An emergency braking device for a main cable construction frame and a construction frame support system

Abstract

The application discloses an emergency braking device for a main cable construction frame and a construction frame supporting system, relates to the technical field of suspension bridge main cable maintenance and maintenance, and discloses the construction frame supporting system which comprises a construction frame body hoisted on the main cable, and the emergency braking device comprises a hydraulic cylinder; an arc-shaped frame is fixedly connected with the telescopic end head of the hydraulic cylinder, and the two end faces of the arc-shaped frame are provided with sliding cavities; the number of a slide plate group is two sets, and the two sets are slidably connected with the two sliding cavities respectively; the slide plate group comprises a plurality of slide plates which are mutually superposed and slidably connected with each other, and a plurality of groups of springs corresponding to the end heads of the plurality of slide plates are arranged in the sliding cavities. The number of the emergency braking devices is two sets, and the two sets are arranged on the two sides of the main cable; the fixed end of the hydraulic cylinder is fixedly connected with the inner side of the construction frame body, and the recessed face of the arc-shaped frame faces the main cable. The application can clamp the main cable under the drive of the hydraulic cylinder, and gradually buffer brake through the multi-stage slide plates, so that the construction frame body can be quickly and stably braked when losing speed, and the safety performance is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suspension bridge main cable maintenance and repair, and more particularly to an emergency braking device for a main cable construction frame and a construction frame support system. BACKGROUND

[0002] In recent decades, bridge engineering technology has made great progress, and more and more super-long span cable bridges have been put into use. However, at the same time, a large amount of cable maintenance and detection work is brought about, and the traditional detection method is to send workers to the high altitude with equipment for detection and maintenance by a special vehicle. This method is inefficient, needs frequent lifting, and the safety of personnel cannot be guaranteed.

[0003] The applicant has filed an invention patent application entitled "Crawling Construction Platform for Suspension Bridge Main Cable and Its Travel Control Method" on January 6, 2023, which discloses a construction platform comprising a main cable, a jacking mechanism at both ends of the platform body cooperating with the main cable, a hanging mechanism on the platform body slidingly connected with the main cable, the jacking mechanism being used to realize the jacking support of the platform body relative to the main cable, the hanging mechanism being used to realize the sliding operation of the platform body relative to the main cable, the jacking mechanism and the hanging mechanism being used alternately; a traction mechanism being connected between the platform body and the main cable, the traction mechanism being used to drag the platform body to slide along the length direction of the main cable when the hanging mechanism is used. By controlling the jacking mechanism and the hanging mechanism to be used alternately, the jacking mechanism is separated from the main cable when the hanging mechanism is used, and the platform body is dragged to slide along the length direction of the main cable by the traction mechanism; when the jacking mechanism is used, the hanging mechanism is separated from the main cable, so as to adjust the position of the hanging mechanism and provide a moving space for the next dragging operation of the traction mechanism.

[0004] The above structure can better control the movement on the main cable, but in order to ensure the safe and stable operation, the applicant has made corresponding auxiliary structure measures, for example, the applicant has filed an application for a patent on the same day entitled "Combined Frame Structure with Adjustable Gravity Center and Suspension Bridge Main Cable Platform", that is, a structure for controlling the gravity center of the platform. For this reason, the applicant also noticed that the overall platform structure lacks an emergency braking device, which cannot be quickly braked when the platform is out of control, and cannot effectively ensure the safe operation of the platform.

[0005] Therefore, how to provide an emergency braking device for a main cable construction frame and a construction frame support system is a problem that needs to be solved by those skilled in the art. SUMMARY

[0006] Therefore, the present application provides an emergency braking device for a main cable construction frame and a construction frame support system, which aims to solve the above technical problems.

[0007] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0008] An emergency braking device for a main cable construction frame, comprising:

[0009] A hydraulic cylinder;

[0010] An arc-shaped frame, the outer convex surface of the arc-shaped frame is fixedly connected with the telescopic end head of the hydraulic cylinder, and the two end surfaces of the arc-shaped frame have sliding cavities;

[0011] A plurality of slide plate sets, the number of the slide plate sets is two, and the slide plate sets are respectively slidably connected with the two sliding cavities; the slide plate set comprises a plurality of slide plates which are stacked and slidably connected with each other, the lengths of the plurality of slide plates gradually increase from top to bottom, one end of the plurality of slide plates is aligned and slidably connected with the sliding cavity, a plurality of groups of springs corresponding to the ends of the plurality of slide plates are installed in the sliding cavity, and the lengths of the other ends of the plurality of slide plates are different, and the length of the slide plate facing the concave surface of the arc-shaped frame is the longest.

[0012] Through the above technical scheme, the emergency braking device provided by the application is mainly designed for the main cable construction frame, and emergency braking is performed by abutting against the cable clamp on the main cable. First, the inner side of the arc-shaped frame is held to generate a friction force to perform primary braking. When braking cannot be achieved, the slide plate set is in contact with the cable clamp. In order to prevent sudden collision from causing emergency braking, the plurality of slide plates are gradually compressed to gradually brake, so that the braking force gradually increases in the buffering process, the braking and buffering effects are good, and the construction safety of the main cable construction frame is further improved.

[0013] Preferably, in the above emergency braking device for the main cable construction frame, the lengths of the springs corresponding to the lengths of the slide plates are directly proportional to the lengths of the slide plates. By setting the springs with different lengths, the step-by-step compression of the slide plates has sufficient compression space, and the step-by-step compression can be ensured to be effective.

[0014] Preferably, in the above emergency braking device for the main cable construction frame, an oil cylinder is installed in the arc-shaped frame, the two ends of the oil cylinder are open, and a piston rod is slidably connected with each end of the oil cylinder, one end of each of the two piston rods away from the oil cylinder is fixedly connected with the end of the shortest slide plate, and the oil cylinder is filled with hydraulic oil. In order to further improve the braking effect, the oil cylinder auxiliary structure is added to assist the compression of the oil cylinder at the last stage of compression, the braking effect is strengthened, and the spring elastic force cannot meet the braking buffering.

[0015] Preferably, in the above emergency braking device for the main cable construction frame, the slide plates are slidably connected through the cooperation of the sliding grooves and the sliding rails. The slide plates are connected in a mutually cooperative and restrictive manner to prevent the slide plates from falling out.

[0016] Preferably, in the above-mentioned emergency braking device for the main cable construction frame, the depth of the sliding cavity can meet the compression and alignment of the plurality of sliding plates away from one end of the arc-shaped frame. The movement of the sliding plate provides sufficient space.

[0017] A construction frame support system comprises a construction frame body hoisted on a main cable; further comprises the above-mentioned emergency braking device for the main cable construction frame; the number of the emergency braking device is two sets and is arranged on both sides of the main cable; the fixed end of the hydraulic cylinder is fixedly connected with the inner side of the construction frame body; and the recessed surface of the arc-shaped frame faces the main cable.

[0018] Through the above technical scheme, the emergency braking device provided by the application can clamp the main cable under the driving of the hydraulic cylinder and gradually buffer brake through the multi-stage sliding plate, so that the construction frame body can quickly and stably brake when stalling, and the safety performance is stronger.

[0019] Preferably, in the above-mentioned construction frame support system, a plurality of V-shaped articulated support frames are connected between the inner side of the construction frame body and the convex surface of the arc-shaped frame. The V-shaped articulated support frame can enhance the connection stability between the hydraulic cylinder and the arc-shaped frame when the hydraulic cylinder acts.

[0020] Preferably, in the above-mentioned construction frame support system, a speed sensor is installed on the construction frame body, the data output end of the speed sensor is connected with the signal input end of a PLC control system, and the signal output end of the PLC control system is electrically connected with the control end of the hydraulic cylinder. The speed sensor is arranged to detect the stalling state, and the hydraulic cylinder is driven accordingly, so that the automatic control effect is stronger and the intelligent degree is higher.

[0021] Through the above technical scheme, compared with the prior art, the application discloses an emergency braking device for a main cable construction frame and a construction frame support system, which has the following beneficial effects:

[0022] 1、The emergency braking device provided by the application is mainly designed for the main cable construction frame, and performs emergency braking by abutting against the cable clamp on the main cable. Firstly, the inner side of the arc-shaped frame generates a friction force to perform primary braking. When the braking cannot be achieved, the sliding plate group contacts the cable clamp. In order to prevent sudden collision from causing emergency braking, the multi-stage sliding plate gradually compresses the spring to gradually brake, so that the braking force gradually increases in the buffering process, has a good braking buffering effect, and further improves the construction safety of the main cable construction frame.

[0023] 2、The emergency brake device provided by the application can clamp the main cable under the drive of the hydraulic cylinder after being connected with the construction frame body, and gradually buffer brake by means of the multi-stage sliding plates, so that the construction frame body can be quickly and stably braked when losing speed, and the safety performance is stronger.

[0024] 3、The application further improves the braking effect by adding the oil cylinder auxiliary structure, which assists the compression of the oil cylinder at the last stage of compression, strengthens the braking effect, and prevents the spring elasticity from failing to meet the braking buffer.

[0025] 4、The application detects the losing speed state by the speed sensor, and drives the hydraulic cylinder accordingly, so that the automatic control effect is stronger, and the intelligent degree is higher. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute the embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0027] Figure 1 The drawing is a structural schematic view of the emergency brake device for the main cable construction frame provided by the application;

[0028] Figure 2 The drawing is a structural schematic view of the other side of the emergency brake device for the main cable construction frame provided by the application;

[0029] Figure 3 The drawing is a plan view of the inside of the emergency brake device for the main cable construction frame provided by the application;

[0030] Figure 4 The drawing is a sectional view of the emergency brake device for the main cable construction frame provided by the application;

[0031] Figure 5 The drawing is a structural schematic view of the construction frame support system provided by the application;

[0032] Figure 6 The drawing is a front view of the construction frame support system provided by the application;

[0033] Figure 7 The drawing is a schematic view of the first support wheel in the emergency brake device provided by the application;

[0034] Figure 8 The drawing is a principle diagram of the first buffer state of the emergency brake device provided by the application after encountering an obstacle;

[0035] Figure 9The drawing is a principle diagram of the second buffer state of the emergency braking device of the application after encountering an obstacle.

[0036] Figure 10 The drawing is a principle diagram of the third buffer state of the emergency braking device of the application after encountering an obstacle.

[0037] Wherein:

[0038] 1-hydraulic cylinder;

[0039] 2-arc-shaped frame;

[0040] 21-sliding cavity; 22-first supporting wheel; 23-oil cylinder; 24-shear pin;

[0041] 3-sliding plate group;

[0042] 31-sliding plate; 32-spring; 33-second supporting wheel; 34-piston rod;

[0043] 4-construction frame body;

[0044] 5-V-shaped hinged supporting frame. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application. Embodiment 1

[0046] Referring to the drawings of the embodiments of the application, Figure 5 to the drawings of the embodiments of the application, Figure 6 The embodiments of the application disclose a construction frame supporting system, which comprises a construction frame body 4 hoisted on a main cable; further comprises an emergency braking device for the main cable construction frame;

[0047] Referring to the drawings of the embodiments of the application, Figure 1 to the drawings of the embodiments of the application, Figure 4 The emergency braking device for the main cable construction frame comprises:

[0048] 1-hydraulic cylinder;

[0049] 2-arc-shaped frame, the outer convex surface of the arc-shaped frame 2 is fixedly connected with the telescopic end head of the hydraulic cylinder 1, and the two end surfaces of the arc-shaped frame 2 have sliding cavities 21;

[0050] The slide plate group 3 is in sliding connection with the two slide cavities 21, and comprises a plurality of slide plates 31 which are stacked and in sliding connection with each other, the lengths of the plurality of slide plates 31 increase from top to bottom, the plurality of slide plates 31 are aligned at one end and in sliding connection with the slide cavities 21, a plurality of springs 32 corresponding to the ends of the plurality of slide plates 31 are arranged in the slide cavities 21, and the lengths of the plurality of slide plates 31 at the other end are different, and the length of the slide plate 31 facing the concave surface of the arc-shaped frame 2 is the longest.

[0051] The emergency brake device is arranged on both sides of the main cable, the fixed end of the hydraulic cylinder 1 is fixedly connected to the inner side of the construction frame body 4, and the concave surface of the arc-shaped frame 2 faces the main cable.

[0052] In order to further optimize the above technical solution, the lengths of the springs 32 are in direct proportion to the lengths of the slide plates 31.

[0053] In order to further optimize the above technical solution, the slide plates 31 are in sliding connection through the sliding grooves and sliding rails. In this embodiment, the slide plates 31 are in sliding connection through the sliding grooves and sliding rails between the slide plates 31 and the sidewalls of the slide cavities 21, in order to ensure the stability of the slide plates 31 and prevent the slide plates 31 from being pulled out.

[0054] In order to further optimize the above technical solution, the depth of the slide cavities 21 can satisfy the compression and alignment of the plurality of slide plates 31 away from the arc-shaped frame 2.

[0055] In order to further optimize the above technical solution, a plurality of V-shaped hinged support frames 5 are arranged between the inner side of the construction frame body 4 and the convex surface of the arc-shaped frame 2.

[0056] In order to further optimize the above technical solution, a speed sensor is arranged on the construction frame body 4, a data output end of the speed sensor is connected to a signal input end of a PLC control system, and a signal output end of the PLC control system is electrically connected to a control end of the hydraulic cylinder 1.

[0057] The braking principle of the emergency brake device in the construction frame support system provided in this embodiment is described with reference to FIG. 2. Figure 8 to FIG. 2 Figure 10 :

[0058] In this embodiment, the number of the slide plates 31 is three.

[0059] Firstly, when the speed sensor detects that the speed increases rapidly, that is, in the stall state, the PLC control system controls the hydraulic cylinder 1 to act, and the two hydraulic cylinders 1 drive the arc-shaped frame 2 to clamp the main cable, so as to form a friction braking force and brake the construction frame.

[0060] When the friction braking force of the arc frame 2 is insufficient to fully brake the structure, the construction frame continues to stall until it reaches the cable clamp, as shown in the attached... Figure 8 As shown, the longest skateboard 31 first contacts the cable clamp and is compressed until the longest skateboard 31 is compressed to be flush with the middle skateboard 31, thus completing the first stage of buffering.

[0061] If the construction frame has been braked to a stop at this point, braking is complete. If braking has not stopped, the longest slide plate 31 and the middle slide plate 31 continue to compress until they are flush with the shortest slide plate, completing the second stage of buffering. Figure 9 As shown.

[0062] If the construction frame has been braked to a stop at this point, braking is complete. If braking has not stopped, the three slide plates 31 continue to compress simultaneously until they reach their compression limits, thus completing braking. Figure 10 As shown.

[0063] Once braking is complete, the slide plate 31 can automatically return to its original position under the action of the spring 32. Example 2

[0064] See appendix Figure 1 Appendix Figure 3 Appendix Figure 4 and attached Figure 7 To further improve the braking effect and prevent hard impacts, this embodiment is further improved based on embodiment 1:

[0065] The concave surface of the arc frame 2 is equipped with a first support wheel 22, and the concave surface of the longest slide plate 31, away from the arc frame 2, is equipped with a second support wheel 33.

[0066] In this embodiment, both the first support wheel 22 and the second support wheel 33 are made of hard rubber.

[0067] To ensure the friction braking effect of the arc frame 2, the shaft of the first support wheel 22 is locked by a shear pin 24, preventing it from rotating. When the arc frame 2 approaches the main cable for friction braking, the first support wheel 22 performs friction braking and does not rotate. At this time, there are two possibilities:

[0068] One scenario is that the frictional force cannot overcome the shearing limit of the shear pin 24, while the other is that the frictional force overcomes the shearing limit of the shear pin 24 and is sheared, after which the first support wheel 22 rotates. This structure is designed to prevent the brake from being unable to brake and the frictional force from being too large, causing the brake to be under strong frictional force and damaging the device. It is a self-protection mechanism. Example 3

[0069] This embodiment is a further optimization based on Embodiment 1 or Embodiment 2:

[0070] The arc-shaped frame 2 is internally provided with an oil cylinder 23, the two ends of the oil cylinder 23 are provided with openings, and the openings are slidably connected with piston rods 34, the two ends of the piston rods 34 away from the oil cylinder 23 are respectively fixedly connected with the end heads of the shortest slide plates 31; the oil cylinder 23 is filled with hydraulic oil.

[0071] In order to further improve the braking effect, an oil cylinder auxiliary structure is added, and the auxiliary oil cylinder is compressed at the same time during the last stage of compression, so that the braking effect is strengthened, and the spring elastic force cannot meet the braking buffering.

[0072] The oil in the oil cylinder 23 is compressed during braking, and can be reset under the action of the spring 32 when reset is needed.

[0073] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0074] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An emergency braking device for a main cable construction tower, characterized in that, Include: Hydraulic cylinder (1); Arc-shaped frame (2), the outer convex surface of the arc-shaped frame (2) is fixedly connected with the telescopic end of the hydraulic cylinder (1), and the two end surfaces of the arc-shaped frame (2) have sliding cavities (21); The number of the slide plate group (3) is two sets, and each is slidably connected with two sliding cavities (21); the slide plate group (3) includes a plurality of slide plates (31) that are mutually superimposed and slidably connected with each other, the lengths of the plurality of slide plates (31) gradually increase from top to bottom, one end of the plurality of slide plates (31) is aligned and slidably connected with the sliding cavity (21), a plurality of spring groups (32) corresponding to the ends of the plurality of slide plates (31) are installed in the sliding cavity (21), the lengths of the other ends of the plurality of slide plates (31) are different, and the length of the slide plate (31) facing the concave surface of the arc-shaped frame (2) is the longest; The concave surface of the arc-shaped frame (2) is provided with a first supporting wheel (22), and the end of the longest slide plate (31) away from the arc-shaped frame (2) is provided with a second supporting wheel (33); An oil cylinder (23) is installed in the arc-shaped frame (2), the openings at both ends of the oil cylinder (23) are slidably connected with piston rods (34), and the ends of the two piston rods (34) away from the oil cylinder (23) are fixedly connected with the ends of the shortest slide plates (31); the oil cylinder (23) is filled with hydraulic oil.

2. An emergency braking device for a main cable construction scaffold according to claim 1, characterized in that The lengths of the springs (32) corresponding to the lengths of the slide plates (31) are directly proportional to the lengths of the slide plates (31).

3. The emergency braking device for the main cable construction scaffold according to claim 1, characterized in that, The number of the slide plates (31) is three.

4. The emergency braking device for the main cable construction scaffold according to claim 1, characterized in that, The slide plates (31) are slidably connected through the cooperation of the sliding grooves and sliding rails.

5. The emergency braking device for a main cable construction scaffold according to claim 1, characterized in that, The depth of the sliding cavity (21) can satisfy the compression and alignment of the plurality of slide plates (31) away from the arc-shaped frame (2).

6. A scaffold support system comprising a scaffold body (4) hoisted on a main cable; characterized in that, Further comprising the emergency braking device for the main cable construction frame according to any one of claims 1-5; the number of the emergency braking device is two sets, and the emergency braking device is arranged on both sides of the main cable; the fixed end of the hydraulic cylinder (1) is fixedly connected with the inner side of the construction frame body (4), and the concave surface of the arc-shaped frame (2) faces the main cable.

7. A scaffold support system according to claim 6, wherein A plurality of V-shaped hinged support frames (5) are connected between the inner side of the construction frame body (4) and the convex surface of the arc-shaped frame (2).

8. A scaffold support system according to claim 6, wherein, A speed sensor is installed on the construction frame body (4), the data output end of the speed sensor is connected with the signal input end of a PLC control system, and the signal output end of the PLC control system is electrically connected with the control end of the hydraulic cylinder (1).

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