CN212120402U

CN212120402U - Explosion-proof type decanter centrifuge based on carbocycle is sealed

Info

Publication number: CN212120402U
Application number: CN201921653482.5U
Authority: CN
Inventors: 高建生; 卢仁伟; 李邦; 李志勇; 王存林; 杨超
Original assignee: CSSC Nanjing Luzhou Machine Co Ltd
Current assignee: CSSC Nanjing Luzhou Machine Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-12-11
Anticipated expiration: 2029-09-30

Abstract

The utility model relates to an explosion-proof type spiral shell centrifuge crouches based on carbocycle is sealed, including the rotary drum, be provided with the spiral in the rotary drum, the inside cavity of spiral, the cavity inside and the inlet pipe of spiral are linked together, a plurality of dynamic seal points have on the rotary drum dynamic seal point is provided with the carbocycle and seals. The utility model has the advantages that adopt the carbocycle sealed, the carbocycle sealing department medium is zero to leak, and required sealed gas flow is few in the operation process, and the sealed life of carbocycle is longer, and the carbocycle is sealed to adopt subdivision formula seal structure simultaneously, and installation, maintenance and maintenance are convenient.

Description

Explosion-proof type decanter centrifuge based on carbocycle is sealed

Technical Field

The utility model relates to an explosion-proof spiral shell centrifuge that crouches, concretely relates to adopt carbocycle to seal and carry out explosion-proof spiral shell centrifuge that crouches that airtight type is sealed belongs to engineering machine tool technical field.

Background

In the industries of medicine, chemical engineering and the like, a large amount of horizontal screw centrifuges are needed for separating inflammable and explosive materials. The conventional horizontal screw centrifuge generally adopts the modes of packing sealing, labyrinth sealing and the like at three dynamic sealing points, however, the conventional horizontal screw centrifuge adopting the sealing modes of packing sealing, labyrinth sealing and the like cannot be used in explosion-proof occasions because medium leakage risks still exist at the three dynamic sealing points, and the sealing structure with more advanced technology is required.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the defects in the prior art, the carbon ring seal-based explosion-proof horizontal screw centrifuge is provided, three dynamic seal points of the horizontal screw centrifuge are hermetically sealed by adopting carbon ring seal, zero leakage of a process medium is realized, and the horizontal screw centrifuge can safely operate in toxic, corrosive and inflammable and explosive media.

In order to reach above purpose, the utility model provides an explosion-proof type spiral shell centrifuge crouches based on carbocycle is sealed, including the rotary drum, be provided with the spiral in the rotary drum, the inside cavity of spiral, the cavity inside and the inlet pipe of spiral are linked together, a plurality of dynamic seal points have on the rotary drum dynamic seal point is provided with the carbocycle and seals.

The utility model discloses an effectual explosion-proof spiral shell centrifuge that crouches's dynamic seal provides the explosion-proof spiral shell centrifuge that crouches that can be in safe operation under the occasion of poisonous, corrosivity and flammable explosive medium. The utility model discloses an explosion-proof spiral shell centrifuge that crouches adopts the carbocycle to seal three dynamic seal point, and nitrogen gas is totally replaced into through the nitrogen gas entry on the housing in with the housing before centrifuge starts, and the nitrogen gas entry on the carbon ring seal of rethread fills into sealed nitrogen gas, and inside the some entering housing of the clearance by between quiet ring and rotation axis (rotating ring), another part got into the atmosphere of the nitrogen gas that fills. The pressure of the sealing gas is kept to be higher than the pressure in the encloser of the horizontal screw machine, when the centrifugal machine runs at high speed, because the static ring and the rotating shaft (moving ring) which are sealed by the carbon ring can not be completely concentric, the static ring can float under the pressure, a tiny gap (namely a gas film) can be formed between the static ring and the rotating shaft (moving ring) of the centrifugal machine, the carbon ring seal is communicated with the inner cavity of the encloser during the running, the medium in the encloser can be prevented from leaking due to the existence of the difference between the internal pressure and the external pressure and the interception and leakage prevention effect of the gas film, and the filled nitrogen enables the inner cavity of the encloser to be in an inert state and a. In a word, the utility model discloses an explosion-proof spiral shell centrifuge that crouches possesses sealed reliable, nitrogen gas consumption is little, maintain advantages such as convenient.

Furthermore, the carbocycle is sealed mainly to be become by base member, quiet ring, extension spring and rotating ring, the rotating ring sets up in the base member be provided with quiet ring and extension spring between base member and the rotating ring.

Furthermore, an annular groove is formed in the base body, a static ring is arranged in the annular groove, and a tension spring is arranged on the outer end face of the static ring.

Furthermore, the rotating ring is sleeved at the end part of the rotating drum, a gap is formed between the base body and the rotating ring, the inner end of the static ring is arranged in the gap, and the inner end face of the static ring is in sealing fit with the outer end face of the rotating ring to seal the gap.

Furthermore, the base body is provided with an air hole communicated with the gap.

In the structure, the carbon ring seal mainly comprises four parts, namely a base body, a static ring, a tension spring and a dynamic ring. When no sealing gas is injected in a static state, the static rings (each static ring is composed of a three-flap arc structure, and the three-flap arc structures are combined into a complete ring through the tension spring) are attached and contacted with the dynamic ring under the action of the tension spring; because the static ring and the dynamic ring can not be completely concentric, when the dynamic ring rotates at a high speed, the static ring can be propped open and float under the action of sealing air, a tiny gap (namely an air film) can be formed between the static ring and the dynamic ring, and because the pressure of the filled sealing air is higher than that of the sealed medium and the interception and leakage-prevention action of the air film, the sealed medium cannot leak.

Furthermore, the big end of the rotary drum is arranged on a first support surface of the machine base through a first bearing seat, and the small end of the rotary drum is arranged on a second support surface of the machine base through a second bearing seat.

Further, a housing is sleeved outside the rotary drum.

Furthermore, the outer end of the feeding pipe is sleeved with a feeding pipe support.

Furthermore, a first carbon ring seal is arranged between the first bearing seat and the housing at the large head end of the rotary drum, a second carbon ring seal is arranged between the second bearing seat and the housing at the small head end of the rotary drum, and a third carbon ring seal is arranged between the second bearing seat and the feeding pipe support at the small head end of the rotary drum.

In the structure, carbon ring sealing is adopted at three dynamic sealing points of the horizontal screw centrifuge for airtight sealing.

Further, the big head end of the rotary drum is connected with a differential.

The utility model has the advantages that adopt the carbocycle sealed, the carbocycle sealing department medium is zero to leak, and required sealed gas flow is few in the operation process, and the sealed life of carbocycle is longer, and the carbocycle is sealed to adopt subdivision formula seal structure simultaneously, and installation, maintenance and maintenance are convenient.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the middle carbon ring seal of the present invention.

In the figure: 1. the differential mechanism comprises a differential mechanism, 2, a first bearing seat, 3, a first carbon ring seal, 4, a housing, 5, a rotary drum, 6, a screw, 7, a feeding pipe, 8, a second carbon ring seal, 9, a second bearing seat, 10, a third carbon ring seal, 11, a feeding pipe support, 12, a first support surface of a machine base, 13, a base body, 14, a static ring, 15, a tension spring, 16, a movable ring and 17, a second support surface of the machine base.

Detailed Description

Example one

As shown in fig. 1, the explosion-proof horizontal decanter centrifuge based on the carbon ring seal comprises a base, a housing 4 and a feed pipe support 11 which are fixed on the base, a feed pipe 7, a rotary drum 5 protected by the housing 4, the carbon ring seal and a pushing screw 6. The rotary drum 5 is sleeved with a housing 4, the housing 4 is provided with a nitrogen inlet and two nitrogen outlets, the large head end of the rotary drum 5 is arranged on a first support surface 17 of the machine base through a first bearing seat 2, the small head end of the rotary drum 5 is arranged on a second support surface 12 of the machine base through a second bearing seat 9, and the large head end of the rotary drum 5 is connected with the differential 1. A spiral 6 is arranged in the rotary drum 5, the spiral 6 is hollow, the hollow interior of the spiral 6 is communicated with a feeding pipe 7, and a feeding pipe support 11 is sleeved at the outer end of the feeding pipe 7.

The rotary drum 5 is provided with three dynamic sealing points, and carbon ring seals are arranged at the three dynamic sealing points. Namely, a first carbon ring seal 3 is arranged between the first bearing seat 2 and the housing 4 at the large end of the rotary drum 5, a second carbon ring seal 8 is arranged between the second bearing seat 9 and the housing 4 at the small end of the rotary drum 5, and a third carbon ring seal 10 is arranged between the second bearing seat 9 and the feeding pipe support 11 at the small end of the rotary drum 5. First carbon ring seal 3, second carbon ring seal 8, third carbon ring seal 10 mainly comprise base member 13, quiet ring 14, extension spring 15 and rotating ring 16, and rotating ring 16 installs on rotary drum 5, and quiet ring 14 sets up in base member 13 through extension spring 15, and rotating ring 16 sets up in base member 13, is provided with quiet ring 14 and extension spring 15 between base member 13 and rotating ring 16. A plurality of annular grooves are formed in the base body 13, a static ring 14 is arranged in each annular groove, and a tension spring 15 is arranged on the outer end face of each static ring 14. In addition, a gap is formed between the base body 13 and the rotating ring 16, the inner end of the static ring 14 is arranged in the gap, the inner end surface of the static ring 14 is in sealing joint with the outer end surface of the rotating ring 16 for gap sealing, a nitrogen inlet A communicated with the gap is further arranged on the base body 13, and nitrogen charging and sealing are carried out through the nitrogen inlet.

During actual use, carbon ring sealing is adopted at three dynamic sealing points of the horizontal screw centrifuge, before the horizontal screw centrifuge is started, nitrogen is filled through a nitrogen inlet on the housing 4, original air in the process loop and the housing 4 of the horizontal screw centrifuge is replaced, and inert gas is filled in the process loop and the housing 4 of the horizontal screw centrifuge, so that the process loop and the housing 4 of the horizontal screw centrifuge are in an inert state, and the air in the housing and a sealed inflammable and explosive medium are prevented from being mixed into explosive gas. When the horizontal decanter centrifuge runs at a high speed, sealed nitrogen is introduced into the carbon ring sealing position through the nitrogen inlet A, and the pressure of the gas in the process loop is adjusted, so that the pressure of the sealed nitrogen gas of the carbon ring is higher than the pressure in the housing of the horizontal decanter centrifuge, the carbon ring seal normally works, and the sealed inflammable and explosive medium is prevented from leaking to the environment. Therefore, nitrogen entering the housing through carbon ring sealing enables the housing to be always kept in an inert state, micro-positive pressure is kept inside the horizontal screw centrifuge, zero leakage of process media inside the horizontal screw centrifuge is guaranteed, and the anti-explosion purpose is achieved. Meanwhile, the pressure of the sealing gas is monitored on line, and when the pressure is lower than a normal value, an alarm is given through an electrical control system of the horizontal screw centrifuge, so that the operation reliability and safety of the explosion-proof horizontal screw centrifuge are improved.

The utility model discloses in, the effect of being full of nitrogen gas in the housing 4 before the machine starts is mainly that the original air in the housing 4 is replaced, prevents that air and sealed inflammable and explosive medium mix into explosive gas in the housing 4. The nitrogen gas is filled at the carbon ring sealing part, and mainly the static ring 14 sealed by the carbon ring is expanded to form a small gap, so that the carbon ring is sealed to normally work, the sealed inflammable and explosive medium is prevented from leaking to the environment, and meanwhile, the nitrogen gas in the housing 4 is supplemented, so that the inert state is always kept in the housing 4.

In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. The utility model provides an explosion-proof type decanter centrifuge based on carbocycle is sealed which characterized in that: the device comprises a rotary drum (5), wherein a spiral (6) is arranged in the rotary drum (5), the interior of the spiral (6) is hollow, the hollow interior of the spiral (6) is communicated with a feeding pipe (7), a plurality of dynamic sealing points are arranged on the rotary drum (5), and carbon ring sealing is arranged at the dynamic sealing points; the carbocycle is sealed mainly to be become by base member (13), quiet ring (14), extension spring (15) and rotating ring (16), rotating ring (16) set up in base member (13) be provided with quiet ring (14) and extension spring (15) between base member (13) and rotating ring (16).

2. The explosion-proof horizontal decanter centrifuge based on a carbon ring seal as claimed in claim 1, wherein: an annular groove is formed in the base body (13), a static ring (14) is arranged in the annular groove, and a tension spring (15) is arranged on the outer end face of the static ring (14).

3. The explosion-proof horizontal decanter centrifuge based on a carbon ring seal as claimed in claim 2, wherein: the rotating ring (16) is sleeved at the end part of the rotating drum (5), a gap is formed between the base body (13) and the rotating ring (16), the inner end of the static ring (14) is arranged in the gap, and the inner end surface of the static ring (14) is in sealing fit with the outer end surface of the rotating ring (16).

4. An explosion-proof horizontal decanter centrifuge based on a carbon ring seal as claimed in claim 3, wherein: the base body (13) is provided with air holes communicated with the gaps.

5. The explosion-proof horizontal decanter centrifuge based on a carbon ring seal as claimed in claim 1, wherein: the large end of the rotary drum (5) is arranged on a first support surface (17) of the machine base through a first bearing seat (2), and the small end of the rotary drum (5) is arranged on a second support surface (12) of the machine base through a second bearing seat (9).

6. The explosion-proof horizontal decanter centrifuge based on a carbon ring seal as claimed in claim 1, wherein: the rotary drum (5) is sleeved with a housing (4).

7. The explosion-proof horizontal decanter centrifuge based on a carbon ring seal as claimed in claim 1, wherein: the outer end of the feeding pipe (7) is sleeved with a feeding pipe support (11).

8. The explosion-proof horizontal decanter centrifuge based on a carbon ring seal as claimed in claim 5, wherein: a first carbon ring seal (3) is arranged between a first bearing seat (2) and a housing (4) at the large end of the rotary drum (5), a second carbon ring seal (8) is arranged between a second bearing seat (9) and the housing (4) at the small end of the rotary drum (5), and a third carbon ring seal (10) is arranged between the second bearing seat (9) and a feeding pipe support (11) at the small end of the rotary drum (5).

9. The explosion-proof horizontal decanter centrifuge based on a carbon ring seal as claimed in claim 1, wherein: the big end of the rotary drum (5) is connected with a differential (1).