Corrugated pipe single-end-face packaging sealing device

Abstract

The utility model provides a single-end-face packaging sealing device for a corrugated pipe. The single-end-face packaging sealing device comprises a movable ring assembly arranged at the atmosphere end and a static ring assembly arranged at the medium end. An outer box is arranged on the outer side of the movable ring assembly, a cavity for containing waste gas is formed between the outer box and the movable ring assembly, and the end, away from the static ring assembly, of the cavity is blocked through an end sealing assembly, so that purging gas in a sealing box body can be prevented from leaking outwards. The movable ring of the corrugated pipe is fixed on the shaft sleeve and is driven by the bearing to rotate, the second sealing ring and the main shaft of equipment form a sealing point, the shaft sleeve is isolated at the atmosphere end and is not in direct contact with a medium, and the sealing device is suitable for glass lining kettles with large deflection amount and special steel kettles with strong corrosion working conditions. According to the utility model, the container type connection is adopted, and the advantages of convenience in transportation and installation are realized on the premise of excellent sealing performance.

Description

Technical Field

[0001] The utility model relates to a mechanical seal, in particular to a bellows single-end face container seal device. Background Art

[0002] Mechanical seals are used in industrial production to effectively seal grease, fuel and gas in the fluid of the equipment, ensuring the safety of the equipment operation process. Bellows single-end seal is a common mechanical seal, which uses the elasticity of the bellows to dynamically seal the medium and has the advantage of large deflection. However, in the chemical and pharmaceutical industry, due to environmental protection requirements, higher requirements have been put forward for mechanical seals. Conventional single-end mechanical seals have been excluded by many companies because they cannot effectively prevent the leakage of corrosive gases.

[0003] Therefore, it is necessary to provide a bellows single-end face sealing device, which can give full play to the advantage of the large deflection of the bellows while ensuring its single-end face sealing capability. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a bellows single-end face container seal device, including a dynamic ring assembly, wherein the dynamic ring assembly includes a bellows dynamic ring arranged at the atmospheric end of the main shaft and a dynamic ring seat supporting the bellows dynamic ring;

[0005] The stationary ring assembly comprises a stationary ring arranged at the end of the spindle device, the stationary ring contacts the elastic end of the bellows moving ring to form an end face seal and is connected to the kettle flange through the stationary ring seat;

[0006] A shaft sleeve is fixedly arranged on the outer side of the main shaft and is drivingly connected with an end of the moving ring assembly away from the stationary ring assembly;

[0007] The outer box is arranged on the outer side of the moving ring assembly, and one end of the outer box abuts against the stationary ring seat;

[0008] The end sealing assembly is located at the end of the outer box away from the stationary ring assembly, and includes a gland sleeved on the outer side of the shaft sleeve, and the gland is press-fitted on the end of the outer box away from the stationary ring assembly; a sealing part is arranged between the gland and the shaft sleeve, and dynamically seals the shaft sleeve when the main shaft rotates; and at least one set of anti-rotation fasteners arranged on the gland, and the gland is connected to the kettle flange through the anti-rotation fasteners;

[0009] The outer box, the end sealing assembly, the dynamic ring assembly and the static ring assembly form a sealed chamber.

[0010] Furthermore, the sealing portion is a lip seal or a packing seal.

[0011] Furthermore, an inner ring groove is provided on the end surface of the gland opposite to the shaft sleeve, and the sealing portion is filled in the inner ring groove.

[0012] Furthermore, the end sealing assembly includes an end cover, the inner ring groove is open at one end away from the outer box, and the end cover is located at the open end of the inner ring groove and is fixed to the gland surface through an end cover fastener.

[0013] Furthermore, a positioning card is provided at one end of the end cover away from the stationary ring assembly. The positioning card is clamped on the outer circumference of the shaft sleeve and fixed to the surface of the end cover through an end cover fastener.

[0014] Furthermore, a transmission connection piece radially connected to the main shaft is arranged on the shaft sleeve so as to rotate together with the main shaft.

[0015] Furthermore, an annular groove is provided on the end surface of the bellows movable ring opposite to the shaft sleeve, and the end of the shaft sleeve extends into the annular groove.

[0016] Furthermore, the dynamic ring seat extends to the outside of the shaft sleeve and is pressed onto the surface of the shaft sleeve through a dynamic ring fastener.

[0017] Furthermore, the anti-rotation fastener is a fastening bolt, and the bolt body of the fastening bolt passes through a stationary ring seat.

[0018] Furthermore, an air inlet and an air outlet connected to the chamber are respectively provided on the surface of the gland.

[0019] The utility model provides a single-end-face container sealing device for a bellows, comprising a dynamic ring assembly arranged at the atmosphere end and a static ring assembly arranged at the medium end; an outer box is arranged on the outer side of the dynamic ring assembly, a chamber for accommodating waste gas is formed between the outer box and the dynamic ring assembly, and one end of the chamber away from the static ring assembly is sealed by an end sealing assembly, which can prevent the purge gas in the sealed box from leaking out.

[0020] The bellows movable ring of the utility model is fixed on the shaft sleeve and driven to rotate by the bearing. The second sealing ring forms a sealing point with the main shaft of the equipment, isolating the shaft sleeve at the atmospheric end and preventing it from directly contacting the medium. The utility model is suitable for glass-lined kettles with large deflection and special steel kettles under strong corrosion conditions.

[0021] The first sealing ring and the second sealing ring of the utility model respectively seal the two static sealing points of the static ring assembly and the bellows dynamic ring, which can effectively prevent the leakage of the medium.

[0022] The stationary ring assembly, the outer box, the kettle mouth flange and the end sealing assembly of the utility model adopt a container-type design, and are then connected with the dynamic ring assembly and the shaft sleeve through a positioning card, so the utility model has the advantages of convenient transportation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the single-end container sealing device of the bellows of the utility model;

[0024] Figure 2It is the connection diagram of the static ring assembly;

[0025] Figure 3 It is a connection diagram of the shaft sleeve and the moving ring assembly;

[0026] Figure 4 It is a structural schematic diagram of the positioning chuck connected to the bayonet.

[0027] Figure numerals: bellows dynamic ring 1, dynamic ring seat 2, spring seat 3, stationary ring 4, stationary ring seat 5, kettle mouth flange 6, shaft sleeve 7, transmission connecting part 8, annular groove 9, dynamic ring fastener 10, outer box 11, chamber 12, pressure cover 13, sealing part 14, inner ring groove 15, anti-rotation fastener 16, end cover 17, end cover fastener 18, positioning card 19, first sealing ring 20, second sealing ring 21, third sealing ring 22, elastic retaining ring 23, main shaft 24, equipment 25. DETAILED DESCRIPTION

[0028] like Figure 1 A bellows single-end assembly seal device is shown, comprising a dynamic ring assembly and a stationary ring assembly arranged outside the main shaft 24. The end where the dynamic ring assembly is located is the atmospheric end, comprising a bellows dynamic ring 1 and a dynamic ring seat 2, wherein the fixed end of the bellows dynamic ring 1 is supported by the dynamic ring seat 2. The dynamic ring assembly also comprises a spring seat 3 arranged outside the elastic end of the bellows dynamic ring 1, wherein a spring is connected between the spring seat 3 and the dynamic ring seat 2, and the spring seat 3 dynamically supports the elastic end of the bellows.

[0029] One end where the stationary ring assembly is located is the medium end, including a stationary ring 4 arranged at the equipment end of the main shaft 24. The stationary ring 4 contacts the elastic end of the bellows dynamic ring 1 to form an end face seal and is connected to the kettle mouth flange 6 through the stationary ring seat 5; the kettle mouth flange 6 is installed on the equipment 25, and the dynamic ring assembly and the stationary ring assembly cooperate to seal the leakage surface of the equipment 25.

[0030] The sleeve 7 is fixedly mounted on the outside of the main shaft 24 and is in driving connection with the end of the moving ring assembly away from the stationary ring assembly. As shown in the figure, a radial transmission connector 8 is provided on the sleeve 7, so that it rotates with the main shaft 24 and transmits the rotational power to the moving ring assembly. In this embodiment, the transmission connector 8 is a transmission screw that penetrates the surface of the sleeve 7. Compared with the threaded fastener, the fixing of the screw is non-directional, and the tightness of the connection between the sleeve 7 and the main shaft 24 can be maintained for a long time.

[0031] like Figure 3 As shown, an annular groove 9 is provided on the end surface of the bellows movable ring 1 opposite to the shaft sleeve 7, and the end of the shaft sleeve 7 extends into the annular groove 9, and the relative position between the movable ring assembly and the shaft sleeve 7 is limited by the annular groove 9.

[0032] The dynamic ring seat 2 extends to the outside of the shaft sleeve 7 and is press-fitted onto the surface of the shaft sleeve 7 through the dynamic ring fastener 10, thereby further improving the transmission stability between the dynamic ring assembly and the shaft sleeve 7.

[0033] The outer box 11 is disposed on the outer side of the dynamic ring assembly, and one end thereof is disposed against the static ring seat 5 .

[0034] The end sealing assembly is located at one end of the outer box 11 away from the static ring assembly. A sealed chamber 12 is enclosed between the outer box 11, the end sealing assembly, the dynamic ring assembly and the static ring assembly. The waste gas generated at the medium end is stored in the chamber 12 through the sealed end surface.

[0035] The end seal assembly includes a gland 13, which is sleeved on the outside of the shaft sleeve 7 and press-fitted on the end of the outer box 11 away from the stationary ring assembly. The two ends of the outer box 11 are sealed and docked with the stationary ring seat 5 and the gland 13 respectively. A sealing portion 14 is provided between the gland 13 and the shaft sleeve 7 to dynamically seal the shaft sleeve 7 when the main shaft 24 rotates. In this embodiment, the sealing portion 14 is a lip seal or a packing seal to prevent the waste medium from leaking from the space between the gland 13 and the shaft sleeve 7.

[0036] Furthermore, the end surface of the gland 13 opposite to the shaft sleeve 7 is provided with an inner annular groove 15, the inner annular groove 15 is open at one end away from the outer box 11, and the sealing part 14 is filled in the inner annular groove 15 to fix the sealing position between the gland 13 and the shaft sleeve 7. Furthermore, the end sealing assembly includes an end cover 17, which is located at one end of the opening of the inner annular groove 15 and is fixed to the surface of the gland 13 by an end cover fastener 18. The sealing part 14 is installed in the inner annular groove 15, and then the end cover 17 is installed in the opening of the inner annular groove 15, which has the advantage of quick disassembly and assembly while maintaining the position of the sealing part 14.

[0037] At least one set of anti-rotation fasteners 16 connected to the kettle mouth flange 6 is provided on the pressure cover 13, which can fix the pressure cover 13 on the kettle mouth flange 6; the pressure cover 13 pushes the outer box 11, the outer box 11 pushes the static ring seat 5, and the static ring seat 5 pushes the kettle mouth flange 6, thereby realizing the container setting of the static ring assembly, end sealing assembly, kettle mouth flange 6 and other one side of the static ring 4.

[0038] In this embodiment, the anti-rotation fastener 16 is a fastening bolt, which passes through the stationary ring seat 5. The bolt body of the fastening bolt can limit the movement of the stationary ring seat 5 while fixing the position of the pressure cover 13, thereby ensuring the stability of the container structure.

[0039] Further as Figure 4As shown, a positioning card 19 is provided at one end of the end cover 17 away from the stationary ring assembly, a bayonet is provided on the outer circumference of the shaft sleeve 7 and the positioning card 19 is inserted into the bayonet to limit the axial movement of the positioning card 19 relative to the shaft sleeve 7. At this time, the end cover fastener 18 is used to fix the position of the positioning card 19 and the end cover 17, and the stationary ring assembly, the end sealing assembly, and the kettle flange 6 are restricted on the shaft sleeve 7. The entire sealing device forms a container structure, which can be easily transferred; the entire container structure is installed on the equipment 25 through the kettle flange 6, and then the positioning card 19 is removed for use.

[0040] Two dynamic sealing points are formed between the bellows dynamic ring 1 and the static ring 4, and between the gland 13 and the sleeve 7. There are also static sealing points on one side of the static ring assembly and the dynamic ring assembly. Specifically, a first sealing ring 20 is provided at the contact position between the static ring 4 and the kettle flange 6, and a second sealing ring 21 is provided between the fixed end of the bellows dynamic ring 1 and the main shaft 24, wherein the second sealing ring 21 can prevent the medium from flowing from the inner side of the bellows dynamic ring 1 to the sleeve 7 at the atmosphere end, thereby damaging the surface of the sleeve 7.

[0041] In this embodiment, the kettle mouth flange 6, the stationary ring 4, and the bellows moving ring 1 that are in contact with the medium are all set to non-metallic materials, such as the stationary ring 4 made of reinforced tetrafluoroethylene and the bellows moving ring 1 made of perfluororubber; the sleeve 7 is isolated at the atmospheric end and will not contact the medium, and can be set to common stainless steel material.

[0042] In addition, a third sealing ring 22 is provided on the inner side of the shaft sleeve 7 close to the main shaft 24 to apply a pressing force to the shaft sleeve 7 to maintain dynamic contact between the shaft sleeve 7 and the sealing portion 14 .

[0043] like Figure 2 As shown, an elastic circlip 23 is provided between the stationary ring 4 and the stationary ring seat 5, and the elastic circlip 23 is installed on the kettle flange 6 and protrudes from the surface of the stationary ring seat 5. The elastic circlip 23 can quickly locate the position of the stationary ring 4, and has the advantage of rapid installation.

[0044] Furthermore, in this embodiment, an air inlet and an air outlet are respectively provided on the surface of the gland 13, and the air inlet and the air outlet are respectively connected to the chamber 12. During operation, the air inlet and the air outlet are in a blocked state, and the exhaust gas is stored in the chamber 12. When the equipment 25 is maintained, an air collecting mechanism is installed at the air outlet and nitrogen is introduced into the air inlet, so that the exhaust gas in the chamber 12 of the outer box 11 can be cleaned and blown to the air collecting mechanism.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. Bellows single-end assembly sealing device, characterized by: The invention comprises a dynamic ring assembly, wherein the dynamic ring assembly comprises a bellows dynamic ring (1) arranged at the atmospheric end of a main shaft (24) and a dynamic ring seat (2) supporting the bellows dynamic ring (1); A stationary ring assembly comprises a stationary ring (4) arranged at the equipment end of a main shaft (24), wherein the stationary ring (4) contacts the elastic end of a bellows dynamic ring (1) to form an end face seal and is connected to a kettle flange (6) through a stationary ring seat (5); A shaft sleeve (7) is fixedly arranged on the outside of the main shaft (24) and is drivingly connected to an end of the moving ring assembly away from the stationary ring assembly; The outer box (11) is arranged on the outer side of the dynamic ring assembly, and one end of the outer box is arranged to abut against the static ring seat (5); An end sealing assembly is located at one end of the outer box (11) away from the stationary ring assembly, comprising a gland (13) sleeved on the outside of the shaft sleeve (7), the gland (13) being press-fitted on the end of the outer box (11) away from the stationary ring assembly; a sealing portion (14) disposed between the gland (13) and the shaft sleeve (7) to dynamically seal the shaft sleeve (7) when the main shaft (24) rotates; and at least one set of anti-rotation fasteners (16) disposed on the gland (13), the gland (13) being connected to the kettle flange (6) via the anti-rotation fasteners (16); A sealed chamber (12) is enclosed between the outer box (11), the end sealing assembly, the dynamic ring assembly and the static ring assembly.

2. The single-end container seal device for a bellows according to claim 1, characterized in that: The sealing portion (14) is a lip seal or a packing seal.

3. The single-end container seal device for a bellows according to claim 1, characterized in that: An inner annular groove (15) is provided on the end surface of the gland (13) opposite to the shaft sleeve (7), and the sealing portion (14) is filled in the inner annular groove (15).

4. The single-end container seal device for a bellows as claimed in claim 3, characterized in that: The end sealing assembly comprises an end cover (17), the inner annular groove (15) is open at one end away from the outer box (11), and the end cover (17) is located at the open end of the inner annular groove (15) and is fixed to the surface of the gland (13) by an end cover fastener (18).

5. The single-end container seal device for a bellows as claimed in claim 4, characterized in that: A positioning card (19) is provided at one end of the end cover (17) away from the stationary ring assembly. The positioning card (19) is clamped on the outer circumference of the shaft sleeve (7) and fixed to the surface of the end cover (17) through an end cover fastener (18).

6. The single-end container seal device for a bellows according to claim 1, characterized in that: A transmission connection piece (8) radially connected to the main shaft (24) is arranged on the shaft sleeve (7) so as to rotate together with the main shaft (24).

7. The single-end container seal device for a bellows according to claim 1, characterized in that: An annular groove (9) is arranged on the end surface of the bellows movable ring (1) opposite to the shaft sleeve (7), and the end of the shaft sleeve (7) extends into the annular groove (9).

8. The single-end container seal device for a bellows according to claim 6, characterized in that: The dynamic ring seat (2) extends to the outside of the shaft sleeve (7) and is pressed onto the surface of the shaft sleeve (7) through the dynamic ring fastener (10).

9. The single-end container seal device for a bellows according to claim 1, characterized in that: The anti-rotation fastener (16) is a fastening bolt, and the bolt body of the fastening bolt passes through the stationary ring seat (5).

10. The single-end container seal device for a bellows according to claim 1, characterized in that: An air inlet and an air outlet which are in communication with the chamber (12) are respectively provided on the surface of the pressure cover (13).

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