KR102068053B1 - Safe line-stopping method using folding type blocking device having a pressure assist function - Google Patents

Abstract

A safe line-stopping (SLS) method using a foldable blocking device having a pressure control function is a line-stopping method using a fluid blocking device to block a pipeline at an arbitrary position to maintain the pipeline in which a fluid flows such as a water pipe, a sewer pipe, a heat pipe, and an oil pipeline. The SLS method comprises a fluid blocking step (S10), a pipe cutting step (S20), a spring pressure control step (S30), a pipe work step (S40), a blocking head traction step (S50), and an equipment removal step (S60). The SLS method using a foldable blocking device having a pressure control function resolve a problem where the blocking head is inserted into a pipe in a process of blocking a deformed pipe. A problem where a pipe is damaged by an insertion roller in a process of forcibly inserting the blocking head into a severely deformed pipe is not caused. The pressure of the insertion roller can be controlled even after the blocking head is inserted into the pipe.

Description

Safety line-stopping method using folding type blocking device having a pressure assist function

The present invention relates to a line-stopping method using a fluid shutoff device that blocks a pipeline at an arbitrary position for maintenance of a pipeline through which fluid flows, such as a water supply pipe, a sewer pipe, a heat pipe, an oil pipe, and the like. In a line stopping method using a fluid shut-off device having a head, the present invention relates to a line stopping method made safe by improving the structure of the folding type blocking head.

The line-stopping method of blocking the flow of fluid at any point in the pipe uses a fluid shutoff device that closes the pipe by inserting a blocking head into the pipe.

The fluid shutoff device has a shutoff head inserted into a pipe to block a fluid, and the shutoff head has various shapes and structures such as a pivotal shutoff head, a folding shutoff head, and a deployment plate shutoff head.

By using a fluid shutoff device with a shutoff head as described above, some sections of various pipelines where fluid flows, such as water pipes, district heating pipes, and oil pipelines, are temporarily blocked, but the pipes are maintained without affecting the fluid supply state of the pipelines. It is a repairable method.

The pivot type blocking head is a blocking head which is formed in a disc shape of the blocking head itself, also called a 'cylinder head'.

An example of such a pivotal blocking head is disclosed in application no. 10-2009-0128166, "Fluiding device with slide type double stopper."

The pivotal blocking head has a disc shape that allows the blocking head to be in close contact with the inner diameter surface of the pipe to be blocked.

Therefore, the insertion opening formed to insert the blocking head into the pipe must be formed to be the same size as the diameter of the pipe.

On the other hand, the folding type blocking head is most widely used to solve the problem that the insertion hole must be formed in the same size as the diameter of the pipe in the case of the pivot type blocking head.

Such a folding type blocking head has an advantage of being inserted in a folded state when inserted into a pipe so that the insertion hole can be formed relatively smaller than the diameter of the pipe.

An example of such a folding shut-off head is disclosed in Application No. 10-2010-0047151, "A fluid shutoff device inside a pipe."

Similar to the folding type blocking head, the development plate type blocking head is to solve the problem of having to insert the insertion hole into the same size as the diameter of the pipe in the case of the conventional pivot type blocking head so that the plurality of development plates can be unfolded or folded in an annular manner. There is an advantage that the insertion port can be formed relatively smaller than the diameter of the pipe.

An example of such a deployment plate-type blocking head is disclosed in Patent Application No. 10-2006-0138029 'Plumber Blocker'.

Referring to the problem of the conventional fluid blocking method using the folding type blocking head as an example, a diagram for explaining the cause of the deformation of the pipe in the ground and FIG. 2 problem of fluid blocking using the blocking head of the conventional folding type blocking device As shown in the figure for explaining, in the case of the water supply pipe is generally buried in the ground due to the general relationship, as shown in FIG. 1, the pipe 1 buried in the ground is subjected to earth pressure.

The earth pressure acting on the pipe 1 thus deforms the shape of the pipe.

Normal piping is round, so the height (H) and width (W) of the pipe is the same.

However, the pipe 1 pressed by earth pressure and deformed in shape has a height H lower than that of a normal pipe, and a width W becomes larger than that of a normal pipe.

Thus, when the fluid blocking method is applied to the pipe 1 deformed by the earth pressure causes various problems. In particular, the blocking head 3 of the conventional folding type block device as shown in FIG. 2 is manufactured to fit the inner diameter size of the pipe 1. For example, the blocking head 3 for blocking the 900mm pipe 1 is manufactured to have a size capable of blocking the 900mm pipe in a round shape.

Therefore, when the blocking head 3 of the folding type blocking device 2 is inserted into the pipe 1 deformed due to the earth pressure, the height of the pipe 1 deformed by the earth pressure, as shown in FIG. (H) becomes lower and the width (W) becomes wider, which causes a problem that the insertion of the blocking head 3 does not become severe in severe cases, and causes the big problem that the blocking head 3 does not fall into the pipe even when inserted. do.

Particularly, the pipe deformed by the insertion roller 31 coupled to the front end of the blocking head 3 so that the blocking head 3 can be inserted into the pipe 1 in a smoothly inserted state and pressed. 1) the blocking head 3 may be inserted into the pipe 1 while making the circular shape to some extent, but in this process, if the pressure is applied to the pipe 1 by force, the pipe is inserted by the insertion roller 31. (1) is broken, and this causes the problem that the blocking head 3 is fitted into the pipe 1.

That is, when the blocking head 3 is forcibly inserted into the severely deformed pipe 1, the pipe 1 itself may be broken, and the pipe 1 deformed by the insertion roller 31 being forcibly inserted. Accident is often caused by the insertion of the blocking head (3) is immovably fixed, this problem occurs more and more toward the larger pipe diameter of more than 800mm, 1500mm to 2000mm In such a large tube, such problems are necessarily caused.

The present invention was devised to solve the above problems, and the blocking head of the folding type shutoff device inserted to block the pipe deformed to be lowered due to the earth pressure is inserted into the pipe having the lowered height so that it cannot move. The pressure of the insertion roller can be adjusted in advance so that smooth insertion and pulling of the blocking head can be performed, and the insertion roller is used to pull the blocking head according to the pipe state while the cutting head is inserted into the pipe so that the cutting head is cut. An object of the present invention is to provide a blocking method using a folding type blocking device that can adjust the pressure of the.

Other objects of the present invention may be understood through the features of the present invention, more clearly understood through the embodiments of the present invention, and may be realized by means and combinations indicated in the claims.

The present invention proposes a means for solving the following problems in order to achieve the problem to be solved by the present invention as described above.

In the present invention, the SL method using a folding type shutoff device having a pressure control function is a housing coupled to a gate valve and having a blocking head located therein and having a branch for bypass, installed vertically on the housing and moving the blocking head up and down. It consists of a hydraulic cylinder, a transfer unit coupled to the drive shaft of the hydraulic cylinder and the transfer head coupled to the transfer unit to shut off the fluid while entering and exiting the pipe by the hydraulic cylinder, the blocking head is coupled to the transfer unit to be able to rotate up and down Fixed connecting plate which is rotatably coupled up and down to two connecting shafts of the same length, which is rotated in parallelogram shape, and is located on left and right sides of the fixed connecting plate, and is connected to each link coupled to the left and right sides of the transfer part. Connection plate portion made; A disk-shaped rubber packing part covering the entirety of the connection plate part and in close contact with the inner wall of the pipe to serve as an order; And a fixed coupling plate coupled to the fixed connecting plate of the connecting plate part about the rubber packing part, and an insertion roller coupled to the insertion roller for the transfer of the blocking head to the upper end and the lower end thereof, and a rotating coupling plate coupled to the rotary connecting plate. Each insert roller coupled to the upper end and the lower end of the fixed coupling plate comprises a fixed guide portion coupled to the fixed coupling plate; A roller unit including a roller contacting the inner diameter of the pipe and fastened to the fixed guide part to move along the fixed guide part; And a spring positioned between the fixed guide part and the roller part to provide pressure to the roller part such that a force acts on the roller part toward a pipe side, wherein the spring between the fixed guide part and the roller part is positioned. A pressure adjusting screw for adjusting a pressure of the spring by adjusting a length of a space to insert the blocking head of the folding type shutoff device having a pressure control function into a pipe through which the fluid flows to block the fluid; Blocking step; Pipe cutting step of cutting the pipe flow stops the fluid through the fluid blocking step; A spring pressure adjustment step of relatively weakening the pressure of the spring by rotating the pressure adjustment screw of the blocking head exposed through the pipe cutting step; A pipe work step of performing a pipe work on the cut pipe after weakening the spring pressure of the blocking head through the spring pressure adjusting step; A shut-off head traction step of pulling the shut-off head in the pipe after the pipe work is completed through the pipe work step; And an equipment dismantling step of dismantling the folding type shutoff device having the pressure regulating function and the gate valve after the blocking head is returned through the blocking head traction step.

In addition, the pipe work of the SL method using the folding type shut-off device having a pressure control function of the present invention is characterized in that the water valve installation piping work for installing the water valve.

In addition, the pipe work of the SL method using the folding type blocking device having a pressure control function of the present invention is a relocation pipe connection pipe work for connecting the relocated pipe according to the relocation of the pipe;

In addition, the pipe work of the SL method using the folding type blocking device having a pressure control function of the present invention is a branch pipe connection pipe work for connecting the branch pipe according to the branch of the pipe;

The SL method using the folding type blocking device having a pressure control function of the present invention has the effect of solving the problem that the blocking head is fitted to the pipe in the process of blocking the deformed pipe through the technical features as described above.

In addition, the present invention has an effect that does not cause a problem that the pipe is broken by the insertion roller in the process of forcibly inserting the blocking head into the severely deformed pipe using the folding type blocking device having a pressure control function.

In addition, the SL method using the folding type blocking device having a pressure control function of the present invention has the effect of adjusting the pressure of the insertion roller even after inserting the blocking head in the pipe.

Other effects of the present invention may be understood through the features of the present invention, more clearly understood through the embodiments of the present invention, and may be exerted by means and combinations indicated in the claims.

1 is a view for explaining the cause of deformation in the underground pipe,
2 is a view for explaining a problem when the fluid blocking using the blocking head of the conventional folding type blocking device,
Figure 3 is a view for explaining the procedure of the SL method using the folding type blocking device having a pressure control function of the present invention,
Figure 4 is a view showing the overall appearance of a folding type block device having a pressure control function applied to the present invention SL method,
5 is a view showing a blocking head of a folding type shutoff device having a pressure control function applied to the SL method of the present invention,
Figure 6 is a view for explaining in detail through the embodiment the blocking head of the folding type blocking device having a pressure control function applied to the SL method of the present invention,
Figure 7 is a view for explaining in detail through the embodiment according to the insertion roller of the folding type blocking device having a pressure control function applied to the SL method of the present invention,
8 is a view for explaining a pressure adjusting screw of the folding type shut-off device having a pressure control function applied to the SL method of the present invention.

DETAILED DESCRIPTION OF THE INVENTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It is to be understood that the various embodiments of the present invention are different from one another but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention with respect to one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

Hereinafter, the cut-off water blocking method for cutting the cut-off water using a folding type shut-off device having a pressure regulating function is referred to as a safety line-stopping method.

SL method using the folding type blocking device having a pressure control function of the present invention is shown in Figure 3 for explaining the sequence of the SL method using the folding type blocking device having a pressure control function of the present invention, Fluid blocking step (S10), pipe cutting step (S20), spring pressure adjustment step (S30), pipe work step (S40), blocking head traction step (S50) and equipment removal step (S60) is made.

The fluid blocking step (S10), as shown in Figure 2, to install a flanged end pipe and a gate valve at any point of the pipe to block the fluid at any point of the pipe flowing fluid using a folding block device Afterwards, after drilling the pipe using a perforator, insert the blocking head of the folding type shut-off device into the pipe through the hole formed in the pipe using the perforator, and the folded blocking head is inserted into the pipe. As the head develops, it closes the pipe, thereby blocking the fluid flow inside the pipe.

At this time, the folding block device used in the fluid blocking step (S10) has a structure as shown in Figure 4 showing the overall appearance of the folding block device having a pressure control function applied to the SL method of the present invention. In particular, the blocking head, which is a key component of the folding type blocking device, has the characteristics as shown in FIG. 5 showing the blocking head of the folding type blocking device having a pressure regulating function applied to the SL method of the present invention. .

As shown in FIG. 4, the folding type shutoff device 10 according to the present invention has a housing 110, a hydraulic cylinder 120, a transfer unit 130, and a blocking head 140 similarly to a configuration of a general fluid shutoff device. Is made of.

Among them, the housing 110, the hydraulic cylinder 120 and the transfer unit 130 is not limited to the configuration having any particular form and function in the same configuration as the configuration forming a conventional fluid shutoff device.

In brief, the housing 110 is made of a steel material, as shown in Figure 4, the bottom is formed with a flange for engaging with the gate valve is seated on the gate valve and fastening means such as bolts and nuts Through and coupled to the gate valve, the interior is a space enough to accommodate the transfer unit 130 as shown in Figure 4 and the folding head 140 in the folded state shown in Figure 5 (a) And a branching portion 111 for bypass.

The hydraulic cylinder 120 is installed perpendicular to the housing 110, as shown in Figure 4, the transfer unit 130 is coupled to one end of the shaft 121 of the hydraulic cylinder (120).

Therefore, the transfer part 130 is coupled to the shaft 121 of the hydraulic cylinder 120 moving up and down inside the housing 110, so that the transfer part 130 moves up and down by the hydraulic cylinder 120. The blocking head 140 coupled to the transfer unit 130 also moves up and down together.

As shown in FIG. 5, the transfer part 130 is a means for connecting the blocking head 140 and the shaft 121 of the hydraulic cylinder 120 when the blocking head 140 is inserted into the pipe 1. It may have a variety of forms and structures to be unfolded in, but is not limited to any particular form and structure, but in the form as shown in Figures 4 and 5 above connecting the shaft 121 of the hydraulic cylinder 120 The portion has a cylindrical shape to allow fluid to flow through the transfer part 130, but forms a coupling part 131 that can be coupled to the shaft 121 at the center.

In addition, as shown in FIGS. 4 and 5, the transfer part 130 has a structure capable of being connected to the blocking head 140 and being supported at the same time, and having a length of reaching the bottom of the pipe 1. 132).

As described above, the transfer part 130 is coupled to the shaft 121 of the hydraulic cylinder 120 through the coupling part 131, and is connected to the connecting shaft 133 and the link 134 through the folding blocking head connection part 132. It is made in combination with the blocking head 140.

When the blocking head 140 is inserted into the pipe 1, the blocking head 140 is inserted into a folded state as shown in FIG. 5A, and is unfolded in a disc shape when the insertion is completed to close the pipe 1 to close the fluid. Folding (folding) and unfolding (deployment) of the blocking head 140 as a means for blocking the is made according to the change in the relative position value of the transfer unit 130 and the blocking head 140.

Such a blocking head 140 is shown in the drawings for explaining in detail the blocking head of the folding type blocking device having a pressure control function applied to the SL method of the present invention, the transfer unit 130 as shown in FIG. Fixed connecting plate 141-1 and the fixed connecting plate 141-1 rotatably coupled in a parallelogram shape by being coupled up and down to two connecting shafts 133 of the same length which are rotatably coupled up and down). Located on the left and right side of the connecting plate 141 and the connecting plate 141 made of a rotary connecting plate 141-2 connected to each link 134 coupled to the left and right sides of the transfer unit 130, and surrounds the whole, In close contact with the inner wall of the pipe and the rubber packing portion 142 of the disk-shaped and the rubber packing portion 142 is connected to the fixed connecting plate 141-1 of the connecting plate 141 around the center and the upper end and Insert roller for transporting the blocking head at the bottom It includes a coupling plate portion 143 consisting of a fixed coupling plate 143-1 to which the 150 is coupled and a rotation coupling plate 143-2 to which the rotary connection plate 141-2 is coupled.

Although not specifically illustrated in FIG. 6, the connection plate portion 141 and the coupling plate portion 143 are coupled to the rubber packing portion 142, and the coupling is performed by coupling means such as bolts and nuts. Preferably, but not limited thereto, various fastening means capable of fastening the coupling plate 141 and the coupling plate 143 to be integral with the rubber packing 142 may be used.

In addition, the connecting plate portion 141 and the coupling plate portion 143 is rotated by the rubber packing portion 142 without the coupling state such as the hinge coupling all the side portion to rotate, or the connecting plate portion 141 or the coupling plate portion ( 143) any one configuration may be combined to enable rotation, such as hinge coupling.

In addition, the insertion roller 150 located on the upper and lower portions of the coupling plate 143 is the size of the rounded state into the pipe is reduced in the vertical distance by the pipe is pressed due to the smooth movement and the earth pressure in the pipe of the blocking head 140. It is a means for enabling the insertion of the blocking head 140 having a pressed state at the time of insertion while pushing up the pipe.

The insertion roller 150 is coupled to the plate 143 so that excessive pressure is not applied to the pipe when the blocking head 140 is inserted into the deformed pipe while being inserted while correcting the deformed pipe while pushing up and down the pipe. Insertion roller 150 located at the top and bottom of the can adjust the vertical distance.

As such, the insertion roller 150 according to the present invention that can control the pressure is illustrated for explaining in detail through the embodiment according to the insertion roller of the folding type blocking device having a pressure adjustment function applied to the SL method of the present invention. As shown in the figure, the fixing guide 151, the roller portion 152 having a roller 152-1, and a spring 153, and comprises a pressure adjusting screw 154.

The fixing guide 151 is a means for coupling the roller unit 152 to the fixed coupling plate 143-1 so as to be movable as shown in FIGS. 6 and 7. The fixed guide 151 is fastened to the fixed guide 151 in a movable structure, and the fixed guide 151 to which the roller unit 152 is coupled is welded to the fixed coupling plate 143-1, or coupled through a fastening means such as a bolt. To combine.

On the other hand, the roller portion 152 is fastened to the fixed guide 151 to allow a predetermined movement includes a roller (152-1) in contact with the inner diameter of the pipe (1) is fastened to the fixed guide 151 It moves along the fixing guide 151.

6 to 7, the spring 153 is positioned between the fixing guide 151 and the roller 152 so that the roller 152 faces the pipe 1 side. Pressure is applied to the roller portion 152 so that a force is applied.

That is, the roller portion 152 fastened to the fixed guide 151 is forced to the pipe 1 side by a restoring force acting on the spring 153 inserted and compressed between the fixed guide 151 and the roller portion 152. To provide.

Therefore, it is possible to prevent the excessive force from acting so as to break the pipe 1 by the insertion roller 150 during the insertion of the blocking head 140 into the pipe 1.

That is, when an excessive force exceeding the restoring force of the spring 153 is applied, the roller unit 152 squeezes the spring 153 and prevents the force exceeding the restoring force from acting on the pipe 1. do.

In addition, the pressure adjusting screw 154 is fastened to the fixed guide 151 is added to the Figure for explaining the pressure adjusting screw of the folding type shutoff device having a pressure control function applied to the SL method of the present invention. As described above, the pressure of the spring, that is, the restoring force of the spring 153 in the depressed state is adjusted by adjusting the length of the space in which the spring 153 between the fixing guide 151 and the roller part 152 is located. As a means for doing this, in the state as shown in FIG. 8 (a) by rotating the pressure adjusting screw 154 in the form of a bolt to advance the pressure adjusting screw 154 relative position on the fixed guide 151 As shown in FIG. 8B, the length of the space in which the spring 153 is located is reduced, and the spring 153 is further compressed, thereby increasing the restoring force.

Therefore, the force acting on the pipe 1 by adjusting the restoring force of the spring 153 using the pressure adjusting screw 154 according to the state of the pipe 1 before inserting the blocking head 140.

The pipe cutting step (S20) is a step of cutting the pipe in a state in which the flow of fluid in the pipe is stopped through the fluid blocking step (S10) as shown in FIG. 1 for the pipe work (1) When cutting the part of the blocking head 140 is inserted insertion roller 150 is exposed.

That is, the blocking head 140 is inserted into the pipe 1 to block the fluid so that the surface on which the insertion roller 150 is installed is exposed because the pipe 1 is cut.

The spring pressure adjustment step (S30) is a step of adjusting the pressure adjusting screw 154 of the insertion roller 150 exposed through the pipe cutting step (S20) in the state as shown in FIG. The state as shown in (a) of FIG.

That is, by loosening the pressure adjusting screw 154 in the state as shown in FIG. 8 (b) and increasing the length of the space in which the spring 153 is inserted as shown in FIG. The force acting on 1) becomes weak, and in the future, the towing of the blocking head 140 may be smoothly towed.

On the other hand, the blocking head 140 in the state where the water pressure is acting does not affect the blocking state of the blocking head 140 even if the force acting by the spring 153 of the insertion roller 150.

Therefore, the insertion space of the spring 153 is increased through the pressure adjusting screw 154 as described above, and the force acting in the vertical direction of the pipe by the insertion roller 150 is relatively reduced compared to the initial stage, thereby facilitating the blocking head 140. Can be towed safely.

The pipe work step (S40) is a predetermined for the pipe corresponding to the purpose of applying the SL method according to the present invention after reducing the pressure of the spring through the pressure adjusting screw 154 in the spring pressure adjustment step (S30). Spring pressure adjustment step (S30) to relatively weaken the pressure of the spring 153 by rotating the pressure adjusting screw 154 of the blocking head 140 exposed through the pipe cutting step (S20) to the step of the operation is made. After weakening the pressure of the spring 153 of the blocking head 140 through the () is the same feature that the piping work for the cut pipe (1) is made.

On the other hand, the pipe work of the present invention SL method can be a water valve installation pipe work for installing a water valve, such a water valve installation piping work is to install a new valve or to replace the existing valve with a new valve. It can be plumbing.

In addition, the pipe work of the present invention the SL method may be a moving pipe connection pipe work for connecting the pipes moved according to the relocation of the pipe, which is to install a new pipe or to replace or move the existing installed pipe to a new one It can be plumbing.

In addition, the pipe work of the present invention SL method may be a branch pipe connection piping work for connecting the branch pipe according to the branch of the pipe.

The blocking head traction step S50 is a step of moving the blocking head 140 into the housing 110 in the pipe 1 after the pipe work is completed through the pipe work step S40. By pulling the shaft 121 by driving the hydraulic cylinder 120 to pull the blocking head 140 that is deployed in the blocking head 140 is transported and received inside the housing 110 while being folded.

The equipment dismantling step S60 dismantles the folding type shutoff device 10 and the gate valve having a pressure control function installed in the pipe 1 after the blocking head is returned through the blocking head traction step S50.

That is, in the equipment removal step (S60), the equipment used to apply the present invention the SL method is removed.

In the above, the present invention has been described based on the preferred embodiments, but the technical idea of the present invention is not limited thereto, and modifications or changes can be made within the scope of the claims. It will be apparent to those skilled in the art and such modifications and variations are intended to fall within the scope of the appended claims.

1: Piping
2: conventional folding block device
3: conventional blocking head
31: conventional insert roller
10: folding type blocking device according to the present invention
4: fluid shutoff device
110: housing
111: bypass branch
120: hydraulic cylinder
121: shaft
130: transfer unit
131: coupling part
132: folding blocking head connection
133: connecting shaft
134: link
140: blocking head
141: connecting plate
141-1: Fixed connecting plate
141-2: Rotary connection plate
142: rubber packing part
143: coupling plate
143-1: Fixed Bonding Plate
143-2: Rotating Plate
150: insertion roller
151: Fixed Guide
152: roller portion
152-1: Roller
153: spring
154: pressure adjusting screw

Claims (4)

A housing coupled with the gate valve and having a blocking head disposed therein, and having a branch for bypass, a hydraulic cylinder installed vertically on the housing and moving the blocking head up and down, a transfer unit coupled to a drive shaft of the hydraulic cylinder, and coupled to the transfer unit. And a blocking head which blocks the fluid while entering and exiting the pipe by the hydraulic cylinder, and the blocking head is pivotally coupled to two connecting shafts of the same length coupled to be rotatable up and down in the transfer part to be parallelogram type. A connection plate part formed of a fixed connection plate rotating in a form and a rotation connection plate positioned at left and right sides of the fixed connection plate and connected to each link coupled to the left and right sides of the transfer unit; A disk-shaped rubber packing part covering the entirety of the connection plate part and in close contact with the inner wall of the pipe to serve as an order; And a fixed coupling plate coupled to the fixed connecting plate of the connecting plate part about the rubber packing part, and an insertion roller coupled to an insertion roller for transferring the blocking head to the upper end and the lower end, and a rotating coupling plate coupled to the rotary connecting plate. Each insert roller coupled to the upper end and the lower end of the fixed coupling plate comprises a fixed guide portion coupled to the fixed coupling plate; A roller unit including a roller contacting the inner diameter of the pipe and fastened to the fixed guide part to move along the fixed guide part; And a spring positioned between the fixed guide part and the roller part to provide a pressure to the roller part such that a force acts toward the pipe side, wherein the spring between the fixed guide part and the roller part is positioned. A pressure adjusting screw for adjusting a pressure of the spring by adjusting a length of a space to insert the blocking head of the folding type shutoff device having a pressure control function into a pipe through which the fluid flows to block the fluid; Blocking step;
Pipe cutting step of cutting the pipe flow stops the fluid through the fluid blocking step;
A spring pressure adjustment step of relatively weakening the pressure of the spring by rotating the pressure adjustment screw of the blocking head exposed through the pipe cutting step;
A pipe work step of performing a pipe work on the cut pipe after weakening the spring pressure of the blocking head through the spring pressure adjusting step;
A shut-off head traction step of pulling the shut-off head in the pipe after the pipe work is completed through the pipe work step; And
Folding type disconnecting device having a pressure control function characterized in that it comprises a; step of removing the folding-type shut-off device having the pressure control function and the equipment to remove the gate valve after the blocking head is returned through the blocking head towing step SL method using. The method of claim 1, wherein the piping operation
SLS method using a folding type shut-off device having a pressure control function, characterized in that the water supply valve installation piping work for installing the water valve. The method of claim 1, wherein the piping operation
SLS method using a folding type shut-off device having a pressure control function characterized in that the piping work connecting pipes to connect the moved pipes according to the relocation of the pipe. The method of claim 1, wherein the piping operation
It is a branch pipe connection piping work for connecting the branch pipe according to the branch of the pipe; SL method using a folding type block device having a pressure control function.

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