Valve gear box sealing structure with waterproof cover

Abstract

The utility model belongs to the field of mechanical sealing and protection, and particularly relates to a valve gear box sealing structure with a waterproof cover, which comprises a gear box, a shaft sleeve, a valve cover and the waterproof cover, an O-shaped ring is arranged on a gear box body, the shaft sleeve is positioned at the top of the gear box, the valve cover is in threaded connection above the shaft sleeve, and the waterproof cover covers the periphery of the shaft sleeve and the valve cover. The motor is connected with the top of the gearbox; a boss is arranged in the center of the inner surface of the valve deck, and an O-shaped sealing ring is arranged on the periphery of the boss in a cushioned mode. The water inlet phenomenon of the movable shaft sleeve of the ball valve gear box is effectively solved, and long-period stable fault-free operation of the gear box is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical seal and protection field, concretely relates to a valve gear box sealing structure with waterproof cover. BACKGROUND

[0002] The natural gas transmission station ball valve gear box valve rod transmission shaft part needs to rotate frequently, the gear box and the ball valve rod adopt key connection, the worm drives the sector gear to drive the gear box shaft sleeve to move 90 degrees, however, in the use process, the gear box shaft sleeve sealing failure causes the box to enter water, light causes the valve to not move normally, heavy even causes the gear box to be damaged, influences the gas transmission safety production. The traditional gear box shaft sleeve relies on single static sealing (such as O-ring), and the frequent rotating action causes the sealing element to wear, and rainwater is easy to penetrate into the box. SUMMARY

[0003] The utility model discloses a valve gear box sealing structure with waterproof cover, which optimizes the magnetic attraction type external protective cover and internal sealing structure, and solves the problem of easy water entry of the conventional gear box shaft sleeve.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A valve gear box sealing structure with waterproof cover, comprising a gear box, a shaft sleeve, a valve cover and a waterproof cover, the gear box body is provided with an O-ring, the shaft sleeve is located at the top of the gear box, the valve cover is threadedly connected above the shaft sleeve, the waterproof cover is covered on the outer periphery of the shaft sleeve and the valve cover, and is connected with the top of the gear box.

[0006] A boss is arranged at the center of the inner surface of the valve cover, and an O-ring is arranged on the outer periphery of the boss.

[0007] Further, the waterproof cover edge is uniformly distributed with a plurality of magnetic strips for adsorption between the gear box top.

[0008] Further, a sealing strip is arranged between the contact surface of the waterproof cover and the gear box.

[0009] Further, the waterproof cover is externally attached with a light storage type state indicating mark.

[0010] The utility model has the advantages of the following:

[0011] The utility model provides a device of magnetic attraction waterproof cover adds internal sealing cooperation optimization, increases the boss structure, reduces friction loss, increases O type ring seal, increases magnetic attraction type waterproof cover, through waterproof cover edge even distribution's mutual embedding magnetic strip fast adsorption in gear box top, external waterproof seal adopts cover body and gear box contact surface processing seal groove, waterproof cover outer pastes light storage type state indication mark, daytime through natural light source energy storage, release visible light indication valve state at night, promote night operation safety, realize double protection, prolong gear box life, guarantee safety production, effectively solved the ball valve gear box dynamic shaft sleeve water phenomenon, guarantee gear box long period stable trouble -free operation. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structural schematic diagram of separating for this device.

[0013] Figure 2 It is waterproof cover plane structure schematic diagram.

[0014] Figure 3 It is waterproof cover solid structure schematic diagram.

[0015] In the drawing, 1-shaft sleeve, 2-valve cover, 3-waterproof cover, 4-boss, 5-O type sealing ring, 6-magnetic strip, 7-sealing strip, 8-light storage type state indication mark. DETAILED DESCRIPTION

[0016] The following will be described in detail to the exemplary embodiment, its example shows in the drawing. The following exemplary embodiments described in the embodiment does not represent all the embodiments consistent with the utility model. Instead, they are only examples consistent with some aspects of the utility model detailed in the appended claims.

[0017] As Figure 1 Shown, a valve gear box sealing structure with waterproof cover, including gear box, shaft sleeve 1, valve cover 2, gear box body is equipped with O type ring, shaft sleeve 1 is located at the top of gear box, valve cover 2 is set in the upper of shaft sleeve 1, through threaded connection, the inner surface center of valve cover is provided with a boss 4, and the outer periphery of boss 4 is provided with an O type sealing ring 5.

[0018] O type sealing ring 5: adopt fluorine rubber O ring (temperature -30 ℃ ~ 150 ℃), dynamic sealing ring number increases to 2.

[0019] As Figure 2 Shown, the utility model still includes a waterproof cover 3, for cover and set in the outer periphery of shaft sleeve 1 and valve cover 2, the waterproof cover 3 edge even distribution has a plurality of magnetic strips 6, for with gear box top between adsorption, waterproof cover 3 and gear box contact surface between being equipped with sealing strip 7, waterproof cover 3 outer surface pastes light storage type state indication mark 8.

[0020] Waterproof cover 3: acrylic material, through the waterproof cover 3 edge evenly distributed by embedded magnetic strip 6 (magnetic force is greater than or equal to 50N) fast adsorption on the top of the gearbox, the outer waterproof seal adopts the sealing groove processing contact surface of the cover and the gearbox, and the sealing strip 7 is formed by special waterproof sealing material pressure type waterproof structure.

[0021] It should be understood that the present application is not limited to the above described and can be various modifications and changes without departing from its scope. The scope of the present application is limited only by the appended claims.

Claims

1. A valve gear box seal structure with a water shield, characterized by: It includes gear box, shaft sleeve (1), valve cover (2) and waterproof cover (3), the gear box body is equipped with O ring, the shaft sleeve (1) is located at the top of the gear box, the valve cover (2) is threadedly connected above the shaft sleeve (1), the waterproof cover (3) covers the outer periphery of the shaft sleeve (1) and the valve cover (2), and is connected with the top of the gear box; The inner surface of the valve cover (2) is provided with a boss (4) at the center, and the outer periphery of the boss (4) is provided with an O-shaped sealing ring (5).

2. The valve gear case sealing structure with a waterproof cover according to claim 1, characterized in that: The waterproof cover (3) is uniformly provided with a plurality of magnetic strips (6) on the edge, which is used for adsorption between the top of the gear box.

3. The valve gear case sealing structure with a waterproof cover according to claim 2, characterized in that: The waterproof cover (3) is provided with a sealing strip (7) between the contact surface of the waterproof cover (3) and the gear box.

4. The valve gear case sealing structure with a waterproof cover according to claim 3, characterized in that: The waterproof cover (3) is externally attached with a light storage type state indicating mark (8).

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