A propeller coal feeder tow cable protection device

Abstract

This utility model discloses a cable protection device for an impeller feeder, comprising a first bracket fixed to the impeller feeder body; a telescopic component disposed on the first bracket, with a connecting rod connected to the end of the telescopic component away from the first bracket, the end of the connecting rod being used to connect a cable trolley via a traction rope; a second bracket also disposed on the first bracket and located below the telescopic component, with a detection unit provided at the end of the second bracket near the connecting rod, the detection unit being used to detect the axial displacement of the telescopic component; and a transmission component, one end connected to the detection unit and the other end connected to the impeller feeder body; wherein, when the axial displacement of the telescopic component exceeds the threshold of the detection unit, the transmission component transmits a signal to the impeller feeder body, thereby stopping the impeller feeder body to protect the cable.

Description

Technical Field

[0001] This utility model belongs to the technical field of impeller coal feeders, and specifically relates to a drag cable protection device for an impeller coal feeder. Background Technology

[0002] As a specialized piece of equipment for coal extraction in slotted coal trenches, the impeller feeder can travel longitudinally along the trench. Its upper impeller delves into the trench to extract coal, which then falls onto the conveyor belt below, enabling continuous coal extraction. It is widely used in industrial applications such as coal transportation. During operation, the power and control cables of the impeller feeder must move synchronously with the longitudinal movement of the equipment. The cable trolley, as a key load-bearing component for cable movement, directly affects the stability of the equipment's operation.

[0003] However, the on-site working environment has a high dust concentration, and the equipment needs to run continuously for a long time. The cable trolley is prone to jamming due to dust accumulation, component wear, or track obstruction. Once the cable trolley is jammed, the continuously moving impeller feeder will exert continuous tension on the cable, causing the cable to be stretched and damaged. This will not only cause equipment shutdown and production stoppage, resulting in economic losses, but may also cause safety hazards such as short circuits and leakage, threatening on-site work safety.

[0004] To address the aforementioned issues, existing technologies primarily employ manual inspections for accident prevention. However, manual inspections cannot achieve real-time monitoring of the cable trolley's jamming status and suffer from delayed response, making it difficult to prevent excessive cable stretching and damage. Existing related patents, such as "Limit Protection Device and Method for Preventing Breakage of Coal Feeder Sliding Cable," use spring-type limiters to prevent excessive stretching when the cable trolley is jammed. However, such devices only address jamming during unidirectional movement of the cable trolley and cannot solve the problem of excessive compression damage to the cable trolley and cable caused by jamming during the return journey, thus limiting the protection scenarios. Utility Model Content

[0005] The purpose of this utility model is to provide a cable protection device for an impeller feeder, which can solve the technical defects of the prior art that cannot solve the problem of excessive compression and damage to the cable trolley and cable caused by jamming during the return of the cable trolley.

[0006] The technical solution adopted in this utility model is as follows: A cable protection device for an impeller feeder includes: The first support is fixed on the body of the impeller feeder; A telescopic assembly is mounted on the first support. A connecting rod is connected to the end of the telescopic assembly away from the first support. The end of the connecting rod is used to connect to the towing cable trolley via a traction rope. The second bracket is also mounted on the first bracket and located below the telescopic assembly. The end of the second bracket near the connecting rod is provided with a detection unit, which is used to detect the axial displacement of the telescopic assembly. The transmission component is connected at one end to the detection unit and at the other end to the impeller feeder body; When the axial displacement of the telescopic component exceeds the threshold of the detection unit, the transmission component transmits a signal to the impeller feeder body to stop the impeller feeder body and protect the drag cable.

[0007] Furthermore, the telescopic component includes: The inner cylinder is mounted on the first support. The telescopic unit is connected to the inner cylinder and coincides with the axial direction of the inner cylinder; The outer cylinder is fixedly connected to the end of the telescopic unit and is located outside the inner cylinder; Among them, under the action of the telescopic unit, the outer cylinder can move closer to or further away from the inner cylinder; The sensing block is mounted on the outer cylinder and located above the detection unit, parallel to the axis of the detection unit.

[0008] Furthermore, the telescopic unit is a cylindrical spring or a conical spring.

[0009] Furthermore, it also includes: The dustproof component is connected at one end to the outside of the inner cylinder and at the other end to the outside of the outer cylinder.

[0010] Furthermore, the dustproof component is secured between the outer side of the inner cylinder and the outer side of the outer cylinder.

[0011] Furthermore, the dustproof component is a dust cover.

[0012] Furthermore, the detection unit is a proximity switch.

[0013] Furthermore, the first support and the second support are axially parallel.

[0014] Furthermore, the transmission element is a signal line.

[0015] Furthermore, the second support has an L-shaped structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By detecting the axial displacement of the telescopic component, the system can simultaneously respond to jamming scenarios during both forward and return travel of the cable trolley. Whether the cable is stretched and jammed during forward travel or squeezed and jammed during return travel, the detection unit can trigger a stop signal as long as the displacement of the telescopic component exceeds the threshold. This solves the limitation of existing spring-type limiters that can only handle unidirectional jamming and achieves cable protection under all working conditions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram illustrating the application of a drag cable protection device for an impeller feeder provided by this utility model; Figure 2 A schematic diagram of the assembly of the inner cylinder, spring and outer cylinder in a drag cable protection device for an impeller coal feeder provided by this utility model; In the diagram: 1. Cable track; 2. Cable trolley; 3. Cable; 4. Traction rope; 5. Telescopic assembly; 5a. Inner cylinder; 5b. Spring; 5c. Outer cylinder; 5d. Sensing block; 5e. Dustproof component; 6. Connecting rod; 7. First support; 8. Detection unit; 9. Second support; 10. Transmission component; 11. Impeller feeder body. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] To address the technical deficiencies mentioned in the background section, the present invention will be further described in detail below with reference to the accompanying drawings: like Figures 1-2As shown, a cable protection device for an impeller feeder includes a first bracket 7, which is fixed on the impeller feeder body 11; a telescopic component 5, which is mounted on the first bracket 7, with a connecting rod 6 connected to the end of the telescopic component 5 away from the first bracket 7, and the end of the connecting rod 6 being used to connect the cable trolley 2 via a traction rope 4; a second bracket 9, which is also mounted on the first bracket 7 and located below the telescopic component 5, with a detection unit 8 at the end of the second bracket 9 near the connecting rod 6, the detection unit 8 being used to detect the axial displacement of the telescopic component 5; and a transmission component 10, one end of which is connected to the detection unit 8 and the other end of which is connected to the impeller feeder body 11; wherein, when the axial displacement of the telescopic component 5 exceeds the threshold of the detection unit 8, the transmission component 10 transmits a signal to the impeller feeder body 11 to stop the impeller feeder body 11 and protect the cable 3.

[0023] In the above structure, the detection threshold of the detection unit 8 is preset in advance, so that the protection device can respond to the jamming scenarios when the cable trolley 2 is moving forward and returning by detecting the axial displacement of the telescopic component 5. Whether the cable 3 is stretched and jammed during forward movement or squeezed and jammed during return movement, as long as the displacement of the telescopic component 5 exceeds the threshold, the detection unit 8 can trigger a stop signal, which solves the limitation of the existing spring limiter that can only deal with unidirectional jamming and realizes cable 3 protection under all working conditions.

[0024] In addition, the detection unit 8 can directly monitor the axial displacement of the telescopic component 5 and capture the jamming status of the cable trolley 2 in real time without manual inspection. Once an abnormality occurs, the transmission component 10 can immediately feed the signal back to the impeller feeder body 11 and trigger a shutdown, avoiding damage to the cable 3 caused by continuous stretching or compression, reducing equipment downtime, and ensuring on-site operation safety and production continuity.

[0025] Since the first support 7 is fixed on the impeller feeder body 11, there is no need to make major modifications to the original structure of the equipment, resulting in low installation and maintenance costs.

[0026] like Figure 1 As shown, the telescopic assembly 5 includes an inner cylinder 5a, which is mounted on the first support 7; a telescopic unit connected to the inner cylinder 5a and axially aligned with the inner cylinder 5a; and an outer cylinder 5c fixed to the end of the telescopic unit and located outside the inner cylinder 5a. Under the action of the telescopic unit, the outer cylinder 5c can move closer to or further away from the inner cylinder 5a by sliding relative to it. A sensing block 5d is mounted on the outer cylinder 5c and located above the detection unit 8, parallel to the axial direction of the detection unit 8.

[0027] Specifically, the telescopic unit is spring 5b; in one embodiment, spring 5b is a cylindrical spring; in another embodiment, spring 5b is a conical spring.

[0028] Specifically, detection unit 8 is a proximity switch.

[0029] Based on the rigidity and extension properties of spring 5b, this solution configures a detection unit 8 and sets a sensing threshold. When the cable trolley 2 gets stuck, the abnormal force it generates will cause spring 5b to be over-compressed or over-stretched, causing the sensing block 5d to move away from the sensing range of the detection unit 8. At this time, the detection unit 8 cannot detect the signal from the sensing block 5d. This abnormal signal will be transmitted to the impeller feeder body 11 in real time through the transmission component 10, controlling the travel motor of the impeller feeder body 11 to stop rotating immediately, preventing the equipment from continuing to move and causing continuous damage to the cable 3, cable trolley 2, and traction rope 4.

[0030] Once the jamming fault is cleared and the cable trolley 2 returns to normal operation, the spring 5b automatically rebounds and resets under its own elasticity, the sensing block 5d re-enters the sensing area of ​​the detection unit 8, the alarm is cleared, and the impeller feeder body 11 can resume normal production operation without manual intervention, which not only ensures the safety of the equipment and the cable 3, but also ensures the continuity of production.

[0031] In this solution, to further improve the reliability and service life of the telescopic assembly 5 during use, the telescopic assembly 5 also includes a dustproof component 5e, such as... Figure 1 As shown, one end of the dustproof component 5e is connected to the outside of the inner cylinder 5a, and the other end is connected to the outside of the outer cylinder 5c, forming a closed protective structure. This effectively blocks high-concentration dust, coal slag, and other impurities from entering the telescopic component 5, preventing impurities from adhering to the surface of the spring 5b or getting stuck in the gap between the inner cylinder 5a and the outer cylinder 5c. This prevents the spring 5b from getting stuck, corroding, or experiencing increased telescopic resistance, ensuring that the telescopic component 5 can extend and retract flexibly in stuck situations. This also ensures that the detection unit 8 accurately detects the sensing block 5d and prevents the protection mechanism from failing.

[0032] During implementation, the dustproof component 5e is tied between the outer side of the inner cylinder 5a and the outer side of the outer cylinder 5c. The dustproof component 5e is a dustproof sleeve.

[0033] In this scheme, the transmission component 10 is a signal line. The signal line has the characteristics of low signal loss and low transmission delay, which can transmit the jamming abnormal signal captured by the detection unit 8 to the control system of the impeller feeder body 11 in a timely and accurate manner, so as to avoid untimely shutdown caused by signal transmission distortion or lag.

[0034] In this design, the first support 7 and the second support 9 are axially parallel, and the second support 9 has an L-shaped structure.

[0035] In this design, both the inner cylinder 5a and the outer cylinder 5c are made of ordinary carbon steel.

[0036] In application, the cable track 1 is fixed parallel to the longitudinal direction of the coal trench on the pre-embedded parts at the bottom of the trench and must be kept straight. The cable trolley 2 is slidably installed on the cable track 1, and the cable 3 is fixed on each cable trolley 2 to provide power and transmit signals to the impeller feeder body 11. The traction rope 4 connects the adjacent cable trolley 2 and its set length is less than the free length of the cable 3 of the adjacent trolley. The first bracket 7 is fixed on the impeller feeder body 11, the telescopic component 5 is fixed to the first bracket 7, the first end of the connecting rod 6 is fixed to the telescopic component 5, and the second end is connected to the last cable trolley 2 through the traction rope 4. The connecting end is slightly lower than the first cable trolley 2 to ensure that the traction rope 4 will not be pinched or worn during travel.

[0037] The detection unit 8 is installed near the telescopic component 5 via the second bracket 9. It can detect the axial displacement of the telescopic component 5. When the displacement exceeds the threshold, it outputs a shutdown alarm signal. The transmission component 10 is responsible for transmitting the signal to the impeller feeder body system.

[0038] The traction rope 4 can be made of steel wire rope or polymer fiber rope. The towing cable track 1 can be made of C-shaped cold-bent channel steel or H-shaped steel. The welding position must be smooth. The wheels of the towing cable trolley 2 are made of high-quality materials to reduce wear and noise in dusty environments. The detection unit 8 is inductive or magnetic induction type, and the output is a PNP normally open contact, which is directly connected to the emergency stop circuit of the PLC in the impeller feeder body 11.

[0039] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cable protection device for an impeller feeder, characterized in that, include: The first support is fixed on the body of the impeller feeder; A telescopic assembly is mounted on the first support. A connecting rod is connected to the end of the telescopic assembly away from the first support. The end of the connecting rod is used to connect to the towing cable trolley via a traction rope. The second bracket is also mounted on the first bracket and located below the telescopic assembly. The end of the second bracket near the connecting rod is provided with a detection unit, which is used to detect the axial displacement of the telescopic assembly. The transmission component is connected at one end to the detection unit and at the other end to the impeller feeder body; When the axial displacement of the telescopic component exceeds the threshold of the detection unit, the transmission component transmits a signal to the impeller feeder body to stop the impeller feeder body and protect the drag cable.

2. The impeller feeder cable protection device according to claim 1, characterized in that, The telescopic component includes: The inner cylinder is mounted on the first support. The telescopic unit is connected to the inner cylinder and coincides with the axial direction of the inner cylinder; The outer cylinder is fixedly connected to the end of the telescopic unit and is located outside the inner cylinder; Among them, under the action of the telescopic unit, the outer cylinder can move closer to or further away from the inner cylinder; The sensing block is mounted on the outer cylinder and located above the detection unit, parallel to the axis of the detection unit.

3. The impeller feeder cable protection device according to claim 2, characterized in that, The telescopic unit is a cylindrical spring or a conical spring.

4. The impeller feeder cable protection device according to claim 2, characterized in that, Also includes: The dustproof component is connected at one end to the outside of the inner cylinder and at the other end to the outside of the outer cylinder.

5. The impeller feeder cable protection device according to claim 4, characterized in that, The dustproof component is tied between the outer side of the inner cylinder and the outer side of the outer cylinder.

6. The impeller feeder cable protection device according to claim 5, characterized in that, The dustproof component is a dustproof cover.

7. The impeller feeder cable protection device according to claim 1, characterized in that, The detection unit is a proximity switch.

8. The impeller feeder cable protection device according to claim 1, characterized in that, The first support and the second support are axially parallel.

9. A cable protection device for an impeller feeder according to claim 1, characterized in that, The transmission element is a signal line.

10. A cable protection device for an impeller feeder according to claim 1, characterized in that, The second support has an L-shaped structure.

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