Stop mechanism and butterfly valve

Abstract

The utility model relates to the field of butterfly valves, in particular to a stop mechanism and a butterfly valve, the stop mechanism comprises a mounting assembly, and the mounting assembly comprises an annular piece; the jacking assembly comprises a jacking rod arranged on the annular piece, and the jacking rod is movably arranged in the radial direction of the annular piece; the stop mechanism is fixed in the mode that the two arc-shaped plates are used for holding the shaft, a force source is provided for the ejector rod, the ejector rod only needs to be loosened and tightened by hands when adjustment is needed after installation, no additional tool needs to be provided, and operation is convenient and fast; the annular piece adopts a mode of combining two arc-shaped plates, and can be widely applied to locking of butterfly valves of different models; according to feedback of application examples, the stop mechanism can effectively achieve the stop function of the butterfly valve, safe and stable operation of equipment can be guaranteed, and manpower resource investment caused by back closing of the valve can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valves, and in particular to a stop mechanism and a butterfly valve. Background Technology

[0002] A butterfly valve is a simple regulating valve. Its working principle involves a disc-shaped plate rotating around its own axis within the valve body, thereby achieving opening, closing, or regulation. A butterfly valve typically only requires a 0-90° rotation to go fully open or fully closed. The butterfly valve and stem themselves do not have self-locking capability; the disc is positioned using a worm gear reducer mounted on the stem. Using a worm gear reducer not only gives the disc self-locking capability and allows it to stop at any position, but also improves the valve's operational performance.

[0003] However, when a butterfly valve is used as a flow control valve, it is usually in the middle opening position (i.e., not in the fully open or fully closed position). If the self-locking ability of its worm gear reducer on the butterfly plate is insufficient to overcome the reverse force of the water flow, the butterfly valve will close back, resulting in a decrease in water supply flow and changes in pipeline pressure, which seriously threatens the safe operation of the equipment. Once the butterfly valve closes back, the valve must be adjusted to the original opening as soon as possible, otherwise it may lead to start-up failure or increased equipment operating temperature, increasing maintenance costs. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is: how to avoid the problem of butterfly valve closing during use.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a stopping mechanism, including an installation component, the installation component including an annular component; and a clamping component, the clamping component including a push rod disposed on the annular component, the push rod being movably disposed radially along the annular component.

[0006] In a preferred embodiment of the stop mechanism of this utility model: the annular component includes two arc-shaped plates arranged opposite to each other, and the two arc-shaped plates are detachably connected.

[0007] In a preferred embodiment of the stop mechanism of this utility model: one of the arc-shaped plates has a protrusion extending outward integrally on one side, the push rod is a threaded rod, and the push rod is radially threaded to the protrusion along the annular part.

[0008] In a preferred embodiment of the stop mechanism of this utility model: the protrusion is fan-shaped, the outer end face of the protrusion is flush with the outer end face of the arc plate on which it is located, and the width of the protrusion is smaller than the outer diameter of the arc plate.

[0009] In a preferred embodiment of the stopping mechanism of this utility model: both ends of the arc-shaped plate have flanges extending outward integrally, and the flanges of the two arc-shaped plates are connected by bolts for disassembly.

[0010] In a preferred embodiment of the stopping mechanism described in this utility model, the push rod is a butterfly bolt.

[0011] In a preferred embodiment of the stopping mechanism described in this utility model, the bolts connecting the two arc-shaped plates are butterfly bolts.

[0012] A butterfly valve, including the aforementioned stop mechanism, further includes,

[0013] A transmission assembly includes a worm gear box, a worm gear rotatably disposed inside the worm gear box, an end cover disposed on the worm gear box, an annular component sleeved outside the end cover, and a push rod abutting against the worm gear.

[0014] In a preferred embodiment of the butterfly valve described in this utility model: the push rod abuts against the portion of the worm gear outside the worm gear housing.

[0015] In a preferred embodiment of the butterfly valve of this utility model: the worm gear is recessed inward at a position corresponding to the push rod to form a groove, and the shape of the groove is adapted to the shape of the inner end of the push rod.

[0016] The beneficial effects of this utility model are as follows: the stop mechanism is fixed by two arc-shaped plates holding the shaft, providing a power source for the push rod. When adjustment is needed after installation, only the push rod needs to be tightened or loosened by hand, without the need for additional tools, making operation convenient; the annular part adopts the combination of two arc-shaped plates, which can be widely used for stopping different types of butterfly valves; according to application examples, this stop mechanism can effectively realize the stopping function of butterfly valves, ensure the safe and stable operation of equipment, and reduce the manpower input caused by valve closure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0018] Figure 1 A schematic diagram of the overall structure of the stop mechanism is shown;

[0019] Figure 2 A schematic diagram of the overall structure of the butterfly valve is shown;

[0020] Figure 3 A schematic diagram showing the layout of the grooves is provided. Detailed Implementation

[0021] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0023] Reference Figure 1 This embodiment provides a stopping mechanism, including:

[0024] Mounting component 1, which includes a ring-shaped component 11;

[0025] The clamping assembly 2 includes a push rod 21 disposed on the annular member 11, and the push rod 21 is radially movably disposed along the annular member 11.

[0026] This stop mechanism is used for locking and positioning shaft components. Specifically, the annular part 11 is used for the installation of the entire stop mechanism. During installation, the annular part 11 is coaxially located outside the shaft component that needs to be locked, and the inner end of the push rod 21 is directly opposite the shaft component that needs to be locked. When locking is required, the push rod 21 moves toward the shaft component that needs to be locked, so that the inner end of the push rod 21 is pressed tightly against the shaft component that needs to be locked. When unlocking is required, the push rod 21 can be moved away from the shaft component.

[0027] The upper stop mechanism has a simple structure and can lock and position shaft components with simple operation, preventing the shaft components from rotating under external force when they need to stay in the current position, thus ensuring the stable operation of the equipment.

[0028] Reference Figure 1 As an optional embodiment, the annular component 11 includes two opposing arcuate plates 111, which are detachably connected.

[0029] In the stopping mechanism, the ring part 11 is composed of two arc-shaped plates 111 that can be disassembled and combined, and can be installed in different sizes of installation positions, thereby improving the applicability of the stopping mechanism.

[0030] Reference Figure 1 In one embodiment provided in this application, one of the arc-shaped plates 111 has an integrally outwardly extending protrusion 112 on one side, and the push rod 21 is a threaded rod, and the push rod 21 is radially threaded to the protrusion 112 along the annular part 11.

[0031] One of the arc-shaped plates 111 extends outward from one side to form a protrusion 112 for mounting a push rod 21. The push rod 21 is a threaded rod and is movably mounted on the protrusion 112 by means of a threaded connection. By turning the push rod 21, the shaft component can be tightened or loosened, which is very convenient to operate.

[0032] Reference Figure 1 In one embodiment provided in this application, the protrusion 112 is fan-shaped, the outer end face of the protrusion 112 is flush with the outer end face of the arc plate 111, and the width of the protrusion 112 is smaller than the outer diameter of the arc plate 111.

[0033] The width of the protrusion 112 is smaller than the outer diameter of the arc plate 111, so that the inner end of the arc plate 111 is a certain distance from the axis of the arc plate 111, so as to avoid the protrusion 112 from hindering the installation of the entire stop mechanism and to ensure that the shaft component can be inserted at the axis of the arc plate 111. The specific width of the protrusion 112 is determined according to the outer diameter of the shaft component, so as not to affect the overall installation.

[0034] Reference Figure 1 As an optional embodiment, the two ends of the arc plate 111 are integrally extended outward with flanges 113, and the flanges 113 of the two arc plates 111 are connected by bolts in a detachable manner; the top rod 21 is a butterfly bolt; the bolts connecting the two arc plates 111 are butterfly bolts.

[0035] The two arc-shaped plates 111 are connected by bolts for easy disassembly and assembly. The top rod 21 and the bolts connecting the two arc-shaped plates 111 are all butterfly bolts, which facilitates the tightening of the bolts and thus facilitates disassembly, assembly and adjustment.

[0036] Reference Figure 2 This embodiment provides a butterfly valve, including an upper stop mechanism, and also includes,

[0037] The transmission assembly 3 includes a worm gear 32 housing 31, in which a worm gear 32 is rotatably disposed. An end cover 33 is disposed on the worm gear 32 housing 31, an annular member 11 is sleeved on the outside of the end cover 33, and a push rod 21 abuts against the worm gear 32.

[0038] Of course, the upper butterfly valve also includes a valve body 4 and a handwheel 5. The valve body 4 has a valve plate and a valve stem. The transmission assembly 3 also includes a turbine box 35, which has a turbine. The other end of the valve stem is fixed at the center of the turbine. The worm gear 32 is connected to the turbine. The outer end of the worm gear 32 is fixed at the center of the handwheel 5.

[0039] The annular part 11 is fitted onto the outside of the end cap 33 on the worm gear 32 box 31. The push rod 21 is directly opposite the worm gear 32. By turning the push rod 21, the worm gear 32 can be locked and positioned.

[0040] Reference Figure 2 As an alternative embodiment, the push rod 21 abuts against the portion of the worm gear 32 outside the worm gear 32 housing 31.

[0041] The protrusion 112 on the annular part 11 is arranged on the side facing the handwheel 5. The push rod 21 is threadedly connected to the protrusion 112, so that the push rod 21 can push against the exposed part of the worm 32 outside the worm 32 box 31, without the need to drill a through hole in the end cover 33 for the push rod 21 to pass through.

[0042] Reference Figure 2-3 In one embodiment provided in this application, the worm 32 is recessed inward at a position corresponding to the push rod 21 to form a groove 34, and the shape of the groove 34 is adapted to the shape of the inner end of the push rod 21.

[0043] A recessed groove 34 is made on the worm 32 at the position corresponding to the push rod 21. The locking and positioning effect of the worm 32 is improved by the cooperation of the push rod 21 and the recessed side. In specific use, when it is necessary to change the opening of the butterfly valve, it is only necessary to release the push rod 21 from the worm 32. After the opening is determined, loosen the bolts connecting the two arc plates 111, rotate the ring part 11 on the end cover 33 to adjust the push rod 21 to be directly aligned with the groove 34 on the worm 32, then retighten the bolts connecting the two arc plates 111, and finally turn the push rod 21 to press it tightly against the groove 34 on the worm 32.

[0044] The stop mechanism is fixed by two arc-shaped plates 111 holding the shaft, providing a power source for the push rod 21. After installation, when adjustment is needed, only the push rod 21 needs to be tightened or loosened by hand, without the need for additional tools, making operation convenient. The annular part 11 adopts the combination of two arc-shaped plates 111, which can be widely used for stopping different types of butterfly valves. According to application examples, this stop mechanism can effectively realize the stopping function of butterfly valves, ensure the safe and stable operation of equipment, and reduce the manpower input caused by valve back-closing.

[0045] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A stopping mechanism, characterized in that: include, Mounting component (1), the mounting component (1) including an annular element (11); The clamping assembly (2) includes a push rod (21) disposed on the annular member (11), the push rod (21) being radially movably disposed along the annular member (11).

2. The stopping mechanism according to claim 1, characterized in that: The annular component (11) includes two opposing arc-shaped plates (111) that are detachably connected.

3. The stopping mechanism according to claim 2, characterized in that: One of the arc-shaped plates (111) has an integrally extended protrusion (112) on one side, and the push rod (21) is a threaded rod, and the push rod (21) is radially threaded to the protrusion (112) along the annular part (11).

4. The stopping mechanism according to claim 3, characterized in that: The protrusion (112) is fan-shaped, and the outer end face of the protrusion (112) is flush with the outer end face of the arc plate (111) on which it is located. The width of the protrusion (112) is smaller than the outer diameter of the arc plate (111).

5. The stopping mechanism according to claim 4, characterized in that: Both ends of the arc-shaped plate (111) have flanges (113) extending outward integrally, and the flanges (113) of the two arc-shaped plates (111) are connected by bolts for disassembly.

6. The stopping mechanism according to claim 5, characterized in that: The top rod (21) is a butterfly bolt.

7. The stopping mechanism according to claim 6, characterized in that: The bolts connecting the two arc-shaped plates (111) are butterfly bolts.

8. A butterfly valve, characterized in that: Including the stopping mechanism as described in any one of claims 1 to 7, it further includes, The transmission assembly (3) includes a worm gear (32) housing (31), in which a worm gear (32) is rotatably disposed, and an end cap (33) is disposed on the worm gear (32) housing (31). The annular member (11) is sleeved on the outside of the end cap (33), and the push rod (21) abuts against the worm gear (32).

9. The butterfly valve according to claim 8, characterized in that: The push rod (21) abuts against the portion of the worm gear (32) outside the worm gear (32) housing (31).

10. The butterfly valve according to claim 9, characterized in that: The worm (32) is recessed inward at a position corresponding to the top rod (21) to form a groove (34), the shape of which is adapted to the shape of the inner end of the top rod (21).

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