CN213871381U - Valve rod sealing device of high-pressure regulating valve of steam turbine - Google Patents
Valve rod sealing device of high-pressure regulating valve of steam turbine Download PDFInfo
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- CN213871381U CN213871381U CN202022560746.1U CN202022560746U CN213871381U CN 213871381 U CN213871381 U CN 213871381U CN 202022560746 U CN202022560746 U CN 202022560746U CN 213871381 U CN213871381 U CN 213871381U
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Abstract
The utility model discloses a sealing device for a valve rod of a high-pressure regulating valve of a steam turbine, which comprises a valve sleeve, a valve rod penetrating through the valve sleeve, a labyrinth sealing structure arranged on the inner wall of the valve sleeve, a packing groove extending from the outside of one side of the valve sleeve on the inner wall of the valve sleeve, a sealing filler arranged in the packing groove, a top pressure sleeve sleeved on the valve rod, an internal thread sleeve and a steering handle sleeve arranged outside the packing groove in sequence, a ring cover sleeved outside the top pressure sleeve, the ring cover is screwed on the valve sleeve through a bolt, the bolt is fixed with the valve sleeve, the outer wall of the top pressure sleeve is axially provided with a plurality of chutes, the chutes extend to the end part of the top pressure sleeve towards the direction of the internal thread sleeve, a slide block arranged in the chutes in a sliding way is fixed on the inner wall of the ring cover, the internal thread sleeve is axially fixed with the ring cover, the steering handle sleeve is inserted into the internal thread sleeve and is in threaded connection with the internal thread sleeve, one end of the steering handle sleeve is abutted against one end of the top pressure sleeve, the advantages are that: the graphite sealing filler is compressed by the jacking sleeve in time, so that the phenomena of air leakage and abnormal sound caused by deformation are avoided.
Description
The technical field is as follows:
the utility model relates to a sealed technical field, concretely relates to steam turbine high pressure governing valve rod sealing device.
Background art:
generally, a valve rod penetrates through a valve sleeve of a high-pressure regulating valve of a steam turbine, a labyrinth seal structure is arranged on the inner wall of the valve sleeve and seals the valve sleeve and the valve rod, high-temperature and high-pressure air is introduced into the high-pressure regulating valve, phenomena such as scouring and thermal expansion exist in the operation process, the labyrinth seal structure is hard in texture, the sealing gap is increased due to easy deformation, air leakage and abnormal sound phenomena occur, the field temperature is high, and people are easily injured by the air leakage.
The utility model has the following contents:
an object of the utility model is to provide a steam turbine high pressure governing valve rod sealing device.
The utility model discloses by following technical scheme implement:
a valve rod sealing device of a high-pressure regulating valve of a steam turbine comprises a valve sleeve, a valve rod penetrates through the valve sleeve, a labyrinth sealing structure is arranged on the inner wall of the valve sleeve, a packing groove is formed in the inner portion of the valve rod and extends from the outer portion of one side of the valve sleeve, sealing packing is arranged in the packing groove, a jacking sleeve, an internal thread sleeve and a steering handle sleeve are sequentially arranged on the outer portion of the packing groove and sleeved on the valve rod, a ring cover is sleeved on the outer side of the jacking sleeve and connected with the valve sleeve in a threaded mode through a bolt, the bolt is fixed with the valve sleeve, a plurality of sliding grooves are axially formed in the outer wall of the jacking sleeve, the sliding grooves extend to the end portion of the jacking sleeve in the direction of the internal thread sleeve, a sliding block arranged in the sliding grooves in a sliding mode is fixed on the inner wall of the ring cover in the axial direction, and the steering handle sleeve is inserted into the internal thread sleeve, and is in threaded connection with the internal thread sleeve, and one end of the rudder sleeve is abutted against one end of the jacking sleeve.
Preferably, the sealing filler is formed by overlapping a plurality of layers of filler rings, and the filler rings are made of high-quality graphite serving as a base material.
Preferably, a ball is embedded in an end face of one end of the jacking sleeve, which is abutted against the rudder sleeve.
Preferably, the other end of the rudder sleeve, which is abutted against the jacking sleeve, extends outwards to form an annular boss, and an anti-skid groove is formed in the boss surface along the circumferential direction.
The utility model has the advantages that: the sealing filler made of graphite as a base material is soft in texture, and can be compressed and reset by the jacking sleeve in time after deformation is caused by the arrangement of the sealing filler, so that the phenomena of air leakage and abnormal sound caused by the increase of a sealing gap are avoided, and the safety is improved; and the top pressing sleeve compresses the sealing filler by using the rudder sleeve, so that the sealing filler is in place in one step, and the sealing filler is not complicated and is convenient to operate.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a perspective view of the press sleeve of FIG. 1;
FIG. 3 is a schematic perspective view of the ring cover of FIG. 1;
figure 4 is a perspective view of the rudder stock sleeve of figure 1.
In the figure: the valve sleeve comprises a valve sleeve 1, a valve rod 2, a labyrinth seal structure 3, a packing groove 4, a seal packing 5, a jacking sleeve 6, an internal thread sleeve 7, a tiller sleeve 8, a ring cover 9, a bolt 10, a sliding groove 11, a sliding block 12, a ball 13, a boss 14 and an anti-skidding groove 15.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 4, a steam turbine high pressure regulating valve rod sealing device comprises a valve sleeve 1, a valve rod 2 penetrating through the valve sleeve 1, a labyrinth seal structure 3 on the inner wall of the valve sleeve 1, a packing groove 4 extending from the outside to the inside of one side of the valve sleeve 1 on the inner wall of the valve sleeve 1, a labyrinth seal structure 3 at one third of the inner wall of the valve sleeve 1 in the axial direction can be ground flat by means of turning and other processing means to form an inward concave packing groove 4 structure, a sealing packing 5 is arranged in the packing groove 4, the sealing packing 5 is formed by overlapping a plurality of layers of packing rings, the packing rings are made of high quality graphite as base materials, the sealing packing 5 is attached and sealed with the valve rod 2, a jacking sleeve 6, an internal thread sleeve 7 and a rudder sleeve 8 which are sleeved on the valve rod 2 are sequentially arranged outside the packing groove 4, a ring cover 9 is sleeved outside the jacking sleeve 6, the ring cover 9 is screwed on the valve sleeve 1 through a bolt 10, the bolt 10 is fixed with the valve sleeve 1, the outer wall of the jacking sleeve 6 is axially provided with a plurality of sliding grooves 11, the sliding grooves 11 extend to the end part of the jacking sleeve 6 towards the direction of the internal thread sleeve 7, the inner wall of the ring cover 9 is fixed with a sliding block 12 which is arranged in the sliding grooves 11 in a sliding way, the internal thread sleeve 7 is axially fixed with the ring cover 9, the jacking sleeve 6 is inserted into the ring cover 9 from bottom to top, the sliding grooves 11 are sleeved on the corresponding sliding blocks 12, the sliding blocks 12 are used for limiting the jacking sleeve 6 in the circumferential direction, so that the jacking sleeve 6 can not rotate, the rudder sleeve 8 is inserted into the internal thread sleeve 7 and is in threaded connection with the internal thread sleeve 7, one end of the rudder sleeve 8 is abutted against one end of the jacking sleeve 6, the rudder sleeve 8 rotates in the internal thread sleeve 7, the rudder sleeve 8 moves downwards and drives the jacking sleeve 6 to move downwards, the sealing filler 5 can be compressed, and a ball 13 is embedded in the end face of the jacking sleeve 6 abutted against the rudder sleeve 8, roof pressure sleeve 6 passes through ball 13 and 8 end face contact of rudder sleeve, reduces the friction, and rudder sleeve 8 rotates more smoothly, and the other end of rudder sleeve 8 and 6 butts of roof pressure sleeve outwards extends has annular boss 14, and it is rotatory to grasp annular boss 14 and then drive rudder sleeve 8 through hand, and is more convenient, is equipped with anti-skidding recess 15 along circumference on the 14 mesas of boss, is difficult for taking off the hand.
The working principle is as follows: the utility model discloses when using, 5 laminating valve rods 2 of gland packing made for the substrate by graphite play sealed effect, when appearing erodeing and the thermal energy makes gland packing 5 warp, when leading to sealed not hard up, hold annular boss 14 with hand and drive 7 rotations of internal thread sleeve including rudderstock sleeve 8, make roof pressure sleeve 6 compress tightly gland packing 5 downwards, adjust the leakproofness of gland packing 5, when roof pressure sleeve 6 moves down, drive 11 covers of spout and slide on slider 12.
The sealing filler 5 made of graphite as a base material is soft, and the sealing filler 5 can be compressed and reset by the jacking sleeve 6 in time after being deformed, so that the phenomena of air leakage and abnormal sound caused by the increase of a sealing gap are avoided, and the safety is improved; and the top pressure sleeve 6 is used for pressing the sealing filler 5 by using the rudder sleeve 8, so that the method is in place in one step, is not complicated and is convenient to operate.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A valve rod sealing device of a high-pressure regulating valve of a steam turbine comprises a valve sleeve, a valve rod penetrating through the valve sleeve and a labyrinth sealing structure on the inner wall of the valve sleeve, and is characterized in that a packing groove is formed in the inner wall of the valve sleeve and extends into the valve sleeve from the outer part of one side of the valve sleeve, sealing packing is arranged in the packing groove, a jacking sleeve, an internal thread sleeve and a rudder sleeve sleeved on the valve rod are sequentially arranged outside the packing groove, a ring cover is sleeved outside the jacking sleeve and is screwed on the valve sleeve through a bolt, the bolt is fixed with the valve sleeve, a plurality of sliding grooves are axially arranged on the outer wall of the jacking sleeve, the sliding grooves extend to the end part of the jacking sleeve towards the direction of the internal thread sleeve, a sliding block arranged in the sliding grooves in a sliding mode is fixed on the inner wall of the ring cover, and the internal thread sleeve and the ring cover are axially fixed, the rudder sleeve is inserted into the internal thread sleeve and is in threaded connection with the internal thread sleeve, and one end of the rudder sleeve is abutted to one end of the jacking sleeve.
2. The steam turbine high pressure regulating valve stem seal assembly of claim 1, wherein: the sealing filler is formed by overlapping a plurality of layers of filler rings, and the filler rings are made of high-quality graphite serving as a base material.
3. The steam turbine high pressure regulating valve stem seal assembly of claim 2, wherein: and a ball is embedded in the end face of one end, abutted against the rudder sleeve, of the jacking sleeve.
4. The steam turbine high pressure regulating valve stem seal assembly of claim 3, wherein: the other end of the rudder sleeve, which is abutted against the jacking sleeve, extends outwards to form an annular boss, and an anti-skid groove is formed in the boss surface along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022560746.1U CN213871381U (en) | 2020-11-09 | 2020-11-09 | Valve rod sealing device of high-pressure regulating valve of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022560746.1U CN213871381U (en) | 2020-11-09 | 2020-11-09 | Valve rod sealing device of high-pressure regulating valve of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213871381U true CN213871381U (en) | 2021-08-03 |
Family
ID=77053758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022560746.1U Active CN213871381U (en) | 2020-11-09 | 2020-11-09 | Valve rod sealing device of high-pressure regulating valve of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213871381U (en) |
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2020
- 2020-11-09 CN CN202022560746.1U patent/CN213871381U/en active Active
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