KR102401325B1 - A lever rotation limit and locking device for ball valves - Google Patents

Abstract

The present invention relates to a lever rotation limiting and locking device for a ball valve. More particularly, the present invention relates to a lever rotation limiting and locking device for a ball valve, in which a stopper pin contacts a stopper rotating together with a lever to limit rotation of the lever by providing a stopper pin fixed to a ball valve bonnet, and by providing a stopper plate coupled with a holding pin, rotation of the lever due to external factors may be prevented by fixing the lever through the coupling of the holding pin with a holding pin hole formed in the stopper with a simple mechanism of hand-pressing action.

Description

A lever rotation limit and locking device for ball valves

The present invention relates to a rotation limiting and locking device of a valve lever, and more particularly, by having a stopper pin fixed to a ball valve bonnet, the stopper pin contacts a stopper rotating together with the lever to limit rotation of the lever, By including a stopper plate to which the holding pin is coupled, the holding pin locks the lever through coupling with the holding pin hole formed in the stopper to prevent the lever from rotating due to external factors. It's about locks.

Ball valves are provided with a spherical disk penetrating through the opening and closing part of the pipe, and the spherical disk is connected through a stem and a lever connected thereto, and the lever is rotated 90 degrees to open and close the pipe and control the fluid. It is a type of valve that controls the flow.

The ball valve complies with the standards stipulated by the American Society of Mechanical Engineers (ASME) and the American Petroleum Organization (API), etc. to ensure the safety of boilers and pressure vessels used in all industries, and the representative regulations regarding ball valves are ASME B16 .34 and API 6D and API 608. ASME B16.34, an example of the above standard, specifies a design for accurate open/close position indication (6.5.2 Position indication) for 90 degree rotation type valves, and API 6D provides locking in piping and valve specifications (5.14. Locking provision) and travel stops (5.17. Travel stops) are specified, and API608 specifies flange, screw and weld metal ball valve specifications. In particular, API 608 stipulates on position stops, which are means for controlling the stop position of a metal ball valve, and the position stops are provided for both valves fully open and fully closed (API 608 item 5.8.5). , not to be used in combination with packing glands, gland flanges or gland bolts (API 608 item 5.8.12.). The position stop of the conventional ball valve shown in Fig. 1 (a) limits the rotation of the stopper rotating like a lever out of the fully open and closed positions by contact with the gland flange, but this is API608 5.8.12. violates the item. Also, the ball valve shown by way of example in Fig. 1(b) is provided with a position stop by the stopper contacting the gland bolt, but similarly, API608 5.8.12. It is against the item. The significance of this ball valve position stop regulation is to limit the lever rotation angle range of 90 degrees required when switching between the fully open or fully closed state of the valve.

US Patent Registration No. 3552717 (registered on May 1, 1971.05.), which is a prior art document for a position stop of a ball valve, relates to a ball valve having a trunnion stop, and in more detail, a contact surface 92 on the trunnion 32. This is formed and a technique for limiting the rotation angle by contact with the stop pin 88 is disclosed. However, the position stop technology of the ball valve described in the prior art document is limitedly applicable only to the trunnion type mainly adopted for large-scale piping and valves, and is suitable for small-scale piping and valves. ) cannot be applied because it does not include a trunnion, and there is a problem in that all parts must be disassembled when processing deviation occurs because parts such as a trunnion or stop pin providing a position stop are located inside the valve.

In addition, Korea Patent No. 10-2097117 (announced on April 3, 2020) relates to a valve locking device, and more specifically, the handle 6 by contact with the rotation limiting means 4 including a stopping member. ), a technique for realizing locking by penetrating a fixing means (3) including a lock through a through hole formed in the opening/closing plate (1) and the fixing plate (2) is disclosed. However, the fixing means including the lock requires the operator to separately possess a lock releasing means such as a lock key, and requires the operation of a multi-step operation to be performed to unlock the locked lock by taking the unlocking means out of the clothing pocket, etc., thereby causing inconvenience. And, there is a problem that lowers the work efficiency.

US Registered Patent No. 3552717 (Registered on May 1, 1971) Korean Patent Registration No. 10-2097117 (2020.04.03. Announcement)

In order to solve the above problem, the present invention includes a stopper pin fixed to the ball valve bonnet, so that the stopper pin comes into contact with the stopper rotating together with the lever to limit the rotation of the lever, and includes a stopper plate to which the holding pin is coupled. Provided is a lever rotation limiting and locking device for a ball valve that can maintain and switch the locked or open state of the lever during operation with a simple mechanism in which the holding pin is coupled with the holding pin hole formed in the stopper.

In addition, the stopper plate and the stopper may further include a locking device hole, so that a locking means capable of passing through the locking device hole is combined to completely maintain the locking or open state of the lever so that it cannot be changed. Rotation restriction and locking devices are provided.

The present invention is a bonnet provided with a stem penetrating portion and a stopper pin fixing portion; a stem which is fixed through and fixed to the stem penetrating portion formed in the bonnet, a ball disk coupling portion is formed on one side, and a stopper coupling portion is formed on the opposite side; a stopper coupled to the stem to be positioned on the lower surface of the lever and rotated in the same direction and angle as the lever, the stopper having a holding pin hole; a stopper pin fixed to the bonnet and limiting rotation by contacting the stopper being rotated; a stopper plate having a stopper pin hole and a holding pin hole formed therein, and the stopper pin passing through the stopper pin hole to be coupled to the stopper pin; a holding pin for fixing the stopper and the stopper plate by being coupled through the holding pin hole formed in the stopper plate and the holding pin hole formed in the stopper; and a stopper pin spring positioned on a lower surface of the stopper plate while surrounding the outer circumferential surface of the stopper pin.

In one embodiment of the present invention, the bonnet may further include two or more gland bolt fixing parts.

In one embodiment of the present invention, the stopper has a symmetrical shape on the left and right sides with respect to the center line, and one or more holding pins spaced apart from the center line by the same distance may be formed on the left and right sides.

In one embodiment of the present invention, the stopper plate may be rotatable to be positioned on the lower surface of the stopper corresponding to the ball valve lock or open state with the stopper pin as a central axis.

In one embodiment of the present invention, the stopper plate is raised and lowered by an external force from an operator and an elastic force of a stopper pin spring according to the external force using the stopper pin as a vertical movement axis, thereby forming a stopper and a stopper plate by a holding pin. It is possible to switch between bound or dissociated states.

In one embodiment of the present invention, a snap ring penetrating the stopper pin hole so as to be positioned on the upper surface of the stopper plate pre-coupled to the stopper pin, and contacting the stopper plate, further comprising a snap ring to prevent the stopper plate from moving upward. can do.

In one embodiment of the present invention, the stopper and the stopper plate further include a locking device hole, the locking means can be fastened through the locking device hole.

On the other hand, the present invention can provide a ball valve lever rotation limiting and locking method using the lever rotation limiting and locking device for the ball valve.

In addition, the present invention may provide a ball valve comprising a lever rotation limiting and locking device for the ball valve.

The lever rotation limiting and locking device for a ball valve of the present invention can limit the rotation range of the lever by contacting the provided stopper pin with a stopper that rotates like a lever, and a worker in operation can use a separate locking/unlocking means as in the prior art There is an effect that the open or closed state of the lever can be maintained only with a simple mechanism of pressing only the stopper plate on which the holding pin is formed without possessing and using the lever.

In addition, the stopper plate and the stopper may further include a locking device hole, so that the locking or open state of the lever cannot be changed, such as when the operation is finished or the operator is absent, by coupling the locking means that can penetrate the locking hole. A double full locking effect that can be maintained is also possible.

1 is a view showing an upper surface and a vertical cross-section of a valve locking device according to the prior art.
2 is a view showing an upper surface and a vertical cross-section of a lever rotation limiting and locking device for a ball valve according to the present invention.
3 is (a) a view showing a stopper, a stopper pin, a stopper plate, a bonnet and a stem, which are components constituting the lever rotation limiting and locking device for a ball valve, and (b) an exploded perspective view of the components.
4 is a view showing an open or closed state of a lever rotation limiting and locking device for a ball valve in a state in which the holding pin is coupled to the stopper.
5 is a view illustrating an open or closed state of a lever rotation limiting and locking device for a ball valve in a state in which the holding pin is not coupled to the stopper.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is those well known and commonly used in the art.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or precedent of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

As used herein, terms such as “comprises,” “comprises,” or “has” refer to the presence of, and refer to, a feature, number, step, operation, component, part, or combination thereof described in the specification. It does not exclude the possibility that other features, figures, steps, operations, components, parts, or combinations thereof not present or may be added.

The present invention relates to a lever rotation limiting and locking device for a ball valve (1), and the valve locking device according to the prior art shown in FIG. It has a mechanism for limiting rotation of the lever according to contact with the gland bolt. However, the gland flange or gland bolt of the valve lock is originally a component of gland packing for sealing the rotating body, and serves to supplement the packing that is weakened over time. As the gland bolt is tightened, the packing is supplemented, but the height of the gland bolt is gradually reduced. . The applicant of the present invention has solved the above problems and has come to derive the valve locking device of the present invention that satisfies international standards such as ASME and API regarding valves.

Hereinafter, FIG. 2 is a view showing an upper surface and a vertical cross section of the lever rotation limiting and locking device 1 for a ball valve according to the present invention, and the present invention will be described in detail with reference thereto.

The lever rotation limiting and locking device for a ball valve of the present invention (1) includes a bonnet (10) having a stem penetrating part (11) and a stopper pin fixing part (12); a stem having a ball disk coupling part 21 formed on one side and a stopper coupling part 22 formed on the opposite side and being fixed through the stem penetration part 11 formed in the bonnet 10; a stopper 30 coupled to the stem 20 so as to be positioned on the lower surface of the lever L and rotated in the same direction and angle as the lever L, and having a holding pin hole 32 formed therein; a stopper pin 40 fixed to the bonnet 10 and limiting rotation by contacting the stopper 30 being rotated; a stopper plate 50 having a stopper pin hole 51 and a holding pin hole 52 formed therein, and the stopper pin 40 passing through the stopper pin hole 51 to be coupled to the stopper pin 40; A holding pin 60 for fixing the stopper 30 and the stopper plate 50 by passing through the holding pin hole 52 formed in the stopper plate 50 and the holding pin hole 32 formed in the stopper 30 . ); and a stopper pin spring 70 positioned on the lower surface of the stopper plate 50 while surrounding the outer circumferential surface of the stopper pin 40 .

The bonnet 10 is a cover of the valve body, and includes a stem penetrating part 11 through which the stem 20, which is a rotation axis of the lever L, passes, and a stopper pin fixing part 12 to which the stopper pin 40 is coupled. It is available.

The bonnet 10 further includes two or more gland bolt fixing parts 13 to connect and couple the gland bolt G to the bonnet 10 in addition to the gland flange to make the gland bolt G stronger and , can exhibit the effect of stably fixing.

The stopper pin fixing part 12 is a cavity through which the stopper pin 40 can pass, and the method for forming the cavity may be used without limitation as long as it is a known technique for forming a cavity on a metal, but preferably on the inner circumferential surface. Since irregularities such as threads are formed, a tap processing method that is easy to fix according to the coupling of the stopper pin may be used.

The stem 20 is a rod-shaped rotational shaft that transmits the rotational force generated by the rotation of the lever to the ball disk, and is penetrated and fixed to the stem penetrating portion 11 formed in the bonnet 10, and the ball disk is coupled to one side. The portion 21 is formed, the stopper coupling portion 22 is formed on the opposite side, and a lever coupling portion (not shown) to which the lever is coupled is formed at the end of the side where the stopper coupling portion 22 is formed.

The stem 20 may be selectively formed with a stem release prevention portion 23 including a protrusion, and pressure is applied to the stem 20 coupled in the valve so that the stem passes through the stem penetrating portion 11 . It is possible to prevent the stem 22 from being blown out because the protrusion included in the stem release preventing part 23 is caught in the stem penetrating part 11 from being released.

The stopper 30 is coupled to the stopper coupling portion 22 of the stem 20 so as to be located on the lower surface of the lever L, rotates in the same direction and angle as the lever, and contacts the stopper pin 40 of the lever. Restrict rotation so that the rotation angle does not exceed a certain range. Referring to FIG. 2 , the stopper contact surfaces 31a and 31b of the stopper 30 come into contact with the stopper pin 40 to limit the rotation of the lever.

The rotation angle of the lever L is an angle between the open and closed valve positions of the ball valve, and may be 85 to 95 degrees, preferably 87 to 93 degrees, and more preferably 88 to 92 degrees.

3 is (a) a view showing a stopper, a stopper pin, a stopper plate, a bonnet, and a stem, which are components constituting a lever rotation limiting and locking device for a ball valve, and (b) an exploded perspective view of the components.

The stopper 30 may be used without limitation as long as it has a stopper contact surface and can limit the rotation of the lever by contact with the stopper pin. The left and right sides have a symmetrical shape, and one or more holding pin holes 32 spaced apart from the center line by the same distance are formed on the left and right sides. In addition, the holding pin hole 32 formed in the stopper 30 is formed at a position corresponding to the holding pin hole 52 formed in the stopper plate 50 .

The stopper pin 40 is a component fixed to the bonnet 10 to limit rotation of the lever L by contact with the stopper 30 . A method of fixing the stopper pin to the bonnet may be used without limitation, but preferably, the stopper pin is inserted using a tab into the stopper pin fixing part 12 of the bonnet formed by the tab processing method, and then the stopper pin is welded by tag welding. can be fixed.

The stopper plate 50 has a stopper pin hole 51 formed therein to be coupled to the stopper pin 40, and the stopper 30 corresponding to the ball valve lock or open state with the stopper pin 40 as a central axis. It can be rotated to be positioned on the lower surface, and the holding pin hole 52 is formed so that the holding pin 60 passes through and combines with the holding pin hole 32 formed in the stopper 30 so that the position of the lever is unchanged. do.

The holding pin 60 may be coupled through the holding pin hole 52 formed in the stopper plate and the holding pin hole 32 formed in the stopper to fix the stopper 30 and the stopper plate 50 .

In addition, the holding pin 60 may be in a fixed state by being coupled to any one of the stopper 30 and the stopper plate 50 , which is a management method for the operator to prevent possession and loss of the holding pin 60 . It is preferable in that it can be used in a state equipped with the lever rotation limiting and locking device for the ball valve of the present invention without necessity.

The stopper pin spring 70 is located on the lower surface of the stopper plate 50 while surrounding the outer circumferential surface of the stopper pin 40, and is compressed or stretched depending on whether an external force is applied to the stopper plate 50 from an operator. is absent

Therefore, when the stopper pin spring 70 is compressed by receiving the external force of the operator pressing the stopper plate 50 located on the upper surface, the stopper plate 50 descends with the stopper pin 40 as an axis. The stopper 30 and the stopper plate 50, which were coupled by the holding pin 60, are released and separated, whereby the lever L rotates and the position state can be freely changed to closed or open.

That is, the stopper plate 50 is raised and lowered by an external force from an operator and an elastic force of the stopper pin spring according to the external force using the stopper pin as a vertical movement axis, so that the stopper 30 and the stopper by the holding pin 60 Switching the coupling or separation state of the plate 50 is a technical feature of the lever rotation limiting and locking device for the ball valve of the present invention.

In the prior art related to the valve locking device, an approach for making the position state of the valve unchanged is generally (1) using a container surrounding the components related to the rotation of the valve to fundamentally prevent contact and access to the valve and (2) a method of preventing rotation of a valve by penetrating a locking device such as a lock and fixing and integrating it through a locking device such as a lock since a hole is formed in two or more components involved in valve rotation. Since the method of fixing the position of the valve according to the prior art includes a locking means such as a lock, the operator must have a release means such as a key to unlock the locking means, and it causes inconvenience in preventing it from being lost do.

However, the lever rotation limiting and locking device 1 for a ball valve of the present invention includes the holding pin 60 as a stopper and holding pin holes 32 and 52 formed in the stopper plate, and holding the holding pin 60 . By adopting a method of coupling through the pinholes 32 and 52, a separate locking means such as a conventional lock is not essential, and workers are inconvenient due to the possession of unlocking means such as keys and management of loss prevention It also has the effect that it does not occur. In addition, by applying an external force to the stopper plate 50 provided on the lower surface of the stopper pin spring 70, the coupling or separation between the stopper 30 and the stopper plate 50 can be easily switched or adjusted to improve work efficiency. has an increasing effect.

A snap ring penetrating the stopper pin hole 51 so as to be positioned on the upper surface of the stopper plate 50 pre-coupled to the stopper pin 40 and contacting the stopper plate 50 to prevent an upward movement of the stopper plate. (54); may further include. The snap ring 54 prevents the stopper plate 50 from being raised and released from the stopper pin 40 by the elastic force of the stopper pin spring 70 .

On the other hand, as an embodiment of the present invention, the stopper 30 and the stopper plate 50 further include a locking device hole 53 , and the locking means 80 is fastened through the locking device hole 53 . It can exert a double-locking effect that firmly blocks the possibility of changing the position of the valve after work is completed or in the absence of on-site management personnel.

4 is a view showing the valve open or closed state of the lever rotation limiting and locking device for the ball valve in a state in which the holding pin 60 is coupled to the stopper 30 and the stopper plate 50 .

Referring to FIG. 4 , the stopper 30 is fixed and the stopper 30 is fixed in a state in which the position of the valve is open and the holding pin 60 is coupled to the stopper 30 and the stopper plate 50 . Since the lever (L), which is rotated as shown, cannot rotate, it is possible to block (Lock) the rotation of the lever due to operator negligence or external factors.

If the operator wants to change the position of the valve after changing the position of the valve from open to closed, the operator presses the stopper plate 50 to lower it and closes the lever ( Close), it is possible by rotating the stopper plate 50 to face the stopper 30 so that the holding pin 60 penetrates and engages the holding pin holes 32 and 52 .

Similarly, even when the position of the valve is closed, the rotation of the lever due to operator negligence or external factors is blocked due to the coupling and fixing of the stopper 30 and the stopper plate 50 by the holding pin 60 ( Locking) is possible.

As another embodiment of the present invention, Figure 5 shows the valve open or closed state of the lever rotation limiting and locking device for the ball valve in a state in which the holding pin 60 is not coupled to the stopper 30 and the stopper plate 50 It is the drawing shown.

5 is a view showing a state in which the holding pin 60 is not coupled to the stopper 30 and the stopper plate 50. Based on the drawing shown in FIG. 4, the operator presses the stopper plate 50 to descend. The coupling of the stopper 30 and the stopper plate 50 by the holding pin 60 is released, and the operator can freely rotate the lever L to switch the closed or open state of the valve.

As described above, the present invention has been described with reference to the embodiments shown in the accompanying drawings, which are only exemplary, and various modifications and equivalent other embodiments are possible by those of ordinary skill in the art. will understand that Therefore, the technical protection scope of the present invention should be defined by the following claims.

1: Lever rotation limiting and locking device for ball valves
10 : Bonnet
11: stem penetration
12: stopper pin fixing part
13: gland bolt fixing part
20: Stem
21: ball disk coupling part
22: stopper coupling part
23: stem release prevention part
30: stopper
31a, 31b: stopper contact surface
32: holding pin hole
33: lock hole
40: stopper pin
50: stopper plate
51: stopper pin hole
52: holding pin hole
53: lock hole
54: snap ring
60: holding pin
70: stopper pin spring
80: locking means
G : gland bolt
L: lever

Claims (9)

a bonnet provided with a stem penetrating part and a stopper pin fixing part;
a stem which is fixed through and fixed to the stem penetrating portion formed in the bonnet, a ball disk coupling portion is formed on one side, and a stopper coupling portion is formed on the opposite side;
a stopper coupled to the stem so as to be positioned on the lower surface of the lever and rotated in the same direction and angle as the lever, the stopper having a holding pin hole;
a stopper pin fixed to the bonnet and limiting rotation by contacting the stopper being rotated;
a stopper plate having a stopper pin hole and a holding pin hole formed therein, and the stopper pin passing through the stopper pin hole to be coupled to the stopper pin;
a holding pin configured to pass through the holding pin hole formed in the stopper plate and the holding pin hole formed in the stopper to fix the stopper and the stopper plate; and
and a stopper pin spring positioned on the lower surface of the stopper plate while surrounding the outer circumferential surface of the stopper pin.
According to claim 1,
The bonnet is a lever rotation limiting and locking device for a ball valve, characterized in that it further comprises two or more gland bolt fixing parts.
According to claim 1,
The stopper has a symmetrical shape on the left and right sides with respect to the center line, and one or more holding pins spaced apart from the center line by the same distance are formed on the left and right sides. .
According to claim 1,
The stopper plate is pivotable to be positioned on the lower surface of the stopper corresponding to the locked or opened state of the ball valve with the stopper pin as a central axis.
According to claim 1,
The stopper plate uses the stopper pin as a vertical movement axis and rises and falls by an external force from an operator and an elastic force of the stopper pin spring according to the external force, thereby switching the coupling or separation state of the stopper and the stopper plate by the holding pin. Lever rotation limiting and locking device for ball valves.
According to claim 1,
Lever for a ball valve, characterized in that it further comprises a snap ring penetrating the stopper pin hole so as to be positioned on the upper surface of the stopper plate pre-coupled to the stopper pin and contacting the stopper plate to prevent the stopper plate from moving upward. Restriction of rotation and locking device.
According to claim 1,
The stopper and the stopper plate further include a locking device hole, and the locking means is fastened through the locking device hole.
A method of limiting and locking a ball valve lever rotation using the lever rotation limiting and locking device for a ball valve according to any one of claims 1 to 7.
A ball valve comprising a lever rotation limiting and locking device for a ball valve according to any one of claims 1 to 7.

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