CN201028006Y - Disc valves - Google Patents

Abstract

The utility model discloses a butterfly valve which comprises a valve body, a cover plate, a valve stem and a valve plate, wherein, the valve stem is connected with the valve plate; a flexible valve housing is arranged between the valve body and the valve plate; a radial valve stem hole is arranged on the valve housing; the valve stem passes through the valve stem hole; ring convex ribs banded on the periphery of the valve stem are arranged on the internal wall of the valve stem hole of the valve housing; a ring dovetail is arranged on the internal wall of an axial through hole of the valve body; a ring dovetail groove is arranged on an excircle of the valve housing; the ring dovetail of the valve body is embedded into the ring dovetail groove of the valve housing; ring seal flanges are arranged on end faces of both sides of the valve housing; a surface convex stand is arranged on a position where the end face of the dovetail groove of the valve housing is located on the valve stem hole; a surface convex stand is arranged on the valve stem hole of the internal wall of the valve housing; a limit pin is arranged on the valve stem; a limit groove is arranged on the cover plate or the valve body; one end of the limit pin extends into the limit groove; a seal slot is arranged on the valve stem; O-shaped seal rings are arranged inside the seal slot. The utility model has the advantages of good sealing property, simple structure, and free opening and closure.

Description

The dish valve

Technical field

The utility model relates to the used dish valve of a kind of dish valve, particularly transformer.

Background technique

At present, for the used dish valve of transformer, because sealing requirements height, in order to reach desirable sealing effect, generally all can only exchange sealability for the means that improve the element precision grade, thereby the cost of production height, yet owing to be rigid seal between valve body and the valve block, even how to improve the part precision grade again, still have small leakage during folding.In addition,, after closing, open very difficultly again, even the phenomenon that the switch out handle is not still opened can take place, if valve rod is that riveted type is connected with valve block, then increased leakage point, so be easy to leakage because the folding part pays to being rigidly connected.Because therefore poor sealing performance can not vacuumize when debugging or keep in repair with main frame smoothly, causes inconvenient maintenance.Though though the dish valve that has improves, on the valve block external diameter, added the O RunddichtringO, having improved sealability and to have vacuumized performance, but still existed defectives such as O type circle slippage in use and working life is short.

Summary of the invention

Technical problem to be solved in the utility model is that a kind of good seal performance, simple in structure, folding dish valve freely are provided.

The technical solution of the utility model is, a kind of dish valve comprises valve body, cover plate, valve rod and valve block, and valve rod and valve block load are equipped with flexible valve pocket between valve body and valve block, and valve pocket is provided with valve rod hole radially, and valve rod passes valve rod hole; The valve rod hole inwall of valve pocket is provided with ring-like convex tendon, and ring-like convex tendon banding is in the valve rod periphery; Ring-like dovetail is arranged on the inwall of the axial hole of valve body, ring-like dovetail groove is arranged on the valve pocket cylindrical; The ring-like dovetail of valve body is inlaid in the ring-like dovetail groove of valve pocket; On the both sides end face of valve pocket ring-like sealing flange is arranged; The dovetail groove bottom surface of valve pocket is positioned at the valve rod hole place and has the plane boss, and the valve rod hole place of valve sleeving inner wall has the plane boss; Valve rod is provided with position limit pin, and cover plate is provided with restraining groove, and an end of position limit pin stretches in the restraining groove on the cover plate; Or valve rod is provided with position limit pin, and valve body is provided with restraining groove, and an end of position limit pin stretches in the restraining groove on the valve body; Seal groove is arranged on the valve rod, the O RunddichtringO is installed in the seal groove.

After adopting said structure, because flexible valve pocket is installed between valve body and valve block, valve pocket is provided with valve rod hole radially, valve rod passes valve rod hole, therefore, with the valve body of prior art and the rigid seal between the valve block, change into the flexible sealing between valve body and flexible valve pocket and the valve block, good seal performance; Owing to increased valve pocket, make the requirement on machining accuracy of valve body and valve block not high, structure is also simple, and folding is freely during use.And have valve pocket and be difficult for slippage, the characteristics of high life.

Description of drawings

Fig. 1 is the structural representation of dish valve of the present utility model;

Fig. 2 be Fig. 1 along A-A to sectional view;

Fig. 3 is the structural representation of the valve pocket in the utility model;

Fig. 4 be Fig. 3 along B-B to sectional view;

Fig. 5 be Fig. 4 along C-C to sectional view;

Fig. 6 be Fig. 3 along F-F to sectional view;

Fig. 7 is the partial enlarged drawing of the I portion of Fig. 4;

Fig. 8 be Fig. 1 along D-D to sectional view;

Fig. 9 is the structural representation of the utility model when establishing restraining groove on valve body;

Figure 10 be Fig. 9 along E-E to sectional view.

Embodiment

Below contrast accompanying drawing,, the utility model made further specifying by the description of embodiment.

Shown in Fig. 1,2,3,4,5,6, a kind of dish valve comprises valve body 1, cover plate 2, valve rod 6 and valve block 9, valve rod 6 and valve block 9 loads, flexible valve pocket 8 is installed between valve body 1 and valve block 9, and valve pocket 8 is provided with valve rod hole 8-1 radially, and valve rod 6 passes valve rod hole 8-1.

Shown in Fig. 2,4,5, the valve rod hole 8-1 inwall of valve pocket 8 is provided with ring-like convex tendon 8-1-1, ring-like convex tendon 8-1-1 banding is in valve rod 6 peripheries, good like this guaranteed valve rod 6 be contained in and valve rod hole 8-1 between sealing.

Ring-like dovetail 1-1 is arranged on the inwall of the axial hole of valve body 1 shown in Fig. 2,4,6, ring-like dovetail groove 8-2 is arranged on valve pocket 8 cylindricals; The ring-like dovetail 1-1 of valve body 1 is inlaid in the ring-like dovetail groove 8-2 of valve pocket 8, can certainly make valve pocket 8 link to each other with valve body 1 with other Placements such as rectangle grooves.

Shown in Fig. 2,3,4,6,7,, ring-like sealing flange 8-3 is arranged on the bi-side of valve pocket 8 in order effectively to guarantee being connected between valve pocket 8 and the flange that links to each other.

Shown in Fig. 4,5,6, the dovetail groove 8-2 bottom surface of valve pocket 8 is positioned at valve rod hole 8-1 place and has plane boss 8-5, and the valve rod hole 8-1 place of valve pocket 8 inwalls has plane boss 8-4; Make the better tightness of valve pocket 8.

Shown in Fig. 1,2,8, valve rod 6 is provided with position limit pin 4, and cover plate 2 is provided with restraining groove 3, and an end of position limit pin 4 stretches in the restraining groove 3 on the cover plate 2; Because stretching into, the position limit pin 4 on the valve rod 6 can make valve rod 6 in the restraining groove 3 like this at axial limiting, and restraining groove 3 is to be the left and right sides, 90 ° of angles sector structure, the rotation angle of valve rod also can only be rotated in the fan section by the spacing of position limit pin 4, has played the angle position-limiting action.Shown in Fig. 9,10, also can will on valve rod 6, be provided with position limit pin 4 certainly, valve body 1 is provided with restraining groove 3, and an end of position limit pin 4 stretches in the restraining groove 3 on the valve body 1 and reaches spacing purpose; Switching structure is hidden and simpler and more direct when making work like this.

As shown in Figure 1, seal groove 6-1 is arranged on the valve rod 6, O RunddichtringO 7 is installed among the seal groove 6-1.So just guaranteed that the dish valve can reach good sealing effect in use fully.

Shown in Fig. 1～10, the utility model in use, during as the needs throttle down, at this moment handle 5 is pulled (about 90 ° of angles) as clockwise direction pulls moment that handle 5 produces and is connected with the square body axle on valve rod 6 tops by handle 5 square holes and passes to valve rod 6, valve rod 6 drives valve block 9 and rotates together, valve closing plays the effect of damming the most at last.At this moment the position limit pin 4 on the valve rod 6 is done rotatablely moving about 90 ° of angles synchronously.Angle is spacing to be to realize by the restraining groove 3 in cover plate 2 or the valve body 1; Then handle 5 is made counterclockwise 90 ° of angle left rotation and right rotation during unlatching, working procedure is consistent when closing.

Because when opening, the dish valve needs be the valve body end face with and stem shaft to sealing, end face seal is that three ring-like sealing flange 8-3 by valve pocket 8 two ends are connected to form hydrostatic seal with piping flange, and valve rod axial seal is then cooperated with valve rod hole work on the valve body 1 by the O RunddichtringO 7 on the valve rod 6 to be finished.Except the sealing of above-mentioned two aspects (axially, end face), increased radial seal when closing, i.e. the sealing of 8 of valve block 9 and valve pockets.Because adopted the structure of the comprehensive flexible sealing of stereoscopic three-dimensional, therefore can bear actual conditions more than 10 times pressure and do not leak.

Claims (8)

1. dish valve, comprise valve body (1), cover plate (2), valve rod (6) and valve block (9), valve rod (6) and valve block (9) load, it is characterized in that: between valve body (1) and valve block (9), flexible valve pocket (8) is installed, valve pocket (8) is provided with valve rod hole (8-1) radially, and valve rod (6) passes valve rod hole (8-1).

2. dish valve according to claim 1 is characterized in that: valve rod hole (8-1) inwall of valve pocket (8) is provided with ring-like convex tendon (8-1-1), and ring-like convex tendon (8-1-1) banding is in valve rod (6) periphery.

3. dish valve according to claim 1 and 2 is characterized in that: ring-like dovetail (1-1) is arranged on the inwall of the axial hole of valve body (1), on valve pocket (8) cylindrical ring-like dovetail groove (8-2) is arranged; The ring-like dovetail (1-1) of valve body (1) is inlaid in the ring-like dovetail groove (8-2) of valve pocket (8).

4. dish valve according to claim 1 and 2 is characterized in that: ring-like sealing flange (8-3) is arranged on the both sides end face of valve pocket (8).

5. dish valve according to claim 3 is characterized in that: dovetail groove (8-2) bottom surface of valve pocket (8) is positioned at valve rod hole (8-1) and locates to have plane boss (8-5), and the valve rod hole (8-1) of valve pocket (8) inwall locates to have plane boss (8-4).

6. dish valve according to claim 1 is characterized in that: valve rod (6) is provided with position limit pin (4), and cover plate (2) is provided with restraining groove (3), and an end of position limit pin (4) stretches in the restraining groove (3) on the cover plate (2).

7. dish valve according to claim 1 is characterized in that: valve rod (6) is provided with position limit pin (4), and valve body (1) is provided with restraining groove (4), and an end of position limit pin (4) stretches in the restraining groove (3) on the valve body (1).

8. dish valve according to claim 1 is characterized in that: seal groove (6-1) is arranged on the valve rod (6), O RunddichtringO (7) is installed in the seal groove (6-1).

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