CN210218684U - Supporting pull rod sealing device of variable-loading medium-speed coal mill of power station - Google Patents
Supporting pull rod sealing device of variable-loading medium-speed coal mill of power station Download PDFInfo
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- CN210218684U CN210218684U CN201921225781.9U CN201921225781U CN210218684U CN 210218684 U CN210218684 U CN 210218684U CN 201921225781 U CN201921225781 U CN 201921225781U CN 210218684 U CN210218684 U CN 210218684U
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Abstract
A power station variable loading medium speed coal mill support pull rod sealing device. The power plant uses a variable-loading medium-speed coal mill, and the coal mill frequently has the defects of sealing and powder and ash leakage of a supporting rod due to the fact that the coal mill carries out grinding blocks and moves up and down. The utility model discloses the constitution includes: this medium speed pulverizer supports pull rod sealing device is including cover movable conical cover (2), sealed wind chamber (4), lower seal dustcoat (5) and sealing flange (10) on supporting pull rod (15), movable conical cover with the support pull rod between set up the sealed (1) of software on the multichannel, movable conical cover is inside to have a set of pressure relief groove (14), is provided with down the software in the lower seal dustcoat and seals (11), is provided with built-in carbon smart ring (9) down between sealed and the support pull rod of software, is provided with the smart ring of plane top formula carbon (8) in the upper and lower two planar ring channels of lower seal software. The utility model is used for power station becomes sealed of loading intermediate speed coal pulverizer support pull rod.
Description
The technical field is as follows:
the utility model relates to a power station becomes load intermediate speed coal pulverizer and supports pull rod sealing device.
Background art:
in a coal mill pulverizing system of a thermal power plant, most power plants in China currently use variable-load medium-speed coal mills, a support rod pull rod of the variable-load medium-speed coal mill is sealed during operation, and is subjected to vertical movement due to the fact that coal grinding blocks are ground by the coal mill, so that the defects of powder leakage and ash leakage of the support rod seal often occur. On the other hand, the coal slag enters, namely, the support rod of the rapid coal mill is abraded, the field working environment is polluted, and the overall safe and civilized production level of a power plant is influenced.
The utility model has the following contents:
the utility model aims at solving and becoming the problem that the sealed powder that leaks, the ash that leaks of bracing piece often appears in load medium speed pulverizer, provide one kind and adopt pushing off the slag and the multilayer is sealed to effectual the revealing that prevents sealed wind, its sealing member and pull rod contact are tight, and can be reliable rock and slide along with the pull rod, sealed reasonable effectual power station becomes load medium speed pulverizer and supports pull rod sealing device.
The above purpose is realized by the following technical scheme:
the utility model provides a power station becomes load medium speed pulverizer and supports pull rod sealing device, this medium speed pulverizer supports pull rod sealing device including cover movable conical cover, sealed wind chamber, lower seal dustcoat and the sealed flange on supporting the pull rod, movable conical cover with the support pull rod between set up the multichannel and go up the software and seal, movable conical cover inside have a set of pressure relief groove, lower seal dustcoat in be provided with down the software sealed, lower software sealed with the support pull rod between be provided with built-in carbon smart ring, the sealed upper and lower two planar ring channels of lower software in be provided with the smart ring of plane top formula carbon.
The power station variable-loading medium-speed coal mill support pull rod sealing device is characterized in that the movable conical cover is hemispherical.
The power station variable-load medium-speed coal mill supports the pull rod sealing device, and the movable conical cover is connected with the sealed air cavity through a clamping plate.
The power station variable loading medium speed coal mill support pull rod sealing device is characterized in that a spring groove and a clamp groove are formed in the outer side of the lower soft body seal, a spring is fixed in the spring groove, and a clamp is fixed in the clamp groove.
The power station variable load medium speed coal mill support pull rod sealing device is characterized in that the lower sealing outer cover is connected with the sealing flange through a bolt, and the sealing flange is in contact with the lower surface of the lower soft body seal.
The power station variable loading medium speed coal mill support pull rod sealing device is characterized in that the upper soft body seal and the lower soft body seal are both carbon fiber annular structures.
The power station variable loading medium speed coal mill support pull rod sealing device is characterized in that the upper soft body is sealed for 2-4 times.
Has the advantages that:
1. the utility model discloses a pushing off the sediment and the multilayer is sealed to effectual having prevented revealing of sealed wind, its sealing member contacts tightly with the pull rod, and can be reliable rock and slide along with the pull rod, and is sealed reasonable effective. The coal mill of the power plant can be ensured to operate safely and effectively for a long time, the equipment cost is greatly reduced, and the safety and reliability are realized, so that the safety risk of operating personnel is reduced.
2. The utility model discloses long service life reaches 3 years, and easy wearing and tearing price is lower, only needs the smart ring of wear-resisting carbon of periodic replacement, and it is convenient to overhaul, and a workday just can accomplish the maintenance, has improved former support pull rod and has leaked the defect of powder, leaking the ash, and equipment long service life overhauls the activity duration weak point.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
in the figure: 1. sealing with a soft body; 2. a movable conical cover; 3. clamping a plate; 4. sealing the air cavity; 5. a lower sealed outer cover; 6. a spring slot; 7. a clamp groove; 8. a plane top type carbon ring; 9. a carbon ring is arranged inside; 10. sealing the flange; 11. sealing the lower soft body; 12. clamping a hoop; 13. a spring; 14. a pressure relief groove; 15. and supporting the pull rod.
The specific implementation mode is as follows:
example 1:
the utility model provides a power station becomes load medium speed pulverizer and supports pull rod sealing device, this medium speed pulverizer support pull rod sealing device including cover at support pull rod 15 on movable conical cover 2, sealed wind chamber 4, lower sealed dustcoat 5 and sealing flange 10, movable conical cover with the support pull rod between set up the sealed 1 of software on the multichannel, movable conical cover inside have a set of pressure release groove 14, lower sealed dustcoat in be provided with down the software and seal 11, lower software seal with the support pull rod between be provided with built-in carbon smart ring 9, the upper and lower two planar ring channel of lower software seal in be provided with the smart ring 8 of plane top formula carbon.
Example 2:
according to the supporting pull rod sealing device of the power station variable-loading medium-speed coal mill in the embodiment 1, the movable conical cover is hemispherical.
Example 3:
according to the power station variable loading medium speed coal mill support pull rod sealing device in the embodiment 1 or 2, the movable conical cover is connected with the sealing air cavity through the clamping plate 3.
Example 4:
according to the supporting pull rod sealing device of the power station variable loading medium speed coal mill in the embodiment 1, 2 or 3, a spring groove 6 and a clamp groove 7 are formed in the outer side of the lower soft body seal, a spring 13 is fixed in the spring groove, a clamp 12 is fixed in the clamp groove, and the spring is annular.
Example 5:
according to the power station variable load medium speed coal mill support pull rod sealing device in the embodiment 1, 2, 3 or 4, the lower sealing outer cover is connected with the sealing flange through bolts, and the sealing flange is in contact with the lower surface of the lower soft seal.
Example 6:
the supporting pull rod sealing device of the power station variable loading medium speed coal mill according to the embodiment 1, 2, 3, 4 or 5, wherein the upper soft body seal and the lower soft body seal are both carbon fiber annular structures.
Example 7:
according to the power station variable loading medium speed coal mill support pull rod sealing device in the embodiment 1, 2, 3, 4, 5 or 6, the upper soft body sealing is 2-4.
Wherein the sealing of the support pull rod of the rapid coal mill is divided into an upper sealing part and a lower sealing part,
1. The upper seal is that the movable conical cover is in a spherical form, the surface can not accumulate dust or slag along with the movement of the pull rod, a plurality of carbon fiber soft seals are additionally arranged in the movable conical cover, the pull rod is tightly held by utilizing the thermal expansion force (expandable when the working temperature reaches 40 ℃) of the soft seals, the gap between the cone and the pull rod is eliminated, ① can thoroughly prevent powder and ash from penetrating from the cone and ensure that the sealing cavity is not polluted because the pull rod is sealed by the soft seals and cannot scratch the pull rod, the pull rod can not be damaged, the upward and downward movement and the multidirectional displacement soft seals of the pull rod can be twisted and still can not be influenced along with the original character, a clamping groove is arranged at the outer circumference of the movable conical cover ② and is matched with the clamping plate to realize fixation, a stamping hole is arranged on the sealing air cavity, high-pressure sealing air is used for stamping the sealing air cavity in a unit site, gas can be discharged from the pressure groove when the sealing air pressure expands, ash slag is flushed, and the ash is removed, and the ash blocking effect of powder is achieved.
2. The lower seal is a combined seal, the lower soft seal is made of high-temperature-resistant and wear-resistant rubber, and the lower soft seal and the wear-resistant carbon ring are combined into a sealing device. The inner diameter of the lower soft seal is negative to the diameter of the pull rod, the outer diameter of the lower soft seal is tensioned by two springs and a hoop, the expansion of the lower soft seal is controlled, the lower soft seal tightly holds the pull rod and can automatically contract to zero position for sealing after being worn, a plurality of carbon rings are arranged in the inner diameter of the lower soft seal, and the self-lubricating and wear-resisting properties of the carbon rings are utilized, so that the effective service life of a box body is effectively compensated and enhanced, the plane top type carbon rings are arranged outside the sealing box body and at the upper plane and the lower plane and are compressed through flanges, and a gapless state is formed between the plane heights by utilizing the bending tension of the. Can effectively block the S type of slag powder and pierce through to strengthen the wear-resisting and lubricating function of letter body, use the bracing piece sealed back, long service life reaches 3 years, and easy wearing and tearing price is lower, only need regularly change wear-resisting carbon essence ring, it is convenient to overhaul, overhaul just can be accomplished on a weekday, the defect that former support pull rod leaks powder, leaks ash has been improved, equipment long service life, it is short to overhaul the activity duration, seal structure improves the contrast of back sealing member annual consumption as shown in the following table:
Claims (7)
1. the utility model provides a power station becomes load intermediate speed pulverizer and supports pull rod sealing device which characterized by: this medium speed pulverizer supports pull rod sealing device is including the movable toper cover of cover on supporting the pull rod, sealed wind chamber, lower seal dustcoat and sealed flange, movable toper cover with the supporting the pull rod between set up the multichannel on the software sealed, movable toper cover inside have a set of pressure relief groove, lower seal dustcoat in be provided with down the software sealed, lower software sealed with the supporting the pull rod between be provided with built-in carbon ring essence, the sealed upper and lower two planar ring channels of lower software in be provided with plane top formula carbon ring essence.
2. The power station variable loading medium speed coal mill support pull rod sealing device of claim 1, characterized in that: the movable conical cover is hemispherical.
3. The power station variable loading medium speed coal mill support pull rod sealing device of claim 1 or 2, characterized in that: the movable conical cover is connected with the sealed air cavity through a clamping plate.
4. The power station variable loading medium speed coal mill support pull rod sealing device of claim 1, characterized in that: the outer side of the lower soft body seal is provided with a spring groove and a clamp groove, a spring is fixed in the spring groove, and a clamp is fixed in the clamp groove.
5. The power station variable loading medium speed coal mill support pull rod sealing device of claim 1, characterized in that: the lower sealing outer cover is connected with the sealing flange through bolts, and the sealing flange is in contact with the lower surface of the lower soft seal.
6. The power station variable loading medium speed coal mill support pull rod sealing device of claim 1, characterized in that: the upper soft body seal and the lower soft body seal are both carbon fiber annular structures.
7. The power station variable loading medium speed coal mill support pull rod sealing device of claim 1 or 6, characterized in that: the upper soft body is sealed for 2-4 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921225781.9U CN210218684U (en) | 2019-07-31 | 2019-07-31 | Supporting pull rod sealing device of variable-loading medium-speed coal mill of power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921225781.9U CN210218684U (en) | 2019-07-31 | 2019-07-31 | Supporting pull rod sealing device of variable-loading medium-speed coal mill of power station |
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| Publication Number | Publication Date |
|---|---|
| CN210218684U true CN210218684U (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921225781.9U Active CN210218684U (en) | 2019-07-31 | 2019-07-31 | Supporting pull rod sealing device of variable-loading medium-speed coal mill of power station |
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| CN (1) | CN210218684U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375074A (en) * | 2019-07-31 | 2019-10-25 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | Power station becomes load medium-speed pulverizer tie-strut sealing device |
| 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 |
-
2019
- 2019-07-31 CN CN201921225781.9U patent/CN210218684U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375074A (en) * | 2019-07-31 | 2019-10-25 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | Power station becomes load medium-speed pulverizer tie-strut sealing device |
| 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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