Pressure relief mechanism of pulverized coal system valve

Abstract

The utility model relates to the technical field of pulverized coal system valves, and discloses a pressure relief mechanism of a pulverized coal system valve, which comprises a coal conveying pipe and a mechanical pressure relief valve, the bottom of the mechanical pressure relief valve is provided with a feed port, the feed port is fixedly connected to one side of the top of the coal conveying pipe, the middle of the mechanical pressure relief valve is provided with a pressure relief port, and the pressure relief port is fixedly connected to one side of the top of the coal conveying pipe. A circulating pipe is fixedly connected to the interior of the pressure relief opening, an anti-blocking assembly is arranged in the circulating pipe, and a secondary pressure relief assembly is installed on the other side of the top of the coal conveying pipe; the secondary pressure relief assembly comprises a main valve cylinder and a secondary valve cylinder, and one end of the secondary valve cylinder is obliquely installed on the side wall of the main valve cylinder. According to the multi-stage pressure relief device, firstly, the mechanical pressure relief valve is used for quickly reducing the pressure, and then the secondary pressure relief valve is used for stably releasing the pressure, so that the system safety is improved. The pressure relief opening is connected with the circulating pipe to recycle pulverized coal, loss is reduced, blockage is prevented through the ultrasonic vibration rod, pipeline smoothness is guaranteed, and the energy utilization efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coal powder system valve technical field especially relates to a coal powder system valve's pressure relief mechanism. BACKGROUND

[0002] The coal powder system valve is a key component for controlling the coal powder conveying and flowing, mainly used for adjusting, cutting off or relieving the gas-solid mixture in the coal powder pipeline. Its functions include controlling the coal powder conveying flow, preventing pipeline blockage, maintaining system pressure stability and relieving pressure protection under overpressure or abnormal conditions. The coal powder system valve is usually installed in the coal powder conveying pipeline of the boiler combustion system, such as the outlet of the coal mill, the inlet of the coal powder distributor, the front end of the burner, and the key nodes that need to be adjusted or protected pressure, to ensure the safe and stable operation of the coal powder combustion system.

[0003] The traditional pressure relief valve usually uses a single valve to release pressure. When facing a larger pressure fluctuation working condition, it often appears that the pressure is released too fast or insufficient, affecting the stability of the system. In addition, single-stage pressure relief design is easy to cause pressure impact, increase pipeline wear and tear, and reduce equipment service life. In terms of coal recovery, the coal debris escaped during the pressure relief process is often difficult to recover and utilize, causing resource waste. At the same time, the coal powder particles inside the pipeline are easy to deposit, with high risk of blockage, affecting the conveying efficiency and increasing the maintenance cost.

[0004] In view of the above problems, a pressure relief mechanism for a coal powder system valve is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] In order to make up for the above shortcomings, the utility model provides a pressure relief mechanism for a coal powder system valve, aiming at solving the problems of uneven pressure release, low coal powder recovery rate during pressure relief process and easy blockage of pipeline of the existing pressure relief mechanism for a coal powder system valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a pressure relief mechanism for a coal powder system valve, comprising a coal conveying pipe and a mechanical pressure relief valve, the bottom of the mechanical pressure relief valve is provided with a feed inlet, the feed inlet is fixedly connected to one side of the top of the coal conveying pipe, the middle of the mechanical pressure relief valve is provided with a pressure relief port, the inside of the pressure relief port is fixedly connected with a circulating pipe, the inside of the circulating pipe is provided with an anti-blocking assembly, the other side of the top of the coal conveying pipe is installed with a secondary pressure relief assembly;

[0007] The secondary pressure relief assembly includes a main valve cylinder and a secondary valve cylinder, with one end of the secondary valve cylinder obliquely mounted on the side wall of the main valve cylinder. A main sealing plug is slidably connected inside the main valve cylinder, and a main control rod is fixedly connected to the top of the main sealing plug. A secondary sealing plug is slidably connected inside the secondary valve cylinder, and a secondary control rod is fixedly connected to the top of the secondary sealing plug. The main valve cylinder and the secondary valve cylinder are connected by a conduit.

[0008] As a further description of the above technical solution:

[0009] Both the main valve cylinder and the secondary valve cylinder have sealing blocks on their inner top sides, and both the main control rod and the secondary control rod are slidably connected inside the sealing blocks.

[0010] As a further description of the above technical solution:

[0011] The secondary valve cylinder has two vent ports on its side wall.

[0012] As a further description of the above technical solution:

[0013] The main valve cylinder is installed obliquely on the side wall of the coal conveying pipe, and the side wall of the secondary valve cylinder abuts against the circulation pipe.

[0014] As a further description of the above technical solution:

[0015] The secondary valve cylinder and the circulation pipe are connected through two vent ports.

[0016] As a further description of the above technical solution:

[0017] An adjusting wrench is rotatably connected to the top of the mechanical pressure relief valve, and the adjusting wrench is connected to the valve disc inside the mechanical pressure relief valve via a connecting rod.

[0018] As a further description of the above technical solution:

[0019] The anti-blocking component includes an ultrasonic generator, and an ultrasonic vibration rod is installed inside the ultrasonic generator.

[0020] As a further description of the above technical solution:

[0021] The ultrasonic generator is fixedly connected inside the side wall of the circulation tube.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, a multi-stage pressure relief device is installed at the top of the coal conveying pipeline. First, a mechanical pressure relief valve is used to initially relieve pressure inside the pipeline, quickly releasing high pressure to prevent system overpressure. Subsequently, two interconnected secondary pressure relief valves are used for gradual pressure relief, making the pressure release process more stable. This design can effectively cope with dynamic changes in pipeline pressure, avoiding the impact of a single pressure relief valve handling all pressure fluctuations, and improving the accuracy of pressure relief and system safety.

[0024] 2. In this utility model, to improve the utilization rate of coal resources, a circulation pipe is installed at the pressure relief port of the pressure relief valve and connected to a secondary pressure relief valve to collect and recover coal dust scattered due to pressure relief, reduce coal powder loss, and improve energy utilization efficiency. Simultaneously, to prevent coal dust from accumulating or clogging in the circulation pipe, an ultrasonic vibration rod is installed on the side wall of the pipe. Ultrasonic vibration is used to reduce the aggregation and adhesion of coal particles, improving the smoothness of the pipe. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a pressure relief mechanism for a pulverized coal system valve proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the conduit of the pressure relief mechanism of a pulverized coal system valve proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the ultrasonic generator for the pressure relief mechanism of a pulverized coal system valve proposed in this utility model.

[0028] Legend:

[0029] 1. Coal conveying pipe; 2. Mechanical pressure relief valve; 21. Feed inlet; 22. Pressure relief port; 23. Adjusting wrench; 3. Circulation pipe; 4. Secondary pressure relief assembly; 401. Main valve cylinder; 402. Secondary valve cylinder; 403. Main control rod; 404. Main sealing plug; 405. Conduit; 406. Secondary sealing plug; 407. Secondary control rod; 408. Vent port; 5. Anti-clogging assembly; 501. Ultrasonic generator; 502. Ultrasonic vibration rod. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 - Figure 3This utility model provides an embodiment of a pressure relief mechanism for a pulverized coal system valve, comprising a coal conveying pipe 1 and a mechanical pressure relief valve 2. The bottom of the mechanical pressure relief valve 2 is provided with an inlet 21 for connection to the coal conveying pipe 1, allowing pulverized coal to smoothly enter the pressure relief channel during conveying. An adjusting wrench 23 is rotatably connected to the top of the mechanical pressure relief valve 2. The adjusting wrench 23 is connected to the valve disc inside the mechanical pressure relief valve 2 via a connecting rod, allowing the opening degree of the valve disc to be changed by adjusting the adjusting wrench 23, thereby regulating the pressure relief flow rate to adapt to pressure requirements under different operating conditions. The inlet 21 is fixedly connected to one side of the top of the coal conveying pipe 1 and directly communicates with the inside of the pipe, allowing pulverized coal to smoothly enter the pressure relief system. The mechanical pressure relief valve 2 has a pressure relief port 22 in the middle, used to release the high-pressure coal powder gas flow inside the coal conveying pipe 1. A circulation pipe 3 is fixedly connected inside the pressure relief port 22. The circulation pipe 3 is designed to recover the escaped coal powder, reducing resource waste and minimizing coal powder pollution to the external environment. An anti-clogging component 5 is installed inside the circulation pipe 3 to prevent coal powder particles from accumulating and clogging during circulation, improving the long-term operational stability of the system. A secondary pressure relief component 4 is installed on the other side of the top of the coal conveying pipe 1. This secondary pressure relief component 4 consists of two interconnected valves, used in conjunction with the mechanical pressure relief valve 2. After the first stage of pressure relief, it further releases the remaining pressure, ensuring that the pressure inside the pipeline gradually decreases and preventing pipeline impact or coal powder backflow caused by instantaneous pressure release.

[0032] Reference Figure 1 - Figure 2 The secondary pressure relief assembly 4 includes a main valve cylinder 401 and a secondary valve cylinder 402. The main valve cylinder 401 is installed at an angle on the side wall of the coal conveying pipe 1 to accommodate possible pressure direction changes during pulverized coal conveying. One end of the secondary valve cylinder 402 is installed at an angle on the side wall of the main valve cylinder 401, allowing it to further regulate pressure after the main valve cylinder 401 completes initial pressure relief, forming a multi-stage pressure relief mode and avoiding pressure shocks caused by single pressure relief. The side wall of the secondary valve cylinder 402 abuts against the circulation pipe 3, realizing the recovery and reuse of the pressure relief airflow, reducing energy consumption and improving the system's economy. The side wall of the secondary valve cylinder 402 has two vent ports 408, which are connected to the circulation pipe 3, allowing the gas discharged during the pressure relief process to smoothly enter the circulation system, preventing gas accumulation in the pipeline that could cause blockage or system instability.

[0033] The main valve cylinder 401 has a main sealing plug 404 slidably connected inside. This plug keeps the pipeline sealed under normal conditions, only opening when a set pressure is reached to release excess pressure. A main control rod 403 is fixedly connected to the top of the main sealing plug 404. This control rod is used to adjust the travel of the main sealing plug 404, thereby precisely controlling the pressure relief and ensuring the stability of pressure release. The secondary valve cylinder 402 has a secondary sealing plug 406 slidably connected inside, working in conjunction with the main sealing plug 404. After the main sealing plug 404 opens, it further relieves pressure according to changes in pressure. A secondary control rod 407 is fixedly connected to the top of the secondary sealing plug 406. By adjusting the travel of the secondary control rod 407, precise control of the secondary pressure relief valve can be achieved, ensuring a smooth pressure relief process.

[0034] Furthermore, the main valve cylinder 401 and the secondary valve cylinder 402 are connected by a conduit 405, enabling the two-stage pressure relief components to work in coordination and ensuring the continuity and stability of the pressure relief process. To enhance sealing performance, sealing blocks are provided on the inner top of both the main valve cylinder 401 and the secondary valve cylinder 402, ensuring that the system maintains a good sealing effect in the non-pressure relief state and preventing coal powder leakage or airflow disturbance from affecting the internal stability of the coal conveying pipe 1.

[0035] Reference Figure 3 The anti-blocking component 5 includes an ultrasonic generator 501, which is fixedly connected to the inside of the side wall of the circulation pipe 3. An ultrasonic vibration rod 502 is installed inside the ultrasonic generator 501. The ultrasonic vibration rod 502 acts directly on the coal powder medium inside the circulation pipe 3. The high-frequency micro-vibration enhances the fluidity of the coal powder, keeping the particles loose during the conveying process and preventing them from agglomerating.

[0036] Working principle: When the internal pressure of the coal conveying pipe 1 increases, the pulverized coal gas flow enters the mechanical pressure relief valve 2 through the feed inlet 21 and flows to the pressure relief port 22 through the opening of the valve disc. During this process, the adjusting wrench 23 controls the valve disc inside the mechanical pressure relief valve 2 through the connecting rod, so that its opening degree is adapted to the pressure magnitude, ensuring smooth pressure relief. After the pulverized coal gas flow passes through the pressure relief port 22, part of it is guided into the circulation pipe 3 for recycling, while the remaining gas flow continues to flow to the other side of the coal conveying pipe 1 and enters the secondary pressure relief assembly 4. In the secondary pressure relief assembly 4, the gas flow first enters the main valve cylinder 401, pushing the main sealing plug 404 to slide upward, thereby driving the main control rod 403, so that the main valve cylinder 401 and the secondary valve cylinder 402 are connected through the conduit 405. At this point, some of the pulverized coal airflow enters the secondary valve cylinder 402, pushing the secondary sealing plug 406 upwards, which in turn drives the secondary control rod 407 to move, allowing the pulverized coal airflow to enter the circulation pipe 3 through the two vents 408 on the side wall of the secondary valve cylinder 402. Inside the circulation pipe 3, the ultrasonic generator 501 is activated, driving the ultrasonic vibration rod 502 to generate high-frequency vibrations that act on the inner wall of the pipe, thereby reducing the risk of pulverized coal adhesion and blockage, ensuring that the pulverized coal remains uniformly dispersed during flow, and finally enters the recovery system, completing the entire depressurization and pulverized coal recovery process.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure relief mechanism for a pulverized coal system valve, comprising a coal conveying pipe (1) and a mechanical pressure relief valve (2), characterized in that: The mechanical pressure relief valve (2) has an inlet (21) at its bottom, which is fixedly connected to the top side of the coal conveying pipe (1). The mechanical pressure relief valve (2) has a pressure relief port (22) in the middle, and a circulation pipe (3) is fixedly connected inside the pressure relief port (22). An anti-blocking component (5) is installed inside the circulation pipe (3). A secondary pressure relief component (4) is installed on the other side of the top of the coal conveying pipe (1). The secondary pressure relief assembly (4) includes a main valve cylinder (401) and a secondary valve cylinder (402), with one end of the secondary valve cylinder (402) obliquely mounted on the side wall of the main valve cylinder (401). A main sealing plug (404) is slidably connected inside the main valve cylinder (401), and a main control rod (403) is fixedly connected to the top of the main sealing plug (404). A secondary sealing plug (406) is slidably connected inside the secondary valve cylinder (402), and a secondary control rod (407) is fixedly connected to the top of the secondary sealing plug (406). The main valve cylinder (401) and the secondary valve cylinder (402) are connected by a conduit (405).

2. The pressure relief mechanism of a pulverized coal system valve according to claim 1, characterized in that: The main valve cylinder (401) and the secondary valve cylinder (402) are both provided with sealing blocks on their inner top sides, and the main control rod (403) and the secondary control rod (407) are both slidably connected inside the sealing blocks.

3. The pressure relief mechanism of a pulverized coal system valve according to claim 1, characterized in that: The secondary valve cylinder (402) has two vent ports (408) on its side wall.

4. The pressure relief mechanism of a pulverized coal system valve according to claim 1, characterized in that: The main valve cylinder (401) is installed obliquely on the side wall of the coal conveying pipe (1), and the side wall of the secondary valve cylinder (402) abuts against the circulation pipe (3).

5. The pressure relief mechanism of a pulverized coal system valve according to claim 3, characterized in that: The secondary valve cylinder (402) and the circulation pipe (3) are connected by two vent ports (408).

6. The pressure relief mechanism of a pulverized coal system valve according to claim 1, characterized in that: The top of the mechanical pressure relief valve (2) is rotatably connected to an adjusting wrench (23), and the adjusting wrench (23) is connected to the valve disc inside the mechanical pressure relief valve (2) via a connecting rod.

7. The pressure relief mechanism of a pulverized coal system valve according to claim 1, characterized in that: The anti-blocking component (5) includes an ultrasonic generator (501), and an ultrasonic vibration rod (502) is installed inside the ultrasonic generator (501).

8. The pressure relief mechanism of a pulverized coal system valve according to claim 7, characterized in that: The ultrasonic generator (501) is fixedly connected to the inside of the side wall of the circulation tube (3).

Images