CN218883021U

CN218883021U - High-pressure high-temperature stop valve for power station

Info

Publication number: CN218883021U
Application number: CN202223318243.9U
Authority: CN
Inventors: 徐红星; 杨勋寄; 董昕; 郑丰满; 周剑
Original assignee: Zhongcheng Valve Group Co ltd
Current assignee: Zhongcheng Valve Group Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-04-18
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a power station high pressure high temperature stop valve belongs to valve technical field, and it includes the valve body, the case is installed to the top seal of valve body, the surface of case runs through to slide has the valve rod, and the bottom of valve rod installs the valve clack. The valve core at the top is adopted to close the main body, the valve core and the valve body are kept pressed and held to be sealed through the graphite pressing ring through the sealing ring, meanwhile, the inner wall of the valve core keeps a sealing state through a filler to the sliding state of the valve rod, the sealing is divided into two independent sealing sections, the sealing pressure between the two sealing sections is realized by applying pressure to the baffle ring through the tooth screw on the surface of the bolt seat, the baffle is pressed and held on the surface of the four-open ring, the valve core has upward acting force, the sealing ring and the graphite pressing ring press and hold the four-open ring, the baffle ring pressed and held by the matched pressing screw realizes bidirectional force application, the pressing seat forms a clamping force with the bolt seat under the action of the clamping screw to press and hold the filler, and the stable sealing performance of the sliding of the valve rod is kept.

Description

High-pressure high-temperature stop valve for power station

Technical Field

The utility model belongs to the technical field of the valve, specifically speaking relates to power station high pressure high temperature stop valve.

Background

The stop valve is a tool which makes the sealing surface of the valve clack and the sealing surface of the valve seat tightly fit by the pressure of a valve rod to prevent medium from flowing, belongs to a forced sealing valve and is one of valves widely used.

The stop valve is one of the most widely used valves, and is characterized by small friction force between sealing surfaces in the opening and closing process, durability, small opening height, easy manufacture and convenient maintenance, and is suitable for medium and low pressure as well as high pressure. The closing principle of the stop valve is that the sealing surface of the valve clack is tightly attached to the sealing surface of the valve seat by means of the pressure of the valve rod, and the medium is prevented from flowing. The valve of China has been specified in the 'three-in-one' mode, and the flow direction of the stop valve is uniformly from top to bottom, so that the stop valve has directionality during installation. The structure length of stop valve is greater than the gate valve, and fluid resistance is big simultaneously, and long-term operation, sealing reliability is not strong.

In view of this, the present invention is provided.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model adopts the following basic concept:

a high-pressure high-temperature stop valve for a power station comprises a valve body, wherein a valve core is hermetically arranged at the top of the valve body, a valve rod penetrates through the surface of the valve core in a sliding manner, and a valve clack is arranged at the bottom end of the valve rod;

the inner wall of the valve body is clamped with four open rings, the upper surfaces of the four open rings are provided with baffle rings which are flush with the top of the valve body in a fitting manner, and the surface of the valve core is provided with a sealing ring which is in sealing fit with the inner wall of the valve body;

the inner wall of the valve core is filled with a filler for keeping the sliding seal of the valve rod, the surface of the valve core is clamped with two open rings, the two open rings are limited and fixed with a bolt seat, and a pressing screw for pressing and holding the baffle ring penetrates through the surface thread of the bolt seat;

a support is fixed on the upper surface of the valve body, and a driving structure used for being matched with a valve rod to drive is arranged at the top of the support.

As a further aspect of the present invention: the top of the valve core is provided with a pressing seat for pressing and holding the filler, and the surface of the bolt seat is fixedly penetrated with a clamping screw for keeping the pressing seat pressed downwards through a screw cap.

As a further aspect of the present invention: the drive structure includes the thread bush with valve rod surface screw-thread fit, the surface of thread bush rotates through two swivel bearing and connects at the top of support, and the top of support is provided with the bearing gland that is used for the swivel bearing restriction, the hand wheel is installed at the top of thread bush.

As a further aspect of the present invention: the lower surface laminating of four ring-opening is provided with the graphite clamping ring that is used for pressing to hold the sealing ring, the bottom of packing is provided with the heelpiece that is used for the bottom to rely on.

As a further aspect of the present invention: the valve seat matched and closed with the valve clack is integrally formed on the inner wall of the valve body, and a valve port for communication is formed in the surface of the valve seat.

As a further aspect of the present invention: the inner wall threaded connection of valve clack has the closing cap, the spacing joint in bottom of valve rod has and is used for the spacing ring opening of cooperation closing cap, the fixed surface of support has the leading truck that is used for the unable rotation of spacing valve rod.

Has the advantages that:

the valve body of the scheme adopts the valve core at the top to close the main body, the valve core and the valve body are kept pressed and sealed by the graphite pressing ring through the sealing ring, meanwhile, the inner wall of the valve core keeps a sealing state for the sliding state of the valve rod through the filler, the seal is divided into two independent sealing sections, the sealing pressure between the two sealing sections is realized by applying pressure to the baffle ring through the tooth screw on the surface through the bolt seat, so that the baffle is pressed and held on the surface of the four open rings, at the moment, the valve core has an upward acting force, so that the valve core is pressed and held on the four open rings through the sealing ring and the graphite pressing ring, the baffle ring pressed and held by the pressing screw is matched to realize bidirectional force application, and the valve core is kept fixed and is in a stable sealing effect;

meanwhile, the pressing seat and the bolt seat form a clamping force to press and hold the filler under the action of the clamping screw, so that the sliding stable sealing performance of the valve rod is kept.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

In the drawings:

fig. 1 is a schematic front sectional structure view of the present invention;

FIG. 2 is a schematic sectional view of the valve core of the present invention;

fig. 3 is a schematic structural view of the cross section of the driving structure of the present invention;

fig. 4 is an enlarged schematic structural diagram of a position a of the present invention.

In the figure: 1. a valve body; 2. a valve seat; 3. a valve port; 4. a valve clack; 5. a valve stem; 6. a valve core; 7. a drive structure; 71. a threaded sleeve; 72. a rotating bearing; 73. a bearing gland; 8. pressing a base; 9. a bolt seat; 10. a bottom pad; 11. a graphite pressing ring; 12. opening a ring; 13. a baffle ring; 14. opening a ring; 15. a seal ring; 16. pressing and holding the screw; 17. clamping the screw; 18. a flow channel; 19. a support; 20. a guide frame; 21. a filler; 22. a hand wheel; 23. a lock nut; 24. opening the ring; 25. and (7) sealing the cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention.

As shown in fig. 1 to 4, a high-pressure and high-temperature stop valve for a power station comprises a valve body 1, wherein a valve core 6 is hermetically installed at the top of the valve body 1, a valve rod 5 penetrates through the surface of the valve core 6 in a sliding manner, and a valve clack 4 is installed at the bottom end of the valve rod 5;

a four-open ring 12 is clamped on the inner wall of the valve body 1, a baffle ring 13 which is flush with the top of the valve body 1 is arranged on the upper surface of the four-open ring 12 in a fitting manner, and a sealing ring 15 which is in sealing fit with the inner wall of the valve body 1 is arranged on the surface of the valve core 6;

the inner wall of the valve core 6 is filled with a filler 21 for keeping the sliding seal of the valve rod 5, the surface of the valve core 6 is clamped with two open rings 14, the two open rings 14 are limited and fixed with a bolt seat 9, and a pressing screw 16 for pressing and holding the baffle ring 13 penetrates through the surface thread of the bolt seat 9;

a support 19 is fixed on the upper surface of the valve body 1, and a driving structure 7 used for being matched with the valve rod 5 for driving is arranged at the top of the support 19.

When the scheme is used, the valve core 6 passes through the progressive bolt seat 9 to fix the baffle ring 13, the baffle ring 13 presses and holds the four open rings 12 to enable the four open rings to carry out one-way pressure, the valve core 6 has an upward acting force under the action of the pressure, the valve core 6 enables the sealing ring 15 to be attached and pressed on the inner wall of the valve body 1, the graphite pressing ring 11 is pressed and held on the surfaces of the four open rings 12 by the sealing ring 15 to enable the four open rings to form two-way clamping force, and a stable pressure sealing state is formed between the valve core 6 and the valve body 1;

combining the sealed of case 6 and valve body 1, we can know through valve rod 5 position, and 6 inner walls of case have held packing 21 through heelpiece 10, and packing 21 receives simultaneously and presses seat 8 to extrude, makes its packing 21 with the surface laminating of valve rod 5 sealed all the time under wearing and tearing, presses here to realize the clamp force cooperation under seat 8 passes through the cooperation of nut with clamping screw 17, can satisfy the pressure regulation under the wearing and tearing of packing 21.

In combination with the above-described manner, it can be seen that the seal is reliable and has better durability over long periods of operation.

Specifically, as shown in fig. 2, a pressing seat 8 for pressing and holding a packing 21 is provided on the top of the valve body 6, and a clamping screw 17 for holding the pressing seat 8 pressed down by a nut is fixed to the surface of the bolt seat 9.

Through the arrangement of the clamping screw 17, the clamping screw 17 keeps the pressure provided by the pressure seat 8 under the action of a nut, the pressure comes from the bolt seat 9, the bolt seat 9 is fixed on the surface of the valve core 6 and is limited and pressed through the two open rings 14, so that the surface of the valve core 6 can be stressed.

Specifically, as shown in fig. 3, the driving structure 7 includes a threaded sleeve 71 in threaded fit with the surface of the valve stem 5, the surface of the threaded sleeve 71 is rotatably connected to the top of the bracket 19 through two rotating bearings 72, the top of the bracket 19 is provided with a bearing gland 73 for limiting the rotating bearings 72, and the top of the threaded sleeve 71 is provided with the hand wheel 22.

By providing the threaded sleeve 71, the threaded sleeve 71 can be rotated by the inner wall of the rotary bearing 72, and the lower stem 5 can be moved up and down by screwing the threaded sleeve, and by providing the bearing cover 73, the bearing cover 73 can be fixed to the rotary bearing 72.

Specifically, as shown in fig. 2, a graphite pressing ring 11 for pressing the sealing ring 15 is attached to the lower surface of the four-open ring 12, and a bottom pad 10 for bottom support is provided at the bottom of the filler 21.

Through setting up four ring-opening 12, four ring-opening 12 are the circular ring-type that four half arc sections are constituteed, can block into the inner wall of valve body 1 respectively, and through setting up heelpiece 10, heelpiece 10 can keep placing and hold in the palm the end to packing 21.

Specifically, as shown in fig. 4, a valve seat 2 that is closed by matching with a valve flap 4 is integrally formed on the inner wall of the valve body 1, and a valve port 3 for communication is opened on the surface of the valve seat 2.

Through setting up disk seat 2, disk seat 2 can with cooperate between the valve plate, make it carry out on-off control, the valve port 3 on disk seat 2 surface can keep the circulation of liquid simultaneously.

Specifically, as shown in fig. 4, the inner wall of the valve flap 4 is connected with a sealing cover 25 through a thread, the bottom end of the valve rod 5 is clamped with a split ring 24 for limiting the sealing cover 25, and the surface of the support 19 is fixed with a guide frame 20 for limiting the rotation of the valve rod 5.

By providing the cover 25, the cover 25 can be fixed to the inner wall of the valve plate, and by pressing and holding the split ring 24, the valve plate can be connected to and fixed to the valve rod 5.

When the guide frame 20 can keep the threaded sleeve 71 to rotate, the valve rod 5 is limited, only the vertical movement can be realized, and the rotation cannot occur.

The working principle is as follows:

when the valve plate is used, the hand wheel 22 is rotated, the hand wheel 22 drives the threaded sleeve 71 to rotate on the surfaces of the rotary bearing 72 and the support 19, so that the valve rod 5 slides on the inner wall of the valve core 6 when moving up and down under the support of the guide frame 20, and the distance between the valve plate and the valve seat 2 is driven to change, so that control can be realized.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The high-pressure high-temperature stop valve for the power station is characterized by comprising a valve body (1), wherein the top of the valve body (1) is hermetically provided with a valve core (6), the surface of the valve core (6) is penetrated and slid by a valve rod (5), and the bottom end of the valve rod (5) is provided with a valve clack (4);

the inner wall of the valve body (1) is clamped with four open rings (12), the upper surfaces of the four open rings (12) are provided with baffle rings (13) which are flush with the top of the valve body (1) in a fitting manner, and the surface of the valve core (6) is provided with a sealing ring (15) which is in sealing fit with the inner wall of the valve body (1);

the inner wall of the valve core (6) is filled with a filler (21) for keeping the valve rod (5) in a sliding sealing mode, the surface of the valve core (6) is clamped with two open rings (14), a bolt seat (9) is fixed to the two open rings (14) in a limiting mode, and a pressing screw (16) for pressing the baffle ring (13) penetrates through the surface of the bolt seat (9) in a threaded mode;

a support (19) is fixed on the upper surface of the valve body (1), and a driving structure (7) used for being matched with the valve rod (5) to drive is arranged at the top of the support (19).

2. The high-pressure high-temperature stop valve for the power station as claimed in claim 1, characterized in that a pressing seat (8) for pressing and holding the packing (21) is arranged at the top of the valve core (6), and a clamping screw (17) for keeping the pressing seat (8) pressed down through a nut is fixedly penetrated on the surface of the bolt seat (9).

3. A high-pressure and high-temperature stop valve for power station according to claim 1, characterized in that the driving structure (7) comprises a threaded sleeve (71) in threaded fit with the surface of the valve rod (5), the surface of the threaded sleeve (71) is rotatably connected to the top of the bracket (19) through two rotary bearings (72), a bearing gland (73) for limiting the rotary bearings (72) is arranged at the top of the bracket (19), and a hand wheel (22) is mounted at the top of the threaded sleeve (71).

4. The high-pressure and high-temperature stop valve for the power station as claimed in claim 2, characterized in that a graphite pressing ring (11) for pressing and holding the sealing ring (15) is attached to the lower surface of the four-open ring (12), and a bottom pad (10) for bottom support is arranged at the bottom of the filler (21).

5. A high-pressure and high-temperature stop valve for a power station according to claim 3, characterized in that the inner wall of the valve body (1) is integrally formed with a valve seat (2) which is closed by matching with the valve flap (4), and the surface of the valve seat (2) is provided with a valve port (3) for communication.

6. A high-pressure and high-temperature stop valve for a power station as claimed in claim 5, characterized in that the inner wall of the valve clack (4) is in threaded connection with a sealing cover (25), a split ring (24) for matching with the limiting of the sealing cover (25) is clamped at the bottom end of the valve rod (5), and a guide frame (20) for limiting the non-rotation of the valve rod (5) is fixed on the surface of the support (19).