CN216666532U

CN216666532U - Key structure for butterfly valve

Info

Publication number: CN216666532U
Application number: CN202123216778.0U
Authority: CN
Inventors: 于友林
Original assignee: Wuxi Zool Control Valves Co ltd
Current assignee: Wuxi Zool Control Valves Co ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-06-03
Anticipated expiration: 2031-12-20

Abstract

The utility model provides a key structure for a butterfly valve, which comprises a shaft and a valve plate, wherein two shaft heads fixed on the valve plate are sleeved on the shaft; a key groove is formed in the side surface of the shaft; one end of the key groove is correspondingly arranged in one of the shaft heads, and the other end of the key groove is correspondingly arranged in the other shaft head; two ends in the key groove are embedded with transmission keys, and a limit key is arranged between the two transmission keys; the key structure for the butterfly valve is simple in structure and convenient to use, the transmission key and the limiting key can be mounted without pulling the shaft through the transmission key and the limiting key, the shaft and the valve plate do not need to be displaced relatively in the whole process, labor is saved, and assembly efficiency is improved.

Description

Key structure for butterfly valve

Technical Field

The utility model relates to the technical field of keys, in particular to a key structure for a butterfly valve.

Background

In the current butterfly valve, the valve plate and the shaft are fixed by one or more fixed pins or keys, and the shaft drives the valve plate to rotate when rotating, so that the opening and closing or adjusting function of the butterfly valve is achieved. When the transmission torque is larger or the use temperature is higher and the thermal deformation exists, the key connection is more reliable. When the butterfly valve key is connected, a moving displacement space is needed. The existing key structure can only install the connecting key at the shaft head on one side, and the keys cannot be installed at the upper shaft head part and the lower shaft head part simultaneously, so that the using quantity of the keys is weakened, and the connecting strength is reduced. In the traditional key structure, when in installation, the shaft can only pass through the shaft head of the valve plate in one direction for installation. After the valve plate is installed on the shaft in a key interference mode, the valve plate is difficult to take out, the shaft needs to be knocked up and down, the shaft is forced to have relative displacement with the valve plate, the whole key is exposed, the key can be taken out, the valve plate and the shaft can be detached, and great difficulty is brought to the detachment and installation.

Disclosure of Invention

The key structure for the butterfly valve is simple in structure and convenient to use, the transmission key and the limiting key can be mounted without pulling the shaft through the transmission key and the limiting key, the shaft and the valve plate do not need to be displaced relatively in the whole process, labor is saved, and assembling efficiency is improved.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a key structure for a butterfly valve comprises a shaft and a valve plate, wherein two shaft heads fixed on the valve plate are sleeved on the shaft; a key groove is formed in the side surface of the shaft; one end of the key groove is correspondingly arranged in one of the shaft heads, and the other end of the key groove is correspondingly arranged in the other shaft head; the two ends in the key groove are embedded with transmission keys, and a limit key is arranged between the two transmission keys.

Preferably, two fixing holes are formed in the limiting key.

Preferably, a first threaded hole is formed in the shaft corresponding to the fixing hole.

Preferably, the top of the two transmission keys is provided with a second threaded hole at one end close to the limiting key.

Preferably, the fixing hole is a counter-sunk hole.

The utility model has the beneficial effects that: the key structure for the butterfly valve is simple in structure and convenient to use, the transmission key and the limiting key can be mounted without pulling the shaft through the transmission key and the limiting key, the shaft and the valve plate do not need to be displaced relatively in the whole process, labor is saved, and assembly efficiency is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic sectional view taken along line a-a in fig. 1.

FIG. 3 is a cross-sectional structural view of the shaft and stub shaft of the present invention.

Fig. 4 is a schematic structural diagram of the transmission key of the present invention.

Fig. 5 is a schematic structural view of the limit key according to the present invention.

In the figure, 1-shaft, 11-first threaded hole, 2-valve plate, 21-shaft head, 3-transmission key, 31-second threaded hole, 4-limit key and 41-fixing hole.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5: a key structure for a butterfly valve comprises a shaft 1 and a valve plate 2, wherein two shaft heads 21 fixed on the valve plate 2 are sleeved on the shaft 1; a key groove is formed in the side surface of the shaft 1; one end of the key groove is correspondingly arranged in one of the shaft heads 21, and the other end of the key groove is correspondingly arranged in the other shaft head 21; both ends in the keyway all inlay and are equipped with transmission key 3, just are two be equipped with spacing key 4 between the transmission key 3.

According to the utility model, through the transmission key 3 and the limit key 4, the transmission key 3 and the limit key 4 can be installed without pulling the shaft 1, and the shaft 1 and the valve plate 2 do not need to have relative displacement in the whole process, so that the labor is saved, and the assembly efficiency is improved.

Furthermore, two fixing holes 41 are formed on the limit key 4.

Further, a first screw hole 11 is provided in the shaft 1 corresponding to the fixing hole 41.

Through the cooperation of fixed orifices 41 and first screw hole 11, adopt hexagon socket head cap screw 5 will spacing key 4 is fixed on the axle 1, and will two the restriction of drive key 3 is in between axle 1 and the spindle nose 21, guarantee better transmission effect.

When the transmission key 3 is disassembled, the limiting key 4 is only required to be taken down from the shaft 1, the transmission key 3 can be taken out easily, the shaft 1 and the valve plate 2 do not need to be displaced relatively in the whole process, labor is saved, and the assembly efficiency is improved.

Further, the top of the two transmission keys 3 is provided with a second threaded hole 31 at one end close to the limit key 4.

Through the second screw hole 31, when the transmission key 3 is disassembled, the hexagon socket head cap screw 5 is screwed into the second screw hole 31, and then the hexagon socket head cap screw 5 is pulled, so that the transmission key 3 can be easily taken out.

Further, the fixing hole 41 is a counter-sunk hole.

By adopting the counter bore, the hexagon socket head cap screw 5 can be hidden in the counter bore, and the influence of the hexagon socket head cap screw 5 on other structures during rotation is avoided.

The working principle of the utility model is as follows: when the key structure is installed, the shaft 1 penetrates through the shaft head 21 on the valve plate 2 and moves to a specified position; the driving key 3 is arranged in a key groove on the shaft 1 and pushed to a position between the shaft and the shaft head; then the limit key 4 is arranged in the key groove on the shaft 1, and the limit key 4 is fixed on the shaft 1 by the hexagon socket head cap screw 5.

When the key is detached, the limit key 4 is taken out firstly, then the detached hexagon socket head cap screw 5 is screwed into the second threaded hole 31 of the transmission key 3, and the transmission key 3 can be taken out by pulling the bolt 5.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A key structure for a butterfly valve, comprising: the valve comprises a shaft (1) and a valve plate (2), wherein two shaft heads (21) fixed on the valve plate (2) are sleeved on the shaft (1); a key groove is formed in the side surface of the shaft (1); one end of the key groove is correspondingly arranged in one shaft head (21), and the other end of the key groove is correspondingly arranged in the other shaft head (21); both ends in the keyway are all inlayed and are equipped with transmission key (3), and are two be equipped with spacing key (4) between transmission key (3).

2. The key structure for a butterfly valve according to claim 1, wherein: two fixing holes (41) are formed in the limiting key (4).

3. The key structure for a butterfly valve according to claim 2, wherein: and a first threaded hole (11) is formed in the shaft (1) corresponding to the fixing hole (41).

4. The key structure for a butterfly valve according to claim 2, wherein: and second threaded holes (31) are formed in the tops of the two transmission keys (3) and at the end close to the limiting key (4).

5. The key structure for a butterfly valve according to claim 2, wherein: the fixing hole (41) is a counter bore.