Upstroke limiting device suitable for vertical shaft lifting

Abstract

The utility model relates to an ascending limiting device suitable for vertical shaft lifting. The ascending limiting device comprises a spring baffle, a supporting rod, a buffer spring, a gravity pressing block, a locking nut, a stroke protection switch, a guide sliding sleeve and a U-shaped clamping ring. The device is simple in structure and convenient to use, large economic investment is not needed, and large rigid impact generated when the lifting container makes contact with the protection device is avoided through the buffering and energy storage effects of the buffering spring. As the gravity pressing block is easy to replace, the purpose that the gravity pressing block is flexibly adjusted along with the stress required by signal transmission of the stroke protection switch can be achieved. The device can effectively solve the problems that the proximity switch of the uplink protection device is high in installation precision, the failure rate is high in the using process, and component replacement and position adjustment are difficult, and the device is easy to operate, economical, applicable and high in field practicability.

Description

Technical Field

[0001] This patent application belongs to the technical field of improving system safety protection equipment. More specifically, it relates to an upward limit device applicable to shaft hoisting. Background Art

[0002] During the construction of underground mines, shaft hoisting equipment is widely used. This type of equipment has the characteristics of high hoisting speed, frequent use, and high system safety requirements. During the operation of the hoisting equipment, to avoid safety accidents caused by overwinding of the hoisting container, relevant specifications clearly require that the shaft hoisting container must stop normally when it reaches the parking position, and must be protected and stopped within 0.5 m when it exceeds the normal parking position. Traditional upward limit protection devices generally use proximity switches and are installed on the wellhead sheave. After the hoisting container overwinds upward and approaches the proximity switch, the proximity switch is triggered to send a protection signal. However, restricted by the detection distance of the proximity switch, in actual use, the installation accuracy requirements for the proximity switch are relatively high, high-precision proximity switches need to be used, and the cost is relatively high. During use, the failure rate of the proximity switch is relatively high, and problems such as damage and false alarms of the proximity switch are likely to occur. At the same time, component replacement and position adjustment are both relatively difficult. Summary of the Utility Model

[0003] The technical problem to be solved by this utility model is to provide an upward limit device applicable to shaft hoisting. This device is simple and convenient, and without large economic investment, it can effectively solve the problems of high installation accuracy of the proximity switch of the upward protection device, high failure rate during use, and difficult component replacement and position adjustment.

[0004] To solve the above problems, the technical solution adopted by this utility model is:

[0005] An upward limit device applicable to shaft hoisting includes a first spring baffle and a second spring baffle arranged up and down, a support rod arranged between the first spring baffle and the second spring baffle, a gravity pressing block located on the first spring baffle, and a buffer spring sleeved on the support rod and located between the first spring baffle and the second spring baffle. The top end of the support rod passes through the first spring baffle and the gravity pressing block in sequence and is locked with the gravity pressing block through a locking nut. A hanging ring is also provided at the top end of the support rod, and the hanging ring is connected with a travel protection switch. The travel protection switch is connected to the hoist through a signal cable;

[0006] The gravity pressing block is located on one side of the cage rope, and a guiding sliding sleeve is sleeved on the cage rope. The guiding sliding sleeve is connected with the gravity pressing block through a clamping device.

[0007] Further, the clamping device is a U-shaped snap ring or a hoop, and multiple groups of the clamping devices are arranged up and down.

[0008] Further, the guiding sliding sleeve is made of organic polymer material, and includes left and right semi-cylindrical bodies. On the outer wall of each semi-cylindrical body, there are a plurality of clamping grooves for the clamping device to be clamped, and inside there is a semi-circular through groove for the cage rope to be inserted.

[0009] Further, the outer wall of one of the semi-cylindrical bodies is an arc wall, which is a semi-cylindrical body, and the outer wall of the other semi-cylindrical body is a straight wall.

[0010] Further, the locking nut is an internal hexagonal nut.

[0011] Further, a protective plate is vertically provided on the first spring baffle, and the protective plate is located outside the gravity pressing block.

[0012] Further, the gravity pressing block is square and is a steel block.

[0013] Due to the adoption of the above technical solutions, the beneficial effects obtained by the present utility model are as follows:

[0014] This device utilizes a simple structural principle to effectively solve the problems that the installation accuracy requirements of the upward protection device proximity switch are relatively high, the failure rate during use is relatively high, it is prone to damage and false alarms, and it is relatively difficult to replace components and adjust positions. By utilizing the buffering and energy storage functions of the buffer spring, a large rigid impact generated when the lifting container contacts the protection device is avoided. Since the gravity pressing block is easy to replace, the force required for the gravity pressing block to send the signal of the travel protection switch can be flexibly adjusted according to the stroke, and the method is simple, economical and applicable, and has strong on-site practicability. The device has a simple and reliable structure, is convenient to adjust, has a low economic investment, and has strong on-site practicability. Description of the Drawings

[0015] Figure 1 is the installation position diagram of the present utility model.

[0016] Figure 2 is the enlarged structural schematic diagram of the present utility model.

[0017] Figure 3 is the structural schematic diagram of the guiding sliding sleeve in the present utility model.

[0018] The markings in the figure are as follows: the first spring baffle 11, the second spring baffle 12, the support rod 2, the buffer spring 3, the gravity pressing block 4, the locking nut 5, the travel protection switch 6, the guiding sliding sleeve 7, the clamping groove 71, the semi-circular through groove 72, the U-shaped clamping ring 8, the protective plate 9, the shaft shaft wall 10, the head sheave 13, the hoist 14, the signal cable 15, the cage 16, the hoisting derrick 17, the cage rope 18. Specific Embodiment

[0019] The following further describes the present utility model in detail with reference to the embodiments.

[0020] An upward limit device applicable to shaft hoisting, installed at the position as shown in Figure 1 shown below, Figure 1 in which, at the bottom is the shaft shaft 10, and above is the hoisting derrick 17. There is a cage 16 inside the hoisting derrick 17, and the cage 16 is connected to the hoist 14 through a sheave 13. The device is shown at the circled part.

[0021] As shown in Figure 2 , the specific structure of the device is as follows: It includes a first spring baffle 11 and a second spring baffle 12 arranged up and down, a support rod 2 arranged between the first spring baffle 11 and the second spring baffle 12, a gravity weight 4 located on the first spring baffle 11, and a buffer spring 3 sleeved on the support rod 2 and located between the first spring baffle 11 and the second spring baffle 12. The top end of the support rod 2 passes through the first spring baffle 11 and the gravity weight 4 in sequence and is locked with the gravity weight 4 through a lock nut 5. A lifting ring is also provided at the top end of the support rod 2, and the lifting ring is connected to a travel protection switch 6. The travel protection switch 6 is connected to the hoist 14 through a signal cable 15.

[0022] As shown in Figure 2 , the gravity weight 4 is located on one side of the cage guide rope 18, and a guide sliding sleeve 7 is sleeved on the cage guide rope 18. The guide sliding sleeve 7 is connected to the gravity weight 4 through a clamping device.

[0023] As shown in Figure 3 , the guide sliding sleeve 7 is made of rubber or other organic polymer materials. The organic polymer materials can be non-biological polymers such as synthetic rubber, synthetic resin, and synthetic fiber. The guide sliding sleeve 7 includes semi-cylinders arranged left and right. A plurality of clamping grooves 71 for clamping by the clamping device are provided on the outer wall of each semi-cylinder, and a semi-circular through groove 72 for the cage guide rope 18 to be sleeved into is provided inside. The clamping device is a U-shaped snap ring 8 or a hoop, and multiple groups of the clamping device are arranged up and down. In Figure 3 , the outer wall of one of the semi-cylinders (right side) is an arc wall and it is a semi-cylindrical body, and the outer wall of the other semi-cylinder (left side) is a straight wall, that is, one on the right side is a semi-cylindrical tube and one on the left side is a brick-shaped tube.

[0024] As shown in Figure 2 , in order to strengthen the protection, a protection plate 9 is vertically provided on the first spring baffle 11. The protection plate 9 is located outside the gravity weight 4 to prevent the gravity weight 4 from shifting. During design, the gravity weight 4 is square and it is a steel block, and the lock nut 5 is an internal hexagonal nut.

[0025] As shown in Figure 1 、 Figure 2As shown, the device is a safety protection device for the hoisting system. The device is arranged at the wellhead position of the shaft hoisting system. The travel protection switch 6 is suspended at the overwind protection position of the hoisting container moving upward via the signal cable 15. The buffer spring 3, together with the spring pressing plate 1, the support rod 2, the gravity weight 4, and the locking nut 5, forms a buffer and force-applying integral body, and is connected to the travel protection switch 6 via the eyelet at the end of the support rod 2. A guiding sliding sleeve 7 is installed on the side of the gravity weight 4, and the guiding sliding sleeve 7 is connected to the gravity weight 4 via the U-shaped snap ring 8 to form a whole, enabling the device to move up and down along the hoisting rope of the hoisting container and avoiding shaking. The device has a simple structure and high stability, and is relatively convenient for personnel to install and maintain.

[0026] During the normal operation of the hoisting system, the travel protection switch 6 is in the break point state under the natural gravity pull of the gravity weight 4, and the hoisting electric control system recognizes it as a safe state. Only when the hoisting container moves upward and overwinds, and the hoisting container supports the gravity weight 4 upward, resulting in the disappearance of the pulling force on the travel protection switch 6, can the upward limit protection device be finally triggered to generate a protection signal, and the hoisting system brakes and stops. When the upward limit protection device needs to adjust the protection height or replace components, the device can be directly lifted or lowered using the signal cable 15.

[0027] The working process of the present utility model is as follows:

[0028] When the hoisting container of the hoist 14 moves upward and overwinds, the hoisting container continues to move upward beyond the normal stop position. The upper edge of the hoisting container body contacts the first spring baffle 11. Due to the buffering and energy storage effects of the buffer spring 3, a large rigid impact during the contact process between the hoisting container and the protection device is avoided. When the upward travel height of the hoisting container exceeds the elongation of the buffer spring 3 and transfers the upward supporting force to the gravity weight 4, the pulling force of the natural gravity of the gravity weight 4 on the travel protection switch 6 disappears. When the travel protection switch 6 resets and reaches the signal sending travel, the travel protection switch 6 sends a protection signal, and the electric control system of the hoist 14 provides safety protection, and the hoisting system protects and stops. By using the buffering and energy storage effects of the buffer spring 3, a large rigid impact during the contact between the hoisting container and the protection device is avoided. At the same time, by utilizing the replaceable characteristic of the gravity weight 4, the force required for the gravity weight 4 to send a signal along with the travel protection switch 6 can be flexibly adjusted. When the upward limit protection device needs to adjust the protection height or replace components, the device can be directly lifted or lowered.

[0029] The natural gravity of the gravity weight 4 should match the force required for the travel protection switch 6 to act, neither too large nor too small, so as to avoid damage to the travel protection switch 6 caused by excessive gravity or the situation where the action travel of the travel protection switch 6 cannot reach the position due to too small gravity.

Claims

1. An upward limit device applicable to shaft hoisting, characterized in that: It includes a first spring baffle (11) and a second spring baffle (12) arranged vertically, a support rod (2) arranged between the first spring baffle (11) and the second spring baffle (12), a gravity pressing block (4) located on the first spring baffle (11), and a buffer spring (3) sleeved on the support rod (2) and located between the first spring baffle (11) and the second spring baffle (12). The top end of the support rod (2) passes through the first spring baffle (11) and the gravity pressing block (4) in sequence and is locked with the gravity pressing block (4) through a lock nut (5). A lifting ring is also arranged at the top end of the support rod (2), and the lifting ring is connected with a travel protection switch (6). The travel protection switch (6) is connected with a hoist (14) through a signal cable (15); On one side of the gravity pressing block (4) is a guide rope (18), and a guide sliding sleeve (7) is sleeved on the guide rope (18). The guide sliding sleeve (7) is connected with the gravity pressing block (4) through a clamping device.

2. The upward limit device applicable to shaft hoisting according to claim 1, wherein: The clamping device is a U-shaped clamp (8) or a hoop, and multiple groups of the clamping devices are arranged vertically.

3. The upward limit device applicable to shaft hoisting according to claim 1, characterized in that: The guide sliding sleeve (7) includes semi-cylindrical bodies arranged left and right. On the outer wall of each semi-cylindrical body, there are multiple clamping grooves (71) for the clamping device to be clamped, and inside, there is a semi-circular through groove (72) for the guide rope (18) to be sleeved.

4. An upward limit device applicable to shaft hoisting according to claim 3, characterized in that: The outer wall of one of the semi-cylindrical bodies is an arc wall and it is a semi-cylindrical body, and the outer wall of the other semi-cylindrical body is a straight wall.

5. The up-limit device applicable to shaft hoisting according to claim 1, characterized in that: The lock nut (5) is an internal hexagonal nut.

6. An upward limit device applicable to shaft hoisting according to any one of claims 1-5, characterized in that: A protective plate (9) is vertically arranged on the first spring baffle (11), and the protective plate (9) is located outside the gravity pressing block (4).

7. The upward limit device applicable to shaft hoisting according to claim 6, characterized in that: The gravity pressing block (4) is square and it is a steel block.

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