CN219655412U - Valve rod anti-lock shaft seal structure of baiting valve - Google Patents
Valve rod anti-lock shaft seal structure of baiting valve Download PDFInfo
- Publication number
- CN219655412U CN219655412U CN202320839168.6U CN202320839168U CN219655412U CN 219655412 U CN219655412 U CN 219655412U CN 202320839168 U CN202320839168 U CN 202320839168U CN 219655412 U CN219655412 U CN 219655412U
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- CN
- China
- Prior art keywords
- valve
- valve rod
- seal structure
- oil
- shaft sleeve
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims 2
- 239000000945 filler Substances 0.000 claims 2
- 210000001503 joint Anatomy 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 10
- 230000001050 lubricating effect Effects 0.000 abstract description 7
- 239000004519 grease Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract 1
- 239000003250 coal slurry Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 101150038956 cup-4 gene Proteins 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
Abstract
The utility model relates to a valve rod anti-lock shaft seal structure of a discharging valve, and belongs to the technical field of valves. The shaft seal structure comprises a shaft sleeve embedded at the inner end part of a stuffing box of the discharging valve, two annular sealing grooves are formed in the inner annular surface of the shaft sleeve side by side along the circumferential direction, O-shaped sealing rings are respectively embedded in the two sealing grooves, an annular oil groove is formed in the outer circumferential surface of the shaft sleeve along the circumferential direction, an oil inlet hole penetrating through the shaft sleeve along the radial direction is formed in the oil groove, an oil filling hole is formed in the stuffing box along the radial direction, and the inner end of the oil filling hole is butted at the oil groove of the outer circumferential surface of the shaft sleeve. According to the valve rod anti-lock shaft seal structure, the gap between the valve rod and the stuffing box is sealed through the shaft sleeve, the function of adding lubricating grease to the valve rod is realized through the structures such as the oil filling hole, the oil groove and the oil inlet hole, the sealing performance and the lubricating degree of the valve rod are improved, and a good anti-lock effect is achieved.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a valve rod anti-lock shaft seal structure of a discharging valve.
Background
As a gasification device for pressurizing the coal water slurry, the device is an important part of the whole system process flow for conveying and controlling the raw coal slurry. Smooth and stable coal slurry conveying control is a basis for whether a system can stably and efficiently operate, and the management of two tanks (a coal slurry discharging tank and a coal slurry storage tank) for storing coal slurry is more critical. The coal slurry discharging valve is a special cut-off valve used in two tanks, the structural form is upward expansion type, and a valve joint with flushing water is used for flushing a process pipeline when the system is started and stopped. The discharge valve does not need to be regulated when the system is in a fully-opened state, and because a fit gap (total gap is 3 mm) is formed between the valve rod and the stuffing box nipple sleeve and between the valve body, coal slurry flowing through the valve can gradually infiltrate into the gap between the valve rod and the stuffing box sleeve in flowing. The fine particles with the granularity of 200-300 meshes in the coal slurry particles account for about 50% of the total amount, and the coal slurry which is permeated into the gap of the valve rod during long-period operation (120 days in 1 operation period) can be gradually compacted, dehydrated and solidified to be tightly adhered to the valve rod and the valve body, so that the valve rod is locked. When the system is stopped, the valve is difficult to close, the actuating mechanism is often broken and disabled when the external force is applied, the valve actuating mechanism is almost lost when the system is started and stopped, and great potential safety hazards are brought to the system operation, so that a great amount of maintenance cost is wasted.
The key reason for the problem is that the gap between the valve rod and the stuffing box is permeated with extremely fine coal slurry particles, and the extremely fine coal slurry particles are gradually precipitated, compacted and dehydrated, when the valve rod is closed, ash scale formed by precipitated and solidified coal powder is precipitated, compact and not loose in an annular space formed by the valve rod and the stuffing box, the valve rod cannot be extruded and crushed when moving, and accumulation is generated along with the movement of the valve rod, so that friction force is increased, and the valve rod is difficult to move, so that an actuating mechanism is damaged.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model designs a valve rod anti-lock shaft seal structure of a discharge valve, so as to solve the problems that the valve rod of the existing coal slurry discharge valve is easy to lock and difficult to close after long-period operation.
The technical scheme adopted by the utility model is as follows: the shaft seal structure comprises a shaft sleeve embedded at the inner end part of a stuffing box of the discharging valve, two annular sealing grooves are formed in the inner annular surface of the shaft sleeve side by side along the circumferential direction, O-shaped sealing rings are respectively embedded in the two sealing grooves, an annular oil groove is formed in the outer circumferential surface of the shaft sleeve along the circumferential direction, a first oil inlet hole penetrating through the shaft sleeve along the radial direction is formed in the oil groove, an oil filling hole is formed in the stuffing box along the radial direction, and the inner end of the oil filling hole is butted at the oil groove of the shaft sleeve.
Further, the oil groove is located in the axial middle of the shaft sleeve, and the two sealing grooves are located on one side, close to the inner side end, of the oil groove.
Further, a second oil inlet hole penetrating in the radial direction is formed between the two sealing grooves of the shaft sleeve, and the first oil inlet hole and the second oil inlet hole are communicated on the outer peripheral surface of the shaft sleeve.
Further, the outer side surface of the stuffing box is provided with an oil filling nozzle or an oil filling cup at the oil filling hole.
Compared with the prior art, the valve rod anti-lock shaft seal structure of the discharging valve disclosed by the utility model has the advantages that: the inner side end of a stuffing box of the discharging valve is embedded with a shaft sleeve, the valve rod is sealed by two O-shaped sealing rings on the inner side surface of the shaft sleeve, and a gap between the valve rod and a stuffing box valve body is eliminated; simultaneously, the structure such as the oil groove, the oil filling hole and the oil inlet hole is arranged, lubricating grease is filled into the structure by utilizing an external oil nozzle or an external oil cup for lubrication and auxiliary sealing, and fine coal dust infiltration is prevented. In the running process, because all spaces of the stuffing box are filled with lubricating grease, fine particle coal dust is difficult to enter the shaft head, so that the friction force between the O-shaped sealing ring and the valve rod is greatly reduced. Even in the process of opening and closing for many times, a small amount of pulverized coal particles are brought into the valve rod, and the pulverized coal particles and lubricating grease can not play a role in limiting and binding the valve rod after being mixed, so that the problem that the valve rod can not be opened or closed difficultly before transformation is solved.
Drawings
Fig. 1 is a schematic structural view of a valve stem anti-lock shaft seal structure of a blow valve.
Fig. 2 is a schematic cross-sectional view of a sleeve.
In the figure, a discharging valve 1, a stuffing box 2, a shaft sleeve 3, a 4 oil adding cup, an oil adding hole 21, an oil groove 31, a sealing groove 32, a 33-O-shaped sealing ring, a first oil inlet hole 34 and a second oil inlet hole 35.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific examples. The technical solutions in the embodiments of the present utility model are clearly and completely described, and the described embodiments are only some embodiments, but not all embodiments, of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model disclosed herein without departing from the scope of the utility model.
As shown in fig. 1 and 2, the utility model designs an embodiment of a valve rod anti-lock shaft seal structure of a discharge valve, and the shaft seal structure in the embodiment comprises a shaft sleeve 3 embedded at the inner end part of a stuffing box 2 of the discharge valve 1, and is used as a rear end shaft seal stuffing positioning table, and is fixed by a stuffing gland or is fixed by transitional or interference connection spot welding with a valve body.
An annular oil groove 31 is formed in the peripheral surface of the shaft sleeve 3 along the circumferential direction, and the oil groove 31 is positioned in the axial middle of the shaft sleeve 3. The sleeve 3 is provided with a first oil inlet hole 34 penetrating in the radial direction at the oil groove 31. Two annular sealing grooves 32 are formed in the inner annular surface of the shaft sleeve 3 side by side along the circumferential direction, O-shaped sealing rings 33 are respectively embedded in the two sealing grooves 32, and the two sealing grooves 32 are positioned on one side, close to the inner side end, of the oil groove 31. The shaft sleeve 3 is provided with a second oil inlet hole 35 penetrating in the radial direction between the two sealing grooves 32, and the first oil inlet hole 34 and the second oil inlet hole 35 are communicated on the outer peripheral surface of the shaft sleeve 3.
Meanwhile, the discharge valve 1 is provided with an oil filling hole 21 in the radial direction on the stuffing box 2, and the inner side end of the oil filling hole 21 is butted at the oil groove 31 of the shaft sleeve 3. The outer side surface of the stuffing box 2 is provided with a stuffing cup 4 at the stuffing hole 21.
When the valve rod anti-lock shaft seal structure of the discharging valve disclosed by the utility model is applied, the valve rod is inserted along the inner side surface of the shaft sleeve, and the valve rod and the shaft sleeve are sealed through two O-shaped sealing rings. Lubricating grease is added through the oil adding cup 4, and can enter between the shaft sleeve and the valve rod along the oil adding hole 21 and the first oil inlet hole 34, and simultaneously enters between the two O-shaped sealing rings inside the shaft sleeve through the second oil inlet hole 35, so that lubricating grease is filled between the valve rod and the shaft sleeve as well as between the valve rod and the stuffing box, and locking of coal dust entering is avoided.
The foregoing is merely illustrative of the present utility model and is not intended to limit the scope of the utility model, i.e., all such modifications and variations are within the scope of the utility model as defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a valve rod anti-lock shaft seal structure of blowing valve, its characterized in that, shaft seal structure includes the axle sleeve of embedded at the inboard tip of the stuffing box of blowing valve, open along circumference on the interior anchor ring of axle sleeve side by side has two annular seal grooves, has embedded O type sealing washer in the two seal grooves respectively, open along circumference on the outer peripheral face of axle sleeve has an annular oil groove, the axle sleeve is opened in the oil groove department has the first inlet port that runs through along the radial direction, open along the radial direction on the stuffing box has the tank filler, the inboard end butt joint of tank filler is in the oil groove department of axle sleeve.
2. The valve stem anti-lock shaft seal structure of a blow-off valve according to claim 1, wherein the oil groove is located at an axial middle portion of the sleeve, and the two seal grooves are located at a side of the oil groove near an inner side end.
3. The valve stem anti-lock shaft seal structure of a blow-off valve according to claim 2, wherein a second oil inlet hole penetrating in the radial direction is formed between the two sealing grooves of the shaft sleeve, and the first oil inlet hole and the second oil inlet hole are communicated on the outer peripheral surface of the shaft sleeve.
4. A valve stem anti-lock shaft seal structure of a blow valve according to claim 3, wherein the outer side surface of the stuffing box is provided with a filling nozzle or a filling cup at the filling hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320839168.6U CN219655412U (en) | 2023-04-11 | 2023-04-11 | Valve rod anti-lock shaft seal structure of baiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320839168.6U CN219655412U (en) | 2023-04-11 | 2023-04-11 | Valve rod anti-lock shaft seal structure of baiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219655412U true CN219655412U (en) | 2023-09-08 |
Family
ID=87877967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320839168.6U Active CN219655412U (en) | 2023-04-11 | 2023-04-11 | Valve rod anti-lock shaft seal structure of baiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219655412U (en) |
-
2023
- 2023-04-11 CN CN202320839168.6U patent/CN219655412U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |