CN219975422U - Low torsion spring reset type parallel flashboard structure - Google Patents

Abstract

The utility model discloses a low-torsion spring reset type parallel flashboard structure which comprises a valve body, a valve rod, a wedge-shaped block coaxially fixed with the valve rod, a pair of hard sealing valve seats welded and fixed in the valve body, and two circular flashboards respectively arranged between the two hard sealing valve seats and the wedge-shaped block, wherein a spring contraction device is arranged between the two circular flashboards, a flashboard positioning block is fixed at the bottom of the circular flashboard, and a valve spherical positioning block matched with the flashboard positioning block is fixed below the flashboard positioning block by the valve body. According to the utility model, the hard sealing valve seat fixed on the valve body is welded, so that leakage points are eliminated, the two circular flashboards are tightly attached to each other by the spring contraction device when the valve is closed, friction is not generated between the circular flashboard and the hard sealing valve seat, and when the valve is opened, the two circular flashboard are attached to each other and are directly separated from the hard sealing valve seat, so that compared with the traditional parallel gate valve, vibration during valve seat opening is reduced, opening torque is reduced, and opening and closing are smooth.

Description

Low torsion spring reset type parallel flashboard structure

Technical Field

The utility model relates to a low torsion spring reset type parallel flashboard structure.

Background

The parallel double-gate valve is suitable for industries such as chemical industry, petroleum, natural gas, power plant, coal mine, building, steel, light industry, sewage treatment and the like, and can play an excellent role as an opening and closing device in a pipeline system because hard particles, fibrous dirt and other objects are often contained in a medium.

Conventional parallel double gate valves suffer from the following disadvantages: 1. the valve seat is a floating valve seat and is provided with a leakage point; 2. the conventional combined flashboard is of a loose combined structure, and when the valve is opened and closed, the flashboard and a sealing surface of a valve seat are easy to collide or slide and rub, so that the sealing effect and the operation torque are influenced; 3. the medium in the pipeline, especially some tiny particles, are easy to adhere to the surfaces of the wedge blocks and the inclined planes of the two flashboard, and besides the corrosion can influence the switching torque, the wedge blocks and the inclined planes of the flashboard are also easy to be blocked.

Disclosure of Invention

Aiming at the problems, the utility model provides a low torsion spring reset type parallel flashboard structure, which effectively solves the problems pointed out in the background technology.

The technical scheme adopted by the utility model is as follows:

the utility model provides a low torsion spring reset type parallel flashboard structure, includes valve body, valve rod, the wedge of coaxial fixed with the valve rod, welded fastening in the valve body a pair of hard seal disk seat to and set up respectively two circular flashboard between two hard seal disk seat and wedge, two circular flashboard between be equipped with the spring constriction device, the bottom of circular flashboard is fixed with the flashboard locating piece, the valve body is fixed with the spherical locating piece of valve with flashboard locating piece assorted below of flashboard locating piece.

Preferably, the spring contraction device comprises fan-shaped baffle sleeves respectively fixed on the inner sides of the two circular flashboards, and a spring guide sleeve arranged between the two fan-shaped baffle sleeves, wherein springs are arranged in the spring guide sleeve in a matching manner.

Preferably, a valve plate limiting block matched with the bottom of the valve rod is fixed on the inner side of the circular flashboard.

When the valve plate limiting block is used for the circular flashboard switch, the circular flashboard is prevented from rotating.

Preferably, the fan-shaped baffle sleeve is fixed on the circular flashboard through bolts or welding.

According to the utility model, the hard sealing valve seat fixed on the valve body is welded, so that leakage points are eliminated, the two circular flashboards are tightly attached to each other by the spring contraction device when the valve is closed, friction is not generated between the circular flashboard and the hard sealing valve seat, and when the valve is opened, the two circular flashboard are attached to each other and are directly separated from the hard sealing valve seat, so that compared with the traditional parallel gate valve, vibration during valve seat opening is reduced, opening torque is reduced, and opening and closing are smooth.

The utility model omits a conventional guiding device, is convenient for processing procedures, saves materials, and reduces the friction area between the flashboard positioning block and the valve spherical positioning block.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

fig. 2 is a side view structural diagram of fig. 1.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Furthermore, in the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The utility model will now be described in further detail with reference to the accompanying drawings by means of specific examples.

As shown in fig. 1-2, a low torsion spring reset type parallel flashboard structure comprises a valve body 1, a valve rod 2, a wedge block 3 coaxially fixed with the valve rod 2, a pair of hard sealing valve seats 4 welded and fixed in the valve body 1, and two circular flashboard 5 respectively arranged between the two hard sealing valve seats 4 and the wedge block 3, wherein a spring contraction device is arranged between the two circular flashboard 5, a flashboard positioning block 6 is fixed at the bottom of the circular flashboard 5, and a valve spherical positioning block 7 matched with the flashboard positioning block 6 is fixed below the flashboard positioning block 6 in the valve body 1.

The spring contraction device comprises fan-shaped baffle sleeves 8 which are respectively fixed on the inner sides of the two circular flashboards 5, and a spring guide sleeve 9 which is arranged between the two fan-shaped baffle sleeves 8, wherein springs 10 are arranged in the spring guide sleeve 9 in a matching manner.

The inner side of the circular flashboard 5 is fixed with a valve plate limiting block 11 matched with the bottom of the valve rod 2.

The fan-shaped baffle sleeve 8 is fixed on the circular flashboard 5 through bolts or welding.

The working principle of the utility model is as follows:

when the valve is closed: the valve rod 2 and the wedge block 3 drive the two circular flashboard 5 to move downwards simultaneously, when the flashboard locating piece 6 on the circular flashboard 5 is contacted with the valve spherical locating piece 7, the flashboard locating piece 6 moves downwards obliquely along the spherical surface of the valve spherical locating piece 7, at the moment, the spring 10 is stretched until the circular flashboard 5 is attached to the hard sealing valve seat 4, thus closing of the valve is completed, sliding friction is not generated between the circular flashboard 5 and the hard sealing valve seat 4 in the process, and in this state, the two circular flashboard 5 is tightly attached to the hard sealing valve seats 4 on two sides under the action of the wedge block 3.

When the valve is opened: the valve rod 2 and the wedge block 3 drive the two circular flashboard 5 to move upwards simultaneously, the flashboard positioning block 6 moves upwards obliquely along the spherical surface of the valve spherical positioning block 7, at the moment, the spring 10 enables the two circular flashboard 5 to be close to each other under the action of the contraction force until the flashboard positioning block 6 leaves the valve spherical positioning block 7, the valve rod 2 and the wedge block 3 continue to move upwards, the circular flashboard 5 moves upwards along with the upward movement until the valve is completely opened, thus the opening of the valve is completed, sliding friction is not generated between the circular flashboard 5 and the hard sealing valve seat 4 in the process, and in the state, the two circular flashboard 5 are separated from the hard sealing valve seats 4 at two sides under the action of the contraction force of the spring 10.

Finally, it should be noted that the above list is only specific embodiments of the present utility model. Obviously, the utility model is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.

Claims (4)

1. The utility model provides a parallel flashboard structure of low torsion spring reset type, its characterized in that includes valve body (1), valve rod (2), with valve rod (2) coaxial fixed wedge (3), welded fastening in valve body (1) a pair of hard seal disk seat (4), and set up respectively two circular flashboard (5) between two hard seal disk seat (4) and wedge (3), two circular flashboard (5) between be equipped with spring constriction device, the bottom of circular flashboard (5) is fixed with flashboard locating piece (6), valve body (1) be fixed with in the below of flashboard locating piece (6) with flashboard locating piece (6) assorted valve ball locating piece (7).

2. The low torsion spring return type parallel flashboard structure according to claim 1, wherein the spring contraction device comprises fan-shaped baffle sleeves (8) which are respectively fixed on the inner sides of the two circular flashboard (5), and spring guide sleeves (9) which are arranged between the two fan-shaped baffle sleeves (8), and springs (10) are arranged in the spring guide sleeves (9) in a matching way.

3. The low torsion spring return type parallel gate structure according to claim 1, wherein a valve plate limiting block (11) matched with the bottom of the valve rod (2) is fixed on the inner side of the circular gate (5).

4. A low torsion spring return type parallel shutter structure according to claim 2, wherein the fan-shaped shutter cover (8) is fixed to the circular shutter (5) by screws or welding.