A safety device for a boarding ladder hoist mechanism

Abstract

The utility model discloses a kind of ship ladder lifting mechanism steel wire rope break brake safety devices, including trigger mechanism and clamping mechanism, trigger mechanism is connected with clamping mechanism by steel rope, clamping mechanism is symmetrically arranged on guide rail along ship ladder, and the working end of clamping mechanism is linked with trigger mechanism, and trigger mechanism is connected with counterweight steel rope;Trigger mechanism includes trigger portion symmetrically arranged with 2 counterweight steel ropes, and intermediate link is arranged between two trigger portions;The scheme is combined with the structural characteristics of ship ladder lifting mechanism, and the track front wing plate clamping mechanism of break brake safety device selects sliding wedge type safety tongs clamping structure, is installed in the bottom of ship ladder lifting mechanism, and interlocking mechanism is designed to make safety tongs and lifting mechanism top traction steel wire rope stroke linkage, once steel wire rope breaks, interlocking mechanism responds immediately, safety tongs inner wedge block closes and clamps ship ladder lifting track flange, and lifting mechanism stops falling.The mechanism structure is simple, safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a steel wire rope breakage braking safety device for a boarding ladder lifting mechanism. Background Technology

[0002] Large oil tanker terminals often have discontinuous decks at high elevations, resulting in frequent and significant rocking and rolling of ships during operations. To expedite loading and unloading operations and ensure the safety of personnel boarding and disembarking, tower-type boarding ladders with lifting mechanisms are essential. These ladders use steel wire ropes to move floors, but in the event of a broken wire rope, the ladder needs to brake immediately to prevent a fall and subsequent accident. Therefore, a wire rope breakage braking safety device needs to be installed on the ladder to provide this protective function.

[0003] In the event of a stall in the boarding ladder lifting system or an accidental breakage of the wire rope, the wire rope breakage braking safety device can automatically lock the lifting frame within the tower rail, stopping it at the operating position and preventing it from falling. This is an important safety protection device for the lifting mechanism. When the lifting mechanism's wire rope 52 is connected to the connecting plate 54 via the shackle 53, the connecting plate 54, the diagonal bar 55, and the scissor fork 57 are assembled into a linkage mechanism by the mounting bracket 56. A double linkage mechanism is generated on both sides of the rail 51 through the intermediate connecting rod, and the tension spring 58 generates a certain pre-tension force on the linkage mechanism. When the wire rope 52 breaks, the pre-tension force generated by the tension spring will actuate the entire linkage mechanism, causing the scissor fork 57 to rotate upward and generate lateral displacement, inserting into the pre-cut slot in the rail 51 to achieve braking, thus suspending the entire lifting mechanism in the braking position.

[0004] To achieve the above braking function, the breaking brake safety device requires rectangular slots to be cut at fixed intervals on the web of the tower lifting mechanism track so that the scissor fork can be inserted into the slots during the braking process. The slots on the side of the lifting track will weaken the strength of the track structure. Moreover, in order to ensure the verticality and parallelism of the track, the processing and manufacturing process of the lifting guide rail will be greatly increased. Furthermore, after the safety device brakes and the scissor fork is inserted into the track, it is easy for jamming to occur on site, which will bring difficulties to later maintenance. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a steel wire rope breakage braking safety device for a boarding ladder lifting mechanism. This solves the problem in the prior art that holes need to be drilled in the web of the lifting rail during the steel wire rope braking process in the boarding ladder lifting system, which increases manufacturing difficulty, greatly increases the processing and manufacturing process of the lifting guide rail, and also brings difficulties to later maintenance.

[0006] This utility model is achieved through the following solution:

[0007] A safety device for braking the steel wire rope of a boarding ladder lifting mechanism includes a triggering mechanism and a clamping mechanism. The triggering mechanism and the clamping mechanism are connected by a steel rope. The clamping mechanism is symmetrically arranged on the guide rail along the boarding ladder. The working end of the clamping mechanism is linked to the triggering mechanism. The triggering mechanism is connected to a counterweight steel rope.

[0008] Based on the structure of the above-mentioned steel wire rope breakage braking safety device for a boarding ladder lifting mechanism, the triggering mechanism includes triggering parts symmetrically arranged with two counterweight steel ropes, and an intermediate connecting rod is provided between the two triggering parts; the triggering part includes a main connecting plate, a first inclined rod, a second inclined rod, a mounting bracket, and a tension spring. The main connecting plate is hinged to one end of the first inclined rod and the second inclined rod respectively, and the other ends of the first inclined rod and the second inclined rod are coaxially mounted on the mounting bracket. The end of the first inclined rod or the second inclined rod connected to the main connecting plate is connected to one end of the tension spring, and the other end of the tension spring is connected to the mounting bracket.

[0009] Based on the structure of the above-mentioned steel wire rope breakage braking safety device for a boarding ladder lifting mechanism, at least one of the triggering parts is provided with a trigger rod. The trigger rod is connected to the ends of the first and second inclined rods away from the main mounting plate, respectively. Under the change of the force of the counterweight steel rope, the trigger rod will rotate around the rotation point as the first or second inclined rod rotates.

[0010] Based on the structure of the above-mentioned steel wire rope breakage braking safety device for a boarding ladder lifting mechanism, the clamping mechanism includes a left clamp seat, a right clamp seat, a clamp seat adjusting rod, a trigger block, a rotating shaft, and a tension spring; the rotating shaft is disposed in the left and right clamp seats, the tension spring is disposed in the clamp seat where the rotating shaft is located, the tension spring is sleeved on the rotating shaft, the trigger block is connected to the part of the rotating shaft protruding outside the clamp seat on one side, and the trigger block is connected to the trigger rod as a whole by a steel rope.

[0011] Based on the structure of the above-mentioned steel wire rope breakage braking safety device for a boarding ladder lifting mechanism, the clamp seat adjusting rod is obliquely arranged between the left clamp seat and the right clamp seat, and an adjusting block is provided between the clamp seat adjusting rod and the rotating shaft. The adjusting block is fixedly connected to the rotating shaft, and the two ends of the clamp seat adjusting rod are respectively connected to the adjusting block.

[0012] Based on the structure of the above-mentioned steel wire rope breakage braking safety device for a boarding ladder lifting mechanism, the clamp seat adjusting rod includes a first connecting end, a second connecting end, and an adjusting sleeve; the first connecting end and the second connecting end are threadedly connected to the adjusting sleeve, and the second connecting end is provided with multiple adjusting holes.

[0013] Based on the structure of the above-mentioned steel wire rope breakage braking safety device for a boarding ladder lifting mechanism, the left and right clamp seats have the same internal configuration, both including guide plates and wedge-shaped clamping blocks. The guide plates are symmetrically arranged in the clamp seats, and guide slopes are provided on the guide plates. The guide slopes between the two guide plates form a guide cavity. The wedge-shaped clamping blocks are disposed in the guide cavity, and the ends of the wedge-shaped clamping blocks are connected to the rotating shaft. Under the rotation of the rotating shaft, the wedge-shaped clamping blocks move towards each other in the guide cavity.

[0014] Based on the structure of the above-mentioned safety device for braking the broken wire rope of a boarding ladder lifting mechanism, the wedge-shaped clamping block is provided with clamping spikes.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] 1. In this solution, the triggering mechanism is connected to the counterweight steel rope, and the triggering mechanism is connected to the clamping mechanism through the steel rope, so as to realize real-time linkage of the status of the counterweight steel rope. When the counterweight steel rope encounters an unexpected situation, it can respond in real time. For example, when the counterweight steel rope is slack, broken, or tightened, the triggering mechanism will respond in real time, thereby linking and controlling the clamping mechanism to achieve clamping or releasing of the rail.

[0017] 2. This solution, taking into account the structural characteristics of the boarding ladder lifting mechanism, selects a sliding wedge-type safety clamp structure for the track front wing plate clamping mechanism of the break-braking safety device. This structure is installed at the bottom of the boarding ladder lifting mechanism and an interlocking mechanism is designed to link the safety clamp with the travel of the traction steel wire rope at the top of the lifting mechanism. If the steel wire rope breaks, the interlocking mechanism responds immediately, the wedge-shaped block inside the safety clamp closes, clamping the boarding ladder lifting track wing flange, and the lifting mechanism stops falling. This mechanism is simple in structure and safe and reliable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0019] Figure 2 This is a side view of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the clamping mechanism in this utility model;

[0021] Figure 4 This is the structural intention of the left clamp seat in this utility model;

[0022] Figure Descriptions: 1. Triggering Mechanism; 2. Clamping Mechanism; 3. Steel Rope; 4. Counterweight Steel Rope; 101. Intermediate Connecting Rod; 102. Main Connecting Plate; 103. First Diagonal Rod; 104. Second Diagonal Rod; 105. Mounting Bracket; 106. Tension Spring; 107. Trigger Rod; 201. Left Clamp Seat; 202. Right Clamp Seat; 203. Clamp Seat Adjusting Rod; 204. Trigger Block; 205. Rotating Shaft; 206. Tension Spring; 2 07. Adjusting block; 208. First connecting end; 209. Second connecting end; 210. Adjusting sleeve; 211. Adjusting hole; 212. Guide plate; 213. Wedge clamping block; 214. Guide cavity; 215. Clamping spike; 51. Lifting guide rail; 52. Lifting wire rope; 53. Shackle; 54. Connecting plate; 55. Diagonal bar; 56. Mounting bracket; 57. Scissor fork; 58. Tension spring; 59. Intermediate connecting rod. Detailed Implementation

[0023] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0024] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0027] like Figures 1-4 As shown, this utility model provides a technical solution:

[0028] A safety device for braking the steel wire rope of a boarding ladder lifting mechanism, including at least a triggering mechanism 1 and a clamping mechanism 2. The triggering mechanism 1 and the clamping mechanism 2 are connected by a steel rope 3. The clamping mechanism 2 is symmetrically arranged on the guide rail along the boarding ladder. The working end of the clamping mechanism 2 is linked with the triggering mechanism 1. The triggering mechanism 1 is connected to the counterweight steel rope 4.

[0029] Based on the above mechanism, by connecting the triggering mechanism 1 to the counterweight steel rope 4, and the triggering mechanism 1 to the clamping mechanism 2 via the steel rope 3, the real-time linkage of the state of the counterweight steel rope 4 can be realized. When the counterweight steel rope 4 encounters an unexpected situation, it can respond in real time. For example, when the counterweight steel rope 4 is slack, broken, or tightened, the triggering mechanism 1 will respond in real time, thereby linking and controlling the clamping mechanism 2 to realize the clamping or release of the rail.

[0030] As an example, the triggering mechanism 1 may include triggering parts symmetrically arranged with the two counterweight steel ropes 4, and an intermediate connecting rod 101 is provided between the two triggering parts to achieve linkage between the triggering parts; the triggering part includes a main connecting plate 102, a first inclined rod 103, a second inclined rod 104, a mounting bracket 105, and a tension spring 106. The main connecting plate 102 is hinged to one end of the first inclined rod 103 and the second inclined rod 104 respectively. The other ends of the first inclined rod 103 and the second inclined rod 104 are coaxially mounted on the mounting bracket 105. The end of the first inclined rod 103 or the second inclined rod 104 connected to the main connecting plate 102 is connected to one end of the tension spring 106. The other end of the tension spring 106 is connected to the mounting bracket 105. When the counterweight steel rope 4 is stretched, the tension spring 106 is in a stretched state.

[0031] At least one triggering part is provided with a trigger rod 107, which is connected to the ends of the first inclined rod 103 and the second inclined rod 104 away from the main mounting plate. Under the change of force of the counterweight steel rope 4, the trigger rod 107 will rotate around the rotation point as the first inclined rod 103 or the second inclined rod 104 rotates.

[0032] That is, when one of the counterweight steel ropes 4 becomes slack or breaks, the tension spring 106 pulls back the first inclined rod 103, and the first inclined rod 103 and the second inclined rod 104 eventually drive the trigger rod 107 to move upward, pulling the steel rope 3 connected to the trigger rod 107 and the clamping mechanism 2 upward.

[0033] As an example, the clamping mechanism 2 may include a left clamp seat 201, a right clamp seat 202, a clamp seat adjusting rod 203, a trigger block 204, a rotating shaft 205, and a tension spring 206; the rotating shaft 205 is disposed in the left clamp seat 201 and the right clamp seat 202, and the tension spring 206 is disposed in the clamp seat where the rotating shaft 205 is located. The tension spring 206 is sleeved on the rotating shaft 205, so that the rotating shaft 205 can be reset after rotation; the trigger block 204 is connected to the part of the rotating shaft 205 protruding outside the clamp seat on one side, and the trigger block 204 is connected to the trigger rod 107 as a whole by a steel rope 3.

[0034] The clamp adjustment rod 203 is obliquely positioned between the left clamp 201 and the right clamp 202. An adjustment block 207 is provided between the clamp adjustment rod 203 and the rotating shaft 205. The adjustment block 207 is fixedly connected to the rotating shaft 205. The two oblique ends of the clamp adjustment rod 203 are respectively connected to the adjustment block 207, so as to realize the linkage and adjustment of the left clamp 201 and the right clamp 202.

[0035] As an example, the clamp seat adjusting rod 203 may include a first connecting end 208, a second connecting end 209, and an adjusting sleeve 210; the first connecting end 208 and the second connecting end 209 are threadedly connected to the adjusting sleeve 210, and the length of the entire clamp seat adjusting rod 203 can be adjusted by rotating the first connecting end 208 or the second connecting end 209. The second connecting end 209 is provided with a plurality of adjusting holes 211, and the second connecting end 209 is connected to the connecting block through the adjusting holes 211, so as to adapt to the adjustment of boarding ladders of different specifications.

[0036] Based on the above structure, when the trigger rod 107 rotates, it triggers the trigger block 204 through the steel rope 3, which in turn causes the rotating rods in the left clamp seat 201 and right clamp seat 202 to rotate. The rotating rod triggers the internal wedge-shaped clamping block 213 to clamp the guide rail and achieve safe braking. When the counterweight steel rope 4 is stressed again, the tension spring 206 can rotate to reset the rotating rod, and the wedge-shaped clamping block 213 unlocks the clamping state of the guide rail.

[0037] As an example, the left clamp seat 201 and the right clamp seat 202 have the same internal configuration, both including a guide plate 212 and a wedge-shaped clamping block 213. The guide plates 212 are symmetrically arranged in the clamp seat, and a guide slope is provided on the guide plate 212. The guide slope between the two guide plates 212 forms a guide cavity 214. The wedge-shaped clamping block 213 is disposed in the guide cavity 214. The end of the wedge-shaped clamping block 213 is connected to the rotating shaft 205. Under the rotation of the rotating shaft 205, the wedge-shaped clamping block 213 moves towards each other in the guide cavity 214 to achieve clamping of the guide rail.

[0038] The wedge-shaped clamping block 213 may be provided with clamping protrusions 215, which can be used to forcibly clamp and fix the guide rail surface.

[0039] This design, taking into account the structural characteristics of the boarding ladder lifting mechanism, employs a sliding wedge-type safety clamping structure for the track front wing plate clamping mechanism of the break-braking safety device. This structure is installed at the bottom of the boarding ladder lifting mechanism and features an interlocking mechanism that links the safety clamp to the travel of the traction steel wire rope at the top of the lifting mechanism. If the steel wire rope breaks, the interlocking mechanism responds immediately, closing the wedge-shaped block inside the safety clamp and locking it against the boarding ladder lifting track wing, thus stopping the lifting mechanism from falling. This mechanism is simple in structure and safe and reliable.

[0040] How to use this device:

[0041] After the trigger mechanism 1 disconnects from the wire rope, it activates, lifting the linked wire rope and causing the trigger block 204 to rotate upwards. Simultaneously, the left and right clamp seats 201 and 202 move synchronously via the left and right clamp seat adjusting rods 203. At this time, the left and right clamp seats 201 and 202 rotate coaxially with the trigger block 204, and the wedge blocks inside are lifted up within the guide plate 212. The distance between the left and right wedge blocks decreases, and the wedge blocks tightly grip the guide rail wing plate, thus producing a braking effect. When the counterweight wire rope is lifted again under the force, the bottom safety clamp linkage rod rotates in the opposite direction under the action of the tension spring 206 inside the safety clamp, causing the wedge blocks to slide downwards. At this time, the distance between the left and right wedge blocks increases, thus releasing the brake.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A safety device for braking the steel wire rope of a boarding ladder lifting mechanism, characterized in that: The device includes a triggering mechanism and a clamping mechanism. The triggering mechanism and the clamping mechanism are connected by steel cables. The clamping mechanism is symmetrically arranged on the guide rail along the boarding ladder. The working end of the clamping mechanism is linked to the triggering mechanism. The triggering mechanism is connected to the counterweight steel cable. The triggering mechanism includes triggering parts symmetrically arranged with two counterweight steel cables, and an intermediate connecting rod is provided between the two triggering parts. The triggering part includes a main connecting plate, a first inclined rod, a second inclined rod, a mounting bracket, and a tension spring. The main connecting plate is hinged to one end of the first inclined rod and the second inclined rod, respectively. The other ends of the first inclined rod and the second inclined rod are coaxially mounted on the mounting bracket. The end of the first or second inclined rod connected to the main connecting plate is connected to one end of the tension spring, and the other end of the tension spring is connected to the mounting bracket.

2. The safety device for braking the broken wire rope of a boarding ladder lifting mechanism as described in claim 1, characterized in that: At least one of the triggering parts is provided with a trigger rod, which is connected to the ends of the first and second inclined rods away from the main mounting plate. Under the change of the force of the counterweight steel rope, the trigger rod is set to rotate around the rotation point as the first or second inclined rod rotates.

3. The safety device for braking the broken wire rope of a boarding ladder lifting mechanism as described in claim 2, characterized in that: The clamping mechanism includes a left clamp seat, a right clamp seat, a clamp seat adjusting rod, a trigger block, a rotating shaft, and a tension spring. The rotating shaft is disposed in the left and right clamp seats, and the tension spring is disposed in the clamp seat where the rotating shaft is located. The tension spring is sleeved on the rotating shaft. The trigger block is connected to the part of the rotating shaft that protrudes outside the clamp seat on one side. The trigger block is connected to the trigger rod as a whole by a steel rope.

4. The safety device for braking the broken wire rope of a boarding ladder lifting mechanism as described in claim 3, characterized in that: The clamp adjustment rod is obliquely disposed between the left clamp and the right clamp. An adjustment block is disposed between the clamp adjustment rod and the rotating shaft. The adjustment block is fixedly connected to the rotating shaft. Both ends of the clamp adjustment rod are respectively connected to the adjustment block.

5. The safety device for braking the broken wire rope of a boarding ladder lifting mechanism as described in claim 4, characterized in that: The clamp seat adjusting rod includes a first connecting end, a second connecting end, and an adjusting sleeve; the first connecting end and the second connecting end are threadedly connected to the adjusting sleeve, and the second connecting end is provided with a plurality of adjusting holes.

6. The safety device for braking the broken wire rope of a boarding ladder lifting mechanism as described in claim 5, characterized in that: The left and right clamps have identical internal configurations, each including a guide plate and a wedge-shaped clamping block. The guide plates are symmetrically arranged within the clamps and have guide ramps. The guide ramps between the two guide plates form a guide cavity. The wedge-shaped clamping block is disposed in the guide cavity, and its end is connected to a rotating shaft. Under the rotation of the rotating shaft, the wedge-shaped clamping block moves towards each other within the guide cavity.

7. The safety device for braking the broken wire rope of a boarding ladder lifting mechanism as described in claim 6, characterized in that: The wedge-shaped clamping block is provided with clamping protrusions.

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