JP2014181790A - High-pressure fluid piping valve or branch line installing method and valve installing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-pressure fluid piping valve installing device or a branch line installing method that can easily installing a valve or a branch piping to the high-pressure fluid piping.SOLUTION: A high-pressure fluid piping valve or a branch piping installing method of this invention is carried out such that a pressure of high-pressure fluid flowing in the high-pressure fluid piping is reduced, a temporary stop valve for closing a flow passage of the high-pressure fluid piping is installed at an upstream side of an installing work planned position where the valve in the middle of the high-pressure fluid piping valve or the branch piping is installed, a valve body of the temporary stop valve is moved to close the flow passage of the high-pressure fluid piping, the valve or the branch piping is installed at the installing work planned position, the valve body of the temporary stop valve is moved and after the flow passage of the high-pressure fluid piping is released, the location where the temporary stop valve is attached is reinforced with a proof pressure reinforcing member and the pressure of fluid is returned back to the original pressure.

Description

  The present invention relates to a valve for high-pressure fluid piping or a mounting method and a valve mounting device for a branch pipe.

  Some factories use fluids such as high-pressure cooling water and high-pressure / high-temperature heat transfer oil, and some facilities must be completely shut down when the fluid supply is stopped. However, when the equipment is completely shut down, the melt may solidify in the equipment or the equipment may crack due to thermal expansion. When such a failure occurs, it cannot be restored, so replacement may be indispensable.

  In such equipment, for example, even if the equipment operation rate is lowered or the equipment temperature is maintained for restoration, the equipment needs to be operated for restoration. For example, in a pipe for flowing a high-pressure fluid in such a facility (hereinafter referred to as a high-pressure fluid pipe), it is important not to stop the flow of the fluid even if the flow rate is reduced by reducing the pressure of the fluid. .

  And it is connected to equipment that can completely shut down the flow of fluid, or equipment that can temporarily stop the flow of fluid, branched from the header of the piping for high-pressure fluid connected to the equipment as described above. In cases where you want to install a new high-pressure valve for flow control in the middle of a high-pressure fluid pipe, or a case where you want to install a branch pipe or valve for the purpose of supplying fluid to a new facility (another facility) such as an expansion Because the fluid flowing in the high-pressure fluid piping connected to the equipment that cannot be shut down cannot be completely stopped, the high-pressure valve for adjusting the flow rate, stop valve, branch piping, branch without stopping the fluid It is necessary to use a method of installing valves, etc.

  Patent Document 1 discloses a valve mounting device used for realizing a continuous water construction method and a valve mounting method using the same. This apparatus includes a housing having a perforated cylinder portion (bonnet), an upper lid that can be attached to the housing, and a fluid valve that is inserted into the perforated cylinder portion (bonnet) of the housing.

Japanese Utility Model Publication No. 64-38365

  However, the technique disclosed in Patent Document 1 does not disclose any device for applying the apparatus and the construction method to the high-pressure fluid piping, and the technique disclosed in Patent Document 1 is used for the high-pressure fluid as it is. It cannot be used for piping.

  In general, the above-described high-pressure valve for flow control, branch piping, and valves can be used in a short period of time and at low cost because standard products can be used if the pipe diameter and fluid pressure are determined. In addition, when the valve mounting device is mounted on the high-pressure fluid pipe, the structure such as the casing of the valve mounting device can easily increase the pressure resistance by increasing the thickness of the material.

  However, the seal portion of the valve mounting device and the pipe for high-pressure fluid, the temporary water stop valve (temporary stop valve) provided in the valve mounting device, the sliding portion of the working valve, and the slide Regarding the seal portion and the like covering the periphery of the moving portion, detailed design of the material and structure must be performed in consideration of the pressure and properties of the fluid, for example, leakage. For this reason, when a high pressure valve, branch pipe, valve or other valve or pipe is mounted on the high pressure fluid pipe, it takes time to design and manufacture the valve mounting apparatus, and the valve mounting apparatus becomes expensive. There was a problem that it took a long time to start construction.

  The present invention has been made with respect to such problems, and is a high-pressure fluid piping valve in which a high-pressure fluid piping, a valve such as a high-pressure valve, a branch piping or a valve, or a piping can be easily mounted. An object is to provide a mounting method and a valve mounting device.

In order to achieve the above object, the present invention has the following features.
[1] The pressure of the high-pressure fluid flowing in the high-pressure fluid piping is reduced,
A temporary stop valve that closes the flow path of the high-pressure fluid pipe is installed upstream of the planned construction site where a valve or branch pipe in the middle of the high-pressure fluid pipe is planned to be installed. After moving and closing the flow path of the high-pressure fluid piping,
Install the valve or the branch pipe at the planned installation work position,
And after moving the valve body of the temporary stop valve to open the flow path of the high-pressure fluid piping,
Reinforce the place where the temporary stop valve is attached with a pressure-resistant reinforcing member,
A method for mounting a valve or branch pipe of a high-pressure fluid pipe, wherein the pressure of the fluid is returned to the original pressure.
[2] The work for reinforcing the location where the temporary stop valve is attached covers the outer periphery of the location where the temporary stop valve is attached with a pressure-resistant reinforcing member. Or installation method of branch piping.
[3] A valve mounting device for a high-pressure fluid pipe used in the method for mounting a valve or branch pipe for a high-pressure fluid pipe according to [1] or [2],
A housing attached to the high-pressure fluid piping;
A perforator installed in the housing and drilling a hole in the high-pressure fluid pipe;
A temporary stop valve that is inserted through a hole opened by the perforator and closes the flow path of the high-pressure fluid pipe;
A valve mounting device for high-pressure fluid piping having a pressure-resistant reinforcing member that reinforces a place where the temporary stop valve is installed after the temporary stop valve is removed.

  In the present invention, a valve or a branch pipe or the like can be attached to a high-pressure fluid pipe more easily than in the past.

It is a figure which shows the valve mounting apparatus of the piping for high pressure fluid which concerns on embodiment of this invention. It is a figure which shows the operation | movement procedure of the mounting method of the valve of high pressure fluid piping or branch piping which concerns on embodiment of this invention. It is a figure which shows the work procedure of the mounting method of the valve of the high pressure fluid piping which concerns on embodiment of this invention, or a branch pipe, and is a figure which shows the work procedure at the time after FIG. It is a figure which shows the work procedure of the mounting method of the valve of high pressure fluid piping which concerns on embodiment of this invention, or branch piping, and is a figure which shows the work procedure at the time after FIG. It is a figure which shows the work procedure of the mounting method of the valve | bulb of high pressure fluid piping or branch piping concerning embodiment of this invention, and is a figure which shows the work procedure at the time after FIG. It is a figure which shows the work procedure of the mounting method of the valve of the high pressure fluid piping which concerns on embodiment of this invention, or a branch pipe, and is a figure which shows the work procedure at the time after FIG. It is a figure which shows the work procedure of the mounting method of the valve of high pressure fluid piping or branch piping concerning embodiment of this invention, and is a figure which shows the work procedure at the time after FIG. It is a figure which shows the work procedure of the mounting method of the valve | bulb of high pressure fluid piping which concerns on embodiment of this invention, or branch piping, and is a figure which shows the work procedure at the time after FIG. It is a figure which shows the work procedure of the mounting method of the valve of high pressure fluid piping which concerns on embodiment of this invention, or branch piping, and is a figure which shows the work procedure at the time after FIG. It is a figure which shows the operation | movement procedure of the mounting method of the valve of high pressure fluid piping or branch piping concerning embodiment of this invention, and is a figure which shows the operation | movement procedure at the time after FIG. It is a figure which shows the operation | movement procedure of the mounting method of the valve of high pressure fluid piping or branch piping which concerns on embodiment of this invention, and is a figure which shows the operation | work procedure at the time after FIG. It is a figure which shows the work procedure of the mounting method of the valve of high pressure fluid piping which concerns on embodiment of this invention, or branch piping, and is a figure which shows the work procedure at the time after FIG. It is a figure which shows the modification of the mounting method of the valve or branch piping of the piping for high pressure fluid which concerns on embodiment of this invention.

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

  FIG. 1 is a diagram showing a configuration of a valve mounting device for high-pressure fluid piping according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a high-pressure fluid pipe in which a valve or a branch pipe is installed. A high-pressure fluid 2 flows through the high-pressure fluid pipe 1. The fluid 2 is liquid or gas, and is, for example, water, heat transfer oils, or gases. Moreover, 3 has shown the installation construction planned position which installs a valve or branch piping.

  The valve mounting device 4 according to the present invention is installed upstream from the planned installation position 3 of the high-pressure fluid piping 1. The valve mounting device 4 has a cylindrical bonnet 44 and a housing 45. The bonnet 44 includes a temporary stop valve 42, a fixed part 441, a movable part 442, and a handle 443.

  The casing 45 is formed in a tubular shape and is attached to the outer periphery of the high-pressure fluid pipe 1. A hole 45a is formed in a part of the peripheral surface of the housing 45, and a cutter 51 and a temporary stop valve 42 of the punching machine 5 described later are inserted into the hole 45a.

  A work valve 43 having a work valve body 431 is provided on the upper portion of the housing 45. The work valve 43 can block the hole 45a of the housing 45 by moving the work valve body 431. The working valve 43 functions so that the fluid 2 does not leak to the outside after being pierced in the high-pressure fluid piping 1 in a state where the valve body 431 is closed.

  The bonnet 44 can be removed from the work valve 43 (fixed portion 441, movable portion 442, handle 443). A piercing machine 5 to be described later can be attached to the bonnet 44 with the upper portions (the fixed portion 441, the movable portion 442, and the handle 443) removed.

  Further, the valve mounting device 4 includes a pressure-resistant reinforcing member 46 (described later) for reinforcing the place where the temporary stop valve 42 is installed.

  2-12 is a figure which shows the operation | movement procedure of the high pressure fluid which concerns on embodiment of this invention. First, the pressure of the fluid 2 is reduced. For example, the pressure of the high-pressure fluid 2 of about 1 to 5 MPa is reduced to about 0.3 MPa.

  Next, as shown in FIG. 3, the valve mounting device 4 is mounted upstream of the planned installation work position 3 while the fluid 2 is decompressed. Specifically, the casing 45 of the valve mounting device 4 is mounted on the outer periphery of the high-pressure fluid pipe 1. At this time, the temporary stop valve 42, the fixed portion 441, the movable portion 442, and the handle 443 shown in FIG. 1 are removed from the valve mounting device 4, and the punching machine 5 (including the cutter 51) is used instead. Is installed.

  Next, as shown in FIG. 4, a hole 1 a is opened in the high-pressure fluid pipe 1. Specifically, with the valve body 431 of the working valve 43 opened, the cutter 51 is inserted into the high pressure fluid pipe 1 side through the hole 45a of the housing 45, and drilling is started. FIG. 4 shows a state where the drilling has been completed. When the cutter 51 reaches the flow path of the high-pressure fluid pipe 1 during drilling, a plurality of holes through which the fluid 2 passes are formed so as not to hinder the flow of the fluid 2 (so that the flow rate does not decrease). .

  After the drilling is completed, as shown in FIG. 5, the cutter 51 is pulled up, a cut piece (not shown) is collected, and the valve body 431 of the working valve 43 is closed. The center drill (not shown) provided at the tip of the cutter 51 is provided with a special drop prevention jig, and the cut piece falls into the high-pressure fluid pipe 1 even after the drilling is finished. It is configured so that there is nothing.

  Thereafter, as shown in FIG. 6, the punching machine 5 is removed from the housing 45, and the bonnet 44 is installed on the upper portion of the housing 45 together with the temporary stop valve 42, the movable portion 442 and the handle 443. That is, the valve mounting device 4 is in the state shown in FIG.

  Next, as shown in FIG. 7, the valve body 431 of the working valve 43 is opened. Then, as shown in FIG. 8, the movable portion 442 is moved from the outer periphery of the high-pressure fluid pipe 1 toward the flow path, and the valve body 421 of the temporary stop valve 42 is moved to a predetermined closing position in the high-pressure fluid pipe 1. Until the screw is tightened. The handle 443 is operated to close the flow path of the high-pressure fluid pipe 1 by the valve body 421. In the state in which the flow path is closed by the valve body 421, the pressure upstream and downstream of the valve body 421 remains in a state where the pressure is reduced to about 0.3 MPa, and there is no violent fluid ejection, so that installation work can be performed safely. It is.

  Next, as shown in FIG. 9, a high pressure valve for high pressure fluid or a branch pipe / valve or the like (here, referred to as a high pressure valve 6) is installed at the planned installation work position 3 while the fluid 2 is decompressed. Install. Thereby, the flow path of the fluid 2 can be adjusted by closing the flow path of the high-pressure fluid pipe 1 with the valve body 61 of the high-pressure valve 6. In addition to the high-pressure valve 6, a branch pipe / valve for high-pressure fluid may be installed in the installation work planned position 3.

  Then, as shown in FIG. 10, with the high pressure valve 6 installed, the valve body 421 of the temporary stop valve 42 is moved upward to open the flow path of the high pressure fluid pipe 1. Thereafter, as shown in FIG. 11, the hole 45 a of the housing 45 is closed by the working valve body 431. And the bonnet 44 grade | etc., Is removed from the housing | casing 45 in the state which closed the hole 45a of the housing | casing 45 with the valve body 431 for work.

  Finally, as shown in FIG. 12, a pressure-proof reinforcing part is provided at a position where the valve body 421 of the temporary stop valve 42 is installed. That is, the pressure-resistant reinforcing member 46 reinforces the portion where the pressure resistance is lowered by forming the hole 1 a into which the cutter 51 and the temporary stop valve 42 are inserted. Specifically, the entire outer periphery of the valve mounting device 4 from which the bonnet 44 has been removed is covered with a cylindrical pressure-resistant reinforcing member 46. Moreover, the outer peripheral surface of the high-pressure fluid pipe 1 and the pressure-resistant reinforcing member 46 are welded with a welding material 461 as necessary. Thereby, the outer periphery of the place where the temporary stop valve 42 is installed is sealed and reinforced by the pressure-resistant reinforcing member 46.

  Thereafter, the pressure of the fluid 2 that has been reduced is returned to the original pressure. Thereby, the high-pressure valve 6 can be mounted on the high-pressure fluid pipe 1.

  In the valve mounting method for the high-pressure fluid pipe 1 configured as described above, the pressure of the fluid 2 is reduced before the valve mounting device 4 is provided. Therefore, the conventional valve in which the pressure of the fluid 2 does not need to be considered and the pressure resistance is not considered for the sliding portion of the valve of the valve mounting device 4 and the seal portion that covers the periphery of the sliding portion as in the past. The main part of the mounting device can be used. Thereby, a valve such as a high-pressure valve or a branch pipe or a pipe can be installed in the high-pressure fluid pipe 1 safely in a short time.

  Further, in the valve mounting device 4 and the valve mounting method for the high-pressure fluid pipe 1 according to the present embodiment, the outer periphery of the valve mounting device 4 after the bonnet 44 is removed is covered with the pressure-resistant reinforcing member 46. Thereby, a hole is formed by the valve mounting device 4 and a portion where the pressure resistance is low can be reinforced, and the pressure resistance of the high-pressure fluid pipe 1 can be secured.

  Note that the present invention is not limited to the above-described embodiment, and various design changes can be made by those skilled in the art. For example, the design / production to increase the pressure resistance of the working valve 43, the working valve body 431, and the housing 45 excluding the sliding part / seal part, etc. is made with a high pressure resistant structure (pressure resistant structural member). It may be difficult to increase the pressure, and the sliding portion and the seal portion having low pressure resistance may be covered with a pressure resistant reinforcing member.

  FIG. 13 is a diagram showing a modification of the present invention. FIG. 13 corresponds to the state of FIG. In the modification, the outer periphery of the valve mounting device 4 is welded by the welding member 461 without covering the outer periphery of the valve mounting device 4 with the pressure-proof reinforcing member 46. In this modification, the casing 45 and the working valve body 431 are thickened so that the valve mounting device 4 has a sufficient pressure resistance. As a manufacturing method of the modified example, for example, when the bonnet 44 is removed and the working valve 43 is closed (the state shown in FIG. 11), the position of the sliding portion / seal portion is welded by the welding member 461. Good.

DESCRIPTION OF SYMBOLS 1 Piping for high pressure fluid 2 Fluid 3 Installation construction planned position 4 Valve mounting device 42 Temporary stop valve 421 Valve body 43 Working valve 431 Working valve body 44 Bonnet 441 Fixed part 442 Movable part 443 Handle 45 Housing 46 Pressure-resistant reinforcing member 461 Welding part 5 Punching machine 51 Cutter 6 High pressure valve

Claims (3)

Reduce the pressure of the high-pressure fluid flowing through the high-pressure fluid piping,
A temporary stop valve that closes the flow path of the high-pressure fluid pipe is installed upstream of the planned construction site where a valve or branch pipe in the middle of the high-pressure fluid pipe is planned to be installed. After moving and closing the flow path of the high-pressure fluid piping,
Install the valve or the branch pipe at the planned installation work position,
And after moving the valve body of the temporary stop valve to open the flow path of the high-pressure fluid piping,
Reinforce the place where the temporary stop valve is attached with a pressure-resistant reinforcing member,
A method for mounting a valve or branch pipe of a high-pressure fluid pipe, wherein the pressure of the fluid is returned to the original pressure.   The valve or branch pipe for high-pressure fluid piping according to claim 1, wherein the work of reinforcing the location where the temporary stop valve is attached covers the outer periphery of the location where the temporary stop valve is attached with a pressure-resistant reinforcing member. How to wear. A valve mounting device for high-pressure fluid piping used in the method for mounting a valve or branch piping for a high-pressure fluid piping according to claim 1 or 2,
A housing attached to the high-pressure fluid piping;
A perforator installed in the housing and drilling a hole in the high-pressure fluid pipe;
A temporary stop valve that is inserted through a hole opened by the perforator and closes the flow path of the high-pressure fluid pipe;
A valve mounting device for high-pressure fluid piping having a pressure-resistant reinforcing member that reinforces a place where the temporary stop valve is installed after the temporary stop valve is removed.

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