CN205260829U - Medium speed pulverizer pull rod - Google Patents
Medium speed pulverizer pull rod Download PDFInfo
- Publication number
- CN205260829U CN205260829U CN201521023723.XU CN201521023723U CN205260829U CN 205260829 U CN205260829 U CN 205260829U CN 201521023723 U CN201521023723 U CN 201521023723U CN 205260829 U CN205260829 U CN 205260829U
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- pull bar
- pull rod
- seal
- sealing
- nonmetal
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Abstract
The utility model discloses a medium speed pulverizer pull rod, including loose gland, pull rod and coal pulverizer casing, the loose gland is installed on the pull rod, it has upper seal spare to inlay on the loose gland, upper seal spare is connected with the pull rod, even there is nonmetal fabric compensator below the pull rod, nonmetal fabric compensator upper portion and coal pulverizer casing flange joint, nonmetal fabric compensator lower part and pull rod clamp connection, this medium speed pulverizer pull rod can solve upper portion seal wear problem, and the compensation ability is sealed to the lower part, reduces the outer leakage quantity of sealed wind and guarantees that the sealed department's pressure differential of pull rod is stable.
Description
Technical field
The utility model relates to a kind of medium-speed pulverizer pull bar.
Background technology
The ZGM-123N type roller ring mill that Datang Qitaihe power plant second phase pot adopts, since putting into operation often there is leaking powder phenomenon in hydraulic loading device tie-rod sealing place, the leakage of tie-rod sealing not only causes the wearing and tearing of a large amount of coal dust losses, pull bar and sealing ring, the loss of sealing air air quantity, the reduction of pressure, also severe contamination site environment, cause having to stop mill maintenance, affected unit load, Boiler Stability.
The tie-rod sealing top of coal pulverizer design adopts rigid sealing ring to contact with pull bar, and the encapsulant of its underpart sealing has adopted packing, and being sealed and matched of packing and pull bar, belongs to soft to hard friction. Rely on the pressure reduction of sealing air and a wind to stop coal dust in mill to leak to outside completely, pull bar and tie-rod sealing wearing and tearing, once be destroyed in the structure of equipment pull rod seal device in service, cause dust leakage, form vicious circle, make a large amount of dust leakages, cause maintenance extremely frequent. Due to the leakage of sealing air, the air quantity of sealing air, pressure start to reduce, and cause gradually other two tie-rod sealings indoor by the coal dust that bleeds, and have accelerated the rate of wear of other two tie-rod sealings.
Under normal circumstances, the service life of black box is between 3～6 months.
Still there are some defects in the sealing device of pull bar at present:
1. dust, the souring of duff grain in high-speed eddy have been ignored;
2. do not avoid dust, the duff grain district of high concentration;
3. the uncompensated ability of hermetically-sealed construction: upper sealing adopts rigid seal, and seal clearance grinds larger and larger, and lower seal adopts common packing, and compensation ability is poor. Therefore upper and lower black box grinds more serious and more serious, once seal clearance exceedes 2mm, sealing effectiveness can lose efficacy.
4. lower seal and lower flange form the friction of steel to steel, have strengthened the wearing and tearing to flange, and radial clearance is ground larger and larger, cause wind powder to be leaked to coal pulverizer outside, contaminated environment, tiny particle is sneaked into hydraulic oil with the respirator of hydraulic system, causes proportional pressure control valve frequently to break down.
Utility model content
The technical problems to be solved in the utility model is to provide one and has solved top seal wear problem, and lower seal compensation ability reduces the outer leakage quantity of sealing air and ensures the stable medium-speed pulverizer pull bar of tie-rod sealing place pressure reduction.
For addressing the above problem, the utility model adopts following technical scheme:
A kind of medium-speed pulverizer pull bar, comprise loose gland, pull bar and coal pulverizer casing, described loose gland is installed on pull bar, on described loose gland, be inlaid with seal, described upper seal is connected with pull bar, below described pull bar, be connected with nonmetal textile compensator, described nonmetal textile compensator top is connected with coal pulverizer casing flange, described nonmetal textile compensator bottom and pull bar clamp connection.
As preferably, described upper seal is seal on seal or high-temperature resistant polytetrafluoroethylmelt on graphite bronze.
As preferably, described nonmetal textile compensator is high temperature resistant nonmetal textile compensator.
Described the second road wheel 7 is provided with more than one.
The beneficial effects of the utility model are: pull bar bottom is used nonmetal textile compensator significantly to reduce sealing air and leaks, the Establishment of Stable of pressure reduction in ensureing tie-rod sealing place and grinding, make sealing air go out to blow in mill from upper sealing and pull bar gap, effectively reduce the wearing and tearing that foreign material in mill enter sealing and pull bar gap location and cause pull bar and sealing, the complementary capabilities of nonmetal textile compensator meets coal grinding machine tie-rod up and down and horizontal movement amount, non-metallic fabrics does not directly contact with pull bar, can not cause non-metallic fabrics damaged because of pull bar motion time, cause seal failure, top seal and pull bar contact portion, after transformation, change original hermetically-sealed construction metallic hard to hard seal form, the wearing and tearing of pull bar and seal are reduced, effectively control pull bar and upper seal gap, reduce sealing air amount of leakage and ensure that this structure place forms enough sealing loads, and by the sealing of bottom nonmetal textile compensator, sealing air is mainly blown in mill through upper sealing and pull bar place, prevent from grinding interior raw coal and foreign material, be deposited in sealing place.
Brief description of the drawings
Fig. 1 is the upper sealed structural representation of a kind of medium-speed pulverizer pull bar of the utility model.
Fig. 2 is the lower seal structural representation of a kind of medium-speed pulverizer pull bar of the utility model.
Detailed description of the invention
As shown in Figure 1-2, a kind of medium-speed pulverizer pull bar, comprise loose gland 1, pull bar 2 and coal pulverizer casing 3, described loose gland 1 is installed on pull bar 2, on described loose gland 1, be inlaid with seal 4, described upper seal 4 is connected with pull bar 2, and described pull bar 2 is connected with nonmetal textile compensator 5 below, described nonmetal textile compensator 5 tops are connected with coal pulverizer casing 3 flanges, described nonmetal textile compensator 5 bottoms and pull bar 2 clamp connections.
Described upper seal 4 is seal on seal or high-temperature resistant polytetrafluoroethylmelt on graphite bronze.
Described nonmetal textile compensator 5 is high temperature resistant nonmetal textile compensator, durable in use.
The beneficial effects of the utility model are: pull bar bottom is used nonmetal textile compensator significantly to reduce sealing air and leaks, the Establishment of Stable of pressure reduction in ensureing tie-rod sealing place and grinding, make sealing air go out to blow in mill from upper sealing and pull bar gap, effectively reduce the wearing and tearing that foreign material in mill enter sealing and pull bar gap location and cause pull bar and sealing, the complementary capabilities of nonmetal textile compensator meets coal grinding machine tie-rod up and down and horizontal movement amount, non-metallic fabrics does not directly contact with pull bar, can not cause non-metallic fabrics damaged because of pull bar motion time, cause seal failure, top seal and pull bar contact portion, after transformation, change original hermetically-sealed construction metallic hard to hard seal form, the wearing and tearing of pull bar and seal are reduced, effectively control pull bar and upper seal gap, reduce sealing air amount of leakage and ensure that this structure place forms enough sealing loads, and by the sealing of bottom nonmetal textile compensator, sealing air is mainly blown in mill through upper sealing and pull bar place, prevent from grinding interior raw coal and foreign material, be deposited in sealing place.
The above, be only detailed description of the invention of the present utility model, but protection domain of the present utility model is not limited to this, and any variation of expecting without creative work or replacement, within all should being encompassed in protection domain of the present utility model.
Claims (3)
1. a medium-speed pulverizer pull bar, it is characterized in that: comprise loose gland, pull bar and coal pulverizer casing, described loose gland is installed on pull bar, on described loose gland, be inlaid with seal, described upper seal is connected with pull bar, below described pull bar, be connected with nonmetal textile compensator, described nonmetal textile compensator top is connected with coal pulverizer casing flange, described nonmetal textile compensator bottom and pull bar clamp connection.
2. medium-speed pulverizer pull bar according to claim 1, is characterized in that: described upper seal is seal on seal or high-temperature resistant polytetrafluoroethylmelt on graphite bronze.
3. medium-speed pulverizer pull bar according to claim 2, is characterized in that: described nonmetal textile compensator is high temperature resistant nonmetal textile compensator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521023723.XU CN205260829U (en) | 2015-12-11 | 2015-12-11 | Medium speed pulverizer pull rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521023723.XU CN205260829U (en) | 2015-12-11 | 2015-12-11 | Medium speed pulverizer pull rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205260829U true CN205260829U (en) | 2016-05-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521023723.XU Active CN205260829U (en) | 2015-12-11 | 2015-12-11 | Medium speed pulverizer pull rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205260829U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958713A (en) * | 2021-10-29 | 2022-01-21 | 华能秦煤瑞金发电有限责任公司 | Hydraulic pull rod sealing device of medium-speed coal mill |
-
2015
- 2015-12-11 CN CN201521023723.XU patent/CN205260829U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958713A (en) * | 2021-10-29 | 2022-01-21 | 华能秦煤瑞金发电有限责任公司 | Hydraulic pull rod sealing device of medium-speed coal mill |
| CN113958713B (en) * | 2021-10-29 | 2023-10-10 | 华能秦煤瑞金发电有限责任公司 | Hydraulic pull rod sealing device of medium-speed coal mill |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |