KR20110095767A - Dual ball valve for flow control - Google Patents

Dual ball valve for flow control Download PDF

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Publication number
KR20110095767A
KR20110095767A KR1020100015416A KR20100015416A KR20110095767A KR 20110095767 A KR20110095767 A KR 20110095767A KR 1020100015416 A KR1020100015416 A KR 1020100015416A KR 20100015416 A KR20100015416 A KR 20100015416A KR 20110095767 A KR20110095767 A KR 20110095767A
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KR
South Korea
Prior art keywords
ball
valve
sub
main
valve ball
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Application number
KR1020100015416A
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Korean (ko)
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KR101165366B1 (en
Inventor
배태성
이권희
Original Assignee
동아대학교 산학협력단
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Priority to KR20100015416A priority Critical patent/KR101165366B1/en
Publication of KR20110095767A publication Critical patent/KR20110095767A/en
Application granted granted Critical
Publication of KR101165366B1 publication Critical patent/KR101165366B1/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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • 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
    • F16K31/53—Mechanical actuating means with toothed gearing
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/10—Means for additional adjustment of the rate of flow

Abstract

PURPOSE: A double ball valve for flow control is provided to easily control flow rate to the preset value because a sub valve call is installed inside a main valve ball so that the main and sub valve balls are independently operated. CONSTITUTION: A double ball valve for flow control comprises a valve body, a main valve ball, a sub valve ball(40). The valve body has a longitudinal internal passage. The main valve ball comprises an opening(32) formed from the front to the back and is arranged in the internal passage of the valve body. The sub valve ball is located inside the main valve ball and has a first opening(42) formed from the front to the back corresponding to the opening of the main valve ball and a second opening(44) formed from side to side with a smaller diameter than the opening of the main valve ball.

Description

Dual ball valve for flow control

The present invention relates to a double ball valve for flow control, and more particularly to a double ball valve for flow control to adjust the flow rate while the valve ball is formed in the inner and outer double to operate independently.

Valves are used in various pipes to adjust the flow rate or pressure of the fluid in the pipe, or as a mechanical element to control the flow of the fluid, various types of valves are selected and used according to the pipe conditions or the functions required in the pipe.

A ball valve, which is a type of such valve, is a ball having a circular through hole as a factor for controlling the flow rate, and the ball is used as a fluid flow path. It rotates according to the rotation of the stem installed in the direction perpendicular to the through hole.

Here, the stem may include a driving mechanism such as a manual lever, a manual gearbox, a manual gear with chain wheel, a pneumatic actuator, and an electric actuator. It is connected to induce the rotation of the ball according to the operation of the drive mechanism, the ball installed in the ball valve is also referred to as valve ball.

As a technology related to such a ball valve, Korean Laid-Open Patent Publication No. 10-2001-0009678 "Double Blocking and Opening Device of Ball Valve", Registration Utility Model Publication No. 20-0418253 "Flow Control Ball Valve" The back is raised.

The "double blocking and opening device of the ball valve" is rotatably installed inside the ball operation space of the valve body and a pair of valve balls are formed to be symmetrical from the center and inserted into the inner peripheral surface of the flange pipe on both sides of the valve body, respectively And a seat ring having an airtight seat for contacting the outer circumferential surface of the pair of valve balls, a stem rising and falling to open and close the pair of valve balls as the manual operation handle is rotated, and the pair of Elastic means is installed between the valve ball to provide an elastic restoring force during the operation of the valve ball, and the gas is leaked from high pressure to low pressure when the pair of valve ball is installed in a closed state of the lower side of the valve body And a bleed valve for removing residual pressure therein. It is possible to reduce the number of installation of the ball valve installed to perform the function to reduce the manufacturing cost of the facility, as well as to reduce the assembly time during installation. In addition, the "flow control ball valve" is installed in the center of the flow path on both sides of the valve body, the ball is provided with a through hole, the stem engaged in the direction perpendicular to the flow path of the ball upward, the handle fixed integrally with the stem and In the flow control ball having a seat ring which is installed at the contact surface of the ball and the flow path so as to provide a gas tight seal between the ball and the valve body, the flow rate of the through hole of the ball overlapping the flow path is proportional to the rotation angle of the ball. It is a fine adjustment.

On the other hand, the conventional ball valve as described above allows the maximum allowable flow rate to flow in a full open state when the through hole of the valve ball and the flow path is matched, and the flow path of the through hole of the valve ball and the fluid Set to 90 ° to prevent the fluid from flowing when the ball valve is in full close.

When the flow rate of the fluid flowing through the ball valve needs to be adjusted, the valve ball is rotated at a predetermined angle so that the through-hole of the ball and the flow path of the fluid are partially opened to form an angle of 90 ° or less.

However, the conventional ball valve as described above has a structure for adjusting the flow rate by adjusting the rotation angle of the valve ball, so that the valve ball rotates at a predetermined angle to achieve a predetermined angle of the flow path of the fluid and the through hole of the valve ball. When the valve ball is subjected to a high pressure due to the fluid resistance there was a problem that the flow rate adjustment is not made properly because it can not maintain the exact position and sealing state.

In particular, if the flow control of the fluid through the ball valve is 1) opening and closing of the pipe, 2) the flow rate of the fluid passing through the ball valve to have two numerical values, as required on the pipe, the conventional ball valve The flow control of 1) is stable and easy, but the flow control of 2) could not be performed properly due to the unstable arrangement of the valve ball which is put in a high pressure state as described above.

Therefore, the present invention improves the problems of the prior art, the valve ball is made of a double of the main valve ball and the sub-valve ball, the sub-valve ball is installed inside the main valve ball is the main valve ball and the sub-valve ball It is an object of the present invention to provide a new type of flow control double ball valve that can be easily and easily made to adjust the flow rate to a predetermined numerical value by allowing the flow rate to be controlled independently.

Particularly, in the present invention, a first entrance having the same diameter as the entrance of the main valve ball and a second entrance having a diameter smaller than the entrance of the main valve ball are formed in the sub valve ball so that the entry of the entrance and the sub valve ball of the main valve ball is achieved. It is an object of the present invention to provide a new type of double ball valve for flow control, in which the flow rate can be precisely controlled by two flow rate values set through the two inlets.

According to a feature of the present invention for achieving the above object, the present invention provides a ball valve, the valve body formed with a through passage in the front and rear direction; A main valve ball formed to pass through each other in front and rear with a predetermined diameter and disposed on a passage of the valve body; Located in the main valve ball, the first inlet corresponding to the inlet and outlet of the main valve ball are formed so as to pass through each other in the front and rear with the same diameter, the second inlet of the diameter smaller than the inlet of the main valve ball on both sides Including the sub-valve ball formed to penetrate each other, the flow rate of the fluid passing through the through passage of the valve body in accordance with the opening and closing operation to the main valve ball and the sub-valve ball operated independently of each other, characterized in that do.

The main valve ball and the sub-valve ball in the flow control dual ball valve according to the present invention is connected to the main stem and the sub stem are installed on the valve body spaced apart from each other, the main stem rotates the main valve ball And a sub drive mechanism for rotating the sub valve ball.

The main valve ball in the flow rate dual ball valve according to the present invention is formed so that the main stem fixing groove and the sub stem through-hole are spaced apart from each other so that the main stem is fixed to the main stem fixing groove, the sub stem The stem is rotatably penetrated through the through hole, and the main valve ball rotates integrally with the main stem, but the rotational force of the sub stem is not transmitted.

The main stem fixing groove of the main valve ball has a polygonal cross section, and the sub stem through-hole of the main valve ball has a circular cross section.

The sub-valve ball in the flow rate dual ball valve according to the present invention is characterized in that the sub-stem fixing grooves are formed in which the stem is fixed so that the sub-valve ball rotates integrally with the sub stem.

In the double ball valve for flow rate adjustment according to the present invention as described above, the main valve ball is characterized in that a plurality of partitions are detachably coupled to each other.

In the double ball valve for flow rate adjustment according to the present invention, the main valve ball is made by combining a pair of partitions having a predetermined thickness of which the outer circumferential surface and the inner circumferential surface are hemispherical (半球形 像), the pair of partitions It is characterized in that the fitting projection and the fitting groove forming a concave-convex relationship on the surface to be coupled to each other are fitted to each other.

In the flow control dual ball valve according to the present invention, each of the partitions forming the main valve ball are formed by bolt holes penetrating through the surfaces coupled to each other are coupled to each other by a fastening bolt inserted into the bolt hole. .

According to the dual ball valve for flow control according to the present invention, the dual valve of the main valve ball and the sub-valve ball operated independently of each other has the effect that the operation to adjust the flow rate to a predetermined numerical value is easy and stable. .

In addition, the present invention is to control the flow rate by the opening and closing operation of the main valve ball and the sub-valve ball is the valve ball is damaged by the fatigue load of high pressure, or the sealing between the valve body and the valve ball weakens the phenomenon of fluid leakage As it is prevented has the effect of increasing the durability of the ball valve.

In addition, the present invention can accurately control the flow rate at the flow rate of the predetermined numerical value.

1 is an external view of a double ball valve for flow control according to a preferred embodiment of the present invention;
Figure 2 is a cross-sectional view of the double ball valve for flow control in accordance with a preferred embodiment of the present invention;
Figure 3 is an exploded perspective view of the main valve ball and the sub-valve ball constituting the double ball valve for flow control according to an embodiment of the present invention;
Figure 4 is a view for showing a closed state flow control double ball valve in accordance with a preferred embodiment of the present invention;
5 is a view for showing a state in which the double ball valve for adjusting the flow rate in accordance with the preferred embodiment of the present invention;
Figure 6 is a view for showing a partially open state of the double ball valve for flow control in accordance with a preferred embodiment of the present invention.

The double ball valve 100 for adjusting the flow rate of the present invention is installed in the pipe so that the flow rate of the fluid flowing through the pipe is adjusted. In particular, the double ball valve 100 for adjusting the flow rate of the fluid passing through the pipe This is applied when it is necessary to have a flow rate of two numerical values determined as necessary.

The double ball valve 100 for adjusting the flow rate according to the present invention is formed in the form of a double ball valve of the main valve ball 30 and the sub-valve ball 40, the sub-valve ball (the inside of the main valve ball 30) 40 is installed is characterized in that the main valve ball 30 and the sub-valve ball 40 is independently operated so that the flow rate adjustment is made.

In particular, the first entrance 42 having the same diameter as the entrance 32 of the main valve ball 30 and the second entrance 44 having a diameter smaller than the entrance 32 of the main valve ball 30 are the sub-valve ball. It is formed in the 40 is characterized in that the flow rate is adjusted to the two flow rate values set through the inlet 32 of the main valve ball 30 and the second inlet 44 of the sub-valve ball 40 . Accordingly, unlike the conventional ball valve that controls the flow rate by adjusting the rotation angle of the valve ball, the fluid resistance added to the valve ball 30, 40 is minimized to maintain the correct position of the valve ball 30, 40, As the sealing between the valve body 10 and the valve ball 30 and 40 is maintained stably, the flow rate can be accurately adjusted. In addition, damage to the valve body 10 or the valve ball 30, 40 due to the repeated addition of excessive pressure is also minimized.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 6. On the other hand, in the drawings and detailed description showing and referring to the configuration and operation easily understood by those skilled in the art from a general valve or ball valve is briefly or omitted. In particular, in the drawings and detailed description of the drawings, detailed descriptions and illustrations of specific technical configurations and operations of elements not directly related to technical features of the present invention are omitted, and only the technical configurations related to the present invention are briefly shown or described. It was.

1 is an external view of a double ball valve for flow control according to a preferred embodiment of the present invention, Figure 2 is a cross-sectional view of a double ball valve for flow control according to a preferred embodiment of the present invention, Figure 3 is a preferred embodiment of the present invention 5 is an exploded perspective view of the main valve ball and the sub-valve ball forming the double ball valve for controlling the flow rate, FIG. 4 is a view for showing a closed state of the double ball valve for controlling the flow rate according to the preferred embodiment of the present invention. FIG. 6 is a view illustrating an open state of the double ball valve for flow control according to the preferred embodiment of the present invention, and FIG. 6 is a partial open state of the double ball valve for adjusting the flow rate according to the preferred embodiment of the present invention. Drawing.

The dual ball valve 100 for adjusting the flow rate according to the preferred embodiment of the present invention includes a valve body 10, a main valve ball 30, and a sub valve ball 40 as shown in FIGS. 1 and 2.

The valve body 10 constitutes the body of the ball valve 100, such a valve body 10 and the main valve ball 30 and the through-hole 12 formed in the front and rear direction of the valve body 10 The sub valve ball 40 is arranged.

In addition, the main stem 20 and the sub stem 22 are installed in the valve body 10 so as to be spaced apart from each other, and the main stem 20 is connected to the main valve ball 30, and the sub stem 22 is the sub valve. It is connected to the ball 40. Here, the main stem 20 according to the preferred embodiment of the present invention is installed on the upper portion of the valve body 10, the sub-stem 22 is installed on the lower portion of the valve body 10.

This main stem 20 is coupled to the main drive mechanism for rotating the main valve ball 30, the sub stem 22 is coupled to the sub drive mechanism for rotating the sub valve ball 40, the main drive As the mechanism and the sub-drive mechanism, a manual lever, a gearbox, a gearbox with a chain wheel, a pneumatic actuator, an electric driver, and the like can be used.

The main valve ball 30 is disposed on the through passage 12 of the valve body 10, and the entrances 32 having a predetermined diameter are formed to penetrate each other in the front and rear, and the sub inside the main valve ball 30 The valve ball 40 is positioned.

Here, a sealing hole may be installed between the outer circumferential surface of the main valve ball 30 and the inner circumferential surface of the valve body 10 to prevent the fluid from leaking between the main valve ball 30 and the valve body 10.

In addition, the main stem fixing groove 34 and the sub stem through hole 36 are formed to be spaced apart from each other in the main valve ball 30 so that the main stem 20 is fixedly coupled to the main stem fixing groove 34, and the sub The stem 22 may be coupled to the sub valve ball 40 through the sub stem through hole 36.

 Here, in the main valve ball 30 according to the preferred embodiment of the present invention, the main stem fixing groove 34 has a polygonal cross section, and the sub stem through hole 36 has a circular cross section, whereby the main stem ( 20 is fixed to the main stem fixing groove 34 of the main valve ball 30 to rotate integrally with the main valve ball 30, while the sub-stem 22 is rotatable to the sub stem through-hole 36 In this way, the rotational force of the stem 22 is not transmitted to the main valve ball 30.

On the other hand, the main valve ball 30 is a plurality of partitions are detachably coupled to each other made of a prefabricated, which is to allow the sub-valve ball 40 to be installed inside the main valve ball (30).

To this end, the main valve ball 30 according to a preferred embodiment of the present invention is composed of a pair of divided parts having a predetermined thickness of the outer peripheral surface and the inner peripheral surface of the hemispherical shape (半球形 像) as shown in FIG. You lose.

Here, the pair of partitions constituting the main valve ball 30 has a fitting protrusion 38b and a fitting groove 38a forming a concave-convex relationship on the surfaces coupled to each other to be fitted to each other.

On the other hand, when each of the partitions constituting the main valve ball 30 is a predetermined thickness or more, bolt holes penetrating through the surface where the respective partitions are coupled to each other may be formed so that the respective partitions are coupled to each other by a fastening bolt inserted into the bolt hole. .

The sub valve ball 40 is formed such that the first entrances 42 corresponding to the entrances and exits 32 of the main valve ball 30 pass through each other in the front and rear with the same diameter, and the entrance and exit 32 of the main valve ball 30. The smaller diameter second inlet 44 is formed to penetrate each other in both sides to induce the flow of the fluid through the second inlet 44 to control the flow rate of the ball valve 100.

In addition, the sub valve ball 40 is formed with a sub stem fixing groove 46 to which the sub stem 22 penetrating the sub stem through hole 36 of the main valve ball 30 is formed. Rotate integrally.

Here, the sub-valve ball 40 according to a preferred embodiment of the present invention consists of a hollow sphere having a predetermined thickness of which the outer circumferential surface and the inner circumferential surface form a spherical shape.

Such a sub-valve ball 40 is the main valve ball 30 and the main valve ball 30 is combined with each of the divided parts of the main valve ball 30 in a state located inside the main valve ball 30 made of a prefabricated as shown in FIG. The valve ball made of a dual structure of the sub-valve ball 40 is to be manufactured.

In addition, a sealing hole may be formed between the inner circumferential surface of the main valve ball 30 and the outer circumferential surface of the sub valve ball 40 to prevent leakage of fluid between the main valve ball 30 and the sub valve ball 40.

Dual ball valve 100 for adjusting the flow rate according to the preferred embodiment of the present invention configured as described above is the inlet 32 of the main valve ball 30 through the passage 12 of the valve body 10 as shown in FIG. The through passage 12 of the valve body 10 can be closed by forming an angle of 90 ° with the main body. In this case, the main stem 20 is rotated by the main drive mechanism to induce rotation of the main valve ball 30. Done.

Then, as shown in FIG. 5, the through passage 12 of the valve body 10 is completely disposed by arranging the inlet 32 of the main valve ball 30 and the through passage 12 of the valve body 10 in a straight line. In this case, the main stem 20 is rotated by the main drive mechanism to induce rotation of the main valve ball 30, while the sub stem 22 is also rotated by the sub drive mechanism while the main valve ball ( The entrance 32 of the 30 and the first entrance 42 of the sub valve ball 40 are arranged in a straight line.

In addition, as shown in FIG. 6, the main valve ball 30 is rotated at an angle of 90 ° in the state of FIG. 5 while the main valve ball 30 is fully opened, so that the second entrance 44 of the sub valve ball 40 may be rotated. ) May be in line with the through passage 12 of the valve body 10, in this case, the flow control double ball valve 100 in accordance with a preferred embodiment of the present invention is a sub-valve ball 40 as a partially open state The fluid flows at a flow rate corresponding to the diameter of the second entrance 44 of the.

To this end, the sub stem 22 rotates independently of the main stem 20 so that the second entrance 44 of the sub valve ball 40 forms a straight line with the passage 12 of the valve body 10.

As described above, the ball valve 100 of the present invention has a flow rate value that is allowed by the inlet and outlet 32 of the main valve ball 30, and a flow rate value that is allowed by the second inlet 44 of the sub-valve ball 40. While the flow rate according to the diameter of the inlet and outlet 32 of the main valve ball 30 and the flow rate according to the diameter of the second inlet 44 of the sub-valve ball 40 are selectively allowed, the flow rate is adjusted. The main valve ball 30 and the sub valve ball 40 are not disposed to be inclined in the through passage 12 of the valve body 10, but are in a line with the through passage of the valve body 10 or at an angle of 90 °. As a result, the fluid resistance added to the valve balls 30 and 40 is minimized to maintain the correct positions of the valve balls 30 and 40, while the valve body 10 and the valve ball 30 and 40 are maintained. Not only the sealing is kept stable, but also the flow rate is adjusted precisely.

As described above, the dual ball valve for adjusting the flow rate according to the embodiment of the present invention is shown in accordance with the above description and drawings, but this is merely described, for example, and various changes and changes without departing from the technical spirit of the present invention. Those skilled in the art will appreciate that changes are possible.

10: valve body 12: through passage
20: main stem 22: sub stem
30: main valve ball 32: entrance
34: main stem fixing groove 36: sub stem through hole
38a: fitting groove 38b: fitting protrusion
40: sub valve ball 42: first entrance
44: Exit 2 46: Sub stem fixing groove
100: ball valve

Claims (8)

In the ball valve,
A valve body having a through passage formed in front and rear directions;
A main valve ball formed to pass through each other in front and rear with a predetermined diameter and disposed on a passage of the valve body;
Located inside the main valve ball, the first inlet corresponding to the inlet and outlet of the main valve ball is formed so as to pass through each other in the front and rear with the same diameter, the second inlet of the diameter smaller than the inlet of the main valve ball on both sides Including a sub-valve ball formed to penetrate each other,
Dual flow valve for flow control, characterized in that the flow rate of the fluid passing through the passage of the valve body in accordance with the opening and closing operation to the main valve ball and the sub-valve ball operated independently of each other. The method of claim 1,
The main valve ball and the sub valve ball is connected to the main stem and the sub stem are installed on the valve body spaced apart from each other,
The main stem is coupled to the main drive mechanism for rotating the main valve ball, the sub stem is coupled to the sub drive mechanism for rotating the sub valve ball flow rate dual ball valve. The method of claim 2,
The main valve ball is formed so that the main stem fixing groove and the sub stem through hole are spaced apart from each other so that the main stem is fixedly coupled to the main stem fixing groove, and the sub stem penetrates rotatably through the sub stem through hole. So,
The main valve ball is rotated integrally with the main stem, the rotational force of the sub stem is characterized in that the transmission is not received. The method of claim 3, wherein
The main stem fixing groove of the main valve ball has a polygonal cross section, and the sub stem through hole of the main valve ball has a circular cross section, characterized in that the double ball valve for flow control. The method of claim 2,
The sub-valve ball is a flow control dual ball valve, characterized in that the stem is fixed to the stem is fixed to the stem to the sub-valve ball to rotate integrally with the sub. The method of claim 1,
The main valve ball is a double ball valve for adjusting the flow rate, characterized in that the plurality of partitions are formed to be removable from each other. The method of claim 6,
The main valve ball is made by combining a pair of divided parts having a predetermined thickness consisting of a hemispherical shape of the outer peripheral surface and the inner peripheral surface (半球形 像),
The pair of splits is a double ball valve for adjusting the flow rate, characterized in that the fitting projections and the fitting grooves are formed to form a concave-convex relationship on the surfaces coupled to each other. The method according to claim 6 or 7,
Each of the partitions constituting the main valve ball is a double ball valve for adjusting the flow rate, characterized in that each of the bolt holes penetrating through the surface coupled to each other are coupled by a fastening bolt inserted into the bolt hole.
KR20100015416A 2010-02-19 2010-02-19 Dual ball valve for flow control KR101165366B1 (en)

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Application Number Priority Date Filing Date Title
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KR101165366B1 KR101165366B1 (en) 2012-07-12

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109058502A (en) * 2018-09-19 2018-12-21 浙江中德自控科技股份有限公司 A kind of solid powder regulation ball valve that sealing effect is good
KR102092314B1 (en) * 2018-10-10 2020-03-24 고등기술연구원연구조합 Ball valve assembly with double ball structure and method of operating the same
KR102605974B1 (en) * 2022-06-24 2023-11-29 인지컨트롤스 주식회사 Separable type ball valve

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KR101601846B1 (en) * 2014-10-08 2016-03-09 동아대학교 산학협력단 Dual ball valve assembly for flow control
KR101601850B1 (en) * 2014-10-08 2016-03-09 동아대학교 산학협력단 Dual ball valve assembly
KR102325058B1 (en) * 2019-02-25 2021-11-12 인제대학교 산학협력단 Negative pressure drain device with flow control valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52111434U (en) * 1976-02-20 1977-08-24
JPS59132955U (en) * 1983-02-25 1984-09-06 株式会社川電機器製作所 valve
JP2006300252A (en) * 2005-04-22 2006-11-02 Yamatake Corp Method of manufacturing ball for ball valve, ball for ball valve, and ball valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109058502A (en) * 2018-09-19 2018-12-21 浙江中德自控科技股份有限公司 A kind of solid powder regulation ball valve that sealing effect is good
KR102092314B1 (en) * 2018-10-10 2020-03-24 고등기술연구원연구조합 Ball valve assembly with double ball structure and method of operating the same
KR102605974B1 (en) * 2022-06-24 2023-11-29 인지컨트롤스 주식회사 Separable type ball valve

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