Center coal dropping pipe of bucket wheel machine of coal conveying system

Abstract

The utility model provides a bucket wheel machine center coal dropping pipe of a coal conveying system, a discharge port of a coal conveyor is communicated with an inlet of the coal dropping pipe, the inlet of the coal dropping pipe is communicated with two obliquely-closed diversion material pipes, a discharge port at the lower end of each diversion material pipe is provided with a buffer discharge port, and a conveying belt is arranged at the lower end of each buffer discharge port. A supporting rack of the conveying belt is arranged on the base through a plurality of springs, a valve plate is further arranged on the upper portion of the distributing material pipe, a first hydraulic cylinder is arranged on one side of the valve plate, the output end of the first hydraulic cylinder is connected with the valve plate, and a cylinder body of the first hydraulic cylinder is connected with the surface of the distributing material pipe. The design innovation of the coal conveying system shows remarkable beneficial effects in the aspects of improving the working efficiency, enhancing the system stability, promoting automatic monitoring, optimizing maintenance management, supporting energy conservation and emission reduction and the like, and a more efficient, safer and sustainable material treatment solution is provided for industries depending on coal conveying, such as thermal power plants.

Description

Technical Field

[0001] The utility model relates to the field of coal conveying systems, in particular to a central coal dropping pipe of a bucket wheel machine of a coal conveying system. Background Art

[0002] In the current context of thermal power plant operations, coal is the main fuel, and its efficient and continuous supply is crucial to ensuring power generation efficiency.

[0003] In the traditional coal conveying system, especially in the design and application of the central coal drop pipe of the bucket wheel excavator, there is a long-standing technical challenge: when the coal blocks fall from a higher position to the conveyor belt, a significant vibration effect will be generated. This vibration not only directly acts on the conveyor belt, causing a strong impact, but also affects the entire supporting structure, leading to many adverse consequences. Due to the lack of effective shock-absorbing and buffering measures, the huge kinetic energy generated by the free fall of large pieces of coal hitting the conveyor belt will cause premature fatigue of the conveyor belt material, especially the joints and the covering layer are easy to be damaged, which seriously shortens the service life of the conveyor belt and increases the frequency and cost of maintenance and replacement. Utility Model Content

[0004] The main purpose of the utility model is to provide a central coal drop pipe of a bucket wheel machine in a coal conveying system, which solves the problem that when coal blocks fall from a higher position to a conveyor belt, a significant vibration effect will be generated. This vibration not only directly acts on the conveyor belt, causing a strong impact, but also affects the entire supporting structure, leading to multiple adverse consequences.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a central coal dropping pipe of a bucket wheel excavator in a coal conveying system, the coal conveyor discharge port is connected with the coal dropping pipe inlet, the coal dropping pipe inlet is connected with two inclined and closed diversion pipes, the discharge port at the lower end of the diversion pipe is provided with a buffer discharge port, and a conveyor belt is provided at the lower end of the buffer discharge port. The supporting frame of the conveyor belt is arranged on the base through a plurality of springs, and a valve plate is also provided at the upper position of the diversion pipe, and a first hydraulic cylinder is provided on one side of the valve plate, the output end of the first hydraulic cylinder is connected with the valve plate, and the cylinder body of the first hydraulic cylinder is connected with the surface of the diversion pipe.

[0006] In the preferred embodiment, first guide pins are provided on the support frames on both sides of the conveyor belt, second guide pins are provided on the base at positions corresponding to the first guide pins, and both ends of the spring are sleeved on the first guide pins and the second guide pins.

[0007] In a preferred embodiment, the conveyor belt is a V-shaped conveyor belt.

[0008] In the preferred embodiment, the buffer discharge port is made of rubber material, and the discharge port at the lower end of the buffer discharge port is parallel to the cross section of the conveyor belt.

[0009] In a preferred embodiment, the upper end of the buffer discharge port is snap-fitted to the outlet of the diverter pipe or connected via a plurality of screws.

[0010] In the preferred embodiment, a crushing port is further provided on the diverter pipe, a hydraulic breaker is provided on one side of the crushing port, a second hydraulic cylinder is provided on both sides of the hydraulic breaker, the output end of the second hydraulic cylinder is connected to the hydraulic breaker, and the cylinder body of the second hydraulic cylinder is provided on the surface of the diverter pipe;

[0011] The second hydraulic cylinder drives the hydraulic breaker to pass through the crushing opening to crush the coal blocks inside the diversion pipe.

[0012] In a preferred embodiment, at least one observation port is provided on the diversion pipe, and the observation port is arranged near the hydraulic breaker.

[0013] The utility model provides a central coal dropping pipe of a bucket wheel machine in a coal conveying system, which effectively concentrates materials through a V-shaped conveyor belt design to reduce scattering and blockage, combines the rubber material of a buffer discharge port to reduce impact, and an intelligent hydraulic crushing device to instantly crush large pieces of coal, thereby ensuring smooth transmission of coal and improving the processing efficiency and continuous operation capacity of the entire system.

[0014] The spring-supported belt design absorbs vibrations, reduces wear and tear, and extends the life of the belt and support structure. At the same time, the hydraulically driven breaker only works when needed, reducing unnecessary mechanical wear.

[0015] The design innovation of this coal transportation system has demonstrated significant beneficial effects in improving work efficiency, enhancing system stability, promoting automated monitoring, optimizing maintenance management, and supporting energy conservation and emission reduction. It provides a more efficient, safe and sustainable material handling solution for industries that rely on coal transportation, such as thermal power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 This is the overall layout and installation structure diagram of the utility model;

[0018] Figure 2 This is a structural diagram of the installation position of the hydraulic breaker pick of the utility model;

[0019] Figure 3 This is a structural diagram of the conveyor belt installation of the utility model.

[0020] In the figure: coal drop pipe inlet 1; valve plate 2; first hydraulic cylinder 3; diverter pipe 4; crushing port 401; observation port 402; second hydraulic cylinder 5; hydraulic breaker 6; buffer discharge port 7; conveyor belt 8; support frame 9; first guide pin 901; spring 10; base 11; second guide pin 1101. DETAILED DESCRIPTION

[0021] like Figures 1 to 3 As shown, a central coal dropping pipe of a bucket wheel excavator in a coal conveying system, the coal conveyor discharge port is connected with the coal dropping pipe inlet 1, the coal dropping pipe inlet 1 is connected with two inclined closed diverter pipes 4, the discharge port at the lower end of the diverter pipe 4 is provided with a buffer discharge port 7, the lower end of the buffer discharge port 7 is provided with a conveyor belt 8, the supporting frame 9 of the conveyor belt 8 is arranged on a base 11 through a plurality of springs 10, a valve plate 2 is further provided at the upper position of the diverter pipe 4, a first hydraulic cylinder 3 is provided on one side of the valve plate 2, the output end of the first hydraulic cylinder 3 is connected with the valve plate 2, and the cylinder body of the first hydraulic cylinder 3 is connected with the surface of the diverter pipe 4.

[0022] The coal blocks at the coal conveyor outlet are transported to the coal drop pipe inlet 1, which is divided into two branch pipes 4 and transported to the corresponding conveyor belt 8. The conveyor belt 8 is buffered by a spring 10, which increases the service life of the conveyor belt 8.

[0023] The system starts at the discharge port of the coal conveyor, and the material then enters the coal drop pipe inlet 1, which is designed to smoothly transition into two inclined and closed diversion pipes 4. This layout not only ensures the reasonable distribution of material flow, but also facilitates subsequent precise control.

[0024] A buffer outlet 7 is specially provided at the lower end of each diversion pipe 4 to reduce the impact force of the material when it falls and protect the subsequent conveying link. The conveyor belt 8 is directly connected below the buffer outlet to form an efficient and low-loss material transfer channel.

[0025] The support frame 9 of the conveyor belt 8 is creatively installed on the base 11 through multiple springs 10. This design uses the elastic characteristics of the springs to absorb the vibrations generated during the operation, greatly improving the service life and smoothness of the conveyor belt.

[0026] An adjustable valve plate 2 is provided on the upper part of the flow dividing pipe 4, which is connected to the first hydraulic cylinder 3. The output end of the hydraulic cylinder is tightly connected to the valve plate, and the cylinder body is fixed to the outer wall of the flow dividing pipe. This design enables the valve plate to be flexibly opened and closed through the control of the hydraulic system, thereby realizing instant adjustment of the material flow direction, and enhancing the flexibility and response speed of the system.

[0027] In the preferred embodiment, the support frames 9 on both sides of the conveyor belt 8 are provided with first guide pins 901, the base 11 is provided with second guide pins 1101 at positions corresponding to the first guide pins 901, and both ends of the spring 10 are sleeved on the first guide pins 901 and the second guide pins 1101. The two ends of the spring 10 are sleeved on the first guide pins 901 and the second guide pins 1101, fixing the position of the spring 10, and the conveyor belt 8 is buffered by the spring 10, thereby increasing the service life of the conveyor belt 8.

[0028] The first guide pins 901 are added to the support frames 9 on both sides of the conveyor belt, and the second guide pins 1101 are set at the corresponding positions of the base 11. Such a design ensures the position accuracy and stability of the spring 10 during installation, avoids unnecessary deviation or slippage of the spring during operation, and lays a solid foundation for the subsequent buffering function.

[0029] By respectively sleeved the two ends of the spring 10 on the first guide pin 901 and the second guide pin 1101, not only the position of the spring is fixed, but also the elastic potential energy of the spring is fully utilized to absorb the impact force caused by the falling of the material during the conveying process. This design enables the conveyor belt to effectively disperse and consume energy through the compression-rebound process of the spring when it is impacted by the falling coal block, significantly reducing the vibration directly transmitted to the conveyor belt and the supporting structure, and effectively preventing the damage of the conveyor belt and the instability of the system caused by vibration.

[0030] Through the above design, the vibration of the conveyor belt 8 during operation is significantly buffered, reducing mechanical fatigue and wear under long-term operation, directly improving the service life of the conveyor belt, while also reducing maintenance costs and improving the reliability and economy of the entire coal transportation system.

[0031] In the preferred embodiment, the conveyor belt 8 is a V-shaped conveyor belt. Due to its unique cross-sectional shape, the V-shaped conveyor belt can naturally guide the materials falling thereon to gather toward the center.

[0032] In the preferred embodiment, the buffer outlet 7 is made of rubber material, and the outlet at the lower end of the buffer outlet 7 is parallel to the cross section of the conveyor belt 8. The rubber material itself has good elasticity and shock absorption performance. When the coal block or other materials hit the buffer outlet 7 at the corner and fall, the rubber can absorb most of the impact energy, greatly reducing the falling impact sound and vibration, thereby protecting the conveyor belt 8 from direct impact damage, while reducing the noise level of the entire system and improving the working environment.

[0033] The rubber material also has good wear resistance. Even in the case of long-term contact with hard materials such as coal, it can maintain good shape and function, extending the service life of the discharge port and reducing maintenance costs and replacement frequency.

[0034] In a preferred embodiment, the upper end of the buffer outlet 7 is snap-fitted to the outlet of the diverter pipe 4 or connected via a plurality of screws.

[0035] In the preferred embodiment, a breaking port 401 is further provided on the diverting material pipe 4, a hydraulic breaker 6 is provided on one side of the breaking port 401, and a second hydraulic cylinder 5 is provided on both sides of the hydraulic breaker 6, the output end of the second hydraulic cylinder 5 is connected to the hydraulic breaker 6, and the cylinder body of the second hydraulic cylinder 5 is arranged on the surface of the diverting material pipe 4;

[0036] The second hydraulic cylinder 5 drives the hydraulic breaker 6 to pass through the crushing opening 401 to crush the coal blocks in the diversion pipe 4. When a large coal block or a coal block blocks the diversion pipe 4, the second hydraulic cylinder 5 drives the hydraulic breaker 6 to pass through the crushing opening 401 to crush the coal blocks in the diversion pipe 4.

[0037] The additional crushing opening 401 inside the diverter pipe 4 is a key design point, which provides an intervention point for the crushing equipment. The hydraulic breaker 6 installed beside the crushing opening is a powerful crushing tool that can intervene when needed to effectively handle oversized or blocked coal blocks.

[0038] The second hydraulic cylinder 5 disposed on both sides of the hydraulic breaker 6 constitutes the core of the drive system. The second hydraulic cylinder is connected to the breaker through its output end, and the cylinder body is fixed to the surface of the diverter pipe 4, ensuring the stability of the crushing operation and the directness of the force transmission.

[0039] When there is a large coal block or coal blockage, the second hydraulic cylinder 5 is controlled to drive the hydraulic breaker 6 to penetrate the crushing opening 401 to crush the coal blocks that hinder the flow of materials. This dynamic response mechanism effectively avoids the interruption of transportation caused by blockage and maintains the continuous and efficient operation of the coal transportation system.

[0040] This integrated crushing mechanism not only solves the problem of large pieces of material being difficult to move downward, but also reduces the impact on the subsequent conveyor belt 8 and other equipment, improving the working efficiency and stability of the entire system. At the same time, it also reduces the need for manual intervention and improves the degree of automation and safety.

[0041] In the preferred embodiment, at least one observation port 402 is provided on the diverter pipe 4, and the observation port 402 is arranged near the hydraulic breaker 6. The observation port 402 is used to observe whether the inside of the diverter pipe 4 is blocked. At least one observation port 402 is provided, and its position is carefully arranged near the hydraulic breaker 6. The purpose of such a design is to facilitate the operator or the monitoring system to directly visually check the internal conditions of the diverter pipe 4, especially the material flow conditions near the crushing area and potential blockage points.

[0042] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A central coal drop pipe of a bucket wheel machine in a coal conveying system, characterized by: The coal conveyor discharge port is connected to the coal drop pipe inlet (1), and the coal drop pipe inlet (1) is connected to two inclined closed diverter pipes (4). The discharge port at the lower end of the diverter pipe (4) is provided with a buffer discharge port (7), and a conveyor belt (8) is provided at the lower end of the buffer discharge port (7). The support frame (9) of the conveyor belt (8) is arranged on a base (11) through a plurality of springs (10). A valve plate (2) is also provided at the upper part of the diverter pipe (4), and a first hydraulic cylinder (3) is provided on one side of the valve plate (2). The output end of the first hydraulic cylinder (3) is connected to the valve plate (2), and the cylinder body of the first hydraulic cylinder (3) is connected to the surface of the diverter pipe (4).

2. According to claim 1, the central coal drop pipe of the bucket wheel excavator of the coal conveying system is characterized by: A first guide pin (901) is provided on the support frames (9) on both sides of the conveyor belt (8), a second guide pin (1101) is provided on the base (11) at a position corresponding to the first guide pin (901), and two ends of the spring (10) are sleeved on the first guide pin (901) and the second guide pin (1101).

3. According to claim 1, the central coal drop pipe of the bucket wheel excavator of the coal conveying system is characterized by: The conveyor belt (8) is a V-shaped conveyor belt.

4. According to claim 1, the central coal drop pipe of the bucket wheel excavator of the coal conveying system is characterized by: The buffer discharge port (7) is made of rubber material, and the discharge port at the lower end of the buffer discharge port (7) is parallel to the cross section of the conveyor belt (8).

5. According to claim 4, the central coal drop pipe of the bucket wheel excavator of the coal conveying system is characterized by: The upper end of the buffer discharge port (7) is snap-fitted to the outlet of the diverter pipe (4) or connected via a plurality of screws.

6. The central coal drop pipe of a bucket wheel excavator in a coal conveying system according to claim 1, characterized in that: The diverting pipe (4) is also provided with a crushing opening (401), a hydraulic breaker (6) is provided on one side of the crushing opening (401), second hydraulic cylinders (5) are provided on both sides of the hydraulic breaker (6), an output end of the second hydraulic cylinder (5) is connected to the hydraulic breaker (6), and a cylinder body of the second hydraulic cylinder (5) is arranged on the surface of the diverting pipe (4); The second hydraulic cylinder (5) drives the hydraulic breaker (6) to pass through the crushing opening (401) to crush the coal blocks inside the diversion pipe (4).

7. The central coal drop pipe of a bucket wheel excavator in a coal conveying system according to claim 6, characterized in that: At least one observation port (402) is provided on the diversion pipe (4), and the observation port (402) is arranged close to the hydraulic breaker (6).

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