CN202001723U - Anti-rush out/pouring sealing mechanism for valve rod - Google Patents

Abstract

The utility model discloses an anti-rush out/pouring sealing mechanism for a valve rod, which relates to the technical field of manufacturing of valves. The anti-rush out/pouring sealing mechanism comprises a valve body and a valve rod, wherein the valve rod is arranged in the valve body; an annular bump is arranged on the valve rod in the radial direction; the inner side wall of the valve body is provided with an annular groove which is matched with the annular bump; the annular bump is arranged in the annular groove; a sealing ring is arranged between the upper end of the annular bump and the valve body; the upper part of the valve body is provided with a step; a baffle ring is arranged in the step; the upper end of the valve rod is inserted into a through hole on the middle part of the baffle ring; the upper end of the valve rod is provided with a screw thread; the screw thread at the upper end of the valve rod is connected with a nut; and the nut is arranged above the baffle ring. By adopting the mechanism, leakage caused by loosening of a valve rod filler after a valve is used for a long time can be avoided, the filler can be replaced under the pressure of the valve, and loosening and rush out of the valve are avoided.

Description

Valve rod is prevented going out, back seal mechanism

Technical field

The utility model relates to a kind of manufacturing technology field of valve.

Background technique

Existing dish valve, ball valve, stopcock etc. partly turn round open-close type valve, its valve rod close arrangement is in described valve body, valve rod is an even straight-bar, after valve uses for a long time, and the valve rod appearance is loosening, promptly can cause leakage, under the pressure condition with higher, valve rod can be rushed out, if the valve that applies on the industrial chemicals of high pollution leaks, then can cause large-scale harm.

Summary of the invention

The utility model provides that a kind of valve rod anti-is gone out, back seal mechanism, and purpose is to solve existing valve and uses the back filler easily to leak for a long time, under the high-pressure situations, and the defective that valve rod is easily gone out.

The utility model comprises valve body, valve rod, described valve rod is arranged in the described valve body, on described valve rod, be disposed radially the projection of going in ring, the annular recess that cooperates with the projection of going in ring is set on the madial wall of described valve body, described belt projection arrangements is in described annular recess, between the upper end of described belt projection and valve body, seal ring is set, top at described valve body is provided with step, in described step, baffle ring is set, the upper end of described valve rod is set in the through hole at described baffle ring middle part, upper end at described valve rod is provided with screw thread, the upper end screw thread attaching nut of described valve rod, and described nut arrangements is above described baffle ring.

The utility model is provided with the projection of going in ring on valve rod, belt projection is engaged in the valve body madial wall annular recess is set, this set can prevent that valve rod from going out, between belt protruding upper end and valve body, seal ring is set, adopt this back seal, can better prevent to leak, the screw thread and the nut of valve rod upper end are engaged on the valve body, this set is for the adjustment to valve rod, so that go in ring protruding cooperate with valve body tightr; After this mechanism can avoid the long-time use of valve, the loosening leakage that causes of stem packing, and can under valve band pressure situation, change filler, and avoid valve rod to become flexible and go out.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model.

Among the figure, 1, valve body, 2, valve rod, 3, the projection of going in ring, 4, annular recess, 5, seal ring, 6, nut, 7, baffle ring.

Embodiment

As described in Figure 1, this valve rod is anti-to be gone out, back seal mechanism, comprise valve body 1, valve rod 2, valve rod 2 is arranged in the valve body 1, on valve rod 2, be disposed radially the projection 3 of going in ring, on the madial wall of valve body 1, be provided with and projection 3 annular recess that cooperate 4 of going in ring, the projection 3 of going in ring is arranged in the described annular recess 4, between belt protruding 3 upper end and valve body, seal ring 5 is set, step is set, baffle ring 7 is set in step on the top of valve body 1, the upper end of valve rod 2 is set in the through hole at baffle ring 7 middle parts, upper end at valve rod 2 is provided with screw thread, the upper end screw thread attaching nut 6 of valve rod 2, and nut 6 is arranged in the top of described baffle ring 7.

Claims (1)

1. valve rod is anti-goes out, back seal mechanism, comprise valve body, valve rod, described valve rod is arranged in the described valve body, it is characterized in that on described valve rod, being disposed radially the projection of going in ring, the annular recess that cooperates with the projection of going in ring is set on the madial wall of described valve body, described belt projection arrangements is in described annular recess, between the upper end of described belt projection and valve body, seal ring is set, top at described valve body is provided with step, in described step baffle ring is set, the upper end of described valve rod is set in the through hole at described baffle ring middle part, in the upper end of described valve rod screw thread is set, the upper end screw thread attaching nut of described valve rod, described nut arrangements is above described baffle ring.

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