CN211875143U

CN211875143U - Manual gate valve of ultralow moment of torsion

Info

Publication number: CN211875143U
Application number: CN202020386777.7U
Authority: CN
Inventors: 陈坪; 谭千洪; 谭治芳
Original assignee: Zhejiang Oulotaike Valve Co ltd
Current assignee: Zhejiang Oulotaike Valve Co ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2020-11-06
Anticipated expiration: 2030-03-24

Abstract

The utility model discloses an ultralow moment of torsion manual gate valve, including valve body, valve plate, valve rod and valve gap, the top flange joint of valve body has the valve gap, and flange joint is provided with well flange gasket, the bolt has been inserted to angle ann such as flange joint in the well flange gasket outside, and all overlaps at the upper and lower both ends of bolt and be equipped with hexagon nut, the top cover of valve rod is equipped with interior nut, and interior nut's top cover is equipped with the hand wheel to the valve rod from the top down passes the valve gap and extends to the middle part of valve body, the central point of valve body bottom puts the department and is provided with the valve plate, and the top of valve plate and the bottom fixed connection of valve rod. This manual gate valve of ultralow moment of torsion not only passes through thrust bearing's design conversion switching mode for the switching moment of torsion reduces about 50%, thereby has realized the light switching of this gate valve, and through setting up lubricated pad of metal, high performance filler, further reduce the moment of torsion and reduce coefficient of friction moreover.

Description

Manual gate valve of ultralow moment of torsion

Technical Field

The utility model relates to a gate valve technical field specifically is an ultralow moment of torsion manual gate valve.

Background

At present, the opening and closing part of the common gate valve mainly applied to petroleum, petrochemical, chemical, electric, steam and heat conducting oil systems is a gate plate, the moving direction of the gate plate is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. The gate has two sealing surfaces, the two sealing surfaces of the most common mode gate valve form a wedge shape, the wedge angle is different with the valve parameters, usually 5 degrees, and the medium temperature is 3 degrees when not high.

Most gate valves adopt forced sealing, namely when the valve is closed, the gate plate is forced to press towards the valve seat by means of external force, so that the sealing performance of a sealing surface is ensured. The gate plate of the gate valve moves linearly along with the valve rod, and is called a lifting rod gate valve and a rising rod gate valve. Usually, the lifting rod is provided with trapezoidal threads, and the rotating motion is changed into the linear motion, namely the operation torque is changed into the operation thrust force through a nut at the top end of the valve and a guide groove on the valve body. When the valve is opened, when the lifting height of the flashboard is equal to 1:1 times of the drift diameter of the valve, the passage of the fluid is completely unblocked. Therefore, the fully open position of the valve is determined by the position, i.e., stroke, of the shutter plate.

However, in the process of opening or closing the valve, the valve is influenced by the pressure of the inner cavity of the valve body and the self-tightening force and the friction force of the stuffing box, the torque for opening or closing the valve is very large, and the operation is difficult.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides an ultralow moment of torsion manual gate valve possesses thrust bearing, the lubricated pad of metal and high performance advantage of structures such as filler to solve the problem that proposes among the above-mentioned background art.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an ultralow moment of torsion manual gate valve, includes valve body, valve plate, valve rod and valve gap, the top flange joint of valve body has the valve gap, and flange joint department is provided with well flange gasket, the bolt has been inserted to angle ann such as the flange joint in well flange gasket outside, and the upper and lower both ends of bolt all overlap and are equipped with hexagon nut, the top cover of valve rod is equipped with interior nut, and interior nut's top cover is equipped with the hand wheel to the valve rod from the top down passes the valve gap and extends to the middle part of valve body, the central point of valve body bottom puts the department and is provided with the valve plate, and the bottom fixed connection of the top of valve plate and valve rod.

Preferably, sealing surfaces are attached to the left inner side wall and the right inner side wall of the bottom of the valve body and the left outer side wall and the right outer side wall of the valve plate.

Preferably, the packing is filled in the middle-lower part of the valve cover outside the valve rod, and the gland is installed above the packing.

Preferably, a connecting pair is inserted into one side of the top of the gland, and the bottom end of the connecting pair is rotatably connected with the outer side wall of the valve cover.

Preferably, the middle lower part of the inner nut is positioned at the top of the valve cover, and the bottom end of the inner nut is in contact with the valve cover through a metal lubricating pad.

Preferably, the bottom of the inner nut is rotatably connected with the valve cover through a bearing.

(III) advantageous effects

Compared with the prior art, the utility model provides an ultralow moment of torsion manual gate valve possesses following beneficial effect:

1. according to the ultra-low torque manual gate valve, the inner nut and the valve cover are in rotating connection through the bearing, so that the valve rod is converted into a plane rotation mode from spiral lifting, the opening and closing torque of the valve plate is reduced by about%, and the gate valve is opened and closed easily;

2. according to the ultralow-torque manual gate valve, the metal lubricating pad is additionally arranged between the inner nut and the valve cover, so that the friction coefficient of the bearing is reduced, and the high-performance filler is filled in the valve cover outside the valve rod, so that the friction coefficient of the valve rod is reduced, and the torque is further reduced, and the friction damage is reduced.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic view of the enlarged structure of the main view section of the present invention.

In the figure: 1. a valve body; 2. a sealing surface; 3. a valve plate; 4. a valve stem; 5. a middle flange gasket; 6. a hexagonal nut; 7. a bolt; 8. a valve cover; 9. a filler; 10. a gland; 11. a metal lubricating pad; 12. an inner nut; 13. a bearing; 14. a handwheel.

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.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides an ultralow moment of torsion manual gate valve, including valve body 1, valve plate 3, valve rod 4 and valve gap 8, the top flange joint of valve body 1 has valve gap 8, and flange joint is provided with well flange gasket 5, the equal angle of flange joint in the 5 outsides of well flange gasket has inserted bolt 7, and the upper and lower both ends of bolt 7 all overlap and are equipped with hexagon nut 6, the top cover of valve rod 4 is equipped with interior nut 12, and the top cover of interior nut 12 is equipped with hand wheel 14, and valve rod 4 from the top down passes valve gap 8 and extends to the middle part of valve body 1, the central point of valve body 1 bottom puts the department and is provided with valve plate 3, and the top of valve plate 3 and the bottom fixed connection of valve rod 4.

As shown in fig. 2, sealing surfaces 2 are attached to the left and right inner side walls of the bottom of the valve body 1 and the left and right outer side walls of the valve plate 3 for complete sealing.

As shown in fig. 2, the packing 9 is filled in the middle and lower part of the bonnet 8 outside the valve rod 4 to reduce the friction coefficient of the valve rod 4, and the gland 10 is installed above the packing 9 to prevent the packing 9 from leaking.

As shown in figure 2, a connecting pair is inserted at one side of the top of the gland 10, and the bottom end of the connecting pair is rotatably connected with the outer side wall of the valve cover 8, so that the gland 10 is not completely detached and the packing 9 is filled.

As shown in fig. 2, the middle-lower portion of the inner nut 12 is located at the top of the valve cover 8, and the bottom end of the inner nut 12 is interconnected with the valve cover 8 through a metal lubricating pad 11 for reducing the friction coefficient contact of the bearing 13.

The bottom of the inner nut 12 is rotatably connected with the valve cover 8 through a bearing 13 as shown in fig. 2, and is used for converting a rotating mode and greatly reducing torque.

The working principle is as follows: when the novel gate valve is used, an operator can rotate the hand wheel 14 by screwing to enable the inner nut 12 at the top of the valve rod 4 to rotate relative to the valve cover 8 through the bearing 13, so that the valve plate 3 at the bottom end of the valve rod 4 rotates synchronously in the valve body 1, the flow in the valve body 1 is adjusted through the size of a staggered gap between the sealing surfaces 2, compared with a traditional spiral lifting gate valve, the switching torque of the valve plate 3 can be reduced by about 50%, and the novel gate valve can be opened and closed easily by means of one finger;

in addition, the metal lubricating pad 11 is additionally arranged between the inner nut 12 and the valve cover 8 to reduce the friction coefficient of the bearing 13, and the high-performance filler 9 is filled in the valve cover 8 on the outer side of the valve rod 4 to reduce the friction coefficient of the valve rod 4, so that the torque is further reduced, the friction damage is reduced, and finally the whole work of the ultra-low torque manual gate valve is completed.

In conclusion, this manual gate valve of ultralow moment of torsion not only passes through thrust bearing's design conversion switching mode for the switching moment of torsion reduces about 50%, thereby has realized the light switching of this gate valve, and through setting up metal lubrication pad, high performance filler, further reduce the moment of torsion and reduce the friction damage moreover.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an ultralow moment of torsion manual gate valve, includes valve body (1), valve plate (3), valve rod (4) and valve gap (8), its characterized in that: the top flange joint of valve body (1) has valve gap (8), and flange joint is provided with well flange gasket (5), the flange joint equal angle in well flange gasket (5) outside has inserted bolt (7), and the upper and lower both ends of bolt (7) all overlap and be equipped with hexagon nut (6), the top cover of valve rod (4) is equipped with interior nut (12), and the top cover of interior nut (12) is equipped with hand wheel (14) to valve rod (4) from the top down passes valve gap (8) and extends to the middle part of valve body (1), the central point of valve body (1) bottom puts the department and is provided with valve plate (3), and the bottom fixed connection of the top of valve plate (3) and valve rod (4).

2. An ultra low torque manual gate valve as defined in claim 1 wherein: sealing surfaces (2) are attached to the left inner side wall and the right inner side wall of the bottom of the valve body (1) and the left outer side wall and the right outer side wall of the valve plate (3).

3. An ultra low torque manual gate valve as defined in claim 1 wherein: the middle lower part of the valve cover (8) on the outer side of the valve rod (4) is filled with packing (9), and a gland (10) is arranged above the packing (9).

4. An ultra low torque manual gate valve as defined in claim 3 wherein: one side of the top of the gland (10) is provided with a connecting pair in an inserting mode, and the bottom end of the connecting pair is rotatably connected with the outer side wall of the valve cover (8).

5. An ultra low torque manual gate valve as defined in claim 1 wherein: the middle lower part of the inner nut (12) is positioned at the top of the valve cover (8), and the bottom end of the inner nut (12) is in mutual contact with the valve cover (8) through a metal lubricating pad (11).

6. An ultra low torque manual gate valve as defined in claim 1 wherein: the bottom of the inner nut (12) is rotatably connected with the valve cover (8) through a bearing (13).