CN219366851U

CN219366851U - Wedge gate valve

Info

Publication number: CN219366851U
Application number: CN202320237779.3U
Authority: CN
Inventors: 陈张清; 张显锋; 陈向展
Original assignee: Kaizheng Valve Co ltd
Current assignee: Kaizheng Valve Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-07-18
Anticipated expiration: 2033-01-31

Abstract

The utility model discloses a wedge gate valve, which solves the problem that a rotating piece in the middle of a gate plate is unreasonable in structural design. The valve seat, the valve rod, the mounting block and the flashboard on two sides of the mounting block are included, the mounting block is fixedly connected with the valve rod, a rotating shaft penetrates through the flashboard, the flashboard is rotationally connected with the rotating shaft, and the rotating shaft is mutually perpendicular to the valve rod; the mounting block is fixedly provided with lugs which are fixedly connected with two ends of the rotating shaft. The flashboard on two sides deflects and swings around the rotating shaft under the contact extrusion of the sealing surface of the valve seat, so that the flashboard gradually covers the sealing surface from the lower half part to the upper half part, thereby reducing the abrasion of the sealing surface.

Description

Wedge gate valve

Technical Field

The utility model relates to the field of gate valves, in particular to a wedge gate valve.

Background

A gate valve is a common valve, and the opening and closing member is a gate plate, and the moving direction of the gate plate is perpendicular to the direction of fluid, so as to control the opening and closing of the fluid. Wedge gate valves are a type of gate valve that is named because its sealing surface is at an angle to the vertical centerline, i.e., the two sealing surfaces are wedge-shaped.

The prior art discloses Chinese utility model patent: wedge type double-flashboard gate valve, publication number: CN215568050U, it is provided with horizontal top center between two flashboards, and the top center in this structure has realized horizontal floating setting under the effect of regulation pole, has reduced the wearing and tearing to the sealed face on the one hand to automatic distance between two flashboards that enlarges after sealed face wearing and tearing makes flashboard and disk seat remain effective sealed all the time. However, a gate valve with movable gate plates like this is usually swung around a spherical rotary member located at a central position, such as the above-mentioned top center rotary member, but the two gate plates have too high mobility, too large degrees of freedom, and the rotary member is usually small in size and not high in structural strength, and is liable to wear, but causes poor sealing performance when the valve is closed after long-term use, and there are some problems in structural design, which causes a short service life.

Disclosure of Invention

The purpose of the utility model is that: in order to overcome the defects of the prior art, the utility model provides a wedge gate valve, which solves the problem that a rotating piece in the middle of a gate plate is unreasonable in structural design.

The technical scheme of the utility model is as follows: the valve seat, the valve rod, the mounting block and the flashboard on two sides of the mounting block are included, the mounting block is fixedly connected with the valve rod, a rotating shaft penetrates through the flashboard, the flashboard is rotationally connected with the rotating shaft, and the rotating shaft is mutually perpendicular to the valve rod; the mounting block is fixedly provided with lugs which are fixedly connected with two ends of the rotating shaft.

By adopting the technical scheme, the flashboard on two sides deflects and swings around the rotating shaft under the contact extrusion of the sealing surface of the valve seat, so that the flashboard gradually covers the sealing surface from the lower half part to the upper half part, thereby reducing the abrasion of the sealing surface.

The utility model is further provided with: the concave cavities are formed in the two sides of the mounting block, the flashboard is located in the concave cavities, gaps are formed between the bottoms of the concave cavities and the flashboard when the valve is closed, and the flashboard is abutted with the bottoms of the concave cavities in the opening and closing process of the valve.

By adopting the further arrangement, the flashboard can only move in a limited range of the gap, and the damage caused by overlarge movement amplitude of the flashboard due to medium impact is avoided.

Still further, the present utility model provides: a supporting cambered surface is formed on the outer circular side wall of the flashboard, the circle center of the supporting cambered surface is positioned on the axis of the rotating shaft, and the side wall of the concave cavity far away from the valve rod is attached to the supporting cambered surface and is in sliding fit with the supporting cambered surface.

By adopting the further arrangement, the side wall of the concave cavity can support the weight of the flashboard, the pressure of the lug is reduced, and the flashboard can still keep certain free swing through the supporting cambered surface.

Still further, the present utility model is provided with: the lugs are also provided with a plurality of bolts which are in threaded connection with the mounting blocks.

By adopting the further arrangement, the structural strength of the lug is enhanced, and the structure is more reliable.

Drawings

FIG. 1 is a partial cross-sectional view of an embodiment of the present utility model;

FIG. 2 is an enlarged view of FIG. 1 in accordance with the present utility model;

wherein, 1, valve base; 2. a valve stem; 3. a mounting block; 4. a flashboard; 5. a rotating shaft; 6. a lug; 31. a cavity; 32. a gap; 41. a supporting cambered surface; 61. and (5) a bolt.

Description of the embodiments

The wedge gate valve as shown in fig. 1 and 2 comprises a valve seat 1, a valve rod 2, a mounting block 3 and flashboards 4 on two sides of the mounting block 3, wherein the mounting block 3 is fixedly connected with the bottom of the valve rod 2, a transverse rotating shaft 5 penetrates through the flashboard 4, the flashboard 4 is rotationally connected with the rotating shaft 5, and the rotating shaft 5 is mutually perpendicular to the valve rod 2. The mounting block 3 is fixedly provided with lugs 6, and the lugs 6 are fixedly connected with two ends of the rotating shaft 5. According to the position division of the rotation shaft 5, the shutter 4 can be divided into an upper half part and a lower half part, and in the process of closing the valve, the shutter 4 of the lower half part gradually covers the sealing surface of the valve seat 1 under the contact of the valve seat 1, and as the shutter 4 swings around the rotation shaft 5, the shutter 4 of the upper half part gradually swings to be close to the valve seat 1 and form a seal. The friction force between the flashboard 4 and the valve seat 1 is small before the valve body is completely closed and at the initial opening stage, so that the flashboard 4 is convenient to open and close, the abrasion to the sealing surface is reduced, the required external moment is reduced, and the service life is prolonged.

In order to limit the movement amplitude of the gate plate 4, concave cavities 31 are formed on two sides of the mounting block 3, the gate plate 4 is located in the concave cavities 31, after the valve is closed, gaps 32 are formed between the bottoms of the concave cavities 31 and the gate plate 4, and in the opening and closing process of the valve, the gate plate 4 can be abutted against the bottoms of the concave cavities 31 due to swinging.

The weight of flashboard 4 relies on lug 6 to support basically, in some heavy-calibre valves, overweight flashboard 4 can bend lug 6, in order to alleviate the pressure of lug 6, forms on the outer circular sidewall of flashboard 4 and supports cambered surface 41, and the circular arc centre of a circle of supporting cambered surface 41 is located the axis of rotation 5, and the laminating mutually with supporting cambered surface 41 on the cavity 31 lateral wall of keeping away from valve rod 2 for flashboard 4 can be on cavity 31 lateral wall relative slip through supporting cambered surface 41, and, installation piece 3 forms certain holding power to flashboard 4.

Three bolts 61 are further arranged on the lugs 6, and the bolts 61 are in threaded connection with the mounting blocks 3, so that the lugs 6 are firm and reliable.

Claims

1. The utility model provides a wedge gate valve, includes disk seat and valve rod, its characterized in that: the valve rod is fixedly connected with the mounting block, a rotating shaft penetrates through the valve plate, the valve plate is connected with the rotating shaft in a rotating mode, and the rotating shaft is perpendicular to the valve rod; and the mounting block is fixedly provided with lugs, and the lugs are fixedly connected with two ends of the rotating shaft.

2. The wedge gate valve of claim 1, wherein: the two sides of the mounting block are provided with concave cavities, the flashboard is positioned in the concave cavities, a gap is formed between the bottom of each concave cavity and the flashboard when the valve is closed, and the flashboard is abutted with the bottom of each concave cavity in the opening and closing process of the valve.

3. The wedge gate valve of claim 2, wherein: the outer circular side wall of the flashboard is provided with a supporting cambered surface, the circle center of the arc of the supporting cambered surface is positioned on the axis of the rotating shaft, and the side wall of the concave cavity far away from the valve rod is attached to the supporting cambered surface and is in sliding fit with the supporting cambered surface.

4. Wedge gate valve according to claim 1 or 2, characterized in that: the lug is also provided with a plurality of bolts, and the bolts are in threaded connection with the mounting blocks.