Butterfly valve with buffering function

Abstract

The utility model discloses a butterfly valve with a buffering function, which comprises a valve body, a butterfly plate is rotatably connected in the valve body, the top of the butterfly plate is fixedly connected with a shaft rod, the shaft rod penetrates through the valve body and then is fixedly connected with a worm wheel, the top of the valve body is rotatably connected with a worm, the worm is meshed with the worm wheel, and the worm wheel is fixedly connected with the worm rod. According to the butterfly valve, the valve body is installed on a pipeline, then the worm is rotated to drive the worm gear to rotate, the worm gear drives the butterfly plate to rotate, and therefore opening or closing of the valve body can be achieved; after the valve body is installed, if a pipeline has strong water flow impact and impacts on the butterfly plate, the water flow firstly abuts against the buffer plate, the buffer plate is stressed to compress the first spring, and meanwhile the buffer plate compresses the buffer assembly while compressing the first spring, so that a series of buffering is completed; and water flow is prevented from directly impacting the butterfly plate to influence the butterfly plate.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a butterfly valve with a buffer function. Background Art

[0002] A butterfly valve, also called a flap valve, is a simple regulating valve that can be used to switch low-pressure pipeline media. A butterfly valve is a valve that has a disc as the closing part and rotates around the valve axis to open and close. It mainly serves as a cut-off and throttling function on pipelines.

[0003] In the prior art, a Chinese patent with announcement number: CN 208364812 U discloses an easy-to-place butterfly valve, including a butterfly valve, a frame plate of which the side is folded outward to form a ring plate, a groove is cut at a position corresponding to the center axis of the butterfly valve, the frame plate is integrally connected to a fixed block at a position in the middle of the groove, a counterweight block is integrally connected to the bottom of the fixed block, a circular groove is provided in the middle of the upper side surface of the fixed block, a bearing is embedded in the circular groove, and the lower end of the shaft of the butterfly valve passes through the through hole of the frame plate and is fixedly inserted into the inner ring of the bearing.

[0004] The butterfly valve in this patent, like most butterfly valves in the prior art, does not have a buffering function. Therefore, after the butterfly valve is installed, if the pipeline is opened and there is a strong impact of water flow, the water flow will directly impact the butterfly plate in the butterfly valve, thereby affecting the butterfly plate in the butterfly valve, causing it to deviate and shake, or reducing its life. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a butterfly valve with buffering function and the function of protecting the butterfly plate.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a butterfly valve with a buffering function, comprising a valve body, a butterfly plate rotatably connected in the valve body, a shaft rod fixedly connected to the top of the butterfly plate, the shaft rod passes through the valve body and is fixedly connected to a worm gear, the top of the valve body is rotatably connected to a worm, the worm gear is meshed with the worm gear, buffer plates are provided on both sides of the butterfly plate, a first spring is connected between the buffer plate and the butterfly plate, a rubber sheet is also fixedly connected to the edge of the buffer plate, the rubber sheet is fixedly connected to the butterfly plate, and a buffer assembly is also provided in the butterfly plate.

[0007] By adopting the above technical solution, the valve body is installed on the pipeline, and then the worm gear is driven to rotate by rotating the worm, and the butterfly plate is driven to rotate by the worm gear, so that the valve body can be opened or closed; after the valve body is installed, if there is a strong water flow impact on the pipeline and the impact is on the butterfly plate, the water flow will first hit the buffer plate, and the buffer plate will compress the first spring under the force, and at the same time, the buffer plate will compress the buffer assembly while compressing the first spring, thereby completing a series of buffering to prevent the water flow from directly impacting the butterfly plate and affecting the butterfly plate.

[0008] The utility model is further configured as follows: a plurality of through holes are provided in the butterfly plate, the buffer assembly comprises a sliding rod arranged in the through hole, a second spring sleeved on the outside of the sliding rod and an inclined block fixedly connected to the outside of the sliding rod, a fixing ring is fixedly connected in the through hole, and one end of the second spring is fixedly connected to the fixing ring.

[0009] By adopting the above technical solution, the buffer plate is subjected to force to compress the first spring. At the same time, when the buffer plate compresses the first spring, it will resist the inclined block, allowing the inclined block to compress the second spring. The sliding rod drives it to slide outward, so it will drive the resistance column to resist the inner wall of the valve body, thereby preventing the water flow from directly impacting the butterfly plate and affecting the butterfly plate.

[0010] The utility model is further configured as follows: the edge of the buffer plate is an arc-shaped structure and abuts against the outside of the inclined block.

[0011] By adopting the above technical solution and designing the arc structure, it is convenient to resist the inclined block and allow the inclined block to slide.

[0012] The utility model is further configured as follows: a fixing cylinder is fixedly connected to the top of the sliding rod, a resisting column is arranged in the fixing cylinder, and a third spring is connected between the resisting column and the fixing cylinder.

[0013] By adopting the above technical solution and setting the third spring, it is convenient to compress the third spring through the inner wall of the valve body through the resistance column, so as to avoid the water flow directly impacting the butterfly plate and affecting the butterfly plate.

[0014] The utility model is further configured as follows: the diameter of the buffer plate is less than or equal to the diameter of the butterfly plate.

[0015] By adopting the above technical solution, it is convenient to protect the butterfly plate.

[0016] The utility model is further configured as follows: the thickness of the buffer plate is ten millimeters to twenty millimeters.

[0017] By adopting the above technical solution, production is convenient and weight can be reduced.

[0018] The utility model is further configured as follows: a hand wheel is fixedly connected to the outside of the worm.

[0019] By adopting the above technical solution, it is convenient to rotate the worm.

[0020] The beneficial effects of the utility model are as follows: compared with the prior art, in the utility model, the valve body is installed on the pipeline, and then the worm gear is driven to rotate by rotating the worm, and the butterfly plate is driven to rotate by the worm gear, so that the valve body can be opened or closed; after the valve body is installed, if the pipeline has a strong water flow impact and the impact is on the butterfly plate, the water flow will first hit the buffer plate, and the buffer plate will be forced to compress the first spring, and at the same time, the buffer plate will compress the buffer assembly while compressing the first spring, thereby completing a series of buffering and avoiding the water flow from directly impacting the butterfly plate and affecting the butterfly plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the axonometric structure of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the worm and the worm wheel in the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the butterfly plate in the utility model;

[0025] Figure 5 It is a schematic diagram of the cross-sectional structure of the butterfly plate in the utility model;

[0026] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of the A area in the middle;

[0027] Figure 7 It is a structural schematic diagram of the first spring outside the butterfly plate of the utility model;

[0028] Figure 8 It is a structural schematic diagram of the buffer component in the utility model.

[0029] In the figure: 1. valve body; 2. worm; 3. butterfly plate; 4. worm wheel; 5. buffer plate; 6. first spring; 7. rubber sheet; 8. through hole; 9. slide rod; 10. inclined block; 11. second spring; 12. fixing ring; 13. fixing cylinder; 14. third spring; 15. resistance column. DETAILED DESCRIPTION

[0030] 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.

[0031] Example: As shown in the attached Figures 1 to 8 A butterfly valve with a buffering function is shown, comprising a valve body 1, a butterfly plate 3 is rotatably connected inside the valve body 1, the top of the butterfly plate 3 is fixedly connected to a shaft rod, the shaft rod penetrates the valve body 1 and is fixedly connected to a worm gear 4, the top of the valve body 1 is rotatably connected to a worm 2, the worm 2 is meshed with the worm gear 4, the outside of the worm 2 is fixedly connected to a hand wheel, so the worm 2 can be turned to drive the worm gear 4 to rotate, and the worm gear 4 can drive the butterfly plate 3 to rotate, so that the butterfly plate 3 can be opened or closed, and buffer plates 5 are provided on both sides of the butterfly plate 3, the diameter of the buffer plate 5 is less than or equal to the diameter of the butterfly plate 3, the diameter of the buffer plate 5 in this embodiment is slightly smaller than the butterfly plate 3, and the thickness of the buffer plate 5 is ten to twenty millimeters, preferably fifteen millimeters, and a first spring 6 is connected between the buffer plate 5 and the butterfly plate 3, The edge of the buffer plate 5 is also fixedly connected with a rubber sheet 7, which is fixedly connected to the butterfly plate 3. A buffer component is also provided in the butterfly plate 3. Buffering can also be achieved by the setting of the rubber sheet 7. Among them, a plurality of through holes 8 are also provided in the butterfly plate 3. The buffer component includes a slide rod 9 arranged in the through hole 8, a second spring 11 sleeved on the outside of the slide rod 9, and an inclined block 10 fixedly connected to the outside of the slide rod 9. A fixing ring 12 is fixedly connected in the through hole 8, and one end of the second spring 11 is fixedly connected to the fixing ring 12. A fixing tube 13 is also fixedly connected to the top of the slide rod 9. A resistance column 15 is provided in the fixing tube 13, and a third spring 14 is connected between the resistance column 15 and the fixing tube 13. In order to facilitate the resistance, the edge of the buffer plate 5 is an arc structure, and it resists the outside of the inclined block 10.

[0032] The above technical solution is explained as follows: if there is a strong water flow impact on the pipeline and it impacts the butterfly plate 3, the water flow will first hit the buffer plate 5, and the buffer plate 5 will compress the spring under force. At the same time, the buffer plate 5 compresses the first spring 6, so it will resist the inclined block 10, so that the inclined block 10 compresses the second spring 11, and the slide rod 9 drives it to slide outward, so it will drive the resistance column 15 to resist the inner wall of the valve body 1, so that the resistance column 15 compresses the third spring 14, thereby completing a series of buffering.

[0033] In order for those skilled in the art to fully understand the technical solution, this embodiment is summarized as follows:

[0034] When in use, the valve body 1 is installed on the pipeline, and then the worm gear 4 is driven to rotate by rotating the worm screw 2, and the butterfly plate 3 is driven to rotate by the worm gear 4, so that the valve body 1 can be opened or closed; after the valve body 1 is installed, if there is a strong water flow impact on the pipeline and the impact is on the butterfly plate 3, the water flow will first hit the buffer plate 5, and the buffer plate 5 is forced to compress the first spring 6. At the same time, when the buffer plate 5 compresses the first spring 6, it will hit the inclined block 10, so that the inclined block 10 compresses the second spring 11, and the slide rod 9 drives it to slide outward, so it will drive the resistance column 15 to hit the inner wall of the valve body 1, so that the resistance column 15 compresses the third spring 14, thereby completing a series of buffering to prevent the water flow from directly impacting the butterfly plate 3 and affecting the butterfly plate 3.

[0035] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.

Claims

1. A butterfly valve with a buffering function, comprising a valve body (1), a butterfly plate (3) rotatably connected inside the valve body (1), a shaft fixedly connected to the top of the butterfly plate (3), the shaft passing through the valve body (1) and then fixedly connected to a worm gear (4), a worm (2) rotatably connected to the top of the valve body (1), the worm (2) meshing with the worm gear (4), characterized in that: Buffer plates (5) are provided on both sides of the butterfly plate (3); a first spring (6) is connected between the buffer plate (5) and the butterfly plate (3); a rubber sheet (7) is fixedly connected to the edge of the buffer plate (5); the rubber sheet (7) is fixedly connected to the butterfly plate (3); and a buffer component is also provided in the butterfly plate (3).

2. A butterfly valve with buffering function according to claim 1, characterized in that: The butterfly plate (3) is provided with a plurality of through holes (8), the buffer assembly comprises a slide rod (9) arranged in the through hole (8), a second spring (11) sleeved on the outside of the slide rod (9), and an inclined block (10) fixedly connected to the outside of the slide rod (9), a fixing ring (12) is fixedly connected in the through hole (8), and one end of the second spring (11) is fixedly connected to the fixing ring (12).

3. A butterfly valve with buffering function according to claim 2, characterized in that: The edge of the buffer plate (5) is an arc-shaped structure and contacts the outside of the inclined block (10).

4. A butterfly valve with buffering function according to claim 3, characterized in that: The top of the sliding rod (9) is also fixedly connected to a fixing cylinder (13), a resisting column (15) is arranged inside the fixing cylinder (13), and a third spring (14) is connected between the resisting column (15) and the fixing cylinder (13).

5. A butterfly valve with buffering function according to claim 4, characterized in that: The diameter of the buffer plate (5) is smaller than or equal to the diameter of the butterfly plate (3).

6. A butterfly valve with buffering function according to claim 5, characterized in that: The buffer plate (5) has a thickness of ten millimeters to twenty millimeters.

7. A butterfly valve with buffering function according to claim 6, characterized in that: A hand wheel is fixedly connected to the outside of the worm (2).

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