A gas lock for a coal pulverizing system of a coal-fired boiler

Abstract

The application discloses a kind of air lockers of coal powder boiler pulverizing system, including a receiving cavity, a guide channel is arranged on receiving cavity, a lock valve is arranged in the receiving cavity corresponding to guide channel, a connecting rod is arranged below lock valve, the connecting rod is extended to outside receiving cavity, a counterweight hammer is arranged at the outermost side of connecting rod, a buffer spring is arranged below counterweight hammer, the other side of buffer spring is connected with the outer wall of receiving cavity.This application is cooperatively arranged with counterweight hammer and buffer spring, when air locker operates, with lock valve moving downward, spring lengthens, tension increases.Avoid the action moment of weight decreases in the process of lock valve moving downward in traditional structure, so that the coal powder of system moves and falls faster, when lock valve restores sealing, realize the reliable sealing of lock valve under the double action of spring force and weight moment.

Description

Technical Field

[0001] This application relates to an airlock device for a pulverized coal boiler pulverizing system. Background Technology

[0002] As a key component in the pulverizing system, the traditional airlock structure often suffers from poor sealing during use, leading to reduced operating efficiency of the pulverizing system and consequently reduced boiler efficiency.

[0003] The main reason for the airlock's poor sealing is the improper position of the counterweight. The distance between the counterweight and the balance support is too small, resulting in insufficient torque provided by the counterweight, which cannot meet the requirements for reliable sealing.

[0004] The reason for the small distance between the counterweight and the balance support is that when the counterweight is far away, during the process of restoring the sealing position when the airlock is activated, the torque balance in the powder drop pipe is broken, resulting in a large impact force at the balance support position, which causes the connection between the balance bar and the balance support to break. Utility Model Content

[0005] To address the aforementioned problems, this application proposes an airlock device for a pulverized coal boiler pulverizing system. The device includes a receiving cavity with an inlet channel. An airlock valve is installed within the receiving cavity corresponding to the inlet channel. A connecting rod extends below the airlock valve, extending out of the receiving cavity. A counterweight is positioned on the outermost side of the connecting rod, and a buffer spring is positioned below the counterweight. The other side of the buffer spring is connected to the outer wall of the receiving cavity. This application employs a combination of a counterweight and a buffer spring. When the airlock device actuates, the spring stretches as the airlock valve moves downward, increasing the tension. This avoids the problem in traditional structures where the torque of the counterweight decreases during the downward movement of the airlock valve, thus preventing the pulverized coal from falling more rapidly. When the airlock valve returns to a sealed position, reliable sealing is achieved under the combined action of the spring force and the counterweight torque.

[0006] Preferably, the connecting rod includes a vertical push rod connected to the bottom of the airlock valve. A V-shaped crank arm is provided on the side of the vertical push rod away from the airlock valve. The side of the V-shaped crank arm away from the vertical push rod extends out of the receiving cavity. A lateral support is provided on the side of the receiving cavity, and a hinge bearing is provided on the lateral support. The V-shaped crank arm is fixedly connected to the outer side of the hinge bearing. A transverse support rod is provided on the side of the V-shaped crank arm away from the lateral support. The counterweight is sleeved on the transverse support rod. A sleeve is provided on the V-shaped crank arm corresponding to the position of the vertical push rod. The vertical push rod is inserted into the sleeve, and at least one locking screw passes between the vertical push rod and the sleeve. This application uses a vertical push rod, a V-shaped crank arm, and a transverse support rod to connect the weight of the airlock valve to the counterweight, making the opening or closing operation smoother and more stable.

[0007] Preferably, the end of the transverse support rod is provided with a threaded connection section, the counterweight is sleeved on the threaded connection section, and locking nuts are provided on both sides of the counterweight corresponding to both sides of the threaded connection section.

[0008] Preferably, the bottom of the counterweight is provided with a first hook-in hole, and one side of the buffer spring is inserted into the first hook-in hole; a powder-falling pipe is provided at the bottom of the receiving cavity, and a powder-falling pipe clamp is provided on the outside of the powder-falling pipe. A second hook-in hole is provided on the outside of the powder-falling pipe clamp, and the other side of the buffer spring relative to the counterweight is hooked into the outside of the powder-falling pipe clamp in the second hook-in hole. This application, by providing a buffer spring, can provide cushioning, avoiding the repeated rebound caused by the impact force when the traditional airlock structure returns to the sealed position, thus preventing continuous impact force at the support and preventing breakage at the support.

[0009] Preferably, the airlock valve is shaped like a hemispherical or frustum conical surface, with the opening facing the orientation of the valve.

[0010] Preferably, the airlock door is in the shape of a flat panel door.

[0011] Preferably, the weight of the counterweight is G, the distance from the center of the counterweight to the center of the hinge bearing is L1, the value range of the control coefficient c is [0.2, 0.5], and the spring length of the balance spring is L2;

[0012] The spring constant of a balance spring is k = c * G * L1 / L2.

[0013] This application can bring the following beneficial effects:

[0014] 1. This application employs a combination of a counterweight and a buffer spring. When the airlock is activated, the spring stretches and the pulling force increases as the airlock valve moves downward. This avoids the situation in traditional structures where the torque of the counterweight decreases during the downward movement of the airlock valve, thus preventing the coal dust from falling more rapidly. When the airlock valve returns to a sealed position, a reliable seal is achieved under the combined action of the spring force and the counterweight torque.

[0015] 2. This application uses a combination of a vertical push rod, a V-shaped crank arm, and a horizontal support rod to connect the weight of the airlock valve to the counterweight, making the opening or closing operation smoother and more stable.

[0016] 3. By setting a buffer spring, this application can provide cushioning and avoid the traditional airlock structure from rebounding multiple times due to the impact force when restoring the sealed position, thus causing continuous impact force at the support and preventing the support from breaking. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this application.

[0019] Figure 2 This is a schematic diagram of the connecting rod section. Detailed Implementation

[0020] To clearly illustrate the technical features of this solution, the following detailed description, in conjunction with the accompanying drawings, will be provided.

[0021] In the first embodiment, such as Figure 1 As shown, an airlock device for a pulverized coal boiler pulverizing system includes a receiving cavity 1, an inlet channel 2 on the receiving cavity 1, an airlock valve 3 inside the receiving cavity 1 corresponding to the inlet channel 2, a connecting rod 4 below the airlock valve 3 extending outside the receiving cavity 1, a counterweight 5 on the outermost side of the connecting rod 4, and a buffer spring 6 below the counterweight 5. The other side of the buffer spring 6 is connected to the outer wall of the receiving cavity 1.

[0022] In use, the material first accumulates from the top of the airlock valve 3. After accumulating to a certain mass, the airlock valve 3 is pushed downward to open, and then the connecting rod 4 is pushed to move. When the connecting rod 4 is pushed downward, the counterweight 5 moves upward and pulls the buffer spring 6. The buffer spring 6 also generates tension. After the material is discharged, the counterweight 5 moves downward, driving the connecting rod 4 to close the airlock valve 3 and enter the next cycle.

[0023] In the second embodiment, as Figure 1-2 As shown, an airlock device for a pulverized coal boiler pulverizing system includes a receiving cavity 1, an inlet channel 2 on the receiving cavity 1, an airlock valve 3 inside the receiving cavity 1 corresponding to the inlet channel 2, a connecting rod 4 below the airlock valve 3 extending outside the receiving cavity 1, a counterweight 5 on the outermost side of the connecting rod 4, and a buffer spring 6 below the counterweight 5. The other side of the buffer spring 6 is connected to the outer wall of the receiving cavity 1.

[0024] The connecting rod 4 includes a vertical push rod 7 connected to the bottom of the airlock valve 3. A V-shaped crank arm 8 is provided on the side of the vertical push rod 7 away from the airlock valve 3. The side of the V-shaped crank arm 8 away from the vertical push rod 7 extends out of the receiving cavity 1. A lateral support 9 is provided on the side of the receiving cavity 1, and a hinge bearing 10 is provided on the lateral support 9. The V-shaped crank arm 8 is fixedly connected to the outer side of the hinge bearing 10. A transverse support rod 11 is provided on the side of the V-shaped crank arm 8 away from the lateral support 9. The counterweight 5 is sleeved on the transverse support rod 11. A sleeve is provided at the position of the V-shaped crank arm corresponding to the vertical push rod. The vertical push rod is inserted into the sleeve. At least one locking screw passes between the vertical push rod and the sleeve. The end of the transverse support rod 11 is provided with a threaded connection section. The counterweight 5 is sleeved on the threaded connection section. Locking nuts 12 are provided on both sides of the counterweight 5 corresponding to both sides of the threaded connection section. The bottom of the counterweight 5 is provided with a first hooking hole 13, and one side of the buffer spring 6 is inserted into the first hooking hole 13; a powder discharge pipe 14 is provided at the bottom of the receiving cavity 1, and a powder discharge pipe clamp 15 is provided on the outside of the powder discharge pipe 14. A second hooking hole 16 is provided on the outside of the powder discharge pipe clamp 15, and the other side of the buffer spring 6 relative to the counterweight 5 is hooked to the outside of the powder discharge pipe clamp 15 in the second hooking hole 16.

[0025] The airlock valve 3 is shaped like a hemispherical or frustum conical surface, with its opening facing the orientation. Alternatively, the airlock valve 3 can also be a flat surface, i.e., a flat door. The weight of the counterweight is G, the distance from the center of the counterweight to the center of the hinge bearing 10 is L1, the control coefficient c ranges from [0.2, 0.5], and the length of the balance spring is L2, i.e., 0.2 ≤ c ≤ 0.5; the spring constant k = c * G * L1 / L2.

[0026] In use, the material first accumulates from the top of the airlock valve 3. After accumulating to a certain mass, the airlock valve 3 is pushed downward to open, and then the vertical push rod 7 is pushed. The vertical push rod 7 drives the V-shaped crank arm 8. The V-shaped crank arm 8 drives the horizontal support rod 11 to move relative to the hinge bearing 10. The horizontal support rod 11 drives the counterweight 5 to move upward, pulling the buffer spring 6. The buffer spring 6 also generates tension. After the material is discharged, the counterweight 5 moves downward, driving the connecting rod 4, so that the airlock valve 3 is closed, and the next cycle begins.

[0027] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An airlock for a pulverized coal boiler pulverizing system, characterized in that: It includes a receiving cavity, an inlet channel is provided on the receiving cavity, an airlock valve is provided in the receiving cavity corresponding to the inlet channel, a connecting rod is provided below the airlock valve, the connecting rod extends out of the receiving cavity, a counterweight is provided on the outermost side of the connecting rod, a buffer spring is provided below the counterweight, and the other side of the buffer spring is connected to the outer wall of the receiving cavity.

2. The airlock device for a pulverized coal boiler pulverizing system as described in claim 1, characterized in that: The connecting rod includes a vertical push rod connected to the bottom of the airlock valve. A V-shaped crank arm is provided on the side of the vertical push rod away from the airlock valve. The side of the V-shaped crank arm away from the vertical push rod extends out of the receiving cavity. A lateral support is provided on the side of the receiving cavity. A hinge bearing is provided on the lateral support. The V-shaped crank arm is fixedly connected to the outer side of the hinge bearing. A transverse support rod is provided on the side of the V-shaped crank arm away from the lateral support. The counterweight is sleeved on the transverse support rod. A sleeve is provided at the position of the V-shaped crank arm corresponding to the vertical push rod. The vertical push rod is inserted into the sleeve. At least one locking screw passes between the vertical push rod and the sleeve.

3. The airlock device for a pulverized coal boiler pulverizing system as described in claim 2, characterized in that: The end of the transverse support rod is provided with a threaded connection section, the counterweight is sleeved on the threaded connection section, and locking nuts are provided on both sides of the counterweight corresponding to the two sides of the threaded connection section.

4. The airlock device for a pulverized coal boiler pulverizing system as described in claim 2, characterized in that: The bottom of the counterweight is provided with a first hooking hole, and one side of the buffer spring is inserted into the first hooking hole; a powder discharge pipe is provided at the bottom of the receiving cavity, and a powder discharge pipe clamp is provided on the outside of the powder discharge pipe. A second hooking hole is provided on the outside of the powder discharge pipe clamp, and the other side of the buffer spring relative to the counterweight is hooked to the outside of the powder discharge pipe clamp in the second hooking hole.

5. The airlock device for a pulverized coal boiler pulverizing system as described in claim 1, characterized in that: The airlock valve is shaped like a hemispherical or frustum conical surface, with its opening facing the orientation of the valve.

6. The airlock device for a pulverized coal boiler pulverizing system as described in claim 1, characterized in that: The airlock door is shaped like a flat panel door.

7. The airlock device for a pulverized coal boiler pulverizing system as described in claim 2, characterized in that: The weight of the hammer is G, the distance from the center of the hammer to the center of the hinge bearing is L1, the range of the control coefficient c is [0.2, 0.5], and the length of the balance spring is L2. The spring constant of the balance spring is k = c * G * L1 / L2.

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