CN2247750Y - Anti-theft valve - Google Patents

Abstract

The utility model relates to an anti-theft valve, which is composed of a hand wheel, a leading screw nut, a key, a leading screw, a bearing seat, a valve body and a valve core. The contact face of the bearing seat and the leading screw nut is provided with a lockpin counterbore; the section of the counterbore extending to the leading screw nut is a semicircular slot, and the section corresponding to the bearing seat is also a semicircular slot; the inner part of the lockpin counterbore is provided with a step-shaped pin body, and the pin body is fixed by a circlip. Because the utility model adopts a plurality of lockpins, the utility model has the advantages of favorable anti-theft performance, good invisibility of the lockpin and little possibility of being damaged. The utility model can be directly applied to different series of well head devices for extracting oil in-situ and field valves with various specifications easy to be stolen in other industries.

Description

A kind of valve for guarding against theft

The utility model relates to a kind of valve for guarding against theft, belongs to valve switch control field.

At present, the on-the-spot valve that uses in oil field does not mostly possess antitheft effect, therefore usually stolen oil is stolen gas, the normal production order in oil supply district causes confusion, though some valve takes some measures, for example valve handle and pipeline is pinned with chain lock, but anti-theft effect is bad, mainly be that lockhole is easily dead by plug, causes and can't open because chain lock is easily cut (pounding) to break.

The purpose of this utility model is to overcome shortcoming of the prior art, and a kind of good anti-theft effect is provided, and is easy and simple to handle, and can be in the novel anti-theft valve that locks under the opening state in various degree to valve.

The purpose of this utility model is achieved in that valve for guarding against theft is made up of handwheel, feed screw nut, key, screw mandrel, bearing support, valve body and spool, open a half slot in the feed screw nut lower end every several angle, have one or more lock pin counterbores on bearing support and feed screw nut's the surface of contact.When extending to the feed screw nut, this hole is feed screw nut's half slot, the corresponding shaft bearing part also has same half slot, the stepped shaft shank is housed in the counterbore, shank front end projection is in feed screw nut's half slot the time, and the feed screw nut can't rotate, and therefore also can't rotate handwheel and drive screw mandrel and lift flashboard, when shank front end projection goes to the half slot of bearing support, the feed screw nut has not had restriction, therefore just can rotate handwheel, finishes opening/shutting valve.Because the feed screw nut lower end evenly has half slot, so revolution starts to take turns several angle, and screw mandrel lifts lock and pulls and rise or during the decline certain distance, all available shank is locked, thereby realizes that valve is in the locking under the opening state in various degree.

The utility model can adopt a plurality of lock pins, and theftproof performance is good, and the lock pin good concealment is survivable simultaneously, goes up the wellhead for production and the open-air many specification valves easily stolen of other industry that can directly apply to different series at the scene.

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1: be the valve for guarding against theft structural representation;

Fig. 2: be the lock pin enlarged diagram;

Fig. 3: be lock pin external structure schematic representation;

Fig. 4: be the handwheel schematic representation;

Fig. 5: be the lock pin distribution schematic diagram.

Among the figure: handwheel-1, feed screw nut-2, key-3, screw mandrel-4, bearing support-5, valve body-6,

Spool-6 ', handwheel mark-7, handwheel dial-8, lock pin dial-9, shank-10, lock pin mark-11, circlip-12, interior hex slot-13, half slot-14, half slot-15, circlip groove-16.

Present embodiment is a most preferred embodiment, adopts three lock pins respectively to become hexagonal angle, as shown in Figure 5.Valve for guarding against theft is connected by key 3 with feed screw nut 2 by handwheel 1, be carved with handwheel mark 7 on the handwheel 1, handwheel dial 8 is arranged on bearing support 5, handwheel mark 7 is used with dial 8, angle such as Fig. 4 that the expression handwheel turns over, bearing support 5 and valve body 6 are connected by screw thread, a half slot 14 is opened every 30 ° of angles in feed screw nut 2 lower ends, be that whole feed screw nut 2 lower ends have 12 half slots 14, open a lock pin counterbore every hexagonal angle on bearing support 5 and feed screw nut's 2 the surface of contact, when extending to feed screw nut 2, this hole is feed screw nut's half slot 14, the part of corresponding shaft bearing 5 also has same half slot 15, stepped shaft shank 10 is housed in the lock pin counterbore, and shank 10 relies on the circlip 12 in the circlip groove 16 fixing in the lock pin counterbore, as shown in Figure 2.Hex slot 13 and lock pin mark 11 in the exposed parts of shank 10 is processed with have lock pin dial 9, as shown in Figure 3 around the lock pin counterbore.Interior hex slot 13 is rotated shank 10 for interior six stupefied wrench, and lock pin mark 11 and lock pin dial 9 are used, the position that the expression shank rotates.When the front end projection of shank 10 forwards feed screw nut 2 half slot 14 to, feed screw nut 2 is lockable, and can't rotate, and therefore also just can't rotate handwheel 1 and drive screw mandrel 2 handling flashboards, have only when the front end projection of shank 10 forwards the half slot 15 of bearing support to, but the ability Open valve.When liquid was installed, flashboard was in minimum position, and promptly the valve buttoned-up status is installed feed screw nut 2, made certain three half slot 14 of feed screw nut 2 bottoms just in time identical with the front portion of three shanks 10, and other parts are installed then.At this moment during Open valve, only need to insert in the interior hex slot 13 with interior six stupefied wrench, rotate shank 10 respectively, rely on lock pin mark 11 and lock pin dial 9, three shanks, 10 front end projections are forwarded in the half slot 15 of bearing support, just can opening/shutting valve, if the front end projection of a shank 10 is arranged in feed screw nut 2, just can't Open valve, three shanks 10 outer lock pin mark 11 and lock pin dial 9 can be set arbitrarily, strengthen anti-theft.Behind Open valve, can be according to the position of handwheel mark 7 indication handwheel dial 8, handwheel 1 revolution moves 30 ° of angles, i.e. screw mandrel 2 handling flashboard certain distances, can rotate shank 10 and pin feed screw nuts 2, be in locking under the opening state in various degree thereby finish valve.

Claims (3)

1. valve for guarding against theft, form by handwheel, feed screw nut, key, screw mandrel, bearing support, valve body and spool, it is characterized in that having the lock pin counterbore on bearing support (5) and feed screw nut's (2) the surface of contact, the part that this hole extends to feed screw nut (2) is half slot (14), corresponding shaft bearing (5) part is half slot (15), be provided with stepped shaft shank (10) in the lock pin counterbore, shank (10) is fixing by circlip (12).

2. valve for guarding against theft according to claim 1, the Vertical direction that it is characterized in that feed screw nut (2) lower end edge screw mandrel (4) central axis is opened a half slot (14) every 30 ° of angles radially.

3. valve for guarding against theft as claimed in claim 1 or 2 is characterized in that bearing support (5) and feed screw nut's (2) surface of contact have a lock pin counterbore every hexagonal angle.

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