CN211344095U - Novel cast steel floating ball valve - Google Patents

Abstract

The utility model relates to a novel cast steel floating ball valve, comprising a valve body, a valve cover, a valve seat, a sphere, a valve stem and a transmission mechanism; the utility model is characterized in that: the upper end face of the mounting frame is a standard ISO platform, and the standard ISO platform is set on the standard ISO platform. Limit device and locking device; the limit device consists of a limit screw and a limit plate, the limit screw is installed in the first installation hole of the standard ISO platform, and the center hole of the limit plate is fixedly installed on the valve stem ; The locking device is composed of a lock hole and a lock pin on the limit plate. When the ball is in the fully open position, the lock hole on the limit plate is aligned with the second installation hole of the standard ISO platform. When the ball is in the fully closed position , the key hole on the limit plate is aligned with the third mounting hole of the standard ISO platform. It has the characteristics of small product size, low cost, small installation space and reliable sealing performance.

Description

New cast steel floating ball valve

technical field

The utility model belongs to the field of valves, in particular to a floating ball valve.

Background technique

The structure of floating ball valve generally includes valve body, valve cover, valve seat, ball body, valve stem, and transmission mechanism. The seats cooperate with each other, the lower end of the valve stem is movably linked with the square hole on the upper end of the sphere, the upper end of the valve stem is linked with the transmission mechanism, a sealing packing is arranged between the middle of the valve stem and the mounting bracket on the upper part of the valve body, and an anti-pulling is arranged between the valve stem and the valve body The transmission mechanism adopts manual, electric, pneumatic, and hydraulic devices. When manual, it is generally necessary to set a locking device between the transmission handle and the mounting frame to prevent accidental opening or closing. When using electric or pneumatic or hydraulic devices, Electric or pneumatic or hydraulic units are mounted on a standard ISO platform on the valve body. The disadvantage is: the transmission mechanism of the existing electric, pneumatic, hydraulic ball valve and manual ball valve cannot be compatible with each other. When manual operation is used, a locking device needs to be set between the transmission handle and the mounting frame, which increases the product volume and cost; The sealing packing is prone to leakage after being worn during the repeated rotation of the valve stem, and the sealing performance is poor.

SUMMARY OF THE INVENTION

Aiming at the shortcomings of the prior art, the utility model provides a manual mechanism that can be interchanged with electric, pneumatic and hydraulic mechanisms, the middle cavity has a self-sealing structure, the product is small in volume, low in cost, small in installation space, and has a sealing performance in the middle cavity. Reliable new cast steel floating ball valve.

The technical scheme of the utility model includes a valve body, a valve cover, a valve seat, a ball body, a valve stem, and a transmission mechanism. The ball body is floatingly installed in a valve cavity composed of a valve body and a valve cover, and the spherical surface and the valve seat cooperate with each other. The lower end is movably linked with the square hole at the upper end of the sphere, the upper end of the valve stem is connected with the handle, a sealing packing is arranged between the middle part of the valve stem and the mounting frame on the upper part of the valve body, and an anti-pulling device is arranged between the valve stem and the valve body, and the said anti-pulling device It is composed of the radial shoulder on the valve stem and the inner step at the entrance of the central cavity of the valve body. It is characterized in that: the upper end face of the mounting frame is a standard ISO platform, and a limit device and a locking device are set on the standard ISO platform. ; The limit device is composed of a limit screw and a limit plate, the limit screw is installed in the first installation hole of the standard ISO platform, and the center hole of the limit plate is fixedly installed on the valve stem. When the ball is in the fully open position , one end of the limit plate is in contact with the limit screw, and when the ball rotates 90° clockwise from the fully open position, the other end of the limit plate is in contact with the limit screw; the locking device is controlled by the lock on the limit plate. It consists of a hole and a lock pin. When the ball is fully open, the lock hole on the limit plate is aligned with the second installation hole of the standard ISO platform, and the lock pin penetrates into the lock hole and the second installation hole on the limit plate. When the ball is in the fully closed position, the locking hole on the limiting plate is aligned with the third mounting hole of the standard ISO platform, and the locking pin penetrates into the locking hole and the third mounting hole on the limiting plate.

In the above technical solution, a self-sealing device is arranged in the middle cavity of the valve body, and the self-sealing device is composed of a sealing gasket installed between the radial shoulder and the step in the valve body and a pressure-inducing hole on the sphere, and one end of the pressure-inducing hole is connected to each other. The inner hole of the sphere is connected with the lower end surface of the valve stem at the other end.

Compared with the prior art, the utility model has the following beneficial effects: the upper end of the mounting frame adopts a standard ISO platform structure, realizing the interchange of manual devices with electric, pneumatic and hydraulic devices, and using the mounting holes on the standard ISO platform and the limit plate The lock hole and the lock pin form a locking device, and the middle cavity is provided with a self-sealing device, which has the characteristics of small product volume, low cost, small installation space, and reliable sealing performance.

Description of drawings

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

FIG. 2 is a schematic structural diagram of the upper limit device and the locking device of the standard ISO platform in FIG. 1 of the present invention.

Detailed ways

The new type cast steel floating ball valve as shown in Figure 1 includes valve body 1, valve cover 2, valve seat 6, ball body 7, valve stem 8, transmission mechanism, valve body 1 and valve cover 2 are connected to each other by bolts 3 and nuts 4 , between the two, a metal wire pad 5 is arranged, and the transmission mechanism adopts the handle 21 sphere 7 to float and install in the valve cavity composed of the valve body 1 and the valve cover 2, and its spherical surface cooperates with the valve seat 6, and the valve seat 6 is installed in In the inlet channel of the valve body 1 and the outlet channel of the valve cover 2, the lower end of the valve stem 8 is movably linked with the square hole at the upper end of the ball body 7, and an anti-static device composed of a steel ball 9 and a spring 10 is arranged between the two, and the valve stem 8 The upper end is connected to the handle 21, and a sealing packing 13 is arranged between the middle part of the valve stem 8 and the mounting frame on the upper part of the valve body 1. In the stuffing box between the valve stem 8 and the mounting frame, a nut locking sleeve 18 is set on the compression nut 17, and an anti-pulling device is set between the valve stem 8 and the valve body 1, and the anti-pulling device is installed on the valve stem 8. The radial shoulder of the valve body 1 cooperates with the inner step at the entrance of the middle cavity of the valve body 1 to prevent the valve stem 8 from being driven upward by the medium pressure. 8. An O-shaped sealing ring 12 is arranged on the outer circular surface to strengthen the sealing of the middle cavity; it is characterized in that: the upper end face of the mounting frame is a standard ISO platform, and a limit device and a locking device are set on the standard ISO platform, and the standard ISO platform is The standard installation platform for electric devices, pneumatic devices and hydraulic control devices has four mounting holes on its upper end surface; the limit device is composed of limit screw 23 and limit plate 20, and the limit screw 23 is installed on the standard ISO platform In the first installation hole of the nut, the central hole of the limit plate 20 is fixedly installed on the valve stem 8, and a pressing washer 19 is arranged between the limit plate 20 and the nut locking sleeve 18. When the ball 7 is in the fully open position, the limit One end of the plate 20 is in contact with the limit screw 23, and when the ball 7 is rotated 90° clockwise from the fully open position, the other end of the limit plate 20 is in contact with the limit screw 23, as shown in FIG. 2; the locking The device consists of a lock hole and a lock pin on the limit plate 20. When the sphere 7 is fully open, the lock hole on the limit plate 20 is aligned with the second installation hole 24 of the standard ISO platform, and the lock pin penetrates into the limit In the lock hole on the plate 20 and the second installation hole 24, the valve opening position is locked. When the ball 7 is in the fully closed position, the lock hole on the limit plate 20 is aligned with the third installation hole 25 of the standard ISO platform, and the lock pin passes through. into the lock hole on the limit plate 20 and the third installation hole 25 to lock the valve closing position. The locking device is composed of the limit plate 20 and the installation hole on the standard ISO platform, which reduces the product volume and installation space, Reduced costs. After removing the handle 21, the limit plate 20 and the pressing pad 19, the electric, pneumatic or hydraulic control device can be installed on the standard ISO platform, and the interchangeability is good.

A self-sealing device is arranged in the middle cavity of the valve body 1. The self-sealing device is composed of a sealing gasket 11 installed between the radial shoulder of the valve stem 8 and the inner step of the valve body 1 and a pressure-inducing hole 22 on the ball body 7. One end of the hole 22 is connected to the inner hole of the ball body 7, and the other end is connected to the lower end surface of the valve stem 8. The medium pressure in the channel of the ball body 7 is introduced into the lower end surface of the valve stem 8, and the valve stem 8 is pushed upward, and the sealing gasket 11 is pressed to realize The cavity pressure is self-sealing.

Claims (2)

1. A novel cast steel floating ball valve comprises a valve body (1), a valve cover (2), a valve seat (6), a ball body (7), a valve rod (8) and a transmission mechanism, wherein the transmission mechanism adopts a handle (21), the ball body (7) is installed in a valve cavity formed by the valve body (1) and the valve cover (2) in a floating mode, the ball surface of the ball body is matched with the valve seat (6), the lower end of the valve rod (8) is movably connected with a square hole in the upper end of the ball body (7), the upper end of the valve rod (8) is connected with the handle (21), a sealing filler (13) is arranged between the middle part of the valve rod (8) and an installation frame in the upper part of the valve body (1), an anti-knocking device is arranged between the valve rod (8) and the valve body (1), and the anti-knocking device is formed by mutually; the method is characterized in that: the upper end surface of the mounting frame is a standard ISO platform, and a limiting device and a locking device are arranged on the standard ISO platform; the limiting device comprises a limiting screw rod (23) and a limiting plate (20), the limiting screw rod (23) is installed in a first installation hole of the standard ISO platform, a center hole of the limiting plate (20) is fixedly installed on the valve rod (8), one end of the limiting plate (20) is in top contact with the limiting screw rod (23) when the sphere (7) is in a fully-opened position, and the other end of the limiting plate (20) is in top contact with the limiting screw rod (23) when the sphere (7) rotates clockwise by 90 degrees from the fully-opened position; the locking device is composed of a lock hole and a lock pin on the limiting plate (20), when the ball body (7) is in a fully-open position, the lock hole on the limiting plate (20) is aligned with the second mounting hole (24) of the standard ISO platform, the lock pin penetrates into the lock hole on the limiting plate (20) and the second mounting hole (24), when the ball body (7) is in a fully-closed position, the lock hole on the limiting plate (20) is aligned with the third mounting hole (25) of the standard ISO platform, and the lock pin penetrates into the lock hole on the limiting plate (20) and the third mounting hole (25).

2. Novel cast steel floating ball valve according to claim 1, characterized in that the cavity in the valve body (1) is provided with a self-sealing device, which consists of a sealing gasket (11) arranged between the radial shoulder of the valve stem (8) and the step in the valve body (1) and a pressure guide hole (22) on the ball body (7), wherein one end of the pressure guide hole (22) is communicated with the inner hole of the ball body (7), and the other end is communicated with the lower end surface of the valve stem (8).

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