CN207996706U - A kind of coal mill draw bar sealing device - Google Patents
A kind of coal mill draw bar sealing device Download PDFInfo
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- CN207996706U CN207996706U CN201820022975.8U CN201820022975U CN207996706U CN 207996706 U CN207996706 U CN 207996706U CN 201820022975 U CN201820022975 U CN 201820022975U CN 207996706 U CN207996706 U CN 207996706U
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- external seal
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Abstract
The utility model discloses a kind of coal mill draw bar sealing devices, include the external seal cylinder and interior sealing cylinder that is sleeved on outside pull rod and can slide up and down sealing cooperation, it is connected by fixing piece between external seal cylinder and pull rod, fixing piece is equipped with and external seal cylinder snap fit and the annular slot that can radially wobble, it is tightly connected by sealing element A between fixing piece and external seal cylinder, the bottom end of interior sealing cylinder is fixed on former trolley case, the sealing element B that pilot seal coordinates between external seal cylinder inner wall is installed on the outside of the upper end end of interior sealing cylinder, the bottom end of external seal cylinder is equipped with the sealing element C that pilot seal coordinates between interior sealing cylinder lower end, interior sealing drum outer wall between sealing element B and sealing element C is equipped with limited block, the inner wall of external seal cylinder bottom end is equipped with limited block.The structure design of the utility model is reasonable, can effectively solve the problem that medium-speed pulverizer tie-rod sealing leakage powder, leaks out, wear the problem of pull rod, and whole device is enclosed construction, it can be achieved that without sealing air operation.
Description
Technical field:
The utility model is related to coal pulverizer apparatus fields, relate generally to a kind of coal mill draw bar sealing device.
Background technology:
The equipment of coal dust processed generally uses ball coal pulverizer in the past, and in recent years, intermediate speed roller disc type grinding coal pulverizer is used widely, this
The work of kind coal mill is that motor passes through speed reducer driving mill rotation, and the rotation of mill drives three mills for being mutually hexagonal angle
Roller passively rotates, and raw coal falls into disc surface by coal feeding pipe, and under the influence of centrifugal force, raw coal is radially transported to mill periphery
It moves evenly into mill roller-way, mills between mill and grinding roller, the pressure milled is by loading frame and pull rod by another
If hydraulic device supply, pull rod by closed intermediate speed roller disc type grinding mill stretch out with the piston rod in connection liquid cylinder pressure.At this time
Pull rod had not only done displacement up and down, but also did radially wobbling for 12-15 ° of inclination angle, and existing pull rod is made of rigid material, and sealing element is in
In high temperature coal dust environment, pull rod makees Multidirectional motion again, leakage powder often occurs and wears pull rod, reduces production efficiency;And it is close
Envelope wind leakage can make coal dust while leak, and also have pebble coal leakage when gap is big, pollute environment, generate whister-type noise, increase environment and make an uproar
Sound, waste of energy increase energy consumption, unfavorable to carry out production strictly in line with rules and regulations, in conclusion being transformed to existing medium-speed pulverizer tie-rod sealing seems outstanding
It is urgent.
Utility model content:
The utility model aim is exactly to provide a kind of coal mill draw bar sealing device to make up the defect of prior art,
It can effectively solve the problem that medium-speed pulverizer tie-rod sealing leakage powder, leak out, wear the problem of pull rod.
The utility model is achieved through the following technical solutions:
A kind of coal mill draw bar sealing device, it is characterised in that:Include to be sleeved on outside pull rod and sealing can be slided up and down
The external seal cylinder and interior sealing cylinder of cooperation, are connected by fixing piece between the external seal cylinder and pull rod, are set on the fixing piece
Have with external seal cylinder snap fit and the annular slot that can radially wobble, pass through sealing element between the fixing piece and external seal cylinder
A is tightly connected, and the bottom end of the interior sealing cylinder is fixed on former trolley case, peace on the outside of the upper end end of the interior sealing cylinder
Equipped with the sealing element B that pilot seal between external seal cylinder inner wall coordinates, the bottom end of the external seal cylinder be equipped with it is interior close
The sealing element C that pilot seal coordinates between sealed tube lower end, on the interior sealing drum outer wall between the sealing element B and sealing element C
Equipped with limited block, the inner wall of external seal cylinder bottom end is equipped with limited block.
The external seal cylinder and interior sealing cylinder is the metal cylinder sealing drum with central through hole, and external seal cylinder
Upper port portion is respectively equipped with upper-end closing plate, and the middle part of end-plate, which is equipped with, thereon clamps hole.
It is connected by fixing piece between the upper-end closing plate and pull rod, the middle part of the fixing piece is equipped with to be set with pull rod
The channel of cooperation, and the sealing ring coordinated with tie-rod sealing is equipped in channel, the outer circumference surface of the fixing piece be equipped with
The annular slot of upper-end closing plate snap fit, and upper-end closing plate can move left and right in annular slot.
The fixing piece uses two halves opposite structure, and one is linked as by the fixedly connected hole above annular slot
Body.
The upper end of the sealing element A is fixed on by clip on fixing piece.
The sealing element B uses double seal lips structure, and is fixed by clip in lip.
One end of the sealing element C is fixed on external seal cylinder bottom end by clip, and the other end of the sealing element C is
Arc segment structure, and the lower end extrados of its segmental arc and interior sealing cylinder are tangent.
Its principle is:External seal cylinder is moved up and down by fixing piece with pull rod, and sealing element B is designed by lip, is used for close
The simple rising sun between external seal cylinder and interior sealing cylinder is sealed, sealing element A is configured as the sealing between fixing piece and external seal cylinder gap, and
It can be moved with fixing piece, can have horizontal displacement between fixing piece and external seal cylinder, radially wobbling for pull rod can be met in this way
With move up and down, and powder leakage phenomenon can be effectively eliminated, never wornout pull rod can be real because whole device is enclosed construction
Now run without sealing air.
The utility model has the advantages that:
The structure design of the utility model is reasonable, by that can slide up and down the external seal cylinder of cooperation and interior sealing barrel structure, solid
Determine the structure that can have between horizontal displacement and its sealing between part and external seal cylinder, can effectively solve the problem that medium-speed pulverizer tie-rod sealing
Leakage powder leaks out, wear the problem of pull rod, and whole device is enclosed construction, it can be achieved that without sealing air operation.
Description of the drawings:
Fig. 1 is the structural schematic diagram of the utility model.
Specific implementation mode:
Referring to attached drawing 1.
A kind of coal mill draw bar sealing device, it is characterised in that:Include to be sleeved on outside pull rod 1 and sealing can be slided up and down
The external seal cylinder 2 and interior sealing cylinder 3 of cooperation, are connected between the external seal cylinder 2 and pull rod 1 by fixing piece 4, the fixing piece
4 be equipped with 2 snap fit of external seal cylinder and the annular slot 5 that can radially wobble, between the fixing piece 4 and external seal cylinder 2
It is tightly connected by sealing element A6, the bottom end of the interior sealing cylinder 3 is fixed on former trolley case 18, the interior sealing cylinder 3
The sealing element B7 that pilot seal coordinates between 2 inner wall of external seal cylinder is installed on the outside of the end of upper end, the external seal cylinder 2
Bottom end is equipped with the sealing element C8, the sealing element B7 and sealing element that pilot seal coordinates between 3 lower end of interior sealing cylinder
3 outer wall of interior sealing cylinder between C8 is equipped with limited block 9, and the inner wall of external seal cylinder bottom end is equipped with limited block 15.
The external seal cylinder 2 and interior sealing cylinder 3 is the metal cylinder sealing drum with central through hole, and external seal cylinder
Two-port portion be respectively equipped with upper-end closing plate 10, thereon the middle part of end-plate 10 be equipped with clamp hole 11.
It is connected by fixing piece 4 between the upper-end closing plate 10 and pull rod 1, fixing piece is not in direct contact with pull rod, institute
The middle part for stating fixing piece 4 is equipped with the channel coordinated with the suit of pull rod 1, and the sealing ring coordinated with tie-rod sealing is equipped in channel
D12, the outer circumference surface of the fixing piece 4 is equipped with the annular slot 5 with 10 snap fit of upper-end closing plate, and upper-end closing plate 10 can
It is moved left and right in annular slot 5.
The fixing piece 4 uses two halves opposite structure, is linked as by the fixedly connected hole 13 above annular slot
One.
The upper end of the sealing element A6 is fixed on the retainers 4 by clip 17.
The sealing element B7 uses double seal lips structure, and is fixed by clip 16 in lip.
One end of the sealing element C8 is fixed on external seal cylinder bottom end by clip 14, and the sealing element C8's is another
End is arc segment structure, and the lower end extrados of its segmental arc and interior sealing cylinder 2 are tangent.
During use:
The fixing piece uses two halves opposite structure, and one is linked as by the fixedly connected hole above annular slot
Body can facilitate integrally-built installation and removal.
By designing the enclasping force of above-mentioned fixing piece and pull rod in certain threshold range, the pole when for example overhauling
Under limit state(When pull rod is too high or too low):
A. when pull rod is excessively high(When more than design threshold range)
Limited block prevents external seal cylinder from continuing up promotion, and external seal cylinder couples the rising for limiting fixing piece simultaneously, Gu
Part is determined in certain position locking, and pull rod can continue freely individually to be promoted at this time;But when the displacement of pull rod is excessive(More than to
After fixed external seal cylinder active strokes), when the postive stop baffle in external seal cylinder is contacted with limited block, pull rod is to entire outer
The lifting power of sealing drum is equal to the enclasping force of sealing element D, and when enclasping force is less than limited block resistance, pull rod is with sealing element D by quiet
Friction becomes sliding friction, continues up, and the integral telescopic amount of entire sealing device is controlled in external seal cylinder maximum
At active strokes.
B. when pull rod is too low(When more than design threshold range)
The decline of fixing piece is limited by interior sealing cylinder, fixing piece is when pull rod is too low, because contacting interior sealing cylinder due to locking,
And pull rod can continue freely individually to decline at this time.
C. when normal operation
Fixing piece external seal cylinder can be stablized with pull rod automatic shift in certain section.Under normal circumstances(Above and below pull rod
When stroke is no more than the spacing between limited block and trolley case)Fixing piece moves together with pull rod.
Claims (7)
1. a kind of coal mill draw bar sealing device, it is characterised in that:Include to be sleeved on outside pull rod and sealing can be slided up and down to match
The external seal cylinder and interior sealing cylinder of conjunction, are connected between the external seal cylinder and pull rod by fixing piece, the fixing piece is equipped with
With external seal cylinder snap fit and the annular slot that can radially wobble, pass through sealing element A between the fixing piece and external seal cylinder
It is tightly connected, the bottom end of the interior sealing cylinder is fixed on former trolley case, peace on the outside of the upper end end of the interior sealing cylinder
Equipped with the sealing element B that pilot seal between external seal cylinder inner wall coordinates, the bottom end of the external seal cylinder be equipped with it is interior close
The sealing element C that pilot seal coordinates between sealed tube lower end, on the interior sealing drum outer wall between the sealing element B and sealing element C
Equipped with limited block, the inner wall of external seal cylinder bottom end is equipped with limited block.
2. coal mill draw bar sealing device according to claim 1, it is characterised in that:The external seal cylinder and interior sealing
Cylinder is the metal cylinder sealing drum with central through hole, and the upper port portion of external seal cylinder is respectively equipped with upper-end closing plate, thereon
The middle part of end-plate, which is equipped with, clamps hole.
3. coal mill draw bar sealing device according to claim 2, it is characterised in that:The upper-end closing plate and pull rod it
Between connected by fixing piece, the middle part of the fixing piece is equipped with the channel closed with drag link sleeve assembly, and is equipped with and draws in channel
The sealing ring of bar sealing cooperation, the outer circumference surface of the fixing piece are equipped with the annular slot with upper-end closing plate snap fit, and
Upper-end closing plate can move left and right in annular slot.
4. coal mill draw bar sealing device according to claim 3, it is characterised in that:The fixing piece uses two halves pair
Box-like structure is linked together by the fixedly connected hole above annular slot.
5. coal mill draw bar sealing device according to claim 1, it is characterised in that:The upper end of the sealing element A
It is fixed on fixing piece by clip.
6. coal mill draw bar sealing device according to claim 1, it is characterised in that:The sealing element B uses double density
Lip configuration is sealed, and is fixed by clip in lip.
7. coal mill draw bar sealing device according to claim 1, it is characterised in that:One end of the sealing element C is logical
It crosses clip and is fixed on external seal cylinder bottom end, the other end of the sealing element C is arc segment structure, and the lower end of its segmental arc
Extrados and interior sealing cylinder are tangent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820022975.8U CN207996706U (en) | 2018-01-08 | 2018-01-08 | A kind of coal mill draw bar sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820022975.8U CN207996706U (en) | 2018-01-08 | 2018-01-08 | A kind of coal mill draw bar sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207996706U true CN207996706U (en) | 2018-10-23 |
Family
ID=63836741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820022975.8U Active CN207996706U (en) | 2018-01-08 | 2018-01-08 | A kind of coal mill draw bar sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207996706U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107999208A (en) * | 2018-01-08 | 2018-05-08 | 安徽齐盈电力设备科技有限公司 | A kind of coal mill draw bar sealing device |
-
2018
- 2018-01-08 CN CN201820022975.8U patent/CN207996706U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107999208A (en) * | 2018-01-08 | 2018-05-08 | 安徽齐盈电力设备科技有限公司 | A kind of coal mill draw bar sealing device |
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