JPS6367497A - Gas sealing plug - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Object of the Invention] The present invention relates to the creation of a gas seal plug, which is small and easy to handle even in relatively large diameter piping, and forms an accurate gas seal. It is an object of the present invention to provide an effective gas sealing stopper that is capable of sealing an inert gas, and further to appropriately lead out the gas inside the sealed pipe to the outside.

(Industrial field of use) Plugs for creating gas seals when constructing pipelines in oil refinery plants, gas transportation piping, etc.

(Prior art) In oil refinery plants, gas transportation piping, etc., welding work is essential when extending existing piping, installing branch pipes, or replacing pipes, and gas remains in these pipes. However, even in the piping of an oil refinery plant, for example, there is gas vaporized from residual oil in the pipes, and there is a great danger that these gases will ignite and explode during the welding process. Therefore, when carrying out construction work on such pipelines, it is necessary to seal them, and furthermore, when the gas pressure inside the sealed pipes becomes high, it is necessary to seal the sealed pipes. Although it is preferable to lead it out to the outside, no suitable sealing method has been found so far. That is, the method normally employed in the field for sealing in such cases is to block the inside of the pipe with clay.

(Problems to be Solved by the Invention) However, as mentioned above, it is not easy to seal the clay inside the pipe, and it is especially difficult to form an airtight seal, and the clay contains water and becomes plastic. Even if a perfect seal is formed, it will dry and shrink over time, and cracks and gaps will inevitably form, resulting in a loss of airtightness. Therefore, the above-mentioned method is to form a double sealing section with clay and fill in an inert gas between the sealing sections to prevent leakage of the internal gas. The operation is very complicated and requires a lot of effort, and there are disadvantages in that the inert gas must be constantly supplied during the work over a considerable period of time.

"Structure of the Invention" (Means for Solving the Problems) (1) An annular packing made of an elastic material is interposed between a pair of disc members each having a tapered part facing each other on the circumferential side. A tightening material is inserted into these seal sections, and the proximal end of the tightening material is engaged with the outer disc body of one of the seal sections, and the seal sections are arranged as a pair. A sleeve is interposed in the sealing part, and a tightening element is screwed into the thread at the tip of the tightening material protruding from the outer disk part body of the other seal part of the pair as described above, A gas seal plug characterized in that an inert gas inlet and outlet pipe is provided on one side of each seal portion. and (2) a pair of seal parts each having an annular packing made of an elastic material interposed between a pair of disc parts each having a tapered part facing each other on the circumferential side thereof are disposed as a pair. A tightening material is inserted into the seal portion, and the proximal end of the if W cotton material is engaged with the outer disc body of one of the seal portions, and a sleeve is interposed between each of the seal portions, and as described above. A tightener is screwed into the thread at the tip of the tightening member protruding from the outer disc body of the other seal portion of the pair, and one of the seal portions arranged as a pair is inert. A gas seal plug characterized in that a gas inlet and outlet pipe is provided, and a through hole is further formed in the axial direction of the tightening member to allow communication between the inside of the pipe sealed by the seal portion and the outside. .

(Function) When inserted into a pipe, the annular packings, which form a pair and are placed at a predetermined distance through the sleeve, are placed in a stable state. By tightening the tightening member screwed onto the tightening member, both of the paired annular packings are tightly sealed to the inner surface of the tube body. By introducing and discharging inert gas from the inert gas supply and discharging pipes, a gas seal is established between the pair of annular banks as described above.

By forming the j′Ii hole in the tightening material, it is possible to circulate between the inside of the pipe sealed by the sealing part and the outside, and the internal gas is led out to the outside when the pressure inside the sealed pipe becomes high. . This outlet may connect a flexible tube or the like to the clamped end to release the gas at a remote location.

(Example) A specific embodiment of the present invention as described above will be described as shown in the accompanying drawings.A set of disc members 1. 1, an annular packing 2 interposed therebetween is formed of an elastic material and has a lumen 21 that opens inward.
are adopted as a pair, the tightening material 3 is inserted into these sealing portions 10 and 10, and the base end of the tightening material 3 is inserted into one of the sealing portions 10.
Attaches to the outer disk part body 1 at and both seal parts 1
A sleeve 4 is interposed between each inner disc part body 1a, la of 0.10 mm, and a press tube 5 is assembled coaxially with the tightening member 3 to the outside disc part body 1 of the other seal part 10. Tightening material 3
A tightening member 6 is screwed onto a threaded portion 3a formed at the tip of the inert gas inlet and outlet pipes 7, 7 to the other seal portion 10 as necessary. An inert gas is filled between the annular packings 7 and 7 to form a seal.

Regarding the inclination angle of the taper part 1) described above, the disc part body 1,
It is preferable that the taper angle is approximately 60 inches (55 to 65 inches) with respect to the 13th surface, and when the taper angle is at this level, the annular packing 2 is preferentially pushed out in the circumferential direction by the tightening operation described later, and the sealing state is easily achieved. can be formed. As shown in FIG. 1, it is preferable to use a wing nut or the like as the fastener 6 when the tip of the fastener 3 is provided to protrude outside the open end of the pipe 15 to which it is applied, but the fastener 6 according to the present invention In some cases, it may be set deep inside the tube, and in such cases, it should be of a form suitable for using an appropriate rotation operating tool. However, the above-mentioned welding is generally performed on the open end of the pipe 15 in many cases, and the closing seal according to the present invention is set at an appropriate distance from such a welded part to prevent damage to the packing. In order to avoid this, it is preferable that the clamping member 6 can be operated outside the open end of the pipe 15 even in the setting state with such a spacing in the illustrated embodiment. As mentioned above, both seal parts are provided with appropriate spacing, and although the annular packing 2 of a relatively large diameter is assembled around the tightening material 3 of a relatively small diameter, it is simply a pipe. 15, it can be positioned without falling down just by inserting it inside.
As mentioned above, when the locking head of a suitable rotation operating tool is inserted into the pipe 15 to operate the tightening member 6, it is particularly necessary to make the tightening member 3 protrude long from the other seal portion 10. In other words, it is also possible to have a more compact structure in which the tightening member 3 is made shorter and the pressing tube 5 is omitted.

Further embodiments of the invention are shown in Figures 3 and below.

That is, in the above-mentioned Fig. 1.2, a solid rod-shaped material is used as the tightening material 3, and therefore, by employing this product in the pipe 15, the inside of the pipe 15 is closed. However, the present invention does not necessarily require the use of such a solid rod-shaped material, and in some cases, a pipe material having a through hole 3h as shown in FIG. can do.

That is, when a pipe material having the through hole 3h is used as described above, especially if the through hole 3h is opened into the pipe 15, vaporized residual oil gas will rise inside the pipe 15 regardless of the seal formed by the present product. When the temperature and pressure are increased, it can be discharged outside the piping and ventilated into the piping as appropriate, i.e., work in which inert gas, etc., is introduced into the piping, or gas in the piping is discharged, such as a carrier gas. can be done.

Of course, the embodiments shown in Figs. 3 to 7 can also be used in the same manner as in Figs. 1.2 by providing a plug or other sealing means to the inner hole 3h of the tightening member 3. It is a great advantage that a variety of uses can be realized by using such a small plug.

To further explain the device according to the present invention as described above, if the device according to the present invention as described above is inserted into an arbitrary position in the pipe 15 as shown in FIG. The disk 1 in the other seal part is pressed,
This pressing force presses the packing 2 between the opposing disc 1a and pushes it out in the circumferential direction to form a sealed state, and the disc 1a, the collar 4 and one seal are passed through the packing 2. At the same time, the disc 1 at one seal part is pulled in the direction opposite to the pressing force of the disc 1a through the tightening member 3, and this one seal At the same time, the packing 2 can also be compressed and extruded in the circumferential direction to similarly form a sealed state. That is, in the case of the present invention, the packings 2.2 in both seal portions perform a sealing action together, and they also act to prevent each other from collapsing, so that a stable sealing state can be maintained precisely by tightening the single tightener. It can be achieved. Furthermore, there is no room for drying shrinkage or cracking like in the conventional method, so at least if there are no ventilation parts on the inner surface of the pipe due to rust or blistering of the paint film, an appropriate seal can be completed with just the above-mentioned tightening operation. . However, in the case where the pipe 15 is used with residues and other anti-fouling materials, the aforementioned rust, blistering of the paint film, etc. on the inner surface of the pipe 15, even if the anti-fouling layer remains as a ventilation structure, in this case, In this case, an inert gas is sealed in the space between the two seals through the inlet and outlet pipes 7.7, and this is appropriately circulated to completely prevent gas leakage into the pipe 1.5. Welding and other work can be carried out smoothly. Of course, even under conditions where such a ventilation structure does not exist, if a gas seal is formed by filling in an inert gas, a double sealing structure is formed for the inside of the pipe 15, and sufficient safety can be ensured. In the second invention shown in FIGS. 3 to 7, it is further possible to release the gas inside the pipe 15 to the outside, or send gas or other gas into the pipe from the outside, and it is also possible to take out the fluid inside the pipe 15. is also possible. For example, in the case where there is a liquid component in the pipe 15, it is possible to effectively take out the liquid accumulated above the 3h line of the through hole as a trickle, and to form an effective sealing relationship with respect to the gas component. If a small plug body is adopted, the above-mentioned through hole 3h can be used to close it off.

"Effects of the Invention" According to the basic invention of the present invention as explained above, the tightening material 3 is inserted into the two seal portions 10 and 10 in which a packing material is interposed between the pair of disks, respectively, and the sealing material 3 is integrally formed. Since it is used, there are a plurality of seal parts 10.
10, an effective anti-collapsing effect can be obtained between the two, in other words, when it is charged and set in a pipe, a stable setting can be obtained automatically without the need for any special operation or supporting force. By operating the nut or other tightening means screwed onto the tightening member 3 of the set thus set, both seal portions 10 and 10 as described above are tightened simultaneously and equally. Therefore, it is easy to handle, and since a pipe 7.7 for supplying and discharging inert gas is provided on one side of the seal portion 10.10, there is no space between the two seal portions 10.10. It is possible to seal by sealing an inert gas, that is, it can achieve the desired gas sealing purpose even if it is applied while the inner surface of the pipe 15 is resistant to rust, paint blisters, residue, etc. This invention has great industrial effects.

In the second invention, in addition to the effects of the above-mentioned basic invention, the gas etc. in the sealed pipe can be taken out as appropriate, and abnormally high pressure in the sealed pipe can be effectively avoided, and under safe conditions. This invention can also be used to weld tube ends, and has great industrial effects.

[Brief explanation of drawings]

The drawings show embodiments of the invention, the first
2 is a front view of the gas seal plug according to the present invention, and FIG. 3 is a side view of another embodiment of the present invention. FIG. 4 is a side view of another embodiment of the present invention. 5 is a rear view thereof, FIG. 6 is a front view thereof, and FIG. 7 is a sectional view taken along the line ■...■ in FIG. 5. However, in these drawings, 1 is the outer disk body, la
is the inner disk body, 2 is the annular packing, 3 is the tightening material, 4
is a sleeve, 5 is a pressure tube, 6 is a strained yuzu, 7 is an inert gas supply and discharge tube, 10 is a sealing part, 1) is a taper part,
15 is a pipe, and 21 is an inner cavity. Patent applicant: Mutsubishi Rubber Co., Ltd. Inventor: Tadashi An Naka
Daido 1) Kanade -
郎I祿e1 纂 J 劫阜 4 I s7 眫

Claims (3)

[Claims] (1) A pair of seal parts each having an annular packing made of an elastic material interposed between a pair of disk parts each having a tapered part facing each other on the circumferential side are arranged, and these seal parts are arranged as a pair. A tightening member is inserted into the sealing member, and the proximal end of the tightening member is engaged with the outer disc body of one of the seal portions, and a sleeve is interposed between each of the seal portions, and the pair is arranged as described above. The tightening element is screwed onto the thread at the tip of the tightening material protruding from the outer disk body of the other seal section, and inert gas is supplied to one of the seal sections arranged as a pair. A gas seal plug characterized by having an inlet and an outlet pipe. (2) A pair of seal parts each having an annular packing made of an elastic material interposed between a pair of disk parts each having a tapered part facing each other on the circumferential side are arranged, and these seal parts are arranged as a pair. A tightening member is inserted into the sealing member, and the proximal end of the tightening member is engaged with the outer disc body of one of the seal portions, and a sleeve is interposed between each of the seal portions, and the pair is arranged as described above. The tightening element is screwed onto the thread at the tip of the tightening material protruding from the outer disk body of the other seal section, and inert gas is supplied to one of the seal sections arranged as a pair. A gas seal plug characterized in that an inlet and an outlet pipe are provided, and a through hole is further formed in the axial direction of the tightening member to allow communication between the inside of the pipe sealed by the seal portion and the outside. (3) Either claim 1 or 2, in which a tightening element is screwed to a tightening member protruding to an appropriate length from the outer disk body of the other seal part via a press tube. The gas seal plug described in item 1.