CN210623565U

CN210623565U - External sealing structure of lower frame of coal mill

Info

Publication number: CN210623565U
Application number: CN201921262909.9U
Authority: CN
Inventors: 潘宁
Original assignee: Hebei Wuyi Machinery Manufacturing Co ltd
Current assignee: Hebei Wuyi Machinery Manufacturing Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-05-26
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses a coal pulverizer undercarriage body outer seal structure, including lower support body, the seal receptacle is installed to the lower extreme of lower support body, is provided with sealed the pad between seal receptacle and the lower support body, rotates between lower support body and the seal receptacle and is connected with the transmission shaft, and sealed piece is installed to the inboard of seal receptacle, and the lower extreme butt of sealed piece has the change lid, and the surface of changing the lid is provided with the handle, changes the inboard of installing at the seal receptacle of lid, and the upper end butt of sealed piece has the butt ring. This kind of external seal structure of coal pulverizer undercarriage, it is inboard to peg graft the inserting groove through the grafting piece between the sealed piece on transmission shaft surface, and the connecting pin is pegged graft the inboard of spread groove and the inboard of arc rubber piece grafting to the depressed groove and is accomplished the connection between the sealed piece, does not have direct clearance between the sealed piece, has improved the leakproofness of the external atmoseal of coal pulverizer undercarriage.

Description

External sealing structure of lower frame of coal mill

Technical Field

The utility model relates to a coal pulverizer seals technical field, specifically is a coal pulverizer undercarriage body outer seal structure.

Background

The medium speed coal mill is an important auxiliary device of a thermal power plant, and the running condition of the medium speed coal mill directly influences the safety, stability and economy of a unit. If the sealing performance of the air seal outside the lower frame body of the medium-speed coal mill is not good, air leakage and powder leakage can be caused, if the medium-speed coal mill is not processed in time, a large amount of stone coal is sprayed out from the bottom of the transmission disc even sparks emerge, and the speed reducer and the hydraulic cylinder are also buried by the large amount of stone coal, so that the operation safety of equipment is seriously threatened, even the production environment is polluted, and the health of operators is influenced.

The outer atmoseal of the lower carriage of current medium speed pulverizer adopts the sealing ring to seal, and the outer atmoseal sealing ring of lower carriage comprises the concatenation of polylith curved sealed piece, has the clearance between the adjacent sealed piece, and it is not good to lead to the outer atmoseal sealed effect of medium speed pulverizer lower carriage, and the change of sealed piece is very inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coal pulverizer undercarriage body outer seal structure to solve the sealed poor problem of effect of undercarriage body transmission shaft department.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a coal pulverizer undercarriage body outer seal structure, includes lower support body, the seal receptacle is installed to the lower extreme of support body down, be provided with sealed the pad between seal receptacle and the lower support body, it is connected with the transmission shaft to rotate between lower support body and the seal receptacle, sealed piece is installed to the inboard of seal receptacle, the lower extreme butt of sealed piece has the change lid, the surface of changing the lid is provided with the handle, the inboard at the seal receptacle of installing of changing the lid, the upper end butt of sealed piece has connect the butt ring.

Preferably, the surface of one end of the sealing block is symmetrically provided with a connecting pin and an inserting groove, the inner wall of the inserting groove is symmetrically provided with an arc-shaped rubber block, the surface of the other end of the sealing block is symmetrically provided with a connecting groove and an inserting block, and the symmetrical surface of the inserting block is provided with a concave groove.

Preferably, the inside surface symmetry of seal receptacle is provided with the sliding tray, and the inboard sliding connection of sliding tray has the bracing piece, and the lower extreme welding of bracing piece has the butt ring, installs the spring between bracing piece and the sliding tray inner wall.

Preferably, the lower surface of the abutting ring is provided with a first sealing ring, the surface of the first sealing ring abuts against a sealing block, the surface of the abutting ring is provided with a second sealing ring, and the surface of the second sealing ring abuts against the inner wall of the sealing seat.

Preferably, the connecting pin corresponds to the connecting groove, the inserting groove corresponds to the inserting block, and the arc-shaped rubber block corresponds to the recessed groove.

Compared with the prior art, the beneficial effects of the utility model are that: according to the external sealing structure of the lower frame body of the coal mill, firstly, sealing blocks on the surface of a transmission shaft are inserted into the inner side of an insertion groove through insertion blocks, a connecting pin is inserted into the inner side of the connection groove, an arc-shaped rubber block is inserted into the inner side of a concave groove to complete connection between the sealing blocks, no through gap exists between the sealing blocks, and the sealing performance of the external air seal of the lower frame body of the coal mill is improved; second, because sealed piece assembles the back along the transmission shaft, through changing the lid along the inboard threaded connection of the inboard sealing receptacle of sealing receptacle, make the sealed piece make progress butt ring, when needing to change sealed piece, will change the lid and lift off along the sealing receptacle rotation, the lower extreme of sealed piece will lose the butt, elasticity through the spring promotes the bracing piece and will drive the butt ring and support the sealed piece downwards from the inboard of sealing receptacle and go out to the change of convenient sealed piece.

Drawings

FIG. 1 is a sectional view of the overall structure of the present invention;

fig. 2 is a schematic view of the sealing block of the present invention;

fig. 3 is a top view of the butt ring of the present invention.

In the figure: 1 lower support body, 2 seal receptacle, 21 sliding tray, 22 spring, 23 change lid, 24 handles, 25 sealed pad, 3 sealed pieces, 31 connecting pin, 32 inserting groove, 33 arc rubber piece, 34 connecting groove, 35 inserting block, 36 depressed groove, 4 butt rings, 41 second sealing washer, 42 bracing pieces, 43 first sealing washer, 5 transmission shafts.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, an external sealing structure of a coal mill lower frame comprises a lower frame body 1, a sealing seat 2 is installed at the lower end of the lower frame body 1, the sealing seat 2 is fixed on the lower end surface of the lower frame body 1 through bolts, a sealing gasket 25 is arranged between the sealing seat 2 and the lower frame body 1, the lower frame body 1 and the sealing seat 2 are sealed through the sealing gasket 25, a transmission shaft 5 is rotatably connected between the lower frame body 1 and the sealing seat 2, a sealing block 3 is installed at the inner side of the sealing seat 2, after a replacing cover 23 is spirally dismounted from the inner side of the sealing seat 2, the sealing block 3 is assembled along the surface of the transmission shaft 5, the replacing cover 23 is upwards abutted to push the sealing block 3 into the inner side of the sealing seat 2, a replacing cover 23 is abutted to the lower end of the sealing block 3, a handle 24 is arranged on the surface of the replacing cover 23, the replacing cover 23 is conveniently rotated through the handle 24, the lower extreme inner wall of seal receptacle 2 is provided with the screw thread, changes lid 23 and installs at the lower extreme inboard of seal receptacle 2 through threaded connection's mode, and the upper end butt of sealed piece 3 has connect butt ring 4.

Referring to fig. 2, a connecting pin 31 and a plugging groove 32 are symmetrically arranged on one end surface of the sealing block 3, two connecting pins 31 are arranged on one end of the sealing block 3, an arc-shaped rubber block 33 is symmetrically arranged on the inner wall of the plugging groove 32, a connecting groove 34 and a plugging block 35 are symmetrically arranged on the other end surface of the sealing block 3, the connecting groove 34 is two cylindrical grooves, a recessed groove 36 is arranged on the symmetrical surface of the plugging block 35, and the recessed radian of the recessed groove 36 is consistent with that of the arc-shaped rubber block 33.

Referring to fig. 1, the inner side surface of the seal seat 2 is symmetrically provided with 4 sliding grooves 21, the number of the sliding grooves 21 is 4, the sliding grooves are uniformly arranged on the inner side surface of the seal seat 2, the inner side of the sliding groove 21 is slidably connected with a support rod 42, the lower end of the support rod 42 is welded with an abutting ring 4, a spring 22 is installed between the support rod 42 and the inner wall of the sliding groove 21, and the support rod 42 is pushed downwards by the elastic force of the spring 22 to push out the seal block 3 from the inner side of the seal seat 2 by using the abutting ring 4.

Referring to fig. 1 and 3, a first sealing ring 43 is disposed on a lower surface of the abutting ring 4, the first sealing ring 43 is adhered to the lower surface of the abutting ring 4, a sealing block 3 abuts against a surface of the first sealing ring 43, a connection gap between an upper surface of the sealing block 3 and the abutting ring 4 is sealed by the first sealing ring 43 abutting against the sealing block 3, a second sealing ring 41 is disposed on the surface of the abutting ring 4, the second sealing ring 41 is adhered to the upper surface of the abutting ring 4, an inner wall of the seal seat 2 abuts against a surface of the second sealing ring 41, and the connection gap between the abutting ring 4 and the seal seat 2 is sealed by the second sealing ring 41 abutting against an inner side of the seal seat 2.

Referring to fig. 2, the connecting pin 31 corresponds to the connecting groove 34, the connecting pin 31 is correspondingly inserted into the inner side of the connecting groove 34 of the adjacent sealing block 3, the inserting groove 32 corresponds to the inserting block 35, the inserting block 35 is correspondingly inserted into the inner side of the inserting groove 32 of the adjacent sealing block 3, so that no through gap exists at the joint between the sealing blocks 3, the arc-shaped rubber block 33 corresponds to the recessed groove 36, the arc-shaped rubber block 33 is correspondingly inserted into the inner side of the recessed groove 36 of the adjacent sealing block 3, so that no through gap exists in the transverse connecting gap between the sealing blocks 3, the sealing blocks 3 are inserted into the inner side of the inserting groove 32 through the inserting block 35, the connecting pin 31 is inserted into the inner side of the connecting groove 34, and the arc-shaped rubber block 33 is inserted into the inner side of the recessed groove 36.

The utility model discloses when concrete implementation: because the connecting pin 31 corresponds to the connecting groove 34, the inserting groove 32 corresponds to the inserting block 35, and the arc-shaped rubber block 33 corresponds to the recessed groove 36, the sealing blocks 3 on the surface of the transmission shaft 5 are inserted into the inner side of the inserting groove 32 through the inserting block 35, the connecting pin 31 is inserted into the inner side of the connecting groove 34, and the arc-shaped rubber block 33 is inserted into the inner side of the recessed groove 36 to complete the connection between the sealing blocks 3, and after the sealing blocks 3 are connected, no straight-through gap exists between the vertical surface and the horizontal surface between the sealing blocks 3, so that the sealing performance of the outer seal of the lower frame body 1 of the coal mill is improved; because enclose the circle after along the equipment of transmission shaft 5 between the sealed piece 3, through changing the inboard of lid 23 along 2 inboard threaded connection of seal receptacle with its crowded seal receptacle 2, make sealed piece 3 upwards butt ring 4 be bracing piece 42 along sliding tray 21 inwards move thereby accomplish the sealed between butt ring 4 and seal receptacle 2 with the second sealing washer 41 butt of butt ring 4 to the inner wall of seal receptacle 2, when needing to change sealed piece 3, will change lid 23 and lift off along the rotation of seal receptacle 2, the lower extreme of sealed piece 3 will lose ascending effort, thereby will promote bracing piece 42 through the elasticity of spring 22 and drive butt ring 4 and downwards support sealed piece 3 from the inboard of seal receptacle 2, in order to make things convenient for the change of sealed piece 3.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a coal pulverizer undercarriage body outer seal structure, includes undercarriage body (1), its characterized in that: seal receptacle (2) are installed to the lower extreme of lower support body (1), be provided with sealed pad (25) between seal receptacle (2) and the lower support body (1), it is connected with transmission shaft (5) to rotate between lower support body (1) and seal receptacle (2), sealed piece (3) are installed to the inboard of seal receptacle (2), the lower extreme butt joint of sealed piece (3) has change lid (23), the surface of changing lid (23) is provided with handle (24), the inboard in seal receptacle (2) of installing of changing lid (23), the upper end butt joint of sealed piece (3) has butt ring (4).

2. The external sealing structure of the lower frame body of the coal mill as claimed in claim 1, wherein: the sealing structure is characterized in that a connecting pin (31) and an inserting groove (32) are symmetrically arranged on the surface of one end of the sealing block (3), an arc-shaped rubber block (33) is symmetrically arranged on the inner wall of the inserting groove (32), a connecting groove (34) and an inserting block (35) are symmetrically arranged on the surface of the other end of the sealing block (3), and a concave groove (36) is formed in the symmetrical surface of the inserting block (35).

3. The external sealing structure of the lower frame body of the coal mill as claimed in claim 1, wherein: the inner side surface of the sealing seat (2) is symmetrically provided with sliding grooves (21), the inner side of each sliding groove (21) is connected with a supporting rod (42) in a sliding mode, the lower end of each supporting rod (42) is welded with a butting circular ring (4), and a spring (22) is installed between each supporting rod (42) and the inner wall of each sliding groove (21).

4. The external sealing structure of the lower frame body of the coal mill as claimed in claim 1, wherein: the lower surface of butt ring (4) is provided with first sealing washer (43), and the surface butt of first sealing washer (43) has sealed piece (3), the surface of butt ring (4) is provided with second sealing washer (41), and the surface butt of second sealing washer (41) has seal receptacle (2) inner wall.

5. The external sealing structure of the lower frame body of the coal mill as claimed in claim 2, wherein: the connecting pin (31) corresponds to the connecting groove (34), the inserting groove (32) corresponds to the inserting block (35), and the arc-shaped rubber block (33) corresponds to the concave groove (36).