A butterfly valve with a valve plate fixing mechanism

Abstract

The utility model provides a butterfly valve with a valve plate fixing mechanism, which relates to the technical field of butterfly valve equipment, and includes a valve body, a valve plate, a handle and a sleeve. A square valve stem is installed on the lower end face of the handle, and a rotating block is installed on the upper end face of the handle. A flat blade is provided on the upper end face of the rotating block. The output end of the rotating block passes through the handle and the square valve stem to a screw rod installed below. A fixing rod is installed on the bottom end face of the screw rod. A square groove is provided on the upper end face of the sleeve, and the square groove matches the square valve stem. The square valve stem is inserted in the square groove. When the butterfly valve is used, the mechanism can increase the friction between the sleeve and the valve plate, thereby avoiding wear on the contact part between the inside of the valve plate and the valve stem, causing looseness between the valve plate and the valve stem, thereby causing the problem of inaccurate opening and closing of the butterfly valve.

Description

Technical Field

[0001] The utility model belongs to the technical field of butterfly valve equipment, and more specifically, particularly relates to a butterfly valve with a valve plate fixing mechanism. Background Art

[0002] A butterfly valve is a valve that uses a circular butterfly plate as an opening and closing member and rotates with the valve stem to open, close and regulate the fluid channel. There are many types of butterfly valves and they are widely used. They are also the most common type of valves we see on pipelines in our daily lives. Butterfly valves have the characteristics of simple structure, small size, light weight, low material consumption, small installation size, fast switching, 90° reciprocating rotation and small driving torque. They are used to cut off, connect and regulate the flow of media in pipelines and have good fluid control characteristics and closing and sealing performance.

[0003] Based on the above, the inventors have discovered the following problems: as the number of times the butterfly valve is used increases, the contact area between the valve plate and the valve stem will wear out, and the valve plate and the valve stem may become loose during use, causing the butterfly valve to open and close inaccurately, affecting the normal operating performance and life of the butterfly valve, and causing pipeline leakage or other failures.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a butterfly valve with a valve plate fixing mechanism is provided, in order to achieve the purpose of having more practical value. Utility Model Content

[0005] The purpose and effect of the butterfly valve with a valve plate fixing mechanism of the utility model are achieved by the following specific technical means:

[0006] A butterfly valve with a valve plate fixing mechanism comprises a valve body, a valve plate, a handle and a sleeve, wherein a square valve stem is installed on the lower end face of the handle, a rotating block is installed on the upper end face of the handle, a flat edge is provided on the upper end face of the rotating block, an output end of the rotating block passes through the handle and the square valve stem to a screw rod installed below, a fixing rod is installed on the bottom end face of the screw rod, a square groove is provided on the upper end face of the sleeve, the square groove matches the square valve stem, and the square valve stem is inserted in the square groove.

[0007] Furthermore, a through hole is provided on the side wall of the sleeve, an extrusion block is provided inside the through hole, a connecting rod is installed on one side of the extrusion block through a hinge seat, a slider is connected to the end of the connecting rod through a hinge seat, the slider is sleeved on the screw rod, a thread is provided on the inner hole of the slider, and the slider and the screw rod form a threaded connection.

[0008] Furthermore, the outer wall of the extrusion block is covered with a rubber pad.

[0009] Furthermore, a limiting groove is provided on the side wall of the sleeve, and a limiting block is installed on the inner wall of the valve plate, and the limiting block matches the limiting groove.

[0010] Furthermore, a positioning block is installed at the bottom of the valve body, and the sleeve is inserted into the interior of the positioning block.

[0011] Furthermore, a sealing gasket is provided on the bottom of the sleeve.

[0012] Furthermore, a fixing block is provided inside the sleeve, and the fixing rod is inserted inside the fixing block.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] Through the coordinated use of the rotating block, screw, slider, connecting rod and extrusion block, when the butterfly valve is needed, the screw is driven to rotate by twisting the flat blade on the rotating block, and the slider connected to the screw thread begins to slide, and then the inclination angle of the connecting rod becomes smaller, driving the extrusion block to move outside the sleeve, so that the outer wall of the extrusion block contacts the inner wall of the valve plate. The rubber pad covering the outer wall of the extrusion block increases the friction generated when the extrusion block contacts the inner wall of the valve plate, thereby improving the friction between the sleeve and the valve plate during rotation, improving the accuracy of the valve plate when opening and closing, and making the operation convenient and quick.

[0015] By using the limit groove and the limit block in coordination, the sleeve will not move up and down when installed inside the valve plate, and can ensure that the butterfly valve will not rotate due to external force when it is in a stationary state, thereby enhancing the overall impact resistance of the butterfly valve and ensuring the stable operation of the pipeline.

[0016] By using the fixing rod and the fixing block in coordination, the valve stem will not shake when installed as a whole inside the sleeve, thereby improving the overall stability of the butterfly valve. A sealing gasket is provided at the bottom of the sleeve to improve the sealing of the valve body, effectively avoiding leakage problems that may occur during the use of the butterfly valve, thereby ensuring the reliability and safety of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a butterfly valve with a valve plate fixing mechanism of the utility model.

[0018] Figure 2 It is a three-dimensional schematic diagram of a butterfly valve stem with a valve plate fixing mechanism of the utility model.

[0019] Figure 3 It is a three-dimensional schematic diagram of a butterfly valve sleeve with a valve plate fixing mechanism of the utility model.

[0020] Figure 4The utility model is a schematic diagram of the planar structure of a butterfly valve with a valve plate fixing mechanism.

[0021] Figure 5 The utility model is a butterfly valve with a valve plate fixing mechanism Figure 4 An enlarged schematic diagram of point A in FIG.

[0022] Figure 6 The utility model is a butterfly valve with a valve plate fixing mechanism Figure 4 An enlarged schematic diagram of point B in FIG.

[0023] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0024] 1. Valve body; 2. Valve plate; 3. Handle; 4. Rotating block; 5. Slotted blade; 6. Square valve stem; 7. Screw; 8. Fixed rod; 9. Sleeve; 10. Square groove; 11. Through hole; 12. Extrusion block; 13. Limiting groove; 14. Sealing gasket; 15. Limiting block; 16. Connecting rod; 17. Slider; 18. Positioning block; 19. Fixed block. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0026] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship 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, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example:

[0029] As attached Figure 1 To Attachment Figure 6As shown:

[0030] The utility model provides a butterfly valve with a valve plate fixing mechanism, comprising a valve body 1, a valve plate 2, a handle 3 and a sleeve 9, the lower end surface of the handle 3 is installed with a square valve stem 6, the upper end surface of the handle 3 is installed with a rotating block 4, the upper end surface of the rotating block 4 is provided with a flat blade 5, the output end of the rotating block 4 passes through the handle 3 and the square valve stem 6 to the bottom where a screw 7 is installed, the bottom end surface of the screw 7 is installed with a fixing rod 8, the upper end surface of the sleeve 9 is provided with a square groove 10, the square groove 10 matches the square valve stem 6, and the square valve stem 6 is inserted in the square groove 10.

[0031] Among them, a through hole 11 is opened on the side wall of the sleeve 9, and an extrusion block 12 is arranged inside the through hole 11. A connecting rod 16 is installed on one side of the extrusion block 12 through a hinge seat, and a slider 17 is connected to the end of the connecting rod 16 through a hinge seat. The slider 17 is sleeved on the screw rod 7, and a thread is arranged on the inner hole of the slider 17. The slider 17 and the screw rod 7 form a threaded connection. Through the coordinated use of the rotating block 4, the screw rod 7, the slider 17, the connecting rod 16 and the extrusion block 12, when the butterfly valve needs to be used, the screw rod 7 is driven to rotate by twisting the straight-edge 5 on the rotating block 4, and the slider 17 threadedly connected to the screw rod 7 starts to slide, and then the inclination angle of the connecting rod 16 becomes smaller, driving the extrusion block 12 to move to the outside of the sleeve 9, so that the outer wall of the extrusion block 12 contacts the inner wall of the valve plate 2.

[0032] Among them, the outer wall of the extrusion block 12 is covered with a rubber pad. Through the design of the rubber pad, the friction force generated when the extrusion block 12 contacts the inner wall of the valve plate 2 becomes larger, thereby improving the accuracy of the valve plate 2 when opening and closing.

[0033] Among them, a limit groove 13 is opened on the side wall of the sleeve 9, and a limit block 15 is installed on the inner wall of the valve plate 2. The limit block 15 matches the limit groove 13. Through the design of the limit groove 13 and the limit block 15, the sleeve 9 will not move up and down when installed inside the valve plate 2, and it can be ensured that the butterfly valve will not rotate due to external force when it is in a static state, thereby enhancing the overall impact resistance of the butterfly valve and ensuring the stable operation of the pipeline.

[0034] A positioning block 18 is installed at the bottom of the valve body 1 , and the sleeve 9 is inserted into the positioning block 18 .

[0035] The bottom of the sleeve 9 is provided with a sealing gasket 14. The design of the sealing gasket 14 improves the sealing performance of the valve body 1, effectively avoiding leakage problems that may occur during the use of the butterfly valve, and ensuring the reliability and safety of the butterfly valve.

[0036] Among them, a fixing block 19 is provided inside the sleeve 9, and the fixing rod 8 is inserted into the fixing block 19. Through the design of the fixing block 19 and the fixing rod 8, the valve stem will not shake when it is installed inside the sleeve 9 as a whole, thereby improving the overall stability of the butterfly valve.

[0037] The specific usage and function of this embodiment are as follows:

[0038] First, check the integrity of the device and use it only after confirming that it is correct. When the butterfly valve needs to be used, the screw 7 is driven to rotate by twisting the flat blade 5 on the rotating block 4, and the slider 17 threadedly connected to the screw 7 begins to slide, and then the inclination angle of the connecting rod 16 becomes smaller, driving the extrusion block 12 to move outside the sleeve 9, so that the outer wall of the extrusion block 12 contacts the inner wall of the valve plate 2. At this time, the rotating block 4 is released and the handle 3 is turned, thereby driving the square valve stem 6 to rotate. The square valve stem 6 is inserted in the square groove 10. The above design prevents the valve stem and the sleeve 9 from rotating in the same direction, so that the square valve stem 6 drives the sleeve 9 to rotate. The outer wall of the extrusion block 12 is covered with a rubber pad. The design of the rubber pad increases the friction generated when the extrusion block 12 contacts the inner wall of the valve plate 2. Through the above design, the friction between the sleeve 9 and the valve plate 2 is improved during rotation, thereby improving the accuracy of the valve plate 2 during opening and closing, and the operation is convenient and quick. The limit groove 13 and the limit block 15 engage with each other, so that the sleeve 9 will not move up and down when installed inside the valve plate 2, and can ensure that the butterfly valve will not rotate due to external force when it is in a static state, thereby enhancing the overall impact resistance of the butterfly valve and ensuring the stable operation of the pipeline. The fixing rod 8 is inserted into the fixing block 19, so that the valve stem will not shake when it is installed inside the sleeve 9 as a whole, thereby improving the overall stability of the butterfly valve, and a sealing gasket 14 is provided on the bottom of the sleeve 9, thereby improving the sealing of the valve body 1, effectively avoiding the leakage problem that may occur during the use of the butterfly valve, and ensuring the reliability and safety of the butterfly valve.

[0039] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

Claims

1. A butterfly valve with a valve plate fixing mechanism, comprising a valve body (1), a valve plate (2), a handle (3) and a sleeve (9), characterized in that: A square valve stem (6) is installed on the lower end surface of the handle (3), a rotating block (4) is installed on the upper end surface of the handle (3), a flat blade (5) is provided on the upper end surface of the rotating block (4), the output end of the rotating block (4) passes through the handle (3) and the square valve stem (6) to a screw rod (7) installed below, a fixing rod (8) is installed on the bottom end surface of the screw rod (7), a square groove (10) is provided on the upper end surface of the sleeve (9), the square groove (10) matches the square valve stem (6), and the square valve stem (6) is inserted into the square groove (10).

2. A butterfly valve with a valve plate fixing mechanism as claimed in claim 1, characterized in that: The side wall of the sleeve (9) is provided with a through hole (11), an extrusion block (12) is provided inside the through hole (11), a connecting rod (16) is installed on one side of the extrusion block (12) through a hinge seat, the end of the connecting rod (16) is connected to a slider (17) through a hinge seat, the slider (17) is sleeved on the screw rod (7), a thread is provided on the inner hole of the slider (17), and the slider (17) and the screw rod (7) are threadedly connected.

3. A butterfly valve with a valve plate fixing mechanism as claimed in claim 2, characterized in that: The outer wall of the extrusion block (12) is covered with a rubber pad.

4. A butterfly valve with a valve plate fixing mechanism as claimed in claim 1, characterized in that: A limiting groove (13) is provided on the side wall of the sleeve (9), and a limiting block (15) is installed on the inner wall of the valve plate (2), wherein the limiting block (15) matches the limiting groove (13).

5. A butterfly valve with a valve plate fixing mechanism as claimed in claim 1, characterized in that: A positioning block (18) is installed at the bottom of the valve body (1), and the sleeve (9) is inserted into the interior of the positioning block (18).

6. A butterfly valve with a valve plate fixing mechanism as claimed in claim 1, characterized in that: The bottom of the sleeve (9) is sleeved with a sealing gasket (14).

7. A butterfly valve with a valve plate fixing mechanism as claimed in claim 1, characterized in that: A fixing block (19) is provided inside the sleeve (9), and the fixing rod (8) is inserted into the fixing block (19).

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