阅读说明：本技术 一种低温球阀无销孔加长阀杆防吹出结构 (Structure is prevented blowing off by no pinhole extension valve rod of low temperature ball valve ) 是由 岳阳 李军业 于 2019-11-26 设计创作，主要内容包括：本发明属于阀门领域,具体地说是涉及一种低温球阀无销孔加长阀杆防吹出结构。一种低温球阀无销孔加长阀杆防吹出结构,其中,包括球体、加长阀杆、防吹出套,所述的球体设置在加长阀杆的末端,加长阀杆通过防吹出套与球体连接。本发明的显著效果是：该结构是在原低温球阀带销孔加长阀杆防吹出结构的改进,利用低温球阀无销孔加长阀杆防吹出结构,有效的控制了阀门的制造成本、减少了阀体重新开模,是无需对加长阀杆加粗打孔,无需增加阀体防吹出内部空间,是利用防吹出套与加长阀杆装配后旋转90度角插入球体阀杆槽中间隙配合后,就能实现防吹出,降低了阀门制造成本,适用范围广。(The invention belongs to the field of valves, and particularly relates to a blow-out preventing structure of a low-temperature ball valve pin-hole-free lengthened valve rod. The utility model provides a structure is prevented blowing off by no pinhole extension valve rod of low temperature ball valve, wherein, includes spheroid, extension valve rod, prevents blowing off the cover, the spheroid setting at the end of extension valve rod, the extension valve rod is connected with the spheroid through preventing blowing off the cover. The invention has the following remarkable effects: this structure is at former low temperature ball valve area pinhole extension valve rod and prevents the improvement that blows off the structure, utilize low temperature ball valve no pinhole extension valve rod to prevent blowing off the structure, the effectual manufacturing cost who controls the valve, reduced the mould sinking again of valve body, need not to add the thick punching of extension valve rod, need not to increase the valve body and prevent blowing off the inner space, it inserts the clearance cooperation back in the spheroid valve rod groove to utilize to prevent blowing off cover and extension valve rod assembly back rotatory 90 degrees angles, just can realize preventing blowing off, valve manufacturing cost is reduced, application scope is wide.)

1. The utility model provides a structure is prevented blowing off by no pinhole extension valve rod of low temperature ball valve which characterized in that: including spheroid (1), extension valve rod (2), prevent blowing out cover (3), spheroid (1) set up the end at extension valve rod (2), extension valve rod (2) are connected with spheroid (1) through preventing blowing out cover (3).

2. The anti-blow-out structure of the pin-hole-free extension valve rod of the cryogenic ball valve as claimed in claim 1, wherein: the ball body (1) is provided with a strip-shaped groove, the tail end of the long valve rod (2) is provided with a strip-shaped bulge, and the strip-shaped bulge is matched with the strip-shaped groove in shape.

3. The anti-blow-out structure of the pin-hole-free extension valve rod of the cryogenic ball valve as claimed in claim 2, wherein: the blowout prevention sleeve (3) is an annular part, a strip-shaped groove is formed in the center of the annular part, the shape of the strip-shaped groove is matched with the shape of a strip-shaped bulge at the tail end of the long valve rod (2), a bulge is arranged on one surface of the blowout prevention sleeve (3), and the shape of the bulge is matched with the shape of the strip-shaped groove in the ball body (1).

4. The anti-blow-out structure of the pin-hole-free extension valve rod of the cryogenic ball valve as claimed in claim 3, wherein: the rear of the long valve rod (2) is provided with a strip-shaped bulge, and the strip-shaped bulge at the tail end of the long valve rod (2) can rotate by rotating the long valve rod (2).

Technical Field

The invention belongs to the field of valves, and particularly relates to a blow-out preventing structure of a low-temperature ball valve pin-hole-free lengthened valve rod.

Background

The existing anti-blowout structure for the lengthened valve rod of the low-temperature ball valve, as shown in figure 1, for the lengthened valve body at the neck part of the whole body, the valve rod cannot be processed into the anti-blowout structure with a shaft shoulder, the valve rod cannot be assembled on the valve body due to the fact that the lengthened valve rod cannot be realized, the valve rod is thickened usually, holes are formed in the valve rod, a shaft sleeve and a pin shaft are installed, but when the anti-blowout step space inside the valve body is small, the strength of the valve rod, the strength of the shaft sleeve and the pin shaft cannot meet the use requirement under the low-temperature working condition, and if the valve rod is thickened, the space of the valve.

Disclosure of Invention

The invention aims to provide a blow-out preventing structure of a low-temperature ball valve pin-hole-free lengthened valve rod, so that the requirement of reducing the manufacturing cost is met.

The invention is realized by the following steps: the utility model provides a structure is prevented blowing off by no pinhole extension valve rod of low temperature ball valve, wherein, includes spheroid, extension valve rod, prevents blowing off the cover, the spheroid setting at the end of extension valve rod, the extension valve rod is connected with the spheroid through preventing blowing off the cover.

The structure is prevented blowing off by no pinhole extension valve rod of low temperature ball valve as above, wherein, the spheroid on open and to have a bar groove, the end of long valve rod is equipped with the bar arch, this bar arch and bar groove shape match.

The low-temperature ball valve pinhole-free lengthened valve rod blowout prevention structure comprises a blowout prevention sleeve, wherein the blowout prevention sleeve is an annular part, a strip-shaped groove is formed in the center of the annular part, the shape of the strip-shaped groove is matched with the shape of a strip-shaped bulge at the tail end of a long valve rod, a bulge is arranged on one surface of the blowout prevention sleeve, and the shape of the bulge is matched with the shape of the strip-shaped groove in a sphere.

According to the low-temperature ball valve pinhole-free lengthened valve rod blowout prevention structure, the annular groove is formed in the back of the strip-shaped protrusion arranged at the tail end of the long valve rod, and the strip-shaped protrusion arranged at the tail end of the long valve rod can rotate by rotating the long valve rod.

The invention has the following remarkable effects: this structure is at former low temperature ball valve area pinhole extension valve rod and prevents the improvement that blows off the structure, utilize low temperature ball valve no pinhole extension valve rod to prevent blowing off the structure, the effectual manufacturing cost who controls the valve, reduced the mould sinking again of valve body, need not to add the thick punching of extension valve rod, need not to increase the valve body and prevent blowing off the inner space, it inserts the clearance cooperation back in the spheroid valve rod groove to utilize to prevent blowing off cover and extension valve rod assembly back rotatory 90 degrees angles, just can realize preventing blowing off, valve manufacturing cost is reduced, application scope is wide.

Drawings

FIG. 1 is a schematic view of an anti-blowout structure of an extended valve stem of a general low-temperature ball valve.

FIG. 2 is a schematic diagram of an anti-blowout structure of an improved pinhole-free extension valve rod of a low-temperature ball valve.

FIGS. 3-5 are schematic views of the ball, elongated stem and blow-out prevention sleeve components

Fig. 6-9 are schematic views of the ball, elongated valve stem and blow-out prevention kit in assembled relation.

In the figure: 1. a ball body, 2, a lengthened valve rod and 3, a blowout prevention sleeve.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

As shown in FIG. 2, the blow-out preventing structure for the pinhole-free lengthened valve rod of the low-temperature ball valve mainly comprises a ball body 1, a lengthened valve rod 2 and a blow-out preventing sleeve 3.

As shown in fig. 2 to 9, first, the valve rod is inserted into the valve body from the upper end of the packing box of the valve body and passes through the blowout prevention sleeve, the valve rod is rotated by 90 degrees to keep the anti-rotation surface of the valve rod flush with the anti-rotation surface of the blowout prevention sleeve, then the ball is loaded into the valve body, the anti-rotation surface of the valve rod is buckled into the ball groove, the valve body cannot be elutriated due to the blowout prevention sleeve being limited by the valve body, and the ball groove and the blowout prevention sleeve limit the displacement of the valve rod, so that the blowout prevention sleeve and the valve rod are prevented from rotating. The shaft shoulder height of the blowout prevention sleeve is short, the blowout prevention space of the valve body can be effectively reduced, and the valve rod does not need to be punched. The low-temperature ball valve pin-hole-free lengthened valve rod has a good anti-blowout structure effect, and can be better suitable for normal-temperature, low-temperature and ultralow-temperature environments.

The foregoing detailed description is intended to be illustrative of the present patent and is not intended to be limiting, since any modifications and variations of the present patent are intended to fall within the spirit and scope of the appended claims.