CN217736263U

CN217736263U - Air seal sealing device in lower frame body of medium-speed coal mill

Info

Publication number: CN217736263U
Application number: CN202220721178.5U
Authority: CN
Inventors: 张显铭; 李连琨; 赵鸿雁
Original assignee: Dandong Power Plant of Huaneng International Power Co Ltd
Current assignee: Dandong Power Plant of Huaneng International Power Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-11-04
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses an internal atmoseal sealing device of medium speed pulverizer undercarriage relates to the coal pulverizer field, including the drive plate, the smart sealing ring of charcoal is installed to the surface below of drive plate, and the atmoseal go-between in the top of the smart sealing ring of charcoal is installed through first construction bolt, and four external seal rings are installed through a plurality of second construction bolts to the outer wall of interior atmoseal go-between. The utility model discloses a be provided with seal assembly, when the clearance between internal atmoseal go-between and external seal ring is sealed up to needs, user's accessible turning handle rotates the carousel, can drive the screw rod after the carousel rotates and rotate, the screw rod can drive the cam rotation after rotating, it moves down to promote the slide after the cam rotation, can drive connecting rod and sealing washer after the slide moves down and move down, so that the sealing washer card is gone into to the inside of notch, in order to realize the sealed between drive plate and the external seal ring, prevent to have great clearance to produce between drive plate and external seal ring, the leakproofness between drive plate and external seal ring has been improved.

Description

Air seal sealing device in lower frame body of medium-speed coal mill

Technical Field

The utility model relates to a coal pulverizer field specifically is an internal atmoseal sealing device of medium speed coal pulverizer undercarriage.

Background

The medium speed coal mill is an important auxiliary equipment of a thermal power plant, the running condition of the medium speed coal mill directly influences the safety, stability and economy of a unit, the medium speed coal mill is a machine for crushing and grinding coal blocks into coal powder, the medium speed coal mill is an important auxiliary equipment of a coal powder furnace, the coal mill is of a vertical type pulverizer, a high-pressure suspension roller mill, a medium speed micro powder mill, an overpressure trapezoid mill, a Raymond mill and the like, and because an air seal sealing surface in a lower frame body of the medium speed coal mill is easy to wear after long-time running, the gap between an inner air seal and a sealing surface of a transmission disc is gradually increased, the air pressure of sealing air in a sealing cavity of the lower frame body is insufficient, and finally the air seal in the lower frame body of the medium speed coal mill loses the sealing performance.

The utility model discloses a gas seal sealing device in a lower frame body of a medium speed coal mill according to the Chinese patent with the publication number of CN204512435U, which can adjust the gap between the sealing surface of an adjusting ring and the sealing surface of a transmission disc at any time, and has the advantages of good sealing performance, convenient maintenance, low maintenance cost and convenient implementation; because a certain gap is formed between the adjusting ring and the transmission disc in the utility model, and the gap is difficult to be blocked, the sealing performance between the transmission disc and the adjusting ring is poor, and the use effect of the transmission disc is reduced; meanwhile, when the adjusting ring is installed through the bolt, the adjusting ring can move, so that the bolt hole in the adjusting ring is difficult to align with the bolt hole in the inner air seal connecting ring, a user is difficult to fast screw the bolt into the corresponding bolt hole, and the installation efficiency of the adjusting ring is reduced.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing an internal atmoseal sealing device of medium speed coal pulverizer undercarriage to solve the relatively poor and inconvenient technical problem who installs the adjusting ring fast of leakproofness between driving disc and adjusting ring.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an internal gas seal sealing device of middling speed coal pulverizer undercarriage, includes the drive plate, the charcoal essence sealing ring is installed to the surface below of drive plate, the top of charcoal essence sealing ring is installed interior gas seal go-between through first construction bolt, four external seal rings are installed through a plurality of second construction bolts to the outer wall of interior gas seal go-between, be provided with spacing subassembly between interior gas seal go-between and the external seal ring, the notch has been seted up at the top of external seal ring, the bottom of drive plate is provided with seal assembly all around, be provided with sealed wind cavity between interior gas seal go-between and the drive plate.

Through adopting above-mentioned technical scheme, the internal atmoseal go-between can be fixed to first construction bolt, and the setting of second construction bolt can make the outer seal ring install the outer wall at the carbon sealing ring.

Further, seal assembly is including seting up in driving plate bottom cavity all around, the bearing is installed to inside one side of cavity, the one end of bearing is connected with the screw rod that extends to the driving plate outside, the one end of screw rod is fixed with the carousel, the cam has been cup jointed to the outer wall of screw rod, the spout has all been seted up to the both sides of cavity, two be provided with the slide between the spout, the inside below of spout is fixed with reset spring, the bottom of slide is fixed with a plurality of connecting rods, the bottom mounting of connecting rod has the sealing washer.

Through adopting above-mentioned technical scheme, when the clearance between needs sealed to drive plate and the external seal ring, user's accessible carousel rotated the cam for the slide drives the sealing washer and moves down, can make the sealing washer card go into to the inside of notch then.

Furthermore, reset spring's top is connected with the slide, sealing washer and connecting rod all pass through slide and spout sliding connection.

Through adopting above-mentioned technical scheme, the slide can drive connecting rod and sealing washer after moving down and move down to make the inside of sealing washer card income to the notch, in order to realize the sealed between drive plate and the external seal ring.

Further, the cam is located directly over the sliding plate, a rotating handle is fixed above one side of the rotating disc, the screw is in threaded connection with the transmission disc, the sealing ring is located directly over the notch, and the sealing ring is matched with the notch.

By adopting the technical scheme, a user can rotate the rotary table through the rotary handle, the rotary table can drive the screw rod to rotate after rotating, the cam can be driven to rotate after the screw rod rotates, and the sliding plate is pushed to move downwards after the cam rotates; meanwhile, the sealing ring can be conveniently moved into the notch or moved out of the notch, so that a gap between the outer sealing ring and the transmission disc can be blocked, and the sealing performance of the transmission disc is improved.

Further, spacing subassembly is including being fixed in a plurality of reference columns of external seal ring one side and seting up in inside a plurality of constant head tanks and the recess of interior gas seal go-between, the spacing groove has all been seted up to the top and the bottom of reference column, the inside of recess is fixed with the spring, the bottom of spring is connected with the movable block, the spacing lug that extends to the spacing inslot portion is installed to the bottom of movable block.

Through adopting above-mentioned technical scheme, when the reference column immigration to the constant head tank inside, spacing lug receives the extrusion can move in to the inside of recess, and spacing lug can promote the movable block and remove to make the movable block extrusion spring, after spacing groove on the reference column aligns with spacing lug, the spring resumes elasticity and tensile then can promote spacing lug and move in to spacing inslot portion, thereby can be spacing to the reference column, improve its stability.

Furthermore, the quantity of recess is the twice of constant head tank, the reference column is located the inside of constant head tank, reference column and constant head tank looks adaptation.

Through adopting above-mentioned technical scheme, the reference column can shift into to the inside of constant head tank or shift out in the reference column, and the setting of reference column can make the bolt hole on interior air seal go-between align with the bolt hole on the external seal ring to can carry out spacing fixed to the external seal ring then in with second mounting bolt screw in to the bolt hole.

Furthermore, the limiting bump is matched with the limiting groove, the limiting bump is connected with the groove in a sliding mode through the movable block, and the diameter of the limiting bump is smaller than that of the groove.

By adopting the technical scheme, the limiting convex block can be moved into the limiting groove so as to limit the positioning column and prevent the positioning column from being moved out of the positioning groove at will.

To sum up, the utility model discloses mainly have following beneficial effect:

1. the utility model discloses a be provided with seal assembly, when the clearance between internal atmoseal go-between and the outer seal ring need be sealed, the user can rotate the carousel through the turning handle, can drive the screw rod after the carousel rotates and rotate, can drive the cam after the screw rod rotates and rotate, the cam promotes the slide and moves down after rotating, can drive connecting rod and sealing washer after the slide moves down and move down, so that the sealing washer card is gone into to the inside of notch, in order to realize the sealing between drive plate and the outer seal ring, prevent to have great clearance to produce between drive plate and the outer seal ring, have improved the leakproofness between drive plate and the outer seal ring then, and then improved the result of use of transmission and coal pulverizer;

2. the utility model discloses a be provided with spacing subassembly, when installing the external seal ring, can be with reference column immigration on the external seal ring to the constant head tank inside, limit lug receives the extrusion and can move into to the inside of recess this moment, and limit lug can promote the movable block and remove, so that movable block extrusion spring, after spacing groove and limit lug align on the reference column, the spring resumes elasticity and tensile can promote then that limit lug moves into to the spacing inslot portion, thereby can be spacing to the reference column, improve its stability, make interior gas seal go-between and external seal ring can laminate together completely, and make bolt hole on the interior gas seal go-between and the bolt hole on the external seal ring can align, so that with the quick screw in of second construction bolt to corresponding bolt hole, thereby the fixed efficiency of external seal ring has been improved, prevent that the external seal ring from taking place to remove in the installation.

Drawings

FIG. 1 is a schematic view of the overall front-cut structure of the present invention;

fig. 2 is a schematic view of the three-dimensional structure of the outer sealing ring of the present invention;

fig. 3 is a schematic view of the three-dimensional structure of the sealing ring of the present invention;

fig. 4 is a schematic view of a three-dimensional structure of the cam of the present invention;

fig. 5 is an enlarged view of a portion a of fig. 1 according to the present invention;

fig. 6 is an enlarged view of the point B in fig. 1 according to the present invention.

In the figure: 1. a drive plate; 2. a carbon sealing ring; 3. an inner air seal connecting ring; 4. an outer seal ring; 5. a first mounting bolt; 6. a second mounting bolt; 7. a notch; 8. a seal assembly; 801. a cavity; 802. a bearing; 803. a cam; 804. a screw; 805. a turntable; 806. a slide plate; 807. a chute; 808. a return spring; 809. a connecting rod; 810. a seal ring; 9. a limiting component; 901. a groove; 902. a spring; 903. a movable block; 904. a limiting bump; 905. a limiting groove; 906. positioning a groove; 907. a positioning column; 10. the air chamber is sealed.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The following describes an embodiment of the present invention according to its overall structure.

A gas seal sealing device in a lower frame of a medium speed coal mill is disclosed, as shown in figure 1, figure 2 and figure 6, and comprises a transmission disc 1, a carbon seal ring 2 is arranged below the outer surface of the transmission disc 1, an inner gas seal connecting ring 3 is arranged at the top of the carbon seal ring 2 through a first mounting bolt 5, four outer seal rings 4 are arranged on the outer wall of the inner gas seal connecting ring 3 through a plurality of second mounting bolts 6, the inner gas seal connecting ring 3 can be fixed through the first mounting bolt 5, an outer seal ring 7 can be arranged on the outer wall of the carbon seal ring 2 through the arrangement of the second mounting bolts 6, a limit component 9 is arranged between the inner gas seal connecting ring 3 and the outer seal ring 4, the limit component 9 comprises a plurality of positioning columns 907 fixed on one side of the outer seal ring 4, a plurality of positioning grooves 906 and grooves 901 arranged inside the carbon seal connecting ring 3, and limit grooves 905 are arranged at the top and the bottom of the positioning columns 907, the number of the grooves 901 is twice of that of the positioning grooves 906, the positioning columns 907 are positioned inside the positioning grooves 906, the positioning columns 907 are matched with the positioning grooves 906, springs 902 are fixed inside the grooves 901, movable blocks 903 are connected to the bottom ends of the springs 902, when the positioning columns 907 are moved into the positioning grooves 906, the limiting lugs 904 are extruded to move into the grooves 901, the limiting lugs 904 push the movable blocks 903 to move, so that the movable blocks 903 squeeze the springs 902, when the limiting grooves 905 on the positioning columns 907 are aligned with the limiting lugs 904, the springs 902 recover elasticity and stretch, the limiting lugs 904 can be pushed to move into the limiting grooves 905, the positioning columns 907 can be limited, the limiting lugs 904 extending into the limiting grooves 905 are installed at the bottoms of the movable blocks 903, spacing lug 904 and spacing groove 905 looks adaptation, spacing lug 904 passes through movable block 903 and recess 901 sliding connection, the diameter of spacing lug 904 is less than the diameter of recess 901, can make spacing lug 904 immigration to spacing inslot 905 inside to it is spacing to reference column 907, notch 7 has been seted up at the top of outer seal ring 4, the bottom of driving disk 1 is provided with seal assembly 8 all around, be provided with sealed air cavity 10 between interior airtight go-between 3 and the driving disk 1.

Referring to fig. 1, 3, 4 and 5, the sealing assembly 8 includes a cavity 801 disposed around the bottom of the transmission disc 1, a bearing 802 is installed on one side inside the cavity 801, one end of the bearing 802 is connected with a screw 804 extending to the outside of the transmission disc 1, one end of the screw 804 is fixed with a turntable 805, the outer wall of the screw 804 is sleeved with a cam 803, two sides of the cavity 801 are both provided with sliding grooves 807, a sliding plate 806 is disposed between the two sliding grooves 807, a return spring 808 is fixed below the inside of the sliding groove 807, the top end of the return spring 808 is connected with the sliding plate 806, a sealing ring 810 and a connecting rod 809 are both slidably connected with the sliding grooves 807 through the sliding plate 806, the sliding plate 806 moves down to drive the connecting rod 809 and the sealing ring 810 to move down, the cam 803 is located right above the sliding plate 806, a rotating handle is fixed above one side of the turntable 805, the screw 804 is in threaded connection with the transmission disc 1, a user can rotate the rotary disc 805 through the rotary handle, the rotary disc 805 can drive the screw 804 to rotate after rotating, the screw 804 can drive the cam 803 to rotate after rotating, the cam 803 pushes the sliding plate 806 to move downwards after rotating, a plurality of connecting rods 809 are fixed at the bottom of the sliding plate 806, when a gap between the transmission disc 1 and the outer sealing ring 4 needs to be sealed, the user can rotate the cam 803 through the rotary disc 805 to enable the sliding plate 806 to drive the sealing ring 810 to move downwards, the sealing ring 810 can be clamped into the groove 7, the sealing ring 810 is fixed at the bottom end of the connecting rod 809, the sealing ring 810 is located right above the groove 7, the sealing ring 810 is matched with the groove 7, the sealing ring 810 can be conveniently moved into the groove 7 or moved out of the groove 7, and therefore the gap between the outer sealing ring 4 and the transmission disc 1 can be sealed.

The implementation principle of the embodiment is as follows: firstly, a user can install the inner air seal connecting ring 3 on the carbon fine seal ring 2 through the first installation bolt 5, then when installing the outer seal ring 4, the positioning column 907 on the outer seal ring can be moved into the positioning groove 906, at the moment, the limiting lug 904 is extruded and moved into the groove 901, and the limiting lug 904 can push the movable block 903 to move, so that the movable block 903 can extrude the spring 902, after the limiting groove 905 on the positioning column 907 is aligned with the limiting lug 904, the spring 902 recovers elasticity and stretches and can push the limiting lug 904 to move into the limiting groove 905, so that the positioning column 907 can be limited, at the moment, the bolt hole on the inner air seal connecting ring 3 can be aligned with the bolt hole on the outer seal ring 4, then the second installation bolt 6 can be quickly screwed into the corresponding bolt hole, so as to fix the outer seal ring 4, then the user rotates the rotating disc 805 through the rotating handle, the rotating disc 805 can drive the screw 804 to rotate, the screw 803 can drive the rotation, the rotation of the screw 803 can drive the outer seal ring 803, the rotation of the outer seal ring can drive the sliding plate 806, the sliding plate 806 can be moved downwards, the sliding plate and the sealing ring 810 can be clamped into the groove opening of the transmission disc 810, so that a gap between the inner seal ring 810 and the sealing ring 810 can be prevented from being generated, and the gap between the outer seal ring 4 is formed.

Although embodiments of the present invention have been shown and described, it is intended that the present embodiments be illustrative only and not limiting to the invention, and that the particular features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples, and that modifications, substitutions, variations, and the like, which are not inventive in light of the above teachings, may be made to the embodiments by those skilled in the art without departing from the principles and spirit of the present invention, but are to be construed as broadly as the following claims.

Claims

1. The utility model provides a medium speed pulverizer is air seal sealing device in frame down, includes driving plate (1), its characterized in that: charcoal essence sealing ring (2) are installed to the surface below of transmission dish (1), interior gas seal go-between (3) is installed through first mounting bolt (5) in the top of charcoal essence sealing ring (2), four external seal ring (4) are installed through a plurality of second mounting bolt (6) to the outer wall of interior gas seal go-between (3), be provided with between interior gas seal go-between (3) and external seal ring (4) spacing subassembly (9), notch (7) have been seted up at the top of external seal ring (4), the bottom of transmission dish (1) is provided with seal assembly (8) all around, be provided with sealed wind cavity (10) between interior gas seal go-between (3) and transmission dish (1).

2. The air seal sealing device in the lower frame body of the medium speed coal mill according to claim 1, is characterized in that: sealing component (8) are including offering cavity (801) all around in driving dish (1) bottom, bearing (802) are installed to inside one side of cavity (801), the one end of bearing (802) is connected with screw rod (804) that extend to driving dish (1) outside, the one end of screw rod (804) is fixed with carousel (805), cam (803) have been cup jointed to the outer wall of screw rod (804), spout (807) have all been seted up to the both sides of cavity (801), two be provided with slide (806) between spout (807), the inside below of spout (807) is fixed with reset spring (808), the bottom of slide (806) is fixed with a plurality of connecting rods (809), the bottom mounting of connecting rod (809) has sealing washer (810).

3. The air seal sealing device in the lower frame body of the medium speed coal mill according to claim 2, characterized in that: the top end of the return spring (808) is connected with a sliding plate (806), and the sealing ring (810) and the connecting rod (809) are both in sliding connection with the sliding groove (807) through the sliding plate (806).

4. The air seal sealing device in the lower frame body of the medium speed coal mill according to claim 2, characterized in that: the cam (803) is located directly over the sliding plate (806), a rotating handle is fixed above one side of the rotating disc (805), the screw (804) is in threaded connection with the transmission disc (1), the sealing ring (810) is located directly over the notch (7), and the sealing ring (810) is matched with the notch (7).

5. The air seal sealing device in the lower frame body of the medium speed coal mill according to claim 1, is characterized in that: the limiting assembly (9) comprises a plurality of positioning columns (907) fixed on one side of the outer sealing ring (4), a plurality of positioning grooves (906) and grooves (901) which are formed in the inner sealing connecting ring (3), limiting grooves (905) are formed in the top and the bottom of the positioning columns (907), springs (902) are fixed inside the grooves (901), movable blocks (903) are connected to the bottom ends of the springs (902), and limiting convex blocks (904) extending to the inside of the limiting grooves (905) are installed at the bottoms of the movable blocks (903).

6. The air seal sealing device in the lower frame body of the medium speed coal mill as claimed in claim 5, characterized in that: the number of the grooves (901) is twice that of the positioning grooves (906), the positioning columns (907) are located inside the positioning grooves (906), and the positioning columns (907) are matched with the positioning grooves (906).

7. The air seal sealing device in the lower frame body of the medium speed coal mill according to claim 6, is characterized in that: the limiting lug (904) is matched with the limiting groove (905), the limiting lug (904) is connected with the groove (901) in a sliding mode through the movable block (903), and the diameter of the limiting lug (904) is smaller than that of the groove (901).