阅读说明：本技术 一种超高温高压球阀的内外置阀杆防吹出结构 (Structure is prevented blowing off by built-in valve rod in ultra-high temperature high pressure ball valve ) 是由 岳阳 李军业 沈志刚 于 2019-11-19 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超高温高压球阀的内外置阀杆防吹出结构。一种超高温高压球阀的内外置阀杆防吹出结构,包括阀体,在阀体内设置阀杆,阀杆包括设置在阀体内的部分,也包括设置在阀体外的部分,其中阀杆设置在阀体内的部分包括内置防吹出结构,阀杆设置在阀体外的部分包括外置防吹出结构。本发明的显著效果是：利用外置防吹轴套组件与内置防吹轴套组件的组合使用双重防吹出结构,降低阀门扭矩、防止阀杆咬死,提高了阀门使用寿命。(The invention belongs to the field of valves, and particularly relates to an internal and external valve rod blowout prevention structure of an ultrahigh-temperature and high-pressure ball valve. The utility model provides an interior built-in valve rod of ultra-high temperature high pressure ball valve prevents blowing off structure, includes the valve body, sets up the valve rod in the valve body, and the valve rod is including setting up the part in the valve body, also including setting up the part outside the valve body, and wherein the part of valve rod setting in the valve body prevents blowing off the structure including built-in, and the valve rod setting prevents blowing off the structure including external in the part outside the valve body. The invention has the following remarkable effects: the combination of the external blow-proof shaft sleeve component and the internal blow-proof shaft sleeve component is used for realizing a dual blow-out-proof structure, so that the valve torque is reduced, the valve rod is prevented from being seized, and the service life of the valve is prolonged.)

1. The utility model provides an inside and outside valve rod of ultra-high temperature high pressure ball valve prevents blowing out structure which characterized in that: including valve body (1), set up valve rod (8) in valve body (1), valve rod (8) are including setting up the part in valve body (1), also including setting up the part outside valve body (1), and wherein valve rod (8) set up the part in valve body (1) including built-in prevent blowing off the structure, and valve rod (8) set up the part outside valve body (1) including external prevent blowing off the structure.

2. The internal and external valve rod blowout prevention structure of the ultra-high temperature and high pressure ball valve as claimed in claim 1, characterized in that: the built-in anti-blow-out structure comprises a ball body (2), a built-in anti-blow shaft sleeve pin (3) and a built-in anti-blow shaft sleeve (4), wherein the ball body (2) is arranged at the tail end of the valve rod (8), the tail end of the valve rod (8) is wrapped, the built-in anti-blow shaft sleeve (4) wraps the part, close to the tail end, of the valve rod (8), and the built-in anti-blow shaft sleeve (4) is fixed through the built-in anti-blow shaft sleeve pin (3).

3. The internal and external valve rod blowout prevention structure of the ultra-high temperature and high pressure ball valve as claimed in claim 1, characterized in that: the external anti-blowout structure comprises an external anti-blowout shaft sleeve (5), and the part of the valve rod (8) extending out of the valve body (1) is wrapped by the external anti-blowout shaft sleeve (5).

4. The internal and external valve rod blowout prevention structure of the ultra-high temperature and high pressure ball valve as claimed in claim 3, wherein: the external anti-blowout structure further comprises an external anti-blowout shaft sleeve pin (6) and an external shaft pad (7), wherein the external anti-blowout shaft sleeve pin (6) is used for fixing the external anti-blowout shaft sleeve (5), and the external shaft pad (7) is used for buffering.

5. The internal and external valve rod blowout prevention structure of the ultra-high temperature and high pressure ball valve as claimed in claim 3, wherein: the built-in anti-blow-out structure comprises a ball body (2), a built-in anti-blow shaft sleeve pin (3) and a built-in anti-blow shaft sleeve (4), wherein the ball body (2) is arranged at the tail end of the valve rod (8), the tail end of the valve rod (8) is wrapped, the built-in anti-blow shaft sleeve (4) wraps the part, close to the tail end, of the valve rod (8), and the built-in anti-blow shaft sleeve (4) is fixed through the built-in anti-blow shaft sleeve pin (3).

6. The internal and external valve rod blowout prevention structure of the ultra-high temperature and high pressure ball valve as claimed in claim 4, wherein: the built-in anti-blow-out structure comprises a ball body (2), a built-in anti-blow shaft sleeve pin (3) and a built-in anti-blow shaft sleeve (4), wherein the ball body (2) is arranged at the tail end of the valve rod (8), the tail end of the valve rod (8) is wrapped, the built-in anti-blow shaft sleeve (4) wraps the part, close to the tail end, of the valve rod (8), and the built-in anti-blow shaft sleeve (4) is fixed through the built-in anti-blow shaft sleeve pin (3).

7. The internal and external valve rod blowout prevention structure of the ultrahigh-temperature and high-pressure ball valve as claimed in any one of claims 1 to 6, characterized in that: the anti-blowout structure is arranged in the valve body, the shoulder surface of the shaft sleeve is not contacted with the valve body, and a gap of 0.5-1mm is reserved between the shoulder surface of the shaft sleeve and the valve body.

8. The internal and external valve stem blowout prevention structure of the ultra-high temperature and high pressure ball valve as claimed in claim 7, wherein: the built-in anti-blowout structure, the shaft sleeve shoulder surface and the valve body are not contacted, and a gap of 0.51mm is formed between the shaft sleeve shoulder surface and the valve body.

Technical Field

The invention belongs to the field of valves, and particularly relates to an internal and external valve rod blowout prevention structure of an ultrahigh-temperature and high-pressure ball valve.

Background

The existing general ball valve structure only has a built-in blowout prevention structure (refer to a built-in blowout prevention structure in figure 2), and a blowout prevention shaft shoulder and a valve body have the defects of increased friction force, large valve torque, reduced material extrusion stress, possibility of causing high-temperature seizure phenomenon in serious conditions, irrelevant opening and closing of the valve and serious influence on the use safety of a high-temperature and high-pressure system under the high-temperature environment.

Disclosure of Invention

The invention aims to provide an internal and external valve rod blowout prevention structure of an ultrahigh-temperature and high-pressure ball valve, so that the requirements of reducing the torque of the valve, preventing the valve rod from being seized and prolonging the service life of the valve are met.

The invention is realized by the following steps: the utility model provides an interior built-in valve rod of ultra-high temperature high pressure ball valve prevents blowing off structure, includes the valve body, sets up the valve rod in the valve body, and the valve rod is including setting up the part in the valve body, also including setting up the part outside the valve body, and wherein the part of valve rod setting in the valve body prevents blowing off the structure including built-in, and the valve rod setting prevents blowing off the structure including external in the part outside the valve body.

As above, the internal and external valve rod blowout prevention structure of the ultrahigh-temperature and high-pressure ball valve comprises a ball body, an internal blowout prevention shaft sleeve pin and an internal blowout prevention shaft sleeve, wherein the ball body is arranged at the tail end of the valve rod and wraps the tail end of the valve rod, the internal blowout prevention shaft sleeve wraps the part, close to the tail end, of the valve rod, and the internal blowout prevention shaft sleeve is fixed through the internal blowout prevention shaft sleeve pin.

As above, the internal and external valve rod blowout prevention structure of the ultrahigh-temperature and high-pressure ball valve comprises an external blowout prevention shaft sleeve, and the external blowout prevention shaft sleeve wraps the part of the valve rod extending out of the valve body.

The structure is prevented blowing off by the internal and external valve rods of the ultrahigh-temperature and high-pressure ball valve, wherein the external structure also comprises an external anti-blowing shaft sleeve pin and an external shaft pad, the external anti-blowing shaft sleeve pin is used for fixing the external anti-blowing shaft sleeve, and the external shaft pad is used for buffering.

The internal and external valve rod blowout prevention structure of the ultrahigh-temperature and high-pressure ball valve is characterized in that the shaft sleeve shoulder surface and the valve body are not in contact, and a gap of 1mm is formed between the shaft sleeve shoulder surface and the valve body.

The invention has the following remarkable effects: the combination of the external blow-proof shaft sleeve component and the internal blow-proof shaft sleeve component is used for realizing a dual blow-out-proof structure, so that the valve torque is reduced, the valve rod is prevented from being seized, and the service life of the valve is prolonged. Specifically, an internal valve rod blowout prevention structure of an original high-pressure ball valve is improved, an external valve rod blowout prevention structure is added to serve as the 1 st blowout prevention during normal use, the internal valve rod blowout prevention structure serves as an auxiliary safety function, and the increase of valve torque caused by the increase of friction force of the internal blowout prevention structure under high temperature and high pressure is avoided; the abrasion of a built-in blowout prevention structure under high-temperature extrusion stress is avoided, the irrelevant opening and closing accidents of the valve are prevented, and the service life of the valve is effectively prolonged.

Drawings

Fig. 1 is a schematic diagram of an anti-blowout structure of an internal and external valve rod of an ultrahigh-temperature and high-pressure ball valve.

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a schematic structural view of an external blow-out preventing sleeve assembly and an internal blow-out preventing sleeve assembly.

In the figure: 1. the valve comprises a valve body, a ball body 2, an internal anti-blowing shaft sleeve pin 3, an internal anti-blowing shaft sleeve 4, an external anti-blowing shaft sleeve 5, an external anti-blowing shaft sleeve pin 6, an external anti-blowing shaft sleeve pin 7, an external shaft pad 8 and a valve rod.

Detailed Description

As shown in fig. 3, the external blowing-proof shaft sleeve assembly and the internal blowing-proof shaft sleeve assembly are schematically structured. The external blowing-proof shaft sleeve component plays a main role, and the internal blowing-proof shaft sleeve component is combined to play an auxiliary role. It should be noted that the built-in anti-blowing shaft sleeve assembly is combined, the shoulder surface of the shaft sleeve is not contacted with the valve body, and a gap of 1mm is required after assembly, so that high-temperature friction is prevented. Because the friction increases and the extrusion stress reduces under the high temperature, can lead to valve moment of torsion to increase and accelerate the axle sleeve wearing and tearing, can appear the valve rod serious and sting the phenomenon. Therefore under normal use, the blow-out prevention of the valve rod of the ball valve is borne by the external blow-out prevention shaft sleeve assembly, so that the friction force of the valve rod can be converted into the position with lower external temperature, and the static friction is changed into sliding friction under the action of the external shaft pad, so that the friction coefficient is effectively reduced. When the external blow-proof is invalid, the built-in blow-proof shaft sleeve component assembly can play a role. The internal and external valve rod blowout prevention structure has a better effect, and can be better suitable for high-temperature and high-pressure-difference environments.

Specifically, the ball valve is a dual anti-blowout structure formed by combining an external anti-blowout shaft sleeve assembly and an internal anti-blowout shaft sleeve assembly, and the structure is shown in fig. 1. The first external anti-blowing shaft sleeve assembly is located outside the valve body and is far away from the influence of a high-temperature medium, the friction force of an anti-blowing shaft shoulder and the support can be reduced, the second internal anti-blowing shaft sleeve assembly is located inside the valve body and is in contact with the medium, however, due to the limitation of the external anti-blowing shaft sleeve, the internal shaft shoulder surface of the second external anti-blowing shaft sleeve does not contact with the valve body, a 1mm gap exists, high-temperature friction does not exist, and only the 2 nd layer anti-blowing protection under an accident is achieved. The combination of the external blow-proof shaft sleeve component and the internal blow-proof shaft sleeve component adopts a dual blow-proof structure, so that the irrelevant opening and closing accidents of the high-temperature high-pressure ball valve are effectively prevented, and the service life of the valve is prolonged

The utility model provides an inside and outside valve rod of ultrahigh temperature high pressure ball valve prevents blowing out structure, wherein lies in that the ball valve uses dual structure of preventing blowing out for the combination of external axle sleeve subassembly of preventing blowing with built-in axle sleeve subassembly of preventing blowing. The external blowing-proof shaft sleeve component plays a main role, and the internal blowing-proof shaft sleeve component is combined to play an auxiliary role.

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.