阅读说明：本技术 一种双密封球阀 (Double-seal ball valve ) 是由 洪元生 于 2018-07-24 设计创作，主要内容包括：本发明公开了一种双密封球阀,包括：阀体,与阀体依次连接的上密封座、上阀杆和下阀杆,在阀体的中腔内设置有球体；其中,在球体的上下两端均设有阀杆孔,球体通过利用上阀杆和下阀杆穿入阀杆孔内来使其固定到阀体内；在球体的上下端球面与上阀杆和下阀杆之间设有轨道盘座面,在轨道盘座面上设置有若干螺丝孔,轨道盘通过螺钉紧固到球体上的轨道盘座面上。本发明通过在球体的两端各设有主阀座和一个副阀座,开关过程中主阀座与球面分离不摩擦,副阀座采用硬密封形式与球面摩擦有效刮除了球面上的杂质,起到了高清洁球面保护主密封的作用和副密封作用,使主密封起到绝对可靠的密封作用和提高使用寿命的作用,具有密封性好、寿命长、抗老化的特点。(The invention discloses a double-seal ball valve, which comprises: the valve body is sequentially connected with an upper sealing seat, an upper valve rod and a lower valve rod, and a ball body is arranged in a middle cavity of the valve body; wherein, the upper and lower ends of the ball body are provided with valve rod holes, and the ball body is fixed in the valve body by penetrating the upper valve rod and the lower valve rod into the valve rod holes; a track disc seat surface is arranged between the spherical surface at the upper end and the lower end of the sphere and the upper valve rod and the lower valve rod, a plurality of screw holes are formed in the track disc seat surface, and the track disc is fastened to the track disc seat surface on the sphere through screws. The main valve seat and the auxiliary valve seat are respectively arranged at the two ends of the sphere, the main valve seat is separated from the spherical surface and does not rub in the opening and closing process, the auxiliary valve seat rubs with the spherical surface in a hard sealing mode to effectively scrape impurities on the spherical surface, the effect of protecting the main seal by the high-cleanness spherical surface and the effect of auxiliary seal are achieved, the main seal plays an absolutely reliable sealing effect and the effect of prolonging the service life, and the spherical ball valve has the characteristics of good sealing performance, long service life and ageing resistance.)

1. A dual seal ball valve comprising: the valve comprises a valve body (1), an upper sealing seat (2), an upper valve rod (3) and a lower valve rod (4) which are sequentially connected with the valve body (1), wherein a ball body (5) is arranged in a middle cavity of the valve body (1); wherein, the upper end and the lower end of the sphere (5) are provided with valve rod holes (51), and the sphere (5) is fixed in the valve body (1) by utilizing the upper valve rod (3) and the lower valve rod (4) to penetrate into the valve rod holes (51); a track disc seat surface (52) is arranged between the spherical surface of the upper end and the lower end of the sphere (5) and between the upper valve rod (3) and the lower valve rod (4), a plurality of screw holes (53) are arranged on the track disc seat surface (52), and the track disc (6) of the valve body (1) is fastened on the track disc seat surface (52) on the sphere (5) through screws (7); it is characterized by also comprising: a main valve seat (8) and an auxiliary valve seat (9) are arranged between the valve body (1) and the ball body (5); a track abutting surface (81) is arranged on the main valve seat (8) close to the edge of the ball body (5), and when the ball body (5) rotates, the track abutting surface (81) and the track disc (6) are in contact with each other or separated from each other.

2. Double-sealed ball valve according to claim 1, characterized in that said upper sealing seat (2) is screwed on said valve body (1) by means of internal screws (7).

3. Double seal ball valve according to claim 1, characterized in that between the main valve seat (8) and the ball (5) there are provided a main seal (10), an auxiliary seal (11) and a spring (12).

4. Double-seal ball valve according to claim 1, characterized in that sealing rings (13) are provided inside the main valve seat (8) and between the ball (5) and the valve body flow opening; an auxiliary sealing ring (14), a spring (12), a gasket (15) and a sealing ring (13) are arranged between the auxiliary valve seat (9) and the ball body (5).

5. Double seal ball valve according to claim 1, characterized in that a lower valve cover (41) is provided at the bottom cover of the lower valve stem (4).

Technical Field

The invention relates to the technical field of valves, in particular to a double-seal ball valve.

Background

The existing fixed ball valve is characterized in that a ball body is arranged in a middle cavity of a valve body, an upper valve rod and a lower valve rod are fixedly connected with the valve body, sealing rings are respectively arranged at two ends of the ball body, the ball body is tightly attached to a spherical surface for sealing, leakage can occur due to scratching of impurities, the sealing is not reliable enough, a valve seat and the spherical surface are abraded due to friction in the opening and closing process, and the service life is shortened.

Therefore, how to provide a double-seal ball valve with the characteristics of good sealing performance, long service life and aging resistance is a problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of the above, the invention provides a double-seal ball valve with the characteristics of good sealing performance, long service life and aging resistance.

In order to achieve the purpose, the invention provides the following technical scheme:

a dual seal ball valve comprising: the valve comprises a valve body, an upper sealing seat, an upper valve rod and a lower valve rod which are sequentially connected with the valve body, wherein a ball body is arranged in a middle cavity of the valve body; the upper end and the lower end of the ball body are provided with valve rod holes, and the ball body is fixed in the valve body by penetrating an upper valve rod and a lower valve rod into the valve rod holes; a track disc seat surface is arranged between the upper end spherical surface and the lower end spherical surface of the sphere and the upper valve rod and the lower valve rod, a plurality of screw holes are arranged on the track disc seat surface, and the track disc is fastened on the track disc seat surface on the sphere through screws; it is characterized by also comprising: a main valve seat and an auxiliary valve seat are sequentially arranged between the valve body and the ball body; the main valve seat is provided with a track butt joint surface close to the edge of the ball body, and when the ball body rotates, the track butt joint surface and the track disc are contacted or separated from each other.

Preferably, in the double-seal ball valve, the upper seal seat is fixed to the valve body by internal screw tightening.

Preferably, in the above-mentioned double-seal ball valve, a main seal ring, an auxiliary seal ring and a spring are provided between the main valve seat and the ball body.

Preferably, in the above-mentioned double-seal ball valve, a seal ring is provided inside the main valve seat and between the ball body and the valve body flow passage port; and an auxiliary sealing ring, a spring, a gasket and a sealing ring are arranged between the auxiliary valve seat and the ball body.

Preferably, in the double-seal ball valve, a lower valve cover is arranged at the bottom cover of the lower valve rod.

Through the technical scheme, compared with the prior art, the double-seal ball valve is provided with the main valve seat and the auxiliary valve seat at two ends of the ball body respectively, the auxiliary valve seat is always attached to the surface of the ball body in the rotating process of the switch, impurities on the spherical surface can be scraped, the auxiliary valve seat is attached to the spherical surface and sealed when the switch is in place, the impurity scraping function can be achieved, the sealing function can be achieved, the main valve seat is separated from the spherical surface under the pushing action of the track disc in the opening and closing processes, the main valve seat is attached to the spherical surface and sealed only in the full-opening and full-closing state, the auxiliary valve seat scrapes impurities on the surface of the ball body in the full-closing process, the main valve seat is not scratched when contacting the spherical valve seat again, and therefore under the protection force of the auxiliary valve seat and the special track opening and closing function of the main valve seat, the main valve seat is not only, the sealing reliability and the service life of the main valve seat are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of the invention.

FIG. 2 is a partial enlarged view of the drawing A-1 of the present invention.

Figure 3 is a front view of the sphere of the present invention.

Figure 4 is a top view of the sphere of the present invention.

Fig. 5 is a front view of the main valve seat of the present invention.

Fig. 6 is a rear view of the main valve seat of the present invention.

FIG. 7 is a cross-sectional view of the main valve seat of the present invention.

FIG. 8 is a front view of the auxiliary valve seat of the present invention.

FIG. 9 is a rear view of the secondary valve seat of the present invention.

FIG. 10 is a cross-sectional view of the auxiliary valve seat of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.

The embodiment of the invention discloses a double-seal ball valve which has the characteristics of good sealing performance, long service life and ageing resistance.

Referring to the attached drawings, the invention discloses a double-seal ball valve, which specifically comprises:

the valve comprises a valve body 1, an upper sealing seat 2, an upper valve rod 3 and a lower valve rod 4 which are sequentially connected with the valve body 1, wherein a ball body 5 is arranged in a middle cavity of the valve body 1; wherein, the upper and lower both ends of said spheroid 5 have valve stem hole 51, said spheroid 5 make it fix to valve block 1 through utilizing upper valve stem 3 and lower valve stem 4 to penetrate in the valve stem hole 51; a track disc seat surface 52 is arranged between the upper end surface and the lower end surface of the ball body 5 and between the upper valve rod 3 and the lower valve rod 4, a plurality of screw holes 53 are arranged on the track disc seat surface 52, and the track disc 6 of the valve body 1 is fastened on the track disc seat surface 52 on the ball body 5 through screws 7; it is characterized by also comprising: a main valve seat 8 and an auxiliary valve seat 9 are arranged between the valve body 1 and the ball body 5; a rail abutment surface 81 is provided on the main valve seat 8 near the edge of the ball 5, and the rail abutment surface 81 and the rail disk 6 are in contact with or separated from each other when the ball 5 rotates.

In order to further optimize the above technical solution, the upper sealing seat 2 is screwed and fixed on the valve body 1 by the internal screw 7.

In order to further optimize the above solution, a main seal 10, an auxiliary seal 11 and a spring 12 are provided between the main valve seat 8 and the ball 5.

In order to further optimize the technical scheme, sealing rings 13 are arranged on the inner side of the main valve seat 8 and between the ball 5 and the valve body flow passage opening.

In order to further optimize the technical scheme, an auxiliary sealing ring 14 is arranged between the auxiliary valve seat 9 and the ball body 5 to play a role in sealing and scraping impurities on the surface of the ball body; a spring 12 is arranged on the back surface of the auxiliary valve seat 9 to push the auxiliary valve seat 9 to be tightly attached to the spherical surface, and a gasket 15 and a sealing ring 13 are arranged behind the spring 12.

In order to further optimize the above technical solution, a lower valve cap 41 is covered at the bottom of the lower valve rod 4.

In order to further optimize the technical scheme, a ball body is arranged in the middle cavity of the valve body, the upper end and the lower end of the ball body are connected to the valve body through an upper valve rod and a lower valve rod, the upper valve rod and the lower valve rod are cylindrical, so that the friction coefficient between the ball body and the lower valve rod during rotation can be reduced, the lower end of the upper valve rod is fixedly connected with the ball body, and the upper end of the upper valve rod is fixedly connected with an execution mechanism to control the rotary main path opening and closing or adjusting of the ball.

In order to further optimize the technical scheme, a track disc seat surface is arranged between the spherical surface and the valve rod, the upper track disc and the lower track disc are fixed on the upper track disc seat surface and the lower track disc seat surface through screws, and the track disc drives the main valve seat to be separated and combined.

In order to further optimize the technical scheme, the valve body middle cavity is provided with a plane ball body, the upper end and the lower end of the ball body are provided with an upper valve rod hole and a lower valve rod hole, the ball body penetrates through the upper valve rod hole and the lower valve rod hole to fixedly support the lower valve rod to be cylindrical, the smoothness is good, the valve body and the lower valve rod can rotate in different axial directions at will, the part of the upper valve rod inserted into the ball body polygonal hole is a polygonal main body, and the stability of connection between the ball body and the valve rod is facilitated to drive the opening and closing or the stroke adjustment of the ball.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.