CN211288786U

CN211288786U - Octagonal force transmission valve shaft structure for valve

Info

Publication number: CN211288786U
Application number: CN201922345604.0U
Authority: CN
Inventors: 韦建新; 金胜利; 丁红强
Original assignee: Zhengzhou Yivalve Fluid Technology Co ltd
Current assignee: Zhengzhou Yivalve Fluid Technology Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-08-18
Anticipated expiration: 2029-12-20

Abstract

The utility model relates to a valve field, concretely relates to octagon biography power valve shaft structure for valve. The valve shaft structure comprises a valve body and a valve core, the valve core is rotatably arranged in the valve cavity through the valve shaft, the valve shaft is provided with a driving connecting part and a rotation stopping connecting part, the rotation stopping connecting part is an octagonal force transmission structure, the valve body is provided with a limiting table, the valve body is provided with a limiting part which is matched with the limiting table in a stopping way so as to limit the valve shaft in the valve body, and the transmission is realized through the octagonal force transmission structure, so that the problem that the strength of the valve shaft is affected by the hollow-out arranged on the valve shaft due to the adoption of pin shaft transmission is solved, meanwhile, the limiting part can limit the valve shaft on the valve body, and the upper valve shaft is prevented; in addition, the installation position of the valve driving device can be adjusted according to the field space after the octagonal force transmission structure is adopted, and the adaptability of the valve is improved.

Description

Octagonal force transmission valve shaft structure for valve

Technical Field

The utility model relates to a valve field, concretely relates to octagon biography power valve shaft structure for valve.

Background

The valve plays the role of adjusting and intercepting in pipelines and equipment, and has wide application in the fields of petroleum, chemical industry, electric power, urban water supply and drainage and the like. In the prior art, a traditional valve shaft system small-caliber part pin-free structure is adopted, and a pin-free reversible shaft system for a large-caliber valve is still blank.

On the rotary seal valve structures such as butterfly valves, semi-spherical valves and the like, particularly butterfly valves, the connection between a valve shaft and a valve core basically adopts cylindrical and conical pin connection, although the structure form is also available, the structure form basically adopts the structures such as single-key force transmission, involute spline force transmission, prestress assembly and the like, and the structure form brings a lot of difficulties for processing and part manufacturing, particularly large caliber.

In the installation and use processes of the pinless valve, the pin shaft is not needed to be matched with the valve core, and in the use process, the strong influence of the pin shaft on the hollow cutting of the driving valve shaft is eliminated, so that the service life of the valve shaft is relatively prolonged. The national requirements of energy conservation and consumption reduction are responded, and the product quality is improved while the production cost is not increased. The valve driving shafting structure can avoid the loosening and falling of the pin shaft caused by medium corrosion or flow velocity pressure difference and other factors in the valve operation process while omitting the pin shaft matched with the valve shaft and the valve core, thereby ensuring the reliability in the valve operation process and providing guarantee for the safe operation of a pipe network.

Therefore, it is desirable to provide a valve shaft structure with simple structure and stability.

SUMMERY OF THE UTILITY MODEL

The utility model provides an octagon biography power valve shaft structure for valve to guarantee the reliability of valve operation in-process.

The utility model discloses an eight anise pass power valve shaft structure for valve adopts following technical scheme:

the valve shaft is provided with a drive connecting part which stretches to the outside of the valve cavity and is used for being connected with a valve driving device, and a rotation stopping connecting part which stretches into the valve cavity and is connected with the valve core through a rotation stopping structure, wherein the rotation stopping connecting part is of an octagonal force transmission structure, the valve body is provided with a limiting table, and the valve body is provided with a limiting part which is matched with the limiting table in a stopping way so as to limit the valve shaft in the stopping way on the valve body.

The limiting part is a packing pan, shaft sealing filler is arranged between the packing pan and the limiting table, and one end, deviating from the packing pan, of the shaft sealing filler is in stop limit fit with the limiting table.

The shaft seal packing is characterized in that the packing disc is matched with the shaft seal packing in a jacking and blocking mode through a packing sleeve, and a valve shaft check ring is arranged between the shaft seal packing and the limiting table.

A sliding bearing is arranged between the valve shaft and the valve body.

And a sealing ring for preventing foreign matters from entering is arranged at the end part of the sliding bearing.

The valve shaft is sleeved with a central positioning sleeve assembly, one end of the central positioning sleeve assembly is in blocking fit with the inner wall of the valve cavity, and the other end of the central positioning sleeve assembly is in blocking fit with the valve core.

The center locating sleeve assembly comprises three center locating sleeves arranged side by side.

The octagonal force transmission structure is an octagonal spline structure.

The valve shaft is a split valve shaft comprising an upper valve shaft and a lower valve shaft, the driving connecting part is arranged on the upper valve shaft, and the octagonal force transmission structures are arranged on the lower valve shaft and the upper valve shaft; the valve shaft is of a through shaft structure, and the rotation stopping connecting part is arranged at the upper part of the through shaft.

The valve core is a butterfly plate.

The utility model has the advantages that: the utility model discloses an eight angle biography power valve shaft structure for valve includes valve body and the case that has the valve pocket, the case rotates through the valve shaft to be set up in the valve pocket, the valve shaft has the overhang to the valve pocket outside, be used for the drive connection portion of being connected with valve drive arrangement and go deep into the valve pocket and pass through the rotation stopping structural connection's with the case and connect the rotation stopping connection portion, the rotation stopping connection portion is eight angle biography power structure, be equipped with spacing platform on the valve body, be equipped with on the valve body and be used for with spacing platform stop cooperation in order to restrict the valve shaft stop the locating part on the valve body, because adopt eight angle biography power structure to realize the transmission, avoid adopting pin roll transmission to cause set up the problem that the fretwork caused on the valve shaft causes the influence to the intensity of valve shaft, simultaneously, the locating part can; in addition, the installation position of the valve driving device can be adjusted according to the field space after the octagonal force transmission structure is adopted, and the adaptability of the valve is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 inventive exercise.

Fig. 1 is a schematic structural diagram of embodiment 1 of the valve of the present invention;

FIG. 2 is an enlarged fragmentary view at an upper position in FIG. 1;

FIG. 3 is an enlarged view of a portion of the central locating sleeve;

FIG. 4 is a partial enlarged view of the lower portion;

FIG. 5 is a schematic view of an octagonal force transfer structure;

fig. 6 is a schematic structural view of embodiment 2 of the valve of the present invention;

fig. 1 to 4 correspond to embodiment 1, in which: 1. a connecting seat; 2. a packing pan bolt; 3. a stuffing box nut; 4. a stuffing disc; 5. a stuffing sleeve; 6. a shaft seal packing; 7. an upper valve shaft retainer ring; 8. an upper shaft sleeve; 9. a butterfly plate sealing ring; 10. a butterfly plate; 11. a valve shaft; 12. a butterfly plate pressing plate; 13. adjusting the bolt; 14. a central positioning sleeve; 15. sealing the shaft sleeve; 16. a lower shaft sleeve; 17. a lower valve shaft retainer ring; 18. an end cap; 21. a first center locating sleeve; 22. a second center locating sleeve; 23. a third center locating sleeve;

FIG. 5 corresponds to example 2, in which: 12. a butterfly plate pressing plate; 13. adjusting the bolt; 14. a central positioning sleeve; 15. sealing the shaft sleeve; 16. a lower shaft sleeve; 17. a valve shaft retainer ring; 18. and (4) end covers.

Detailed Description

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 work belong to the protection scope of the present invention.

The utility model discloses an embodiment of valve, as shown in fig. 1 to 5, a valve, including valve body and the case that has the valve pocket, the case passes through the valve shaft and rotates the setting in the valve pocket, and in this embodiment, the valve shaft includes the split type valve shaft of last valve shaft and lower valve shaft, is connected with through the structure transmission of splining to hang to stretch the valve pocket outside last valve shaft on the case, and the structure of splining is including setting up the octagon force transmission structure on last valve shaft and setting up the octagon hole on the case, is equipped with the mounting hole on the valve body, goes up to be equipped with spacing platform on the valve shaft, is equipped with on the valve body to be used for the locating part of spacing bench. Wherein eight star anise pass force structure and eight star anise holes are corresponding valve eight star anise pass force valve shaft structure promptly, and eight star anise pass force structure specifically is the eight star anise spline structure who sets up at last valve shaft 11 lower extreme, and of course, in other embodiments, eight star anise pass force structure still can be eight star anise cylindricality structures. The lower valve shaft is also connected with the valve core through an octagonal force transmission structure. In this embodiment, the valve core is a butterfly plate 10, a butterfly plate seal ring 9 is provided on the butterfly plate 10, the butterfly plate seal ring 9 is press-fitted on the butterfly plate through a butterfly plate press plate 12 and an adjusting bolt 13, and a corresponding mating seal ring is also provided on the valve body, where the butterfly plate, the butterfly plate seal ring, and the butterfly plate are typical butterfly valve structures and are only used for illustration here.

In this embodiment, spacing platform is for the ring platform that winds valve shaft circumference and set up, can make the valve shaft atress of going up even like this, avoids the card dead, improves the stability in the use.

In order to adapt to the ring platform and ensure the limiting effect, in the embodiment, the limiting part is a packing disc 4 sleeved on the upper valve shaft. The upper end of the packing pan 4 is provided with a flanging extending outwards, the flanging can be used for installing the packing pan bolt 2 and the packing pan nut 3, and a gap is formed between the flanging and the valve body.

In this embodiment, be equipped with shaft seal filler 6 and packing cover 5 between packing dish 4 and the spacing platform, can guarantee the leakproofness between packing dish 4 and the spacing platform like this to stability is improved.

Considering that there may be a certain gap between the upper valve shaft and the mounting hole, and some foreign matters may enter into the valve cavity, in this example, a sliding bearing is provided between the upper valve shaft and the hole wall of the mounting hole, and the sliding bearing is substantially an upper bushing 8, so that the gap between the upper valve shaft and the mounting hole can be eliminated by the sliding bearing, and the reliability of the sliding fit is ensured. In addition, the upper end of the sliding bearing is provided with an upper valve shaft retainer ring 7, the lower end of the sliding bearing is provided with an upper shaft sleeve sealing ring, and the sliding bearing is sealed, so that foreign matters are prevented from entering the sliding bearing to influence the action of the valve. The lower valve shaft is also provided with a lower shaft sleeve 16, the two ends of the lower shaft sleeve 16 are respectively provided with a lower shaft sleeve seal 15 and a lower valve shaft retainer ring 17, and the lower shaft sleeve 16 is also sealed to prevent foreign matters from entering the sliding bearing to influence the valve action.

In order to center the upper valve shaft, in this embodiment, a center positioning sleeve assembly 14 is sleeved on the upper valve shaft, one end of the center positioning sleeve assembly 14 is in stop fit with the inner wall of the valve cavity, and the other end is in stop fit with the valve core.

The central positioning sleeve assembly 14 comprises three central positioning sleeves arranged side by side, namely a first central positioning sleeve 21, a second central positioning sleeve 22 and a third central positioning sleeve 23, so that the size precision can be ensured, because the length and the size of the central positioning sleeve assembly 14 need high precision, if one central positioning sleeve is used, the machining precision requirement on the central positioning sleeve is very high, after two central positioning sleeves are adopted, each central positioning sleeve has different machining errors, and the errors have different sizes, so that the corresponding size requirement can be met through the matching of the central positioning sleeves with different errors, the machining difficulty is reduced, and the manufacturing cost is reduced.

The lower extreme of valve shaft is provided with down the valve shaft through the cooperation in shaft hole, also overlaps on the lower valve shaft to be equipped with three center locating cover, and its effect is the same with the effect of two center locating covers on the last valve shaft, consequently, no longer gives unnecessary details. Meanwhile, a sliding bearing is sleeved on the lower valve shaft, and the end cover 18 stops and limits the lower valve shaft in the valve body.

The utility model discloses an octagon force transfer valve shaft structure of valve realizes the transmission owing to the cooperation that adopts octagon force transfer structure and octagon hole, avoids adopting the valve shaft fretwork that the round pin shaft drive caused to cause the problem of influence to the structural strength of valve shaft, and simultaneously, the locating part can be with last valve shaft restriction in the mounting hole, avoids valve pocket internal pressure too big to blow off last valve shaft to the reliability has been improved. The connecting seat 1 is arranged on the upper side of the valve body and is used for connecting a valve driving mechanism.

The utility model discloses an embodiment 2, as shown in fig. 6, in this embodiment, the valve shaft adopts logical axle construction, and the spline connecting portion of valve shaft are eight aniseed power transmission structure settings promptly and locate in the upper portion position that leads to the axle construction, realize leading to the transmission of axle construction and case and connect, and other structures are the same with embodiment 1, no longer describe herein.

In other embodiments of the utility model, the limiting table can also be a boss arranged at intervals; the packing disc can be arranged into a split structure; the filler tray can also be directly matched with the filler in a jacking way; the number of the sliding bearings and the central positioning sleeve can be specifically set according to requirements.

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

1. The utility model provides an anise passes power valve shaft structure for valve which characterized in that: the valve comprises a valve body and a valve core, wherein the valve core is arranged in the valve cavity in a rotating mode through a valve shaft, the valve shaft is provided with a driving connecting part which stretches to the outside of the valve cavity and is used for being connected with a valve driving device, and a rotation stopping connecting part which stretches into the valve cavity and is connected with the valve core through a rotation stopping structure, the rotation stopping connecting part is of an octagonal force transmission structure, a limiting table is arranged on the valve body, and a limiting part which is used for being matched with the limiting table in a stopping mode to limit the valve shaft on the valve body is arranged on the valve body.

2. The octagonal force-transmitting valve shaft structure for valves according to claim 1, wherein: the limiting part is a packing pan, shaft sealing filler is arranged between the packing pan and the limiting table, and one end, deviating from the packing pan, of the shaft sealing filler is in stop limit fit with the limiting table.

3. The octagonal force-transmitting valve shaft structure for valves according to claim 2, wherein: the shaft seal packing is characterized in that the packing disc is matched with the shaft seal packing in a jacking and blocking mode through a packing sleeve, and a valve shaft check ring is arranged between the shaft seal packing and the limiting table.

4. An octagonal force-transmitting valve shaft structure for a valve according to any one of claims 1 to 3, wherein: a sliding bearing is arranged between the valve shaft and the valve body.

5. The octagonal force-transmitting valve shaft structure for valves according to claim 4, wherein: and a sealing ring for preventing foreign matters from entering is arranged at the end part of the sliding bearing.

6. An octagonal force-transmitting valve shaft structure for a valve according to any one of claims 1 to 3, wherein: the valve shaft is sleeved with a central positioning sleeve assembly, one end of the central positioning sleeve assembly is in blocking fit with the inner wall of the valve cavity, and the other end of the central positioning sleeve assembly is in blocking fit with the valve core.

7. The octagonal force-transmitting valve shaft structure for valves according to claim 6, wherein: the center locating sleeve assembly comprises three center locating sleeves arranged side by side.

8. An octagonal force-transmitting valve shaft structure for a valve according to any one of claims 1 to 3, wherein: the octagonal force transmission structure is an octagonal spline structure.

9. An octagonal force-transmitting valve shaft structure for a valve according to any one of claims 1 to 3, wherein: the valve shaft is a split valve shaft comprising an upper valve shaft and a lower valve shaft, the driving connecting part is arranged on the upper valve shaft, and the octagonal force transmission structures are arranged on the lower valve shaft and the upper valve shaft; the valve shaft is of a through shaft structure, and the rotation stopping connecting part is arranged at the upper part of the through shaft.

10. An octagonal force-transmitting valve shaft structure for a valve according to any one of claims 1 to 3, wherein: the valve core is a butterfly plate.