Sunken packing sealing device

Abstract

The utility model discloses a sinking type packing sealing device which comprises a stirring kettle body, a kettle opening flange is installed at an opening in the top of the stirring kettle body, a sinking type packing box is fixedly connected to the kettle opening flange through bolts, and a stirring shaft is arranged in the sinking type packing box in a penetrating mode. A sealing cavity formed between the stirring shaft and the sunken stuffing box is filled with packing; and a packing gland is arranged at the top of the sunken packing box and is sleeved on the stirring shaft. According to the utility model, the sunken stuffing box is designed, so that the problem of poor sealing effect caused by the fact that the existing stuffing box is exposed outside the kettle body and cannot be filled with multiple circles of packing due to the limitation of installation space is solved. The sunken stuffing box enables the installation space of the packing to be sufficient, the packing is wound around the stirring shaft in multiple layers, and the sealing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to agitated vessel sealing equipment field, specifically is a sinking type packing seal device. BACKGROUND

[0002] The packing seal is widely applied in the agitated vessel sealing field due to simple structure, low cost, convenient dismounting and maintenance.

[0003] The packing is placed in the packing box, the gland is compressed to the packing in the axial direction by screwing the gland bolt, and the packing is filled in the space between the box and the rotating shaft in a relatively uniform manner. Since the packing is a plastic material, under the action of the axial force, the packing will expand radially between the rotating shaft and the box to generate a force, so as to fill the space between the box and the rotating shaft, so that the packing and the rotating shaft are in close contact, and the purpose of preventing medium leakage is achieved. However, the contact state between the packing and the rotating shaft is non-uniform contact, and the contact part between the packing and the rotating shaft is in a "boundary lubrication" state; and the concave part not in contact forms a small oil groove with a thick oil film, and the contact part and the non-contact part form an irregular labyrinth, which plays a role in preventing liquid leakage, which is called "labyrinth effect". When the packing seal is working, the packing is in direct contact with the shaft and the packing box, and friction occurs in the reciprocating rotary motion, and the pair of friction pairs formed by the packing and the shaft are important factors affecting the reliability, durability and stability of the seal. When the packing is installed, the number of layers of the packing is too small due to the limitation of the installation space under the reducer bottom plate, thereby affecting the sealing effect. In addition, in the use process of the packing, the round runout of the shaft causes the gap between the packing and the stirring shaft to gradually increase, thereby causing harmful gas leakage. The present patent aims at the limited installation space of the packing and the too small number of layers of the packing, and designs a sinking type packing to solve the problem of poor sealing effect of the packing. SUMMARY

[0004] The utility model discloses a sinking type packing seal device to solve the problems in the above background technology.

[0005] The utility model discloses the following technical scheme:

[0006] A sinking type packing seal device, comprising an agitated vessel body, a kettle opening flange is installed at the top opening of the agitated vessel body, a sinking type packing box is fixedly connected on the kettle opening flange through bolts, a stirring shaft is arranged in the sinking type packing box, and a packing is filled in the sealing cavity formed between the stirring shaft and the sinking type packing box.

[0007] This invention features a recessed design for the stuffing box, with some or all of it submerged inside the vessel. The stuffing box is then mounted on the vessel flange using set bolts. The recessed stuffing box provides ample installation space for the packing, which is then wound around the agitator shaft in multiple layers, solving the problem of poor sealing caused by insufficient installation space for the stuffing box. The packing gland is used to compress the packing, making the gap between the packing and the agitator shaft smaller and improving the sealing effect. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model.

[0009] In the figure, 1-stirring shaft, 2-sunken stuffing box, 3-packing, 4-set bolt, 5-packing gland, 6-stirring vessel body, 7-vessel flange, 8-reducer mounting bracket, 9-reducer base plate. Detailed Implementation

[0010] The present invention will be further explained below with reference to the accompanying drawings.

[0011] like Figure 1 As shown, due to the installation position limitation of the power assembly (motor + reducer) of the stirring shaft 1, the space available for the stuffing box below the reducer base plate 9 is reduced, making it impossible to install a longer stuffing box, which in turn leads to a poorer sealing effect between the stirring shaft and the vessel body.

[0012] Therefore, this utility model discloses a submerged packing sealing device, including a mixing vessel body 6, a vessel mouth flange 7 installed at the top opening of the mixing vessel body 6, a submerged packing gland 2 fixedly connected to the vessel mouth flange 7 by set bolts 4, a mixing shaft 1 passing through the submerged packing gland 2 and extending into the mixing vessel body 6; a sealing cavity is formed between the mixing shaft 1 and the submerged packing gland 2, and the sealing cavity is filled with packing 3; a packing gland 5 is installed on the top of the submerged packing gland 2 by set bolts 4, the packing gland 5 is sleeved on the mixing shaft 1, and the fitting clearance between the packing gland 5 and the mixing shaft 1 is consistent with the fitting clearance between the submerged packing gland 2 and the mixing shaft 1, with the maximum clearance not exceeding 1.5mm, to avoid excessive clearance causing sealing failure.

[0013] This invention solves the problem of poor sealing caused by existing stuffing boxes being exposed outside the vessel body and limited by installation space, which prevent the filling of multiple rings of packing. The recessed stuffing box provides ample installation space for the packing, and the multiple layers of packing wrapped around the stirring shaft improve the sealing effect.

Claims

1. A sink filler seal apparatus, comprising: It includes the stirred tank body (6), the tank mouth flange (7) is installed on the top opening of the stirred tank body (6), the tank mouth flange (7) is fixedly connected with the sunken packing box (2) through bolt, the stirring shaft (1) is arranged in the sunken packing box (2), and the sealing cavity formed between the stirring shaft (1) and the sunken packing box (2) is filled with packing (3); the sunken packing box (2) is installed with the packing gland (5), and the packing gland (5) is arranged on the stirring shaft (1).

2. The subsea packing seal of claim 1, wherein, The cooperation gap between the sunken packing box (2) and the packing gland (5) and the stirring shaft (1) is not more than 1.5 mm.

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