Butterfly valve with self-cleaning function

Abstract

The invention relates to the technical field of butterfly valves, in particular to a butterfly valve with a self-cleaning function, which comprises a valve body, a rotary handle, a valve rod and a butterfly plate and further comprises a cleaning ring, the cleaning ring coaxially slides in the valve body, and the outer side of the cleaning ring abuts against the inner wall of the valve body. A reciprocating pulling mechanism is arranged in the side wall of the valve body and is in driving connection with the cleaning ring; the butterfly valve has the beneficial effects that the cleaning ring is slidably mounted in the valve body and is in driving connection with the impeller on the opened butterfly plate through the reciprocating pulling mechanism in the side wall of the valve body, after the butterfly plate is opened, liquid flowing through the valve body impacts the impeller to rotate, the impeller drives the reciprocating pulling mechanism to operate when rotating, and the cleaning ring is driven to rotate; the reciprocating pulling mechanism drives the cleaning ring to slide in a reciprocating mode to clean the inner wall of the valve body, the cleaning ring can continuously move in a reciprocating mode when liquid flows through the valve body, the inner wall of the valve body is cleaned, and thorough cleaning is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valves, and in particular to a butterfly valve with a self-cleaning function. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve with a closing member as a disc, which rotates around the valve axis to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a cutting and throttling role in the pipeline. The butterfly valve opening and closing member is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulation.

[0003] Chinese patent document CN 219176959 U discloses a butterfly valve with a self-cleaning function, including a valve body, a butterfly plate and an adjusting knob, wherein the butterfly plate is rotatably connected to the middle part of the valve body, and a rotating rod is bolted to the top of the butterfly plate, the adjusting knob is arranged at the top of the valve body, and the adjusting knob is connected to the rotating rod, and push-out structures are arranged at the upper and lower parts of the front and rear sides of the butterfly plate; the application provides the butterfly valve with a self-cleaning function and a large self-cleaning range by arranging the push-out structure, a cleaning ring, a fixing groove, a cleaning brush and a reset structure, and can effectively clean most of the inner wall of the valve body, improve the cleaning effect of the inner wall of the butterfly valve, make it difficult for impurities to adhere to the inner wall surface of the butterfly valve, extend the service life of the butterfly valve, and solve the problem that the cleaning range of the existing butterfly valve is small during the self-cleaning process and other positions cannot be effectively cleaned.

[0004] Although the above disclosed device can clean the inner wall of the valve body, the cleaning ring can only slide to clean the inner wall of the valve body when the butterfly plate is opened and closed. If the dirt on the inner wall of the valve body is too stubborn, it is difficult for the cleaning ring to completely scrape off the dirt in one back and forth movement, and the cleaning effect is poor.

[0005] Therefore, a butterfly valve with a self-cleaning function is needed to solve the above problems. Summary of the invention

[0006] In order to solve the above problem, that is, to solve the problem that the existing butterfly valve with a self-cleaning function has a poor cleaning effect, the present invention provides a butterfly valve with a self-cleaning function.

[0007] A butterfly valve with a self-cleaning function comprises a valve body, a rotating handle, a valve stem and a butterfly plate, and also comprises a cleaning ring, wherein the cleaning ring coaxially slides inside the valve body, and the outer side of the cleaning ring abuts against the inner wall of the valve body, a reciprocating pulling mechanism is arranged inside the side wall of the valve body, the reciprocating pulling mechanism is drivingly connected to the cleaning ring, an impeller is rotatably mounted on the side of the butterfly plate, an active bevel gear is rotatably mounted on the valve stem, the active bevel gear is drivingly connected to the impeller, and when the butterfly plate is rotated ninety degrees to open, the active bevel gear The movable bevel gear is drivingly connected to the reciprocating pulling mechanism; a cleaning ring is slidably installed in the valve body, and is drivingly connected to the impeller on the opened butterfly plate through the reciprocating pulling mechanism in the side wall of the valve body. When the butterfly plate is opened, the liquid flowing through the valve body will impact the impeller to rotate. When the impeller rotates, the reciprocating pulling mechanism is driven to operate. The reciprocating pulling mechanism drives the cleaning ring to slide back and forth to clean the inner wall of the valve body. This arrangement enables the cleaning ring to continue to reciprocate when liquid flows through the valve body, thereby cleaning the inner wall of the valve body and ensuring thorough cleaning.

[0008] Preferably, a sealing ring is coaxially fixedly installed on the inner surface of the valve body, and the sealing ring is located in the middle position inside the valve body. The top and bottom ends of the valve stem both penetrate the sealing ring. When the butterfly plate is closed, the outer side of the butterfly plate is tightly connected to the inner side of the sealing ring.

[0009] Preferably, reciprocating sliding rings are slidably installed on both sides of the sealing ring, the reciprocating sliding ring is connected to the sealing ring by a reset spring, the inner diameter of the reciprocating sliding ring is larger than the inner diameter of the sealing ring, a plurality of cleaning rings are coaxially fixedly installed on the outer side of the reciprocating sliding ring, four driving sliding grooves are provided on the inner surface of the valve body, the four driving sliding grooves are respectively located on both sides of the sealing ring and are symmetrically distributed in pairs, the driving sliding grooves are parallel to the axis of the valve body, inclined plates are symmetrically fixedly installed on the outer sides of the two reciprocating sliding rings, and the inclined plates slide in the corresponding driving sliding grooves.

[0010] Preferably, the reciprocating pulling mechanism includes a screw chamber, which is opened in the side wall of the valve body, parallel to the driving slide groove, and connected with the driving slide groove through a connecting slide hole. A reciprocating screw is rotatably installed inside the screw chamber, a sliding sleeve is coaxially slidably installed on the outer surface of the reciprocating screw, a mounting rod is fixedly installed on the inner surface of the sliding sleeve, a guide block is coaxially rotatably installed on the outer surface of the mounting rod, and the guide block slides in the screw groove of the reciprocating screw.

[0011] Preferably, a connecting slide rod is fixedly installed on the outer surface of the sliding sleeve, one end of the connecting slide rod passes through the connecting slide hole and extends into the driving slide groove and is hinged with a hook plate through a torsion spring shaft, and the side of the inclined plate away from the sealing ring and the side of the hook plate close to the sealing ring are both inclined surfaces, and an adjusting inclined groove is opened at one end of the driving slide groove away from the sealing ring; by arranging a rotatable hook plate and opening an adjusting inclined groove at the end of the driving slide groove away from the sealing ring, when the reciprocating screw rotates, the inclined plate can be pulled by the hook plate to slide the reciprocating sliding ring to the end away from the sealing ring, and the cleaning ring cleans the wall of the valve body while sliding. When one end of the hook plate enters the adjusting inclined groove, the hook plate is driven by the inclined surface of the adjusting inclined groove to rotate, and the inclined plate is released. The reciprocating sliding ring is quickly reset under the pull of the reset spring. While resetting, the cleaning ring will quickly clean the wall of the valve body, and the cleaning effect is better. Then the sliding sleeve is reset as the reciprocating screw rotates, so that the hook plate hooks the inclined plate, and the inner wall of the valve body can be continuously cleaned in this cyclic operation.

[0012] Preferably, a linkage cavity is opened on the side of the valve stem, the linkage cavity is coaxial with the valve stem, one end of the reciprocating screw extends into the linkage cavity and is coaxially fixedly mounted with a driven bevel gear.

[0013] Preferably, the active bevel gear is rotatably mounted inside the valve stem via a transmission rod, and a portion of the active bevel gear extends into the linkage cavity.

[0014] Preferably, impeller grooves are provided on both sides of the butterfly plate, the impeller grooves do not penetrate the butterfly plate, the impeller rotates in the impeller grooves through the impeller shaft, a part of the impeller extends out of the impeller grooves, and the impeller shaft is connected to the transmission rod through a transmission belt transmission; by rotatably installing the impeller in the impeller grooves provided on both sides of the butterfly plate, and making a part of the impeller extend out of the impeller grooves, when the butterfly plate is rotated ninety degrees to open, the flowing liquid will impact the impeller exposed outside the impeller groove, so that the impeller drives the active bevel gear to rotate, and then the active bevel gear drives the reciprocating screw to rotate through the driven bevel gear. Through this arrangement, the liquid flowing through the valve body can provide the power required for cleaning, without the need for external power, thereby achieving an energy-saving effect.

[0015] The beneficial effects of the present invention are: 1. The present invention installs a cleaning ring in a sliding manner in the valve body, and drives the cleaning ring to be connected to the impeller on the opened butterfly plate through a reciprocating pulling mechanism in the side wall of the valve body. When the butterfly plate is opened, the liquid flowing through the valve body will impact the impeller to rotate. When the impeller rotates, the reciprocating pulling mechanism is driven to operate. The reciprocating pulling mechanism drives the cleaning ring to slide back and forth to clean the inner wall of the valve body. This arrangement enables the cleaning ring to continue to reciprocate when liquid flows through the valve body, thereby cleaning the inner wall of the valve body and ensuring thorough cleaning.

[0016] 2. The present invention provides a rotatable hook plate and opens an adjusting bevel groove at the end of the driving slide groove away from the sealing ring. When the reciprocating screw rotates, the hook plate can pull the bevel plate to slide the reciprocating sliding ring to the end away from the sealing ring. During the sliding, the cleaning ring cleans the inner wall of the valve body. When one end of the hook plate enters the adjusting bevel groove, the hook plate is driven by the inclined surface of the adjusting bevel groove to rotate. The bevel plate is released, and the reciprocating sliding ring is quickly reset under the pull of the reset spring. During the reset, the cleaning ring quickly cleans the inner wall of the valve body, and the cleaning effect is better. Then the sliding sleeve is reset as the reciprocating screw rotates, so that the hook plate hooks the bevel plate. In this cyclic operation, the inner wall of the valve body can be continuously cleaned.

[0017] 3. The present invention rotatably installs the impeller in the impeller grooves provided on both sides of the butterfly plate, and allows a part of the impeller to extend out of the impeller groove. When the butterfly plate is rotated 90 degrees to open, the flowing liquid will impact the impeller exposed outside the impeller groove, so that the impeller drives the active bevel gear to rotate, and then the active bevel gear drives the reciprocating screw to rotate through the driven bevel gear. Through this arrangement, the liquid flowing through the valve body can provide the power required for cleaning, without the need for external power, thereby achieving an energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the structure of the butterfly plate of the present invention when it is closed; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4 It is a schematic diagram of the reciprocating screw structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the sliding sleeve of the present invention; Figure 6 It is a schematic diagram of the structure of the reciprocating slip ring of the present invention; Figure 7 Schematic diagram of the butterfly plate structure of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the butterfly plate of the present invention; Fig. 9 This is a schematic diagram of the cross-sectional structure of the butterfly plate of the present invention when it is opened; Fig.10 For the present invention Fig. 9 Enlarged structural diagram at B in the middle.

[0019] In the figure: 1. Valve body; 11. Sealing ring; 2. Rotating handle; 3. Valve stem; 4. Butterfly plate; 5. Cleaning ring; 51. Reciprocating sliding ring; 52. Driving slide groove; 53. Inclined plate; 54. Return spring; 6. Impeller; 61. Impeller groove; 62. Impeller shaft; 63. Transmission belt; 7. Active bevel gear; 71. Linkage cavity; 72. Driven bevel gear; 73. Transmission rod; 8. Reciprocating pulling mechanism; 81. Screw cavity; 82. Connecting slide hole; 83. Reciprocating screw; 84. Sleeve; 85. Mounting rod; 86. Guide block; 87. Connecting slide rod; 88. Torsion spring shaft; 89. Hook plate; 810. Adjusting inclined groove. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0021] like Figure 1-3 and Figure 8 As shown, the embodiment of the present invention discloses a butterfly valve with a self-cleaning function, including a valve body 1, a rotating handle 2, a valve stem 3 and a butterfly plate 4, and also includes a cleaning ring 5, the cleaning ring 5 coaxially slides inside the valve body 1, and the outer side of the cleaning ring 5 abuts against the inner wall of the valve body 1, a reciprocating pulling mechanism 8 is arranged in the side wall of the valve body 1, the reciprocating pulling mechanism is drivingly connected to the cleaning ring 5, an impeller 6 is rotatably installed on the side of the butterfly plate 4, an active bevel gear 7 is rotatably installed on the valve stem 3, and the active bevel gear 7 is drivingly connected to the impeller 6, when the butterfly plate 4 is rotated 90 degrees to open, the active bevel gear 8 7 is connected to the reciprocating pulling mechanism; the cleaning ring 5 is slidably installed in the valve body 1, and is connected to the impeller 6 on the opened butterfly plate 4 through the reciprocating pulling mechanism in the side wall of the valve body 1. When the butterfly plate 4 is opened, the liquid flowing through the valve body 1 will impact the impeller 6 to rotate. When the impeller 6 rotates, the reciprocating pulling mechanism is driven to operate. The reciprocating pulling mechanism drives the cleaning ring 5 to slide back and forth to clean the inner wall of the valve body 1. This arrangement enables the cleaning ring 5 to continue to reciprocate when liquid flows through the valve body 1, so as to clean the inner wall of the valve body 1 and ensure thorough cleaning.

[0022] like Figure 2 As shown, a sealing ring 11 is coaxially fixedly installed on the inner surface of the valve body 1. The sealing ring 11 is located in the middle position inside the valve body 1. The top and bottom ends of the valve stem 3 both penetrate the sealing ring 11. When the butterfly plate 4 is closed, the outer side of the butterfly plate 4 is tightly connected to the inner side of the sealing ring 11.

[0023] like Figure 2-3As shown, reciprocating sliding rings 51 are slidably installed on both sides of the sealing ring 11, and the reciprocating sliding ring 51 is connected to the sealing ring 11 through a reset spring 54. The inner diameter of the reciprocating sliding ring 51 is larger than the inner diameter of the sealing ring 11. A plurality of cleaning rings 5 ​​are coaxially fixedly installed on the outer side of the reciprocating sliding ring 51. Four driving sliding grooves 52 are opened on the inner surface of the valve body 1. The four driving sliding grooves 52 are respectively located on both sides of the sealing ring 11 and are symmetrically distributed in pairs. The driving sliding grooves 52 are parallel to the axis of the valve body 1. Inclined plates 53 are symmetrically fixedly installed on the outer sides of the two reciprocating sliding rings 51, and the inclined plates 53 slide in the corresponding driving sliding grooves 52.

[0024] like Figure 3-5 As shown, the reciprocating pulling mechanism 8 includes a screw chamber 81, which is opened in the side wall of the valve body 1, parallel to the driving slide groove 52, and connected to the driving slide groove 52 through a connecting slide hole 82. A reciprocating screw 83 is rotatably installed inside the screw chamber 81, and a sliding sleeve 84 is coaxially slidably installed on the outer surface of the reciprocating screw 83. A mounting rod 85 is fixedly installed on the inner surface of the sliding sleeve 84, and a guide block 86 is coaxially rotatably installed on the outer surface of the mounting rod 85. The guide block 86 slides in the screw groove of the reciprocating screw 83.

[0025] like Figure 3 As shown, a connecting slide rod 87 is fixedly installed on the outer surface of the sliding sleeve 84, one end of the connecting slide rod 87 passes through the connecting slide hole 82 and extends into the driving slide groove 52 and is hinged with a hook plate 89 through a torsion spring shaft 88. The side of the inclined plate 53 away from the sealing ring 11 and the side of the hook plate 89 close to the sealing ring 11 are both inclined surfaces, and an adjusting inclined groove 810 is provided at the end of the driving slide groove 52 away from the sealing ring 11; by providing a rotatable hook plate 89 and providing an adjusting inclined groove 810 at the end of the driving slide groove 52 away from the sealing ring 11, when the reciprocating screw 83 rotates, the inclined plate 53 can be pulled by the hook plate 89 to move the reciprocating screw 83 to the reciprocating screw 83. The reciprocating sliding ring 51 slides toward the end away from the sealing ring 11, and the cleaning ring 5 cleans the inner wall of the valve body 1 while sliding. When one end of the hook plate 89 enters the adjusting bevel groove 810, the hook plate 89 is driven by the inclined surface of the adjusting bevel groove 810 to rotate, and the bevel plate 53 is loosened. The reciprocating sliding ring 51 is quickly reset under the pull of the reset spring 54. While resetting, the cleaning ring 5 quickly cleans the inner wall of the valve body 1, and the cleaning effect is better. Then the sliding sleeve 84 is reset with the rotation of the reciprocating screw 83, so that the hook plate 89 hooks the bevel plate 53, and the inner wall of the valve body 1 can be continuously cleaned in this cyclic operation.

[0026] like Figure 3 As shown, a linkage cavity 71 is provided on the side of the valve stem 3 , and the linkage cavity 71 is coaxial with the valve stem 3 . One end of the reciprocating screw 83 extends into the linkage cavity 71 and is coaxially fixedly mounted with a driven bevel gear 72 .

[0027] like Figure 8As shown, the driving bevel gear 7 is rotatably mounted inside the valve stem 3 through a transmission rod 73 , and a portion of the driving bevel gear 7 extends into the linkage chamber 71 .

[0028] like Figure 7-8 As shown, both sides of the butterfly plate 4 are provided with impeller grooves 61, which do not penetrate the butterfly plate 4, and the impeller 6 rotates in the impeller groove 61 through the impeller shaft 62, and a part of the impeller 6 extends out of the impeller groove 61, and the impeller shaft 62 is connected to the transmission rod 73 through the transmission belt 63; by rotatably installing the impeller 6 in the impeller grooves 61 provided on both sides of the butterfly plate 4, and making a part of the impeller 6 extend out of the impeller groove 61, when the butterfly plate 4 is rotated ninety degrees to open, the flowing liquid will impact the impeller 6 exposed to the outside of the impeller groove 61, so that the impeller 6 drives the active bevel gear 7 to rotate, and then the active bevel gear 7 drives the reciprocating screw 83 to rotate through the driven bevel gear 72. Through this arrangement, the liquid flowing through the valve body 1 can provide the power required for cleaning, without the need for external power, thereby achieving an energy-saving effect.

[0029] Working principle: Connect the two ends of the valve body 1 to the fluid pipelines to be used. When the butterfly plate 4 of the valve body 1 is closed, the fluid stops flowing and the impeller 6 will not be impacted and rotated by the fluid. When the fluid needs to flow, the butterfly plate 4 is rotated by rotating the rotating handle 2. When the cleaning ring 5 needs to clean the inner wall of the valve body 1, the butterfly plate 4 is rotated ninety degrees to make the active bevel gear 7 and the driven bevel gear 72 mesh. The flowing liquid impacts the part of the impeller 6 exposed outside the impeller groove 61, driving the impeller 6 to rotate, and the impeller shaft 62 drives the transmission rod 73 to rotate through the transmission belt 63. The transmission rod 73 drives the active bevel gear 7 to rotate, and the active bevel gear 7 drives the reciprocating screw 83 to rotate through the driven bevel gear 72. The guide block 86 drives the sleeve 84 by sliding in the screw groove of the reciprocating screw 83. When the sleeve 84 moves away from the butterfly plate 4, the hook plate 89 pulls the reciprocating sliding ring 51 to slide through the inclined plate 53, and the cleaning ring 5 cleans the inner wall of the valve body 1. When one end of the hook plate 89 extends into the adjusting inclined groove 810, the hook plate 89 rotates under the action of the inclined surface of the adjusting inclined groove 810, loosens the inclined plate 53, and the reciprocating sliding ring 51 quickly resets under the action of the reset spring 54. Then the sleeve 84 resets under the rotation of the reciprocating screw 83, and the hook plate 89 pulls the inclined plate 53 again, so that the cycle runs. When it is necessary to stop cleaning the inner wall of the valve body 1 and to allow the fluid to continue to flow, it is only necessary to slightly rotate the butterfly plate 4 by rotating the handle 2 to make the active bevel gear 7 leave the driven bevel gear 72. The cleaning ring 5 is installed by sliding in the valve body 1 and passing through the inner wall of the valve body 1. The reciprocating pulling mechanism 8 is connected to the driving force of the impeller 6 on the opened butterfly plate 4. When the butterfly plate 4 is opened, the liquid flowing through the valve body 1 will impact the impeller 6 to rotate. When the impeller 6 rotates, the reciprocating pulling mechanism 8 is driven to operate. The reciprocating pulling mechanism 8 drives the cleaning ring 5 to slide back and forth to clean the inner wall of the valve body 1. This arrangement enables the cleaning ring 5 to continue to reciprocate when liquid flows through the valve body 1 to clean the inner wall of the valve body 1, thereby ensuring thorough cleaning. By providing a rotatable hook plate 89 and opening an adjusting inclined groove 810 at the end of the driving slide groove 52 away from the sealing ring 11, when the reciprocating screw 83 rotates, the hook plate 89 can be used to pull the inclined plate 53 to slide the reciprocating sliding ring 51 to the end away from the sealing ring 11. While sliding, the cleaning ring 5 presses against the valve body. 1. When one end of the hook plate 89 enters the adjusting slant groove 810, the hook plate 89 is driven by the inclined surface of the adjusting slant groove 810 to rotate, loosening the slant plate 53. The reciprocating sliding ring 51 is quickly reset under the pull of the reset spring 54. While resetting, the cleaning ring 5 will quickly clean the inner wall of the valve body 1, and the cleaning effect is better. Then, the sliding sleeve 84 is reset with the rotation of the reciprocating screw 83, so that the hook plate 89 hooks the slant plate 53. In this way, the inner wall of the valve body 1 can be continuously cleaned. By rotating the impeller 6 in the impeller groove 61 opened on both sides of the butterfly plate 4, and making a part of the impeller 6 extend to the outside of the impeller groove 61, when the butterfly plate 4 is rotated 90 degrees to open, the flowing liquid will impact the impeller 6 exposed to the outside of the impeller groove 61.The impeller 6 drives the active bevel gear 7 to rotate, and then the active bevel gear 7 drives the reciprocating screw 83 to rotate through the driven bevel gear 72. Through this arrangement, the liquid flowing through the valve body 1 can provide the power required for cleaning, without the need for external power, thus achieving an energy-saving effect.

[0030] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should be noted that in the description 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A butterfly valve with a self-cleaning function, comprising a valve body (1), a rotating handle (2), a valve stem (3) and a butterfly plate (4), characterized in that: The valve body (1) further comprises a cleaning ring (5), wherein the cleaning ring (5) coaxially slides inside the valve body (1), and the outer side of the cleaning ring (5) abuts against the inner wall of the valve body (1); a reciprocating pulling mechanism (8) is arranged inside the side wall of the valve body (1), and the reciprocating pulling mechanism is drivingly connected to the cleaning ring (5); an impeller (6) is rotatably mounted on the side of the butterfly plate (4); an active bevel gear (7) is rotatably mounted on the valve stem (3), and the active bevel gear (7) is drivingly connected to the impeller (6); when the butterfly plate (4) is rotated 90 degrees to open, the active bevel gear (7) is drivingly connected to the reciprocating pulling mechanism.

2. A butterfly valve with self-cleaning function according to claim 1, characterized in that: A sealing ring (11) is coaxially fixedly mounted on the inner surface of the valve body (1); the sealing ring (11) is located in the middle of the valve body (1); the top and bottom ends of the valve stem (3) are both arranged to penetrate the sealing ring (11); when the butterfly plate (4) is closed, the outer side of the butterfly plate (4) is tightly connected to the inner side of the sealing ring (11).

3. A butterfly valve with self-cleaning function according to claim 2, characterized in that: Reciprocating sliding rings (51) are slidably mounted on both sides of the sealing ring (11); the reciprocating sliding ring (51) and the sealing ring (11) are connected via a return spring (54); the inner diameter of the reciprocating sliding ring (51) is larger than the inner diameter of the sealing ring (11); a plurality of cleaning rings (5) are coaxially fixedly mounted on the outer side of the reciprocating sliding ring (51); four driving sliding grooves (52) are provided on the inner surface of the valve body (1); the four driving sliding grooves (52) are respectively located on both sides of the sealing ring (11) and are symmetrically distributed in pairs; the driving sliding grooves (52) are parallel to the axis of the valve body (1); inclined plates (53) are symmetrically fixedly mounted on the outer sides of the two reciprocating sliding rings (51); the inclined plates (53) slide in the corresponding driving sliding grooves (52).

4. A butterfly valve with self-cleaning function according to claim 3, characterized in that: The reciprocating pulling mechanism (8) comprises a screw cavity (81), wherein the screw cavity (81) is formed in a side wall of the valve body (1), the screw cavity (81) is parallel to the driving slide groove (52), the screw cavity (81) is connected to the driving slide groove (52) via a connecting slide hole (82), a reciprocating screw (83) is rotatably mounted inside the screw cavity (81), a sliding sleeve (84) is coaxially slidably mounted on the outer surface of the reciprocating screw (83), a mounting rod (85) is fixedly mounted on the inner surface of the sliding sleeve (84), a guide block (86) is coaxially rotatably mounted on the outer surface of the mounting rod (85), and the guide block (86) slides in the screw groove of the reciprocating screw (83).

5. A butterfly valve with self-cleaning function according to claim 4, characterized in that: A connecting slide rod (87) is fixedly mounted on the outer surface of the sliding sleeve (84), one end of the connecting slide rod (87) passes through the connecting slide hole (82) and extends into the driving slide groove (52) and is hinged to a hook plate (89) via a torsion spring shaft (88), a side of the inclined plate (53) away from the sealing ring (11) and a side of the hook plate (89) close to the sealing ring (11) are both inclined surfaces, and an adjusting inclined groove (810) is provided at one end of the driving slide groove (52) away from the sealing ring (11).

6. A butterfly valve with self-cleaning function according to claim 5, characterized in that: A linkage cavity (71) is provided on the side of the valve stem (3), the linkage cavity (71) being coaxial with the valve stem (3), one end of the reciprocating screw (83) extending into the linkage cavity (71) and being coaxially fixedly mounted with a driven bevel gear (72).

7. A butterfly valve with self-cleaning function according to claim 6, characterized in that: The active bevel gear (7) is rotatably mounted inside the valve stem (3) via a transmission rod (73), and a portion of the active bevel gear (7) extends into the linkage chamber (71).

8. The butterfly valve with self-cleaning function according to claim 7, characterized in that: Impeller grooves (61) are provided on both sides of the butterfly plate (4), the impeller grooves (61) do not penetrate the butterfly plate (4), the impeller (6) rotates in the impeller grooves (61) via an impeller shaft (62), a portion of the impeller (6) extends out of the impeller grooves (61), and the impeller shaft (62) is connected to the transmission rod (73) via a transmission belt (63).

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