CN212839682U - Waterproof type valve gear box - Google Patents

Abstract

The utility model discloses a waterproof type valve gear case, including built-in box, hand wheel, case lid and the top cap that has transmission structure, the lower surface of top cap and case lid contact is provided with the recess, is provided with waterproof packing ring in the recess. The groove is provided with two channels. The lower surface that top cap and case lid contacted is provided with annular boss, and the recess setting is on annular boss's surface. A waterproof pad is arranged between the box body and the box cover; the inner cavity of the box body is filled with lithium-based lubricating grease. An arrow-shaped valve position indicator is arranged on the upper surface of the top cover. The utility model discloses have better waterproof nature, rainwater when can effectively preventing the outdoor use makes iron spare part corrosion in entering into valve gear box's the box to the maintenance frequency of valve gear box has been reduced, labour saving and time saving, and the life of equipment has been improved. Meanwhile, the lubricating grease has better water resistance, and even if a small amount of water enters the box body, the lubricating grease is not easy to emulsify and deteriorate, so that the excellent lubricating performance is ensured.

Description

Waterproof type valve gear box

Technical Field

The invention relates to a valve gear box, in particular to a valve gear box with high waterproofness.

Background

The valve gear box is a common facility for driving a valve in large-scale pipeline engineering and mainly comprises a box body, a hand wheel, a box cover, a top cover and the like, wherein a gear pair or a worm gear pair is arranged in the box body. The advantages are that: the mechanical transmission structure enables the opening and closing of the valve to be more controllable and reliable, and can bear larger working pressure. The disadvantages are that: the sealing performance is poor, and the box body is easy to feed water when the outdoor environment-friendly water-cooling box is used outdoors, so that lubricating grease filled in the box body is emulsified and loses the lubricating effect; and meanwhile, iron parts (such as a gear worm and the inner wall of a box body) are seriously rusted, so that the on-off operation of the valve is influenced, and the service life of equipment is shortened.

In the prior art, two methods are generally adopted to solve the problems: one method is to increase the frequency of maintenance of the valve gear box, manually remove the sewage and rust, and replace the deteriorated grease. The disadvantages of this method are: wastes time and energy and resources, and does not fundamentally solve the waterproof problem of the valve gear box. Another method is to install a rubber rain cover on the top cover, and the method has the defects that: the rubber rain cover has lower strength and cannot be tightly combined with the top cover, so that the waterproof effect is influenced; and in outdoor environment, the rubber material is easy to age and needs to be more frequently.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a valve gear box with stronger waterproof nature, reduce and overhaul the frequency, reduce the consumption of manpower and materials.

In order to realize the above purpose, the utility model discloses a technical scheme:

the utility model provides a waterproof type valve gear box, is including built-in box, hand wheel, case lid and the top cap that has drive structure, the lower surface of top cap and case lid contact is provided with the recess, be provided with waterproof packing ring in the recess.

In some preferred embodiments, the groove is provided with two passes.

In some preferred embodiments, the lower surface of the top cover contacting the box cover is provided with an annular boss, and the groove is arranged on the surface of the annular boss.

In some preferred embodiments, a waterproof gasket is arranged between the box body and the box cover;

in some preferred embodiments, the internal cavity of the housing is filled with lithium-based grease.

In some preferred embodiments, the upper surface of the top cover is provided with an arrow-shaped valve position indicator.

The utility model has the advantages that:

1. the utility model discloses have better waterproof nature, rainwater when can effectively preventing the outdoor use makes iron spare part corrosion in entering into valve gear box's the box to the maintenance frequency of valve gear box has been reduced, labour saving and time saving, and the life of equipment has been improved.

2. The utility model discloses have better water resistance, even have a small amount of water to advance in the box, also be difficult for causing the lubricating grease emulsification rotten to guarantee good lubricating property.

Drawings

FIG. 1 is a schematic top view of a preferred embodiment of the present invention;

FIG. 2 is a schematic front view of a preferred embodiment of the present invention;

fig. 3 is a schematic front view of the top cover of the present invention;

FIG. 4 is a schematic sectional view A-A of the top cover of the present invention;

in the figure: 1. a box body; 2. a hand wheel; 3. a box cover; 4. a top cover; 5. a groove; 6. a waterproof gasket; 7. an annular boss; 8. Arrow-shaped valve position indicators.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further explained with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses an applicant has carefully studied the maintenance process of current pipeline high pressure valve gear case in long-term work practice, finds because valve gear case's waterproof nature is relatively poor and then arouses a great deal of problem, and valve gear case's waterproof nature is poor mainly by following several reasons cause:

firstly, the sealing performance of the top cover and the box cover is poor, so that rainwater and the like enter the box body along a gap between the top cover and the box cover;

secondly, the sealing performance of the box cover and the box body is poor, so that rainwater and the like enter the box body along the circular seam of the box cover;

finally, the lubricating grease filled in the box body has poor water resistance, is easy to emulsify and deteriorate when meeting water, and loses the lubricating effect.

According to above reason, the utility model discloses on current valve gear box's basis, provide a valve gear box that has better waterproof nature and water resistance. Fig. 1 is a preferred embodiment of the present invention, which provides a waterproof valve gear box, including a box body 1 with a built-in transmission structure, a hand wheel 2, a box cover 3 and a top cover 4; as shown in fig. 3 and 4, a groove 5 is formed on the lower surface of the top cover 4 contacting the case cover 3. Those skilled in the art will know that the box cover 3 is usually provided with a circular hole for fixing the transmission structure, which leaves a circular seam after installation, so the minimum diameter of the groove 5 should be larger than the diameter of the circular seam to play a waterproof role, which can be derived reasonably, and therefore the utility model discloses do not make further requirements on the minimum diameter of the groove 5.

Wherein, the built-in transmission structure in box 1 can be the gear drive structure, also can be worm gear drive structure, and its purpose all is through the switching of mechanical transmission control flap, the utility model discloses do not specifically limit to this.

In some preferred embodiments, the groove 5 is provided with two channels, and the groove 5 is provided with a waterproof gasket 6. The waterproof gasket 6 may be an O-ring seal. In the embodiment shown in fig. 3 and 4, the lower surface of the top cover 4 contacting the case cover 3 is provided with an annular boss 7, and the groove 5 is arranged on the surface of the annular boss 7. The annular boss 7 is arranged to reduce the contact area between the top cover 4 and the case cover 3 and reduce the amount of water entering the gap between the top cover 4 and the case cover 3 under the action of surface tension, and further, the plane part of the annular boss 7 and the waterproof gasket 6 form a sealing surface to more effectively prevent water from entering the gear case along the annular gap.

A waterproof gasket 6 is arranged between the box body 1 and the box cover 3. In some preferred embodiments, the waterproof gasket 6 may be a highland barley paper pad or a rubber pad. The person skilled in the art can select the required situation according to the actual situation in the field, and the utility model does not limit the situation further.

The inner cavity of the box body 1 is filled with lithium-based lubricating grease. Those skilled in the art will appreciate that it is more common in the art to fill cavities in the housing with a calcium-based grease. And the utility model discloses a lithium base lubricating grease have better water resistance, even consequently have a small amount of water to advance in the box, also be difficult for causing lubricating grease emulsification rotten to guarantee good lubricating property.

In a preferred embodiment of the present invention, as shown in fig. 1, the top cover 4 is provided with an arrow-shaped valve position indicator 7 on the upper surface thereof, and the color of the coating is red or other striking color. Compared with the indicator which is small in size and small in difference between the painting color and the whole painting color in the prior art, the current valve position state can be identified by operators more conveniently.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a waterproof type valve gear box, is including built-in box (1), hand wheel (2), case lid (3) and top cap (4) that have drive structure, its characterized in that: the lower surface that top cap (4) and case lid (3) contact is provided with recess (5), be provided with waterproof gasket (6) in recess (5).

2. The waterproof valve gearbox of claim 1, wherein: two grooves are arranged in the groove (5).

3. The waterproof type valve gearbox according to claim 1 or 2, wherein: the lower surface that top cap (4) and case lid (3) contact is provided with annular boss (7), recess (5) set up the surface at annular boss (7).

4. The waterproof valve gearbox of claim 1, wherein: a waterproof gasket (6) is arranged between the box body (1) and the box cover (3).

5. The waterproof valve gearbox of claim 1, wherein: the inner cavity of the box body (1) is filled with lithium-based lubricating grease.

6. The waterproof valve gearbox of claim 1, wherein: and an arrow-shaped valve position indicator (8) is arranged on the upper surface of the top cover (4).

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