CN211315200U

CN211315200U - Novel combined sealed fireproof ball valve

Info

Publication number: CN211315200U
Application number: CN201922301233.6U
Authority: CN
Inventors: 徐其波; 刘铁星; 史志学; 刘鸿儒
Original assignee: Suzhou Huagen Valve Co ltd
Current assignee: Suzhou Huagen Valve Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-21
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a novel combination sealed fire prevention ball valve, including the valve body, set up in the valve body and set up the piece that opens and shuts, the piece that opens and shuts enables the inside fluid passage of valve body and cuts or communicate, and the piece that opens and shuts still is connected with the valve rod, and the valve rod passes the valve body and exposes the valve body, sets up first sealing member between valve rod and valve body, and first sealing member is lip seal, and still is provided with graphite packing between valve rod and valve body, is provided with second seal assembly in the position of disk seat, and second seal assembly enables between disk seat and the piece that opens and shuts sealedly. Adopt novel combined SEAL structure, increase LIP-SEAL sealing washer, adopt the material such as PTFE/RPTFE that can be used to the ultra-low temperature operating mode, effectively prevent revealing of valve rod and disk seat position, under the condition of using with the graphite SEAL combination, improved sealing performance to the medium effort that the graphite SEAL bore has been obstructed, effectively protected the graphite SEAL, avoided the graphite loss of graphite SEAL, prolonged the life of sealing washer.

Description

Novel combined sealed fireproof ball valve

Technical Field

The utility model relates to a ball valve equipment field especially relates to a novel combination sealed fire prevention ball valve of high canned type.

Background

The fire prevention ball valve is the fixed ball structural style, and the upstream end is sealed for main seal, and under sealed intact circumstances, the valve is under the full-open or the full-close state, can observe whether upstream disk seat has the leakage through lumen drain or drain. Pipeline ball valve is under normal use, and the lumen is not pressed in the area, and when the fire incident, reasonable in design's disk seat fire resistive construction can slow down the progress that upstream pressure medium got into the lumen, avoids leaking outward and interior hourglass because of the lumen steps up and arouses the medium, has good fire resistive construction design's disk seat, is the initiative measure that guarantees that the pipeline ball valve has safe fire behavior. In the fireproof structure design, the design of the valve seat fireproof structure is key, the fireproof performance of the valve seat is good, and the pressure of the fireproof structure design among the valve rod fireproof structure, the valve body and the left and right bodies can be reduced in a fire accident state.

The existing fireproof ball valve generally adopts a rubber valve seat and metal fixer structure, a graphite sealing ring is adopted between the metal fixer and the valve body for sealing, and the valve rod part adopts a sealing structure of graphite packing.

Therefore, the inventor of the utility model aims at inventing a novel combined sealing type fireproof ball valve aiming at the problem that the poor sealing performance is caused by the loss of graphite components.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model aims to provide a novel combined sealed fireproof ball valve.

In order to achieve the above purpose, the utility model discloses a technical scheme is: a novel combined sealing type fire-proof ball valve comprises a valve body, a fluid channel is arranged in the valve body, a valve seat is arranged in the fluid passage, an opening and closing piece is arranged on the valve seat, the opening and closing piece is a sphere, the opening and closing piece can cut off the fluid passage, and the center of the opening and closing piece is provided with a through hole, the opening and closing piece is also connected with a valve rod, the valve rod passes through the valve body and is exposed out of the valve body, and under the action of external force, the valve rod can drive the opening and closing piece to rotate, so that the through hole of the opening and closing piece is communicated with the fluid channel, a first sealing element is arranged between the valve rod and the valve body, the first sealing element is a lip-shaped sealing ring, graphite packing is also arranged between the valve rod and the valve body, and a second sealing assembly is arranged at the position of the valve seat, and can seal between the valve seat and the opening and closing piece and simultaneously seal the valve seat and the valve body.

Preferably, the first seal is in direct contact with the valve stem, and the lip seal of the first seal opens into the fluid passage of the valve body, while the graphite packing is disposed on the side of the first seal remote from the fluid passage. Even when the part of the opening and closing piece is leaked, the fluid flows to the valve rod part through the gap, the leaked part is sealed in time due to the existence of the first sealing piece and the graphite packing arranged between the valve rod and the valve body, the opening of the lip-shaped sealing ring of the first sealing piece is downward, the leaked fluid directly impacts the opening part of the lip-shaped sealing ring, the lip of the lip-shaped sealing ring is in closer contact with the valve rod, and the sealing performance is more reliable.

Preferably, the outer side of the graphite filler is further provided with a pressing piece, the pressing piece is annular, a pressing plate is arranged on the outer side of the pressing piece, the pressing plate and the valve body are fixed through fastening screws, and a gap is formed between the pressing plate and the valve body. The graphite packing can be tightly pressed by the pressing piece along with the locking of the fastening screw.

Preferably, the upper end of compressing tightly the piece is provided with the inclined plane, inclined plane from inside to outside downward sloping, just the below of pressure strip sets up the inclined plane that suits with. The cooperation setting on two inclined planes can guarantee the in-process of fastening screw locking, and the buffering between piece and the graphite packing compresses tightly prevents the damage to the graphite packing.

Preferably, the second seal assembly comprises a lip seal assembly, the lip seal assembly is two lip seal rings mounted back-to-back, and the lip seal assembly is disposed between the valve seat and the valve body, while the openings of the two lip seal rings face the valve seat and the valve body, respectively. Two opening directions set up, can play the effect of two-way seal.

Preferably, the second sealing assembly further comprises a valve seat sealing ring, and the valve seat sealing ring is arranged at the position where the opening and closing member is contacted with the valve seat. The sealing effect between the opening and closing piece and the valve seat is ensured.

Preferably, the second seal assembly further comprises a graphite seal ring disposed between the valve seat and the valve body and not coincident with the lip seal assembly. The main function of the graphite sealing ring is fire prevention, and the arrangement with inconsistent positions can play a role in double sealing.

The utility model relates to a novel combination sealed fire prevention ball valve's beneficial effect be, adopt novel combination SEAL structure, increase LIP-SEAL sealing washer (LIP SEAL or spring energy storage sealing washer), the material such as PTFE RPTFE (polytetrafluoroethylene or polytetrafluoroethylene glass fiber) that can be used to the ultra-low temperature operating mode is adopted, effectively prevent revealing of valve rod and disk seat position, under the condition of using with graphite SEAL combination, sealing performance has been improved, and the medium (being fluid) effort that the graphite SEAL bore has been obstructed, effectively protect the graphite SEAL, the graphite loss of graphite SEAL has been avoided, the life of sealing washer has been prolonged.

Drawings

Fig. 1 is a sectional view showing the overall structure of the novel combined sealing type fire-proof ball valve.

Fig. 2 is an enlarged view of a portion of the second seal assembly of fig. 1.

Fig. 3 is a partially enlarged view of the first seal and graphite packing portions of fig. 1.

Fig. 4 is a cross-sectional view of the first seal.

In the figure:

1-a valve body; 2-valve seat; 3-a starter; 4-a valve stem; 5-a first seal; 6-graphite filler; 7-a second seal assembly; 8-a pressing piece; 9-a pressure strip;

11-a fluid channel; 31-a through hole; 71-lip seal combination; 72-valve seat seal ring; 73-graphite sealing ring; 81-inclined plane; 91-fastening screws.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1-4, the novel combined sealing type fire-proof ball valve in this embodiment comprises a valve body 1, a fluid passage 11 is disposed in the valve body 1, a valve seat 2 is disposed in the fluid passage 11, an opening/closing member 3 is disposed on the valve seat 2, the opening/closing member 3 is a ball, the opening/closing member 3 can block the fluid passage 11, a through hole 31 is disposed in the center of the opening/closing member 3, the opening/closing member 3 is further connected with a valve rod 4, the valve rod 4 penetrates through the valve body 1 and exposes out of the valve body 1, the valve rod 4 can drive the opening/closing member 3 to rotate under the action of external force, the through hole 31 of the opening/closing member 3 is communicated with the fluid passage 11, a first sealing member 5 is disposed between the valve rod 4 and the valve body 1, the first sealing member 5 is a lip-shaped sealing ring, a graphite packing 6 is disposed between the valve rod 4 and the valve body 1, a second sealing member 7 is disposed at the position of the valve seat 2, while sealing the valve seat 2 to the valve body 1.

Referring to fig. 1 and 3, 4, the first seal 5 is in direct contact with the valve stem 4, and the lip seal of the first seal 5 opens into the fluid passage 11 of the valve body 1, while the graphite packing 6 is disposed on the side of the first seal remote from the fluid passage 11. Even if the part of the opening and closing element 3 leaks, the fluid flows to the part of the valve rod 4 through the gap, the leaked part is sealed in time due to the existence of the first sealing element 5 and the graphite packing 6 arranged between the valve rod 4 and the valve body 1, the opening of the lip-shaped sealing ring of the first sealing element 5 faces downwards, the leaked fluid directly impacts the opening part of the lip-shaped sealing ring, the lip of the lip-shaped sealing ring is in closer contact with the valve rod 4, and the sealing performance is more reliable, wherein the part of the first sealing element 5 in the attached figures 1 and 3 is not shown in detail, and the specific structure is shown in the attached figure 4.

Referring to fig. 3, a pressing member 8 is further arranged on the outer side of the graphite packing 6, the pressing member 8 is annular, a pressing plate 9 is arranged on the outer side of the pressing member 8, the pressing plate 9 and the valve body 1 are fixed through a fastening screw 91, and a gap is formed between the pressing plate 9 and the valve body 1. The compression of the graphite packing 6 by the compression piece 8 along with the locking of the fastening screw 91 can be ensured.

Referring to fig. 3, the upper end of the pressing member 8 is provided with an inclined surface 81, the inclined surface 81 is inclined downward from inside to outside, and a corresponding inclined surface 81 is provided below the pressing plate 9. The cooperation setting of two inclined planes 81 can guarantee the in-process of fastening screw 91 locking, and the buffering between 8 and the graphite packing 6 of compressing tightly prevents the damage to graphite packing 6.

Referring to fig. 2, the second sealing assembly 7 includes a lip seal assembly 71, the lip seal assembly 71 is two lip seals mounted back-to-back, and the lip seal assembly 71 is disposed between the valve seat 2 and the valve body 1, with the two lip seals opening toward the valve seat 2 and the valve body 1, respectively. Two opening directions set up, can play the effect of two-way seal.

Referring to fig. 2, the second seal assembly 7 further comprises a seat seal 72, the seat seal 72 being disposed at a position where the shutter 3 contacts the valve seat 2. The sealing effect between the shutter 3 and the valve seat 2 is ensured.

Referring to fig. 2, the two-seal assembly further includes a graphite seal ring 73, the graphite seal ring 73 being disposed between the valve seat 2 and the valve body 1 and being located at a position different from the position of the lip seal assembly 71. The main function of the graphite sealing ring 73 is fire prevention, and the arrangement of inconsistent positions can play a role in double sealing.

The utility model provides a novel combination sealed fire prevention ball valve's beneficial effect is, adopt novel combination SEAL structure, increase LIP-SEAL sealing washer (LIP SEAL or spring energy storage sealing washer), the material such as PTFE RPTFE (polytetrafluoroethylene or polytetrafluoroethylene glass fiber) that can be used to the ultra-low temperature operating mode is adopted, effectively prevent revealing at

valve rod

4 and 2 positions of disk seat, under the condition of using with graphite SEAL 73 combination, sealing performance has been improved, and the medium (being fluid) effort that graphite SEAL 73 bore has been obstructed, effectively protect graphite SEAL 73, the graphite loss of graphite SEAL 73 has been avoided, the life of sealing washer has been prolonged.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a novel combination sealed fire prevention ball valve, includes valve body (1), be provided with fluid passage (11) in valve body (1), be provided with disk seat (2) in fluid passage (11), set up on disk seat (2) and open and close piece (3), open and close piece (3) for the spheroid, open and close piece (3) can block fluid passage (11), just the center of opening and close piece (3) is provided with through-hole (31), just open and close piece (3) and still be connected with valve rod (4), valve rod (4) are passed valve body (1) and are exposed valve body (1), and under the exogenic action, valve rod (4) can drive and open and close piece (3) rotatory, make through-hole (31) and fluid passage (11) intercommunication of opening and close piece (3), its characterized in that: set up first sealing member (5) between valve rod (4) and valve body (1), just first sealing member (5) are lip seal circle, and still be provided with graphite packing (6) between valve rod (4) and valve body (1) the position of disk seat (2) is provided with second seal assembly (7), second seal assembly (7) enable seal between disk seat (2) and opening and close piece (3), also make simultaneously disk seat (2) are sealed with valve body (1).

2. The novel combined sealed fire-proof ball valve according to claim 1, characterized in that: the first sealing element (5) is in direct contact with the valve rod (4), the opening of the lip-shaped sealing ring of the first sealing element (5) faces the fluid channel (11) of the valve body (1), and the graphite packing (6) is arranged on one side of the first sealing ring, which is far away from the fluid channel (11).

3. The novel combined sealed fire-proof ball valve according to claim 1, characterized in that: the graphite packing is characterized in that a pressing piece (8) is further arranged on the outer side of the graphite packing (6), the pressing piece (8) is annular, a pressing plate (9) is arranged on the outer side of the pressing piece (8), the pressing plate (9) is fixed with the valve body (1) through a fastening screw (91), and an interval is formed between the pressing plate (9) and the valve body (1).

4. A novel combined sealed fire-resistant ball valve according to claim 3, characterized in that: the upper end of the pressing piece (8) is provided with an inclined surface (81), the inclined surface (81) inclines downwards from inside to outside, and the inclined surface (81) which is matched with the pressing plate (9) is arranged below the pressing plate.

5. The novel combined sealed fire-proof ball valve according to claim 1, characterized in that: the second seal assembly (7) comprises a lip seal combination (71), the lip seal combination (71) is two lip seal rings which are arranged back to back, the lip seal combination (71) is arranged between the valve seat (2) and the valve body (1), and the openings of the lip seal rings face the valve seat (2) and the valve body (1) respectively.

6. The novel combined sealed fire-proof ball valve according to claim 1, characterized in that: the second sealing assembly (7) further comprises a valve seat sealing ring (72), and the valve seat sealing ring (72) is arranged at the position where the opening and closing piece (3) is contacted with the valve seat (2).

7. The novel combined sealed fire-proof ball valve according to claim 5, characterized in that: the second sealing assembly (7) further comprises a graphite sealing ring (73), wherein the graphite sealing ring (73) is arranged between the valve seat (2) and the valve body (1) and is inconsistent with the position of the lip-shaped sealing combination (71).