A crane wire rope off groove stop alarm device

Abstract

A kind of crane wire rope is out of groove shutdown alarm device, belong to crane fixed pulley set equipment technical field, for wire rope is out of groove after shutdown and alarm.Its technical scheme is: wire rope is out of groove top plate is located above the fixed pulley of crane main hook, two top plate mounting supports are fixed respectively on the fixed pulley mounting frame of left and right sides above the fixed pulley, two limit switches fixed supports are fixed respectively on the fixed pulley mounting frame outside two top plate mounting supports, two limit switches are fixed respectively on two limit switches fixed supports, the inner end of two limit switch contact rods is fixed respectively on the upper surface of wire rope is out of groove top plate, the outer end of two limit switch contact rods is connected with two limit switches respectively, two limit switches are connected with the control circuit of crane main hook respectively.The utility model can stop crane main hook operation in time when crane wire rope is out of groove, and send out alarm, avoid causing safety accident and equipment damage.

Description

Technical Field

[0001] This utility model relates to a device for stopping and alarming a crane after its wire rope has come out of the groove, belonging to the technical field of crane fixed pulley block equipment. Background Technology

[0002] Cranes are commonly used special equipment in industrial and mining enterprises for moving heavy objects. Crane operation safety is crucial, especially when moving heavy loads, to prevent injuries caused by wear and breakage of the fixed pulley shaft and wire rope. However, wire rope derailment during crane operation is an unavoidable mechanical accident, due to several reasons: First, the varying lengths and sizes of the objects being moved, coupled with limited space in mining areas, inevitably lead to operators pulling the crane at an angle, causing the wire rope to derail. Second, operators may be unfamiliar with crane operation, lowering the wire rope too much, resulting in derailment. Third, the widespread use of remote controls for crane operation in enterprises makes it difficult to observe wire rope derailment due to the crane's height and the concealed nature of the fixed pulleys, allowing operators to continue working and causing accidents. Finally, operating cranes at night often results in less concentration, making it difficult to detect wire rope derailment and increasing the risk of accidents.

[0003] Therefore, how to stop the crane operation in time after the wire rope of the crane derails, so as to prevent safety accidents and avoid equipment damage, is an urgent problem for technicians to solve. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a crane wire rope derailment shutdown alarm device. When the crane wire rope derails due to skewed pulling, this device can stop the crane main hook operation in time and issue an alarm to the operator to avoid safety accidents and further damage to the equipment caused by continued use after the wire rope derails.

[0005] The technical solution to the above technical problem is: A crane wire rope derailment alarm device includes a wire rope derailment top plate, top plate mounting brackets, limit switch fixing brackets, limit switches, and limit switch contact rods. The wire rope derailment top plate is a rectangular steel plate located above the fixed pulley of the crane's main hook. The lower surface of the top plate is opposite to the upper surface of the wire rope in the fixed pulley. Two top plate mounting brackets are fixed to the fixed pulley mounting frames on the left and right sides above the fixed pulley, respectively. The two ends of the wire rope derailment top plate are slidably connected to the two top plate mounting brackets. Two limit switch fixing brackets are fixed to the fixed pulley mounting frames on the outer sides of the two top plate mounting brackets. Two limit switches are fixed to the two limit switch fixing brackets. The inner ends of the two limit switch contact rods are fixed to the two ends of the upper surface of the wire rope derailment top plate, respectively. The outer ends of the two limit switch contact rods are connected to the two limit switches, respectively. The two limit switches are connected to the control circuit of the crane's main hook.

[0006] The aforementioned crane wire rope derailment stop alarm device comprises a top plate mounting bracket consisting of a support rod and two adjusting nuts. The lower end of the support rod is vertically fixed to a fixed pulley mounting bracket. The support rod is a screw rod. The two adjusting nuts are respectively threaded to the upper and lower parts of the support rod. The top plate of the wire rope derailment has sliding holes at both ends. The sliding holes at both ends are respectively fitted onto the support rods of the two top plate mounting brackets. The inner wall of the sliding hole is in sliding fit with the support rod. The adjusting nut at the lower part of the support rod rests against the lower surface of the top plate of the wire rope derailment.

[0007] The aforementioned crane wire rope derailment stop alarm device comprises a limit switch fixing bracket consisting of a fixing rod and a fixing nut. The lower end of the fixing rod is vertically fixed to the fixed pulley mounting bracket by the fixing nut. The limit switch is fixed to the upper part of the fixing rod. The position of the limit switch is above the plane of the wire rope derailment top plate. The switch contact of the limit switch is located on the lower surface of the limit switch and is opposite to the upper surface of the limit switch contact rod.

[0008] The aforementioned crane wire rope derailment alarm device has two limit switches with vertical insert plates on their outer sides. Each insert plate has a vertically oriented elongated insertion hole, the width of which matches the diameter of the two limit switch contact rods. The outer ends of the two limit switch contact rods are inserted into the elongated insertion holes of the two limit switch insert plates, and the two limit switch contact rods and the elongated insertion holes slide vertically together. The upper surfaces of the outer ends of the two limit switch contact rods are respectively opposite to the switch contacts of the two limit switches.

[0009] The aforementioned crane wire rope derailment stop alarm device also includes an alarm, which is installed on the crane. The alarm's start control circuit is connected to the switch contacts of the limit switch.

[0010] The beneficial effects of this utility model are: The wire rope derailment top plate of this invention is located above the fixed pulley of the crane's main hook. When the wire rope derails, it will push the wire rope derailment top plate upward. Both ends of the wire rope derailment top plate are fixedly connected to the inner ends of two limit switch contact rods, and the inner surfaces of the outer ends of the two limit switch contact rods are opposite to the switch contacts of the two limit switches. When the wire rope derailment top plate moves upward, the two limit switch contact rods move upward, triggering the switch contacts of the two limit switches. The limit switches disconnect the power supply circuit of the crane's main hook, stopping the crane's main hook and preventing safety accidents. The limit switches are connected to an alarm, which simultaneously alerts the operator when the crane's main hook stops running.

[0011] This utility model has a simple structure and is easy to use. It does not affect the main hook structure of the crane. It can stop the operation of the main hook of the crane in time when the crane wire rope is pulled off the groove due to skew or oblique pulling, and issue an alarm to the operator to avoid safety accidents and further damage to the equipment caused by the continued use of the wire rope after it has been pulled off the groove. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] The following are the markings in the diagram: 1. Fixed pulley mounting bracket; 2. Fixed pulley; 3. Wire rope; 4. Wire rope chute top plate; 5. Top plate mounting bracket; 6. Limit switch fixing bracket; 7. Limit switch contact rod; 8. Support rod; 9. Adjusting nut; 10. Fixing rod; 11. Fixing nut; 12. Insert plate; 13. Switch contact; 14. Detailed Implementation

[0014] This utility model consists of a wire rope grooving top plate 4, a top plate mounting bracket 5, a limit switch fixing bracket 6, a limit switch 7, and a limit switch contact rod 8.

[0015] As shown in the diagram, the wire rope de-grooving top plate 4 is a rectangular steel plate located above the fixed pulley 2 of the crane's main hook. The lower surface of the wire rope de-grooving top plate 4 is opposite to the upper surface of the wire rope 3 in the fixed pulley 2. When the wire rope 3 de-grooves due to oblique pulling, it will push the wire rope de-grooving top plate 4 upwards. The wire rope de-grooving top plate 4 triggers the limit switch 7 through the limit switch contact rod 8, stopping the operation of the crane's main hook.

[0016] As shown in the figure, the two ends of the wire rope grooving top plate 4 are connected to two top plate mounting brackets 5 respectively. The two top plate mounting brackets 5 are fixed on the fixed pulley mounting brackets 1 on the left and right sides above the main hook fixed pulley 2 respectively.

[0017] The top plate mounting bracket 5 consists of a support rod 9 and two adjusting nuts 10. The lower end of the support rod 9 is vertically fixed to the fixed pulley mounting bracket 1. The support rod 9 is a screw rod, and the two adjusting nuts 10 are threaded to the upper and lower parts of the support rod 9, respectively. The wire rope degrooving top plate 4 has sliding holes at both ends. These sliding holes are respectively fitted onto the support rods 9 of the two top plate mounting brackets 5. The inner walls of the sliding holes are in sliding fit with the support rods 9. The adjusting nuts 10 at the lower part of the support rods 9 rest against the lower surface of the wire rope degrooving top plate 4. By rotating the adjusting nuts 10 at the lower part of the support rods upwards or downwards, the distance between the surface of the wire rope degrooving top plate 4 and the wire rope 3 can be adjusted to achieve a better anti-degrooving effect.

[0018] As shown in the figure, the limit switch 7, which cooperates with the wire rope grooving top plate 4, is fixed on the limit switch fixing bracket 6, and the two limit switch fixing brackets 6 are respectively fixed on the fixed pulley mounting brackets 1 on the outside of the two top plate mounting brackets 5.

[0019] The limit switch fixing bracket 6 consists of a fixing rod 11 and a fixing nut 12. The lower end of the fixing rod 11 is vertically fixed to the fixed pulley mounting bracket 1 by the fixing nut 12. The limit switch 7 is fixed on the upper part of the fixing rod 11. The position of the limit switch 7 is above the surface of the wire rope grooving top plate 4. The switch contact 14 of the limit switch 7 is located on the lower surface of the limit switch 7. The switch contact 14 is opposite to the upper surface of the limit switch contact rod 8.

[0020] As shown in the figure, the wire rope grooving top plate 4 is triggered by the limit switch contact rod 8 to activate the limit switch 7. The inner ends of the two limit switch contact rods 8 are fixed to the two ends of the upper surface of the wire rope grooving top plate 4, and the outer ends of the two limit switch contact rods 8 are connected to the limit switch 7 for activation.

[0021] The triggering connection structure between the limit switch contact rod 8 and the limit switch 7 is as follows: Each of the two limit switches 7 has a vertical insert plate 13 on its outer side. The insert plate 13 has a vertically oriented elongated insertion hole, the width of which matches the diameter of the two limit switch contact rods 8. The outer ends of the two limit switch contact rods 8 are respectively inserted into the elongated insertion holes of the insert plates 13 of the two limit switches 7. The limit switch contact rods 8 and the elongated insertion holes are in a sliding fit, allowing the limit switch contact rods 8 to move up and down within the elongated insertion holes. The inner upper surfaces of the outer ends of the two limit switch contact rods 8 are respectively opposite to the switch contacts 14 of the two limit switches 7. When the wire rope chute top plate 4 is lifted upwards by the wire rope, the end of the limit switch contact rod 8 connected to the wire rope chute top plate 4 moves upwards along with the wire rope chute top plate 4, triggering the switch contacts 14 of the limit switches 7.

[0022] This utility model also includes an alarm device, which is installed on the crane. The alarm device's start-up control circuit is connected to the switch contact 14 of the limit switch 7.

[0023] The working process of this utility model is as follows: Rotate the adjusting nut 10 at the bottom of the support rod 9 of the top plate mounting bracket 5 to adjust the distance between the wire rope grooving top plate 4 and the upper end of the fixed pulley 2, so that the distance between the lower surface of the wire rope grooving top plate 4 above the adjusting nut 10 and the upper end of the fixed pulley 2 is 10mm, and the diameter of the wire rope 3 is 18mm. The angle between the limit switch contact rod 8 and the wire rope trough top plate 4 is 30 degrees, and the outer end of the limit switch contact rod 8 is inserted into the long insertion hole of the limit switch 7's insertion plate 13. When the wire rope 3 is pulled at an angle, it will slide out of the pulley groove of the fixed pulley 2. During the sliding out process, the wire rope 3 will push the wire rope release plate 4 upward. When the wire rope release plate 4 moves upward, it will drive the limit switch contact rod 8 connected to one end of the wire rope release plate 4 to move upward. Since the other end of the limit switch contact rod 8 is inserted into the long insertion hole of the insertion plate 13 of the limit switch 7, the limit switch contact rod 8 can move upward along the long insertion hole, so that the upper surfaces of the two limit switch contact rods 8 respectively contact the switch contacts 14 of the two limit switches 7. The upward movement of the limit switch contact rod 8 triggered the switch contact 14 of the limit switch 7, which disconnected the power supply circuit of the crane main hook, causing the crane main hook to stop running and preventing a safety accident. Limit switch 7 is connected to the alarm, which will alert the operator when the crane's main hook stops running.

[0024] An embodiment of this utility model is as follows: The diameter of wire rope 3 is 18mm; The length of the wire rope grooving top plate 4 is 800mm, the width is 60mm, and the thickness is 6mm; The support rod 9 of the top plate mounting bracket 5 is 150mm long and 10mm in diameter. The length of the fixing rod 11 of the limit switch fixing bracket 6 is 300mm and the diameter is 10mm; The limit switch 7 is model CHNT-YBLX3 / 11H; The limit switch contact rod 8 is 200mm long and 5mm in diameter.

Claims

1. A crane wire rope derailment alarm device, characterized in that: It includes a wire rope degrooving top plate (4), a top plate mounting bracket (5), a limit switch fixing bracket (6), a limit switch (7), and a limit switch contact rod (8). The wire rope degrooving top plate (4) is a rectangular steel plate. The wire rope degrooving top plate (4) is located above the fixed pulley (2) of the crane's main hook. The lower surface of the wire rope degrooving top plate (4) is opposite to the upper surface of the wire rope (3) in the fixed pulley (2). The two top plate mounting brackets (5) are respectively fixed on the fixed pulley mounting brackets (1) on the left and right sides above the fixed pulley (2). The two ends of the wire rope degrooving top plate (4) The two limit switch mounting brackets (5) are connected to the two top plate mounting brackets (5) in an up-down sliding fit. The two limit switch mounting brackets (6) are fixed on the fixed pulley mounting brackets (1) on the outside of the two top plate mounting brackets (5). The two limit switches (7) are fixed on the two limit switch mounting brackets (6). The inner ends of the two limit switch contact rods (8) are fixed on the two ends of the upper surface of the wire rope grooving top plate (4). The outer ends of the two limit switch contact rods (8) are connected to the two limit switches (7). The two limit switches (7) are connected to the control circuit of the crane main hook.

2. The crane wire rope derailment alarm device according to claim 1, characterized in that: The top plate mounting bracket (5) consists of a support rod (9) and two adjusting nuts (10). The lower end of the support rod (9) is vertically fixed on the fixed pulley mounting bracket (1). The support rod (9) is a screw rod. The two adjusting nuts (10) are respectively threaded to the upper and lower parts of the support rod (9). The two ends of the wire rope grooving top plate (4) have sliding holes. The sliding holes at both ends are respectively fitted onto the support rods (9) of the two top plate mounting brackets (5). The inner wall of the sliding hole is in sliding fit with the support rod (9). The adjusting nut (10) at the lower part of the support rod (9) rests on the lower surface of the wire rope grooving top plate (4).

3. The crane wire rope derailment alarm device according to claim 1, characterized in that: The limit switch fixing bracket (6) consists of a fixing rod (11) and a fixing nut (12). The lower end of the fixing rod (11) is vertically fixed to the fixed pulley mounting bracket (1) by the fixing nut (12). The limit switch (7) is fixed on the upper part of the fixing rod (11). The position of the limit switch (7) is above the plane of the wire rope grooving top plate (4). The switch contact (14) of the limit switch (7) is located on the lower surface of the limit switch (7). The switch contact (14) is opposite to the upper surface of the limit switch contact rod (8).

4. The crane wire rope derailment alarm device according to claim 1, characterized in that: The two limit switches (7) have vertical insert plates (13) on their outer sides. The insert plates (13) have long holes in the vertical direction. The width of the long holes matches the diameter of the two limit switch touch rods (8). The outer ends of the two limit switch touch rods (8) are inserted into the long holes of the insert plates (13) of the two limit switches (7). The two limit switch touch rods (8) and the long holes are in a sliding fit. The upper surface of the outer end of the two limit switch touch rods (8) is opposite to the switch contacts (14) of the two limit switches (7).

5. The crane wire rope derailment alarm device according to claim 1, characterized in that: It also has an alarm, which is installed on the crane. The alarm's start control circuit is connected to the switch contact (14) of the limit switch (7).

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