CN209909167U

CN209909167U - Elastic air sealing device

Info

Publication number: CN209909167U
Application number: CN201920543298.9U
Authority: CN
Inventors: 杨志静; 郑宜洋
Original assignee: SHUANGLONG GROUP CO Ltd
Current assignee: SHUANGLONG GROUP CO Ltd
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-01-07
Anticipated expiration: 2029-04-19

Abstract

The utility model discloses an elastic air sealing device, elastic air sealing device includes: the gland assembly is used for being connected to the equipment end cover in a sealing mode, and an accommodating cavity is formed in one side, facing the main shaft, of the gland assembly; the sealing assembly is sleeved on the main shaft, is embedded in the accommodating cavity and forms an air cavity with the gland assembly; the gland assembly is provided with a vent hole connected with an external air source device, and the vent hole is communicated with the air cavity. The utility model adopts the air pressure sealing structure, so that the sealing component is tightly held by the main shaft under the action of air pressure, and the leakage of various powder media in the mixing process can be effectively prevented; the elastic air sealing device has the advantages of simple structure, long service life, convenience in maintenance, good sealing effect and the like.

Description

Elastic air sealing device

Technical Field

The utility model relates to a sealed technical field, in particular to elastic air sealing device.

Background

With the increasingly wide application of mixing equipment and the diversification of medium characteristics in various industries, the requirement on a sealing structure is higher and higher. The mixing of material mainly leans on the main shaft to drive agitating unit, because the main shaft needs to be connected with the outside drive arrangement of mixing apparatus, in order to avoid the material to reveal through the junction between main shaft and the mixing apparatus, need add on the equipment end cover of main shaft and mixing apparatus hookup location and establish a sealing device. The traditional sealing device is usually formed by a filler (also called packing) or a mechanical form, the filler is the earliest sealing device used in industry, is formed by weaving fibers such as cotton, hemp and the like, has small friction coefficient and poor heat conducting performance, is easy to leak particularly for a medium with extremely small particle fineness, and is inconvenient to operate and short in service life when being replaced and maintained after the filler is worn; the mechanical seal mainly depends on the end faces of a smooth and straight moving ring and a static ring, the moving ring and the static ring are mutually attached and move relatively by the pressure of an elastic component and a sealing medium, and a layer of extremely thin liquid film is maintained between the end faces to realize the seal.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an elastic air sealing device in order to overcome the defects of many parts and short service life of the sealing device in the prior art.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

an elastic air-tight seal, comprising:

the gland assembly is used for being connected to the equipment end cover in a sealing mode, and an accommodating cavity is formed in one side, facing the main shaft, of the gland assembly;

the sealing assembly is sleeved on the main shaft, is embedded in the accommodating cavity and forms an air cavity with the gland assembly;

the gland assembly is provided with a vent hole connected with an external air source device, and the vent hole is communicated with the air cavity.

In this scheme, adopt above-mentioned structural style, seal assembly installs in the holding intracavity of gland subassembly and is formed with the air cavity at the holding intracavity, and the main shaft passes seal assembly, exerts atmospheric pressure to inside air cavity through outside air supply device, and seal assembly and main shaft in close contact with under the effect of outside atmospheric pressure can effectively prevent the leakage of various powder body media at the mixing in-process, and this elasticity sealing device has advantages such as simple structure, maintenance convenience, sealed effectual.

Preferably, the gland subassembly includes mount pad, airtight gland, mount pad sealing connection in on the equipment end cover, airtight gland includes connecting portion and compresses tightly the portion, the one end of connecting portion with compress tightly a fixed connection, the other end of connecting portion with mount pad sealing connection, connecting portion compress tightly the portion and the mount pad encloses jointly and establishes formation the holding chamber, compress tightly the portion be used for with seal assembly presses on the mount pad.

In this scheme, adopt above-mentioned structural style, be sealing connection between mount pad and the equipment end cover and between mount pad and the airtight gland, can prevent effectively that the mixed material from revealing from the gap between mount pad and the equipment end cover, can guarantee moreover that the holding chamber between mount pad and the airtight gland can form the good air cavity of gas tightness, has strengthened sealed effect.

Preferably, the sealing assembly comprises a sealing ring and two sealing seats, the sealing ring is arranged between the two sealing seats in a pressing mode, a gap is reserved between the two sealing seats, and the two sealing seats are arranged between the pressing portion and the mounting seat.

In this scheme, adopt above-mentioned structural style, can form an air cavity that the gas tightness is good between seal assembly and the gland subassembly, the atmospheric pressure of outside air supply device can be acted on the sealing ring between two seal holders, gives the sealing ring a power towards the main shaft direction, makes the sealing ring closely support and leans on the main shaft.

Preferably, the outer peripheral surface of the sealing ring is provided with a convex ring part protruding outwards, and the convex ring part is arranged between the two sealing seats.

In this scheme, adopt above-mentioned structural style, the bulge loop portion of the outer peripheral face of sealing ring not only can increase and the seal receptacle between the contact surface, increase sealed effect, can also part two seal receptacles, make atmospheric pressure act on the sealing ring.

Preferably, the seal seat abuts against an outer peripheral surface of the seal ring for preventing the seal ring from rotating in the circumferential direction relative to the seal seat.

Preferably, one side of the sealing seat is provided with a concave platform matched with the outer ring of the sealing ring, and the concave platform is abutted against the peripheral surface of the sealing ring.

In this scheme, adopt above-mentioned structural style, install the outer lane of sealing ring in the concave station, can increase the contact surface between sealing ring and the seal receptacle, not only increase frictional force between the two, prevent that the sealing ring from rotating in circumference for the seal receptacle, can also increase the gas tightness.

Preferably, the abutting surface of the sealing ring and the concave platform is provided with a plurality of convex hulls, and the sealing seat is provided with a groove matched with the convex hulls.

In this scheme, adopt above-mentioned structural style, mutually supporting of convex closure and recess not only can prevent the sealing ring for the seal receptacle from rotating in circumference, can also increase the contact surface of sealing ring with the seal receptacle, has further increased the gas tightness of air cavity, can reach better sealed effect.

Preferably, one end of the sealing ring is provided with a clamping groove, the other end of the sealing ring is provided with a clamping block matched with the clamping groove, and the clamping block is connected to the clamping groove so that the sealing ring is annular.

In this scheme, adopt above-mentioned structural style, the sealing ring is long banding before the use, with the fixture block and the draw-in groove joint of sealing ring during the use, forms cyclic annular. The sealing ring with the structure is easy to process and convenient to install and replace.

Preferably, the mounting seat, the airtight gland and the sealing seat are all of split structures.

In this scheme, adopt above-mentioned structural style, make mount pad, airtight gland, seal receptacle can be installed after the assembly of other spare parts of equipment is accomplished, and it is convenient to maintain dismantlement and change.

The utility model discloses an actively advance the effect and lie in: the elastic air sealing device of the utility model adopts an air pressure sealing structure, the air cavity entering through air pressure generates pressure, and the sealing component is tightly held by the main shaft under the action of the air pressure, thus effectively preventing the leakage of various powder media in the mixing process; the elastic air sealing device has the advantages of simple structure, long service life, convenience in maintenance, good sealing effect and the like.

Drawings

Fig. 1 is a schematic structural diagram of an elastic air sealing device according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a mounting seat in an elastic airtight device according to a preferred embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a mounting seat in an elastic airtight device according to a preferred embodiment of the present invention.

Fig. 4 is a schematic structural view of the hermetic cover of the elastic hermetic package according to the preferred embodiment of the present invention.

Fig. 5 is a schematic structural view of the hermetic cover of the elastic hermetic package according to the preferred embodiment of the present invention.

Fig. 6 is a schematic structural view of a sealing ring in an elastic airtight device according to a preferred embodiment of the present invention.

Fig. 7 is a schematic structural view of a sealing seat in an elastic airtight device according to a preferred embodiment of the present invention.

Description of reference numerals:

main shaft 100

Device endcap 200

Mounting base 1

First annular groove 11

Second annular groove 12

First mounting screw 13

First alignment pin 14

Gas-tight gland 2

Connecting part 21

Pressing part 22

Second mounting screw 23

Second positioning pin 24

Sealing ring 3

Convex ring part 31

Convex hull 32

Latch 33

Sealing seat 4

Concave table 41

Groove 42

Third mounting screw 43

Air cavity 5

Vent hole 6

First seal ring 7

Second seal ring 8

Fixing screw 9

Detailed Description

The present invention is further illustrated by way of the following examples, which are not intended to limit the scope of the invention.

As shown in fig. 1 to 7, the elastic air sealing device according to the embodiment of the present invention includes a gland assembly and a sealing assembly, the gland assembly is used for being connected to the equipment end cover 200 in a sealing manner, and a side of the gland assembly facing the main shaft 100 has a receiving cavity; the sealing component is used for being sleeved on the main shaft 100, is embedded in the accommodating cavity and forms an air cavity 5 with the gland component; the gland component is provided with a vent hole 6 connected with an external air source device, and the vent hole 6 is communicated with the air cavity 5.

The sealing assembly is arranged in the containing cavity of the gland assembly and is provided with an air cavity 5 in the containing cavity, the main shaft 100 penetrates through the sealing assembly, air pressure is applied to the air cavity 5 inside through an external air source device, the sealing assembly is in close contact with the main shaft 100 under the action of the air pressure, leakage of various powder media in the mixing process can be effectively prevented, and the elastic air sealing device has the advantages of simple structure, convenience in maintenance, good sealing effect and the like.

The gland assembly comprises an installation seat 1 and an airtight gland 2, a first annular groove 11 and a second annular groove 12 surrounding the main shaft 100 are formed in the contact surfaces of the upper end surface and the lower end surface of the installation seat 1, the airtight gland 2 and the equipment end cover 200, a first sealing ring 7 and a second sealing ring 8 are respectively arranged in the first annular groove 11 and the second annular groove 12, the installation seat 1 and the equipment end cover 200 are connected in a sealing mode through the second sealing ring 8, and materials are effectively prevented from leaking between the installation seat 1 and the equipment end cover 200; the airtight gland 2 comprises a connecting part 21 and a pressing part 22, one end of the connecting part 21 is fixedly connected with the pressing part 22, and the contact surface of the connecting part 21 and the mounting seat 1 is hermetically connected through a first sealing ring 7, so that the air chamber 5 can be prevented from pressure leakage when air is introduced, and the airtight effect of the air chamber 5 is prevented from being influenced; the connecting portion 21, the pressing portion 22 and the mounting seat 1 are arranged to form an accommodating cavity, and the pressing portion 22 is used for pressing the sealing assembly on the mounting seat 1 in the accommodating cavity.

The sealing assembly comprises a sealing ring 3 and two sealing seats 4, the sealing ring 3 is pressed between the two sealing seats 4, a gap is reserved between the two sealing seats 4, and the two sealing seats 4 are arranged between a pressing part 22 and the mounting seat 1. In this embodiment, the sealing ring 3 is made of a silica gel material with good elastic deformation and wear resistance, the sealing seat 4 is made of a polytetrafluoroethylene material, the airtight gland 2 and the mounting seat 1 are fixed on the end cover 200 of the device by the fixing screws 9 during installation, and thus the two sealing seats 4 in the accommodating cavity extrude the sealing ring 3 under the action of external pressure and are tightly combined with the pressing part 22 of the airtight gland 2 and the mounting seat 1 to form an air cavity 5 with good air tightness.

In this embodiment, there is one sealing assembly, but two or more sealing assemblies may be selected to achieve better sealing effect.

The outer peripheral surface of the sealing ring 3 is provided with a convex ring part 31 protruding outwards, and the convex ring part 31 is arranged between the two sealing seats 4. Convex ring portion 31 constitutes air cavity 5 with two seal receptacle 4, mount pad 1 and airtight gland 2 jointly, and atmospheric pressure in the air cavity 5 mainly acts on convex ring portion 31 to make sealing ring 3 and main shaft 100 in close contact with, reach better sealed effect.

The seal holder 4 abuts against the outer peripheral surface of the seal ring 3 for preventing the seal ring 3 from rotating in the circumferential direction relative to the seal holder 4. In the present embodiment, one side of the two sealing seats 4 is provided with a concave platform 41 matched with the outer ring of the sealing ring 3, and the concave platform 41 is abutted against the outer circumferential surface of the sealing ring 3. The outer ring of the sealing ring 3 is arranged in the concave table 41, so that the contact surface between the sealing ring 3 and the sealing seat 4 can be increased, the friction force between the sealing ring 3 and the sealing seat 4 is increased, the sealing ring 3 is prevented from rotating in the circumferential direction relative to the sealing seat 4, and the air tightness can be increased.

The peripheral face that sealing ring 3 and concave station 41 butt joint is equipped with a plurality of arc convex closure 32, is equipped with the arc recess 42 with arc convex closure 32 complex on seal receptacle 4. The arrangement of the convex hull 32 and the groove 42 can not only prevent the sealing ring 3 from rotating in the circumferential direction relative to the sealing seat 4, but also increase the contact surface between the sealing ring 3 and the sealing seat 4, further increase the air tightness of the air cavity 5, and achieve better sealing effect.

As shown in fig. 6, one end of the sealing ring 3 is provided with a clamping groove (not labeled), the other end of the sealing ring 3 is provided with a clamping block 33 matched with the clamping groove, and the clamping block 33 is connected to the clamping groove, so that the sealing ring 3 is in a ring shape. The sealing ring 3 is in a long strip shape before use, and the clamping block 33 is clamped with the clamping groove to form an annular shape when in use. The sealing ring 3 with the structure is easy to process and convenient to install and replace.

The mounting base 1 is a split structure and is formed by combining a plurality of components, as shown in fig. 2 and fig. 3, in this embodiment, the mounting base 1 is composed of two semicircular components, a positioning pin hole for mounting and positioning and a mounting screw threaded hole for mounting and fixing are respectively arranged at the joint of the two semicircular components, during mounting, the two semicircular components are positioned by a first positioning pin 14, and then the two semicircular components are combined into a complete mounting base 1 by a first mounting screw 13. The mounting base 1 is also provided with a fixing screw threaded hole corresponding to the threaded hole on the equipment end cover 200, and the fixing screw threaded hole is fixed on the equipment end cover 200 through a fixing screw 9.

As shown in fig. 4 and 5, the gas-tight gland 2 is also composed of two semi-ring parts, and a connecting portion 21 of the gas-tight gland 2 at the joint of the two semi-ring parts is provided with a positioning pin hole for mounting and positioning and a mounting screw threaded hole for mounting and fixing, when mounting, the two semi-ring parts are positioned by the second positioning pin 24, and then the two semi-ring parts are combined into a complete gas-tight gland 2 by the second mounting screw 23. The airtight gland 2 is also provided with a fixing screw threaded hole corresponding to the fixing screw threaded hole on the mounting seat 1 and is fixed on the mounting seat 1 through a fixing screw 9.

As shown in fig. 7, the sealing seat 4 is also composed of two semi-annular parts, which are combined into a complete sealing seat 4 by the third mounting screws 43.

Foretell mount pad 1, airtight gland 2, seal receptacle 4 adopt split type structure to install, and it is more convenient when maintaining, convenient to detach and installation.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. An elastic air-tight seal, comprising:

2. The elastic air-tight sealing device according to claim 1, wherein the gland assembly includes a mounting seat and an air-tight gland, the mounting seat is connected to the equipment end cap in a sealing manner, the air-tight gland includes a connecting portion and a pressing portion, one end of the connecting portion is fixedly connected to the pressing portion, the other end of the connecting portion is connected to the mounting seat in a sealing manner, the connecting portion, the pressing portion and the mounting seat together enclose the accommodating cavity, and the pressing portion is used for pressing the sealing assembly on the mounting seat.

3. The elastic air sealing device according to claim 2, wherein the sealing assembly comprises a sealing ring and two sealing seats, the sealing ring is pressed between the two sealing seats, a gap is left between the two sealing seats, and the two sealing seats are both arranged between the pressing portion and the mounting seat.

4. The elastic air seal device of claim 3, wherein said sealing ring has an outwardly protruding collar portion on its outer circumferential surface, said collar portion being disposed between said two sealing seats.

5. The elastic air seal device of claim 3, wherein the seal seat abuts against an outer circumferential surface of the seal ring for preventing the seal ring from rotating in a circumferential direction relative to the seal seat.

6. The elastic air seal device of claim 5, wherein one side of the seal seat is provided with a recessed platform which is matched with the outer ring of the seal ring, and the recessed platform is abutted against the outer circumferential surface of the seal ring.

7. The elastic air sealing device according to claim 6, wherein the abutting surface of the sealing ring and the concave platform is provided with a plurality of convex hulls, and the sealing seat is provided with a groove matched with the convex hulls.

8. The elastic air-tight sealing device according to claim 3, wherein one end of the sealing ring is provided with a slot, and the other end of the sealing ring is provided with a block fitting with the slot, and the block is connected to the slot so as to form the sealing ring into a ring shape.

9. The elastic air sealing device of claim 8, wherein said mounting seat, said air sealing gland and said sealing seat are all of a split structure.