CN207161733U - A kind of valve shaft adjusting apparatus of vertical butterfly valve - Google Patents

Abstract

It the utility model is related to a kind of valve shaft adjusting apparatus of vertical butterfly valve, it includes valve body and valve shaft, valve body lower end is provided with matched hubcap, the adjusting apparatus being engaged with valve shaft is provided with hubcap, the adjusting apparatus includes the support block and regulating bolt to offset, the upper surface of support block and the lower surface of the valve shaft are offseted, and sealing ring I annular seal groove I is provided with support block, and regulating bolt includes overhead portion, threaded portion and the rotation section of integral type.The valve shaft adjusting apparatus of the vertical butterfly valve it is simple and reasonable, when valve shaft and butterfly plate sink, sealing pair can not fit like a glove when causing sealing leak, bottom can directly be pulled down, regulating bolt is adjusted with spanner, valve shaft is risen to the completely concentric identical position of sealing pair with butterfly valve butterfly plate, ensures the sealing of valve, it is practical simple, good airproof performance, repair convenient, good economy performance, service life is grown, securely and reliably.

Description

A shaft adjustment device for a vertical butterfly valve

technical field

The utility model relates to the technical field of butterfly valves, in particular to a valve shaft adjusting device for a vertical butterfly valve.

Background technique

Butterfly valve, also known as flap valve, is a regulating valve with simple structure, which can be used for switch control of low-pressure pipeline media. A kind of valve, the valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment.

However, when the existing butterfly valve is installed vertically, the weight of the valve shaft and the butterfly plate directly acts on the plane of the shaft end cover through the bottom end of the valve shaft. Closed and continuous rotation produces friction and wear. In addition, the butterfly valve is installed vertically, and the valve shaft and the butterfly plate are under the condition of their own weight, and the butterfly plate and the valve shaft will produce stress deformation. The above two factors lead to the sinking of the valve shaft and the butterfly plate, resulting in the misalignment of the sealing ring of the butterfly plate and the sealing ring of the valve body.

Utility model content

In order to overcome the shortcomings of the background technology, the utility model provides a valve shaft adjustment device for a vertical butterfly valve, which mainly solves the problem that the valve shaft and the butterfly plate of the existing butterfly valve sink after long-term use and the butterfly plate is not tightly closed.

The technical solution adopted by the utility model is: a valve shaft adjustment device for a vertical butterfly valve, which includes a valve body and a valve shaft, the lower end of the valve body is provided with a shaft end cover that matches it, and the shaft end cover is provided with a An adjustment device matched with the valve shaft, the adjustment device includes a supporting block and an adjusting bolt, the upper end surface of the supporting block is opposed to the lower end surface of the valve shaft, and an annular seal with a sealing ring I is arranged on the supporting block. Slot 1, the adjusting bolt includes an integrated top part, threaded part and rotating part, the upper end surface of the top part is offset against the lower end surface of the support block, and the rotating part is provided with a hexagonal head structure.

As a further description of the utility model, preferably, an adjustment installation position is provided at the center of the shaft end cover, and the adjustment installation position includes a supporting part and an adjustment part connected to each other, and the support part and the adjustment part are respectively provided with the above-mentioned support block and the adjusting bolt, the inner wall of the adjusting part is provided with an internal thread matching the threaded part.

As a further description of the utility model, preferably, the valve shaft is interspersed in the valve body, the upper end of the valve shaft is fixedly connected with the butterfly plate of the butterfly valve, and the outer sleeve of the valve shaft is provided with a sleeve matching the valve body. The lower part of the valve shaft is also provided with an annular groove, and an annular gasket is sleeved on the annular groove.

As a further description of the utility model, preferably, the lower end of the shaft end cover is provided with a bottom cover that matches it, and the upper and lower ends of the shaft end cover are connected to the valve body and the bottom cover through bolts I and II respectively. For fixed connection, both the shaft end cover and the bottom cover are provided with a connected annular protrusion and an annular sealing groove II, and a sealing ring II is embedded in the annular sealing groove II.

As a further description of the utility model, preferably, the adjustment mounting position further includes a groove portion adapted to the annular protrusion, and the groove portion communicates with the adjustment portion.

The beneficial effects of the utility model are: due to the adoption of the above-mentioned technical scheme, the structure of the valve shaft adjustment device of the vertical butterfly valve is simple and reasonable. Lower the bottom cover, adjust the adjusting bolt with a wrench, so that the valve shaft and the butterfly plate of the butterfly valve rise to the position where the sealing pair is completely concentric, ensuring the sealing of the valve, and greatly improving the overall performance of the valve shaft adjustment device of the vertical butterfly valve, which is practical and simple , good sealing, convenient maintenance, good economy, long service life, safe and reliable.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure 1, bottom cover; 11, bolt II; 2, shaft end cover; 21, adjustment part; 3, adjustment bolt; 31, top part; 32, thread part; 33, rotating part; 4, support block; 41 , sealing ring I; 5, valve shaft; 51, shaft sleeve; 52, ring gasket; 6, valve body; 61, bolt I; 7, annular protrusion; 8, sealing ring II.

Detailed ways

Below in conjunction with accompanying drawing, the utility model embodiment is further described:

As shown in Figure 1, a valve shaft adjustment device for a vertical butterfly valve includes a valve body 6 and a valve shaft 5, the lower end of the valve body 6 is provided with a shaft end cover 2 matching it, and the shaft end cover 2 is provided with a There is an adjustment device matched with the valve shaft 5, the adjustment device includes a supporting block 4 and an adjusting bolt 3, the upper end face of the supporting block 4 is in contact with the lower end face of the valve shaft 5, and a belt is set on the supporting block 4. There is an annular sealing groove 1 with sealing ring 1 41, and the adjusting bolt 3 includes an integrated top part 31, a threaded part 32 and a rotating part 33, the upper end surface of the top part 31 is in contact with the lower end surface of the support block 4, and the rotating part 33 is the hexagonal head structure setting, the hexagonal head structure setting is convenient to turn the adjusting bolt 3, when the valve shaft 5 and the butterfly plate of the butterfly valve sink, and the sealing pair cannot be completely matched and the seal leaks, the bottom cover 1 can be removed directly and adjusted with a wrench Adjust the bolt 3, so that the valve shaft 5 and the butterfly plate rise to the position where the sealing pair is completely concentric, so that the best sealing state of the valve can be restored.

In a further setting of this embodiment, the center of the shaft end cover 2 is provided with an adjustment installation position, and the adjustment installation position includes a supporting part and an adjustment part 21 connected to each other, and the support part and the adjustment part 21 are respectively provided with the above-mentioned support For the block 4 and the adjusting bolt 3 , the inner wall of the adjusting part is provided with an internal thread matching the threaded part 32 , and the adjusting part is connected to the threaded part 32 through the internal thread.

Further setting of this embodiment, the valve shaft 5 is interspersed in the valve body 6, the upper end of the valve shaft 5 is fixedly connected with the butterfly plate of the butterfly valve, and the valve shaft 5 is covered with a shaft that matches the valve body 6. Sleeve 51, the shaft sleeve 51 is used to protect the valve shaft to reduce its wear, and the lower part of the valve shaft 5 is also provided with an annular groove, and an annular gasket 52 is sleeved on the annular groove.

In the further setting of this embodiment, the lower end of the shaft end cover 2 is provided with a bottom cover 1 matching it. The bottom cover 1 prevents the butterfly valve from being damaged when the butterfly valve is in normal use and the sealing performance of the butterfly valve is reduced. The ends are fixedly connected to the valve body 6 and the bottom cover 1 through bolts I 61 and bolts II 11, respectively, and the shaft end cover 2 and the bottom cover 1 are provided with connected annular protrusions 7 and annular sealing grooves II. A sealing ring II 8 is embedded in the sealing groove II, and the annular protrusion 7 and the sealing ring II 8 cooperate with each other to achieve a sealing effect.

According to a further setting of this embodiment, the adjustment mounting position further includes a groove part matched with the annular protrusion 7, and the groove part communicates with the adjustment part.

The structure of the valve shaft adjustment device of the vertical butterfly valve is simple and reasonable. When the valve shaft 5 sinks with the butterfly plate and the sealing pair cannot be completely matched to cause seal leakage, the bottom cover 1 can be removed directly, and the adjusting bolt 3 can be adjusted with a wrench to make The valve shaft 5 and the butterfly plate of the butterfly valve rise to the position where the sealing pair is completely concentric, ensuring the sealing of the valve and greatly improving the overall performance of the valve shaft adjustment device of the vertical butterfly valve. It is practical and simple, has good sealing performance, convenient maintenance and economical efficiency Good, long service life, safe and reliable.

Notes to all technical personnel: Although the utility model has been described according to the above-mentioned specific embodiments, the inventive idea of the utility model is not limited to this utility model, and any modification using the inventive idea will be included in the protection scope of the patent right Inside.

Claims (5)

1. A valve shaft adjustment device for a vertical butterfly valve, comprising a valve body and a valve shaft, the lower end of the valve body is provided with a shaft end cover matching it, and an adjustment device matching the valve shaft is arranged in the shaft end cover, It is characterized in that: the adjustment device includes a supporting block and an adjusting bolt that are offset, the upper end surface of the supporting block is offset against the lower end surface of the valve shaft, an annular sealing groove I with a sealing ring I is arranged on the supporting block, and the adjusting bolt It includes an integral top part, a thread part and a rotating part, the upper end surface of the top part is against the lower end surface of the support block, and the rotating part is set in a hexagonal head structure. 2. A valve shaft adjustment device for a vertical butterfly valve according to claim 1, characterized in that: an adjustment installation position is provided at the center of the shaft end cover, and the adjustment installation position includes a connected support part and an adjustment part The support block and the adjustment bolt are respectively provided in the support part and the adjustment part, and the inner wall of the adjustment part is provided with an internal thread matching the threaded part. 3. A valve shaft adjustment device for a vertical butterfly valve according to claim 1, characterized in that: the valve shaft is interspersed in the valve body, the upper end of the valve shaft is fixedly connected with the butterfly plate of the butterfly valve, and the valve shaft The outer sleeve is provided with a shaft sleeve matching the valve body, and the lower part of the valve shaft is also provided with an annular groove, and an annular gasket is sleeved on the annular groove. 4. The valve shaft adjustment device of a vertical butterfly valve according to claim 1, characterized in that: the lower end of the shaft end cover is provided with a bottom cover that is compatible with it, and the upper and lower ends of the shaft end cover are passed through bolts I and The bolt II is fixedly connected with the valve body and the bottom cover respectively. Both the shaft end cover and the bottom cover are provided with a connected annular protrusion and an annular sealing groove II, and a sealing ring II is embedded in the annular sealing groove II. 5. A valve shaft adjustment device for a vertical butterfly valve according to claim 2, characterized in that: the adjustment installation position also includes a groove part that is compatible with the annular protrusion, and the groove part and the The adjustment parts are connected.