A fire-resistant and flame-retardant structure for suspension bridge cable clamp

Abstract

The present invention discloses a fire-resistant and flame-retardant structure for a cable clamp of a suspension bridge, comprising a main cable and a cable clamp fixed on the main cable, wherein the gap between the two ends of the cable clamp and the main cable is filled with fire-resistant sealant; a fire-resistant sealing ring is sleeved on the main cable and fits with the gap between the end of the cable clamp and the main cable; a rotating seat is connected to a locking screw near the end of the cable clamp; one end of an elastic pull rod is hinged with the rotating part of the rotating seat and faces the outside of the end of the cable clamp; an annular fireproof cover is sleeved on the outside of the cable clamp head end and connected to one end of the elastic pull rod away from the rotating seat, and the annular fireproof cover is pressed against the fireproof sealing ring by the elastic tension of the elastic pull rod. The fireproof structure adopted by the present invention enables the annular fireproof cover to perform adaptive deformation movement with the movement of the cable clamp, always maintains fireproof sealing of the gap between the cable clamp and the main cable, and can overcome the fireproof failure of the gap caused by long-term displacement of the cable clamp.

Description

Technical Field

[0001] The invention relates to the technical field of fire protection of bridge cable clamps, and more particularly to a fire-resistant and flame-retardant structure for suspension bridge cable clamps. Background Art

[0002] As a major public interest construction project, bridge fire prevention has received more and more attention. Corresponding fire prevention measures are required from the main structure of the bridge to each key component structure. For the cable clamp of the suspension bridge, the cable clamp is the key core load-bearing component connecting the main cable and the sling. The cable clamp is usually divided into two half-cable clamps. The two half-cable clamps can be bolted together and sleeved on the main cable, and the outside of the cable clamp can be connected to the sling. The function of the cable clamp is to transfer the load of the sling connected to it to the main cable, and at the same time, the reliable friction force is obtained through the extrusion force generated by the bolt tightening force of the cable clamp on the main cable, thereby offsetting the sliding force generated by the sling on the cable clamp.

[0003] Fire protection of the cable clamp is very important. If the cable clamp is burned by fire, the cable connected to it will lose its function. Therefore, many methods are used in the prior art, such as coating the cable clamp with fire-resistant materials, coating with fire-resistant coatings, or protecting the cable clamp with external structures. However, after research, it was found that although the cable clamp is protected, the bolts connecting the cable clamp are still exposed, which makes the fire protection loophole appear, which is very unfavorable for the fire protection of the cable clamp. Moreover, although the gap formed between the cable clamp and the main cable is filled with sealant, the displacement of the cable clamp over a long period of use will cause the sealant to crack. If the fire burns in from the inside, it will be fatal to the safety of the cable clamp and the main cable.

[0004] Therefore, how to provide a fire-resistant and flame-retardant structure that can improve the fire-proof function of the cable clamp is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] In view of this, the present invention provides a fire-resistant and flame-retardant structure for a suspension bridge cable clamp, aiming to solve the above technical problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A fire-resistant and flame-retardant structure for a cable clamp of a suspension bridge, comprising a main cable and a cable clamp fixed on the main cable, wherein the gap between the two ends of the cable clamp and the main cable is filled with fire-resistant sealant; and further comprising:

[0008] Fireproof sealing ring; the fireproof sealing ring is sleeved on the main cable and fits into the gap between the cable clamp end and the main cable;

[0009] Rotating seat; the rotating seat is connected to the locking screw near the end of the cable clamp;

[0010] An elastic pull rod; one end of the elastic pull rod is hinged to the rotating part of the rotating seat and faces the outer side of the cable clamp end;

[0011] An annular fireproof cover; the annular fireproof cover is sleeved on the outer side of the cable clamp head end and is connected to the end of the elastic pull rod away from the rotating seat, and the annular fireproof cover is pressed against the fireproof sealing ring through the elastic tension of the elastic pull rod.

[0012] Through the above technical scheme, the present invention adopts a rotating seat to form a fire protection for the locking screw, adopts an annular fire cover to form a fire protection for the gap between the two ends of the cable clamp and the main cable, and uses an elastic pull rod to connect the two sets of fire protection structures to form an integral structure, thereby improving the stability of the overall structure. Moreover, the annular fire cover can move with the movement of the cable clamp and has elastic activity performance, which can better play a follow-up fire protection effect and is not easy to cause hard damage.

[0013] Preferably, in the above-mentioned fire-resistant and flame-retardant structure for suspension bridge cable clamps, the rotating seat includes a connecting sleeve and a rotating head; a locking nut is fixed to the inner side of the connecting sleeve through multiple connecting rods, and the locking nut is connected to the locking screw so that the connecting sleeve is pressed against the cable clamp; the rotating head is clamped with the top edge of the connecting sleeve and can rotate relative to the connecting sleeve, and a first hinged hole plate is provided on the side wall of the rotating head. The rotating seat is a split structure, the connecting sleeve can be fastened, the rotating head can be directly connected to it through a claw structure to complete the assembly, and the rotation of the rotating head can be realized, and the overall structure has the characteristics of simple and convenient connection.

[0014] It should be noted that, in order to facilitate the fastening of the connecting sleeve, an external hexagonal structure is processed on the outside of the connecting sleeve. A clamping ring is provided on the inner side of the top edge of the connecting sleeve, and a multi-petal claw structure is formed at the lower part of the rotating head, and the claw structure is directly clamped with the clamping ring.

[0015] Preferably, in the above-mentioned fire-resistant and flame-retardant structure for suspension bridge cable clamps, the connecting sleeve and the rotating head are both made of stainless steel, and the surface is coated with an ablative layer. The stainless steel material has a better anti-corrosion effect and can meet the strength requirements of the structure, and the ablative material can play an effective heat shielding role and protect the base material.

[0016] Preferably, in the above-mentioned fire-resistant and flame-retardant structure for suspension bridge cable clamp, the internal cavities of the connecting sleeve and the rotating head are filled with fire-resistant sealant. The fire-resistant sealant can fill the joint gap between the connecting sleeve and the rotating head, as well as the gap of the claw structure of the rotating head, to achieve fire protection for the internal locking screw.

[0017] Preferably, in the fire-resistant and flame-retardant structure for suspension bridge cable clamps, the elastic pull rod has a second hinged hole plate for connecting to the first hinged hole plate at one end facing the rotating seat. The first hinged hole plate is directly connected to the second hinged hole plate to form a hinged structure, which is convenient for connection and easy for on-site construction.

[0018] Preferably, in the fire-resistant and flame-retardant structure for suspension bridge cable clamps, the elastic pull rod is a double-layer sleeve structure connected by a tension spring. The double-layer sleeve structure has both certain structural strength and elastic expansion performance.

[0019] Preferably, in the fire-resistant and flame-retardant structure for suspension bridge cable clamps, the annular fireproof cover has an ear plate corresponding to the elastic pull rod, and the end of the elastic pull rod away from the rotating seat is fixedly connected to the ear plate by screws. The provision of the ear plate can facilitate the rapid connection of the annular fireproof cover and the elastic pull rod, and is convenient for construction.

[0020] Preferably, in the fire-resistant and flame-retardant structure for suspension bridge cable clamps, a fireproof layer is bonded and fixed to the inner side of the annular fireproof cover. The fireproof layer is added inside to further improve the fireproof effect. Moreover, due to the structural design of the annular fireproof cover, it is not only a simple fireproofing of the gap, but also a fireproofing of both ends of the cable clamp to prevent the fire from affecting the cable clamp.

[0021] Preferably, in the fire-resistant and flame-retardant structure for suspension bridge cable clamps, the annular fireproof cover is a shell structure composed of two half shells, and the two half shells are fastened and connected by bolts. The annular fireproof cover is assembled by docking the two half shells, which has a simple structure, convenient connection and strong stability.

[0022] Preferably, in the above-mentioned fire-resistant and flame-retardant structure for suspension bridge cable clamps, the annular fireproof cover is made of stainless steel and coated with an ablative layer on the surface. The stainless steel material has a better anti-corrosion effect and can meet the strength requirements of the structure, and the ablative material can play an effective heat shielding role and protect the base material.

[0023] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a fire-resistant and flame-retardant structure for a suspension bridge cable clamp, which has the following beneficial effects:

[0024] 1. The fireproof structure adopted in the present invention enables the annular fireproof cover to adaptively deform and move with the movement of the cable clamp, always maintaining the fireproof sealing of the gap between the cable clamp and the main cable, and can overcome the fireproof failure of the gap caused by long-term cable clamp displacement.

[0025] 2. The fireproof structure provided by the present invention has multiple degrees of freedom such as rotation, up and down shaking and stretching. When used on the cable clamp, it can prevent deformation and damage caused by rigid connection, and can better adapt to environmental conditions and prevent damage.

[0026] 3. The fireproof structure provided by the present invention takes into account the fireproofing between the cable clamp and the main cable gap, as well as the fireproofing of the cable clamp bolts, and has stronger fireproofing performance.

[0027] 4. The present invention has a simple structure, is easy to assemble and connect, and is convenient to disassemble and repair, and has a stronger construction and use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0029] Figure 1 The accompanying drawing is a schematic structural diagram of a fire-resistant and flame-retardant structure for a suspension bridge cable clamp provided by the present invention;

[0030] Figure 2 The accompanying drawing is an axial schematic diagram of a fire-resistant and flame-retardant structure for a suspension bridge cable clamp provided by the present invention;

[0031] Figure 3 The accompanying drawing is a main cross-sectional view of the fire-resistant and flame-retardant structure for a suspension bridge cable clamp provided by the present invention;

[0032] Figure 4 The accompanying drawing is a schematic structural diagram of a connecting sleeve provided by the present invention;

[0033] Figure 5 The accompanying drawing is a schematic structural diagram of a rotating head provided by the present invention;

[0034] Figure 6 The accompanying drawing is an exploded structural cross-sectional view of the rotating seat provided by the present invention;

[0035] Figure 7 The accompanying drawing is a schematic diagram of the exploded structure of the annular fireproof cover provided by the present invention;

[0036] Figure 8 The accompanying drawing is a schematic diagram of the structure of the fireproof layer provided by the present invention;

[0037] Fig. 9 The accompanying drawing is a schematic diagram of the outer side of the annular fireproof cover provided by the present invention;

[0038] Fig.10The accompanying drawing is a schematic diagram of the inner side of the annular fireproof cover provided by the present invention;

[0039] Fig.11 The accompanying drawing is a schematic diagram of the structure of the L-shaped plate and bolts provided by the present invention;

[0040] Fig.12 The accompanying drawing is a schematic structural diagram of the elastic pull rod provided by the present invention;

[0041] Fig.13 The accompanying drawing is a cross-sectional view of the elastic pull rod provided by the present invention;

[0042] Fig.14 The accompanying drawing is a schematic structural diagram of the main cable after the cable clamp is installed provided by the present invention;

[0043] Fig.15 The accompanying drawing is a structural schematic diagram of step 1 of a construction and assembly method of a fire-resistant and flame-retardant structure for a suspension bridge cable clamp provided by the present invention;

[0044] Fig.16 The accompanying drawing is a structural schematic diagram of step 2 of the construction and assembly method of the fire-resistant and flame-retardant structure for suspension bridge cable clamps provided by the present invention;

[0045] Fig.17 The accompanying drawing is a structural schematic diagram of step three of the construction and assembly method of the fire-resistant and flame-retardant structure for suspension bridge cable clamps provided by the present invention;

[0046] Fig.18 The accompanying drawing is a structural schematic diagram of step 4 of the construction and assembly method of the fire-resistant and flame-retardant structure for suspension bridge cable clamps provided by the present invention;

[0047] Fig.19 The accompanying drawing is a structural schematic diagram of step five of the construction and assembly method of the fire-resistant and flame-retardant structure for suspension bridge cable clamps provided by the present invention.

[0048] in:

[0049] 1- Main cable;

[0050] 2-cable clamp;

[0051] 21-locking screw;

[0052] 3- Fireproof sealing ring;

[0053] 4- rotating seat;

[0054] 41-connecting sleeve; 411-connecting rod; 412-locking nut; 413-clamping ring; 42-rotating head; 421-first hinged hole plate; 422-claw structure; 423-glue injection hole;

[0055] 5-Elastic pull rod;

[0056] 51-second hinged hole plate; 52-tension spring; 53-screw; 54-solid rod; 55-hollow tube; 551-mounting hole; 56-internal threaded tube;

[0057] 6- annular fireproof cover;

[0058] 61-ear plate; 611-connection hole; 612-counterbore; 62-half shell; 621-threaded hole; 63-bolt; 64-L-type plate;

[0059] 7- Fireproof layer. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] See attached Figure 1 To Attachment Figure 3 The embodiment of the present invention discloses a fire-resistant and flame-retardant structure for a cable clamp of a suspension bridge, comprising a main cable 1, and a cable clamp 2 fixed on the main cable 1, wherein the gap between the two ends of the cable clamp 2 and the main cable 1 is filled with a fire-resistant sealant; and further comprising:

[0062] Fireproof sealing ring 3; the fireproof sealing ring 3 is sleeved on the main cable 1 and fits the gap between the end of the cable clamp 2 and the main cable 1;

[0063] The rotating seat 4 is connected to the locking screw 21 near the end of the cable clamp 2;

[0064] Elastic pull rod 5; one end of the elastic pull rod 5 is hinged to the rotating portion of the rotating seat 4 and faces the outer side of the end of the cable clamp 2;

[0065] Annular fireproof cover 6; the annular fireproof cover 6 is sleeved on the outer side of the head end of the cable clamp 2, and is connected to the end of the elastic pull rod 5 away from the rotating seat 4, and the annular fireproof cover 6 is pressed against the fireproof sealing ring 3 by the elastic tension of the elastic pull rod 5.

[0066] See attached Figure 4 To Attachment Figure 6 The rotating seat 4 includes a connecting sleeve 41 and a rotating head 42; a locking nut 412 is fixed to the inner side of the connecting sleeve 41 through multiple connecting rods 411, and the locking nut 412 is connected to the locking screw 21, so that the connecting sleeve 41 is tightly pressed against the cable clamp 2; the rotating head 42 is clamped with the top edge of the connecting sleeve 41 and can rotate relative to the connecting sleeve 41, and a first hinged hole plate 421 is provided on the side wall of the rotating head 42.

[0067] like Figure 4 As shown, in order to facilitate the fastening of the connecting sleeve 41, an outer hexagonal structure is processed on the outer side of the connecting sleeve 41.

[0068] like Figure 6 As shown, a clamping ring 413 is provided on the inner side of the top edge of the connecting sleeve 41 , and a multi-petal claw structure 422 is formed at the lower part of the rotating head 42 , and the claw structure 422 is directly clamped with the clamping ring 413 .

[0069] A glue injection hole 423 penetrating to the inner cavity of the rotating head 42 is also provided on the top of the rotating head 42 , so that glue can be injected into the interior of the rotating head 42 after the rotating head 42 is installed.

[0070] In order to further optimize the above technical solution, the connecting sleeve 41 and the rotating head 42 are both made of stainless steel, and the surface is coated with an ablation layer.

[0071] In order to further optimize the above technical solution, the internal cavities of the connecting sleeve 41 and the rotating head 42 are filled with fireproof sealant.

[0072] See attached Figure 7 To Attachment Fig.11 The annular fireproof cover 6 has an ear plate 61 corresponding to the elastic pull rod 5 , and one end of the elastic pull rod 5 away from the rotating seat 4 is fixedly connected to the ear plate 61 by a screw 53 .

[0073] In order to further optimize the above technical solution, a fireproof layer 7 is bonded and fixed to the inner side of the annular fireproof cover 6 .

[0074] In order to further optimize the above technical solution, the annular fireproof cover 6 is a shell structure composed of two half shells 62, and the two half shells 62 are fastened together by bolts 63. Fig.11 As shown, an L-shaped plate 64 is used to achieve the connection and fastening between the two half shells 62. The half shells 62 are provided with threaded holes for connection with bolts 63.

[0075] In order to further optimize the above technical solution, the annular fireproof cover 6 is made of stainless steel and the surface is coated with an ablative layer.

[0076] like Figure 7 As shown, the shape of the annular fireproof cover 6 is designed to be consistent with the end face shape of the cable clamp 2. The ear plate 61 is provided with a connection hole 611 for the screw 53 to connect, and the side of the ear plate 61 facing away from the cable clamp 2 is provided with a countersunk hole 612 coaxial with the connection hole 611, so that the screw 53 can be embedded in the countersunk hole 612, and at the same time, the countersunk hole 612 can be filled with fireproof sealant for sealing.

[0077] See attached Fig.12 To Attachment Fig.13The elastic pull rod 5 has a second hinged hole plate 51 connected to the first hinged hole plate 421 at one end thereof facing the rotating seat 4. The elastic pull rod 5 is a double-layer sleeve structure connected by a tension spring 52.

[0078] Specifically, the second hinged hole plate 51 is fixedly connected with a solid rod 54, and a hollow tube 55 is sleeved on the outside of the solid rod 54. A tension spring 52 is fixed between the end of the solid rod 54 located inside the hollow tube 55 and the end of the hollow tube 55. In order to facilitate the installation of the tension spring 52, a mounting hole 551 can be opened at the end of the hollow tube 55, so that the end of the tension spring 52 can be conveniently locked and fixed from the outside. An internal threaded tube 56 is fixed to the outer end of the hollow tube 55 away from the second hinged hole plate 51. In this way, when assembling, the internal threaded tube 56 is inserted into the connecting hole 611, and the screw 53 is screwed in from the side of the countersunk hole 612 to complete the connection between the elastic pull rod 5 and the ear plate 61. The second hinged hole plate 51 and the first hinged hole plate 421 are locked by bolts and nuts to complete the connection between the elastic pull rod 5 and the rotating seat 4.

[0079] The construction and assembly method of the fire-resistant and flame-retardant structure for the suspension bridge cable clamp provided in this embodiment is as follows:

[0080] like Fig.14 As shown, it is a schematic diagram of the structure after the main cable 1 is installed with the cable clamp 2.

[0081] Step 1: See attached Fig.15 , first connect the connecting sleeve 41 to the locking screw 21 near the end of the cable clamp 2 through the locking nut 412. It should be noted here that the diagram provided in this embodiment only illustrates the structure of 4 locking screws 21. In practice, there are more structures of locking screws 21. For the locking screws 21 in the middle that do not need to be connected to the annular fireproof cover 6, conventional protective caps can be used for locking protection. After the connecting sleeve 41 is connected, fireproof sealant is injected into the gap inside the connecting sleeve 41.

[0082] Step 2: See attached Fig.16 , install the rotating head 42, directly snap it onto the connecting sleeve 41, and then inject fireproof sealant into the rotating head 42 through the injection hole 423.

[0083] Step 3: See attached Fig.17 A fireproof sealing ring 3 is sleeved on the main cable 1 to fit the gap between the end of the cable clamp 2 and the main cable 1.

[0084] Step 4: See attached Fig.18 , an annular fireproof cover 6 is assembled on both sides of the cable clamp.

[0085] Step 5: See attached Fig.19 , the elastic pull rod 5 is connected between the ear plate 61 of the annular fireproof cover 6 and the first hinged hole plate 421 to complete the assembly of the overall structure.

[0086] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0087] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fire-resistant and flame-retardant structure for a cable clamp of a suspension bridge, comprising a main cable (1), and a cable clamp (2) fixed to the main cable (1), wherein the gap between the two ends of the cable clamp (2) and the main cable (1) is filled with a fire-resistant sealant; characterized in that: Also includes: A fireproof sealing ring (3); the fireproof sealing ring (3) is sleeved on the main cable (1) and fits into the gap between the end of the cable clamp (2) and the main cable (1); A rotating seat (4); the rotating seat (4) is connected to a locking screw (21) near the end of the cable clamp (2); An elastic pull rod (5); one end of the elastic pull rod (5) is hinged to the rotating part of the rotating seat (4) and faces the outer side of the end of the cable clamp (2); an annular fireproof cover (6); the annular fireproof cover (6) is sleeved on the outside of the head end of the cable clamp (2), and is connected to the end of the elastic pull rod (5) away from the rotating seat (4), and the annular fireproof cover (6) is pressed against the fireproof sealing ring (3) by the elastic tension of the elastic pull rod (5); The rotating seat (4) comprises a connecting sleeve (41) and a rotating head (42); a locking nut (412) is fixed to the inner side of the connecting sleeve (41) via a plurality of connecting rods (411), and the locking nut (412) is connected to the locking screw (21), so that the connecting sleeve (41) is pressed against the cable clamp (2); the rotating head (42) is clamped with the top edge of the connecting sleeve (41) and can rotate relative to the connecting sleeve (41), and a first hinged hole plate (421) is provided on the side wall of the rotating head (42).

2. The fire-resistant and flame-retardant structure for a suspension bridge cable clamp according to claim 1, characterized in that: The connecting sleeve (41) and the rotating head (42) are both made of stainless steel, and the surfaces are coated with an ablation layer.

3. The fire-resistant and flame-retardant structure for a suspension bridge cable clamp according to claim 1, characterized in that: The internal cavities of the connecting sleeve (41) and the rotating head (42) are filled with fireproof sealant.

4. A fire-resistant and flame-retardant structure for a suspension bridge cable clamp according to any one of claims 1 to 3, characterized in that: One end of the elastic pull rod (5) facing the rotating seat (4) has a second hinged hole plate (51) for connecting to the first hinged hole plate (421).

5. The fire-resistant and flame-retardant structure for a suspension bridge cable clamp according to claim 1, characterized in that: The elastic pull rod (5) is a double-layer sleeve structure connected by a tension spring (52).

6. The fire-resistant and flame-retardant structure for a suspension bridge cable clamp according to claim 1, characterized in that: The annular fireproof cover (6) has an ear plate (61) corresponding to the elastic pull rod (5), and one end of the elastic pull rod (5) away from the rotating seat (4) is fixedly connected to the ear plate (61) by a screw (53).

7. The fire-resistant and flame-retardant structure for a suspension bridge cable clamp according to claim 1, characterized in that: A fireproof layer (7) is bonded and fixed to the inner side of the annular fireproof cover (6).

8. The fire-resistant and flame-retardant structure for a suspension bridge cable clamp according to claim 1, characterized in that: The annular fireproof cover (6) is a shell structure composed of two half shells (62), and the two half shells (62) are fastened together by bolts (63).

9. The fire-resistant and flame-retardant structure for a suspension bridge cable clamp according to claim 1, characterized in that: The annular fireproof cover (6) is made of stainless steel, and the surface is coated with an ablative layer.

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