Assembled split air-tight seal structure

Abstract

A split air-tight seal structure for packaging relates to the technical field of seal structures and comprises a seal seat formed by butt joint of a first half ring and a second half ring, the seal seat is provided with a mounting channel, and the mounting channel comprises a packing mounting annular groove and a labyrinth structure annular groove which are located on the two sides respectively. An air seal annular groove is formed between the packing installation annular groove and the labyrinth structure annular groove, and the first half ring and the second half ring are each provided with an air inlet channel communicated with the air seal annular groove. The problems that in the prior art, the packing sealing effect of existing powder conveying equipment is poor, rereaming needs to be conducted in original equipment for improving the sealing structure, machining is tedious, and meanwhile the sealing performance of powder cannot be guaranteed are solved.

Description

Technical Field

[0001] The invention relates to the technical field of sealing structures, and in particular to a containerized split-type air-sealing structure. Background Art

[0002] Powder particles are small and have good fluidity. Conventional packaging equipment often leaks powder in the sealing device, causing bearings to lock. The friction at the seal causes gelatinization and contamination, affecting product quality. In order to avoid the above phenomenon, the auger seal needs to be frequently disassembled for maintenance, which not only increases the workload of maintenance personnel but also affects production progress. In order to reduce the maintenance frequency and increase the equipment life cycle, the shaft end seal of powder conveying equipment generally uses packing (packing) to ensure that the shaft end does not leak. However, the packing (packing) is mixed with leaked powder and cannot guarantee a good sealing effect.

[0003] The prior art discloses a patent with announcement number CN109399097A, which includes: an auger flange and a dragon. The auger flange is connected to the auger trough by a group of screws, a sealing gasket is installed between the auger flange and the auger trough, an auger sealing sleeve is installed at the axial step of the dragon and an interference fit is adopted, a sealing packing is covered on the outside of the auger sealing sleeve, the right end of the sealing packing is fitted with the bottom surface of the sealing gland, a group of springs are installed on the plane of the sealing gland, bolts are passed through the springs, and the bolts are connected to the auger flange through threads.

[0004] As the existing devices are used, the shortcomings of the technology are gradually exposed, mainly in the following aspects:

[0005] The packing sealing effect of the existing powder conveying equipment is not good, and the sealing structure needs to be re-expanded in the original equipment to improve the sealing structure. The processing is cumbersome and the sealing performance of the powder cannot be guaranteed.

[0006] As can be seen from the above, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0007] In view of the defects in the prior art, the present invention provides a containerized split air sealing structure to solve the problem that the packing sealing effect of the existing powder conveying equipment in the traditional technology is poor, and the structure to improve the sealing needs to be re-expanded in the original equipment, which is cumbersome to process and cannot guarantee the sealing performance of the powder.

[0008] To achieve the above object, the present invention provides the following technical solutions.

[0009] The assembled split air-sealing structure comprises a sealing seat formed by docking a first half ring and a second half ring, the sealing seat is provided with an installation channel, the installation channel comprises a packing installation annular groove and a labyrinth structure annular groove separated on both sides, an air-sealing annular groove is provided between the packing installation annular groove and the labyrinth structure annular groove, and the first half ring and the second half ring are respectively provided with air inlets connected to the air-sealing annular groove.

[0010] As an optimized solution, the diameter of the air-sealing annular groove is larger than the diameter of the labyrinth structure annular groove.

[0011] As an optimized solution, the diameter of the packing mounting annular groove is larger than the diameter of the air seal annular groove.

[0012] As an optimized solution, a first insertion groove covering the packing installation annular groove is provided on the outer wall of the sealing ring.

[0013] As an optimized solution, a second insertion groove covering the labyrinth structure annular groove is provided on the outer wall of the sealing ring.

[0014] As an optimized solution, an annular reduced diameter section is provided between the packing installation annular groove and the gas seal annular groove.

[0015] As an optimized solution, a mounting plane perpendicular to the axis of the air inlet duct is provided on the first half ring and the second half ring.

[0016] As an optimized solution, an installation groove is provided on the relative outer wall of the first half ring, a connecting through hole is provided through the installation groove, a threaded groove aligned with the connecting through hole is provided on the docking surface of the second half ring, a bolt is inserted into the connecting through hole, and the end of the bolt is against the threaded groove.

[0017] As an optimized solution, the first half ring and the second half ring are respectively provided with through holes.

[0018] As an optimized solution, the labyrinth structure annular groove is a comb-tooth labyrinth structure.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The first half ring and the second half ring are butted on the rotating shaft to form a sealing seat, and the first half ring and the second half ring are fastened by passing bolts through the connecting through holes and the threaded grooves; the second insertion groove is inserted into the groove of the original packing of the equipment, and then the packing with a small diameter is inserted into the packing installation annular groove, and then the gland is installed, and the bolts penetrate the gland and the through holes to fix the entire sealing seat to the side wall of the equipment to complete the installation; then the gas nozzle is installed using the installation plane, and the air from the gas nozzle is passed into the area between the gas seal annular groove and the rotating shaft to form an air seal; the gas seal and the labyrinth structure can effectively prevent the leakage of powder, and the packing can prevent the gas from leaking from the packing side, thereby ensuring the sealing efficiency of the powder, ensuring the sealing performance of the powder equipment, avoiding leakage, and reducing dust pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the spiral ribs of the present invention.

[0025] In the figure: 1-first half ring; 2-second half ring; 3-installation plane; 4-installation groove; 5-connection through hole; 6-threaded groove; 7-through hole; 8-air inlet; 9-labyrinth structure annular groove; 10-packing installation annular groove; 11-gas seal annular groove; 12-comb tooth labyrinth structure; 13-first insertion groove; 14-second insertion groove; 15-spiral ribs. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0027] like Figures 1 to 3As shown, the assembled split air-sealing structure comprises a sealing seat formed by docking a first half ring 1 and a second half ring 2, the sealing seat is provided with an installation channel, the installation channel comprises a packing installation annular groove 10 and a labyrinth structure annular groove 9 separated on both sides, an air-sealing annular groove 11 is provided between the packing installation annular groove 10 and the labyrinth structure annular groove 9, the first half ring 1 and the second half ring 2 are respectively provided with an air inlet duct 8 connected with the air-sealing annular groove 11.

[0028] The diameter of the air-sealing annular groove 11 is larger than the diameter of the labyrinth structure annular groove 9 .

[0029] The diameter of the packing mounting annular groove 10 is greater than the diameter of the gas seal annular groove 11 .

[0030] A first insertion groove 13 covering the packing installation annular groove 10 is provided on the outer wall of the sealing ring.

[0031] A second insertion groove 14 covering the labyrinth structure annular groove 9 is provided on the outer wall of the sealing ring.

[0032] An annular reduced diameter section is provided between the packing installation annular groove 10 and the gas seal annular groove 11 .

[0033] The first half ring 1 and the second half ring 2 are provided with a mounting plane 3 which is perpendicular to the axis of the air inlet duct 8 .

[0034] The first half ring 1 has an installation groove 4 on its relative outer wall, and a connecting through hole 5 is formed through the installation groove 4. The second half ring 2 has a threaded groove 6 on its mating surface aligned with the connecting through hole 5. A bolt is inserted into the connecting through hole 5, and the end of the bolt abuts against the threaded groove 6.

[0035] The first half ring 1 and the second half ring 2 are respectively provided with through holes 7 .

[0036] The labyrinth structure annular groove 9 is a comb-tooth labyrinth structure 12 .

[0037] A spiral rib 15 is provided on the groove wall of the air-sealing annular groove, and the air-sealing annular groove is divided into several separation areas through the area between adjacent spiral ribs and the main axis. This method can prevent the powder from quickly passing through the air-sealing annular groove when leakage occurs in the air-sealing annular groove. If there is no spiral rib 15, when the seal of the air-sealing annular groove fails, the powder will directly pass through the air-sealing annular groove and leak. The addition of spiral rib 15 can increase the resistance to the flow of powder. In order to leak, it needs to pass through several separation areas in sequence, which can further play a role in sealing the powder.

[0038] The working principle of this device is:

[0039] The first half ring 1 and the second half ring 2 are docked on the rotating shaft to form a sealing seat, and the first half ring 1 and the second half ring 2 are fastened by passing bolts through the connecting through hole 5 and the threaded groove 6; the second insertion groove 14 is inserted into the groove of the original packing of the equipment, and then the packing with a small diameter is inserted into the packing installation annular groove 10, and then the pressure cover is installed, and the pressure cover and the through hole 7 are penetrated by bolts to fix the entire sealing seat to the side wall of the equipment to complete the installation; then the air nozzle is installed using the installation plane 3, and the air from the air nozzle is passed into the area between the air seal annular groove 11 and the rotating shaft to form an air seal; the air seal and the labyrinth structure can effectively prevent the leakage of powder, and the packing can prevent the gas from leaking from the packing side, thereby ensuring the sealing efficiency of the powder, ensuring the sealing performance of the powder equipment, avoiding leakage, and reducing dust pollution.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. The containerized split gas sealing structure is characterized by: The invention comprises a sealing seat formed by butting a first half ring (1) and a second half ring (2), the sealing seat being provided with a mounting channel, the mounting channel comprising a packing mounting annular groove (10) and a labyrinth structure annular groove (9) separated on both sides, an air-sealing annular groove (11) being provided between the packing mounting annular groove (10) and the labyrinth structure annular groove (9), and the first half ring (1) and the second half ring (2) being provided with air inlets (8) respectively connected to the air-sealing annular groove (11).

2. The containerized split airtight structure according to claim 1, characterized in that: The diameter of the air-sealing annular groove (11) is greater than the diameter of the labyrinth structure annular groove (9).

3. The containerized split airtight structure according to claim 2, characterized in that: The diameter of the packing mounting annular groove (10) is greater than the diameter of the air sealing annular groove (11).

4. The containerized split airtight structure according to claim 3 is characterized in that: The outer wall of the sealing ring is provided with a first insertion groove (13) covering the packing installation annular groove (10).

5. The containerized split airtight structure according to claim 4, characterized in that: A second insertion groove (14) covering the labyrinth structure annular groove (9) is provided on the outer wall of the sealing ring.

6. The containerized split airtight structure according to claim 5, characterized in that: An annular diameter reduction section is provided between the packing installation annular groove (10) and the air sealing annular groove (11).

7. The containerized split airtight structure according to claim 1, characterized in that: The first half ring (1) and the second half ring (2) are provided with a mounting plane (3) perpendicular to the axis of the air inlet duct (8).

8. The containerized split airtight structure according to claim 1, characterized in that: The first half ring (1) has an installation groove (4) on its opposite outer wall, and a connecting through hole (5) is formed through the installation groove (4). The second half ring (2) has a threaded groove (6) on its butt joint surface aligned with the connecting through hole (5). A bolt is inserted into the connecting through hole (5), and the end of the bolt abuts against the threaded groove (6).

9. The containerized split airtight structure according to claim 1, characterized in that: The first half ring (1) and the second half ring (2) are respectively provided with through holes (7).

10. The containerized split airtight structure according to claim 1, characterized in that: The labyrinth structure annular groove (9) is a comb-tooth labyrinth structure (12).

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