KR20070087777A - Pressure measuring and intercepting instrument for low pressure pipe - Google Patents

Abstract

An air-tightness measuring and pressure cutoff tool for a low pressure pipe is provided to perform an air-tightness test without forming test holes on the pipe. An air-tightness measuring and pressure cutoff tool(101) for a low pressure pipe includes a fixing member(103), one or more air-tightness member(104), a contact plate(105), a press nut(106), and a valve. The fixing member is extended to a predetermined length from one side of a fixed disk(103a) inserted into a pipe, and has a guide rod(103b) having one end with a screw portion(103c). The fixing member has a through hole(103d) penetrated from the fixed disk to the guide rod. The air-tightness member has a first insertion hole(104a) fitted to the guide rod of the fixing member. The air-tightness member is made of a flexible material tightly contacting an inner surface of the pipe. The contact plate has a second insertion hole(105a) to be fitted to the guide rod, and is disposed at one side of the air-tightness member. The press nut is coupled to the screw portion of the guide rod such that the contact plate presses the air-tightness member. The valve is coupled to the guide rod so as to open/shut the through hole.

Description

Pressure measuring and intercepting instrument for low pressure pipes

Figure 1a is a view showing a state in which the perforated pipe for the airtight inspection of the pipe during the conventional pipe construction.

Figure 1b is a view showing the structure and equipment for inspection of the air tightness of the pipe during construction of the prior art Figure 1a.

Figure 2 is a partially cutaway perspective view showing the structure of the airtight measurement and pressure blocking jig of the low pressure pipe according to the present invention.

Figure 3a is a view showing a state of use of the pipe when the pipe construction in accordance with the present invention.

Figure 3b is a cross-sectional view showing the working state of the jig inserted into the pipe during construction of the invention according to the invention.

<Description of the symbols for the main parts of the drawings>

101: Jig (or jig) for airtight measurement and pressure blocking of low pressure pipe

102: piping 103: fixing member

104: airtight member 105: contact plate

106: pressurized nut 107: valve

108: fixing bracket 109: fixing bolt

110: pressure plate 111: bearing

112: Leakage test equipment

The present invention relates to the airtight measurement and pressure blocking jig for low-pressure pipes, in particular, during the construction work, the work process of drilling the airtight inspection hole in the pipe for the airtight inspection of the pipe before the pipe joint construction of the pipe is excluded, and After the airtight inspection, the cutting process of cutting a certain portion of the perforated pipe is excluded, and the airtight inspection and pipe jointing process can be performed without cutting a portion of the pipe, so that the pipe per unit length in the overall pipe construction The present invention relates to an airtight measurement and pressure shut-off jig for low-pressure piping that can reduce the construction cost since the number of uses is reduced.

In general, the city gas supplied to each customer forms a pipeline in a form buried underground, and this pipeline has a structure in which a plurality of gas pipes are connected to each other.

In addition, the pipe line is supplied with natural gas from the Korea Gas Corporation, or mixed with air to LPG is supplied to the general consumer through the earth pressure regulator, local pressure regulator, the gas to the local pressure regulator is supplied in the medium and high pressure state, On the other hand, the gas is supplied at a relatively low pressure on the pipeline installed so as to be supplied from the local pressure regulator to each customer.

Here, each of the pipes constituting the pipe line should be ensured hermeticity and airtight in that the natural gas, which is a flammable material to be transported, so that the construction of the pipe or to replace the old or damaged pipe on the existing pipe construction When the pipe work is performed, as shown in FIG. 1A, the pipe 1 is disposed at the embedding position, the airtightness of the pipe 1 is tested, and the pipe joint work is performed.

In other words, the above airtightness test is a test for confirming the leakage after pressurizing non-combustible gas such as air or nitrogen at the test pressure, so that gas does not occur at 1.1 times the maximum working pressure or at a pressure of 84 kPa or more. 1, the both ends of the pipe to be constructed as shown in FIG. 1 is closed with a closing cap (2), and then a predetermined position on the outer diameter surface of the pipe (1) with a hot tee (TEE) (3) The airtight test is carried out by installing a test hose, a pressure gauge, and a magnetic pressure recorder (5) for the airtight test, as shown in FIG. 1B.

On the other hand, through the series of airtight test process as described above, the pipe (1) ensured airtightness is to cut the position adjacent to the airtight inspection hole and then the pipe joint construction.

The pipe joint or pipe joint construction can be presented in various ways, such as using welding, fusion, heterogeneous joint pipe (T / F) depending on the pipe.

However, the conventional gas tightness test as described above not only delays the working time in that the airtight inspection hole should be drilled in the pipe 91 but also ends one end of the pipe 1 after the airtight test is completed. As shown in Fig. 2, the length of the pipe 1 is shortened because it is to be cut to a predetermined length, and the cut pipe 91 must be discarded, resulting in waste of materials, and the pipe per unit length for the length of the entire pipe 91). Since the number of increases, there was a problem that the material cost and construction cost increases.

The present invention has been made in order to solve the above problems to simplify the work process, and to prevent the waste of materials in advance to enable the airtight test without drilling the airtight inspection hole in the pipe.

The above object is formed by extending a predetermined length from the other side of the fixed disk 103a of a predetermined size inserted into the inner diameter of at least one of both ends of the pipe 102 toward the other side, and having a relatively smaller outer diameter than the fixed disk 103a. A fixing member 103 having a threaded portion 103c formed at the other end of the guide rod 103b and having a through hole 103d penetrating from the fixed disc 103a to the guide rod 103b; The first insertion hole 104a is formed to be extrapolated to the guide rod 103b of the fixing member 103, and at least one airtight member made of an elastic material to be in close contact with the inner diameter surface of the pipe 102 to maintain airtightness ( 104); A second insertion hole 105a formed to be extrapolated to the guide rod 103b, and an adhesion plate 105 disposed on the other side of the airtight member 104; A pressure nut 106 fastened to the threaded portion 103c of the guide rod 103b so that the contact plate 105 presses the airtight member 104 to one side; It is achieved by the airtight measurement and pressure blocking jig 101 of the low-pressure pipe, characterized in that it comprises a valve 107 coupled to the other end of the guide rod (103b) to open and close the through hole (103d).

Here, formed at the other end of the contact plate 105, the 'b' shaped to interfere with the insertion direction of the pipe 102 at the other end of the pipe 102 to interfere with the pipe 102 and the contact plate 105 A fixing bracket 108; It is preferable to further include a fixing bolt 109 is fastened to the screw hole (108a) formed in the fixing bracket 108 to compress the pipe 102 to fix the contact plate 105 to the pipe 102, A third insertion hole 110a is formed to be extrapolated to the guide rod 103b to be disposed between the plurality of airtight members 104, and the pressure plate 110 to press the airtight member 104 disposed on one side and the other side. It is preferable to further include.

At least one surface of both sides of the pressing plate 110 protrudes at a predetermined inclination angle toward the third insertion hole 110a, and the fixed disc 103a and the contact plate 105 are opposite to each other. And it is preferable to further include a bearing 111 is protruded at a predetermined inclination angle toward the other side and one side, and fixed to the other side of the second insertion hole 105a of the contact plate 105.

Hereinafter, the configuration and operation of the present invention will be described with reference to FIGS. 2 and 3.

First, the airtight measurement and pressure blocking jig 101 (hereinafter, jig 101) of the low-pressure pipe according to the present invention may be installed at both ends of the pipe 102, one end of the pipe 102 There is a sealing as the conventional cap 2 and the jig 101 of the present invention on any one of the two ends of the pipe 102 may be airtight test.

Hereinafter, on the assumption that the jig 101 is installed at the other end of the pipe 102 will be described the configuration, structure and operation.

First, the fixing member 103 of the jig 101 according to the present invention has a disc-shaped fixed disk (103a) having a diameter enough to be inserted into the inner diameter of the pipe 102 is formed at one end, the fixed disk ( The guide rod 103b of a predetermined length is formed extending from the other side of the 103a toward the other side, and the guide rod 103b is formed in a cylindrical shape, and the through hole 103d formed in the guide rod 103b is formed. As shown in FIG. 2, it penetrates into one end of the stationary disk 103a.

In addition, a threaded portion 103c is formed at the outer diameter of the other end of the guide rod 103b, and the guide rod 103b includes a plurality of airtight members 104 made of an elastic material and having a first insertion hole 104a formed therein. Extrapolated, the airtight member 104 may be molded of silicone or the like as a soft rubber material, and the present invention is not limited to the material of the airtight member 104.

Meanwhile, as described above, the pressure plate 110 having the third insertion hole 110a is formed between the airtight member 104 and the airtight member 104 between the plurality of airtight members 104 which are extrapolated to the guide rods 103b. It is extrapolated to the guide rod 103b in the form of being arranged as shown in FIG.

Here, at least one surface of both sides of the pressing plate 110 protrudes at a predetermined inclination angle toward the third insertion hole 110a. Preferably, as shown in FIG. 2, the pressing plate 110 is hermetically sealed. Since it is disposed between the member 104 and the airtight member 104, it is conical to protrude in a conical shape toward the third through hole (103d) on both sides of the expansion of the airtight member 104 or the inner diameter of the pipe 102 and The adhesiveness of the airtight member 104 outer diameter surface can be improved.

In addition, the fixed disk 103a is projected in a conical shape toward the other side (the direction in which the guide rod 103b extends), and the contact plate 105 is conical shaped toward the fixed disk 103a side (one direction). When the contact plate 105 is pressed toward the fixed disk 103a side (one side direction) by the press nut 106 to be described below so as to protrude from both sides to face each other, the contact plate 105 and Preferably, the airtight member 104 disposed between the pressure plate 110 and the stationary disk 103a is elastically expanded.

The close contact plate 105 having the second insertion hole 105a is extrapolated to the guide rod 103b penetrating into the first insertion hole 104a of the airtight member 104 disposed on the other side. The pressing nut 106 is fastened to the threaded portion 103c of the guide rod 103b penetrating into the second insertion hole 105a of the bar, and a fixing bracket having a 'b' shape is formed at the other end of the contact plate 105. Forming a plurality of 108, when the jig 101 is inserted into the inner diameter of the pipe 102, the outer surface of the close contact member and the 'b' shaped fixing bracket 108 formed in the 'c' shaped seating groove While the other end of the pipe (102) is inserted (interfering), while fastening the fixing bolt 109 to the screw hole (108a) of the fixing bracket 108 in the state that the jig 101 is inserted into the pipe (102) By allowing the fixing bolt 109 to pressurize the outer diameter of the pipe 102, when the jig 101 is inserted into the inner diameter of the pipe 102 as shown in FIG. 3A, full insertion of the jig 101 is prevented. So also, of course, it is preferable that the jig 101 by the internal pressure of the gas and the pipe 102 to be injected during the tightness test to prevent the developer pushed in the other direction.

On the other hand, the other end of the second insertion hole (105a) of the contact plate 105, so that the bearing 111 is installed as shown in Figure 2 so that the pressure nut 106 is fastened to be in close contact with the contact plate 105 excessively When the force is applied to prevent the reduction of the clamping force of the pressing nut 106 or the rotational force of the pressing nut 106, and the other end of the guide rod 103b to which the pressing nut 106 is fastened by coupling the valve 107 to the through hole ( Control the opening and closing of 103d).

Referring to Figures 3a and 3b attached to the operation (confidential test) of the airtight measurement and pressure-blocking jig 101 of the low-pressure pipe according to the present invention as described above are as follows.

First, as described in the prior art, one end of the pipe (102) is sealed with a closing cap (2) before an action is carried out to excavate the ground where the pipeline is to be constructed or to suspend the pipeline in the basement or inside the building. At the other end, as shown in FIG. 3A, the jig 101 according to the present invention is installed, and the fixing member 103, the airtight member 10, the pressure plate 110, and the contact plate 105 are formed at the other end inner diameter of the pipe 102. Jig (101) is inserted.

At this time, the 'b' shaped fixing bracket 108 formed on the outer diameter of the other end of the contact plate 105 interferes with the outer diameter of the other end of the pipe 102 (extrapolation) to prevent complete insertion of the contact plate 105.

Then, when the fixing bolt 109 is fastened to the fixing bolt 109 by the screw hole 108a formed in the fixing bracket 108 to press the outer diameter of the pipe 102, accordingly, the contact plate 105 is By the fixing bracket 108 and the fixing bolt 109 is to be maintained in a stable fixed state inserted in the pipe (102).

In addition, it is possible to prevent the jig 101 from being separated even if an overpressure occurs by increasing the internal pressure of the pipe 102 for the airtight test.

When the jig 101 is inserted and fixed to the other end of the pipe 102 as described above, as shown in FIG. 3B, the pressure nut 106 fastened to the other end of the guide rod 103b is further fastened. When the pressurizing nut 106 is fastened, the contact plate 105 is fixed to the pipe 102 and thus remains fixed regardless of whether the pressurizing nut 106 is fastened, and the pressurizing nut 106 also adheres to the contact plate. Since the 105 is fixed, it may not move in one direction along the threaded portion 103c of the guide rod 103b.

Accordingly, the guide rod 103b is forced to be transferred to the other direction along the female thread of the pressing nut 106 as the pressing nut 106 is fastened.

At this time, the fixed disc (103a) formed at one end of the guide rod (103b) is guide rod (103b) between the fixed disc (103a) and the contact plate 105 as the guide rod (103b) is transported together as the other end is transferred. The airtight member 104 and the pressure plate 110, which are extrapolated to the pressure plate, are pressed toward the contact plate 105 side.

As described above, when the fixed disc 103a is conveyed while pressing the airtight member 104 and the pressure plate 110 to one side, the airtight member 104 made of an elastic material (for example, silicon material) is shown in FIG. 3B. As described above, the pipe 102 is sealed by being in close contact with the inner diameter of the pipe 102.

Here, the pressure plate 110 is disposed between the airtight member 104 and the airtight member 104 so that the plurality of airtight members 104 have the fixed disc 103a and the pressure plate because the fixed disc 103a is pressurized to the other side. It is preferable to be pressurized by both sides by the 110 and the contact plate 105.

In particular, as shown in Figure 3b, the stationary disk 103a and the contact plate 105 is protruded in a conical shape in a direction facing each other, the pressing plate 110 is directed toward the third insertion hole (110a) on both sides Since it protrudes in a conical shape, the edge of the first insertion hole 104a of the airtight member 104 is first pressed, and the airtight member 104 expands and expands to the outer diameter side so that the airtight member 104 expands and expands. As the contact area between the members 104 becomes wider, the sealing effect can be increased.

In addition, the bearing 111 provided at the edge of the second insertion hole 105a of the contact plate 105 may secure the moving distance due to the fastening of the pressure nut 106 without forcibly fastening the pressure nut 106. Also, even if the operator does not fasten the pressure nut 106 after a certain distance, the restoring force of the airtight member 104 acts as a force to push the guide rod 103b to one side. It has a fastening force.

When the pipe 102 is sealed by the fastening of the pressurized nut 106 as described above, the airtight test equipment 112 including the pressure measuring meter and the magnetic pressure recorder for the airtight test in the pipe 102 is connected to the pipe ( Airtight test of the valve (107) and the piping (102).

Then, in the state where the airtight test is completed, the airtight test equipment is dismantled from the valve 107, the pressure nut 106 is released and the airtight member 104 is expanded and restored, and the fixing bolt 109 of the fixing bracket 108 is removed. By dismantling, the jig 101 is detached from the pipe 102 so that the pipe joint construction of the pipe 102 can be performed.

As described above, the present invention does not need to puncture the airtight inspection hole in the pipe for the airtight test, so that the working time for the airtight test is shortened, and when the pipe is connected after the airtight test, the cutting process of cutting the pipe of the perforated part By eliminating this, there is another effect of shortening the work time and reducing waste of materials generated by cutting and discarding the pipe. In particular, the problem that the length of the unit pipe is shortened by cutting the pipe is eliminated. By increasing the length of the unit pipe with respect to the length of the overall decrease in the number of pipes per unit length has the effect that can significantly reduce the material cost and construction cost.

Claims (6)

A predetermined length is extended from the other side of the fixed disk of a predetermined size inserted into the inner diameter of at least one of the both ends of the pipe toward the other side, the thread is formed on the other end of the guide rod having a relatively smaller outer diameter than the fixed disk, guided from the fixed disk A fixing member having a through hole penetrated to the rod; A first insertion hole is formed to be extrapolated to the guide rod of the fixing member, and at least one airtight member made of an elastic material to be in close contact with the inner diameter surface of the pipe to maintain airtightness; A second insertion hole is formed to be extrapolated to the guide rod, and a close contact plate disposed on the other side of the airtight member; A press nut fastened to the screw part of the guide rod so that the contact plate presses the airtight member to one side; The airtight measurement and pressure blocking jig of the low-pressure pipe, characterized in that it comprises a valve coupled to the other end of the guide rod to open and close the through hole. The method of claim 1, A 'b' shaped fixing bracket formed at the other end of the contact plate and interfering with the insertion direction of the pipe at the other end of the pipe so that the pipe and the contact plate interfere with each other; The airtight measurement and pressure blocking jig of the low-pressure pipe, characterized in that it further comprises a fixing bolt which is fastened to the screw hole formed in the fixing bracket to press the pipe to be fixed to the pipe. The method of claim 1, A third insertion hole is formed to be extrapolated to the guide rod to be disposed between the plurality of hermetic members, and further includes a pressure plate for pressurizing the hermetic members disposed on one side and the other side. Blocking jig. The method of claim 3, At least one surface of both sides of the pressure plate protrudes at a predetermined inclination angle toward the third insertion hole for the airtight measurement and pressure blocking jig of the low-pressure pipe. The method of claim 1, The stationary disk and the contact plate is the airtight measurement and pressure-blocking jig of the low-pressure pipe, characterized in that the other side and one side facing each other protruded at a predetermined inclination angle toward the other and one side. The method of claim 1, Airtight measurement and pressure blocking jig of the low-pressure piping, characterized in that it further comprises a bearing fixed to the second insertion hole edge of the other side of the contact plate.

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