CN104819341A

CN104819341A - Valve locking mechanism

Info

Publication number: CN104819341A
Application number: CN201510253894.XA
Authority: CN
Inventors: 迟晓光; 沈令钧; 白锋; 马孟杰; 刘俊立
Original assignee: Hebei Jinqiao Balance Valve Co Ltd
Current assignee: Hebei Jinqiao Balance Valve Co Ltd
Priority date: 2015-05-19
Filing date: 2015-05-19
Publication date: 2015-08-05
Anticipated expiration: 2035-05-19
Also published as: CN104819341B

Abstract

The invention relates to a valve locking mechanism for controlling a fluid medium and belongs to the field of fluid control valves. A general flat key, a locking wheel and two ratchets and the like are sequentially placed on a valve rod above a lower flange. An upper flange and the lower flange are connected through a plurality of hexagon socket cap screws and pressed on a sleeve and two step shafts; and the two flanges are connected with the hexagon socket cap screws. The pair of symmetrical ratchets is arranged, the two ratchets have a self-locking function when in a locked state; one ratchet is used for preventing the locking wheel from rotating clockwise, and the other ratchet is used for preventing the locking wheel from rotating anticlockwise. Each ratchet is a lever part, the driven side is the tooth surface and a tooth body of the ratchet, the driving side is in a shifting fork shape, the middle of the ratchet is provided with a cylindrical hole, and the cylindrical hole is used for being matched with step shaft positioned through the cylindrical hole. A shaft is arranged, the middle section of the shaft undergoes trimming and tapping, and the hexagon socket cap screws or hexagon socket flat end fastening screws are installed to serve as parts for pushing the ratchets to rotate during the locking.

Description

A kind of locking framework of valve

Technical field

The present invention relates to the locking framework of a kind of valve that fluid medium carries out controlling, belong to fluid control valve field.

Background technique

In fluid control valve field, the Main Function that valve rises in pipeline is the flow of control media, and some key valves play vital effect especially, and therefore, reply valve carries out proper, safe operation and control.In actual production, being furnished with the place of a large amount of pipeline, is not often have professional workforce to guard, if carried out illegal operation by layman to the valve in pipeline, little, bring huge economic loss, greatly then cause serious security incident and cause casualties.For this reason, propose the concept of valve in valve industry, valve is exactly to prevent people from carrying out wrongful operation to valve, and valve opening and closing state is carried out rational, safe locking.

The lock mode of valve opening and closing state can be handwheel and valve body (or its link, as valve gap etc.) locking, also can be valve rod and valve body (or its link, as valve gap etc.) to be locked.

In existing valve opening and closing state lock-in techniques: have by the most straightforward procedure that iron chains and valve body lock together on valve handle in early days, due to too simple and unreliable, seldom adopt.

Had in recent years and a disk-shaped part was set on valve rod, be called locking wheel, the cylindrical outer surface of locking wheel processes dozens of and divides equally V-type groove in circumference, with the relatively-stationary part of valve body on an interior hexagonal is set bores and hold Cock screw, when needing to lock valve opening and closing state, with inner hexagon spanner by the V-type groove of the conical end precession locking wheel of interior hexagonal cone end Cock screw, reach and line-locked object is entered to valve opening and closing state.This locking framework has following shortcoming:

1, interior hexagonal cone holds the axis of active force by locking wheel of Cock screw, lock state is unreliable, turn valve rod during lock state, locking wheel point of contact can form shearing force by internal hexagonal cone end Cock screw contact, and shearing can cause interior hexagonal cone end Cock screw to damage repeatedly;

2, inner hexagon spanner commercially can arbitrarily be bought, and has and sabotages or for the people of certain object, can carry out wrongful operation easily to valve.

Summary of the invention

The present invention to realize a kind of can the open/close states of positive lock valve, locking device is turn valve rod when lock state, the wearing and tearing of working surface are very little, not easy damaged, and configure dedicated key, non-dedicated key can not change the locking framework of a kind of valve of locking valve state.

The technical solution adopted for the present invention to solve the technical problems is:

1, for the locking device of valve designs a platform, upper and lowerly be flange-type part, the several hexagon socket cap head screw of two flanges connects, the middle end face with a sleeve pipe and Step Shaft stage casing supports, the length in sleeve pipe and Step Shaft stage casing is equal, makes the cylindrical cavity height in the middle of two flanges be a definite value.

2, a locking wheel that can rotate with valve rod is designed, with parallel key as driving parts.

3, scheme one: design a pair symmetry ratchet, two ratchets all have auto-lock function when lock state, one rotates clockwise for preventing locking wheel, another rotates counterclockwise for preventing locking wheel, this ratchet is a thick stick component of rod category, and passive side is the flank of tooth and the tooth body of ratchet, and master end is the shape of shift fork, centre is a cylindrical hole, for coordinating with the Step Shaft of its location.

4, scheme two: design a pair symmetry ratchet, two ratchets all have auto-lock function when lock state, one rotates clockwise for preventing locking wheel, another rotates counterclockwise for preventing locking wheel, this ratchet is a thick stick component of rod category, passive side is the flank of tooth and the tooth body of ratchet, master end is straight plate shape, centre is a cylindrical hole, for coordinating with the Step Shaft of its location, master end arranges a cylindrically coiled spring, and the pressure of spring is tending towards two ratchets are rotated to lock state.

5, in the middle of two ratchet cylindrical holes, an axle is set by the position of valve rod axis, wherein chamfered edge, tapping in section, hexagon socket cap head screw or interior hexagonal flush end Cock screw are installed, as the part promoting ratchet rotation during locking.

6, scheme one: turn hexagon socket cap head screw clockwise, its screw thread end face heads on two shift fork open locking devices, counterclockwise turn hexagon socket cap head screw, its cylindrical end end face heads on two shift forks and does lock out action, two ratchets stretch in the V-type groove of locking wheel, realize the locking to valve opening and closing state.

7, scheme two: hexagonal flush end Cock screw in turn clockwise, its screw thread end face heads on two shift fork open locking devices, hexagonal flush end Cock screw in counterclockwise turn, cylindrically coiled spring heads on two shift forks and does lock out action, two ratchets stretch in the V-type groove of locking wheel, realize the locking to valve opening and closing state.

8, adopt " in hole, a straight pin has been installed in stationary fit; could need realize regulating with the special inner hexagon spanner with mesopore " in prior art ZL201220456015.5 " valve differential pressure adjusting device ", be applied to the present invention, in hexagon socket cap head screw or interior hexagonal flush end Cock screw, install a straight pin in hexagonal, non-dedicated key can not change the lock state of valve.

The advantage that the present invention is compared with prior art had and positive role:

1, technique computes that must be complicated just can complete design;

2, the valve that flowing medium carries out controlling is applied to, the open/close states of energy positive lock valve;

3, configure dedicated key, non-dedicated key can not change the state of locking valve;

4, two ratchets all have auto-lock function when lock state.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further detailed:

Fig. 1 is the longitudinal section tectonic maps (scheme one) of the locking framework embodiment of valve.

Fig. 2 is the partial view (scheme one, ratchet is in the lock state) that in the locking framework embodiment of valve, A-A analyses and observe.

Fig. 3 is the partial view (scheme one, ratchet is in unlocking condition) that in the locking framework embodiment of valve, A-A analyses and observe.

Fig. 4 is B direction view in the locking framework embodiment of valve, and in figure, piece number 13 represents in scheme one and scheme two, the straight pin in hexagon socket cap head screw or interior hexagonal flush end Cock screw.

Fig. 5 is the longitudinal section tectonic maps (scheme two) of the locking framework embodiment of valve.

Fig. 6 is the partial view (scheme two, ratchet is in the lock state) that in the locking framework embodiment of valve, A-A analyses and observe.

Fig. 7 is the partial view (scheme two, ratchet is in unlocking condition) that in the locking framework embodiment of valve, A-A analyses and observe.

1. lower flanges in figure, 2. upper flange, 3. hexagon socket cap head screw, 4. sleeve pipe, 5. locking wheel, 6. valve rod, 7. parallel key, 8. ratchet (two pieces), 9. axle, 10. the interior hexagonal flush end Cock screw in the hexagon socket cap head screw in scheme one, scheme two, the cylindrically coiled spring in 11. Step Shafts (two pieces) 12. scheme two, 13. straight pins.

Embodiment

In Fig. 1 or Fig. 5, on lower flange [1], the upper order of valve rod [6] loads parallel key [7], locking wheel [5], axle [9], with the hexagon socket cap head screw [10] (scheme for the moment) of straight pin [13] or the interior hexagonal flush end Cock screw [10] (during scheme two) with straight pin [13], two Step Shafts [11], cylindrically coiled spring [12] (during scheme two), two ratchets [8], sleeve pipe [4], upper flange [2], with several hexagon socket cap head screw [3] by upper flange [2], lower flange [1] connects and is pressed on sleeve pipe [4] and two Step Shafts [11].

Claims

1. the locking framework of a valve, on lower flange, on valve rod, order loads parallel key, locking wheel, axle, the hexagon socket cap head screw with straight pin, two Step Shafts, two ratchets, sleeve pipe, upper flanges, with several hexagon socket cap head screw, upper and lower Flange joint is pressed on sleeve pipe and two Step Shafts, it is characterized in that: the several hexagon socket cap head screw of two flanges connects, the middle end face with a sleeve pipe and Step Shaft stage casing supports, and the length in sleeve pipe and Step Shaft stage casing is equal.

2. the locking framework of valve according to claim 1, it is characterized in that: the ratchet designing a pair symmetry, two ratchets all have auto-lock function when lock state, one rotates clockwise for preventing locking wheel, and another rotates counterclockwise for preventing locking wheel, and this ratchet is a thick stick component of rod category, passive side is the flank of tooth and the tooth body of ratchet, master end is the shape of shift fork, and centre is a cylindrical hole, for coordinating with the Step Shaft of its location.

3. the locking framework of valve according to claim 1, it is characterized in that: in the middle of two ratchet cylindrical holes, an axle is set by the position of valve rod axis, wherein chamfered edge, tapping in section, hexagon socket cap head screw is installed, as the part promoting ratchet rotation during locking.