KR102660773B1 - Valve Safety Locking Device - Google Patents

Abstract

The present invention is provided to be detachable from the valve while moving between a separation position separated from the valve and a coupling position coupled with the valve, and includes a main body; a pair of side walls extending from both ends of the main body; A pair of lower skirts each extending inward from the lower end of each side wall; wherein the lever and a portion of the stem axis support are accommodated in the internal space formed by the main body, the side wall, and the lower skirt, and the lower A lever receiving portion is formed between the skirts to allow the stem shaft support to pass through. At the engaging position, the lower skirt is engaged with the lever and the stem shaft support, and a safety fixing bolt coupled to the main body is connected to the stem or the It is characterized in that it includes pressurizing the stem axis support.
According to the present invention, when a valve is coupled to a pipe that transports a cargo containing gas or liquid and opens and closes the pipe line, it is necessary to provide a valve safety locking device that can stably maintain the open or closed state. You can.

Description

Valve Safety Locking Device}

The present invention relates to a valve safety locking device, and more specifically, to a valve safety locking device with an improved structure to safely and stably maintain the locked state of a valve installed on a piping line through which gas or liquid is supplied.

In general, gas (GAS) is mainly composed of hydrocarbons with low boiling points, such as propane and butane gas, among petroleum components, and is liquefied by pressurizing the gas at room temperature. Recently, it has been widely used as a fuel for household, business, industrial, and automobile purposes. .

Because these gas fuels are more convenient to use than other fuels, they have become a necessity in modern people's lives, and because the gas business has a significant direct impact on the public's daily life, it is treated as a public service business, unlike ordinary entrepreneurs, and is treated as a public business, including fees, facilities, etc. Quality, etc. are regulated by law.

Gas supplied to the home is supplied to cooking appliances such as gas ranges through intermediate valves, and these intermediate valves are equipped with various safety devices that stop the operation of the intermediate valve when gas is not used for a long period of time. For example, the Korean utility model Intermediate valve safety devices are disclosed in Registration No. 0170493 and Korea Utility Model Registration No. 0370289.

Meanwhile, in workplaces where piping for the transfer of various fluids is complexly installed, such as in semiconductor manufacturing, power plants, and chemical plants, and where many valves are installed on the piping, controlling the flow of fluid through valve manipulation is essential for the overall process. It occupies a very large proportion, and as many workers work in such large workshops, there are often cases where intentional or accidental malfunctions are made regarding the setting state of the valve, contrary to the intention of the worker in charge.

In this way, if the valve is operated against the intention of the worker in charge, it can not only cause disruption to the process at the workplace, but also cause damage to the worker due to malfunction of the valve, especially in the work process where the valve setting must be absolutely maintained. It can also have a big impact on safety.

Therefore, LOTO (Lock Out/Tag Out) was used as a valve fixing means to prevent erroneous operation by fixing the operating part of the valve. After operating the machine in order to perform work such as process maintenance, locking, maintenance, cleaning, repair, etc., LOTO installs a lock or sign on the starting device to prevent others from operating the machine. This means measures such as:

LOTO is a procedure to ensure the safety of employees, partners, construction companies, visitors, etc. working in the workplace from unexpected start-up when inspecting and repairing machinery and equipment, etc. By installing LOTO, safety from unexpected start-up during work is secured. It can be used to secure the safety of visitors and prevent arbitrary manipulation of important facilities by controlling access to hazardous facilities.

However, this prior art has a problem in that key parts of the locking device protrude to the outside to prevent the valve from operating. In other words, this protruding structure can be damaged or shocked by external force, and there is a risk that an unspecified user may arbitrarily use a tool such as pliers to unlock the locking device.

[references]

Public Patent Publication No. 10-2023-0125611 (published on August 29, 2023)

Registered Patent Publication No. 10-0877761 (announced on January 8, 2009)

The purpose of the present invention is to provide a valve safety locking device that can stably maintain an open or closed state when it is coupled to a pipe that transports a cargo containing gas and requires a valve to open and close the pipe line. .

In addition, another object of the present invention is to provide a valve safety locking device that, when maintaining the open or closed state of a valve set with a tool not specifically set, the state of the valve maintained by other general tools cannot be simply and easily released. is to provide.

In addition, another object of the present invention is to provide a valve safety locking device that is removable, has a simple structure, and can increase safety.

The object of the present invention is an opening and closing means including a valve body having a flow path that is coupled to a pipe through which a fluid containing gas or liquid flows and guiding the flow of the fluid, and a ball that is accommodated in the valve body and opens and closes the flow path according to rotation. And one side is coupled to the opening and closing means and the other side is exposed to the outside, and is coupled to a valve having a stem coupled to the stem axis support of the valve body so that it can be coupled to a lever held by the user, and a safety locking device that limits the operation of the lever. wherein the main body is provided to be detachable from the valve while moving between a separation position separated from the valve and a coupling position coupled with the valve; a pair of side walls extending from both ends of the main body; A pair of lower skirts each extending inward from the lower end of each side wall; wherein the lever and a portion of the stem axis support are accommodated in the internal space formed by the main body, the side wall, and the lower skirt, and the lower A lever receiving portion is formed between the skirts to allow the stem shaft support to pass through. In the engaging position, the upper plate surface of the lower skirt is in contact with the lower plate surface of the lever, and the inner end of the lower skirt is engaged with the stem shaft support portion. This is achieved by a safety locking device, wherein a safety fixing bolt coupled to the main body presses the stem or the stem axis support portion.

In addition, it is preferable that a washer having a bolt coupling hole into which the safety fixing bolt is coupled is coupled between the upper end of the safety fixing bolt and the main body.

In addition, it is preferable that a washer guide is recessed in the plate surface of the main body so that the washer can be coupled, and the washer includes a cutting surface that is partially cut from the circular outer peripheral surface.

Additionally, it is preferable that the cutting surface of the washer is slidably coupled to the washer guide to limit rotation of the washer.

In addition, in the engaging position, the ball includes a protrusion formed to protrude to limit rotation of the lever so as to maintain the position in the open position and the closed position for opening and closing the flow path, and the protrusion is in contact with the open position and the closed position. It is preferable to include a stopper provided on the stem axis support portion to maintain the position.

In addition, the lower skirt preferably includes a protrusion engaging portion that engages the protrusion in the open or closed position to limit rotation of the lever.

In addition, the upper part of the safety fixing bolt includes a bolt head, and the washer preferably has a recessed bolt head receiving member provided to accommodate the bolt head at the engaging position so that the bolt head does not protrude beyond the upper end.

Accordingly, according to the present invention, when a valve is coupled to a pipe that transports cargo containing gas or liquid and requires a valve to open and close the pipe line, a valve safety locking device is provided that can stably maintain the open or closed state. can be provided.

Additionally, a valve safety lock may be provided so that if the open or closed state of the set valve is maintained with a non-specially set tool, the maintained state of the valve cannot be simply and easily released by other common tools.

Additionally, it is possible to provide a valve safety locking device that is detachable and has a simple structure.

1 is a perspective view of a safety lock;
Figure 2 is a cross-sectional view of the main part;
Figures 3a to 4f are drawings and photographs to explain the operation process of the safety lock.

The valve safety locking device (1000, hereinafter referred to as ‘safety locking device’) according to the present invention will be described in detail with reference to FIGS. 1 to 4f as follows.

Figure 1 is a perspective view of the safety locking device, Figure 2 is a cross-sectional view of the main part, and Figures 3a to 4f are drawings and photographs for explaining the operation process of the safety locking device.

Before explaining the present invention in more detail, since the present invention can make various changes and take various forms, implementation examples (or embodiments) will be described in detail in the text. . However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

In each drawing, the same reference signs, especially the tens and ones digits, or the same tens, ones, and alphabets indicate members having the same or similar functions, and unless otherwise specified, each of the drawings The member indicated by the reference sign can be understood as a member that complies with these standards.

In addition, in each drawing, the components are expressed exaggeratedly large (or thick), small (or thin), or simplified in size or thickness in consideration of convenience of understanding, etc., but as a result, the scope of protection of the present invention is interpreted as limited. It shouldn't be.

The terms used in this specification are merely used to describe specific implementation examples (sun, aspect, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as ~include~ or ~consist of~ are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

The safety locking device 1000 according to an embodiment of the present invention includes a valve body 110 having a flow path that is coupled to a pipe through which a fluid containing gas or liquid flows and guides the flow of the fluid, and the valve body 110. An opening and closing means including a ball (not shown) that is received in and opens and closes the flow path according to rotation, and one side is coupled to the opening and closing means and the other side is exposed to the outside and can be coupled to the lever 150 held by the user. It is coupled to the valve 100 having a stem 130 (shown only when necessary hereinafter) coupled to the stem shaft support 140 of 110 and functions to limit the operation of the lever 150.

The safety locking device 1000 is provided to be detachable from the valve 100 while moving between a separation position separated from the valve 100 and a coupling position coupled with the valve 100, and is connected to the main body 1100 and ; a pair of side walls 1300 extending from both ends of the main body 1100; Includes a pair of lower skirts 1500 each extending inward from the lower end of each side wall 1300, wherein the inner space formed by the main body 1100, the side wall 1300, and the lower skirt 1500 A portion of the lever 150 and the stem shaft support portion 140 is accommodated, and a lever receiving portion 1510 is formed between the lower skirt 1500 to allow the stem shaft support portion 140 to pass through. In the coupled position, the upper plate surface of the lower skirt 1500 is in contact with the lower plate surface of the lever 150, and the inner end of the lower skirt 1500 is engaged with the stem shaft support 140 and is positioned on the main body 1100. It is preferable that the combined safety fixing bolt 1800 presses the stem 130 or the stem shaft support 140.

The main body 1100 has a plate shape on the upper side and includes a washer guide 1130 that is recessed in the upper central portion to engage a washer 1700 in the longitudinal direction. The washer guide 1130 includes the stem axis support portion 140. A guide bolt coupling hole 1150 through which the safety fixing bolt 1800 engages is formed at a position corresponding to the central axis.

The side wall 1300 functions to firmly couple the main body 1100 and the lower skirt 1500. In particular, when the safety fixing bolt 1800 firmly secures the main body 1100, side wall 1300, and lower skirt 1500 to the valve 100 at the coupling position, it functions to enable the components to withstand tension.

The lower skirt 1500 is shaped like a plate extending approximately 90 degrees inward from the lower part of the side wall, and is an area that is coupled (contacted or engaged) with the valve 100, and includes a lever receiving portion 1510 and a protrusion 1 engaging portion ( 1530) and a protrusion 2 engaging portion 1550.

The lever receiving part 1510 is provided in the shape of the lever 150 area or the stem axis support area 140 with the lower skirts 1500 on the left and right in the center spaced apart and functions to accommodate them.

The first protrusion 1530 and the second protrusion 1550 engage the first protrusion 155a and the second protrusion 155b at a coupling position so that the first protrusion 155a and the second protrusion 155b formed on the lever 150 engage with each other. This is a portion where the plate-shaped lower skirt 1500 has been removed at a position corresponding to the protrusion 155b.

The washer 1700 is coupled to the washer guide 1130 to limit rotation and functions to be coupled to the safety fixing bolt 1800 while preventing it from protruding from the coupling position from the top of the washer 1700. The washer 1700 preferably includes a washer bolt coupling hole 1730, a cutting surface 1750, and a bolt head receiving member 1770.

The washer bolt coupling hole 1730 is formed through a portion where the safety fixing bolt 1800 is coupled.

The cutting surface 1750 is an area where the side surface has been removed so that it can be accommodated in the width recessed in the longitudinal direction of the washer guide 1130, and the rotation of the cutting surface 1750 is restricted by the washer guide 1130.

The bolt head receiving member 1770 is an area that is recessed from the upper plate surface of the washer 1700 to the height of the bolt head 1810 so that the bolt head 1810 can be accommodated at the coupling position.

With the safety locking device 1000 coupled to the valve 100 to prevent the lever 150 from operating at the coupled position by the bolt head receiving member 1770, the bolt head can be removed using external force or tools such as conventional nippers or pliers. Even if you try to rotate (1810), you cannot pick up the bolt head (1810) because the bolt head (1810) is accommodated inside the bolt head accommodating member (1770). Therefore, the safety fixing bolt (1800) must be replaced with a normal tool to remove the bolt head (1810). 1810) cannot be picked up or rotated.

The safety fixing bolt 1800 is formed as a bolt that functions to maintain the safety locking device 1000 stably fixed at the set position of the valve 100.

The safety fixing bolt 1800 has a bolt head 1810 on the upper side, a bolt screw portion 1820 formed with a threaded portion on the lower side, and a jig coupling groove 1830 recessed in a special shape set at the upper end of the bolt head 1810. .

The jig coupling groove 1830 has a special shape, for example, a star shape, and preferably has a square groove in the center.

That is, as described above, the safety fixing bolt 1800 does not protrude from the washer 1700 and can therefore rotate only through the jig coupling groove 1830. Accordingly, the safety fixing bolt (1800) can be stably operated only by using a special tool or jig that is not made of a normal cross or straight groove and is engaged with the jig coupling groove (1830).

The safety fixing bolt 1800 is located on the same central axis as the stem coupled with the ball of the valve 100 and can firmly maintain the safety locking device 1000 in the valve 100 by pressing the upper axial end of the stem. That is, at the engaging position, the first protrusion (155a), the second protrusion (155b), and the lever receiving portion (1510) on the lower side engage or contact with the protruding second engaging portion (1530) and the lever receiving portion (1510) of the valve 100. Therefore, the lower skirt 1500 cannot rotate, and the safety fixing bolt 1800 is coupled to the main body 1100 to pressurize the engaged or contacted state of the lower skirt 1500.

Accordingly, it is possible to prevent unnecessary manipulation of the safety fixing bolt 1800, and thus has the advantage of being able to stably maintain the position of the valve 100 set by the user.

And in the present invention, the valve 100 may include various valves, but will be described using a ball valve as an example.

The valve 100 includes a valve body 110 capable of being coupled to a piping line, an opening and closing means including a ball, a stem in the shape of a rotating axis that rotates or operates the opening and closing means, and a stem shaft support portion 140 on which the stem is supported. It is provided in the main body 110.

The stem is coupled with a lever 150 that the user can hold and apply external force to the stem, and the lever 150 is coupled to the stem by an axle nut 133.

The lever 150 consists of a somewhat long plate-shaped handle 153 so that the user can hold it, and an opening/closing plate portion 155 that is bent and extended from the handle 153 and coupled to the stem.

The opening and closing plate portion 155 engages or contacts the stopper 143 protruding from the stem shaft support 140 and is oriented about 90 degrees to maintain the open and closed positions for opening and closing the passage of the valve 100. A first protrusion 155a and a second protrusion 155b having a protruding or bent shape are formed from the plate surface of 155).

In this embodiment, when the handle 153 or the opening/closing plate 155 rotates around the central axis of the ball and the stem, the position where the first protrusion 155a contacts the stopper 143 and rotation is restricted is at the valve body 110. ) The closed position where the internal flow path is closed can be maintained, and the position where the rotation of the second protrusion (155b) is in contact with the stopper 143 is restricted is maintained in the open position where the internal flow path of the valve body 110 is opened. do.

The operation process of the safety lock 1000 having this structure will be described in detail with reference to FIGS. 3A to 4F as follows.

Here, it is assumed that the safety locking device 1000 functions to maintain the closed position in which the passage of the valve 100 is closed. For example, assuming that construction or inspection is being carried out in the area downstream of the valve 100 in a gas pipe, the user will be in a very dangerous situation if the closed valve 100 is opened during the construction period, so the user must use the valve 100. ) must remain closed.

First, as shown in FIG. 4A, the user separates the safety lock device 1000 and places the valve 100 through the position shown in FIG. 4B to the separated position shown in FIGS. 3A and 4C.

Next, as shown in FIGS. 3B and 4D, the user lifts the safety lock 1000 toward the lever 150 so that the first protrusion 155a and the second protrusion 155b are aligned with protrusion 1 of the lower skirt 1500. It is engaged with the engaging portion 1530 and the protrusion 2 engaging portion 1550. In this process, if necessary, the user may rotate the safety fixing bolt 1800 and gradually move the lower skirt 1500 upward.

And, as shown in Figure 4e, the user is located on the same axis as the stem, which is the rotation axis, and attaches a tool coupled with a special jig to the jig of the bolt head 1810 so that the lower side of the bolt screw portion 1820 can contact or contact the upper portion of the stem. Rotate the safety fixing bolt (1800) so that it engages the coupling groove (1830). Due to the rotation of the safety fixing bolt 1800, the lower skirt 1500 of the safety lock 1000 comes into further contact with the plate surface of the stem shaft support 140 and the lever 150, especially the opening and closing plate 155. It is pressurized and the safety fixing bolt 1800 is accommodated in the bolt head receiving member 1770 of the washer 1700.

When the safety fixing bolt 1800 is completely operated in this way, even if the user holds and turns the lever 150 as shown in FIG. 4f, the safety lock device 1000 allows the valve 100 to maintain the lever 150 in the closed position. The lever 150 cannot rotate. Accordingly, anyone other than the user or authorized personnel cannot release the closed state of the valve 100.

After the work is completed, the user or a person authorized by the user rotates the safety fixing bolt 1800 with a rotating tool having a jig that engages the jig coupling groove 1830 of a special shape to secure the safety lock 1000 to the valve 100. ), the valve 100 can be operated.

Accordingly, according to the present invention, when a valve is coupled to a pipe that transports cargo containing gas or liquid and requires a valve to open and close the pipe line, a valve safety locking device is provided that can stably maintain the open or closed state. can be provided.

Additionally, a valve safety lock may be provided so that if the open or closed state of the set valve is maintained with a non-specially set tool, the maintained state of the valve cannot be simply and easily released by other common tools.

Additionally, it is possible to provide a valve safety locking device that is detachable and has a simple structure.

Although several embodiments of the present invention have been illustrated and described herein, those skilled in the art will recognize that modifications can be made to the present embodiments without departing from the principles or spirit of the present invention. The scope of the invention will be determined by the appended claims and their equivalents.

1000: Safety lock 1100: Main body
1130: Washer guide 1150: Guide bolt coupling hole
1300: side wall 1500: lower skirt
1510: Lever receiving part 1530: Protrusion 1 engaging part
1550: Protrusion 2 engaging portion 1700: Washer
1730: Washer bolt coupling hole 1750: Cutting surface
1770: Bolt head receiving member 1800: Safety fixing bolt
1810: Bolt head 1820: Bolt thread part
1830: Jig coupling groove
100: valve 110: valve body
130: stem
133: shaft nut 140: stem shaft support
143: stopper 150: lever
153: handle 155: opening and closing plate
155a: first protrusion 155b: second protrusion

Claims (7)

A valve body having a flow path that is coupled to a pipe through which a fluid containing gas or liquid flows and guiding the flow of the fluid, an opening and closing means including a ball accommodated in the valve body and opening and closing the flow path according to rotation, and one side of the opening and closing means is In the safety locking device that is coupled to the valve and the other side is exposed to the outside and has a stem coupled to the stem axis support of the valve body so that it can be coupled to a lever held by the user to limit the operation of the lever,
It is provided to be detachable from the valve while moving between a separation position separated from the valve and a coupling position coupled with the valve,
With the main body;
a pair of side walls extending from both ends of the main body;
Includes a pair of lower skirts each extending inward from the lower end of each side wall,
The lever and a part of the stem shaft support are accommodated in the internal space formed by the main body, the side wall, and the lower skirt, and a lever receiving portion through which the stem shaft support can pass is formed between the lower skirt, and the coupling In the position, the upper plate surface of the lower skirt is in contact with the lower plate surface of the lever, the inner end of the lower skirt is engaged with the stem shaft support, and the safety fixing bolt coupled to the main body presses the stem or the stem shaft support. A safety locking device characterized in that. According to paragraph 1,
A safety locking device, characterized in that a washer having a bolt coupling hole into which the safety fixing bolt is coupled is coupled between the upper end of the safety fixing bolt and the main body. According to paragraph 2,
A washer guide is recessed in the plate surface of the main body so that the washer can be coupled, and the washer includes a cutting surface that is partially cut from the circular outer peripheral surface. According to paragraph 3,
A safety locking device, wherein the cutting surface of the washer is slidably coupled to the washer guide to limit rotation of the washer. According to paragraph 1,
In the engaging position, the ball includes a protrusion formed to protrude to limit the rotation of the lever so as to maintain the position in an open position and a closed position in which the ball opens and closes the flow path,
A safety locking device comprising a stopper provided on the stem axis support portion so that the protrusion contacts and maintains the position in the open position and the closed position. According to clause 5,
A safety locking device, characterized in that the lower skirt includes a protrusion engaging portion that engages the protrusion in the open position or the closed position to limit rotation of the lever. According to paragraph 4,
The upper part of the safety fixing bolt includes a bolt head,
A safety locking device, characterized in that a bolt head receiving member provided to accommodate the bolt head at the engaging position is recessed in the washer so that the bolt head does not protrude beyond the upper end.

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