Sealing structure for preventing powder leakage

Abstract

The utility model discloses a sealing structure for preventing powder leakage, which belongs to the technical field of sealing structures and comprises a first pipeline and a second pipeline, a first flange plate is fixed at the right end of the first pipeline, and a second flange plate is fixedly connected at the left end of the second pipeline. The first flange plate and the second flange plate are connected through a plurality of bolts. According to the sealing structure for preventing powder leakage, a first pipeline and a second pipeline are in butt joint through a first flange plate and a second flange plate and are fixed through a plurality of bolts, meanwhile, a positioning block on a first protection ring is inserted into a positioning groove in a second protection ring, the positioning block extrudes an air storage bag, and then the air storage bag releases air; and released gas is conveyed to the sealing air bag through the gas conveying pipe, so that the sealing air bag expands and can fill the groove at the moment, and therefore the sealing performance of the connecting position of the first flange plate and the second flange plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, in particular to a sealing structure for preventing powder leakage. Background Art

[0002] During the transportation process, powder is usually transported through pipes, and the connection between pipes requires a sealing structure to prevent powder from leaking out from the gap between the two pipes;

[0003] For example, the mechanical seal structure for conveying powder particles with the announcement number "CN217634552U" can well ensure the sealing of the pipeline opening, the structural installation is stable, and the strength of the sealing can be ensured. At the same time, through the setting of the screw and other structures, the size of the sealing gap can be adjusted to meet the needs of pipeline leakage, which can not only play a stable sealing role, but also meet the adjustment needs. In addition, the utility model can also meet the needs of mechanical sealing connection between multiple pipelines, which is very beneficial for the maintenance and sealing of pipelines;

[0004] Another example is a sealing structure for conveying a heat preservation brick powder material pipeline with a publication number of "CN212718555U". The two pipelines can be connected by a connector, and the sealing of the connection is ensured to prevent external dust from entering the interior and causing material contamination. In addition, the two pipelines can be separated by rotating the pipeline body and pulling it outwards. The installation and disassembly are relatively convenient. When the material is transported, the angle and direction of the pipeline can be adjusted by bending the connecting pipe, which is convenient for the transportation of the material.

[0005] When the above mechanism is in use, the two pipes can be connected through a connector and the sealing of the connection can be ensured to prevent external dust from entering the interior and causing material contamination. However, only a single layer of sealing through the connector makes the sealing effect poor, resulting in powder leakage from the gap between the two pipes during the powder transportation process.

[0006] Therefore, we proposed a sealing structure to prevent powder leakage, which can solve the above problems well. Utility Model Content

[0007] The utility model aims to provide a sealing structure for preventing powder leakage, so as to solve the problem proposed in the above-mentioned background technology that only a single-layer sealing through a connecting piece makes the sealing effect poor, resulting in the powder leaking out from the gap between the two pipe connection positions during the powder conveying process.

[0008] To achieve the above object, the utility model provides the following technical solution: a sealing structure for preventing powder leakage, comprising a first pipe and a second pipe, wherein a first flange is fixed to the right end of the first pipe, and a second flange is fixed to the left end of the second pipe, and the first flange and the second flange are connected by a plurality of bolts;

[0009] A sealing structure for preventing powder leakage, further comprising:

[0010] A first protective ring is fixedly sleeved on the outer side of the right end of the first pipe, a second protective ring is fixedly sleeved on the outer side of the left end of the second pipe, and a positioning block is installed on the right side of the first protective ring;

[0011] A positioning groove is provided on the left side of the second protective ring, and an air storage bag is arranged on the right side of the inner wall of the positioning groove. A sealing air bag is embedded and installed on the left side of the second flange. A sealing groove is provided on the right side of the first flange. The sealing air bag is fixedly connected to the air pipe through the air pipe.

[0012] Preferably, the four positioning blocks are distributed at equal angles on the right side of the first protective ring, and the positions of the positioning blocks and the positioning grooves correspond one to one, and the positioning blocks and the positioning grooves are snap-fitted.

[0013] Preferably, the air storage bags are bonded to the inner wall of the positioning groove, and the four air storage bags are connected to the sealing air bag through an air pipe.

[0014] Preferably, one-way valves are installed inside the four gas pipes.

[0015] Preferably, the inner wall of the first pipe is hinged with movable plates at equal angles, and a guide ring is provided on the right side inside the first pipe, and the guide ring is connected to the four movable plates via a connecting plate, and a fixing ring is fixedly connected to the inner side of the second flange, and a sealing ring is provided on the left side of the fixing ring.

[0016] Preferably, both ends of the connecting plate are hingedly connected to the side surface of the movable plate and the left side of the guide ring respectively.

[0017] Preferably, vortex springs are installed at the connection positions between the axial ends of the four movable plates and the first pipe, and the positions of the guide ring and the fixed ring correspond to each other.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the sealing structure for preventing powder leakage adopts a new structural design, and its specific contents are as follows:

[0019] (1) The first pipeline and the second pipeline are butted together through the first flange and the second flange, and fixed by a plurality of bolts. At the same time, the positioning block on the first protective ring is inserted into the positioning groove on the second protective ring, and the positioning block squeezes the air storage bag. Then the air storage bag releases gas, and the released gas is transported to the sealing air bag through the air pipe, so that the sealing air bag expands. At this time, the sealing air bag can fill the groove, thereby improving the sealing performance of the connection position of the first flange and the second flange;

[0020] Furthermore, by providing a one-way valve, the gas in the air storage bag can only enter the sealed air bag from the air delivery pipe, thereby preventing the gas from turbulent flow;

[0021] Furthermore, the first protection ring and the second protection ring are combined together to form a sealed space, thereby protecting the outside of the connection position between the first pipeline and the second pipeline;

[0022] (2) When dust is transported from the first pipe to the second pipe, the movable plate will impact and rotate, causing the connecting plate to rotate and push the guide ring to move toward the fixed ring, so that the guide ring is always close to the fixed ring, thereby protecting the inner wall of the connection position between the first pipe and the second pipe to avoid poor sealing due to wear;

[0023] Furthermore, when the movable plate is no longer impacted, it can be rotated and reset under the stored force of the vortex spring, and the connecting plate can be used to drive the guide ring to reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the guide ring and the fixing ring of the utility model;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the first guard ring and the second guard ring of the utility model;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the second flange of the utility model;

[0028] Figure 5 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0029] Figure 6 This is a schematic diagram of the rotating structure of the movable plate of the utility model.

[0030] In the figure: 1. first pipeline; 2. second pipeline; 3. first flange; 4. second flange; 5. sealing airbag; 6. sealing groove; 7. first protective ring; 8. second protective ring; 9. positioning block; 10. positioning groove; 11. air storage bag; 12. air delivery pipe; 13. movable plate; 14. connecting plate; 15. guide ring; 16. fixing ring; 17. one-way valve; 18. vortex spring; 19. sealing ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1-Figure 6 , the utility model provides the following technical solutions: a sealing structure for preventing powder leakage;

[0033] Embodiment 1: In order to solve the problem that the sealing effect is poor in the prior art due to the single-layer sealing of the connecting piece, which causes the powder to leak out from the gap between the two pipes during the powder transportation process, the following solution is disclosed. Figure 1 and Figure 3-Figure 6 As shown, it includes a first pipeline 1 and a second pipeline 2, a first flange 3 is fixed to the right end of the first pipeline 1, a second flange 4 is fixed to the left end of the second pipeline 2, and the first flange 3 and the second flange 4 are connected by a plurality of bolts;

[0034] It also includes: a first protective ring 7 is fixedly sleeved on the outer side of the right end of the first pipe 1, a second protective ring 8 is fixedly sleeved on the outer side of the left end of the second pipe 2, and a positioning block 9 is installed on the right side of the first protective ring 7; a positioning groove 10 is opened on the left side of the second protective ring 8, four positioning blocks 9 are distributed at equal angles on the right side of the first protective ring 7, and the positions of the positioning blocks 9 and the positioning grooves 10 correspond one to one, and the positioning blocks 9 and the positioning grooves 10 are snap-fitted, and an air storage bag 11 is arranged on the right side of the inner wall of the positioning groove 10, a sealing air bag 5 is embedded and installed on the left side of the second flange 4, a sealing groove 6 is opened on the right side of the first flange 3, and the sealing air bag 5 is fixedly connected to the air pipe 12 through the air pipe 12;

[0035] The first pipeline 1 and the second pipeline 2 are connected by the first flange 3 and the second flange 4, and fixed by multiple bolts. At the same time, the positioning block 9 on the first protective ring 7 is inserted into the positioning groove 10 on the second protective ring 8, and the positioning block 9 squeezes the air storage bag 11. Then the air storage bag 11 releases gas and transmits the released gas to the sealing air bag 5 through the air pipe 12, so that the sealing air bag 5 expands. At this time, the sealing air bag 5 can fill the sealing groove 6, thereby improving the sealing of the connection position of the first pipeline 1 and the second pipeline 2, and the first protective ring 7 and the second protective ring 8 are combined together to form a sealed space, so as to protect the outside of the connection position of the first pipeline 1 and the second pipeline 2, so that the double-layer sealing of the first protective ring 7 and the second protective ring 8 and the sealing air bag 5 can improve the sealing effect of the connection position of the first pipeline 1 and the second pipeline 2 to prevent powder leakage.

[0036] Embodiment 2: Different from Embodiment 1, this embodiment uses the one-way valve 17 to prevent gas turbulence. Figure 3 and Figure 5 As shown, the air storage bag 11 is bonded to the inner wall of the positioning groove 10, and the four air storage bags 11 are connected to the sealing air bag 5 through the air supply pipe 12, and the inside of the four air supply pipes 12 is equipped with a one-way valve 17;

[0037] By setting the one-way valve 17, the gas in the air storage bag 11 can only enter the sealing air bag 5 from the air supply pipe 12, while the gas in the sealing air bag 5 cannot enter the air storage bag 11 from the air supply pipe 12, thereby preventing the gas from turbulent flow.

[0038] Embodiment 3: Different from Embodiment 2, in this embodiment, the guide ring 15 and the fixing ring 16 are tightly fitted together, so that the inner wall of the connection position between the first pipe 1 and the second pipe 2 can be protected to avoid poor sealing due to wear. For details, refer to Figure 1 , Figure 2 and Figure 6 As shown, the inner wall of the first pipe 1 is hinged with a movable plate 13 at an equal angle, and a guide ring 15 is arranged on the right side inside the first pipe 1, and the guide ring 15 is connected to the four movable plates 13 through a connecting plate 14, and the two ends of the connecting plate 14 are respectively hingedly connected to the side of the movable plate 13 and the left side of the guide ring 15, a fixing ring 16 is fixedly connected to the inner side of the second flange 4, and a sealing ring 19 is arranged on the left side of the fixing ring 16, and the connection positions of the axial ends of the four movable plates 13 and the first pipe 1 are all installed with vortex springs 18, and the positions of the guide ring 15 and the fixing ring 16 correspond to each other;

[0039] When dust is transported from the first pipe 1 to the second pipe 2, the movable plate 13 will be impacted and rotated, causing the connecting plate 14 to rotate and push the guide ring 15 to move in the direction of the fixed ring 16, so that the guide ring 15 is always close to the fixed ring 16, thereby protecting the inner wall of the connecting position of the first pipe 1 and the second pipe 2 to avoid poor sealing due to wear, and the sealing of the connecting position of the guide ring 15 and the fixed ring 16 can be guaranteed by setting the sealing ring 19. Then, when the powder is stopped, the movable plate 13 is no longer impacted, so that it rotates and resets under the stored force of the vortex spring 18, and uses the connecting plate 14 to drive the guide ring 15 to reset and move away from the fixed ring 16.

[0040] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing structure for preventing powder leakage, comprising a first pipe (1) and a second pipe (2), wherein a first flange (3) is fixed to the right end of the first pipe (1), a second flange (4) is fixed to the left end of the second pipe (2), and the first flange (3) and the second flange (4) are connected by a plurality of bolts; It is characterized in that Also includes: A first protective ring (7) is sleeved and fixed on the outer side of the right end of the first pipe (1), a second protective ring (8) is sleeved and fixed on the outer side of the left end of the second pipe (2), and a positioning block (9) is installed on the right side of the first protective ring (7); A positioning groove (10) is provided on the left side of the second protective ring (8), and an air storage bag (11) is provided on the right side of the inner wall of the positioning groove (10); a sealing air bag (5) is embedded and installed on the left side of the second flange (4); a sealing groove (6) is provided on the right side of the first flange (3); and the sealing air bag (5) is fixedly connected to the air pipe (12) via the air pipe (12).

2. A sealing structure for preventing powder leakage according to claim 1, characterized in that: The four positioning blocks (9) are distributed at equal angles on the right side of the first protective ring (7), and the positions of the positioning blocks (9) and the positioning grooves (10) correspond one to one, and the positioning blocks (9) and the positioning grooves (10) are snap-fitted.

3. A sealing structure for preventing powder leakage according to claim 1, characterized in that: The air storage bags (11) are bonded to the inner wall of the positioning groove (10), and the four air storage bags (11) are connected to the sealing air bags (5) via air delivery pipes (12).

4. A sealing structure for preventing powder leakage according to claim 1, characterized in that: One-way valves (17) are installed inside the four gas delivery pipes (12).

5. A sealing structure for preventing powder leakage according to claim 1, characterized in that: The inner wall of the first pipe (1) is hinged with movable plates (13) at equal angles, and a guide ring (15) is arranged on the right side inside the first pipe (1), and the guide ring (15) and the four movable plates (13) are connected via a connecting plate (14); a fixing ring (16) is fixedly connected to the inner side of the second flange (4), and a sealing ring (19) is arranged on the left side of the fixing ring (16).

6. A sealing structure for preventing powder leakage according to claim 5, characterized in that: Both ends of the connecting plate (14) are hingedly connected to the side surface of the movable plate (13) and the left side of the guide ring (15).

7. A sealing structure for preventing powder leakage according to claim 5, characterized in that: The connection positions of the shaft ends of the four movable plates (13) and the first pipe (1) are all installed with vortex springs (18), and the positions of the guide ring (15) and the fixed ring (16) correspond to each other.

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