CN217153040U

CN217153040U - High-performance flat gate valve with double-acting valve seat sealing structure

Info

Publication number: CN217153040U
Application number: CN202220369265.9U
Authority: CN
Inventors: 周卫华; 张明霞; 朱雪雪; 颜明川
Original assignee: Chongqing Kete Industrial Valve Co ltd
Current assignee: Chongqing Kete Industrial Valve Co ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-08-09
Anticipated expiration: 2032-02-23

Abstract

The utility model discloses a high performance plate valve with two effect disk seat seal structure belongs to plate valve technical field, which comprises a valve body, be provided with the flashboard in the valve body, the both sides of flashboard all are provided with combined type disk seat seal structure, and combined type disk seat seal structure includes main valve seat and vice disk seat, the excircle of vice disk seat is provided with big chamfer, and fills up between the outer end of pretension spring and the valve body and have the pretension spring, and when main valve seat leakproofness disappearance, vice disk seat continues to seal because the effect automatic loading of pretension spring pretension, does not need to annotate supplementary sealed fat like ordinary single gate plate gate valve adoption in order to satisfy emergent maintenance needs, and the maintenance work load and the use cost that significantly reduce maintain.

Description

High-performance flat gate valve with double-acting valve seat sealing structure

Technical Field

The utility model relates to a plate valve technical field specifically is a high performance plate valve with two effect disk seat seal structures.

Background

The flat gate valve is used on conveying pipelines, emptying systems and oil and gas storage devices of natural gas, petroleum, chemical industry, hydropower and the like, and is used as opening and closing equipment.

The structure of a common flat gate valve on the market at present is generally that a left valve seat and a right valve seat are matched with a single gate plate, the gate plate is easily scaled due to the influence of media and pressure in the using process, and a soft sealing valve seat is abraded to cause failure, so that the high-performance flat gate valve with the double-acting valve seat sealing structure is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high performance plate valve with two effect disk seat seal structure, it can realize keeping the reliability sealed between disk seat and the flashboard.

In order to solve the above problem, the utility model adopts the following technical scheme:

the utility model provides a high performance plate valve with two effect disk seat seal structure, includes the valve body, be provided with the flashboard in the valve body, the both sides of flashboard all are provided with combined type disk seat seal structure, and combined type disk seat seal structure includes main valve seat and vice disk seat.

As an optimized scheme of the utility model, the excircle of vice disk seat is provided with big chamfer, and has filled up the pretension spring between the outer end of pretension spring and the valve body.

As a preferred scheme of the utility model, the outer pot head of main valve seat is equipped with the tip sealing washer, the draw-in groove of seting up on tip sealing washer and the valve body offsets.

As an optimized scheme of the utility model, one side of main valve seat towards the flashboard is provided with the main seal circle, main seal circle offsets with the flashboard side.

As an optimized scheme of the utility model, the one side of vice disk seat orientation flashboard is provided with vice sealing washer, vice sealing washer offsets with the flashboard side.

As an optimized scheme of the utility model, main valve seat outer end middle part is provided with the side sealing washer.

As a preferred scheme of the utility model, main valve seat outer wall corresponds vice disk seat inner circle and is provided with the bulge loop, and bulge loop outside joint has disk seat clearance sealing washer.

As an optimized scheme of the utility model, pretension spring is belleville spring.

As an optimized proposal of the utility model, the auxiliary sealing ring and the main sealing ring are made of polytetrafluoroethylene.

As a preferred scheme of the utility model, the upper end fixedly connected with lead screw of flashboard, and the upper end of lead screw is provided with screw thread elevating system.

Compared with the prior art, the utility model has the advantages of:

(1) this scheme is through setting up the disk seat, and when main valve seat leakproofness disappearance, the disk seat continues to seal because the effect automatic loading of pretension spring pretension, need not adopt like ordinary single flashboard plate valve to annotate supplementary sealed fat in order to satisfy emergent maintenance needs, and the maintenance work volume and use cost that significantly reduce.

(2) According to the scheme, the pre-tightening spring is arranged, the disc spring is used for replacing a cylindrical spring on a valve seat of a traditional flat gate valve, the load of the whole sealing surface is uniform, the problems that the traditional cylindrical spring is not uniformly loaded and neglected to be loaded are solved, the auxiliary valve seat adopts a pre-tightening mode of the pre-tightening spring, the sealing performance is better, and tight shutoff and zero leakage can be guaranteed under extremely low pressure difference (the pressure difference is infinitely close to zero).

Drawings

Fig. 1 is a perspective view of the composite valve seat sealing structure of the present invention.

Fig. 2 is a partial cross-sectional view of the composite valve seat sealing structure of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2 according to the present invention.

Fig. 4 is a perspective view of the middle pretension spring of the present invention.

The reference numbers in the figures illustrate:

1. a valve body; 2. a main valve seat; 3. a secondary valve seat; 4. pre-tightening the spring; 5. a shutter plate; 6. a secondary seal ring; 7. a primary seal ring; 8. a side sealing ring; 9. a valve seat gap seal ring; 10. and an end sealing ring.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-4, a high performance flat gate valve with a double-acting valve seat sealing structure includes a valve body 1, a gate plate 5 is disposed in the valve body 1, a composite valve seat sealing structure is disposed on both sides of the gate plate 5, and the composite valve seat sealing structure includes a main valve seat 2 and an auxiliary valve seat 3.

Specifically, the excircle of the auxiliary valve seat 3 is provided with a large chamfer, and a pre-tightening spring 4 is padded between the outer end of the pre-tightening spring 4 and the valve body 1.

In this embodiment, through the pre-tightening spring 4, the pre-tightening spring 4 applies pressure to the auxiliary valve seat 3 to the pre-tightening force of the center, so that the normal operation of the auxiliary valve seat 3 after the main valve seat 2 fails is ensured.

Specifically, the outer end of the main valve seat 2 is sleeved with an end sealing ring 10, and the end sealing ring 10 abuts against a clamping groove formed in the valve body 1.

In this embodiment, the end seal 10 is provided to seal between the end of the main valve seat 2 and the valve body 1.

Specifically, a main sealing ring 7 is arranged on one side of the main valve seat 2 facing the gate plate 5, and the main sealing ring 7 abuts against the side face of the gate plate 5.

In this embodiment, the main seal ring 7 is provided to improve the sealing effect when the main valve seat 2 contacts the shutter 5.

Specifically, a secondary sealing ring 6 is arranged on one side of the secondary valve seat 3 facing the gate plate 5, and the secondary sealing ring 6 abuts against the side face of the gate plate 5.

In this embodiment, by providing the sub seal ring 6, the sealing effect when the sub valve seat 3 contacts the shutter 5 is improved.

Specifically, the middle part of the outer end of the main valve seat 2 is provided with a side sealing ring 8.

In this embodiment, through the side sealing washer 8 that sets up, guarantee the leakproofness of main valve seat 2 and the contact department of valve body 1.

Specifically, the outer wall of the main valve seat 2 is provided with a convex ring corresponding to the inner ring of the auxiliary valve seat 3, and the outer side of the convex ring is clamped with a valve seat gap sealing ring 9.

In this embodiment, the sealing performance of the contact surface between the main valve seat 2 and the auxiliary valve seat 3 is improved by the valve seat gap sealing ring 9.

Specifically, the pre-tightening spring 4 is a belleville spring.

In the embodiment, the pre-tightening spring 4 is arranged, the disc spring is used for replacing a cylindrical spring on a valve seat of a traditional flat gate valve, the load of the whole sealing surface is uniform, the problems of uneven loading and neglected loading of the traditional cylindrical spring are solved, the auxiliary valve seat 3 adopts a pre-tightening mode of the pre-tightening spring 4, the sealing performance is better, and tight shutoff and zero leakage can be guaranteed under extremely low pressure difference (the pressure difference is infinitely close to zero).

Specifically, the secondary seal ring 6 and the primary seal ring 7 are made of polytetrafluoroethylene materials

In this embodiment, the wearing and tearing between vice sealing washer 6 and main sealing washer 7 and flashboard 5 can effectively be avoided to the polytetrafluoroethylene material of vice sealing washer 6 and main sealing washer 7 to strike off flashboard 5 surface scale deposit.

Specifically, the upper end of the flashboard 5 is fixedly connected with a screw rod, and the upper end of the screw rod is provided with a thread lifting mechanism.

In this embodiment, the screw thread elevating system through setting up drives the lead screw and goes up and down to drive flashboard 5 and go up and down, and then the break-make of the cooperation control gate valve through flashboard 5 and both sides combined type disk seat seal structure, the use of the gate valve of being convenient for.

The working principle is as follows: when the gate valve is assembled, the auxiliary valve seat 3 is sleeved on the main valve seat 2 and then inserted into the clamping grooves on two sides of the valve body 1 corresponding to the flashboards 5, due to the extrusion effect of the end sealing rings 10, the distance between the two main valve seats 2 is smaller than the thickness of the flashboards 5, the main valve seats 2 on two sides are tightly attached to the flange section of the valve body 1 by using equipment, then the flashboards 5 are forcibly pressed between the two main valve seats 2, due to the effect of the pre-tightening springs 4, the auxiliary valve seat 3 is squeezed open towards two sides, then the assembly of the valve body is sequentially completed downwards through the gaps between the main valve seats 2, when the sealing performance of the main valve seats 2 is lost, the auxiliary valve seat 3 is automatically loaded due to the pre-tightening effect of the pre-tightening springs 4 and continuously sealed, the auxiliary sealing grease does not need to be injected to meet the emergency maintenance requirement like a common single-flashboard flat gate valve, and the maintenance workload and the use cost are greatly reduced.

The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the improvement concept of the present invention within the technical scope disclosed in the present invention.

Claims

1. A high performance plate valve with double-acting valve seat sealing structure, includes valve body (1), its characterized in that: be provided with flashboard (5) in valve body (1), the both sides of flashboard (5) all are provided with combined type disk seat seal structure, and combined type disk seat seal structure includes main valve seat (2) and auxiliary valve seat (3).

2. A high performance plate gate valve having a double acting valve seat seal structure as claimed in claim 1, wherein: the outer circle of the auxiliary valve seat (3) is provided with a large chamfer, and a pre-tightening spring (4) is padded between the outer end of the pre-tightening spring (4) and the valve body (1).

3. A high performance plate gate valve having a double acting valve seat seal structure as claimed in claim 1, wherein: the outer end of the main valve seat (2) is sleeved with an end sealing ring (10), and the end sealing ring (10) is abutted to a clamping groove formed in the valve body (1).

4. A high performance plate gate valve having a double acting valve seat seal structure as claimed in claim 1, wherein: one side of the main valve seat (2) facing the flashboard (5) is provided with a main sealing ring (7), and the main sealing ring (7) is abutted to the side face of the flashboard (5).

5. A high performance flat gate valve having a double acting valve seat seal arrangement as claimed in claim 1, wherein: one side of the auxiliary valve seat (3) facing the flashboard (5) is provided with an auxiliary sealing ring (6), and the auxiliary sealing ring (6) is abutted to the side face of the flashboard (5).

6. A high performance plate gate valve having a double acting valve seat seal structure as claimed in claim 1, wherein: and a side sealing ring (8) is arranged in the middle of the outer end of the main valve seat (2).

7. A high performance plate gate valve having a double acting valve seat seal structure as claimed in claim 1, wherein: the outer wall of the main valve seat (2) is provided with a convex ring corresponding to the inner ring of the auxiliary valve seat (3), and the outer side of the convex ring is clamped with a valve seat gap sealing ring (9).

8. A high performance plate gate valve having a double acting valve seat seal structure as claimed in claim 2, wherein: the pre-tightening spring (4) is a butterfly spring.

9. A high performance plate gate valve having a double acting valve seat seal structure according to claim 5, wherein: and the auxiliary sealing ring (6) and the main sealing ring (7) are made of polytetrafluoroethylene materials.

10. A high performance plate gate valve having a double acting valve seat seal structure as claimed in claim 1, wherein: the upper end fixedly connected with lead screw of flashboard (5), and the upper end of lead screw is provided with screw thread elevating system.