Shockproof butterfly valve

Abstract

A shockproof butterfly valve comprises a valve body, a valve rod and a valve plate, a valve cavity is formed in the valve body, a valve seat is arranged in the valve cavity, the valve rod extends into the valve cavity from the upper end of the valve body, the bottom end of the valve rod is connected with the valve plate, and the back face of the valve plate is connected with the valve rod through a fixing bolt. The edge of the front face of the valve plate is backwards provided with a shockproof groove, a shockproof spring is arranged in the shockproof groove, the front face of the valve plate on the inner side of the shockproof groove is provided with a shockproof block installation groove, a shockproof block is arranged in the shockproof block installation groove and fixed to the bottom face of the shockproof block installation groove through bolts, the outer end of the shockproof block covers the front end of the shockproof groove, and the shockproof block is provided with a shockproof pin corresponding to the shockproof groove. One end of the shockproof spring is fixed with the bottom surface of the shockproof groove, and the other end of the shockproof spring is propped against the back surface of the shockproof block.

Description

Technical Field

[0001] The utility model relates to the technical field of valve structures, in particular to a shock-proof butterfly valve. 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 switching control of low-pressure pipeline media. A butterfly valve refers to a valve in which the closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing.

[0003] When the existing large butterfly valve is closed, the valve plate and the valve seat generate impact vibration. Although there is a sealing ring between the valve plate and the valve seat, the shock absorption effect of the sealing ring is better than nothing. Therefore, under long-term switching work, the vibration of the valve plate is likely to cause the connection between the valve plate and the valve stem to loosen, and the service life of the valve is greatly reduced. Summary of the invention

[0004] In order to solve the above problems, the utility model provides the following solutions:

[0005] A shockproof butterfly valve comprises a valve body, a valve stem and a valve plate, wherein a valve cavity is defined in the valve body, a valve seat is arranged in the valve cavity, the valve stem extends into the valve cavity from the upper end of the valve body, the bottom end of the valve stem is connected to the valve plate, and the back side of the valve plate is connected to the valve stem by fixing bolts; a shockproof groove is defined backwards on the front edge of the valve plate, a shockproof spring is arranged in the shockproof groove, a shockproof block mounting groove is defined on the front side of the valve plate inside the shockproof groove, the shockproof block is arranged in the shockproof block mounting groove, the shockproof block is fixed to the bottom surface of the shockproof block mounting groove by bolts, the outer end of the shockproof block covers the front end of the shockproof groove, a shockproof pin is arranged on the shockproof block corresponding to the shockproof groove, the shockproof pin is inserted into the shockproof spring, one end of the shockproof spring is fixed to the bottom surface of the shockproof groove, and the other end is against the back side of the shockproof block.

[0006] Furthermore, a valve plate sealing ring is sleeved on the outer end of the valve plate, and the sealing ring wraps the outer side of the shockproof block and the anti-vibration groove.

[0007] Furthermore, a valve seat sealing ring is arranged on the side of the valve seat facing the valve plate, and the valve plate sealing ring abuts against the valve seat sealing ring when the valve plate is closed.

[0008] Furthermore, the outer side of the shockproof block and the corresponding side surface of the valve seat sealing ring are inclined surfaces.

[0009] Furthermore, a handle is connected to the top end of the valve stem.

[0010] Furthermore, the top end of the valve stem is connected to the handle through a gear box.

[0011] The beneficial effects of the utility model are:

[0012] An anti-vibration structure consisting of an anti-vibration groove and an anti-vibration block is arranged on the valve plate to effectively reduce the impact vibration generated between the valve plate and the valve seat when the valve is closed. It cooperates with the external sealing ring to prevent the medium from entering the anti-vibration structure, effectively extending the service life of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the valve plate connection.

[0015] 1. Valve body; 2. Valve chamber; 3. Valve seat; 4. Valve stem; 5. Gear box; 6. Handle; 7. Valve plate; 8. Shockproof block; 9. Bolt; 10. Shockproof spring; 11. Valve plate sealing ring; 12. Valve seat sealing ring; 13. Fixing bolt. DETAILED DESCRIPTION

[0016] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0017] Example 1: Figure 1-Figure 2 As shown,

[0018] A shockproof butterfly valve comprises a valve body 1, a valve stem 4 and a valve plate 7, wherein a valve cavity 2 is provided in the valve body 1, a valve seat 3 is arranged in the valve cavity 2, the valve stem 4 extends into the valve cavity 2 from the upper end of the valve body 1, the bottom end of the valve stem 4 is connected to the valve plate 7, and the back side of the valve plate 7 is connected to the valve stem 4 by a fixing bolt 13; a shockproof groove is provided backward at the front edge of the valve plate 7, a shockproof spring 10 is arranged in the shockproof groove, a shockproof block mounting groove is provided at the front side of the valve plate inside the shockproof groove, a shockproof block 8 is arranged in the shockproof block mounting groove, the shockproof block 8 is fixed to the bottom surface of the shockproof block mounting groove by bolts 9, the outer end of the shockproof block 8 covers the front end of the shockproof groove, a shockproof pin is arranged corresponding to the shockproof groove of the shockproof block 8, the shockproof pin is inserted into the shockproof spring 10, one end of the shockproof spring 10 is fixed to the bottom surface of the shockproof groove, and the other end is against the back side of the shockproof block 8.

[0019] The outer end of the valve plate 7 is sleeved with a valve plate sealing ring 11, which wraps the outer side of the shockproof block 8 and the anti-vibration groove. The valve seat 3 is provided with a valve seat sealing ring 12 on the side facing the valve plate 7. When the valve plate 7 is closed, the valve plate sealing ring 11 and the valve seat sealing ring 12 abut against each other. The outer side of the shockproof block 8 and the corresponding side of the valve seat sealing ring 12 are inclined surfaces. The top end of the valve stem 4 is connected to the handle 6 through the gear box 5.

[0020] The utility model provides a shockproof structure composed of a shockproof groove and a shockproof block 8 on the valve plate 7, which effectively reduces the impact vibration generated between the valve plate 7 and the valve seat 3 when the valve is closed, and cooperates with the external sealing ring to prevent the medium from entering the shockproof structure, thereby effectively extending the service life of the valve.

[0021] Finally, it should be noted that the above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art from the present invention should be considered as the protection scope of the present invention.

Claims

1. A shockproof butterfly valve, comprising a valve body, a valve stem and a valve plate, wherein a valve cavity is provided in the valve body, a valve seat is provided in the valve cavity, the valve stem extends from the upper end of the valve body into the valve cavity, and the bottom end of the valve stem is connected to the valve plate, characterized in that: The back of the valve plate is connected to the valve stem by fixing bolts; a shock-proof groove is provided backwards at the front edge of the valve plate, a shock-proof spring is arranged in the shock-proof groove, a shock-proof block installation groove is provided on the front side of the valve plate inside the shock-proof groove, the shock-proof block is arranged in the shock-proof block installation groove, the shock-proof block and the bottom surface of the shock-proof block installation groove are fixed by bolts, the outer end of the shock-proof block covers the front end of the shock-proof groove, a shock-proof pin is arranged on the shock-proof block corresponding to the shock-proof groove, the shock-proof pin is inserted into the shock-proof spring, one end of the shock-proof spring is fixed to the bottom surface of the shock-proof groove, and the other end is against the back of the shock-proof block.

2. A shockproof butterfly valve as claimed in claim 1, characterized in that: The outer end of the valve plate is sleeved with a valve plate sealing ring, which wraps the outer side of the shockproof block and the anti-vibration groove.

3. A shockproof butterfly valve as claimed in claim 2, characterized in that: A valve seat sealing ring is arranged on the side of the valve seat facing the valve plate. When the valve plate is closed, the valve plate sealing ring abuts against the valve seat sealing ring.

4. A shockproof butterfly valve as claimed in claim 3, characterized in that: The outer side of the shockproof block and the corresponding side of the valve seat sealing ring are inclined surfaces.

5. A shockproof butterfly valve as claimed in claim 1, characterized in that: The top end of the valve stem is connected with a handle.

6. A shockproof butterfly valve as claimed in claim 5, characterized in that: The top end of the valve stem is connected to the handle through a gear box.

Images