at the center of the support plate forms the clamping portion of the connecting channel.

[0013] Optionally, the fixing portion of the adapter includes a head and a neck connected to each other, and the diameter of the head is larger than the diameter of the second end of the connecting channel, and the diameter of the neck is smaller than or equal to the diameter of the second end of the connecting channel;

[0014] A through hole for the head of the adapter to pass through is formed on the side wall of the shell near the second connecting surface, and an entry and exit groove connecting the edge and center of the second connecting surface is formed on the second connecting surface of the shell, the width of the entry and exit groove is smaller than the diameter of the head of the adapter and greater than or equal to the diameter of the neck of the adapter, and the entry and exit groove is connected to the through hole.

[0015] Optionally, the through hole includes a transverse portion for the head of the adapter to pass through and a longitudinal portion for the neck portion connected to the head of the adapter to pass through, and the connection between the transverse portion and the longitudinal portion is located between the first connecting surface and the second connecting surface.

[0016] Optionally, a filling block that fits into the inlet and outlet groove is connected to the outer wall of the adapter, and the filling block is used to fill part or all of the inlet and outlet groove.

[0017] Optionally, a plurality of adapters are included, and the matching portions of the adapters are matched with the connecting portions of the preform rods of different specifications.

[0018] Optionally, the connecting heat shield is made of silicon nitride.

[0019] Optionally, the suspension rod further includes a contraction portion, the diameter of the contraction portion is smaller than the diameter of the rod body, and the contraction portion is connected between the rod body and the bearing portion.

[0020] Optionally, an annular buffer ring is filled between the outer wall of the contraction portion of the suspension rod and the inner wall of the clamping portion of the connecting channel.

[0021] The beneficial effects of the present invention are as follows: the heat shielding member is inserted from the end of the boom away from the load-bearing portion into the second end of the connecting channel, the end of the boom away from the load-bearing portion extends from the first end of the connecting channel, and the load-bearing portion of the boom enters the second end of the connecting channel and is blocked by the latching portion. At this point, the heat shielding member is supported on the boom and removably connected to the boom. The fixing portion of the adapter is removably connected to the first end of the connecting channel and is removably connected to the connection portion of the preform rod via a latch, so that the preform rod is suspended and supported on the boom. The removable connection between the heat shielding member and the boom is achieved through the connecting channel and the load-bearing portion, which has high fault tolerance and can continue to be used even if the structure is slightly deformed. The heat shielding member is wrapped around the load-bearing portion of the boom and the end of the rod body near the load-bearing portion, protecting the boom, suppressing deformation of the boom, and helping to extend the service life of the boom and preform boom connection mechanism. The boom and preform boom connection mechanism is relatively simple in structure, easy to manufacture, low in cost, and highly practical.

[0022] Furthermore, the connecting heat shield is constructed as a hollow shell with a support plate inside. This structure is lightweight, helping to reduce the support burden on the hanger and lowering material costs. The hollow structure has low thermal conductivity, which helps improve thermal insulation and thus extend the service life of the hanger and the preform hanger connection mechanism.

[0023] Furthermore, by arranging through holes and entry and exit grooves on the shell, part of the fixed part of the adapter enters the shell, so that the head of the fixed part of the adapter is directly supported on the second connecting surface, and the detachable connection between the adapter and the connecting heat shield is realized with a simple structure, which has high practicality.

[0024] Furthermore, the height of the connection between the transverse portion and the longitudinal portion through the hole is higher than the second connecting surface. When the head of the fixed portion of the adapter is directly supported on the second connecting surface, the bottom of the transverse portion is higher than the bottom of the head, preventing the fixed portion of the adapter from slipping out of the through hole and falling due to shaking.

[0025] Furthermore, a filling block is provided below the head of the fixing portion of the adapter. When the head is directly supported on the second connection surface, the filling block fills the entry and exit grooves to inhibit the fixing portion of the adapter from sliding in the entry and exit grooves.

[0026] Furthermore, by providing a plurality of adapters adapted for preform rods of different specifications, the universality of the preform rod hanger connection mechanism is improved.

[0027] Furthermore, silicon nitride has high strength and good thermal insulation performance, and can isolate light radiation, which helps to protect the boom and adapter. It also has good load-bearing capacity at high temperatures and is not easy to deform, which helps to extend the overall service life.

[0028] Furthermore, a contraction portion with a smaller diameter is provided near the bearing portion to enlarge the gap between the hanger and the clamping portion of the connecting channel, thereby suppressing collision and friction between the hanger and the clamping portion of the connecting channel caused by shaking, which helps to reduce wear and increase service life.

[0029] Furthermore, by providing a buffer ring, when the clamping portion of the connecting channel is supported on the bearing portion of the suspension rod, a buffer space is provided between the clamping portion of the connecting channel and the suspension rod, thereby reducing the shaking of the suspension rod and the wear between the suspension rod and the connecting channel.

[0030] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural diagram of the preform rod hanger connection mechanism shown in the first embodiment of the present utility model;

[0032] Figure 2 for Figure 1 Sectional view at A-A';

[0033] Figure 3 for Figure 2 Enlarged view of point B in the middle.

[0034] Legend: 1- suspension rod, 11- rod body, 12- bearing part, 13- contraction part, 131- buffer ring, 2- preform rod, 21- connection part, 211- first pin hole, 3- connection heat shield, 31- shell, 311- first connection surface, 312- second connection surface, 313- entry and exit groove, 314- through hole, 315- transverse part, 316- longitudinal part, 32- support plate, 331- first end, 332- second end, 333- clamping part, 4- adapter, 41- fixing part, 411- head, 412- neck, 413- filling block, 42- matching part, 421- second pin hole, 5- plug. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model 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 this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] See Figure 1 、 Figure 2 and Figure 3The preform rod hanger connection mechanism protected by the utility model application is detachably connected to the hanger 1 and the preform rod 2. The hanger 1 has a rod body 11 and a bearing portion 12 with a larger diameter connected to one end of the rod body 11. The preform rod 2 has a connection portion 21 including a first pin hole 211 passing through horizontally. The preform rod hanger connection mechanism includes a connecting heat shield 3 and an adapter 4. A connecting channel is formed inside the connecting heat shield 3, and the connecting channel has a first end 331 and a second end 332 relative to each other, and a clamping portion 333 is formed in the middle. The first end 331 of the connecting channel is for the rod body 11 to pass through, and the second end 332 of the connecting channel is for the bearing portion 12 to pass through. The clamping portion 333 is for the rod body 11 to pass through, but the bearing portion 12 cannot pass through. The adapter 4 includes a fixing portion 41 and a matching portion 42 that are connected to each other. The fixing portion 41 is detachably connected to the first end 331 of the connecting channel. The annular matching portion 42 includes a second pin hole 421, which is sleeved on the outside of the connecting portion 21 of the preform rod 2 and is detachably connected to the connecting portion 21 of the preform rod 2 by a pin 5 passing through the first pin hole 211 and the second pin hole 421.

[0040] Insert the heat shielding member 3 from the end of the boom 1 away from the load-bearing portion 12 into the second end 332 of the connecting channel. The end of the boom 1 away from the load-bearing portion 12 passes through the first end 331 of the connecting channel. After the load-bearing portion 12 of the boom 1 enters the second end 332 of the connecting channel, it is blocked by the clamping portion 333. At this time, the heat shielding member 3 is supported by the boom 1 and is detachably connected to the boom 1. The fixing portion 41 of the adapter 4 is detachably connected to the first end 331 of the connecting channel and is detachably connected to the connecting portion 21 of the preform rod 2 via the latch 5, so that the preform rod 2 is suspended and supported on the boom 1. The detachable connection between the heat shielding member 3 and the boom 1 is achieved through the connecting channel and the load-bearing portion 12, which has a high fault tolerance and can continue to be used even if the structure is slightly deformed. The heat shield 3 is wrapped around the bearing portion 12 of the suspender rod 1 and the end of the rod body 11 near the bearing portion 12, thereby protecting the suspender rod 1 and suppressing deformation of the suspender rod 1, thereby helping to extend the service life of the suspender rod 1 and the preform rod suspender rod connection mechanism. The suspender rod 1 and the preform rod suspender rod connection mechanism has a relatively simple structure, is easy to manufacture, is low in cost, and has high practicality.

[0041] Please refer to the following examples for details.

[0042] Example 1:

[0043] See Figure 1 、 Figure 2 and Figure 3 The preform rod hanger connection mechanism shown in a preferred embodiment of the present application is used to connect the hanger 1 and the preform rod 2.

[0044] In this embodiment, the suspension rod 1 is made of quartz material and includes a coaxially arranged rod body 11, a bearing portion 12 and a contraction portion 13. The rod body 11 is constructed in the shape of an elongated strip, one end of which is fixedly connected to the bearing portion 12, and the end of the bearing portion 12 away from the rod body 11 is fixedly connected to the contraction portion 13. The connection between the rod body 11 and the contraction portion 13 is constructed in a smooth rounded shape. The diameter of the rod body 11 is matched with the clamping structure that clamps the rod body 11. The diameter of the contraction portion 13 is smaller than the rod body 11, and the diameter of the bearing portion 12 is larger than the rod body 11. In the present utility model, the diameter refers to the diameter of a circular structure or the diameter of the circumscribed circle of a polygonal structure. In this embodiment, the rod body 11, the bearing portion 12 and the contraction portion 13 of the suspension rod 1 are all constructed in a cylindrical shape. In other embodiments, they can also be constructed in a polygonal column shape.

[0045] In this example, the outer wall of the contraction portion 13 of the boom 1 is also provided with an annular buffer ring 131. The buffer ring 131 is connected to the load-bearing portion 12 of the boom 1 and has an outer diameter smaller than the load-bearing portion 12 of the boom 1. The buffer ring 131 is constructed of alumina ceramic and is bonded to the contraction portion 13 and the load-bearing portion 12 of the boom 1 via an adhesive. Alumina ceramic is relatively low in cost and has a higher hardness than the boom, which helps protect the boom.

[0046] In this embodiment, the preform rod 2 includes a connecting portion 21 , and a first pin hole 211 is formed on the connecting portion 21 and penetrates the connecting portion 21 along a diameter direction thereof.

[0047] The preform hanger connection mechanism in this embodiment includes a heat shield connection member 3 and multiple adapters 4 of varying sizes. The adapters 4 include a fixing portion 41 and a mating portion 42. The fixing portion 41 of each adapter 4 has the same structure, while the mating portions 42 of each adapter 4 are adapted to accommodate preforms 2 of varying sizes. The heat shield connection member 3 is removably supported on the hanger 1, while the fixing portion 41 of the adapter 4 is removably supported on the heat shield connection member 3. The connection portion 21 of the preform 2 is removably connected to the mating portion 42 of the adapter 4, thereby enabling removable connections between preforms 2 of varying sizes and the hanger 1.

[0048] In this embodiment, the heat shield 3 includes a housing 31 and a support plate 32. The housing 31 is constructed as a hollow cylindrical structure, including a first horizontal connecting surface 311 and a second horizontal connecting surface 312. The side of the housing 31 is connected between the first connecting surface 311 and the second connecting surface 312. Circular through-holes are formed at the center of each of the first connecting surface 311 and the second connecting surface 312 of the housing 31. The support plate 32 is a circular plate-like structure, housed within the interior of the housing 31 and parallel to the second connecting surface 312. Its edge is fixedly connected to the inner wall of the housing 31, and a circular through-hole is formed at the center. The through-holes on the first connecting surface 311, the second connecting surface 312, and the support plate 32 together form a vertical connecting channel. The through-hole on the first connecting surface 311 serves as the first end 331 of the connecting channel, and its diameter is greater than the diameter of the rod body 11. The through-hole on the second connecting surface 312 serves as the second end 332 of the connecting channel, and its diameter is greater than the diameter of the bearing portion 12. The diameter of the clamping portion 333 , which uses the through hole on the support plate 32 as a connecting channel, is equal to the outer diameter of the buffer ring 131 .

[0049] When the end of the hanger 1 away from the load-bearing portion 12 vertically enters the connecting channel, it passes through the connecting channel's clamping portion 333 and first end 331, respectively, while the load-bearing portion 12 of the hanger 1 cannot pass through the connecting channel's clamping portion 333. The hanger 1 is clamped in the clamping structure with the load-bearing portion 12 facing downward. At this point, the support plate 32 of the connecting heat shield 3 is supported on the hanger 1's load-bearing portion 12, achieving a removable connection between the connecting heat shield 3 and the hanger 1. Because the buffer ring 131 is inserted between the outer wall of the contraction portion 13 of the hanger 1 and the inner wall of the connecting channel's clamping portion 333, it suppresses any wobble of the connecting heat shield 3 relative to the hanger 1. Furthermore, the alumina ceramic buffer ring 131 is harder than the silicon nitride support plate 32, making it less susceptible to damage and extending its service life. The portion of the hanger 1 that enters the heating chamber is protected within the connecting heat shield 3, where it is less exposed to high temperatures and light radiation, making it less susceptible to deformation and thus extending its service life.

[0050] The fixing portion 41 of the adapter 4 includes a head 411 and a neck 412 that are connected to each other. The diameter of the head 411 is larger than the diameter of the second end 332 of the connecting channel, and the diameter of the neck 412 is smaller than the diameter of the second end 332 of the connecting channel. A through hole 314 is provided on the side of the shell 31 connected to the heat shield 3. The through hole 314 includes a transverse portion 315 and a longitudinal portion 316. The structure of the transverse portion 315 matches the head 411 of the fixing portion 41 of the adapter 4, and the structure of the longitudinal portion 316 matches the neck 412 of the fixing portion 41 of the adapter 4, and the length is relatively small. The through hole 314 is connected to the second connecting surface 312 of the shell 31. The second connecting surface 312 is provided with an entry and exit groove 313 between the through hole connected at its center and the longitudinal portion 316 of the through hole 314. The fixing portion 41 of the adapter 4 passes through the through hole 314 and along the entry and exit slot 313 to the second end 332 of the connecting channel, so that the head 411 of the fixing portion 41 of the adapter 4 is supported on the second connecting surface 312. This ensures a balanced center of gravity and enables assembly and disassembly of the adapter 4 with a simple structure. The junction of the transverse portion 315 and the longitudinal portion 316 of the through hole 314 is higher than the second connecting surface 312, and the head 411 of the fixing portion 41 of the adapter 4 cannot pass through the longitudinal portion 316 of the through hole 314, thereby preventing the adapter 4 from slipping out of the connecting heat shield 3.

[0051] A filling block 413 is connected to the neck 412 of the fixed portion 41 of the adapter 4 near the head 411. The filling block 413 made of alumina ceramic is bonded to the bottom of the head 411 and one side of the outer wall of the neck 412. When the fixed portion 41 of the adapter 4 passes through the hole 314, the filling block 413 does not contact the connecting heat shield 3. When the head 411 of the fixed portion 41 of the adapter 4 is supported on the second connecting surface 312, the filling block 413 is filled in the entry and exit groove 313. Since the thermal expansion coefficient of alumina ceramic is slightly higher than that of silicon nitride, the friction between the filling block 413 and the entry and exit groove 313 is relatively large, which suppresses the sliding of the adapter 4 and improves the stability of the connection.

[0052] The mating portion 42 of the adapter 4 is constructed into a circular ring structure and is fixedly connected to the fixing portion 41 of the adapter 4 via a circular plate. A second pin hole 421 is formed on the mating portion 42 of the adapter 4, which passes through the mating portion 42 of the adapter 4 along its diameter. The diameter of the inner wall of the adapter 4 matches the outer wall of the connecting portion 21 of the preform 2, and the adapter 4 is sleeved outside the connecting portion 21 of the preform 2. The direction of the second pin hole 421 is parallel to the head 411 of the fixing portion 41 of the adapter 4, and its diameter matches the first pin hole 211. The mating portion 42 of the adapter 4 and the connecting portion 21 of the preform 2 are detachably connected via a pin 5 that passes through the first pin hole 211 and the second pin hole 421.

[0053] The present invention has the beneficial effect of achieving a detachable connection between the hanger rod 1 and the preform rod 2 through a simple structure, which has a high fault tolerance. In addition, the heat shield 3 is connected to protect the portion of the hanger rod 1 entering the heating chamber, thereby suppressing deformation of the hanger rod 1 and helping to extend its service life.

[0054] Example 2:

[0055] The only difference between this embodiment and the first embodiment is that the filling block 413 and the buffer ring 131 are not provided in this embodiment, thereby simplifying the structure and reducing the cost.

[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A preform rod hanger connection mechanism, characterized in that: For detachably connecting the hanger rod (1) and the preform rod (2), The suspension rod (1) comprises a rod body (11) and a bearing portion (12) connected to one end of the rod body (11) and having a diameter larger than that of the rod body (11); The preform rod (2) has a connecting portion (21), and a first pin hole (211) is formed on the connecting portion (21) of the preform rod (2) and passes through the connecting portion (21) transversely. The preform hanger connecting mechanism comprises: A connecting heat shielding member (3) having a connecting channel running through the connecting heat shielding member (3), the connecting channel having a first end (331), a second end (332) opposite to the first end (331), and a clamping portion (333) formed in the connecting channel and located between the first end (331) and the second end (332), the diameter of the first end (331) of the connecting channel being greater than or equal to the diameter of the rod body (11), the diameter of the second end (332) of the connecting channel being greater than or equal to the diameter of the bearing portion (12), and the diameter of the clamping portion (333) being greater than or equal to the diameter of the rod body (11) and less than or equal to the diameter of the bearing portion (12); The adapter (4) comprises a fixing portion (41) and a matching portion (42) connected to each other, wherein the fixing portion (41) is detachably connected to the first end (331) of the connecting channel, and the matching portion (42) is configured as an annular structure, wherein the inner wall of the matching portion (42) matches the outer wall of the connecting portion (21) of the preform rod (2), and a second pin hole (421) passing through the matching portion (42) is provided at a position on the matching portion (42) corresponding to the first pin hole (211), and the first pin hole (211) and the second pin hole (421) are detachably connected via a pin (5).

2. The preform rod hanger connection mechanism according to claim 1, wherein: The connecting heat shielding member (3) comprises a shell (31) and a support plate (32); the shell (31) is constructed into a hollow cylindrical shape, and the two opposite planes of the shell (31) are respectively a first connecting surface (311) and a second connecting surface (312); a circular through hole at the center of the first connecting surface (311) forms the first end (331) of the connecting channel, and a circular through hole at the center of the second connecting surface (312) forms the second end (332) of the connecting channel; the support plate (32) is fixedly connected to the inner wall of the shell (31), and the circular through hole at the center of the support plate (32) forms the clamping portion (333) of the connecting channel.

3. The preform rod hanger connection mechanism according to claim 2, wherein: The fixing portion (41) of the adapter (4) comprises a head (411) and a neck (412) connected to each other, wherein the diameter of the head (411) is larger than the diameter of the second end (332) of the connecting channel, and the diameter of the neck (412) is smaller than or equal to the diameter of the second end (332) of the connecting channel; A through hole (314) for the head (411) of the adapter (4) to pass through is formed on the side wall of the shell (31) near the second connecting surface (312), and an entry and exit groove (313) connecting the edge and the center of the second connecting surface (312) is formed on the second connecting surface (312) of the shell (31), the width of the entry and exit groove (313) is smaller than the diameter of the head (411) of the adapter (4) and greater than or equal to the diameter of the neck (412) of the adapter (4), and the entry and exit groove (313) is connected to the through hole (314).

4. The preform rod hanger connection mechanism according to claim 3, wherein: The through hole (314) includes a transverse portion (315) for the head (411) of the adapter (4) to pass through, and a longitudinal portion (316) for the portion of the neck (412) connected to the head (411) of the adapter (4) to pass through, and the connection between the transverse portion (315) and the longitudinal portion (316) is located between the first connecting surface (311) and the second connecting surface (312).

5. The preform rod hanger connection mechanism according to claim 4, characterized in that: A filling block (413) that matches the inlet and outlet groove (313) is connected to the outer wall of the adapter (4), and the filling block (413) is used to fill part or all of the inlet and outlet groove (313).

6. The preform rod hanger connection mechanism according to any one of claims 1 to 5, characterized in that: It comprises a plurality of adapters (4), and the matching parts (42) of the adapters (4) are matched with the connecting parts (21) of the preform rods (2) of different specifications.

7. The preform rod hanger connection mechanism according to any one of claims 1 to 5, characterized in that: The connecting heat shield (3) is made of silicon nitride material.

8. The preform rod hanger connection mechanism according to any one of claims 1 to 5, characterized in that: The suspension rod (1) further comprises a contraction portion (13), the diameter of the contraction portion (13) being smaller than the diameter of the rod body (11), and the contraction portion (13) being connected between the rod body (11) and the bearing portion (12).

9. The preform rod hanger connection mechanism according to claim 8, wherein: An annular buffer ring (131) is filled between the outer wall of the contraction portion (13) of the suspension rod (1) and the inner wall of the clamping portion (333) of the connecting channel.

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