Monorail crane stall alarming and car catching protection device

Abstract

The invention relates to the technical field of mine transportation safety, and particularly discloses a monorail crane stall alarm car catching protection device which comprises a rail body. The rail clamping mechanism is installed on one side of the top end of the rail body, the two buffering mechanisms are installed on the outer wall of the rail clamping mechanism, the intercepting mechanism is installed at the top end of the rail clamping mechanism, the supporting frame is installed on the other side of the top end of the rail body, and the fixing frame is installed at the other end of the supporting frame. The two sides of the outer surface of the fixing frame are each provided with an adsorption frame. When the intercepting frame falls on the rail body, the trigger makes contact with the rail body and controls the air cylinder to be started, the air cylinder extends to push the rail holding frames to move towards the middle, the rail body is held by the two rail holding frames together, the rail body is clamped through friction force, and then overspeed vehicles are intercepted; and disastrous accidents such as derailment and collision caused by overspeed driving of the vehicle are avoided, and the safety is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of mine transportation safety, and particularly relates to a stall alarm and car-catching protection device for a single-track crane. Background Art

[0002] A single-track crane is a transportation system that uses a single special I-beam as a track and runs along the track by hanging a vehicle group. It is widely used in places such as coal mines, tunnels, and large warehouses for material handling and installation work. The single-track crane has the characteristics of strong mobility, fast running speed, large load capacity, safety and reliability, etc. It can run on the suspended single track to realize vertical or horizontal transportation of materials. In underground coal mines, especially in the up and down slopes of mining areas and the flat roads of working faces, single-track cranes are often used to transport materials, equipment, and personnel. In addition, single-track cranes are also widely used in places such as tunnels and large warehouses.

[0003] In a complex and changeable roadway environment, in the transportation operation of the existing single-track crane, the problem of vehicle overspeed has become a major hidden danger restricting its safety and reliability. If the vehicle speed cannot be effectively controlled, overspeed is extremely likely to cause catastrophic accidents such as derailment and collision. Summary of the Invention

[0004] The purpose of the present invention is to provide a stall alarm and car-catching protection device for a single-track crane, which can monitor the vehicle speed in real time and trigger rail clamping braking when overspeed occurs to solve the derailment problem caused by overspeed.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A stall alarm and car-catching protection device for a single-track crane, comprising:

[0007] A track body;

[0008] A rail clamping mechanism is installed on one side of the top of the track body. Two buffer mechanisms are installed on the outer wall of the rail clamping mechanism. An interception mechanism is installed on the top of the rail clamping mechanism. A support frame is installed on the other side of the top of the track body. The other end of the support frame is installed with a fixing frame. Adsorption frames are installed on both sides of the outer surface of the fixing frame;

[0009] The rail clamping mechanism includes an interception frame, a limiting rod, a cylinder, a rail clamping frame, a ball, a trigger, and an adsorption rod. The interception frame is placed on the top of the track body. There are two limiting rods, two cylinders, two rail clamping frames, and two adsorption rods. The two limiting rods are installed between the inner walls on both sides of the interception frame. The two cylinders are respectively installed at both ends of the interception frame. The two rail clamping frames are respectively installed at the output ends of the two cylinders. There are multiple balls, and the multiple balls are respectively embedded in the opposite surfaces of the two rail clamping frames. The trigger is embedded in the middle of the bottom end of the interception frame. The two adsorption rods are installed on the top of the interception frame.

[0010] Preferably, an electric control box and a gas control box are installed in the middle of the top of the fixed frame, and the opposite surfaces of the electric control box and the gas control box are installed together, and sound and light alarms are installed on the top of the electric control box and the gas control box. A radar speed sensor is installed on the upper part of one end of the support frame, and a position sensor is installed on the upper part of the other end of the support frame.

[0011] Preferably, the intercepting frame is configured as a Japanese-shaped structure, the cylinder is electrically connected to the air control box, the rail holding frame and the support frame are both configured as L-shaped structures, the trigger, sound and light alarm, radar speed sensor and position sensor are all electrically connected to the electrical control box, and the material of the adsorption rod is set to iron.

[0012] Preferably, the adsorption frame includes a fixing plate, a fixing bolt, a fixing nut, a pad and an electromagnetic plate. Two fixing plates are provided, and four fixing bolts and four fixing nuts are provided. The four fixing bolts are respectively installed on the four corners of the opposite surfaces of the two fixing plates, and the four fixing nuts are respectively installed on the upper outer surfaces of the four fixing bolts. The pad is placed on the top of the lower fixing plate, and the electromagnetic plate is installed on the bottom end of the lower fixing plate.

[0013] Preferably, the electromagnetic plate is electrically connected to the electric control box, and the two adsorption racks are respectively located directly above the two adsorption rods.

[0014] Preferably, the buffer mechanism includes a buffer box, a reinforcement strip, a buffer frame, a buffer plate and a large buffer spring. The buffer box is installed on the outer wall of the intercepting frame. Two reinforcement strips are provided, and the two reinforcement strips are installed on one side of the outer wall of the buffer box. The buffer frame is installed on the other side of the outer wall of the buffer box. The buffer plate is installed on the other end of the buffer frame. There are multiple large buffer springs, and the multiple large buffer springs are installed on the inner wall of the buffer frame.

[0015] Preferably, shock absorbers are installed on both sides of the inner wall of the buffer box, and the other ends of the two shock absorbers are installed on one end of the buffer frame, magnetic blocks are installed in the middle of the inner wall of the buffer box and the middle of one end of the buffer frame, and multiple small buffer springs are installed on the upper and lower parts of the inner wall of the buffer box.

[0016] Preferably, the magnetic poles of the two magnetic blocks are the same, the buffer frame and the track body are both configured as I-shaped structures, and the outer wall of the buffer plate is configured as an arc structure.

[0017] Preferably, the interception mechanism includes a damping brake box, a guide wheel set, a steel wire rope, a fixing ring and a fixing block. The damping brake box is installed in the middle of the bottom end of the fixing frame. The guide wheel set is installed on the outer wall of the damping brake box. The steel wire rope is arranged inside the damping brake box. The fixing ring is installed at the other end of the steel wire rope. The fixing block is installed at the bottom end of the fixing ring.

[0018] Preferably, the damping brake box is electrically connected to the electric control box. The bottom end of the fixing block is welded and installed together with the top end of the interception frame.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) The present invention is provided with a rail clamping mechanism at the top end of the rail body. When the interception frame falls on the rail body, the trigger contacts the rail body and controls the cylinder to start. The cylinder extends and pushes the rail clamping frame to move towards the middle, so that the two rail clamping frames together hold the rail body, and the rail body is clamped by friction, thereby realizing the interception of the overspeed vehicle and avoiding catastrophic accidents such as derailment and collision caused by the overspeed driving of the vehicle, improving safety.

[0021] (2) The present invention is provided with a buffer mechanism on the outer surface of the rail clamping mechanism. During the process of the rail clamping mechanism intercepting the overspeed vehicle, the vehicle first contacts the buffer plate for preliminary buffering. Then, the large buffer spring and the small buffer spring, through their elastic actions, perform secondary buffering on the impact force, and through the damping of the shock absorber and the repulsive force between the magnetic blocks, perform final buffering on the impact force, which can strengthen the buffering effect and thus extend the service life of the rail clamping mechanism.

[0022] (3) The present invention is provided with an interception mechanism at the bottom end of the fixing frame. When the overspeed vehicle pushes the rail clamping mechanism to move on the rail body, the steel wire rope can be tightened through the damping brake box during the forward movement of the rail clamping mechanism, that is, the vehicle can be intercepted by the friction between the damping brake box and the steel wire rope, providing a stable interception effect. Description of the Drawings

[0023] Figure 1 is one of the three-dimensional views of the present invention;

[0024] Figure 2 is the second three-dimensional view of the present invention;

[0025] Figure 3 is the three-dimensional view of the rail clamping mechanism of the present invention;

[0026] Figure 4 is the three-dimensional view of the rail clamping frame of the present invention;

[0027] Figure 5 is the three-dimensional view of the adsorption frame of the present invention;

[0028] Figure 6 Isometric view of the buffer mechanism of the present invention;

[0029] Figure 7 Cross-sectional view of the buffer box of the present invention;

[0030] Figure 8 Isometric view of the interception mechanism of the present invention;

[0031] In the figure: 1, track body; 2, rail clamping mechanism; 3, buffer mechanism; 4, interception mechanism; 5, support frame; 6, fixing frame; 7, adsorption frame; 8, electric control box; 9, pneumatic control box; 10, audible and visual alarm; 11, radar speed sensor; 12, position sensor;

[0032] 21, interception frame; 22, limit rod; 23, cylinder; 24, rail clamping frame; 25, ball; 26, trigger; 27, adsorption rod;

[0033] 31, buffer box; 32, reinforcement bar; 33, buffer frame; 34, buffer plate; 35, large buffer spring; 36, shock absorber; 37, magnet; 38, small buffer spring;

[0034] 41, damping brake box; 42, guide wheel set; 43, steel wire rope; 44, fixing ring; 45, fixing block;

[0035] 71, fixing plate; 72, fixing bolt; 73, fixing nut; 74, cushion block; 75, electromagnetic plate. Specific embodiments

[0036] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1:

[0038] Please refer to Figures 1 to 8 As shown in the figure, the single-track crane stall alarm and vehicle-catching protection device includes:

[0039] Track body 1;

[0040] On one side of the top of the track body 1, a rail clamping mechanism 2 is installed. On the outer wall of the rail clamping mechanism 2, two buffer mechanisms 3 are installed. On the top of the rail clamping mechanism 2, an interception mechanism 4 is installed. On the other side of the top of the track body 1, a support frame 5 is installed. At the other end of the support frame 5, a fixing frame 6 is installed. On both sides of the outer surface of the fixing frame 6, adsorption frames 7 are installed;

[0041] The rail clamping mechanism 2 includes an interception frame 21, a limiting rod 22, a cylinder 23, a rail clamping frame 24, a ball 25, a trigger 26 and an adsorption rod 27. The interception frame 21 is placed on the top of the rail body 1. There are two limiting rods 22, two cylinders 23, two rail clamping frames 24 and two adsorption rods 27. The two limiting rods 22 are both installed between the inner walls on both sides of the interception frame 21. The two cylinders 23 are respectively installed at both ends of the interception frame 21. The two rail clamping frames 24 are respectively installed at the output ends of the two cylinders 23. There are multiple balls 25, and the multiple balls 25 are respectively installed in an embedded manner on the opposite surfaces of the two rail clamping frames 24. The trigger 26 is installed in the middle of the bottom end of the interception frame 21 in an embedded manner. The two adsorption rods 27 are both installed at the top of the interception frame 21.

[0042] It can be seen from Figures 1 to 5 that an electric control box 8 and a pneumatic control box 9 are installed in the middle of the top end of the fixing frame 6, and the opposite surfaces of the electric control box 8 and the pneumatic control box 9 are installed together. An audible and visual alarm 10 is installed on the top of the electric control box 8 and the pneumatic control box 9 together. A radar speed sensor 11 is installed on the upper part of one end of the support frame 5, and a position sensor 12 is installed on the upper part of the other end of the support frame 5;

[0043] The adsorption frame 7 includes a fixing plate 71, fixing bolts 72, fixing nuts 73, a cushion block 74 and an electromagnetic plate 75. There are two fixing plates 71. There are four fixing bolts 72 and four fixing nuts 73. The four fixing bolts 72 are respectively installed at the four corners of the opposite surfaces of the two fixing plates 71. The four fixing nuts 73 are respectively installed on the upper parts of the outer surfaces of the four fixing bolts 72. The cushion block 74 is placed on the top end of the lower fixing plate 71. The electromagnetic plate 75 is installed at the bottom end of the lower fixing plate 71.

[0044] As described above, when a vehicle travels on the track body 1, the position sensor 12 detects the passing of a vehicle and can transmit a signal to the electric control box 8. The electric control box 8 sends a signal to the sound and light alarm 10, and the sound and light alarm 10 starts to play "Please pay attention to safety when the vehicle is traveling". When the radar speed sensor 11 detects that the vehicle is speeding, the screen on the electric control box 8 can display the real-time speed and record the speed, and the sound and light alarm 10 starts to play "The vehicle is speeding, please slow down". At the same time, the electric control box 8 controls the electromagnetic plate 75 to cut off the power, so that the rail clamping mechanism 2 falls off from the fixing frame 6 at the top. When the interception frame 21 falls on the track body 1, the trigger 26 contacts the track body 1 and transmits a signal to the electric control box 8, and then the pneumatic control box 9 controls the air cylinder 23 to start. The air cylinder 23 extends and pushes the rail clamping frame 24 to move towards the middle, and the limiting rod 22 is used to guide and limit the rail clamping frame 24, so that the two rail clamping frames 24 move stably together and hold the track body 1. At this time, the friction force of the rail clamping frame 24 clamping the track body 1 is utilized to intercept the speeding vehicle, avoid catastrophic accidents such as derailment and collision caused by the vehicle speeding, improve safety. When intercepting the speeding vehicle, the vehicle will exert a huge impact force on the rail clamping mechanism 2. By rolling the balls 25 on the track body 1, it is convenient for the entire rail clamping mechanism 2 to move smoothly on the track body 1, so that it can withstand this impact force to a certain extent while maintaining its mobility and avoiding interception failure due to jamming.

[0045] Specifically, referring to Figures 1 to 5 As shown, the interception frame 21 is set in a shape of a Chinese character 'ri', the air cylinder 23 is electrically connected to the pneumatic control box 9, both the rail clamping frame 24 and the support frame 5 are set in an L-shaped structure, the trigger 26, the sound and light alarm 10, the radar speed sensor 11 and the position sensor 12 are all electrically connected to the electric control box 8, and the material of the adsorption rod 27 is set as iron; the electromagnetic plate 75 is electrically connected to the electric control box 8, and the two adsorption frames 7 are respectively located directly above the two adsorption rods 27.

[0046] As described above, it can enhance the stability and bearing capacity of the interception frame 21, and is also convenient for the trigger 26 to be installed thereon. The air cylinder 23 is pneumatically controlled by the pneumatic control box 9. The L-shaped structure is used to provide stable support or clamping function. These devices perform data transmission, signal processing and control through the electric control box 8. The iron material may be used to provide magnetic adsorption ability, which is convenient for the adsorption rod 27 to be adsorbed and fixed together with the electromagnetic plate 75. The electromagnetic plate 75 can be electromagnetically controlled through the electric control box 8 to realize the adsorption of the adsorption frame 7 on the adsorption rod 27.

[0047] Embodiment 2:

[0048] Referring to Figure 6 and Figure 7As shown in the figure, the buffer mechanism 3 includes a buffer box 31, reinforcing bars 32, a buffer frame 33, a buffer plate 34, and large buffer springs 35. The buffer box 31 is installed on the outer wall of the intercepting frame 21. There are two reinforcing bars 32, and both of the two reinforcing bars 32 are installed on one side outer wall of the buffer box 31. The buffer frame 33 is inserted and installed on the other side outer wall of the buffer box 31. The buffer plate 34 is installed at the other end of the buffer frame 33. There are multiple large buffer springs 35, and all of the multiple large buffer springs 35 are installed on the inner wall of the buffer frame 33;

[0049] Shock absorbers 36 are installed on both sides of the inner wall of the buffer box 31, and the other ends of the two shock absorbers 36 are both installed at one end of the buffer frame 33. Magnetic blocks 37 are installed in the middle of the inner wall of the buffer box 31 and at the middle of one end of the buffer frame 33. Multiple small buffer springs 38 are installed on the upper and lower parts of the inner wall of the buffer box 31.

[0050] As can be seen from the above, when the rail clamping mechanism 2 intercepts an overspeed vehicle, the vehicle first contacts the buffer plate 34 and pushes the buffer frame 33 to move into the buffer box 31, which can initially buffer the impact force. Then, through the elasticity of the large buffer springs 35 and the small buffer springs 38, the impact force can be buffered secondly. Finally, through the shock absorption of the shock absorbers 36 and the repulsive force between the two magnetic blocks 37, the impact force can be finally buffered, thereby further enhancing the buffer effect, effectively extending the service life of the rail clamping mechanism 2, further reducing the maintenance frequency of the rail clamping mechanism 2 caused by impact, and also reducing the maintenance cost.

[0051] Preferably, referring to Figure 6 and Figure 7 As shown in the figure, the magnetic poles of the two magnetic blocks 37 are the same. The buffer frame 33 and the track body 1 are both arranged in an I-shaped structure. The outer wall of the buffer plate 34 is arranged in an arc structure.

[0052] As can be seen from the above, a repulsive force field is formed between the two magnetic blocks 37, thereby playing a buffering role. The I-shaped structure is used to provide stable support and buffering ability, facilitating the bearing and dispersion of external forces. The buffer plate 34 with an arc structure is used to reduce the impact force and improve the buffer effect.

[0053] Embodiment 3:

[0054] Referring to Figure 8 As shown in the figure, the intercepting mechanism 4 includes a damping brake box 41, a guide wheel set 42, a steel wire rope 43, a fixing ring 44, and a fixing block 45. The damping brake box 41 is installed in the middle of the bottom end of the fixing frame 6. The guide wheel set 42 is installed on the outer wall of the damping brake box 41. The steel wire rope 43 is arranged inside the damping brake box 41. The fixing ring 44 is installed at the other end of the steel wire rope 43. The fixing block 45 is installed at the bottom end of the fixing ring 44.

[0055] As can be seen from the above, when the speeding vehicle pushes the rail-clamping mechanism 2 to move on the rail body 1, due to the fixed installation between the fixed block 45 and the interception frame 21, the fixed ring 44 will pull the steel wire rope 43. At this time, the damping brake box 41 can be controlled to start by the electric control box 8. During the forward movement of the rail-clamping mechanism 2, the steel wire rope 43 is tightened. Furthermore, the speeding vehicle is intercepted by the friction between the damping brake box 41 and the steel wire rope 43, and the vehicle is prevented from continuing to slide by relying on the tensile strength of the steel wire rope 43, thereby providing a stable interception effect.

[0056] Preferably, referring to Figure 8 As shown, the damping brake box 41 is electrically connected to the electric control box 8, and the bottom end of the fixed block 45 is welded and installed with the top end of the interception frame 21.

[0057] As can be seen from the above, the damping brake box 41 can be braked and controlled by the electric control box 8, and the welded installation is used to provide stable connection and support to ensure the firm connection between the fixed block 45 and the interception frame 21.

[0058] Application example:

[0059] This design is applied to the underground roadway transportation environment such as coal mines and metal mines, especially in working conditions with large slopes, many curves, and frequent transportation. In the auxiliary transportation system in coal mine shafts, it can be used to transport personnel, materials, and equipment to prevent accidents such as derailment and falling of single-track hoists due to speeding or brake failure. In the inclined shafts or ramps of metal mines, when the inclination angle exceeds 15°, the single-track hoist is prone to accelerating due to the component of gravity, and this device is needed to achieve emergency braking. In the tunnel construction transportation line, such as tunnel projects like subways and railways, the single-track hoist is used for long-distance material transportation, and the protection device can avoid collision or overturning accidents caused by speeding; This design uses the radar speed sensor 11 to monitor the driving speed of the vehicle in real time. When the speed exceeds the set threshold, the adsorption frame 7 is triggered to cancel the adsorption of the rail-clamping mechanism 2. Subsequently, the rail-clamping mechanism 2 drops on the rail body 1 and holds it, and the rail body 1 is clamped by the friction force to intercept the speeding vehicle, preventing accidents in time and improving safety. By setting the buffer mechanism 3, after the rail-clamping mechanism 2 is activated, the impact force during the collision between the speeding vehicle and the rail-clamping mechanism 2 can be absorbed, avoiding damage to the rail-clamping mechanism 2 caused by the impact and extending its service life. By setting the interception mechanism 4, the tensile force of the steel wire rope 43 is used to prevent the vehicle from continuing to slide, providing a stable interception effect.

[0060] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Monorail hoist stall alarm and car-catching protection device, characterized in that, Comprising: Track body (1); On one side of the top of the track body (1), a rail clamping mechanism (2) is installed. On the outer wall of the rail clamping mechanism (2), two buffer mechanisms (3) are installed. On the top of the rail clamping mechanism (2), an interception mechanism (4) is installed. On the other side of the top of the track body (1), a support frame (5) is installed. At the other end of the support frame (5), a fixing frame (6) is installed. On both sides of the outer surface of the fixing frame (6), adsorption frames (7) are installed; The rail clamping mechanism (2) includes an interception frame (21), a limiting rod (22), a cylinder (23), a rail clamping frame (24), a ball (25), a trigger (26) and an adsorption rod (27). The interception frame (21) is placed on the top of the track body (1). There are two limiting rods (22), two cylinders (23), two rail clamping frames (24) and two adsorption rods (27). The two limiting rods (22) are installed between the inner walls on both sides of the interception frame (21). The two cylinders (23) are respectively installed at both ends of the interception frame (21). The two rail clamping frames (24) are respectively installed at the output ends of the two cylinders (23). There are multiple balls (25), and the multiple balls (25) are respectively embedded in the opposite surfaces of the two rail clamping frames (24). The trigger (26) is embedded in the middle of the bottom end of the interception frame (21). The two adsorption rods (27) are both installed at the top of the interception frame (21).

2. The single-track crane stall alarm and car-catching protection device according to claim 1, characterized in that: In the middle of the top of the fixing frame (6), an electric control box (8) and a pneumatic control box (9) are installed, and the opposite surfaces of the electric control box (8) and the pneumatic control box (9) are installed together. On the top of the electric control box (8) and the pneumatic control box (9), an audible and visual alarm (10) is installed together. On the upper part of one end of the support frame (5), a radar speed sensor (11) is installed. On the upper part of the other end of the support frame (5), a position sensor (12) is installed.

3. The single-track crane stall alarm and car-catching protection device according to claim 2, characterized in that: The interception frame (21) is set in a structure like the Chinese character 'Ri'. The cylinder (23) is electrically connected to the pneumatic control box (9). The rail clamping frame (24) and the support frame (5) are both set in an L-shaped structure. The trigger (26), the audible and visual alarm (10), the radar speed sensor (11) and the position sensor (12) are all electrically connected to the electric control box (8). The material of the adsorption rod (27) is set as iron.

4. The single-track crane stall alarm and car-catching protection device according to claim 1, characterized in that: The adsorption frame (7) includes a fixing plate (71), fixing bolts (72), fixing nuts (73), a cushion block (74) and an electromagnetic plate (75). There are two fixing plates (71). There are four fixing bolts (72) and four fixing nuts (73). The four fixing bolts (72) are respectively installed at the four corners of the opposite surfaces of the two fixing plates (71). The four fixing nuts (73) are respectively installed on the upper parts of the outer surfaces of the four fixing bolts (72). The cushion block (74) is placed on the top of the lower fixing plate (71). The electromagnetic plate (75) is installed at the bottom end of the lower fixing plate (71).

5. The single-track crane stall alarm and car-catching protection device according to claim 4, characterized in that: The electromagnetic plate (75) is electrically connected to the electric control box (8), and the two adsorption frames (7) are respectively located directly above the two adsorption rods (27).

6. The single-track crane stall alarm and car-catching protection device according to claim 1, characterized in that: The buffer mechanism (3) includes a buffer box (31), reinforcing bars (32), a buffer frame (33), a buffer plate (34), and large buffer springs (35). The buffer box (31) is installed on the outer wall of the intercepting frame (21). There are two reinforcing bars (32), and both of the two reinforcing bars (32) are installed on one outer wall of the buffer box (31). The buffer frame (33) is inserted and installed on the other outer wall of the buffer box (31). The buffer plate (34) is installed at the other end of the buffer frame (33). There are multiple large buffer springs (35), and all of the multiple large buffer springs (35) are installed on the inner wall of the buffer frame (33).

7. The single-track crane stall alarm and car-catching protection device according to claim 6, characterized in that: On both sides of the inner wall of the buffer box (31), shock absorbers (36) are installed, and the other ends of the two shock absorbers (36) are both installed at one end of the buffer frame (33). In the middle of the inner wall of the buffer box (31) and in the middle of one end of the buffer frame (33), magnetic blocks (37) are installed. On the upper and lower parts of the inner wall of the buffer box (31), multiple small buffer springs (38) are installed.

8. The single-track crane stall alarm and car-catching protection device according to claim 7, characterized in that: The magnetic poles of the two magnetic blocks (37) are the same. The buffer frame (33) and the track body (1) are both of I-shaped structures, and the outer wall of the buffer plate (34) is of an arc-shaped structure.

9. The single-track crane stall alarm and car-catching protection device according to claim 1, characterized in that: The intercepting mechanism (4) includes a damping brake box (41), a guide wheel set (42), a steel wire rope (43), a fixing ring (44), and a fixing block (45). The damping brake box (41) is installed in the middle of the bottom end of the fixing frame (6). The guide wheel set (42) is installed on the outer wall of the damping brake box (41). The steel wire rope (43) is arranged inside the damping brake box (41). The fixing ring (44) is installed at the other end of the steel wire rope (43). The fixing block (45) is installed at the bottom end of the fixing ring (44).

10. The single-track crane stall alarm and car-catching protection device according to claim 9, characterized in that: The damping brake box (41) is electrically connected to the electric control box (8), and the bottom end of the fixing block (45) is welded and installed together with the top end of the intercepting frame (21).

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