Butterfly valve sealing structure and working method

Abstract

The present invention belongs to the technical field of engineering elements, and in particular to a butterfly valve sealing structure and a working method thereof; the present invention provides a butterfly valve sealing structure, comprising: a disc plate, which is flipped and arranged in a valve body; a sealing ring, which is arranged on the inner wall of the valve body and abuts against the outer wall of the disc plate; a fastener, which is telescopically arranged in the sealing ring, and the inner wall of the valve body is provided with a fixing groove adapted to the fastener; wherein, when the disc plate is flipped to a closed state, the disc plate squeezes the fastener to expand and deform outwardly so that the fastener is inserted into the fixing groove; when the disc plate is flipped to an open state, the fastener contracts and deforms inwardly so as to protrude from the inner wall of the sealing ring; through the cooperation of the disc plate, the sealing ring and the fastener, the sealing effect of the disc plate and the sealing ring is improved when the disc plate is closed, while the stability of the fixation between the sealing ring and the valve body is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering components, and specifically relates to valves, and in particular to a butterfly valve sealing structure and a working method thereof. Background Art

[0002] The butterfly valve is a simple regulating valve that controls the flow of fluid by flipping the disc.

[0003] During use, the sealing ring will age or be damaged, which will cause leakage in the butterfly valve. Therefore, in order to improve the sealing performance of the butterfly valve, a sealing ring is usually set on the inner wall of the valve body, and the disc plate is turned over to abut against the sealing ring to achieve a sealing effect. However, the sealing effect of the sealing ring and the valve body will decrease due to long-term cooperation, causing leakage.

[0004] Therefore, how to prevent the sealing ring and the valve body from leaking due to long-term use is a technical problem that needs to be solved urgently in this field.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0006] The embodiments of the present disclosure at least provide a butterfly valve sealing structure and a working method thereof.

[0007] In a first aspect, an embodiment of the present disclosure provides a butterfly valve sealing structure, comprising:

[0008] A disc plate, which is turned over and arranged in the valve body;

[0009] A sealing ring, which is arranged on the inner wall of the valve body and abuts against the outer wall of the disc plate;

[0010] The fastener is telescopically arranged in the sealing ring, and the inner wall of the valve body is provided with a fixing groove adapted to the fastener;

[0011] When the disc plate is turned over to a closed state, the disc plate squeezes the fastener to expand outward and deform, so that the fastener is inserted into the fixing groove;

[0012] When the disc plate is flipped to an open state, the fastener contracts and deforms inwardly to protrude from the inner wall of the sealing ring.

[0013] In an optional embodiment, the sealing ring is provided with two adjusting ring openings in the radial direction, and the two adjusting ring openings are parallel to each other and penetrate the sealing ring;

[0014] A plurality of connecting rods are axially arranged in each of the adjusting ring openings, and the connecting rods are integrally arranged with the sealing ring;

[0015] The fastener is telescopically arranged in the adjusting ring opening, and the inner diameter of the fastener is smaller than the inner diameter of the sealing ring;

[0016] Wherein, when the disc plate is in an open state, the fastener is suitable for reducing the impact force of water flow on the inner wall of the water outlet end of the valve body.

[0017] In an optional embodiment, the fastener is made of elastic material so that it can be elastically deformed when squeezed by the disc plate and return to its original shape when the disc plate is released.

[0018] In an optional embodiment, the fastener comprises: an inner ring and an outer ring, the outer diameters of the inner ring and the outer ring are consistent, and the inner diameter of the inner ring is larger than the inner diameter of the outer ring;

[0019] When the disc plate squeezes the inner ring and the outer ring to expand and deform outward, the outer rings of the inner ring and the outer ring are suitable for being inserted into the fixing groove.

[0020] In an optional embodiment, the fastener includes: a connecting ring, which is arranged between the inner ring and the outer ring, and the connecting ring, the inner ring and the outer ring are arranged as one body; a connecting groove is opened between the two adjusting ring openings, the connecting groove is arranged along the axial direction of the sealing ring, and the connecting ring is slidably arranged in the connecting groove.

[0021] In an optional embodiment, the inner ring and the outer ring are provided with a plurality of adjustment grooves along the axial direction;

[0022] The connecting rod is slidably arranged in the adjusting groove, and the slotting length of the adjusting groove is greater than the width of the connecting rod.

[0023] In an optional embodiment, a spiral groove is provided on the inner wall of the regulating ring near the water inlet end of the valve body;

[0024] When the inner ring contracts into the adjusting ring opening, the spiral groove is suitable for guiding the fluid to flow in a direction away from the disc plate.

[0025] In an optional embodiment, an adjusting handle is rotatably provided on the upper end of the valve body, and the adjusting handle is sleeved on the outer wall of the rotating shaft of the disc plate;

[0026] A positioning plate is arranged at the upper end of the valve body, and a plurality of positioning racks are arranged circumferentially on the outer wall of the positioning plate;

[0027] A positioning handle is hinged at the lower end of the adjustment handle, and a bite tooth block matching the positioning rack is arranged on the side of the positioning handle close to the positioning disk;

[0028] A return spring is arranged between the adjusting handle and the positioning handle, and the return spring is arranged at an end of the adjusting handle away from the disc plate;

[0029] When the positioning handle moves upward to squeeze the reset spring to deform, the engaging tooth block is separated from the positioning rack.

[0030] In an optional embodiment, it includes:

[0031] The valve body has a disc plate disposed therein;

[0032] A sealing ring, which is arranged on the inner wall of the valve body and is suitable for abutting against the disc plate;

[0033] The fastener is telescopically arranged in the sealing ring, and the inner wall of the valve body is provided with a fixing groove adapted to the fastener;

[0034] The sealing ring is provided with two adjusting ring openings in the radial direction, and a plurality of connecting rods are arranged in the axial direction in each of the adjusting ring openings, and the connecting rods are arranged integrally with the sealing ring;

[0035] The inner diameter of the fastener is smaller than the inner diameter of the sealing ring, and the fastener is made of elastic material;

[0036] A spiral groove is provided at the regulating ring port near the water inlet end of the valve body;

[0037] When the disc plate is turned over to a closed state, the disc plate squeezes the fastener to expand outward and deform, so that the fastener is inserted into the fixing groove;

[0038] At the moment when the disc plate changes from the open state to the closed state, the spiral groove is suitable for guiding the fluid to flow away from the disc plate;

[0039] When the disc plate is flipped to the open state, the inner circle of the fastener protrudes from the inner circle of the sealing ring to reduce the impact force of the water flow on the inner wall of the water outlet end of the valve body.

[0040] In an optional embodiment, the fastener comprises: an inner ring and an outer ring, the outer diameters of the inner ring and the outer ring are consistent, and the inner diameter of the inner ring is larger than the inner diameter of the outer ring;

[0041] A connecting ring, wherein the connecting ring is arranged between the inner ring and the outer ring, and the connecting ring, the inner ring and the outer ring are arranged integrally;

[0042] When the disc plate squeezes the inner ring and the outer ring to expand outward, the outer rings of the inner ring and the outer ring are suitable for being inserted into the fixing groove;

[0043] A connecting groove is provided between the two adjusting ring openings. The connecting groove is arranged along the axial direction of the sealing ring, and the connecting ring is slidably arranged in the connecting groove.

[0044] In an optional embodiment, the inner ring and the outer ring are provided with a plurality of adjustment grooves along the axial direction;

[0045] The connecting rod is slidably arranged in the adjusting groove, and the slotting length of the adjusting groove is greater than the width of the connecting rod.

[0046] In a second aspect, the embodiment of the present disclosure further provides a working method of a butterfly valve, the working method comprising:

[0047] When the disc plate flips from the open state to the closed state, the disc plate squeezes the fastener and expands outward to allow the fastener to be inserted into the fixing groove;

[0048] At the moment when the disc plate changes from the open state to the closed state, the spiral groove is suitable for guiding the fluid to flow away from the disc plate;

[0049] When the disc plate flips from the closed state to the open state, the inner circle of the fastener protrudes from the inner circle of the sealing ring to reduce the impact force of the water flow on the inner wall of the water outlet end of the valve body.

[0050] The beneficial effect of the present invention is that a butterfly valve sealing structure and a working method thereof, through the cooperation of the disc plate, the sealing ring and the fastener, realizes the improvement of the sealing effect between the disc plate and the sealing ring when the disc plate is closed, and at the same time improves the stability of the fixation between the sealing ring and the valve body; when the disc plate is in an open state, the inner ring of the fastener protrudes from the inner ring of the sealing ring to reduce the impact force of the water flow on the inner wall of the water outlet end of the valve body, thereby improving the service life of the equipment.

[0051] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0054] Figure 1 A three-dimensional diagram of a butterfly valve sealing structure provided in an embodiment of the present disclosure;

[0055] Figure 2 A perspective view of a fastener provided for an embodiment of the present disclosure;

[0056] Figure 3 A cutaway perspective view of a fastener provided for an embodiment of the present disclosure;

[0057] Figure 4A schematic diagram of the state of the sealing ring and the fastener when the disc plate provided in the embodiment of the present disclosure is in the open state;

[0058] Figure 5 A schematic diagram of the state of the sealing ring and the fastener when the disc plate provided in the embodiment of the present disclosure is in the closed state;

[0059] Figure 6 A schematic diagram of an adjustment groove on the inner wall of an adjustment opening of a sealing ring provided in an embodiment of the present disclosure;

[0060] Figure 7 A cutaway perspective view of a valve body and an adjustment handle provided in an embodiment of the present disclosure;

[0061] Figure 8 A perspective view of a positioning handle provided for an embodiment of the present disclosure.

[0062] In the figure:

[0063] 1. Disc plate; 2. Valve body; 20. Fixing groove; 21. Adjusting handle; 22. Positioning rack; 23. Positioning plate; 24. Positioning handle; 25. Engaging tooth block; 26. Return spring; 27. Articulated shaft;

[0064] 3. Sealing ring; 30. Adjusting ring; 31. Connecting rod; 32. Connecting groove;

[0065] 4. Fastener; 41. Inner ring; 42. Outer ring; 43. Connecting ring; 44. Spiral groove; 45. Adjustment groove. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] In this article, when it is mentioned that the first component is located on the second component, this may mean that the first component may be directly formed on the second component, or the third component may be interposed between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components may be exaggerated or reduced.

[0068] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0069] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0070] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0071] Research has found that the disadvantages of the prior art are that during use, the sealing ring ages or is damaged, which can cause leakage in the butterfly valve. Therefore, in order to improve the sealing performance of the butterfly valve, a sealing ring is often set on the inner wall of the valve body, and the disc plate is turned over to abut against the sealing ring to achieve a sealing effect. However, due to the long-term erosion of the fluid in the valve body and the impact of the fluid flow rate, the fixing stability between the sealing ring and the valve body becomes poor, thereby affecting the sealing performance.

[0072] Therefore, how to avoid the deterioration of the fixing stability between the sealing ring and the valve body is a technical problem that needs to be solved urgently in this field.

[0073] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present invention in this article for the above problems should be the contributions made by the inventor to the present invention during the disclosure process.

[0074] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0075] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0076] Based on the above situation, the inventors have proposed a method to overcome the above technical problems by improving the long-term fixing stability between the sealing ring and the valve body, which is specifically implemented by the following implementation method.

[0077] like Figures 1 to 8 As shown, at least one embodiment provides a butterfly valve sealing structure, including: a disc plate 1, which is flipped and arranged in a valve body 2; the two sides of the valve body 2 are respectively fixed to the pipeline. In order to realize the flipping of the disc plate 1, an adjusting device is arranged on the outer wall of the valve body 2, and the adjusting device is rotatably arranged on the outer wall of the valve body 2, and the side wall of the disc plate 1 is fixed to the side wall of the rotating shaft of the adjusting device. Rotating the adjusting device is suitable for driving the disc plate 1 to flip, so as to realize opening or closing of the valve body 2.

[0078] Reference Figure 4 The sealing ring 3 is arranged on the inner wall of the valve body 2 and abuts against the outer wall of the disc plate 1; the arrangement of the sealing ring 3 improves the sealing performance between the disc plate 1 and the inner wall of the valve body 2.

[0079] Reference Figure 2 The fastener 4 is telescopically arranged in the sealing ring 3, and the inner wall of the valve body 2 is provided with a fixing groove 20 adapted to the fastener 4. The fastener 4 is made of elastic material so that it can produce elastic deformation when squeezed by the disc plate 1 and return to its original state when the disc plate 1 is released.

[0080] Reference Figure 3 and Figure 4When the disc plate 1 is turned over to the closed state, the disc plate 1 squeezes the fastener 4 to expand outward and deform, so that the fastener 4 is inserted into the fixing groove 20; when the disc plate 1 is turned over to the open state, the fastener 4 shrinks inward and deforms to protrude from the inner wall of the sealing ring 3. Through the cooperation of the disc plate 1, the sealing ring 3 and the fastener 4, the sealing effect between the disc plate 1 and the sealing ring 3 is improved when the disc plate 1 is closed, and the stability of the fixation between the sealing ring 3 and the valve body 2 is improved; and when the disc plate 1 is in the open state, the inner circle of the fastener 4 protrudes from the inner circle of the sealing ring 3 to reduce the impact of the water flow on the inner wall of the water outlet end of the valve body 2, thereby improving the service life of the equipment.

[0081] Continue to refer to the attached Figure 4 The sealing ring 3 is provided with two adjusting ring openings 30 in the radial direction, and the two adjusting ring openings 30 are parallel to each other and penetrate the sealing ring 3. The fastener 4 is telescopically arranged in the adjusting ring opening 30, and the inner diameter of the fastener 4 is smaller than the inner diameter of the sealing ring 3. When the fastener 4 expands and deforms radially outward in the adjusting ring opening 30, the inner ring of the fastener 4 abuts against the disc plate 1, and the outer ring is inserted into the fixing groove 20. This structure not only improves the stability of the fixing between the sealing ring 3 and the valve body 2, but also improves the airtightness between the sealing ring 3 and the disc plate 1.

[0082] Reference Figure 5 In order to improve the integrity and stability of the sealing ring 3, a plurality of connecting rods 31 are axially arranged in each of the adjusting ring openings 30, and the connecting rods 31 are integrally arranged with the sealing ring 3. The arrangement of a plurality of connecting rods 31 improves the integrity of the various parts of the sealing ring 3 when the sealing ring 3 is fixed to the inner wall of the valve body 2.

[0083] Continue to refer to the attached Figure 4 When the disc plate 1 is in the open state, the fastener 4 can reduce the impact force of the water flow on the inner wall of the water outlet end of the valve body 2. Since the fastener 4 has a certain elasticity, when the impact force of the water flow is large, the fastener 4 can be deformed in the direction of the fixing groove 20 by the impact of the water flow, thereby avoiding the loosening between the sealing ring 3 and the valve body 2. At the same time, the inner ring of the fastener 4 protrudes from the inner ring of the sealing ring 3, which can reduce the impact pressure of the water flow on the inner wall of the pipeline behind the sealing ring 3, that is, the inner wall of the water pipe at the water outlet end of the valve body 2 after the water flow passes through the sealing ring 3, thereby improving the stability of the connection between the valve body 2 and the pipeline.

[0084] Reference Figure 2 The fastener 4 includes: an inner ring 41 and an outer ring 42, wherein the outer diameters of the inner ring 41 and the outer ring 42 are the same, and the inner diameter of the inner ring 41 is larger than the inner diameter of the outer ring 42. A connecting ring 43, wherein the connecting ring 43 is arranged between the inner ring 41 and the outer ring 42, and the connecting ring 43, the inner ring 41 and the outer ring 42 are arranged integrally. Figure 3As shown, the connection ring 43 is provided so that the longitudinal section of the fastener 4 is "H" shaped. When the disc plate 1 turns over to close the valve body 2, the inner ring 41 and the outer ring 42 are simultaneously squeezed outward by the disc plate 1 to expand and deform.

[0085] Reference Figure 3 In order to improve the stability of the fastener 4 and the fixing groove 20, the inner ring 41 and the outer ring 42 are provided with a convex ring adapted to the fixing groove 20 near the inner wall of the valve body 2. When the inner ring 41 and the outer ring 42 are deformed toward the fixing groove 20, the convex ring is suitable for inserting into the fixing groove 20 to improve the stability between the sealing ring 3 and the inner wall of the valve body 2.

[0086] Reference Figure 5 When the disc plate 1 squeezes the inner ring 41 and the outer ring 42 to expand outward, the outer rings of the inner ring 41 and the outer ring 42 are suitable for inserting into the fixing groove 20 to improve the stability between the sealing ring 3 and the valve body 2.

[0087] Reference Figure 3 In order to adapt the connecting ring 43, a connecting groove 32 is provided between the two adjusting ring openings 30. The connecting groove 32 is provided along the axial direction of the sealing ring 3, and the connecting ring 43 is slidably provided in the connecting groove 32. The slot length of the connecting groove 32 is greater than the thickness of the connecting ring 43. When the inner ring 41 and the outer ring 42 move radially, the connecting ring 43 slides in the connecting groove 32.

[0088] Reference Figure 3 and Figure 4 The inner ring 41 and the outer ring 42 are provided with a plurality of adjustment grooves 45 along the axial direction; the connecting rod 31 is slidably arranged in the adjustment groove 45 , and the groove length of the adjustment groove 45 is greater than the width of the connecting rod 31 .

[0089] Reference Figure 6 The inner wall of the regulating ring opening 30 close to the water inlet end of the valve body 2 is provided with a spiral groove 44 ; when the inner ring 41 contracts into the regulating ring opening 30 , the spiral groove 44 is suitable for guiding the fluid to flow away from the disc plate 1 .

[0090] Reference Figure 7The valve body 2 is rotatably provided with an adjusting handle 21 at the upper end, and the adjusting handle 21 is sleeved on the outer wall of the rotating shaft of the disc plate 1; the valve body 2 is provided with a positioning plate 23 at the upper end, and a plurality of positioning racks 22 are circumferentially provided on the outer wall of the positioning plate 23; the adjusting handle 21 is suitable for circumferential rotation relative to the positioning plate 23. A positioning handle 24 is hingedly connected to the lower end of the adjusting handle 21, and a hinge shaft 27 between the positioning handle 24 and the adjusting handle 21 is provided between the reset spring 26 and the rotating shaft of the disc plate 1. A bite tooth block 25 adapted to the positioning rack 22 is provided on the side of the positioning handle 24 close to the positioning plate 23; the bite tooth block 25 is meshed with the positioning rack 22. A return spring 26 is provided between the adjusting handle 21 and the positioning handle 24. The return spring 26 is provided at the end of the adjusting handle 21 away from the disc plate 1. The return spring 26 is suitable for pushing the positioning handle 24 to flip downward, so that the bite tooth block 25 and the positioning rack 22 are meshed with each other, so as to limit the flipping of the disc plate 1. When the end of the positioning handle 24 away from the bite tooth block 25 moves upward to squeeze the return spring 26 and deform, the bite tooth block 25 is separated from the positioning rack 22. At this time, the adjusting handle 21 is suitable for rotating relative to the positioning disk 23 to open and close the valve body 2.

[0091] Reference Figure 1 At least one embodiment provides a butterfly valve sealing structure, comprising: a valve body 2, in which a disc plate 1 is turned over; a sealing ring 3, which is arranged on the inner wall of the valve body 2 and is suitable for abutting against the disc plate 1; a fastener 4, which is telescopically arranged in the sealing ring 3, and the inner wall of the valve body 2 is provided with a fixing groove 20 adapted to the fastener 4; the sealing ring 3 is provided with two adjusting ring openings 30 in the radial direction, and a plurality of connecting rods 31 are axially arranged in each of the adjusting ring openings 30, and the connecting rods 31 are integrally arranged with the sealing ring 3; the inner diameter of the fastener 4 is smaller than the inner diameter of the fastener 4. The inner diameter of the sealing ring 3 is adjusted, and the fastener 4 is made of elastic material; a spiral groove 44 is provided at the water inlet end of the regulating ring 30 close to the valve body 2; wherein, when the disc plate 1 is flipped to the closed state, the disc plate 1 squeezes the fastener 4 to expand and deform outward so that the fastener 4 is inserted into the fixing groove 20; at the moment when the disc plate 1 changes from the open state to the closed state, the spiral groove 44 is suitable for guiding the fluid to flow in the direction away from the disc plate 1; when the disc plate 1 is flipped to the open state, the inner circle of the fastener 4 protrudes from the inner circle of the sealing ring 3 to reduce the impact force of the water flow on the inner wall of the water outlet end of the valve body 2.

[0092] At least one embodiment provides a working method of a butterfly valve, the working method comprising: when the disc plate 1 flips from an open state to a closed state, the disc plate 1 squeezes the fastener 4 to expand and deform outward so that the fastener 4 is inserted into the fixing groove 20; at the moment when the disc plate 1 changes from an open state to a closed state, the spiral groove 44 is suitable for guiding the fluid to flow in a direction away from the disc plate 1; when the disc plate 1 flips from a closed state to an open state, the inner circle of the fastener 4 protrudes from the inner circle of the sealing ring 3 to reduce the impact force of the water flow on the inner wall of the water outlet end of the valve body 2.

[0093] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0095] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A butterfly valve sealing structure, characterized in that: include: A disc plate (1) which is turned over and arranged inside the valve body (2); A sealing ring (3) which is arranged on the inner wall of the valve body (2) and abuts against the outer wall of the disc plate (1); A fastener (4) is telescopically arranged in the sealing ring (3), and a fixing groove (20) adapted to the fastener (4) is provided on the inner wall of the valve body (2); When the disc plate (1) is flipped to a closed state, the disc plate (1) squeezes the fastener (4) to expand and deform outward, so that the fastener (4) is inserted into the fixing groove (20); When the disc plate (1) is flipped to an open state, the fastener (4) contracts and deforms inwardly to protrude from the inner wall of the sealing ring (3); The sealing ring (3) is provided with two adjustment ring openings (30) along the radial direction, and the two adjustment ring openings (30) are parallel to each other and penetrate the sealing ring (3); A plurality of connecting rods (31) are axially arranged in each of the adjusting ring openings (30), and the connecting rods (31) are integrally arranged with the sealing ring (3); The fastener (4) is telescopically arranged in the adjustment ring opening (30); When the disc plate (1) is in an open state, the inner diameter of the fastener (4) is smaller than the inner diameter of the sealing ring (3), and the fastener (4) is suitable for reducing the impact force of water flow on the inner wall of the water outlet end of the valve body (2).

2. The butterfly valve sealing structure according to claim 1, characterized in that: The fastener (4) is made of an elastic material so that it can produce elastic deformation when squeezed by the disc plate (1) and return to its original shape when the disc plate (1) is released.

3. The butterfly valve sealing structure according to claim 2, characterized in that: The fastener (4) comprises: an inner ring (41) and an outer ring (42); the outer diameters of the inner ring (41) and the outer ring (42) are consistent, and the inner diameter of the inner ring (41) is greater than the inner diameter of the outer ring (42); When the disc plate (1) squeezes the inner ring (41) and the outer ring (42) to expand and deform outward, the outer rings of the inner ring (41) and the outer ring (42) are suitable for being inserted into the fixing groove (20).

4. The butterfly valve sealing structure according to claim 3, characterized in that: The fastener (4) comprises: a connecting ring (43), wherein the connecting ring (43) is arranged between the inner ring (41) and the outer ring (42), and the connecting ring (43), the inner ring (41) and the outer ring (42) are arranged as one body; A connecting groove (32) is provided between the two adjusting ring openings (30), the connecting groove (32) is arranged along the axial direction of the sealing ring (3), and the connecting ring (43) is slidably arranged in the connecting groove (32).

5. The butterfly valve sealing structure according to claim 3, characterized in that: The inner ring (41) and the outer ring (42) are provided with a plurality of adjustment grooves along the axial direction; The connecting rod (31) is slidably disposed in the adjusting groove, and the groove length of the adjusting groove is greater than the width of the connecting rod (31).

6. The butterfly valve sealing structure according to claim 5, characterized in that: The inner wall of the regulating ring opening (30) close to the water inlet end of the valve body (2) is provided with a spiral groove (44); When the inner ring (41) is retracted into the adjusting ring opening (30), the spiral groove (44) is suitable for guiding the fluid to flow in a direction away from the disc plate (1).

7. The butterfly valve sealing structure according to claim 1, characterized in that: An adjusting handle (21) is rotatably provided on the upper end of the valve body (2), and the adjusting handle (21) is sleeved on the outer wall of the rotating shaft of the disc plate (1); A positioning plate (23) is arranged at the upper end of the valve body, and a plurality of positioning racks (22) are arranged in the circumferential direction of the outer wall of the positioning plate (23); A positioning handle (24) is hingedly connected to the lower end of the adjustment handle (21); a bite tooth block (25) adapted to the positioning rack (22) is provided on a side of the positioning handle (24) close to the positioning plate (23); A return spring (26) is arranged between the adjusting handle (21) and the positioning handle (24), and the return spring (26) is arranged at an end of the adjusting handle (21) away from the disc plate; When the positioning handle (24) moves upward to squeeze the return spring (26) and deform it, the engaging tooth block (25) separates from the positioning rack (22).

8. A butterfly valve sealing structure, characterized in that: include: A valve body (2) having a disc plate (1) disposed therein in an inverted manner; A sealing ring (3), which is arranged on the inner wall of the valve body (2) and is suitable for abutting against the disc plate (1); The sealing ring (3) is provided with two adjusting ring openings (30) in the radial direction, and a plurality of connecting rods (31) are arranged in the axial direction in each of the adjusting ring openings (30), and the connecting rods (31) are integrally arranged with the sealing ring (3); A fastener (4) is telescopically arranged in the adjusting ring opening (30), and a fixing groove (20) adapted to the fastener (4) is provided on the inner wall of the valve body (2); The inner diameter of the fastener (4) is smaller than the inner diameter of the sealing ring (3), and the fastener (4) is made of elastic material; A spiral groove (44) is formed on the regulating ring opening (30) near the water inlet end of the valve body (2); When the disc plate (1) is flipped to a closed state, the disc plate (1) squeezes the fastener (4) to expand and deform outward, so that the fastener (4) is inserted into the fixing groove (20); At the moment when the disc plate (1) changes from an open state to a closed state, the spiral groove (44) is suitable for guiding the fluid to flow in a direction away from the disc plate (1); When the disc plate (1) is flipped to an open state, the inner ring of the fastener (4) protrudes from the inner ring of the sealing ring (3) to reduce the impact force of the water flow on the inner wall of the water outlet end of the valve body (2).

9. The butterfly valve sealing structure according to claim 8, characterized in that: The fastener (4) comprises: an inner ring (41) and an outer ring (42); the outer diameters of the inner ring (41) and the outer ring (42) are consistent, and the inner diameter of the inner ring (41) is greater than the inner diameter of the outer ring (42); A connecting ring (43), wherein the connecting ring (43) is arranged between the inner ring (41) and the outer ring (42), and the connecting ring (43), the inner ring (41) and the outer ring (42) are arranged as one body; When the disc plate (1) squeezes the inner ring (41) and the outer ring (42) to expand and deform outward, the outer rings of the inner ring (41) and the outer ring (42) are suitable for being inserted into the fixing groove (20); A connecting groove (32) is provided between the two adjusting ring openings (30), the connecting groove (32) is arranged along the axial direction of the sealing ring (3), and the connecting ring (43) is slidably arranged in the connecting groove (32).

10. The butterfly valve sealing structure according to claim 9, characterized in that: The inner ring (41) and the outer ring (42) are provided with a plurality of adjustment grooves along the axial direction; The connecting rod (31) is slidably disposed in the adjusting groove, and the groove length of the adjusting groove is greater than the width of the connecting rod (31).

11. A method for operating a butterfly valve, characterized in that: Using the butterfly valve sealing structure according to any one of claims 1 to 10, the working method comprises: The inner wall of the regulating ring opening (30) close to the water inlet end of the valve body (2) is provided with a spiral groove (44); When the disc plate (1) flips from the open state to the closed state, the disc plate (1) squeezes the fastener (4) to expand and deform outward, so that the fastener (4) is inserted into the fixing groove (20); At the moment when the disc plate (1) changes from an open state to a closed state, the spiral groove (44) is suitable for guiding the fluid to flow in a direction away from the disc plate (1); When the disc plate (1) flips from a closed state to an open state, the inner ring of the fastener (4) protrudes from the inner ring of the sealing ring (3) to reduce the impact force of the water flow on the inner wall of the water outlet end of the valve body (2).

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