A stay cable cutting mechanism with a fixing function and its construction method

Abstract

The present invention belongs to the technical field of bridges, and discloses a stay cable cutting mechanism with a fixing function and its construction method, including a bridge deck main body and a main tower. A stay cable main body is connected between the bridge deck main body and the main tower. The mechanism further includes: a base assembly placed on the bridge deck main body; and a support assembly arranged on the top of the base assembly. In the present invention, a cutting device is used to cut the stay cable main body. After the stay cable main body breaks, the stay cable main body near the main tower end pulls the second clamping member, the second support frame and the sliding block to slide along the first chute under the action of its own tension and gravity. Since the end of the convex block contacts the bottom of the sliding block, the round shaft and the convex block are used to increase the sliding resistance of the sliding block, so that the sliding block slowly slides with the end of the stay cable main body, and the stay cable main body slowly descends after breaking, avoiding the phenomenon that the stay cable main body breaks due to excessive tension and impacts the bridge deck and causes damage.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridges, and particularly relates to a stay cable cutting mechanism with a fixing function and its construction method. Background Art

[0002] Stay cables are indispensable key components in modern bridge engineering, mainly used in cable-stayed bridges. Through their high-strength tensile force, they balance the gravity of the main girder and external loads, thereby realizing the spanning function of the bridge. With the continuous increase in bridge spans, the design and construction technologies of stay cables are also constantly evolving. However, during the operation of the bridge, due to environmental factors, material aging, or accidental damage, etc., stay cables may have problems such as corrosion, fracture, or relaxation, seriously affecting the safety and stability of the bridge. The replacement and maintenance of stay cables have become important contents of bridge maintenance; traditional cutting methods usually adopt manual operations (such as abrasive wheel cutting machines), and it is difficult to effectively fix the stay cable during the cutting process of traditional cutting equipment, resulting in unstable cutting. Moreover, the stay cable has a very high tension in the tensioned state, and direct separation causes the sudden release of the tension, which impacts the bridge structure, thus there are certain safety hazards. Therefore, a stay cable cutting mechanism with a fixing function and its construction method are proposed. Summary of the Invention

[0003] To solve the problems raised in the above background art, the present invention provides a stay cable cutting mechanism with a fixing function and its construction method, which solves the problem that the existing stay cable has a very high tension in the tensioned state, and direct separation causes the sudden release of the tension, which impacts the bridge structure.

[0004] To achieve the above object, the present invention provides the following technical solution: A stay cable cutting mechanism with a fixing function, including a bridge deck main body and a main tower, with a stay cable main body connected between the bridge deck main body and the main tower, and further including:

[0005] A base assembly, which is fixed on the bridge deck main body;

[0006] A support assembly, which is arranged on the top of the base assembly and is used for installing cutting equipment;

[0007] A clamping assembly, which is arranged on the top of the base assembly. The support assembly and the clamping assembly are used for clamping the stay cable main body, and the cutting equipment is located between the support assembly and the clamping assembly;

[0008] A deceleration assembly, which is arranged inside the base assembly;

[0009] Among them, the clamping assembly includes two sliding blocks sliding inside the base assembly. A baffle is fixedly installed at the bottom of the sliding block, and a roller is arranged between the baffle and the sliding block. The two sliding blocks are connected by a connecting plate, and a second clamping member is installed at the top of the connecting plate through a second support frame;

[0010] The deceleration assembly includes a circular shaft movably installed inside the base assembly. A convex block is fixedly installed on the outer part of the circular shaft, and the top end of the convex block contacts the bottom of the sliding block. The convex block is made of rubber material;

[0011] The cutting device is located between the support assembly and the clamping assembly to cut the main cable body. When the main cable body breaks, it drives the sliding block to slide along the base assembly towards one end under the action of its own tension.

[0012] Preferably, the base assembly includes a main beam placed on the top of the bridge deck main body, and a first chute is opened inside the main beam;

[0013] The sliding block slides at the upper end inside the first chute, and the circular shaft and the convex block are located at the lower end of the first chute.

[0014] Preferably, the convex block is inclined towards the direction of the main tower, and the sliding direction of the sliding block along the first chute is the same as the inclination direction of the convex block.

[0015] Preferably, the support assembly includes a docking plate fixedly installed on the main beam, and a first clamping member is movably installed on the docking plate through a first support frame;

[0016] A rubber pad is arranged on the inner wall of the first clamping member, and the second clamping member has the same structure as the first clamping member.

[0017] Preferably, the support assembly further includes a fixed frame fixedly installed on the side of the first clamping member. A guide rod is arranged inside the fixed frame, and a docking block slides on the guide rod. A cutting device is installed on the top of the docking block.

[0018] Preferably, when the sliding block slides along the first chute to be close to the support assembly, the fixed frame is fixedly connected to the second clamping member through a docking ear by bolts, so that the fixed frame, the first clamping member, the second clamping member and the inclination direction of the main cable body are the same.

[0019] Preferably, the deceleration assembly further includes a fixed cover fixedly installed on the side of the main beam. A fixed rod is fixedly installed on the side of the circular shaft, and a coil spring is fixedly installed on the inner wall of the fixed cover. The coil spring is fixedly connected to the outside of the fixed rod;

[0020] An activity cover is fixedly installed on the outside of the fixed rod, and the activity cover is movably sleeved on the outside of the fixed cover.

[0021] Preferably, a finger rod is fixedly installed on the outside of the movable cover, a lug is fixedly installed on the periphery of the fixed cover, a second sliding groove is opened on the lug, a slider is movably arranged inside the second sliding groove, a threaded rod is threadedly connected to the slider, a pressing plate is movably sleeved on the outside of the threaded rod, and a limiting ring for limiting the pressing plate is fixedly installed on the outside of the threaded rod;

[0022] The round shaft and the convex block are in an inclined state under the action of the coil spring, and the round shaft, the convex block, the movable cover and the finger rod are limited by the threaded rod.

[0023] The present invention also provides a construction method for cutting stay cables with a fixing function, including the following steps:

[0024] S1. Clamp the stay cable main body through the support assembly and the second clamping member, install the cutting device on the support assembly, and cut the stay cable main body through the cutting device;

[0025] S2. After the stay cable main body breaks, the stay cable main body near the main tower end pulls the second clamping member, the second support frame and the sliding block to slide along the first sliding groove under the action of its own tension and gravity;

[0026] S3. Since the end of the convex block contacts the bottom of the sliding block, the round shaft and the convex block are used to increase the sliding resistance of the sliding block, so that the sliding block slowly slides with the end of the stay cable main body;

[0027] S4. Since the support assembly and the clamping assembly are clamped on the outside of the stay cable main body, when the sliding block slides along the first sliding groove to one end close to the main tower, the support assembly is connected to the stay cable main body close to one end of the bridge deck main body, and the support assembly is fixedly installed at one end of the base assembly, so as to prevent the main beam from tilting during the sliding of the sliding block and the stay cable main body close to the main tower end along the first sliding groove.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] The present invention cuts the stay cable main body through the cutting device. After the stay cable main body breaks, the stay cable main body near the main tower end pulls the second clamping member, the second support frame and the sliding block to slide along the first sliding groove under the action of its own tension and gravity. Since the end of the convex block contacts the bottom of the sliding block, the round shaft and the convex block are used to increase the sliding resistance of the sliding block, so that the sliding block slowly slides with the end of the stay cable main body, and the stay cable main body slowly descends after breaking, avoiding the phenomenon that the stay cable main body breaks due to excessive tension and hits the bridge deck and causes damage;

[0030] The present invention clamps to the outside of the stay cable body through the first clamping member. The sliding block slides along the first chute to approach the fixed frame end. The fixed frame is fixedly connected to the second clamping member by means of the docking ear with bolts. The second clamping member clamps to the outside of the stay cable body. The stay cable body is clamped and fixed by the first clamping member and the second clamping member. The cutting device is installed on the docking block. Since the fixed frame is installed in the same inclination direction as the first clamping member and the second clamping member, the cutting device is kept parallel to the cross-section of the stay cable body. When the stay cable body is cut by the cutting device, it can ensure that the cross-section of the stay cable body is smoother;

[0031] The present invention rotates the push finger rod, the movable cover, the fixed rod, the round shaft and the convex block, so that the convex block always remains in contact with the bottom of the sliding block. At this time, rotating the threaded rod can drive the slider to slide upward along the second chute and contact the finger rod. Rotating the threaded rod in the reverse direction can limit the finger rod and ensure that the convex block is in contact with the bottom of the sliding block. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall external structure of the present invention;

[0033] Figure 2 is a schematic diagram of the external structures of the base assembly, the support assembly, the clamping assembly and the deceleration assembly of the present invention;

[0034] Figure 3 is a disassembled structural schematic diagram of the clamping assembly and the base assembly of the present invention;

[0035] Figure 4 is a schematic diagram of the cooperation structure between the support assembly and the clamping assembly of the present invention;

[0036] Figure 5 is a schematic diagram of the sectional structure of the clamping assembly and the base assembly of the present invention;

[0037] Figure 6 is the present invention Figure 5 magnified structural schematic diagram at position A;

[0038] Figure 7 is a schematic diagram of the external structure of the clamping assembly of the present invention;

[0039] Figure 8 is a schematic diagram of the cooperation structure between the sliding block and the convex block of the present invention;

[0040] Figure 9 is a schematic diagram of the cooperation structure between the base assembly, the clamping assembly and the deceleration assembly of the present invention;

[0041] Figure 10 is a disassembled structural schematic diagram of the base assembly, the clamping assembly and the deceleration assembly of the present invention;

[0042] Figure 11Schematic diagram of the disassembly structure of the speed reduction component of the present invention;

[0043] Figure 12 Schematic diagram of the cooperation structure between the lug and the slider of the present invention.

[0044] In the figure: 1, bridge deck main body; 2, main tower; 3, main cable of stay cable; 4, base assembly; 41, main beam; 42, first chute; 5, support assembly; 51, fixing frame; 52, guide rod; 53, docking ear; 54, docking block; 55, docking plate; 56, first support frame; 57, first clamping member; 6, clamping assembly; 61, second clamping member; 62, second support frame; 63, sliding block; 64, connecting plate; 65, baffle; 66, roller; 7, speed reduction component; 71, round shaft; 72, convex block; 73, movable cover; 74, fixed cover; 75, torsion spring; 711, finger rod; 712, lug; 713, second chute; 714, slider; 715, limit ring; 716, pressure application plate; 717, threaded rod. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] As Figures 1 to 12 shown, the present invention provides a stay cable cutting mechanism with a fixing function, including a bridge deck main body 1 and a main tower 2. A main cable of stay cable 3 is connected between the bridge deck main body 1 and the main tower 2. It further includes:

[0047] A base assembly 4, and the base assembly 4 is fixed on the bridge deck main body 1;

[0048] A support assembly 5, the support assembly 5 is arranged on the top of the base assembly 4, and the support assembly 5 is used for installing a cutting device;

[0049] A clamping assembly 6, the clamping assembly 6 is arranged on the top of the base assembly 4. The support assembly 5 and the clamping assembly 6 are used for clamping the main cable of stay cable 3, and the cutting device is located between the support assembly 5 and the clamping assembly 6;

[0050] A speed reduction component 7, and the speed reduction component 7 is arranged inside the base assembly 4;

[0051] Among them, the clamping assembly 6 includes two sliding blocks 63 that slide inside the base assembly 4. A baffle 65 is fixedly installed at the bottom of the sliding block 63. A roller 66 is arranged between the baffle 65 and the sliding block 63. The two sliding blocks 63 are connected by a connecting plate 64. The top of the connecting plate 64 is installed with a second clamping member 61 through a second support frame 62;

[0052] The deceleration assembly 7 includes a circular shaft 71 movably installed inside the base assembly 4. A convex block 72 is fixedly installed on the outside of the circular shaft 71. The top end of the convex block 72 contacts the bottom of the sliding block 63. The convex block 72 is made of rubber material;

[0053] The cutting device is located between the support assembly 5 and the clamping assembly 6 to cut the stay cable body 3. When the stay cable body 3 breaks, it drives the sliding block 63 to slide along the base assembly 4 towards one end under the action of its own tension;

[0054] The base assembly 4 includes a main beam 41 fixed to the top of the bridge deck body 1. A first chute 42 is opened inside the main beam 41;

[0055] The sliding block 63 slides at the upper end inside the first chute 42. The circular shaft 71 and the convex block 72 are located at the lower end of the first chute 42;

[0056] The convex block 72 is inclined towards the direction of the main tower 2. The sliding direction of the sliding block 63 along the first chute 42 is the same as the inclination direction of the convex block 72.

[0057] The stay cable body 3 is clamped by the support assembly 5 and the second clamping member 61. The cutting device is installed on the support assembly 5. The stay cable body 3 is cut by the cutting device. After the stay cable body 3 breaks, the stay cable body 3 near the main tower 2 end pulls the second clamping member 61, the second support frame 62 and the sliding block 63 to slide along the first chute 42 under the action of its own tension and gravity. Since the end of the convex block 72 contacts the bottom of the sliding block 63, the circular shaft 71 and the convex block 72 are used to increase the sliding resistance of the sliding block 63, so that the sliding block 63 slowly slides with the end of the stay cable body 3. After the stay cable body 3 breaks, it slowly descends, avoiding the phenomenon that the stay cable body 3 breaks due to excessive tension and causes damage to the bridge deck;

[0058] At the same time, since the support assembly 5 and the clamping assembly 6 clamp the outside of the stay cable body 3, when the sliding block 63 slides to one end close to the main tower 2 along the first chute 42, it is connected to the stay cable body 3 near the bridge deck body 1 end through the support assembly 5. And the support assembly 5 is fixedly installed at one end of the base assembly 4. The stability of the main beam 41 is improved through the support assembly 5, the stay cable body 3 and the bridge deck body 1, avoiding the phenomenon that the main beam 41 tilts during the sliding process of the sliding block 63 and the stay cable body 3 near the main tower 2 end along the first chute 42.

[0059] It is hereby stated that the design specifications of the base assembly 4 and the clamping assembly 6 can withstand the tension released by the main cable body 3, and the clamping assembly 6 can carry a load of at least 1000 kN.

[0060] As Figures 1 - 4 shown, the support assembly 5 includes a docking plate 55 fixedly installed on the main beam 41, and the docking plate 55 is movably installed with a first clamping member 57 through a first support frame 56;

[0061] The inner wall of the first clamping member 57 is provided with a rubber pad, and the structure of the second clamping member 61 is the same as that of the first clamping member 57;

[0062] The support assembly 5 further includes a fixing frame 51 fixedly installed on the side of the first clamping member 57. A guide rod 52 is arranged inside the fixing frame 51, and a docking block 54 slides on the guide rod 52. A cutting device is installed on the top of the docking block 54;

[0063] When the sliding block 63 slides along the first chute 42 to be close to the support assembly 5, the fixing frame 51 is fixedly connected to the second clamping member 61 through the docking ear 53 by means of bolts, so that the fixing frame 51, the first clamping member 57, the second clamping member 61 and the inclined direction of the main cable body 3 are the same.

[0064] The first clamping member 57 clamps the outside of the main cable body 3. The sliding block 63 slides along the first chute 42 to be close to the end of the fixing frame 51. The fixing frame 51 is fixedly connected to the second clamping member 61 through the docking ear 53 by means of bolts. The second clamping member 61 clamps the outside of the main cable body 3. The main cable body 3 is clamped and fixed by the first clamping member 57 and the second clamping member 61. The cutting device is installed on the docking block 54. Since the fixing frame 51 is installed in the same inclined direction as the first clamping member 57 and the second clamping member 61, the cutting device is parallel to the cross-section of the main cable body 3. When the main cable body 3 is cut by the cutting device, it can ensure that the cross-section of the main cable body 3 is smoother.

[0065] As Figures 5 - 12 shown, the deceleration assembly 7 further includes a fixing cover 74 fixedly installed on the side of the main beam 41. A fixing rod is fixedly installed on the side of the round shaft 71. A coil spring 75 is fixedly installed on the inner wall of the fixing cover 74, and the coil spring 75 is fixedly connected to the outside of the fixing rod;

[0066] A movable cover 73 is fixedly installed on the outside of the fixing rod, and the movable cover 73 is movably sleeved on the outside of the fixing cover 74;

[0067] The outside of the movable cover 73 is fixedly equipped with a finger rod 711, the periphery of the fixed cover 74 is fixedly equipped with a lug 712, a second chute 713 is opened on the lug 712, a slider 714 is movably arranged inside the second chute 713, a threaded rod 717 is threadedly connected to the slider 714, a pressure application plate 716 is movably sleeved outside the threaded rod 717, and a limit ring 715 for limiting the pressure application plate 716 is fixedly installed outside the threaded rod 717;

[0068] The round shaft 71 and the convex block 72 are in an inclined state under the action of the coil spring 75, and the round shaft 71, the convex block 72, the movable cover 73 and the finger rod 711 are limited by the threaded rod 717.

[0069] The round shaft 71 and the convex block 72 are kept in an inclined state by the coil spring 75. Since the movable cover 73 is fixedly connected to the fixed rod, and the threaded rod 717 is located inside the second chute 713 to limit the finger rod 711, and at the same time limit the inclination angle of the convex block 72. When the sliding block 63 slides along the first chute 42, the sliding resistance is increased through the convex block 72 to reduce the tension of the stay cable main body 3. When the sliding block 63 slides to one end close to the main tower 2, the stay cable main body 3 on the second clamping member 61 can be removed at this time. Push the clamping assembly 6 to slide in the reverse direction to drive the convex block 72 and the round shaft 71 to rotate, so that the sliding block 63 can be normally reset. When the sliding block 63 disengages from the convex block 72, at this time the convex block 72 is reset to an inclined state under the action of the coil spring 75;

[0070] When continuously cutting the stay cable main body 3 on the bridge, and the sliding block 63 rubs against the convex block 72 for a long time, the volume of the convex block 72 gradually shrinks, driving the finger rod 711, the movable cover 73, the fixed rod, the round shaft 71 and the convex block 72 to rotate, so that the convex block 72 always keeps in contact with the bottom of the sliding block 63. At this time, rotating the threaded rod 717 can drive the slider 714 to slide upward along the second chute 713 to contact the finger rod 711, and rotating the threaded rod 717 in the reverse direction can limit the finger rod 711.

[0071] The present invention also provides a stay cable cutting construction method with a fixing function, including the following steps:

[0072] S1. Clamp the stay cable main body 3 through the support assembly 5 and the second clamping member 61. The cutting device is installed on the support assembly 5, and the stay cable main body 3 is cut through the cutting device;

[0073] S2. After the stay cable main body 3 breaks, the stay cable main body 3 at the end close to the main tower 2 drives the second clamping member 61, the second support frame 62 and the sliding block 63 to slide along the first chute 42 under the action of its own tension and gravity;

[0074] S3. Since the end of the bump 72 contacts the bottom of the slider 63, the resistance of the slider 63 sliding is increased through the round shaft 71 and the bump 72, so that the slider 63 slowly slides while carrying the end of the stay cable body 3.

[0075] S4. Since the support assembly 5 and the clamping assembly 6 clamp the outside of the stay cable body 3, when the slider 63 slides along the first chute 42 to the end close to the main tower 2, the support assembly 5 is connected to the stay cable body 3 at the end close to the bridge deck body 1, and the support assembly 5 is fixedly installed at one end of the base assembly 4, so as to prevent the main beam 41 from tilting during the process of the slider 63 and the stay cable body 3 at the end close to the main tower 2 sliding along the first chute 42.

[0076] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0077] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable-stayed cutting mechanism with a fixing function, comprising a bridge deck body (1) and a main tower (2), wherein a cable-stayed body (3) is connected between the bridge deck body (1) and the main tower (2), and characterized in that: Also includes: A base assembly (4), the base assembly (4) being fixed on the bridge deck body (1); A support assembly (5), the support assembly (5) being arranged on the top of the base assembly (4), and the support assembly (5) being used for installing a cutting device; A clamping assembly (6), wherein the clamping assembly (6) is arranged on the top of the base assembly (4), the support assembly (5) and the clamping assembly (6) are used to clamp the inclined cable body (3), and the cutting device is located between the support assembly (5) and the clamping assembly (6); A deceleration component (7), wherein the deceleration component (7) is arranged inside the base component (4); The clamping assembly (6) comprises two sliding blocks (63) sliding inside the base assembly (4); a baffle (65) is fixedly mounted on the bottom of the sliding block (63); a roller (66) is arranged between the baffle (65) and the sliding block (63); the two sliding blocks (63) are connected via a connecting plate (64); a second clamping member (61) is mounted on the top of the connecting plate (64) via a second support frame (62); The deceleration assembly (7) comprises a circular shaft (71) movably mounted inside the base assembly (4), a protrusion (72) is fixedly mounted outside the circular shaft (71), the top end of the protrusion (72) contacts the bottom end of the sliding block (63), and the protrusion (72) is made of rubber material; The cutting device is located between the support assembly (5) and the clamping assembly (6) to perform a cutting process on the inclined cable body (3); when the inclined cable body (3) is broken, the sliding block (63) is driven to slide toward one end along the base assembly (4) under the action of its own tension; The base assembly (4) comprises a main beam (41) fixed to the top of the bridge deck body (1), and a first sliding groove (42) is provided inside the main beam (41); The sliding block (63) slides at the upper end inside the first sliding groove (42), and the round shaft (71) and the protrusion (72) are located at the lower end of the first sliding groove (42).

2. The inclined cable cutting mechanism with fixing function according to claim 1 is characterized in that: The protrusion (72) is inclined in the direction toward the main tower (2), and the direction in which the sliding block (63) slides along the first sliding groove (42) is consistent with the inclination direction of the protrusion (72).

3. The inclined cable cutting mechanism with fixing function according to claim 1 is characterized in that: The support assembly (5) comprises a docking plate (55) fixedly mounted on the main beam (41), and the docking plate (55) is movably mounted with a first clamping member (57) via a first support frame (56); The inner wall of the first clamping member (57) is provided with a rubber pad, and the second clamping member (61) has the same structure as the first clamping member (57).

4. The inclined cable cutting mechanism with fixing function according to claim 3 is characterized in that: The support assembly (5) further comprises a fixing frame (51) fixedly mounted on the side of the first clamping member (57), a guide rod (52) being arranged inside the fixing frame (51), a docking block (54) being slidably mounted on the guide rod (52), and a cutting device being mounted on the top of the docking block (54).

5. The inclined cable cutting mechanism with fixing function according to claim 4 is characterized in that: When the sliding block (63) slides along the first sliding groove (42) to approach the support assembly (5), the fixing frame (51) is fixedly connected to the second clamping member (61) via the docking ear (53) with the aid of bolts, so that the fixing frame (51), the first clamping member (57), the second clamping member (61) and the inclined cable body (3) are in the same inclination direction.

6. The inclined cable cutting mechanism with fixing function according to claim 1, characterized in that: The deceleration assembly (7) further comprises a fixing cover (74) fixedly mounted on the side of the main beam (41), a fixing rod being fixedly mounted on the side of the circular shaft (71), a coil spring (75) being fixedly mounted on the inner wall of the fixing cover (74), and the coil spring (75) being fixedly connected to the outside of the fixing rod; A movable cover (73) is fixedly mounted on the outside of the fixed rod, and the movable cover (73) is movably sleeved on the outside of the fixed cover (74).

7. The inclined cable cutting mechanism with fixing function according to claim 6 is characterized in that: The movable cover (73) is fixedly provided with a finger rod (711) on the outside, the fixed cover (74) is fixedly provided with a lug (712) on the outside, the lug (712) is provided with a second slide groove (713), a slider (714) is movably provided inside the second slide groove (713), a threaded rod (717) is threadedly connected to the slider (714), a pressure plate (716) is movably sleeved on the outside of the threaded rod (717), and a limiting ring (715) for limiting the pressure plate (716) is fixedly provided on the outside of the threaded rod (717); The round shaft (71) and the protrusion (72) are in an inclined state under the action of the coil spring (75), and the round shaft (71), the protrusion (72), the movable cover (73) and the finger rod (711) are limited in position by a threaded rod (717).

8. A method for cutting a stay cable with a fixing function, using the stay cable cutting mechanism with a fixing function as claimed in claim 1, characterized in that: The following steps are involved: S1. The inclined cable body (3) is clamped by the support assembly (5) and the second clamping member (61), a cutting device is installed on the support assembly (5), and the inclined cable body (3) is cut by the cutting device; S2, after the stay cable body (3) breaks, the stay cable body (3) near the end of the main tower (2) pulls the second clamping member (61), the second support frame (62) and the sliding block (63) to slide along the first sliding groove (42) under the action of its own tension and gravity; S3, since the end of the protrusion (72) contacts the bottom of the sliding block (63), the sliding resistance of the sliding block (63) is increased through the circular shaft (71) and the protrusion (72), so that the end of the sliding block (63) carrying the inclined cable body (3) slides slowly; S4. Since the support assembly (5) and the clamping assembly (6) are clamped on the outside of the inclined cable body (3), when the sliding block (63) slides along the first slide groove (42) to the end close to the main tower (2), it is connected to the inclined cable body (3) close to the end of the bridge deck body (1) through the support assembly (5), and the support assembly (5) is fixed to one end of the base assembly (4), so as to prevent the main beam (41) from tilting when the sliding block (63) and the inclined cable body (3) close to the end of the main tower (2) slide along the first slide groove (42).

Images