Soft sealing structure of sealing butterfly valve with good sealing performance

Abstract

The soft sealing structure of the sealing butterfly valve is good in sealing performance and comprises a valve body, a valve plate is arranged in the valve body, a valve rod is installed on the top of the valve plate, and first expansion sealing air bags are arranged on the front face and the back face of the valve plate respectively. The outer walls of the two first expansion sealing air bags are in interference fit with the inner wall of the valve body. The utility model relates to the technical field of butterfly valves, in particular to a sealing butterfly valve soft sealing structure with good sealing performance, which can greatly improve the sealing performance of a butterfly valve through the matching of a valve body, a valve plate, a sealing ring, a first expansion sealing air bag, a second expansion sealing air bag and a gasket. The sealing ductility of the sealing butterfly valve soft sealing structure with the good sealing performance can be improved through the first expansion sealing air bag and the second expansion sealing air bag, the situation that a gap is generated at the connecting position due to breaking is avoided, and therefore the sealing effect can be guaranteed, the use quality of the butterfly valve is improved, and use of workers is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a soft sealing structure of a sealing butterfly valve with good sealing performance. Background Art

[0002] The butterfly valve, also called the flap valve, is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. The butterfly valve refers to a valve whose closing member (valve disc or butterfly plate) is a disc that rotates around the valve shaft to achieve opening and closing.

[0003] The sealing structure of traditional butterfly valves is mostly a simple ring, and its own extension function is poor. After a long period of use, the sealing structure is prone to loosening or damage, which will affect the overall sealing performance of the butterfly valve, thereby causing inconvenience to people's use. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a soft sealing structure for a sealed butterfly valve with good sealing performance, which solves the problem that the sealing structure of traditional butterfly valves is mostly a simple ring-shaped structure, which has poor self-extension function and is prone to loosening or damage after a long period of use, thereby affecting the overall sealing performance of the butterfly valve, thereby causing inconvenience to people's use.

[0005] To achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a soft sealing structure of a sealed butterfly valve with good sealing performance, including a valve body, a valve plate is arranged inside the valve body, a valve stem is installed on the top of the valve plate, a first expansion sealing airbag is arranged on the front and back sides of the valve plate, the outer walls of the two first expansion sealing airbags are interference fit with the inner wall of the valve body, a first vertical pipe is fixedly connected to the top of the valve body, a connecting pipe is fixedly connected to the inner wall of the first vertical pipe, the inner wall of the connecting pipe is rotatably connected to the outer wall of the valve stem through a sealing bearing, a sealing ring movably connected to the outer wall of the valve stem is arranged at the lower part of the first vertical pipe, a second expansion sealing airbag interference fit with the inner wall of the first vertical pipe is arranged above the sealing ring, and the inner wall of the second expansion sealing airbag is movably connected to the outer wall of the valve stem.

[0006] Preferably, a plurality of mounting plates are installed on the outer wall of the valve body, and the plurality of mounting plates are all processed with mounting holes, and the outer wall of the valve plate is equidistantly installed with limiting plates that are tightly pressed against the outer wall of the first expansion sealing airbag in an annular shape.

[0007] Preferably, a gasket is installed in the inner wall groove of the valve body.

[0008] Preferably, a second vertical pipe is installed below the valve body, and the inner wall of the second vertical pipe is rotatably connected to the outer wall of the valve plate through a sealing bearing.

[0009] Preferably, a turntable is installed on the top of the valve stem, and the outer wall of the turntable is processed with grinding patterns.

[0010] Beneficial Effects

[0011] The utility model provides a soft sealing structure of a sealing butterfly valve with good sealing performance. The utility model has the following beneficial effects: the soft sealing structure of the sealing butterfly valve with good sealing performance can greatly improve the sealing performance of the butterfly valve through the cooperation of the valve body, the valve plate, the sealing ring, the first expansion sealing airbag, the second expansion sealing airbag and the gasket, and the sealing ductility of the soft sealing structure of the sealing butterfly valve with good sealing performance can be improved by the first expansion sealing airbag and the second expansion sealing airbag, so as to avoid the occurrence of breakage and the generation of gaps at the connection, thereby ensuring the sealing effect, improving the use quality of the butterfly valve, and facilitating the use of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 for Figure 1 A cross-sectional view of

[0014] Figure 3 for Figure 2 Schematic diagram of the structure of the middle valve plate, valve body and valve stem;

[0015] Figure 4 for Figure 2 Schematic diagram of the structure of the valve body, valve plate and limit plate.

[0016] In the figure: 1, valve body, 2, valve plate, 3, valve stem, 4, turntable, 5, sealing ring, 6, second expansion sealing airbag, 7, connecting pipe, 8, limit plate, 9, mounting plate, 10, first expansion sealing airbag, 11, second vertical pipe, 12, gasket, 13, first vertical pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0019] The sealing structure of traditional butterfly valves is mostly a simple ring, and its own extension function is poor. After a long period of use, the sealing structure is prone to loosening or damage, which will affect the overall sealing performance of the butterfly valve, thus causing inconvenience to people's use;

[0020] In view of this, the utility model provides a soft sealing structure of a sealed butterfly valve with good sealing performance. Through the cooperation of the valve body, valve plate, sealing ring, first expansion sealing airbag, second expansion sealing airbag and gasket, the sealing performance of the butterfly valve can be greatly improved. The first expansion sealing airbag and the second expansion sealing airbag can improve the sealing ductility of the soft sealing structure of the sealed butterfly valve with good sealing performance, avoiding breakage and causing gaps in the connection. Therefore, the sealing effect can be guaranteed, the use quality of the butterfly valve is improved, and it is convenient for the staff to use it.

[0021] Embodiment 1: By Figure 1 , 2 , 3 and 4 show that a sealing butterfly valve soft sealing structure with good sealing performance comprises a valve body 1, a valve plate 2 is arranged inside the valve body 1, a valve stem 3 is installed on the top of the valve plate 2, first expansion sealing airbags 10 are arranged on the front and back of the valve plate 2, the outer walls of the two first expansion sealing airbags 10 are interference fit with the inner wall of the valve body 1, a first vertical pipe 13 is fixedly connected to the top of the valve body 1, a connecting pipe 7 is fixedly connected to the inner wall of the first vertical pipe 13, the inner wall of the connecting pipe 7 is rotatably connected to the outer wall of the valve stem 3 through a sealing bearing, a sealing ring 5 movably connected to the outer wall of the valve stem 3 is arranged at the lower part of the first vertical pipe 13, a second expansion sealing airbag 6 interference fit with the inner wall of the first vertical pipe 13 is arranged above the sealing ring 5, and the inner wall of the second expansion sealing airbag 6 is movably connected to the outer wall of the valve stem 3;

[0022] In the specific implementation process, it is worth pointing out that the first inflatable sealing airbag 10 can improve the ductility during sealing, thereby improving the sealing performance, twisting the torsion bar 3 can change the angle of the valve plate 2 to achieve the opening and closing of the butterfly valve, and the second inflatable sealing airbag 6 can seal the valve stem 3 and the first vertical pipe 13;

[0023] Furthermore, a plurality of mounting plates 9 are installed on the outer wall of the valve body 1, and the plurality of mounting plates 9 are processed with mounting holes, and the outer wall of the valve plate 2 is annularly and equidistantly installed with limit plates 8 that are tightly pressed against the outer wall of the first expansion sealing airbag 10;

[0024] In the specific implementation process, it is worth pointing out that the staff can use the mounting plate 9 to mount the two valve bodies 1 together, thereby forming a complete butterfly valve housing, and the limiting plate 8 can mount the first expansion sealing airbag 10 on the surface of the valve plate 2, thereby improving the stability performance during use;

[0025] Furthermore, a gasket 12 is installed in the inner wall groove of the valve body 1;

[0026] In the specific implementation process, it is worth pointing out that the gasket 12 can improve the sealing performance of the two valve plates 1 during installation and also ensure the connection stability;

[0027] Furthermore, a second vertical pipe 11 is installed below the valve body 1, and the inner wall of the second vertical pipe 11 is rotatably connected to the outer wall of the valve plate 2 through a sealing bearing;

[0028] In the specific implementation process, it is worth pointing out that the second vertical pipe 11 can limit the bottom of the valve plate 2, thereby improving the operation quality of the valve plate 2 when in use;

[0029] Furthermore, a rotating disk 4 is installed on the top of the valve stem 3, and the outer wall of the rotating disk 4 is processed with grinding patterns;

[0030] In the specific implementation process, it is worth pointing out that the design of the turntable 4 enables the staff to more conveniently rotate the valve plate 2 through the valve stem 3, and the grinding pattern can increase the friction between the staff's hand and the turntable 4, thereby facilitating the use of the staff;

[0031] Specifically, when using the soft sealing structure of the sealing butterfly valve with good sealing performance, the staff twists the turntable 4, and the turntable 4 can drive the valve plate 2 to rotate through the valve stem 3. When the valve plate 2 rotates a certain angle, that is, the first expansion sealing airbag 10 is completely in contact with the inner wall of the valve body 1, the sealing blocking operation can be achieved, and the sealing ring 5 and the second expansion sealing airbag 6 can improve the sealing between the valve stem 3 and the first vertical pipe 13. When the first expansion sealing airbag 10 needs to be disassembled and replaced, the staff removes the limit plate 8, and then removes the first expansion sealing airbag 10, and then replaces it.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0033] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft sealing structure of a sealing butterfly valve with good sealing performance, comprising a valve body (1), characterized in that: A valve plate (2) is arranged inside the valve body (1), a valve stem (3) is installed on the top of the valve plate (2), first expansion sealing airbags (10) are arranged on the front and back sides of the valve plate (2), the outer walls of the two first expansion sealing airbags (10) are interference fit with the inner wall of the valve body (1), a first vertical tube (13) is fixedly connected to the top of the valve body (1), the inner wall of the first vertical tube (13) is fixedly connected to a connecting tube (7), the inner wall of the connecting tube (7) is rotatably connected to the outer wall of the valve stem (3) through a sealing bearing, a sealing ring (5) movably connected to the outer wall of the valve stem (3) is arranged at the bottom of the first vertical tube (13), a second expansion sealing airbag (6) interference fit with the inner wall of the first vertical tube (13) is arranged above the sealing ring (5), and the inner wall of the second expansion sealing airbag (6) is movably connected to the outer wall of the valve stem (3).

2. A soft sealing structure for a sealing butterfly valve with good sealing performance according to claim 1, characterized in that: The outer wall of the valve body (1) is installed with a plurality of mounting plates (9), and the plurality of mounting plates (9) are all processed with mounting holes, and the outer wall of the valve plate (2) is equidistantly installed with limiting plates (8) in an annular shape, which are tightly pressed against the outer wall of the first expansion sealing airbag (10).

3. A soft sealing structure for a sealing butterfly valve with good sealing performance according to claim 1, characterized in that: A gasket (12) is installed in the inner wall groove of the valve body (1).

4. A soft sealing structure for a sealing butterfly valve with good sealing performance according to claim 1, characterized in that: A second vertical pipe (11) is installed below the valve body (1), and the inner wall of the second vertical pipe (11) is rotatably connected to the outer wall of the valve plate (2) via a sealing bearing.

5. The soft sealing structure of a sealing butterfly valve with good sealing performance according to claim 1, characterized in that: A rotating disk (4) is installed on the top of the valve stem (3), and the outer wall of the rotating disk (4) is processed with grinding patterns.

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