Protective sealing device for pulverized coal production

Abstract

The utility model discloses a protective sealing device for pulverized coal production, which comprises a flour mill body, a discharge pipe and a machine body input pipe, the discharge pipe is mounted at the bottom of the flour mill body, the machine body input pipe is arranged at the top of the flour mill body, a sealed feeding device is mounted at the top of the machine body input pipe, and the sealed feeding device comprises a horizontal conveying pipe. A discharging square pipe is welded to the bottom of the material conveying pipe and connected with the machine body input pipe, a feeding square pipe is welded to the top of the material conveying pipe, the discharging square pipe and the feeding square pipe are not located on the same vertical line, a feeding hopper is welded to the top of the feeding square pipe, a sealed material pushing device is installed in the material conveying pipe, an air cylinder is fixedly installed at the right end of the material conveying pipe, and an output shaft is fixed to the right end of the sealed material pushing device. A vent hole is formed in the left end of the conveying pipe. Blanking of coal briquettes can be controlled without manual work, one position of the blanking square pipe and one position of the feeding square pipe are kept to be communicated with the interior of the conveying pipe, the other position of the blanking square pipe and the other position of the feeding square pipe are kept to be closed, sealing performance during blanking is guaranteed, and excessive dust in the flour mill body is prevented from flying out of the feeding square pipe during feeding.

Description

Technical Field

[0001] This utility model relates to the technical field of coal powder sealing devices, and in particular to a protective sealing device for coal powder production. Background Technology

[0002] In pulverized coal production, pulverized coal sealing is a very important technology in industrial production processes involving pulverized coal (such as thermal power generation and coal chemical industry). It is mainly used to prevent pulverized coal leakage. Leaked pulverized coal will pollute the surrounding air, and the tiny particles it contains (PM10, PM2.5, etc.) will have a negative impact on air quality, which is detrimental to the environment and the health of workers.

[0003] Utility model patent CN219647591U discloses a protective sealing device for pulverized coal production, specifically relating to the field of sealing device technology. The device includes a housing with a discharge pipe on one side and an input pipe on the top, with a protective mechanism at the top of the input pipe. This utility model, by incorporating the protective mechanism, allows the device to block and seal the input pipe during pulverized coal production. This sealing prevents pulverized coal from escaping from the input pipe during production, thus avoiding environmental pollution. However, the protective mechanism uses a cover plate and screw for sealing. When feeding material, the screw needs to be manually rotated to separate the cover plate from the input pipe, resulting in low feeding efficiency. Furthermore, when the cover plate is opened for feeding, pulverized coal inside the housing can escape from the input pipe, making it inconvenient to use. Utility Model Content

[0004] The purpose of this utility model is to provide a protective sealing device for powder production, which solves the problems in the prior art where the cover plate needs to be opened manually to feed materials, and where coal powder floats out from the feed port during feeding.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A protective sealing device for pulverized coal production includes a grinding mill body, a discharge pipe, and a machine body inlet pipe. The discharge pipe is installed at the bottom of the grinding mill body, and the machine body inlet pipe is installed at the top. A sealing feeding device is installed at the top of the machine body inlet pipe. The sealing feeding device includes a conveying pipe, a discharge square pipe, a feed square pipe, a feeding hopper, a sealing pushing device, a cylinder, and a vent. The conveying pipe is horizontal, and the discharge square pipe is welded to the bottom and connected to the machine body inlet pipe. The feed square pipe is welded to the top. The discharge square pipe and the feed square pipe are not on the same vertical line. The feeding hopper is welded to the top of the feed square pipe. A sealing pushing device is installed inside the conveying pipe. The cylinder is fixedly installed at the right end of the conveying pipe, and the output shaft is fixed to the right end of the sealing pushing device. A vent is opened at the left end of the conveying pipe.

[0007] Preferably, the inner diameters of the discharge square tube and the feed square tube are equal, denoted as d1, and the minimum horizontal distance between the discharge square tube and the feed square tube is denoted as d2, where d2 > d1.

[0008] Preferably, the sealing and pushing device includes a pushing device A, which includes a first pushing block A, a second pushing block A, a sealing ring A, and a spring. The first pushing block A and the second pushing block A have the same structure and are slidably connected inside the conveying pipe by the sealing ring A sleeved on the outside. The right end of the first pushing block A is fixed to the cylinder output shaft, and the left end of the second pushing block A is fixed to the spring. The left end of the spring is fixed to the left inner wall of the conveying pipe. The lengths of the first pushing block A and the second pushing block A are greater than d1 plus d2, and the first pushing block A and the second pushing block A are located on both sides of the inner wall of the feed square tube.

[0009] Preferably, the sealing and pushing device includes a pushing device B, which includes a first pushing block B, a second pushing block B, a sealing ring B, a connecting block B, and a storage groove B. The first pushing block B and the second pushing block B have the same structure and are slidably connected along the inside of the conveying pipe by the sealing ring B sleeved on the outside. The right end of the first pushing block B is fixed to the cylinder output shaft. A connecting block B is fixed between the first pushing block B and the second pushing block B. A storage groove B is opened inside the connecting block B. The inner diameter of the storage groove B is equal to d1. The lengths of the first pushing block B and the second pushing block B are respectively greater than d1 plus d2.

[0010] Preferably, there are two feed square tubes, one on the left and one on the right, which are symmetrical to the feed square tubes, and the feeding hopper is connected to the two feed square tubes.

[0011] Preferably, the sealing and pushing device includes a pushing device C, which includes a first pushing block C, a second pushing block C, a sealing ring C, a connecting block C, and a storage square groove C. The first pushing block C and the second pushing block C have the same structure and are slidably connected along the inside of the conveying pipe by the sealing ring C sleeved on the outside. The right end of the first pushing block C is fixed to the cylinder output shaft. A connecting block C is fixed between the first pushing block C and the second pushing block C. The connecting block C has two storage square grooves C on the left and right sides. The inner diameter of the two storage square grooves C is equal to d1, and the minimum distance between the two storage square grooves C is the same as d2. The lengths of the first pushing block C and the second pushing block C are respectively greater than d1 plus d2.

[0012] Preferably, a support column is fixed between the bottom surface of the feed pipe and the grinding mill body.

[0013] Preferably, the feeding square tube and the machine body input tube are connected by a sealing flange.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] The sealed pusher device uses a cylinder to push coal blocks into the grinding mill at regular intervals for grinding. Compared with manual control, it is more effective and allows for better control of the feeding timing. Moreover, the feeding square tube and the infeed square tube are not on the same vertical line. The cylinder pushes the sealed pusher device horizontally, causing the coal blocks in the feed square tube to fall into the conveying pipe. After moving horizontally, they fall out of the feeding square tube. Throughout the process, the feeding square tube and the infeed square tube are kept connected to the inside of the conveying pipe at one end and closed at the other end, ensuring the sealing during feeding and preventing excessive dust from floating out of the infeed square tube from the grinding mill during feeding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0017] Figure 2 This is a longitudinal sectional view of the sealing feeding device according to Embodiment 1 of this utility model;

[0018] Figure 3 This is a longitudinal sectional view of the feeding device A in Embodiment 1 of this utility model, located in the feeding pipe;

[0019] Figure 4 This is a longitudinal sectional view of the feeding device B in Embodiment 2 of this utility model, located in the feeding pipe;

[0020] Figure 5 This is a schematic diagram of the structure of the feeding device B in Embodiment 2 of this utility model;

[0021] Figure 6 This is a longitudinal sectional view of the feeding device C in embodiment 3 of this utility model, located in the feeding pipe;

[0022] Figure 7 This is a schematic diagram of the structure of the feeding device C in Embodiment 3 of this utility model;

[0023] Icons: 1. Grinding mill body; 2. Discharge pipe; 3. Machine body feed pipe; 4. Sealed feeding device; 41. Conveying pipe; 42. Discharge square pipe; 43. Feed square pipe; 44. Feed hopper; 45. Sealed pushing device; 451. Pushing device A; 4511. First pusher block A; 4512. Second pusher block A; 4513. Sealing ring A; 4514. Spring; 452. Pushing device B; 4521. First push block B; 4522, Second push block B; 4523, Sealing ring B; 4524, Connecting block B; 4525, Material storage trough B; 453, Pushing device C; 4531, First push block C; 4532, Second push block C; 4533, Sealing ring C; 4534, Connecting block C; 4535, Material storage trough C; 46, Cylinder; 47, Vent hole; 48, Support column; 49, Connecting flange. Detailed Implementation

[0024] To make the objectives, methods, and advantages of the embodiments of this utility model clearer, the method solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, 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.

[0025] Example 1

[0026] like Figure 1-3 As shown, a protective sealing device for pulverized coal production includes a grinding mill body 1, a discharge pipe 2, and a machine body inlet pipe 3. The grinding mill body 1 is used for grinding and screening pulverized coal. The discharge pipe 2 for screened pulverized coal is installed at the bottom, and the machine body inlet pipe 3 for feeding coal blocks is installed at the top. A sealing feeding device 4 for sealing and discharging coal blocks is installed at the top of the machine body inlet pipe 3. The sealing feeding device 4 includes a conveying pipe 41, a discharge square pipe 42, a feed square pipe 43, a feeding hopper 44, a sealing pushing device 45, a cylinder 46, and a vent 47. The conveying pipe 41 is horizontal, and the discharge square pipe 42 is welded to the bottom and connected to the machine body inlet pipe 3. The feed square pipe 43 is welded to the top. The discharge square pipe 42 and the feed square pipe 43 are not on the same vertical line. To prevent coal dust from floating out of the mill body 1 when coal is fed in, a feeding hopper 44 is welded to the top of the feeding square tube 43 for convenient storage of coal. A sealing pusher device 45 is installed inside the conveying pipe 41. The cylinder 46 is fixedly installed on the right end of the conveying pipe 41, and the output shaft is fixed to the right end of the sealing pusher device 45. When the material falls into the sealing pusher device 45, the cylinder 46 pushes the sealing pusher device 45 horizontally, causing the coal falling into the conveying pipe 41 from the feeding square tube 43 to fall out from the discharge square tube 42 after horizontal movement, ensuring the sealing during material discharge. A vent hole 47 is opened at the left end of the conveying pipe 41 to prevent excessive internal pressure at the left end of the conveying pipe 41 during the movement of the sealing pusher device 45, which would affect the movement of the sealing pusher device 45.

[0027] Specifically, the inner diameters of the discharge square tube 42 and the feed square tube 43 are equal, denoted as d1, and the minimum horizontal distance between them is d2, where d2 > d1. This avoids partial overlap between the discharge square tube 42 and the feed square tube 43 in the vertical direction, thus enhancing the sealing effect during material discharge.

[0028] Specifically, the sealing and pushing device 45 is structured as a pushing device A451, which includes a first pushing block A4511, a second pushing block A4512, a sealing ring A4513, and a spring 4514. The first pushing block A4511 and the second pushing block A4512 have the same structure and are slidably connected within the conveying pipe 41 via the outer sleeved sealing ring A4513. The right end of the first pushing block A4511 is fixed to the output shaft of the cylinder 46, and the left end of the second pushing block A4512 is fixed to the spring 4514. The left end of the spring 4514 is fixed to the inner left wall of the conveying pipe 41. Push block A4512 applies a horizontal pushing force to the right. The lengths of the first push block A4511 and the second push block A4512 are greater than d1 plus d2, respectively. When the first push block A4511 is pushed, it ensures that the feeding square tube 42 and the feeding square tube 43 are connected to the inside of the conveying pipe 41 at one end and closed at the other end. After the cylinder 46 is retracted and the spring is in its natural state, the first push block A4511 and the second push block A4512 are located on both sides of the inner wall of the feeding square tube 43. This prevents the coal block from falling from the feeding square tube 43 into the conveying pipe 41. If the distance is too large, it will affect the sealing effect, and if the distance is too small, it will cause a reduction in the feeding.

[0029] In use, the first pusher block A4511 is initially positioned on the right side of the inner wall of the feed square tube 43. It is pushed by the output shaft of the cylinder 46, which moves the coal block between the first pusher block A4511 and the second pusher block A4512. The spring 4514 is compressed, and the feed square tube 43 is connected to the conveying pipe 41. The upper part of the discharge square tube 42 is blocked and closed by the second pusher block A4512, so that the discharge square tube 42 is connected to the conveying pipe 41, and the lower part of the feed square tube 43 is blocked and closed by the first pusher block A4511. This causes the coal block to move horizontally to the discharge square tube 42 and fall into the grinding mill body 1. The output shaft of the cylinder 46 retracts, which drives the first pusher block A4511 back to its initial position. The second pusher block A4512 is restored to the left side of the inner wall of the feed square tube 43 by the elastic force of the spring 4514 for the next feeding.

[0030] A support column 48 is fixed between the bottom surface of the feed pipe 41 and the grinding mill body 1 to increase the stability of the feed pipe 41.

[0031] The feeding square tube 42 and the machine body input tube 3 are connected by a sealing flange. This ensures that the connection is sealed and prevents coal powder from escaping.

[0032] Example 2

[0033] Because the spring 4514 easily causes the first pusher block A4511 to generate inertia when it resets, in order to keep the distance between the first pusher block A4511 and the second pusher block A4512 always equal, and to ensure that the amount of coal falling between the first pusher block A4511 and the second pusher block A4512 remains consistent, such as... Figure 4-5As shown, in this embodiment, the sealing and pushing device 45 has another structure, namely a pushing device B452. The pushing device B452 includes a first pushing block B4521, a second pushing block B4522, a sealing ring B4523, a connecting block B4524, and a storage square groove B4525. The first pushing block B4521 and the second pushing block B4522 have the same structure and are slidably connected along the inside of the conveying pipe 41 by the sealing ring B4523 sleeved on the outside. The right end of the first pushing block B4521 is fixed to the output shaft of the cylinder 46. The first pushing block B4522... A connecting block B4524 is fixed between the first push block B4521 and the second push block B4522 to fix them together, so that the cylinder can drive the first push block B4521 and the second push block B4522 to move synchronously. The connecting block B4524 has a material storage groove B4525 inside. The inner diameter of the material storage groove B4525 is equal to d1, which ensures that the coal blocks in the feed tube 43 fall smoothly into the material storage groove B4525. The lengths of the first push block B4521 and the second push block B4522 are greater than d1 plus d2, respectively, to ensure that the discharge tube 42 and the feed tube 43 are connected to the inside of the conveying pipe 41 at one point and closed at the other point.

[0034] In the specific implementation process, after the output shaft of cylinder 46 retracts, the feed square tube 43 and the storage square trough B4525 are connected vertically. The upper part of the discharge square tube 42 is blocked and closed by the second push block B4522. When the output shaft of cylinder 46 pushes, the first push block B4521 and the second push block B4522 simultaneously drive the coal block in the storage square trough B4525 to move, so that the storage square trough B4525 is connected vertically with the discharge square tube 42. At this time, the lower part of the feed square tube 43 is blocked and closed by the first push block B4521, so that the coal block falls into the grinding mill body 1, completing the feeding process. After the output shaft of cylinder 46 retracts and returns to the initial position, the next feeding is carried out.

[0035] Example 3

[0036] In order to enable the output shaft of cylinder 6 to complete one feeding cycle each when it pushes and retracts, thereby reducing the number of times cylinder 6 performs its work, such as... Figure 6-7 As shown, in this embodiment, there are two feed square tubes 43, one on the left and one on the right, which are symmetrically located on the left and right sides of the discharge square tube 42, and the feeding hopper 44 is connected to the two feed square tubes 43.

[0037] The sealing and pushing device 45 also has another structure, which is a pushing device C453. The pushing device C453 includes a first pushing block C4531, a second pushing block C4532, a sealing ring C4533, a connecting block C4534, and a storage square groove C4535. The first pushing block C4531 and the second pushing block C4532 have the same structure and are slidably connected along the inside of the conveying pipe 41 by the sealing ring C4533 sleeved on the outside. The right end of the first pushing block C4531 is fixed to the output shaft of the cylinder 46. A connecting block C4534 is fixed between the first pushing block C4531 and the second pushing block C4532. The connecting block C4534 has two storage square grooves C4535 on the left and right. The inner diameter of the two storage square grooves C4535 is equal to d1, and the minimum distance between the two storage square grooves C4535 is the same as d2. The lengths of the first pushing block C4531 and the second pushing block C4532 are respectively greater than d1 plus d2.

[0038] In the specific implementation process, the coal blocks in the right storage trough C4535 fall into the right feed tube 43. At this time, the top opening of the discharge tube 42 is connected to the left storage trough C4535. It is blocked by the second push block C4532 and the connecting block C4534 and is in a sealed state. The output shaft of the cylinder 46 pushes the first push block C4531, and the right storage trough C4535 moves to the top of the discharge tube 42, so that the coal blocks fall into the grinding mill body 1. At this time, the left storage trough C4535 moves to the bottom of the left feed tube 43, and the coal blocks fall from the left feed tube 43 into the left storage trough C4535. After the output shaft of the cylinder 46 retracts, the left storage trough C4535 moves to the top of the discharge tube 42, so that the coal blocks fall into the grinding mill body 1. The pushing and retracting of the output shaft of the cylinder 46 can complete one feeding.

[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 protective sealing device for coal dust production, comprising a pulverizer body (1), a discharge pipe (2), and a body feeding pipe (3), wherein the discharge pipe (2) is installed at the bottom of the pulverizer body (1), and the body feeding pipe (3) is arranged at the top of the pulverizer body (1), characterized in that, The top of the machine body feeding pipe (3) is provided with a sealed feeding device (4), The sealed feeding device (4) comprises a feeding pipe (41), a discharging square pipe (42), a feeding square pipe (43), a feeding hopper (44), a sealed pushing device (45), a gas cylinder (46) and a vent hole (47). The feeding pipe (41) is horizontal, and the bottom is welded with the discharging square pipe (42) connected with the machine body feeding pipe (3), and the top is welded with the feeding square pipe (43). The discharging square pipe (42) and the feeding square pipe (43) are not on the same vertical line. The top of the feeding square pipe (43) is welded with the feeding hopper (44). The sealed pushing device (45) is installed inside the feeding pipe (41). The gas cylinder (46) is fixedly installed at the right end of the feeding pipe (41), and the output shaft is fixedly connected with the right end of the sealed pushing device (45). The left end of the feeding pipe (41) is provided with the vent hole (47).

2. The protective sealing device for coal powder production according to claim 1, characterized in that, The inner diameters of the discharging square pipe (42) and the feeding square pipe (43) are equal to d1, and the minimum horizontal distance of the discharging square pipe (42) and the feeding square pipe (43) is d2, and d2>d1.

3. The protective sealing device for coal dust production according to any one of claims 1-2, characterized in that, The sealed pushing device (45) comprises a pushing device A (451). The pushing device A (451) comprises a first pushing block A (4511), a second pushing block A (4512), a sealing ring A (4513) and a spring (4514). The first pushing block A (4511) and the second pushing block A (4512) are the same structure, and are respectively connected with the feeding pipe (41) through the sealing ring A (4513) sleeved on the outside. The right end of the first pushing block A (4511) is fixedly connected with the output shaft of the gas cylinder (46). The left end of the second pushing block A (4512) is fixedly connected with the spring (4514). The left end of the spring (4514) is fixedly connected with the left inner wall of the feeding pipe (41). The lengths of the first pushing block A (4511) and the second pushing block A (4512) are greater than d1 plus d2 respectively. The first pushing block A (4511) and the second pushing block A (4512) are located on the two sides of the inner wall of the feeding square pipe (43).

4. The protective sealing device for coal dust production according to any one of claims 1-2, characterized in that, The sealed pushing device (45) comprises a pushing device B (452). The pushing device B (452) comprises a first pushing block B (4521), a second pushing block B (4522), a sealing ring B (4523), a connecting block B (4524) and a storage square groove B (4525). The first pushing block B (4521) and the second pushing block B (4522) are the same structure, and are connected with the feeding pipe (41) through the sealing ring B (4523) sleeved on the outside. The right end of the first pushing block B (4521) is fixedly connected with the output shaft of the gas cylinder (46). The connecting block B (4524) is fixedly connected between the first pushing block B (4521) and the second pushing block B (4522). The connecting block B (4524) is internally provided with the storage square groove B (4525). The inner diameter of the storage square groove B (4525) is equal to d1. The lengths of the first pushing block B (4521) and the second pushing block B (4522) are greater than d1 plus d2 respectively.

5. The protective sealing device for coal dust production according to claim 2, characterized in that, The feeding square tubes (43) are two, and are located in the left and right symmetry of the discharging square tube (42), and the feeding hopper (44) is communicated with the two feeding square tubes (43).

6. The protective sealing device for coal dust production according to claim 5, characterized in that, The sealing pushing device (45) comprises a pushing device C (453), which comprises a first pushing block C (4531), a second pushing block C (4532), a sealing ring C (4533), a connecting block C (4534) and a storage square groove C (4535). The first pushing block C (4531) and the second pushing block C (4532) are the same in structure, are connected through the sealing ring C (4533) on the outer side, slide along the inside of the conveying pipe (41), the right end of the first pushing block C (4531) is fixed with the output shaft of the air cylinder (46), the connecting block C (4534) is fixed between the first pushing block C (4531) and the second pushing block C (4532), the left and right storage square grooves C (4535) are formed on the connecting block C (4534), the inner diameter of the two storage square grooves C (4535) is equal to d1, the minimum distance of the two storage square grooves C (4535) is equal to d2, and the lengths of the first pushing block C (4531) and the second pushing block C (4532) are greater than d1+d2 respectively.

7. The protective sealing device for coal dust production of claim 1, wherein, The bottom surface of the conveying pipe (41) is fixed with the supporting column (48) between the mill body (1).

8. The protective sealing device for coal dust production of claim 1, wherein, The discharging square tube (42) and the machine body feeding pipe (3) are connected through the sealing flange.

Images