Quick-release butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a quick-release butterfly valve which comprises a valve body, a valve rod installed in the valve body, a control device for controlling the valve rod to rotate and a flange connected between the valve body and the control device, a fixing ring is in threaded connection with the outer ring of the top end of the valve rod, and a penetrating groove is formed in the surface of the fixing ring. A clamping ring is installed at a flange opening in the top of the valve body, two protruding blocks are fixed to the top face of the clamping ring, vertical plates on the top faces of the two protruding blocks are clamped in the penetrating grooves, and grooves are formed in the outer side surfaces of the two vertical plates. The valve has the advantages that the vertical plate and the protruding block on the clamping ring are arranged in the penetrating groove in a penetrating mode, the vertical plate penetrates through the penetrating groove, then the inner ring of the fixing ring is connected to the outer ring of the valve rod in a threaded mode, and therefore the clamping ring is effectively fixed, a vice is not needed in the disassembling process, and due to the fact that the clamping ring is clamped in the penetrating groove, the clamping ring is pinched and drawn close by hands through the groove in the vertical plate, and disassembling is convenient. And then the retainer ring can be taken out only by rotating the fixing ring, so that the disassembly is convenient.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valves, specifically a quick-release butterfly valve. Background Technology

[0002] A butterfly valve is an ordinary butterfly valve with an added "quick-release" function. It is usually used in pipeline systems that require frequent maintenance, cleaning, or replacement. The butterfly valve outputs torque by driving the internal shaft through the manual handle or worm gear mechanism on the control device. The lower end of the shaft is connected to the valve stem, which transmits the torque to the valve stem. The valve stem is inserted into the disc, which drives the disc to rotate 90° around the central axis of the valve body, thereby opening or closing the fluid passage. The valve seat plays a sealing role, ensuring that the disc completely blocks the fluid when closed. The valve stem and valve body are locked together by a retaining ring to prevent them from falling off.

[0003] However, in the existing technology, due to the elasticity of the retaining ring, the outer ring of the C-shaped retaining ring is tightly fitted to the inner wall of the circular groove, thereby fixing the disc on the valve stem. When disassembling, pliers need to be used to reach into the circular groove, clamp the protrusion on the retaining ring and bring it together to remove the retaining ring valve stem. Utility Model Content

[0004] The purpose of this invention is to provide a quick-release butterfly valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: it includes a valve body, a valve stem installed inside, a control device for controlling the rotation of the valve stem, and a flange connection between the valve body and the control device. A fixing ring is screwed onto the outer ring of the top of the valve stem, and a through groove is opened on the surface of the fixing ring. A retaining ring is installed at the flange opening at the top of the valve body. Two sets of protrusions are fixed on the top surface of the retaining ring. The upright plates on the top surfaces of the two sets of protrusions are stuck in the through groove, and grooves are opened on the outer surfaces of the two sets of upright plates.

[0006] Preferably, both the top end of the valve body and the bottom end of the control device are fixed with flanges, and the flanges are installed by bolts, with the retaining ring and retaining ring located in the circular groove opened in the flange.

[0007] Preferably, a ring is fixed on the outer surface of the valve stem, the ring is located in a circular groove opened in the flange, and the upper surface of the ring and the lower surface of the retaining ring are in contact.

[0008] Preferably, the fixing ring has a circular ring structure, the through groove has an arc-shaped structure with an angle of less than 90°, and the width of the through groove is greater than the width of the vertical plate.

[0009] Preferably, the retaining ring has a circular ring structure, and the retaining ring has a ring cut off at less than 90°. The retaining ring has a "C" shaped structure with a small opening, and the arc length of the notch of the retaining ring is equal to the arc length of the groove. When the valve stem is installed in the valve body, the outer ring of the retaining ring and the inner wall of the circular groove are tightly fitted. The retaining ring is made of elastic material. The retaining ring and two sets of protrusions are integrally formed. The two sets of protrusions are respectively fixed on the "C" shaped end of the retaining ring, and the upright plate fixed on the protrusion passes through the groove.

[0010] Preferably, the upper surface of the retaining ring and the lower surface of the fixing ring are in contact.

[0011] Preferably, the groove has an arc-shaped structure and is located above the fixing ring.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The quick-release butterfly valve proposed in this utility model, due to the elasticity of the retaining ring, allows the outer ring of the C-shaped retaining ring to tightly fit the inner wall of the circular groove, thereby fixing the disc on the valve stem. However, during disassembly, pliers are required to be inserted into the circular groove to clamp and bring the protrusion on the retaining ring together, thus removing the retaining ring from the valve stem. The upright plate and protrusion on the retaining ring are then inserted into the through groove, with the upright plate passing through the through groove. Then, the inner ring of the fixing ring is screwed onto the outer ring of the valve stem, thereby effectively fixing the retaining ring. Furthermore, during disassembly, pliers are not required. Since the retaining ring is clamped in the through groove, the groove on the upright plate allows it to be pinched and brought together by hand. Then, simply rotating the fixing ring is sufficient to pull the retaining ring out, facilitating disassembly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This utility model Figure 1 A schematic diagram of the exploded structure;

[0016] Figure 3 This is a schematic diagram of the connection between the control device and the valve body of this utility model;

[0017] Figure 4 This utility model Figure 3 A top-view structural diagram;

[0018] Figure 5 This utility model Figure 4 Schematic diagram of the cross-sectional structure along the middle AA direction;

[0019] Figure 6 This is a schematic diagram of the fixing ring and retaining ring structure of this utility model;

[0020] Figure 7 This is a schematic diagram of the fixing ring structure of this utility model;

[0021] Figure 8 This is a schematic diagram of the retaining ring structure of this utility model.

[0022] In the diagram: 1. Valve body; 2. Butterfly plate; 3. Valve seat; 4. Valve stem; 5. Control device; 6. Retaining ring; 7. Snap ring; 8. Protrusion; 9. Vertical plate; 10. Groove; 11. Through groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Example 1

[0025] Please see Figures 1-8 This utility model provides a technical solution: a quick-release butterfly valve, including a valve body 1, a valve stem 4 installed inside, a control device 5 for controlling the rotation of the valve stem 4, and a flange connection between the valve body 1 and the control device 5. The top end of the valve body 1 and the bottom end of the control device 5 are both fixed with flanges, and the flanges are installed by bolts.

[0026] Specifically, the control device 5 (usually a manual handle or worm gear mechanism) is installed on the flange at the top of the valve body and is fastened to the valve body through the flange connection. The control device 5 has a rotating shaft, a limit plate, and a positioning structure inside. The operator drives the rotating shaft inside the control device 5 to output torque by rotating the handle or turning the worm gear. The lower end of the rotating shaft is connected to the valve stem 4, which transmits the torque to the valve stem 4. The valve stem 4 passes through the sealing hole at the top of the valve body and is connected to the butterfly plate 2 located inside the valve body through the lower end. When the valve stem 4 rotates, it drives the butterfly plate 2 to rotate around the central axis of the valve body, thereby opening or closing the fluid passage. The edge of the disc of the butterfly plate 2 fits against the sealing ring of the valve seat 3 embedded on the inner wall of the valve body. The valve seat 3 plays a sealing role, ensuring that the butterfly plate 2 completely blocks the fluid when closed and disengages from the valve seat 3 when open, forming a smooth passage. The entire valve body 1, as the main body of the fluid passage, bears the medium pressure and ensures continuous flow. The butterfly valve adopts the flanged worm gear butterfly valve DN40, 1.6MPa (rubber seal) model.

[0027] Example 2

[0028] Based on Embodiment 1, to achieve quick disassembly of the retaining ring, a fixing ring 6 is screwed onto the outer ring of the top of the valve stem 4. The surface of the fixing ring 6 has a through groove 11. A retaining ring 7 is installed at the top flange of the valve body 1. Both the fixing ring 6 and the retaining ring 7 are located within a circular groove in the flange. A circular ring is fixed to the outer surface of the valve stem 4, located within the circular groove in the flange, with its upper surface fitting against the lower surface of the retaining ring 7. The fixing ring 6 has a circular ring structure, and the through groove 11 has an arc-shaped structure with an angle less than 90°. The width of the through groove 11 is greater than the width of the vertical plate 9. Two sets of protrusions 8 are fixed to the top surface of the retaining ring 7, and the vertical plate 9 on the top surface of the two sets of protrusions 8 is engaged within the through groove 11. The upper surface of the retaining ring 7 fits against the lower surface of the fixing ring 6. Figure 1 As shown, the retaining ring 7 has a circular structure, and the retaining ring 7 has a ring cut off at less than 90°. The retaining ring 7 has a "C" shaped structure with a small opening, and the arc length of the notch of the retaining ring 7 is equal to the arc length of the groove of the through groove 11. When the valve stem 4 is installed in the valve body 1, the outer ring of the retaining ring 7 and the inner wall of the circular groove are tightly fitted. The retaining ring 7 is made of elastic material. The retaining ring 7 and two sets of protrusions 8 are integrally formed. The two sets of protrusions 8 are respectively fixed on the "C" shaped end of the retaining ring 7. The upright plate 9 fixed on the protrusion 8 passes through the through groove 11. The outer surface of the two sets of upright plates 9 is provided with a groove 10. The groove 10 has an arc-shaped structure and is located above the fixing ring 6.

[0029] Specifically, the ring fixed to the outer surface of the valve stem 4 is first embedded in the circular groove inside the top flange of the valve body 1, serving as a positioning and limiting element for the valve stem 4. Then, the C-shaped retaining ring 7 is fitted into the circular groove of the flange, so that its outer ring fits tightly against the inner wall of the circular groove due to elasticity. At the same time, the lower surface of the retaining ring 7 fits against the upper surface of the valve stem 4 ring, forming an axial anti-reverse mechanism. The top plates 9 of the integrally formed protrusions 8 at both ends of the retaining ring 7 are inserted into the less than 90° annular arc-shaped through grooves 11 opened on the surface of the fixing ring 6. The valve stem 4 is fixed within the valve body 1 by means of the vertical plate 9, which limits and secures it within the groove. The operator screws the inner ring of the retaining ring 6 onto the external thread at the top of the valve stem 4, so that the lower surface of the retaining ring 6 fits against the upper surface of the retaining ring 7, forming a tight locking mechanism for the retaining ring 7. When the valve is working normally, the retaining ring 7 is locked in place by the vertical plate 9 and the retaining ring 6, preventing the retaining ring 7 from loosening and falling off, and ensuring that the valve stem 4 is reliably fixed within the valve body 1. When disassembly is required, the operator does not need to use tools; they only need to pinch the arc-shaped groove 10 on the outer side of the vertical plate 9 and refer to... Figure 8 The groove 10 is ergonomically designed. Simply pinch the recessed part of the groove 10 and bring the two sets of upright plates 9 together to close the notch of the retaining ring 7 and retract it. Then, rotate the fixing ring 6 to release the retaining ring 7 from the groove, and remove the valve stem 4 together. This allows for quick disassembly of the valve stem 4 and the internal butterfly plate 2 for subsequent maintenance and cleaning.

[0030] In use, the ring fixed on the outer surface of the valve stem 4 is first embedded into the circular groove in the top flange of the valve body 1, serving as a positioning and limiting element for the valve stem 4. Then, the C-shaped retaining ring 7 is fitted into the circular groove of the flange, so that its outer ring fits tightly against the inner wall of the groove due to elasticity. At the same time, the lower surface of the retaining ring 7 fits against the upper surface of the valve stem 4 ring, forming an axial anti-reverse mechanism. The top plates 9 of the integrally formed protrusions 8 at both ends of the retaining ring 7 are inserted into the arc-shaped through grooves 11 with an angle of less than 90° on the surface of the fixing ring 6. The valve stem 4 is fixed within the valve body 1 by means of the vertical plate 9, which limits and secures it within the groove. The operator screws the inner ring of the retaining ring 6 onto the external thread at the top of the valve stem 4, so that the lower surface of the retaining ring 6 fits against the upper surface of the retaining ring 7, forming a tight locking mechanism for the retaining ring 7. When the valve is working normally, the retaining ring 7 is locked in place by the vertical plate 9 and the retaining ring 6, preventing the retaining ring 7 from loosening and falling off, and ensuring that the valve stem 4 is reliably fixed within the valve body 1. When disassembly is required, the operator does not need to use tools; they only need to pinch the arc-shaped groove 10 on the outer side of the vertical plate 9 and refer to... Figure 8 The groove 10 is ergonomically designed. Simply pinch the recessed part of the groove 10 and bring the two sets of upright plates 9 together to close the notch of the retaining ring 7 and retract it. Then, rotate the fixing ring 6 to release the retaining ring 7 from the groove, and remove the valve stem 4 together. This allows for quick disassembly of the valve stem 4 and the internal butterfly plate 2 for subsequent maintenance and cleaning.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-release butterfly valve, comprising a valve body (1), a valve stem (4) installed inside, a control device (5) for controlling the rotation of the valve stem (4), and a flange connection between the valve body (1) and the control device (5), characterized in that: The valve stem (4) has a fixing ring (6) screwed to the outer ring at the top. The fixing ring (6) has a through groove (11) on its surface. A retaining ring (7) is installed at the top flange of the valve body (1). Two sets of protrusions (8) are fixed on the top surface of the retaining ring (7). The upright plates (9) on the top surface of the two sets of protrusions (8) are stuck in the through groove (11), and the outer surfaces of the two sets of upright plates (9) are all provided with grooves (10).

2. The quick-release butterfly valve according to claim 1, characterized in that: The top of the valve body (1) and the bottom of the control device (5) are both fixed with flanges, and the flanges are installed by bolts. The fixing ring (6) and the retaining ring (7) are both located in the circular groove opened on the flange.

3. A quick-release butterfly valve according to claim 2, characterized in that: A ring is fixed on the outer surface of the valve stem (4). The ring is located in the circular groove opened in the flange, and the upper surface of the ring is in contact with the lower surface of the retaining ring (7).

4. A quick-release butterfly valve according to claim 1, characterized in that: The fixing ring (6) has a circular ring structure, the through groove (11) has an arc-shaped structure with an angle of less than 90°, and the width of the through groove (11) is greater than the width of the vertical plate (9).

5. A quick-release butterfly valve according to any one of claims 2 and 4, characterized in that: The retaining ring (7) has a circular ring structure, and the retaining ring (7) has a ring cut off at less than 90°. The retaining ring (7) has a "C" shaped structure with a small opening, and the arc length of the notch of the retaining ring (7) is equal to the arc length of the groove (11). When the valve stem (4) is installed in the valve body (1), the outer ring of the retaining ring (7) and the inner wall of the circular groove are tightly fitted. The retaining ring (7) is made of elastic material. The retaining ring (7) and two sets of protrusions (8) are integrally formed. The two sets of protrusions (8) are respectively fixed on the "C" shaped end of the retaining ring (7). The upright plate (9) fixed on the protrusion (8) passes through the groove (11).

6. A quick-release butterfly valve according to claim 1, characterized in that: The upper surface of the retaining ring (7) and the lower surface of the fixing ring (6) are attached.

7. A quick-release butterfly valve according to claim 1, characterized in that: The groove (10) has an arc-shaped structure and is located above the fixing ring (6).

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