KR20170060289A - Master key locking valve - Google Patents

Master key locking valve Download PDF

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Publication number
KR20170060289A
KR20170060289A KR1020150164512A KR20150164512A KR20170060289A KR 20170060289 A KR20170060289 A KR 20170060289A KR 1020150164512 A KR1020150164512 A KR 1020150164512A KR 20150164512 A KR20150164512 A KR 20150164512A KR 20170060289 A KR20170060289 A KR 20170060289A
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KR
South Korea
Prior art keywords
slide
valve
master key
groove
pin
Prior art date
Application number
KR1020150164512A
Other languages
Korean (ko)
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KR101756166B1 (en
Inventor
박래성
남궁탁진
Original Assignee
아래스 주식회사
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Priority to KR1020150164512A priority Critical patent/KR101756166B1/en
Publication of KR20170060289A publication Critical patent/KR20170060289A/en
Application granted granted Critical
Publication of KR101756166B1 publication Critical patent/KR101756166B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K35/00—Means to prevent accidental or unauthorised actuation
    • F16K35/06—Means to prevent accidental or unauthorised actuation using a removable actuating or locking member, e.g. a key
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K35/00—Means to prevent accidental or unauthorised actuation
    • F16K35/04—Means to prevent accidental or unauthorised actuation yieldingly resisting the actuation

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)

Abstract

A master key lock type valve is provided on a channel through which fluid flows, and controls the flow of fluid moving along the channel by the rotation of the handle. A mounting hole is formed on one side of the mounting hole so that a slide for raising the mounting pin can be seated on one side of the mounting hole and a lower end portion of the master key inserted into the inside is formed on one side of the mounting groove, And an upper end of the upper body protruding to the outside through the through hole is formed on one upper surface of the upper body, A receiving groove for receiving a holding member for holding the master key is formed, The lower body is coupled to the upper surface of the upper body and the upper body and the upper portion of the opening and closing member can pass through the center of the upper body and the valve, respectively, so that the lower end thereof is inserted into the fitting groove, And a disk in which at least one pin hole is provided so that the lower end of the lowering pin can be fitted to the outer periphery of the upper surface.

Description

A master key locking valve

The present invention relates to a master key lock type valve which is capable of controlling opening and closing of a valve through rotation of a handle interrupted by a master key so that only an authorized worker can operate the valve.

Generally, a valve installed on a pipeline for controlling the flow of fluid such as liquid or gas by pipe is used for various purposes in various industrial fields. After the handle is installed on such a valve, To control the flow of the fluid moving along the channel, or to regulate the flow rate thereof.

On the other hand, in the case where vibration is generated in the use of such a valve, or in a place sensitive to a small change in the flow rate, it is necessary to prevent the handle for controlling the fluid flow of the valve from moving arbitrarily.

Whereby the rotation preventing means is provided inside the handle for opening and closing the valve, and such rotation preventing means is constituted so as to be able to be operated in accordance with the use of the master key which can be operated only by an authorized worker.

The prior art of the valve including the handle provided with the anti-rotation means has already been described in Korean Patent No. 10-1221432. The conventional configuration including the prior art has the following problems.

First, in the case of the anti-rotation means provided in the handle of the conventional valve, the insertion direction of the master key fitted to the handle is inserted in the same direction as the flow of the fluid, that is, The master key inserted into the handle may be easily separated by the vibration of the valve or the surrounding environment, and there is an inconvenience that the operation is difficult due to the interference with the valve and the pipe when the master key is operated.

In this case, when the elastic force of the spring is small, it is easy to raise the engaging pin due to the insertion of the master key. However, when the master key When the spring is separated from the handle, the fastening pin that has been lifted is not correctly lowered, so that the operability and operating accuracy of the handle may be poor. When the elastic force of the spring is too large, There is a problem that the user feels discomfort.

Korean Patent No. 10-1221432 (published on July 24, 2012)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a master key which is installed in a handle for adjusting a fluid flow of a valve, It is an object of the present invention to provide a master key locking type valve that can be easily detached from a handle and can double the operation efficiency of the handle.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

According to a preferred embodiment of the present invention, a through hole is formed in one upper surface of the valve body so as to pass through an upper portion of an opening and closing member for opening and closing a channel of a valve, A mounting groove is formed on one side of the mounting hole so that a slide for raising the mounting pin can be seated and a mounting groove is formed on one side of the mounting groove through a lower end portion of the master key A lower body having a fitting groove for moving the slide to raise the fastening pin,

A receiving groove for receiving a fixing member for fixing an upper end of the opening and closing member protruding to the outside through the through hole is formed on one upper surface of the lower body, An upper body having a key insertion hole formed therein so that the lower end thereof can be inserted into the fitting groove to move the slide,

A shaft hole is formed at the center of the upper body to allow the upper portion of the opening and closing member to pass therethrough and a lower end of the lowering pin, And one or more discs.

The fastening pin may be formed with a fastening protrusion formed on the upper portion of the fastening pin. The fastening pin may have a groove portion that is recessed inward at a central portion of the fastening pin so that the slide can be inserted into the outer peripheral surface of the fastening pin. And the other side is thicker than one side so as to form an upward inclined surface from one side to the other side.

The center of the slide is protruded outwardly. The seating groove on which the slide is seated includes a first seating groove on which a protruded central portion of the one side of the slide is seated, and a second seating on which the other side of the slide is seated Wherein the curved portion of the curved portion of the curved portion of the curved portion is curved so that the curved curved portion of the curved curved portion ≪ / RTI >

More preferably, the step of the slide is formed in an arcuate shape.

More preferably, the other end of the slide is arcuate.

More preferably, the lower end of the master key is formed in a cross shape, and the key insertion hole is formed in a cross shape corresponding to the shape of the lower end of the master key.

More preferably, a locking groove recessed in a curved shape is formed at an upper portion of the protruding lower end of the master key, so that when the master key is fitted into the fitting groove, the other end of the slide is seated in the locking groove .

More preferably, a ball flange is provided on the upper surface of the disk, and at the bottom of the lower body, at least one groove that can be selectively fitted to the ball flange is provided, so that the rotation of the lower body is stepwise rotated by the ball flange .

The master keylocked valve according to the present invention has the following advantages.

That is, by configuring the master key fitted in the handle so as to be fitted vertically downward without any directionality, it is possible to improve operability of the master key and to prevent unnecessary departure of the master key.

In addition, since the rotation preventing means by the master key insertion performs an accurate operation, the efficiency and accuracy of opening and closing of the valve and the flow rate adjustment by the handle are improved, and the malfunction of the handle can be prevented.

Here, the effect of the present invention described above is expected to be exerted by the constitution of the contents regardless of whether or not the inventor perceives it. Therefore, the above-mentioned effect is only some effects according to the contents described, Should not be recognized.

Further, the effect of the present invention should be grasped further by the entire description of the specification, and even if it is not stated in an explicit sentence, a person having ordinary skill in the art to which the written description belongs, It should be seen as an effect described in this specification.

1 is an exploded perspective view illustrating a handle and a master key of a master key-locked valve according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a state in which a handle and a master key of a master keylocked valve are engaged according to an embodiment of the present invention. FIG.
3 is a cross-sectional view of a handle of a master key-locked valve in accordance with an embodiment of the present invention.
FIG. 4 is a cross-sectional view illustrating a state where a key is inserted into a handle of a master keylocked valve according to an embodiment of the present invention. FIG.
5 is a cross-sectional view showing a state before a master key is fitted in a state where a master key-operated valve and a handle are engaged according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view illustrating a state in which a master key is fitted in a state where a master key-locked valve and a handle are engaged according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It will be understood by those of ordinary skill in the art that the present invention may be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein, .

In addition, the sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, and the terms defined specifically in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user, operator And the definitions of these terms should be based on the contents throughout this specification.

An important component of the master key-operated valve according to the present invention is a lower body and an upper body constituting a handle for controlling the flow of fluid moving through the valve, and a disk for coupling the lower body to the valve. Hereinafter, each component will be described in more detail with reference to the following drawings.

First, the lower body 100,

Is the lower part of the handle mounted on the valve 500 for interrupting or regulating the flow of fluid moving through the valve 500.

A preferred embodiment of the lower body 100 will be described with reference to FIGS. 1, 3 and 4.

The lower body 100 has a rectangular shape and a through hole 110 is formed on one upper side in the longitudinal direction. The upper portion of the opening and closing member (not shown in the figure) passes through the through hole 110, (500) and rotates together with the lower body (100) to control the flow of fluid passing through the valve (500) or to regulate the amount of fluid flowing.

A fastening hole 120 is formed on the upper surface of the other side of the lower body 100 so that the fastening pin 150 can be inserted through the fastening hole 150 to control the rotation of the handle.

3 and 4, the coupling pin 150 is operated by being inserted into or disengaged from the disk 300 to be described later, which is coupled to the valve 500 via the vertical lift and elevation, The lower body 100 is not rotated while the coupling pin 150 is engaged and the lower body 100 is rotatable when the coupling pin 150 is separated from the disk 300. [

On the upper surface of the other side of the lower body 100, there is formed a seating groove 130 in which the slide 170 is seated to one side of the fastening hole 120.

The slide 170 that is seated in the seating groove 130 serves to lift the fastening pin 150 penetrating through the fastening hole 120 and the upward movement of the fastening pin 150 is performed by rotating the lower body 100 .

A lower end of the master key 400 is inserted into the fitting groove 140 and the lower end of the fitting groove 140 is inserted into the fitting groove 140, The master key 400 inserted into the receiving groove 140 pushes the slide 170 seated in the receiving groove 130 toward the fastening pin 150.

5 and 6, an embodiment in which the slide 170 raises the fastening pin 150 will be described.

The fastening pin 150 is provided with a fastening protrusion 151. The fastening pin 151 may be formed by partially extending outward from the outer circumferential surface of the fastening pin 150, A coupling member having a diameter greater than the diameter may be coupled to the outer circumferential surface of the coupling pin 150 at an upper portion of the coupling pin 150. As shown in the figure, So that the engaging protrusion 151 is formed by using the lower diameter difference of the outer peripheral surface of the upper portion of the engaging pin 150. [

An elastic member 160 such as a spring or a cushion member may be provided on the upper surface of the coupling pin 150. The elastic member 160 may have a compressive force when the coupling pin 150 is lifted and lowered by an external force, When the external force that lifts the fastening pin 150 is removed, the fastening pin 150 is lowered due to the restoring force of the elastic member 160.

The slider 170 is formed in a wedge shape that forms an inclined surface 173 upward as the upper surface of the slide 170 moves away from the clamping pin 150. Accordingly, The thickness gradually increases toward the side.

The slide 170 has a U-shaped groove 171 which is recessed toward the inside toward a central portion of one side of the fastening pin 150 facing toward the fastening pin 150, Centered.

When the slide 170 is moved toward the coupling pin 150 by the master key 400, the outer peripheral surface of the coupling pin 150 is fitted in the groove 171 of the slide 170, The fastening pins 150 of the fastening pins 150 are moved along the inclined surfaces 173 formed on the upper surface of the slide 170 and the fastening pins 150 are moved upward.

When the elastic member 160 provided on the fastening pin 150 is strong in raising the fastening pin 150 by moving the slide 170 by the master key 400, The movement of the slide 170 due to the insertion of the master key 400 is easy when the elastic member 160 provided on the coupling pin 150 is weak while the master key 400 It is difficult for the fastening pin 150 to return to its original state due to the elastic force.

Therefore, the present invention can enhance the operability of the master key 400 while enhancing the elasticity of the elastic member 160, thereby facilitating the movement of the slide 170. Thus, when the master key 400 is removed, (150) can be accurately returned to the original state.

In order to achieve the above object, according to the present invention, a center portion of one side of a slide 170 having a groove 171 formed therein is protruded outward, and a seating groove 130 on which the slide 170 is seated, And a second seating groove 132 in which the other side of the slide 170 is received.

Accordingly, when the slide 170 protruding outward from the center portion of one side of the first seating groove 131 and the second seating groove 132 is seated, the center portion protruding from one side of the slide 170 and the remaining portion The first and second mounting grooves 131 and 132 are in contact with the front surface of the second mounting groove 132, which is a connecting portion, respectively.

The front surface of the second seating groove 132 may be inclined or preferably curved upward to form a curved portion 133 so that the end surface of the step 170 The protruding central portion provided with the groove 171 moves along the front curved portion 133 of the second seating groove 132 when the external force is applied to the fastening pin 150, The fastening pin 150 can move upward even when the elastic member 160 provided on the fastening pin 150 has a strong elastic force.

In order to more effectively move the slide 170, the step 172 may be formed in an arcuate shape so as to be curved so as to be smoothly moved upward along the front surface of the curved second seating groove 132, The other end of the opposing slide 170 is curved so as to be curved so as to be smoothly pushed when it comes in contact with the outer circumferential surface of the master key 400 in accordance with downward movement of the master key 400 inserted into the fitting groove 140 .

The upper body (200)

Is coupled to the upper portion of the lower body 100 described above with the upper part of the handle mounted on the valve 500 to intermit or control the flow of fluid moving through the valve 500.

A preferred embodiment of the upper body 200 will be described with reference to FIGS. 1 and 2. FIG.

The upper body 200 is coupled to the lower body 100 in a shape corresponding to the upper body 100 and is coupled to one side of the upper body 200 through the through holes 110 of the lower body 100 A receiving groove 210 is formed at a predetermined depth to receive the fixing member when the upper end of the opening and closing member is inserted into the fixing member while protruding from the upper end of the opening member, The key insertion hole 220 is formed so that the slide pin 400 penetrates vertically downward to operate the slide 170 to lift the coupling pin 150. [

When the lower end of the master key 400 inserted into the key insertion hole 220 is correctly inserted into the fitting groove 140 while the key insertion hole 220 is positioned on the same line perpendicular to the fitting groove 140, The other side of the engaging pin 170 can be moved toward the engaging pin 150 accurately.

Although the master key 400 may be formed in a plate shape, the plate shape can be easily deformed during use, and when the master key 400 is deformed, insertion of the master key 400 into the key insertion hole becomes impossible, .

Therefore, the lower end of the master key 400 may have a substantially circular cross section, an elliptical cross section, a polygonal cross section, or the like, and may have a cross shape protruding outward in four directions in consideration of orientation.

When the master key 400 is formed in a cross shape, the key insertion hole 220 of the upper body 200 is also preferably formed in a cross shape corresponding to the shape of the lower end of the master key 400. However, 400 can be fitted into the fitting groove 140 of the lower body 100 without being inserted and flowing, the shape thereof can be variously modified.

The lower end of the master key 400 may have a four-sided outer circumferential surface, but it is preferable that the outer circumferential surface of the master key 400 is provided with an engaging groove 410 which is recessed inward at a point on the upper side of the lower end, It is preferable that a position where the other side of the slide 170 can be received in the latching groove 410 in a state where the lower end of the master key 400 is inserted through the key insertion hole 220 into the insertion groove 140 Do.

The disk 300 is a disk-

The rotation of the handle is controlled by connecting the lower body 100 with the upper side of the valve 500 while preventing the rotation of the lower body 100 by fastening the lower end of the lowering pin 150 .

2, 3 and 4, a shaft hole 310 is formed in the center of the disk 300 so that the opening and closing member can pass through the shaft hole 310, A plurality of pin holes 320 are formed radially outside the upper surface of the shaft hole 310. The lower end of the lower coupling pin 150 is selectively coupled to the pin hole 320, The degree of rotation of the lower body 100 is changed according to the position where the lower end of the lower body 100 is fastened and the flow rate of the flow of the fluid passing through the valve 500 can be controlled according to the degree of rotation of the lower body 100, will be.

A ball flange (not shown in the figure) is provided on one of the opposing sides of the disk 300 and the lower body 100, and a groove (not shown in the figure) in which the ball flange is resiliently detachably attached to the other. The lower body 100 may be rotated in a stepwise manner by allowing the ball flange to be elastically fitted in and removed from the groove when the lower body 100 is rotated from the fixed disk 300. [ .

A matching projection (not shown) is formed on the upper surface of the disc 300 and a matching protrusion (not shown in the figure) is formed on the lower surface of the lower body 100 so that the coupling between the lower body 100 and the disc 300 It is possible to accurately and simply assemble using the matching projections and the matching projection grooves.

The handle of the valve according to the present invention thus constituted can be operated as follows.

The valve 500, the disc 300, the lower body 100, and the upper body 200 are sequentially coupled to each other, and the valve 500, the disc 300, the combination of the lower body 100 and the upper body 200 A detailed description of the process will be omitted.

5, when the master key 400 is separated from the handle formed by coupling the lower body 100 and the upper body 200, the fastening pin 150 located inside the handle is inserted into the elastic member 160 The slide 170 is pushed in a direction opposite to the fastening pin 150 while the lower end of the fastening pin 150 is engaged with any one of the pin holes 320 of the disk 300, The longitudinal direction of the handle is the same as the longitudinal direction of the valve 500, and the fluid flows freely through the valve 500 according to the opening state of the opening and closing member.

In this state, when the handle is turned to shut off the flow of the fluid passing through the valve 500 or adjust the flow rate, the lower end of the fastening pin 150 is in a state where the pin hole of the disk 300 is engaged, .

6, the master key 400 is inserted into the key insertion hole 220 formed in the upper body of the handle so as to be inserted into the fitting groove (not shown) of the lower body 100 The other end of the slide 170 is pushed toward the coupling pin 150 by the lower end of the master key 400 so that the stepped portion 172 of the slide 170 is inserted into the second seating groove 132 So that the fastening pin 150 which is hooked on the one side groove portion 171 of the slide 170 through the fastening protrusion 151 is moved upward so that the lower end portion of the fastening pin 150 Is detached from the pin hole 320 of the disc 300. [

When the lower end of the coupling pin 150 is separated from the pin hole 320 of the disc 300, the handle can be rotated freely. For example, the handle may be rotated so that the lengthwise direction of the handle is the length of the valve 500 The valve 500 is closed by the opening and closing member and the flow rate passing through the valve 500 is blocked. When the rotation of the handle is rotated by 45 degrees, the opening / closing member is opened halfway, The flow of the flow passing through the pipe can be reduced by half.

When the handle is rotated to cut off the flow rate or to reduce the flow and then the master key 400 fitted to the handle is removed, the fastening pin 150 is lowered by the restoring force of the elastic member 160, The lower end of the lowered coupling pin 150 is inserted into the other hole 320 of the disc 300 and the rotated state of the handle can be maintained.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Therefore, the scope of the disclosed contents should not be limited to the described embodiments, but should be defined by the equivalents of the claims, as well as the following claims.

100: lower body 110: through hole
120: fastening hole 130: seat groove
131: first seating groove 132: second seating groove
133: Curved portion 140: Fitting groove
150: fastening pin 151:
160: elastic member 170: slide
171: groove portion 172:
173: sloped surface 200: upper body
210: receiving groove 220: key insertion hole
300: Disk 310:
320: pin hole 400: master key
410: latching groove 500: valve

Claims (8)

A valve installed on a channel through which a fluid flows and controlling the flow of fluid moving along the channel by rotation of a handle,
A through hole through which the upper part of the opening and closing member for opening and closing the channel of the valve is formed on one upper surface and a lower portion of a fastening pin which is lifted with an elastic force to control the rotation of the handle, The slide groove is formed on one side of the fastening hole so that the slide for raising the fastening pin can be seated. The slide is moved through the lower end of the master key inserted into the one of the seating grooves, A lower body on which a fitting groove is formed to raise the pin;
A receiving groove for receiving a fixing member for fixing an upper end of the opening and closing member protruding to the outside through the through hole is formed on one upper surface of the lower body, An upper body having a key insertion hole formed at a lower end thereof to be inserted into the fitting groove so as to move the slide; And
A shaft hole is formed at the center of the upper body to allow the upper portion of the opening and closing member to pass therethrough and a lower end of the lowering pin, At least one disk;
Wherein the valve body comprises a valve body. The method according to claim 1,
And a fastening jaw using a diameter difference is provided on the fastening pin,
The slide is formed with a groove portion which is recessed inwardly at a central portion of one side so as to be fitted to the outer circumferential surface of the lower side of the engaging jaw of the engagement pin by movement, and the other side is formed thicker than one side so as to form an upward sloping surface from one side to the other side Features a master keylock valve. 3. The method of claim 2,
A central portion of the one side of the slide is protruded outwardly,
And a second seating groove on which the other side of the slide is seated, wherein the seating groove on which the slide is seated comprises a first seating groove on which a projected central portion of the one side of the slide is seated,
And the curved portion is formed on the opposite both side surfaces of the centering portion protruding from one side of the slide and the second seating groove which is in contact with the stepped portion that is not protruding from the other side of the slide, With a master keylock valve. The method of claim 3,
Wherein the step of the slide is formed in an arcuate shape. 3. The method of claim 2,
And the other end of the slide is formed in an arcuate shape. 6. The method of claim 5,
Wherein a lower end of the master key is formed in a cross shape, and the key insertion hole is formed in a cross shape corresponding to a shape of a lower end of the master key. The method according to claim 6,
And an upper end of the protruding lower end of the master key is formed with an engaging groove recessed in a curved shape so that the other end of the slide is seated in the engaging groove when the master key is inserted into the fitting groove Features a master keylock valve. The method according to claim 1,
Wherein a ball flange is provided on an upper surface of the disk and one or more grooves selectively fitted to the ball flange are provided on a bottom surface of the lower body so that rotation of the lower body can be rotated stepwise by the ball flange Wherein the main lock-up valve comprises:
KR1020150164512A 2015-11-24 2015-11-24 Master key locking valve KR101756166B1 (en)

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KR1020150164512A KR101756166B1 (en) 2015-11-24 2015-11-24 Master key locking valve

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KR101756166B1 KR101756166B1 (en) 2017-07-11

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102162593B1 (en) * 2020-05-20 2020-10-07 한선엔지니어링 주식회사 Master key lock valve
KR102486665B1 (en) 2021-07-21 2023-01-11 주식회사 엠피테크 Valve locking apparatus of double locking structure
KR20230126958A (en) * 2022-02-24 2023-08-31 디케이국풍주식회사 Ball valve having key lock function for controlling flow

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200388434Y1 (en) 2005-04-18 2005-06-29 주식회사 비엠티 Opening and shutting valve with handle stopper
KR101377474B1 (en) 2013-12-27 2014-04-01 주식회사 유니락 Valve operated by a master-key
KR101693273B1 (en) 2015-06-18 2017-01-05 태광후지킨 주식회사 key type valve apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102162593B1 (en) * 2020-05-20 2020-10-07 한선엔지니어링 주식회사 Master key lock valve
KR102486665B1 (en) 2021-07-21 2023-01-11 주식회사 엠피테크 Valve locking apparatus of double locking structure
KR20230126958A (en) * 2022-02-24 2023-08-31 디케이국풍주식회사 Ball valve having key lock function for controlling flow

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