Crown block cab convenient for escape

Abstract

The crown block cab convenient to escape comprises a cabin, an escape door is arranged on a bottom plate of the cabin, and an auxiliary landing mechanism is arranged on the inner wall of the cabin. The auxiliary descending mechanism is composed of a retracting and releasing assembly, a slow descending assembly and a variable-speed motor, the retracting and releasing assembly is composed of a winding drum and an escape rope arranged around the winding drum, the output end of a winding drum shaft is connected with the input end of the variable-speed motor, the output end of the variable-speed motor is connected with the slow descending assembly, and the slow descending assembly controls the speed of the winding drum when the winding drum rotates; a safety belt matched with an operator is arranged at the tail end of the escape rope. The safety device is mainly used for the situation that a special vestibule or an externally-hung walking ladder cannot pass through in dangerous cases such as fire disasters, and a crown block driver emergently returns to the ground for use, and has the advantages of being high in safety and practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of overhead cranes, in particular to an overhead crane driving cabin which is convenient for escaping. Background Art

[0002] Overhead cranes can make full use of the space under the bridge to lift materials without being hindered by ground equipment. They are the most widely used and most numerous type of lifting machinery, and are widely used in indoor and outdoor warehouses, factories, docks, and storage yards. When overhead cranes operate in steel mills, warehouses, and other places, there are many sources of danger, which may be molten iron or flammable and explosive materials. The driving cabin of the overhead crane is generally located at a very high position, and it travels back and forth to the ground through a dedicated corridor or an external hanging ladder. When a fire, molten iron outflow, or other accidents occur at the work site, the danger often comes instantly, and it is likely to affect the dedicated corridor or the external hanging ladder, making it impossible for the overhead crane driver to return to the ground in time, posing a great threat to the life safety of the operator.

[0003] The cab disclosed in the Chinese patent with application number CN202021005134.X and titled “Anti-fall suction and unloading overhead crane cab” includes a guide rail and a cab. The top of the traveling mechanism is slidably connected to the guide rail. An anti-fall device is fixedly connected to the top of the cab between the two traveling mechanisms. The anti-fall device includes two spaced positioning seats. This patent sets two sets of anti-fall devices. When the cab falls, the lower connecting rod and the upper connecting rod both shrink inward, so that the traveling wheels press the guide rail, thereby preventing the cab from falling. However, it does not involve the problems mentioned in this application. Utility Model Content

[0004] The utility model aims to overcome the defects of the prior art and to provide an overhead crane cockpit which is convenient for escape, so as to solve the problems mentioned in the background art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A crane cabin for facilitating escape comprises a cabin, wherein an escape door is arranged on the cabin floor, and an auxiliary landing mechanism is arranged on the cabin inner wall; the auxiliary landing mechanism consists of a retractable assembly, a slow-descent assembly, and a speed changer; the retractable assembly consists of a drum and an escape rope arranged around the drum, the drum shaft output is connected to the speed changer input end, the speed changer output end is connected to the slow-descent assembly, and the slow-descent assembly controls the speed of the drum when it rotates; a safety belt matching the operator is arranged at the end of the escape rope.

[0007] The above-mentioned overhead crane cockpit that facilitates escape, the slow-descent assembly is composed of a box body and a tightening assembly, a first friction disc, and a second friction disc arranged therein;

[0008] The tightening assembly is composed of a rotating shaft and a connecting rod, a connecting rod seat and a return spring arranged thereon; both ends of the rotating shaft are installed on the box body, the connecting rod seat is installed on the rotating shaft, one end of the connecting rod is hinged on the connecting rod seat, and the other end is provided with a heavy hammer, one end of the return spring is connected to the middle part of the connecting rod, and the other end is connected to the rotating shaft, a push rod is arranged on the heavy hammer, and a universal ball is arranged at one end of the push rod;

[0009] The first friction disc is installed on the rotating shaft through a spline and can slide along the axial direction of the rotating shaft. The first friction disc is provided with an annular rolling groove matching the universal ball on the push rod; the first friction disc and the second friction disc are provided with friction plates matching each other.

[0010] The above-mentioned overhead crane cockpit that is easy to escape is provided with a fireproof bag under the escape door. The fireproof bag is a flexible structure with openings at both ends and flexible materials arranged on the sides. One end of the fireproof bag is connected to the escape port at the escape door, and the other end is open for personnel escape. It is usually folded and stored under the bottom plate of the cabin. When a fire occurs, the fireproof bag is released and quickly released to form an isolation layer from the fire.

[0011] In the above-mentioned overhead crane cockpit that facilitates escape, the safety belt is a full-body wearable safety belt. Beneficial Effects

[0012] Compared with the prior art, the utility model has the following advantages: first, an escape door is arranged on the bottom plate of the cabin, and an auxiliary landing mechanism is arranged on the inner wall of the cabin. When encountering a dangerous situation, the operator can wear a safety belt and quickly escape from the escape door. Second, when the operator escapes, the drum rotates rapidly under the pull of the escape rope, and the speed is increased by the speed changer. The rotating shaft drives the tightening assembly to rotate at a high speed. The weight is thrown away from the circumferential direction of the rotating shaft under the action of centrifugal force. The upper push rod pushes the first friction disk to approach the second friction disk through the universal ball. The two are squeezed and rubbed against each other, and the friction force is used to form a brake. Third, when the second friction disk brakes and slows down the first friction disk, the first friction disk acts on the rotating shaft through the spline, and the two brake and slow down at the same time. As the speed gradually decreases, the centrifugal force of the weight decreases, and the top pressure of the push rod on the first friction disk decreases, thereby reducing the braking force. Under the pulling action of the escape rope, the speed begins to increase again. This method of controlling the centrifugal force of the weight and the friction force of the friction disk by the speed can achieve the purpose of nearly uniform descent. Fourth, a universal ball is provided on the push rod in the tightening assembly. During the process of clamping and braking between the first friction disc and the second friction disc, the universal ball rotates freely and only plays the role of clamping the first friction disc, which can prevent the first friction disc from transmitting the circumferential braking friction force to the tightening assembly, thereby affecting the working performance of the tightening assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a partial structural schematic diagram of the utility model;

[0016] The symbols in the figure represent:

[0017] 1. Cabin, 2. Escape door, 3. Auxiliary landing mechanism, 4. Retractable assembly, 5. Slow descent assembly, 6. Speed ​​​​changer, 7. Fireproof bag, 401. Escape rope, 402. Safety belt, 501. Rotating shaft, 502. Connecting rod, 503. Connecting rod seat, 504. Return spring, 505. First friction disk, 5051. Annular rolling groove, 506. Heavy hammer, 507. Push rod, 508. Second friction disk. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] See also Figure 1 to Figure 2 The utility model includes: a cabin 1, an escape door 2 is arranged on the bottom plate of the cabin 1, and an auxiliary landing mechanism 3 is arranged on the inner wall of the cabin 1; the auxiliary landing mechanism 3 is composed of a retractable assembly 4, a slow-down assembly 5, and a speed changer 6, the retractable assembly 4 is composed of a drum and an escape rope 401 arranged around the drum, the drum shaft output is connected to the input end of the speed changer 6, the output end of the speed changer 6 is connected to the slow-down assembly 5, and the slow-down assembly 5 controls the speed of the drum when it rotates; a safety belt 402 matching the operator is arranged at the end of the escape rope 401. In case of danger, the operator wears the safety belt 402 and can escape quickly from the escape door. The safety belt 402 is a full-body wearable safety belt, or a simple safety belt.

[0020] In the case of a small cabin height, the falling speed of the operator may not reach the speed required by the slow-down assembly 5, so a speed changer 6 needs to be provided between the slow-down assembly 5 and the drum to change the speed. The speed changer 6 can be realized by meshing a set of spur gears or a set of helical gears, and using the gear set transmission ratio to achieve the change of speed; or the transmission ratio can be continuously and progressively changed by multiple sets of spur gears to continuously increase the speed. The above are all prior art.

[0021] The design of the descent control assembly 5 may adopt the following scheme: the descent control assembly 5 is composed of a box body, a tightening assembly arranged therein, a first friction disc 505 , and a second friction disc 508 .

[0022] The tightening assembly consists of a rotating shaft 501 and a connecting rod 502, a connecting rod seat 503, and a return spring 504 arranged thereon; both ends of the rotating shaft 501 are installed on the box body, the connecting rod seat 503 is installed on the rotating shaft 501, one end of the connecting rod 502 is hinged on the connecting rod seat 503, and the other end is provided with a weight 506, one end of the return spring 504 is connected to the middle part of the connecting rod 502, and the other end is connected to the rotating shaft 501, a push rod 507 is arranged on the weight 506, and a universal ball is arranged at one end of the push rod 507.

[0023] The first friction disc 505 is mounted on the rotating shaft 501 through a spline and can slide along the axial direction of the rotating shaft 501. The specific structure is that the mounting hole at the center of the first friction disc 505 is provided with an internal spline, and the rotating shaft 501 is provided with an external spline matching the internal spline. After the first friction disc 505 is mounted on the rotating shaft 501 through the matching of the internal spline and the external spline, it can slide left and right along the axial direction of the rotating shaft 501.

[0024] The second friction disc (508) is fixed in the box body, and the first friction disc 505 and the second friction disc 508 are provided with friction plates that match each other.

[0025] The function of the universal ball on the push rod 507 is to prevent the circumferential braking friction force from being transmitted to the tightening assembly during the braking process of the second friction disc 508 on the first friction disc 505, thereby affecting the working performance of the tightening assembly. The first friction disc 505 is provided with an annular rolling groove 5051 that matches the universal ball on the push rod 507. When the operator escapes, the drum rotates rapidly under the pull of the escape rope 401, and the speed is increased through the speed changer. The shaft 501 drives the tightening assembly to rotate at a high speed, and the weight 506 is thrown away from the shaft 501 in the circumferential direction under the action of centrifugal force. The push rod 507 on it presses the first friction disc 505 through the universal ball, pushing the first friction disc 505 to approach the second friction disc 508. Since the second friction disc 508 is fixed, the two squeeze and rub against each other, and the friction between the first friction disc 505 and the second friction disc 508 is used to form a brake. During this braking process, the second friction disc 508 is connected to the housing, and when it brakes the first friction disc 505, the first friction disc 505 is braked and decelerated simultaneously with the rotating shaft 501 through the spline. As the speed gradually decreases, the centrifugal force of the weight 506 decreases, and the pressing force of the push rod 507 on the first friction disc 505 decreases, thereby reducing the braking force. Under the action of the escape rope, the speed begins to increase again. This method of controlling the centrifugal force of the weight 506 and the friction force of the friction disc by the speed can achieve the purpose of nearly uniform descent.

[0026] The output shaft of the reel and the shaft of the speed changer 6 , as well as the shaft of the speed changer 6 and the rotating shaft 501 of the descending control assembly 5 , are connected via a coupling.

[0027] When a fire occurs or molten iron overflows, in order to ensure the safety of the workers during the descent, the following solution can be adopted: a fireproof bag 7 is arranged under the escape door 2, and the fireproof bag 7 is a flexible structure with openings at both ends and flexible materials arranged on the sides. One end of the fireproof bag 7 is connected to the escape port at the escape door 2, and the other end is open for personnel escape. It is usually folded and stored under the bottom plate of the cabin 1. When a fire occurs, the fireproof bag 7 is released and quickly released to form an isolation layer from the fire.

Claims

1. A crane cabin for facilitating escape, comprising a cabin (1), characterized in that: An escape door (2) is arranged on the bottom plate of the cabin (1), and an auxiliary landing mechanism (3) is arranged on the inner wall of the cabin (1); the auxiliary landing mechanism (3) is composed of a retractable assembly (4), a slow-descent assembly (5), and a speed changer (6); the retractable assembly (4) is composed of a drum and an escape rope (401) arranged around the drum; the drum shaft output is connected to the input end of the speed changer (6); the output end of the speed changer (6) is connected to the slow-descent assembly (5); the slow-descent assembly (5) controls the speed of the drum when it rotates; and a safety belt (402) matching the operator is arranged at the end of the escape rope (401).

2. The overhead crane cockpit for facilitating escape according to claim 1, characterized in that: The slow-down assembly (5) is composed of a box body and a tightening assembly, a first friction disc (505), and a second friction disc (508) arranged therein; the tightening assembly is composed of a rotating shaft (501) and a connecting rod (502), a connecting rod seat (503), and a return spring (504) arranged thereon; both ends of the rotating shaft (501) are mounted on the box body, the connecting rod seat (503) is mounted on the rotating shaft (501), one end of the connecting rod (502) is hinged on the connecting rod seat (503), and the other end is provided with a weight (506); one end of the return spring (504) is connected to the connecting rod (502) The middle part and the other end are connected to the rotating shaft (501); a push rod (507) is arranged on the weight (506); a universal ball is arranged at one end of the push rod (507); a first friction disc (505) is mounted on the rotating shaft (501) through a spline and can slide along the axial direction of the rotating shaft (501); an annular rolling groove (5051) matching with the universal ball on the push rod (507) is arranged on the first friction disc (505); and a second friction disc (508) is fixed in the box body; friction plates matching each other are arranged on the first friction disc (505) and the second friction disc (508).

3. The overhead crane cockpit for facilitating escape according to claim 1, characterized in that: A fireproof bag (7) is arranged below the escape door (2). The fireproof bag (7) is a flexible structure with openings at both ends and flexible materials arranged on the sides. One end of the fireproof bag (7) is connected to the escape opening at the escape door (2), and the other end is open for personnel to escape. The fireproof bag (7) is usually folded and stored below the bottom plate of the cabin (1). When a fire occurs, the fireproof bag is released and quickly released to form an isolation layer from the fire.

4. The overhead crane cockpit for facilitating escape according to claim 1, characterized in that: The safety belt (402) is a full-body wearable safety belt.

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