CN203431180U

CN203431180U - Main shaft seal sand prevention isolating device of preimpregnation tower blender

Info

Publication number: CN203431180U
Application number: CN201320413218.0U
Authority: CN
Inventors: 万智涛; 文在江
Original assignee: Hainan Jinhai Pulp and Paper Co Ltd
Current assignee: Hainan Jinhai Pulp and Paper Co Ltd
Priority date: 2013-07-12
Filing date: 2013-07-12
Publication date: 2014-02-12
Anticipated expiration: 2023-07-12

Abstract

The utility model relates to a main shaft seal sand prevention isolating device of a preimpregnation tower blender. The main shaft seal sand prevention isolating device comprises an isolating sand prevention cone (2), a stationary sealing ring (3) and a rotating sealing ring (4). The isolating sand prevention cone (2) is fixed to a bearing chamber (5), the stationary sealing ring (3) is fixed to the isolating sand prevention cone (2), and the rotating sealing ring (4) is fixed to an auxiliary stirring vane (6) at the bottom and rotates along with the rotation of the stirring vane. The clearance between the rotating sealing ring and the stationary sealing ring is only 1mm. Under the action of the rotating sealing ring and the stationary sealing ring, a packing seal (8) of a main shaft (7) is isolated from sand, sand cannot enter the sand prevention isolating device, and therefore damage to the seal due to the fact that the deposited sand enters the packing seal (8) is avoided, and liquid leakage and equipment failures are avoided.

Description

The main shaft seal sand control isolation mounting of preimpregnation tower stirrer

Technical field

The utility model relates to pulping and paper-making preimpregnation tower, is specifically related to a kind of main shaft seal sand control isolation mounting of preimpregnation tower stirrer.

Background technique

Preimpregnation tower is the important digesting apparatus in continuous steaming-boiling technology production in pulping and paper-making production line.Under the wood chip that the enters preimpregnation tower effect of portion's High Temperature High Pressure within it, react with cooking liquor, realize predecomposition.

Preimpregnation tower comprises housing, top spiral, top sieve basket, bottom material scraper and hydraulic driving system.The effect of bottom material scraper is that the wood chip that completes pre-boiling is stirred and scraped, and is delivered to next workshop section.In prior art, the main shaft seal of material scraper is packing_seal, as shown in accompanying drawing 1, accompanying drawing 2.

Owing to entering in the wood chip of preimpregnation tower, contain the impurity such as sand grains, the density of sand grains is easily deposited on greatly the bottom of tower, and the height of discharge gate will be higher than main shaft seal, therefore, with regard to seal arrangement at the bottom of having sand grains and being deposited on tower always, around cannot discharge.Along with the rotation of main shaft, sand grains is easy to enter packing_seal device, and main shaft and packing_seal are damaged, and causes revealing.

Model utility content

In order to overcome above-mentioned defect, the purpose of this utility model is, a kind of main shaft seal sand control isolation mounting of preimpregnation tower stirrer is provided, and sand is isolated in to packing_seal outside, prevents that sand from entering main shaft and packing_seal, causes revealing to avoid sealing wear.

The utility model is that the technological scheme that its technical problem of solution adopts is:

The main shaft seal sand control isolation mounting of preimpregnation tower stirrer, is characterized in that: comprise isolation anti-abrasive cone, close

Envelope fixed ring and moving sealing ring three parts; Isolate anti-abrasive cone and be fixed on bearing chamber, sealing fixed ring is fixed on isolation

On anti-abrasive cone, moving sealing ring is fixed on the secondary mixing blade of bottom, along with the rotation of mixing blade, rotates.

Gap between described moving sealing ring and stationary seal ring is only 1mm; Under the seal action of dynamic and static ring,

The packing_seal of main shaft and sand are kept apart, and sand can not enter in sand control isolation mounting, thereby has avoided the sand grains of deposition to enter packing_seal and cause wearing and tearing.

Its beneficial effect that the utility model provides is, by the impurities such as sand that cause main shaft and packing seal to be worn and torn externally, it can not be entered in sealing, thereby has avoided sand grains deposition to gland sealed infringement, has avoided leakage and equipment failure.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is bottom material scraper embryonal structure schematic diagram;

Fig. 2 is sealed structural representation of the present utility model;

Fig. 3 is sealing configuration enlarged view of the present utility model.

In figure: 1. bottom material scraper, the 2. anti-abrasive cone of isolation, 3. stationary seal ring, 4. moving sealing ring, 5. bearing chamber, 6. secondary mixing blade, 7. main shaft, 8. packing_seal.

Embodiment

Isolate anti-abrasive cone 2 and be fixed on bearing chamber 5 upper surfaces, stationary seal ring 3 is bolted on the anti-abrasive cone 2 of isolation, and moving sealing ring 4 is bolted on the secondary mixing blade 6 of bottom, along with the rotation of secondary mixing blade 6, rotates.Gap between moving sealing ring 4 and stationary seal ring 3 is only 1mm.Under the seal action of dynamic and static ring, the packing_seal of main shaft 78 and sand are kept apart, sand can not enter in sand cap, and liquid can enter in sand control isolation mounting by the gap between moving sealing ring 4 and stationary seal ring 3, and packing_seal 8 is lubricated.

Claims

1. the main shaft seal sand control isolation mounting of preimpregnation tower stirrer, comprises isolation anti-abrasive cone (2), sealing fixed ring (3) and moving sealing ring (4); It is characterized in that: isolate anti-abrasive cone (2) and be fixed on bearing chamber (5), sealing fixed ring (3) is fixed on the anti-abrasive cone of isolation (2), secondary mixing blade (6) bottom moving sealing ring (4) is fixed on is upper, along with the rotation of mixing blade, rotates.

2. the main shaft seal sand control isolation mounting of preimpregnation tower stirrer according to claim 1, is characterized in that: the gap between moving sealing ring (4) and stationary seal ring is 1mm; Under the seal action of dynamic and static ring, the packing_seal of main shaft (7) (8) and sand to be kept apart, sand can not enter in sand control isolation mounting.