KR102282897B1 - Line blind valve - Google Patents

Abstract

The blind valve according to the present invention is installed between a first flange and a second flange spaced apart on a pipe line, and includes a goggle plate and a valve body supporting the goggle plate, depending on the position of the goggle plate. It is formed to implement an open or blocked state of the piping line, and the valve body includes: a flange plate formed to be fastened to the first flange; a support plate installed to be maintained at a predetermined distance with respect to the flange plate, the goggle plate being formed to be disposed between the flange plate; a first connector extending from the flange plate toward the goggle plate; a clamping unit configured to press the goggle plate against the support plate in the axial direction or to release the pressed state; a second connector extending from the support plate toward the second flange; and a ring flange formed so as to be fastened to the second flange at the end of the second connection pipe, and independently moved or rotated with respect to the second connection pipe to be able to fit with the second flange. .

Description

LINE BLIND VALVE

The present invention relates to a line blind valve.

A line blind valve is a valve installed on a pipe to move a blind plate (also called a 'blind plate') in a situation where complete shutoff is required and to block the pipe through a clamping operation.

Pipes for transporting raw materials or media are installed in chemical product carriers, gas tanks, industrial plants, and the like, through which various media such as liquids, petroleum products, solutions, chemicals, gas, water vapor, and the like flow. In order to secure safety or prevent contamination of the surroundings when an accident such as leakage from a pipe or replacement or repair work of a pipe is performed, complete blocking is essential.

The condition of opening and closing the line blind valve in the working situation is important not only for efficiency but also for securing fast safety around the piping line.

*Prior art

Korean Patent Publication No. 10-2019-0087374 (published on July 24, 2019)

International Patent Publication No. WO 95/23306 (published on Aug. 31, 1995)

Chinese Patent Publication No. 105626943 (published on June 1, 2016)

SUMMARY OF THE INVENTION An object of the present invention is to provide a line blind valve capable of reducing the fitting time for accurate positions between flanges when installing the blind valve and improving the convenience of work.

The blind valve according to the present invention is installed between a first flange and a second flange spaced apart on a pipe line, and includes a goggle plate and a valve body supporting the goggle plate, depending on the position of the goggle plate. It is formed to implement an open or blocked state of the piping line, and the valve body includes: a flange plate formed to be fastened to the first flange; a support plate installed to be maintained at a predetermined distance with respect to the flange plate, the goggle plate being formed to be disposed between the flange plate; a first connector extending from the flange plate toward the goggle plate; a clamping unit configured to press the goggle plate against the support plate in the axial direction or to release the pressed state; a second connector extending from the support plate toward the second flange; and a ring flange formed so as to be fastened to the second flange at the end of the second connection pipe, and independently moved or rotated with respect to the second connection pipe to be able to fit with the second flange. .

As an example related to the present invention, the line blind valve may further include a pressing ring disposed between the end of the first connector and the goggle plate.

As an example related to the present invention, the clamping unit may include: a plurality of screw jacks disposed along the circumferential direction of the pressing ring and formed to be able to transport the pressing ring in the axial direction by rotation; a driving unit disposed on one side of the support plate; And it may include a drive conversion unit formed to transfer the direction of the driving force by the driving unit to the plurality of screw jacks to be able to transfer the pressing ring in the axial direction at the same time according to the operation of the driving unit.

As an example related to the present invention, the line blind valve includes an expansion joint disposed between the first connection pipe and the pressure ring, and formed to provide a sealing force according to the movement of the pressure ring by expansion and contraction. may include more.

As an example related to the present invention, the screw jack may include a screw parallel to the axial direction of the pipe, and a screw disk formed to pass through the screw may be attached to the pressure ring.

As an example related to the present invention, the line blind valve may further include a sleeve disposed inside the expansion joint and extending from the pressure ring to protect an inner circumferential surface of the expansion joint.

As an example related to the present invention, an end ring constraining the ring flange may be formed at an end of the second connection pipe.

As an example related to the present invention, a plurality of flange bolt fastening holes corresponding to a plurality of fastening holes formed in the second flange may be formed in the ring flange.

As an example related to the present invention, the line blind valve may further include a plurality of stoppers having both ends respectively fastened to the flange plate and the support plate to maintain a constant distance between the flange plate and the support plate. .

As an example related to the present invention, the goggle plate has a fluid passage hole and a blind plate integrally formed therein, and a slide rail for moving the goggle plate between an open position and a closed state is attached to the support plate. can be

According to the line blind valve related to the present invention, as the configuration of the valve body having a flange plate, a support plate, a clamping unit and a ring flange, it is possible to significantly reduce the fitting time of the correct position between the flanges when the blind valve is installed, and the operation can improve the convenience of

As an example related to the present invention, it is possible to secure the stability of the sealing force during the movement of the pressure ring by installing the expansion joint in the first connection pipe.

As another example related to the present invention, the clamping unit operates the screw jack at the same time by the drive converting unit that converts the driving force of the driving unit. there is.

1 is a perspective view of a line blind valve 100 related to the present invention.
2 is a partial cross-sectional perspective view of the line blind valve 100 of FIG. 1 in a state in which the upper part is cut parallel to the xy plane.
FIG. 3 is a partial cross-sectional view showing the state in which the line blind valve 100 of FIG. 1 is installed on the piping line 10, cut parallel to the yz plane.
4 is a partial cross-sectional view showing a state in which the line blind valve 100 of FIG. 1 is installed on the piping line 10 by cutting it parallel to the xz plane.
5 is a partial cross-sectional view illustrating a state in which the goggle plate 110 is moved in FIG. 4 and the flow path is completely blocked by the clamping unit 150 .

Hereinafter, a blind valve related to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 , the line blind valve 100 includes a valve body 120 having two plates 130 and 140 disposed in parallel, and a goggle plate 110 between the plates 130 and 140 . ) is arranged in the form of This line blind valve 100 is installed between the first flange 20 and the second flange 30 spaced apart on the piping line 10, as shown in FIG. 3 to be described later, in the valve body 120. An open or blocked state of the piping line 10 may be implemented according to the position of the supported goggle plate 110 .

The valve body 120 is equipped with a flange plate 130 , a support plate 140 , and a clamping unit 150 . The flange plate 130 is fastened to the first flange 20 (see FIG. 3 ) of the piping line 10 , and a plurality of first flange bolt fastening holes 131 corresponding to the fastening holes of the first flange 20 . is formed.

The flange plate 130 may have a first connector 132 formed in the direction of the support plate 140 . An expansion joint 134 may be formed at an end of the first connector 132 , and a pressure ring 137 is installed at an end of the expansion joint 134 . The pressing ring 137 presses the goggles plate 110 in the axial direction (referring to the z-direction in Fig. 1) by the clamping unit 150. In the present disclosure, it may also be referred to as 'upper (+z-direction)' for convenience) or (Clamping) It is configured so that the pressed state can be released (unclamped).

The support plate 140 is installed to be maintained at regular intervals by a plurality of stoppers 191 having both ends fastened to the flange plate 130 . The flange plate 130 and the support plate 140 may have a substantially square shape for the support of the goggle plate 110 or the installation of the clamping unit 150 .

A second connection pipe 141 is formed on the upper portion of the support plate 140 at a position corresponding to the lower first connection pipe 132 . The second connection pipe 141 has a shape extending in the direction of the second flange 30 (see FIG. 3 ), and a ring flange 143 is installed at an end of the second connection pipe 141 . The ring flange 143 is independently moved or rotated with respect to the second connection pipe 141 at the end of the second connection pipe 141 to be able to fit with the second flange 30 . A plurality of first flange bolt fastening holes 144 are formed in the ring flange 143 to correspond to the fastening holes of the second flange 30 . The ring flange 143 is constrained by the end ring 142 formed at the end of the second connection pipe 141 . When the ring flange 143 is fastened with the second flange 30 , the end ring 142 By face-to-face pressure with respect to the second flange 30, installation and sealing work is performed. At this time, the ring flange 143 is separated from the second connection pipe 141 and the end ring 142, unlike the flange plate 130 to which the first flange bolt fastening hole 131 is fixed, so that rotation or movement is not possible. It is possible, and it is possible to easily fit the fastening hole of the second flange 30 to which the installation position is fixed. That is, when the flange is fixed to the second connection pipe 141, it is difficult to align all of the flange bolt fastening holes to the first flange 20 and the second flange 30 at the same time when installing or replacing the ring flange 143. ) can be solved by being separated with respect to the second connection pipe 141 and the end ring 142.

When the pressure state by the pressure ring 137 is released, the goggles plate 110 is movable in the x direction. The goggle plate 110 has a form in which the blind plate part 111 and the fluid passage hole 113 are formed, respectively, and the seals 112 and 114 are respectively formed around the blind plate part 111 and the fluid passage hole 113 . ) is provided. These seals 112 and 114 are provided on both the upper and lower surfaces of the goggle plate 110 (see FIGS. 3 to 5 ). The goggles plate 110 may have a form in which the blind plate part 111 and the fluid passage hole 113 are integrally formed by one plate. A slide rail 138 for moving the goggle plate 110 between an open position and a closed state may be attached to the support plate 140 to guide the x-direction movement of the goggle plate 110 . . The slide rail 138 may have a simple guide groove or may include a rotating body such as a ball or a roller. For convenience of movement of the goggle plate 110 , a moving handle 115 may be provided at both ends or one end of the goggle plate 110 .

The clamping unit 150 is disposed along the circumferential direction of the pressing ring 137 and includes a plurality of screw jacks 180A, 180B, 180C, 180D, which are formed to be able to transport the pressing ring 137 in the axial direction by rotation, and support. The driving unit 160 disposed on one side of the plate 140, and the direction of the driving force by the driving unit 160 is switched and transmitted to the screw jacks 180A, 180B, 180C, 180D at the same time according to the operation of the driving unit 160 A drive conversion unit 170 for transferring the pressing ring 137 in the axial direction may be provided.

The driving unit 160 may include a manual handle 161 (refer to FIG. 3 ) or, in some cases, a motor and a reduction gear unit. The drive conversion unit 170 includes a gear unit that converts the output from the driving unit 160 into rotation of the first direction shafts 171A and 171B, and a second direction axis ( 172A, 172B) may include a gear unit for converting the rotation. These gears may utilize a bevel gear or the like for changing the direction.

The rotation of the second direction axes (172A, 172B) is converted into rotation of the screw jacks (180A, 180B, 180C, 180D). The screw jacks 180A, 180B, 180C, and 180D may include a worm gear for converting the rotation of the second direction shafts 172A and 172B. The screw jacks 180A, 180B, 180C, and 180D have screws 181 parallel to the axial direction of the pipe. The pressure ring 137 is provided with a screw disk 139 formed so that the screw 181 can be screwed through.

By this clamping unit 150, when the user rotates the handle 161 and operates, the rotational force is applied to the screw jacks 180A and 180B through the first direction shafts 171A and 171B and the second direction shafts 172A and 172B. , 180C, 180D). By the simultaneous rotation of the screws 181 included in each screw jack 180A, 180B, 180C, 180D, the pressing ring 137 is moved in the axial direction (z direction), and the goggle plate 110 is mounted on the support plate 140 . ) can be pressurized or, conversely, the pressurized state can be released. The driving unit 160 may include a torque limiting element to prevent damage to parts or members by transmitting a fastening force up to a reference torque.

Referring to FIG. 3 , the expansion joint 134 is formed between the first connection pipe 132 and the pressure ring 137 , and provides a sealing force according to the movement of the pressure ring 137 by expansion and contraction. The expansion joint 134 is a bellows shape having a plurality of corrugated grooves, and may be formed by corrugation processing on a metal plate. The sleeve 135 may be included inside the expansion joint 134 to extend from the pressure ring 137 to protect the inner peripheral surface of the expansion joint 134 . The sleeve 135 can reduce the inflow of particles or solid elements or adhesive substances contained in the medium flowing through the piping line 10, such as the corrugated groove of the expansion joint 134, and extend the life and replacement cycle of the equipment. .

Hereinafter, the installation and opening/closing action of the line blind valve 100 related to the present invention will be described. 3 to 5 , the line blind valve 100 is installed between the first flange 20 and the second flange 30 . In a state in which the flange plate 130 is fastened to match the first flange 20 , the ring flange 143 is rotated to easily match the fastening holes of the second flange 30 and the ring flange 143 .

4 shows a state in which the line blind valve 100 is opened, the fluid in the pipe line 10 may pass through the fluid passage hole 111 of the goggle plate 110 . In order to block the line blind valve 100 for the purpose of an emergency or inspection on the piping line 10, the driving unit 160 constituting the clamping unit 150 is operated to operate the pressure ring 137 for the goggle plate 110. Release the pressurized state. In this process, the expansion joint 134 is contracted while maintaining the sealed state. In a state in which the pressure is released, the user moves the goggles plate 110 so that the blind plate part 111 coincides with the central axis of the pipe line 10 . When the driving unit 160 is operated again in this state, the pressure ring 137 presses the goggle plate 110 by the action of the clamping unit 150 to completely block the pipe line 10 ( FIG. 5 ).

For the line blind valve described above, the configuration and method of the described embodiments are not limitedly applied. The above embodiments may be configured by selectively combining all or part of each of the embodiments so that various modifications can be made.

10: piping line 20: first flange
30: second flange 100: line blind valve
110: goggles plate 111: blind plate part
113: fluid passage hole 112, 114: sealing
120: valve body 130: flange plate
131: first flange bolt fastening hole 132: first connector
134: expansion joint 135: sleeve
137: pressure ring 138: slide rail
139: screw disk 140: support plate
141: second connector 142: end ring
143: ring flange 144: second flange bolt fastening hole
150: clamping unit 160: drive unit
161: manual handle 170: drive conversion unit
171A, 171B: first direction axis 172A, 172B: second direction axis
180, 180A, 180B, 180C, 180D: screw jack
191: stopper

Claims (10)

A state in which the pipe line is opened or blocked depending on the position of the goggle plate, installed between the first flange and the second flange spaced apart on the pipe line, and provided with a goggle plate and a valve body supporting the goggle plate is formed to implement
The valve body is
a flange plate formed to be fastened to the first flange;
a support plate that is installed to be maintained at a predetermined distance with respect to the flange plate, and is formed so that the goggle plate can be disposed between the flange plate and the flange plate;
a first connector extending from the flange plate toward the goggle plate;
a clamping unit configured to press the goggle plate in an axial direction with respect to the support plate or to release the pressed state;
a second connector extending from the support plate toward the second flange;
a ring flange formed so as to be fastened to the second flange at the end of the second connection pipe, and independently moved or rotated with respect to the second connection pipe to be able to fit with the second flange; and
and a pressing ring disposed between the end of the first connector and the goggle plate,
The clamping unit is
a plurality of screw jacks disposed along the circumferential direction of the pressing ring and formed to be able to transport the pressing ring in the axial direction by rotation;
a driving unit disposed on one side of the support plate; and
Containing a drive conversion unit formed to transfer the direction of the driving force by the driving unit to the plurality of screw jacks to simultaneously transfer the pressing ring in the axial direction according to the operation of the driving unit,
A line blind valve disposed between the first connection pipe and the pressure ring and provided with an expansion joint formed to provide a sealing force according to the movement of the pressure ring by expansion and contraction.
delete delete delete According to claim 1,
The screw jack includes a screw parallel to the axial direction of the pipe,
A line blind valve having a screw disk formed so that the screw is screwed to the pressure ring to pass therethrough.
According to claim 1,
The line blind valve is disposed on the inside of the expansion joint, and further comprises a sleeve extending from the pressure ring to protect the inner circumferential surface of the expansion joint.
According to claim 1,
An end ring constraining the ring flange is formed at an end of the second connection pipe, a line blind valve.
8. The method of claim 7,
A plurality of flange bolt fastening holes corresponding to a plurality of fastening holes formed in the second flange are formed in the ring flange, a line blind valve.
According to claim 1,
The line blind valve further comprising a plurality of stoppers having both ends respectively fastened to the flange plate and the support plate to maintain a constant distance between the flange plate and the support plate.
According to claim 1,
The goggle plate is integrally formed with a fluid passage hole and a blind plate,
A slide rail is attached to the support plate for moving the goggle plate between an open position and a closed position.

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