CN212080197U

CN212080197U - Pressure equalizing structure of three-eccentric center butterfly valve

Info

Publication number: CN212080197U
Application number: CN202020759056.6U
Authority: CN
Inventors: 王帅; 卞红飞
Original assignee: Wuxi Boniu Control Valve Co ltd
Current assignee: Wuxi Boniu Control Valve Co ltd
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2020-12-04
Anticipated expiration: 2030-05-09

Abstract

The utility model relates to a three eccentric butterfly valve voltage-sharing structures, including the valve body, rotate in the valve body and set up the valve plate, the valve plate includes big valve plate and little valve plate, and big valve plate sets up in little valve plate periphery, installs the baffle on the big valve plate, installs the valve rod in the little valve plate, installs the clamping ring on the big valve plate, sets up the sealing washer between big valve plate and the clamping ring, sets up the bottom sealing washer between sealing washer and the big valve plate. The utility model discloses, simple structure makes the medium pressure at valve plate both ends become the voltage-sharing state, reaches the purpose that reduces the moment of torsion, realizes driving big valve with less actuating mechanism.

Description

Pressure equalizing structure of three-eccentric center butterfly valve

Technical Field

The utility model belongs to the technical field of the valve, a three eccentric butterfly valve voltage-sharing structure is related to.

Background

The butterfly valve has good flow regulation function and closing sealing characteristic, and is one of the fastest valve varieties developed in the last ten years. The butterfly valve has a wide application range. The variety and number of uses thereof are still continuously expanding and are developing toward high temperature, high pressure, large caliber, high sealing property, long life, excellent regulation property, and one-valve multi-function. The reliability and other performance indexes of the composite material reach higher levels. The existing three-eccentric butterfly valve generally adopts the connection between a valve rod and a valve plate through a key and a pin. When the actuating mechanism drives the valve rod to rotate, the valve plate connected with the valve rod is opened or closed along with the valve rod. When the medium in the pipeline flows through, the valve plate is required to overcome the pressure of the medium when closed, so that the related torque of the actuating mechanism is required to be correspondingly increased, and the torque is often selected to be larger when the type of the actuating mechanism is selected.

Disclosure of Invention

An object of the utility model is to provide a three eccentric butterfly valve voltage-sharing structure can solve foretell problem, when opening the valve plate in the pipeline, makes the medium pressure at valve plate both ends become the voltage-sharing state, reaches the purpose that reduces the moment of torsion, realization drove big valve with less actuating mechanism.

According to the utility model provides a technical scheme: the pressure equalizing structure of the three-eccentric butterfly valve comprises a valve body, wherein a valve plate is rotatably arranged in the valve body and comprises a large valve plate and a small valve plate, the large valve plate is arranged at the periphery of the small valve plate, a baffle is arranged on the large valve plate, a valve rod is arranged in the small valve plate, a pressing ring is arranged on the large valve plate, a sealing ring is arranged between the large valve plate and the pressing ring, and a bottom sealing ring is arranged between the sealing ring and the large valve plate.

As a further improvement, the valve rod connecting hole is arranged in the small valve plate, the two sides of the lower part of the small valve plate are sealing surfaces of the small valve plate, the upper side of the sealing surface of the small valve plate is a baffle contact surface, and the valve rod is arranged in the valve rod connecting hole.

As a further improvement, the small valve plate is connected with the valve rod through a key groove structure and a pin shaft structure.

As the utility model discloses a further improvement, big valve plate one end periphery is opened there is sealed annular, big valve plate end face processing clamping ring connecting hole and clamping ring location boss, it has the sealed annular of backward flow to open sealing ring tank bottom portion, it has big valve plate hole to open at big valve plate middle part, big valve plate hole inner wall is big valve plate sealing face.

As a further improvement, the baffle is arranged at the upper end of the big valve plate hole, and the lower part of the small valve plate is arranged in the big valve plate hole.

As a further improvement of the utility model, a valve plate connecting hole is penetrated in the pressing ring, and a valve plate positioning groove is formed in one end of the pressing ring.

The utility model discloses an actively advance the effect and lie in:

the utility model has simple structure and small occupied space; when the valve plate is opened in the pipeline, the medium pressure at the two ends of the valve plate is in a pressure equalizing state, so that the purposes of reducing the torque and driving the large valve by a smaller actuating mechanism are achieved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side cross-sectional view of fig. 1.

Fig. 3 is a schematic view of the present invention in operation.

Fig. 4 is the structural schematic diagram of the small valve plate of the present invention.

Fig. 5 is a schematic structural view of the large valve plate of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

In the drawings 1-5, the valve comprises a large valve plate 1, a sealing ring groove 1-1, a pressing ring connecting hole 1-2, a pressing ring positioning boss 1-3, a backflow sealing ring groove 1-4, a large valve plate hole 1-5, a large valve plate sealing surface 1-6, a small valve plate 2, a valve rod connecting hole 2-1, a small valve plate sealing surface 2-2, a baffle plate contact surface 2-3, a baffle plate 3, a valve rod 4, a valve body 5, a sealing ring 6, a pressing ring 7 and the like.

As shown in fig. 1-2, the utility model relates to a three eccentric butterfly valve voltage-sharing structure, including valve body 5, rotate in the valve body 5 and set up the valve plate, the valve plate includes big valve plate 1 and little valve plate 2, and big valve plate 1 sets up in 2 peripheries of little valve plate, and installation baffle 3 on the big valve plate 1 installs valve rod 4 in the little valve plate 2, installs clamping ring 7 on the big valve plate 1, sets up sealing washer 6 between big valve plate 1 and the clamping ring 7, sets up the bottom sealing washer between sealing washer 6 and the big valve plate 1.

As shown in figure 4, a valve rod connecting hole 2-1 is formed in the small valve plate 2, a key groove is formed in one side of the valve rod connecting hole 2-1, two sides of the lower portion of the small valve plate 2 are respectively provided with a small valve plate sealing surface 2-2, and the upper side of the small valve plate sealing surface 2-2 is provided with a baffle plate contact surface 2-3. The valve rod 4 is positioned in the valve rod connecting hole 2-1 and is connected with the small valve plate 2 through a key groove structure and a pin shaft structure, the key groove structure realizes radial fixation of the valve rod and the small valve plate, and the pin shaft realizes axial fixation of the valve rod and the small valve plate.

As shown in figure 5, the periphery of one end of the large valve plate 1 is provided with a sealing ring groove 1-1 for installing a sealing ring 6, and the large valve plate 1 is provided with a clamping ring connecting hole 1-2 and a clamping ring positioning boss 1-3 on the same end surface for positioning and connecting with a clamping ring 7 through a bolt. The bottom of the sealing ring groove 1-1 is provided with a backflow sealing ring groove 1-4 for installing a bottom sealing ring. The middle part of the large valve plate 1 is provided with large valve plate holes 1-5, and the inner walls of the large valve plate holes 1-5 are large valve plate sealing surfaces 1-6. The upper ends of the large valve plate holes 1-5 are provided with baffle plates 3. The lower part of the small valve plate 2 is positioned in the large valve plate holes 1-5.

A valve plate connecting hole penetrates through the pressing ring 7 and is used for being connected with the valve plate 2 through a bolt, a valve plate positioning groove is formed in one end of the pressing ring 7 and is matched with the pressing ring positioning boss 1-3.

When the large valve plate 1, the sealing ring 6, the pressing ring 7 and the bottom sealing ring are installed, the bottom sealing ring is embedded into the backflow sealing ring groove 1-4, the sealing ring 6 is clamped into the sealing ring groove 1-1, the valve plate positioning groove is embedded into the pressing ring positioning boss 1-3, the positioning of the valve plate 2 and the pressing ring 7 is completed, the locking bolt is sequentially screwed into the valve plate connecting hole and the pressing ring connecting hole 1-2, the connection of the large valve plate 1 and the pressing ring 7 is completed, the sealing ring 6 and the bottom sealing ring are extruded, and the sealing between the large valve plate 1 and the pressing ring 7 is completed.

The working process of the utility model is as follows:

as shown in fig. 3, when the valve is opened, the valve rod 4 drives the small valve plate 2 to rotate counterclockwise by a certain angle, so that the small valve plate sealing surface 2-2 is separated from the large valve plate sealing surface 1-6, part of the medium firstly passes through the large valve plate hole 1-5, the valve rod 4 continues to drive the small valve plate 2 to rotate counterclockwise, the passing medium is gradually increased until the baffle plate contact surface 2-3 is contacted with the baffle plate 3, the small valve plate 2 drives the large valve plate 1 to rotate, and finally the valve completes the opening action. Since part of the medium has previously flowed out through the large valve plate holes 1-5, the resistance against the medium is reduced when the large valve plate 1 needs to be opened.

Claims

1. The utility model provides a three eccentric butterfly valve pressure-equalizing structure which characterized in that: the structure includes valve body (5), rotate in valve body (5) and set up the valve plate, the valve plate includes big valve plate (1) and little valve plate (2), big valve plate (1) sets up little valve plate (2) periphery, install baffle (3) on big valve plate (1), install valve rod (4) in little valve plate (2), install clamping ring (7) on big valve plate (1), big valve plate (1) with set up sealing washer (6) between clamping ring (7), sealing washer (6) with set up the bottom sealing washer between big valve plate (1).

2. The pressure equalizing structure of a triple eccentric butterfly valve according to claim 1, wherein: a valve rod connecting hole (2-1) is formed in the small valve plate (2), small valve plate sealing surfaces (2-2) are arranged on two sides of the lower portion of the small valve plate (2), a baffle plate contact surface (2-3) is arranged on the upper side of each small valve plate sealing surface (2-2), and the valve rod (4) is located in the valve rod connecting hole (2-1).

3. The pressure equalizing structure of a triple eccentric butterfly valve according to claim 1, wherein: the small valve plate (2) is connected with the valve rod (4) through a key groove structure and a pin shaft structure.

4. The pressure equalizing structure of a triple eccentric butterfly valve according to claim 1, wherein: the large valve plate is characterized in that a sealing ring groove (1-1) is formed in the periphery of one end of the large valve plate (1), a pressing ring connecting hole (1-2) and a pressing ring positioning boss (1-3) are machined in the end face of the large valve plate (1), a backflow sealing ring groove (1-4) is formed in the bottom of the sealing ring groove (1-1), a large valve plate hole (1-5) is formed in the middle of the large valve plate (1), and the inner wall of the large valve plate hole (1-5) is a large valve plate sealing face (1-6).

5. The pressure equalizing structure of a triple eccentric butterfly valve according to claim 4, wherein: the baffle (3) is installed at the upper end of the large valve plate hole (1-5), and the lower part of the small valve plate (2) is located in the large valve plate hole (1-5).

6. The pressure equalizing structure of a triple eccentric butterfly valve according to claim 4, wherein: the valve plate connecting hole penetrates through the pressing ring (7), and a valve plate positioning groove is formed in one end of the pressing ring (7).