JPS58207589A - Sealing method of leakage from gland packing and its device - Google Patents

Abstract

PURPOSE:To obtain a safe leakage stop by injecting a seal material through a copper tube wound and fixed around the gland bush of a gland packing of a valve, etc. CONSTITUTION:A gland bolt is loosened and a copper tube 10 is wound around a gland bush 4 between a valve body 1 and a gland presser foot 5. Next, tightening tools 12A, 12B are coupled around the copper tube 10, and tightening bolts 13A, 13B, and a gland bolt 6 are tightened to fix the copper tube 10. Then, a seal material injection port 11 is fitted to the base end 10b of the copper tube 10. Next, the seal material is injected into a gland packing 3 through the injection port 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for sealing leaks from a ground parapet.

Various types 1 (Industrial Plan 1) include high-temperature, heavy-duty piping lines, for example, steam piping lines at 100 to 400°C, which are lined vertically and horizontally.
There are many valves etc. that are sealed with gland seals.

By the way, conventionally, when a leak occurs from the ground buff 1, such as a valve installed in the piping line of such plans 1 to 1, which are continuously operated, from the viewpoint of safety and economy, the line corresponding to the branch line of the plant is removed. In this case, the operation of that part was stopped for repairs.

However, the grand 1 of valves etc. installed in the main piping line
~In the case of a leak from the seal, Plan 1 - We had to shut down the entire operation and repair it.

Even if it is damaged, the cost to carry out this repair and restart is often an enormous amount of money, so (]-7J
', = <In many cases, leakage was left until regular inspection.

In recent years, a method has been proposed and implemented to stop leaks in piping lines while the plant remains in operation.1. Sea urchin<7
-, ta. ! The next method is to place it in the place where it is leaking.゛λ
Synthesis of semi-porous bamboo using high internal pressure J, for example, a method of injecting a sealing material called Freseal C8 (face name) with an injection gun to seal the leak part and harden it. In response to leaks from the connecting flanges of piping lines, various methods have already been proposed for detecting leaks.

However, if there is a leak of high-temperature, high-pressure fluid, such as water vapor, from the gland packing, for example of a valve, conventionally, as shown in FIG. Well, I took an injection gun into this hole and injected sealing material to prevent leakage.However, with the valve installed in the high temperature and pressure piping line, when drilling the hole, In many cases, concerns about damage to the valve body and ignition during drilling pose problems from the standpoint of safety in plant operation, and there is still no appropriate leak prevention method or device for leaks from the gland packing. I felt tired.

The present invention provides a sealing material that can be used to prevent leakage from the gland packing of a piping line, such as a valve gland packing, without stopping plant operations and without drilling holes in the valve body. We provide a method and device that can prevent leaks by injecting it!
It was made for the purpose of

Therefore, according to the present invention, in a method for sealing leakage from a gland parapet of a valve, etc., the gland bolt is loosened and a gland bushing is inserted between a member provided with a packing such as a valve body and a gland retainer. Wrap a steel pipe around the outer periphery, then engage a pair of tightening tools on the outer periphery of the wrapped copper pipe, and tighten the tool around the outer periphery of the wrapped copper pipe with Pol 1-. At the same time, fix the copper pipe by tightening the gland bolt, then attach a sealant injection gun to the injection port attached to the proximal end of the steel pipe, and at a pressure higher than the internal pressure, pass the seal l through the steel pipe in Paragraph 4. : After injecting the sealant, block the injection port with Meclapol i-, loosen the gland bolt after a certain period of time, remove the bolt to tighten, and remove the tool and steel pipe to tighten. Next, tighten the gland bolt.

Further, according to the present invention, in order to carry out the above-described method, a steel pipe having a sealing material injection port attached to the proximal end and wound around the outer circumference of the gland bushing of the gland packing, and a steel pipe wound around the outer circumference of the gland bushing L are provided. A pair of clamping tools are used to engage the outer periphery of the steel pipe, a bolt is used to tighten the tightening tool to the outer periphery of the steel pipe wrapped around the outer periphery of the gland bushing, and a sealing material is attached to the injection port of the steel pipe. It is equipped with an injection gun and Mekurapol I~ for blocking the injection port.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 shows the entire structure of a valve sealed with a gland packing in which the present invention is implemented, 1 is a valve body, 2 is a valve shaft passing through the valve body, and 3 is a space between valve body 1 and valve shaft 2. The interposed gland, 4 is a gland pushbutt that comes into contact with the gland 3, 5 is a gland holder, and 6 is a gland bolt. By tightening the gland bolt 6 once, the gland 3 is attached to the valve body 1.
ζ is crimped onto the valve stem 2 to seal the portion where the valve stem 2 passes through the valve body 1. In addition, 7 is a bushing into which the bolt part cut in the corner of the valve stem 2 is screwed, and 8 (the bushing 7 is connected to the valve body 1).
The support 9 is a handle fixed to the tip of the valve shaft 2. By turning the handle 9, the valve shaft 2 moves up and down, opening and closing the valve. In addition, although the gland bushing 4 and the gland presser 5 are shown as separate members in the figure, they may be combined and covered with the gland.

If a leak occurs in such a valve installed in a piping line, the leak is stopped according to the embodiment of the present invention described below.

In FIGS. 2 and 3, 10 is a copper tube whose tip 10a is cut on both sides and is wound around the gland bushing 4 between the valve body 1 and the gland holder 5, and 11 is the base end 10b of the copper tube 10. The seals 12A and 12B are attached to the seal inlet, 12A and 12B are wrapped around [A pair of tightening tools 13A are used to engage the outer periphery of the steel pipe 10 and fix the steel pipe 10.
, 13B are a pair of bolts that tighten the tightening tools 12A and 12B around the outer periphery of the steel pipe 10.

If a leak occurs from the gland packing of the valve, loosen the gland bolt 6, place it between the valve body 1 and the gland retainer 5, and wrap the copper pipe 10 around the gland bushing 4. Next, the outer circumference of the steel pipe 10 is tightened using tools 12A and 12.
B and tighten it f, j (tighten the J bolts 13A, 13B and gland poles 1-6 to fix the steel pipe 10. Then, connect the sealing material injection port 11 to the base end 10b of the copper pipe 10.
Attach.

Next, the 11th person 11 takes a sealing material injection gun (not shown) and injects the sealing material into the gasket 3 at a pressure higher than the internal pressure. After injecting the sealant, a blind bolt is attached to the injection port 11 to close the injection port. By doing this, the sealing material will spread over the space created by the wear of the packing, making it possible to stop leaks from the gland.

After a certain period of time, you will be able to open and close the valve by turning the handle 9 in the same way as with a new gasket. Loosen and tighten the gland bolt 6, remove poles 1 to 13Δ and 13B, and use tool 12Δ to tighten the valve. , 12B and the copper tube 10 are removed, and the ground bolt 6 is tightened.

As explained above, according to the present invention, when a leak occurs in the gland seal of a valve, etc., the leakage can be stopped without stopping the plant operation, and the hole leading from the outside of the gland to the seal can be stopped. The sealing material can be injected in parallel by simply wrapping the steel pipe around the gland push-piece and tightening the steel pipe with tools and bolts without having to open the pipe. This allows for economical and safe repairs, avoiding the huge expense of restarting.
Becomes b.

Although the above description has been made regarding leakage from the gland packing of a valve, it goes without saying that the present invention is not limited to valves and can also be applied to leak prevention in other devices that use gland packing as a shaft sealing device. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view partially showing the entire structure of 49 equipped with a gland packing in which the present invention is implemented. Figures 2 and 3 show the same main parts, Figure 2 is a cross-sectional view taken along the line ■ in Figure 3, and Figure 3 is a plane 1...valve that is a view taken along the mfIltll + arrow in Figure 2. Body 2...Valve stem 3...Putskin
4...Grand button 5...Grand presser foot 6...Grand pole l-7...Button 8
... Bush support 9 ... Handle 10.
...Copper pipe 11...11th person 12...To tighten it with tool 13...tighten it with bolts Procedure amendment September 1981 "Japanese Patent Office Commissioner Kazuo Wakasugi Koku 1, Indication of the case Special Gansho 57-88861 No. 2,
Name of the invention Method and device for sealing leaks from ground packing 3, Relationship with the case of the person making the amendment Applicant address 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Name
(023) Ebara Corporation Representative Tsukeji Hatakeyama 4, Agent 105 Address 1-10-8-5 Nishi-Shinbashi, Minato-ku, Tokyo Date of amendment order Voluntary amendment 7 Contents of amendment (1) Drawing No. Figure 1 will be corrected as shown in the attached drawing. 8. List of attached documents

Claims (2)

[Claims] (1) In the method of sealing leaks from the gland bushing of a valve, etc., loosen the gland pole 1- and install the gland bushing (a copper Buddha on the outer periphery of the gland bushing between the attached member and the gland holder).・Wrap and then wrap 1) Engage a pair of tightening tools on the outer periphery of the wrapped copper pipe; At the same time, fix the steel pipe by tightening the gland pole [1], and then take the sealant injection gun to the injection port attached to L44B of the steel pipe. Inject the sealant into the seal through the copper pipe, and once the sealing material has been injected, cover the injection [] with memeclapol, and after passing the eaves for a certain period of time, loosen the gasin bolt and do not tighten it again.
Remove and tighten the No. 1 to 1) tools and copper screws, then tighten the gland bolt to check for leaks from the gland.
How to walk. (2) One person put the sealing material on the u end [1 is installed and 1 is put on the ground pusher] The copper pipe with valleys and grooves on the outer periphery is Grand 1! A pair of tightening tools that engage the outer periphery of the steel pipe wrapped around the outer periphery of the push-shi-1, and a pair of tightening tools that engage the outer periphery of the steel pipe wrapped around the outer periphery of the gland bolt-1. f=I I
A sealing material injection product that is characterized by consisting of a J-bolt, a seal injection gun that can be attached to a steel pipe by one person, and a blank bolt that closes the injection port.