JP7101981B2 - Piping test jig and connection adapter used for the test jig in water supply construction - Google Patents

Description

The present invention relates to a pipe test jig in water supply construction and a connection adapter used for the test jig, and is between a water meter with a saddle and a water meter, that is, a sluice valve and a water meter. The purpose is to develop a test jig for performing a pressure resistance test by connecting to a stainless steel ball water stopcock (hereinafter referred to as "B valve") installed in.

Generally, a commercially available water pressure test pump (FIG. 9) is used to test the water pressure of the water supply pipe branched from this type of water distribution main.

The above-mentioned water pressure test pump is a device for measuring whether the pressure resistance is sufficient and whether there is a leak when water works or water installation is performed. In each house, water services are installed, but most of them are received from water pipes from the municipalities, and construction work is done for that purpose. Once installed, it is necessary to check that it can be used correctly and that it is installed without problems, and this test pump is used for that purpose. Water pressure is important in water services, which changes the water supply capacity to the home, so check if there is any problem.

And if it is in an abnormal state, there is a possibility that a leak has occurred at the construction stage, so check it. After the leak occurs, it is checked by further checking after making corrections.

In the water pressure test using such a water pressure test pump, when the water pressure test is performed from the B valve, the conventional invention (Japanese Patent Laid-Open No. 2018-066165) describes the bag on the HIVP side of B-HIVP as shown in FIG. The nut is removed, and a cap nut 120 having a plug coupler 160 at one end of the test jig 130 and a female screw at the other end is screwed into the outer diameter screw 3n of the valve 30. Then, the pressure resistance test was performed by connecting the connecting male screw 30 at the tip of the hose of the hydraulic pump 26 shown in FIG. 9 to the plug coupler 160 at one end. Therefore, the withstand voltage test from the SSP (stainless steel corrugated tube connection) side of B-SSP and B-HIVP could not be performed.

By the way, when a B-valve B-SSP (both are connected to a wavy pipe) was used in the design of water supply construction by the municipality, it was necessary to perform a test from the SSP side. In this case, since the pipe diameter on the SSP side is different from the pipe diameter on the HIVP side, it is necessary to newly prepare a plurality of adapters dedicated to the SSP side in addition to the adapter used for the pipe diameter on the HIVP side.

Japanese Patent Application Laid-Open No. 2018-066165 Japanese Patent Application Laid-Open No. 2009-115570

The above-mentioned Patent Document 1 describes the B valve 30 as shown in FIG. 8 on the way from the water distribution main of the water supply to the water meter of the water supply pipe which is branched and arranged in the piping test jig in the water supply extraction construction. One end is connected to the water supply pipe 2 on the SSP side of the pipe, and the test jig 130 with a plug coupler having a straight female screw is screwed into the straight male screw 3n of the pipe outer diameter on the other end (HIVP) side where nothing is connected. It fits. Then, the socket coupler 35 (FIG. 9) at the tip of the pressure-resistant hose provided on the hydraulic test pump with a length of about 2 m is connected to the plug coupler 160 on the HIVP side.

Next, Patent Document 2 is a water pressure test pump 26 (FIG. 9) performed by operating a lever-type handle that is common in this field, and a socket coupler 28 provided at the tip of a pressure-resistant hose 27 is attached to the HIVP side of the B valve. The structure is such that the water pressure test of the water supply pipe is performed by connecting to the plug coupler 160 with one touch.

However, in the conventional connection method, the water pressure test jig 130 (FIG. 8) to be joined to the water pressure test pump of Patent Document 1 is screwed to the HIVP side pipe outer diameter screw of the B valve, which is made of brass and is relatively expensive. Since it has a structure of a dedicated hydraulic test jig having five types of matching nominal diameters, it cannot be connected to a pipe outer diameter screw on the SSP side that has a different shape from the pipe outer diameter.

In order to perform _a water pressure test by screwing it into the pipe outer diameter screw 31 on the SSP side of the B valve, it is necessary to separately prepare a dedicated water pressure test jig with 5 different nominal diameters. It doesn't become.

Next, the straight screw portion 1/4 (nib) of the pressure resistant hose attached to the hydraulic test pump of Patent Document 2 and the taper screw 1/2 (yongbu) of the test meter bushing are screwed by the water contractor. The reality is that parts are procured and connected.

Further, as described above, among many straight screws provided at the tip of the hydraulic pressure resistant hose of Patent Document 2, the member for connecting the straight screw portion and the taber screw portion is special and difficult to procure. Therefore, there was a tendency for a contradiction to occur in which straight screws and taber screws were connected and piped.

In order to solve the above-mentioned conventional problems, the present invention provides a piping test jig for performing a pressure resistance test from a B-SSP (stainless steel corrugated pipe connection).

The first of the present invention is a circular pedestal having an outer diameter that matches the inner diameter of a cap nut with a hole on the SSP side of a B valve and a cylinder that stands up and is fixed to the center of the pedestal in a piping test jig in water supply construction. A connection adapter consisting of a shaped nipple and a plug coupler provided at the tip of the nipple is set on a cap nut with a hole and attached to the open end of the B valve.

The second aspect of the present invention is the piping test jig in the water supply construction of the water supply according to the first invention, in which both ends of the opening of the B valve have the same diameter for SSP, and the water pressure test is performed from either end of the pipe diameter. The union nut of the connection fitting and the socket coupler at the end of the pressure-resistant hose, which is connected to the pump via the socket coupler, are set on one of the cap nuts and connected to the plug coupler of the connection adapter.

The third aspect of the present invention is the diameter at which the outer diameter of the circular pedestal is in contact with the inner diameter of the annular packing of the cap nut with a hole in the connection adapter used for the piping test jig in the water supply construction of the water supply according to the first or second invention. Then, a raised portion with a female screw is formed on the surface of the pedestal, a male screw to be screwed into the female screw of the circular pedestal is provided at the base of the tubular nipple, and a male screw is also provided at the tip of the tubular nipple. , A cap nut that is screwed into the male screw at the tip of the tubular nipple is provided at the base of the plug coupler.

Since the present invention has the above configuration, it has the following effects.
First, of the two types of B-valve, B-SSP and B-HIVP, there is only a method of performing a pressure resistance test by removing the cap nut with a hole on the HIVP side of B-HIVP and connecting a test jig. However, according to the present invention, it is safe and easy to perform a pressure test from the SSP side of the B valve B-HIVP and the SSP side at both ends of the B-SSP.

Second, the connection adapter, which also conducts a pressure test from the SSP side of the B valve, can be molded simply by assembling a machined circular pedestal, a tubular nipple, and a coupler with a cap nut, so it is extremely easy to achieve uniform quality. It can be manufactured in large quantities while securing it.

Third, the connection adapter attached to the SSP side of the B valve is not screwed into the pipe outer diameter screw on the SSP side, but is inserted into the inner diameter of the cap nut with a hole that is screwed into the pipe outer diameter on the SSP side. Because of the structure, it is economical to reduce the size and weight and reduce the manufacturing cost.

Fourth, in the "B-SSP" type B valve where the inner diameters of the pipes on the SSP side and the SSP side are the same, the water pressure test can be performed from either end with one type of connection adapter, and the work can be done. It's quick and efficient.

Fifth, since the outer diameter of the circular pedestal of the connection adapter is in contact with the inner diameter of the annular packing in the cap nut with a hole, the same axis as the axis of the B valve is maintained by itself. The connection adapter can hold and fix the shaft center by screwing and tightening the cap nut with a hole to the pipe diameter of the B valve.

It is a schematic front view which shows the water supply pipe which branches from a water distribution main, and reaches the B valve, a sluice valve, a water meter, and the vicinity of a faucet. It is a perspective view of the state where the SSP water supply pipe is connected to both ends of the B valve. It is a perspective view of the state in which the cap nuts with holes at both ends of the B valve removed from the SSP water supply pipe of FIG. 2 are removed. It is a perspective view which attached the connection adapter to the cap nut with a hole on the left side of the B valve removed from the SSP water supply pipe of FIG. It is a partial vertical front view of the connection adapter. It is sectional drawing which follows the 6-6 line of FIG. It is a partial longitudinal front view of a state in which the tip portion is projected to the outside of the cap nut with a hole of the B valve and the base end portion is housed in the inner diameter and set. It is a perspective view which provided the test jig with a ready-made plug coupler on the pipe outer diameter screw connected to the HIVP water supply pipe on the opposite side to the SSP water supply pipe of a B valve. It is a partial longitudinal front view of the hydraulic pressure test pump connected to the connection adapter of FIG.

Next, to explain the embodiment of the present invention, a diversion faucet with a saddle is installed at a predetermined position in the underground water distribution main, and a B valve and a sluice valve are installed on the way from the diversion faucet to the faucet of a house or the like. , Place a water meter (water meter), connect the SSP water supply pipe between the diversion faucet and the B valve, connect the SSP water supply pipe between the B valve and the sluice valve, and connect the sluice valve The laying of the water supply is completed by connecting the HIVP to the adjacent water meter and the faucet of the house.

In the above pre-completion laying work, a circular pedestal having an outer diameter that matches the inner diameter of the cap screw with holes on the SSP side at both ends of the B valve, a tubular nipple that stands up and is fixed to the center of the circular pedestal, and the tubular nipple. A connection adapter consisting of a plug coupler provided at the tip is attached to the nipple screw.

Then, when the manager of the municipality of the city, ward, town, or village gives an instruction to perform a water pressure test from the B valve, a circular pedestal having an outer diameter that matches the inner diameter of the SSP side-hole nipple screw and the center of the circular pedestal. A hydraulic test is carried out by attaching an adapter consisting of a tubular nipple that stands up and is fixed to the nipple and a plug coupler provided at the tip of the nipple to the cap screw.

Then, the connection adapter is formed with a raised portion for providing a female screw on the surface of the circular pedestal, a male screw to be screwed to the female screw of the circular nipple is provided at the base of the tubular nipple, and a male screw is also provided at the tip of the tubular nipple. Is provided, and a cap nut with a hexagonal hole to be screwed into the male screw at the tip of the tubular nipple is provided at the base of the plug coupler.

Further, a water pressure pump is connected to the connection adapter attached to the left end of the B valve to perform a water pressure test between the B valve and the sluice valve. In addition, by connecting a hydraulic pump to the connection adapter attached to the right end of the B valve, the pressure resistance of the water supply stopcock between the B valve and the water distribution main and the water supply stopcock before reaching the faucet in the house Test for water leaks.

Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a water distribution main, and 2 is a water supply pipe on the SSP side that branches from the water distribution main 1 and is laid up to the B valve 3. The water supply pipe is formed by forming _a plurality of wavy 21 in the middle of a stainless steel pipe at predetermined intervals. 4 is a water supply pipe forming a wavy 4 ₁ laid from the B valve 3 to the sluice valve 5, 6 is a water meter connected to the sluice valve 5, and 7 is a water distribution PVC pipe laid from the water meter 6 to the faucet 8. (VP). Reference numeral 9 denotes a water diversion faucet with a stainless steel saddle provided on the water distribution main 1, and 10 indicates an anticorrosion film covering the water distribution main 1. In the figure, 25 is a joint socket for a water supply pipe.

The B valve 3 is a stainless steel ball stopcock, and the SSP is a flexible stainless steel pipe that connects the water distribution main 1 and the B valve 3. Further, HIVP refers to an impact-resistant rigid vinyl chloride pipe from the B valve 3 to the sluice valve 5 of the water meter and the water meter 6 to the faucet 8. The model in which one end of the B valve 3 is connected by SSP and the other end by HIVP is called "B-HIVP". There are five types of tube diameter sizes for SSP and HIVP, which are 20, 25, 30, 40, and 50 in nominal diameter. Therefore, there are five types of B valves with a pipe diameter that match this.

In FIGS. 2 to 4 and 7, a cap nut 11 with a hole for connecting the water supply pipe 2 of the SSP is screwed into the pipe outer diameter screw 3 ₁ on the left end side of the B valve 3, and the pipe outer diameter screw 3 on the right end side. A cap nut 12 with a hole for connecting the water supply pipe 4 of the SSP to ₂ is screwed. Reference numeral 3p indicates packings provided at both ends of the B valve 3 for preventing water leakage.

In FIGS. 5 to 7, 13 is a connection adapter used for a piping test jig in water supply construction according to the present invention, and includes a circular pedestal 14, a tubular nipple 15, and a bag-shaped plug coupler 16 with a nut. Consists of. The circular pedestal 14 is formed so that its outer diameter can be attached in contact with the inner diameter of the annular packing in the cap nut 11 with a hole, and the pedestal surface is provided with raised portions 17 having female screws 18 provided at both ends. Base of a tubular nipple provided with male screws 19 and 20 Male screw 19 is screwed into the female screw 18 of the circular pedestal 14, and the male screw 20 at the tip of the tubular nipple is integrally molded with the base of the plug coupler 16. It is screwed into a cap nut 21 with a hole in the shape. 22 and 23 are holes for cap nuts 11 and 12. In FIG. 7, reference numeral 24 denotes an annular packing mounted inside the cap nut with a hole, and the outer diameter of the circular pedestal 14 charged in the annular packing comes into contact with the inside of the packing to hold the axial center of the connection adapter 13. It is configured to do. Reference numeral 3p indicates an annular packing for preventing water leakage provided on the open end surface of the B valve 3.

In FIG. 9, reference numeral 26 denotes a water pressure test pump, which includes an operation handle 27, a pressure gauge 28, and a water supply steel pipe 29. 30 is a male screw for connection on the water supply pipe 29 side, 31 is a union nut of a connection fitting connected to the male screw 30, 32 is a socket coupler of a connection fitting connected to the union nut 31, and 33 is connected to a socket coupler 32 at one end. A plug coupler 34 is provided, and a socket coupler 35 for connecting to the plug coupler 16 of the connection adapter 13 attached to the B valve 3 is provided at the other end.

[Specific assembly example]
In FIGS. 2 to 4, the procedure is as follows. (1) Loosen the cap nut 11 with a hole on the left end side of the B valve 3, that is, the water distribution main ₁ side SSP water supply pipe 2, from the pipe outer diameter screw 31 and remove it from the end of the SSP side water supply pipe 2 (FIGS. 2 and 2). Left side of 3). (2) Remove the flat washer (not shown) pre-loaded as a part from the cap nut 11 with a hole. This flat washer has an outer diameter in contact with the inner diameter of the annular packing 24.
(3) The connection adapter 13 of FIG. 6 is inserted into the cap nut 11 with a hole, and the plug coupler 16 is projected outward from the hole 22 of the cap nut 11. At this time, the outer diameter of the pedestal 14 is in contact with the inner diameter of the annular washer 24. That is, the pedestal 14 is molded to have the same diameter as the outer diameter of the flat washer (left side of FIG. 4, FIG. 7). This state is referred to as setting the connection adapter 13 on the cap nut 11 with a hole. (4) Next, the cap nut 11 with _a hole is screwed into the SSP pipe outer diameter screw 31 of the B valve 3, and the pedestal 14 of the connection adapter 13 is circular in the inner diameter of the annular packing 24 attached to the cap nut 11 with a hole. The outer diameters of the pedestals 14 are in contact with each other to hold the axis. When the cap nut 11 with a hole is screwed into the pipe outer diameter screw 31 of the B valve ₃ in this state, the pedestal 14 is pressed against the annular packing 3p to maintain watertightness and prevent water leakage (FIG. 7).

A case where the water pressure test is performed in the above configuration will be described with reference to FIG. The union nut 31 of the connection fitting is connected to the male screw 30 at the tip of the water supply pipe 29 in the water pressure test pump 26.

Next, the plug coupler 34 of the pressure resistant hose 33 is connected to the socket coupler 32 of the connection fitting located on the opposite side of the union nut 31.

Further, a cap nut 11 with a hole screwed into the socket coupler 35 of the pressure-resistant hose 33 on the left end side (left side in FIG. 4) of the B valve ₃ , that is, the pipe outer diameter screw 31 for the SSP water supply pipe located on the water distribution main side. When the plug coupler 16 of the set connection adapter 13 is inserted and connected with one touch, the preparation for starting the test by the hydraulic test pump 26 is completed.

When performing a hydraulic test on the right end side of the B valve 3 (right side in FIG. 4), that is, on the sluice valve 5 side, the B valve 3 is subjected to the same procedure as the left end side pipe outer diameter screw 3 ₁ in FIGS. Remove the cap nut ₁₂ with a hole from the pipe outer diameter screw 32. Then, the plug coupler 16 of the connection adapter 13 set in the cap nut 12 with a hole on the right end side of the B valve 3 is projected outward from the hole 23 of the cap nut 12. In this state, the cap nut 12 with a hole is screwed into the cap nut 12 with a hole into the outer diameter screw 3 ₂ for the SSP water supply pipe of the B valve 3, and the outer diameter of the pedestal 14 of the connection adapter 13 is built into the cap nut 12 with a hole. The axial center of the connection adapter 13 is held in contact with the inner diameter of a certain annular packing 24. Further, the pedestal 14 is pressure-contacted with the annular packing at the open end of the B valve to 3a to ensure watertightness.

When the water pressure test is performed on the SSP on the left end side, it is performed in the same manner as the steps described in the above paragraphs [0033] to [0035].

According to the present invention, in addition to the water supply pipe connected to the SSP corrugated pipe connected to both ends of the B valve, the water supply pipe connected to the SSP corrugated pipe is connected to one end of the B valve, and the water supply pipe connected to the HIVP side is connected to the other end. It is now possible to test the water pressure up to the B valve and the water meter by using a connection adapter for the B valve connected to the SSP corrugated pipe, which could not be actually tested in the past. In the hydraulic test, the number of parts used can be saved and the work efficiency can be improved.

1 ... Water distribution main 2 ... SSP water supply pipe on the water distribution main side 3 ... B valve (stainless steel ball stopcock)
4 ... Water supply pipe on the water stop valve side 5 ... Partition valve 6 ... Water meter 7 ... Water supply pipe to the water meter and faucet 8 ... Faucet 9 ... Water distribution main with stainless caps 10 ... Covering the water distribution main Anticorrosion film 11 ... Cap nut with SSP hole on the water distribution main side 12 ... Cap nut with SSP hole on the sluice valve side 13 ... Connection adapter body 14 ... Circular pedestal 15 ... Cylindrical nipple 16 ... Plug coupler with cap nut 17 ... Raised part of the circular pedestal 18 ... Female screw of the circular pedestal 19 ... Male screw at the base of the tubular nipple 20 ... Male screw at the tip of the tubular nipple 21 ... Cap nut with a hole in the tubular nipple 22 ... Hole in the cap nut with a hole on the left side 23 ... Hole of cap nut with hole on the right side 24 ... O-ring of cap nut with hole 25 ... Water supply pipe joint socket 26 ... Water pressure test pump 27 ... Operation handle 28 ... Pressure gauge 29 ... Water supply pipe 30 ... Connection male screw 31 ... Connection bracket Union nut 32 ... Socket coupler for connection fitting 33 ... Pressure-resistant hose 34 ... Plug coupler 35 ... Socket coupler

Claims (3)

A cap nut (11) with a hole in the B valve (3), a circular pedestal (14) having an outer diameter matching the inner diameter of the cap nut (12) with a hole on the opposite side thereof, and an upright fixing at the center of the circular pedestal. A connection adapter (13) including a tubular nipple (15) to be used and a plug coupler (16) provided at the tip of the tubular nipple is set in the cap nut (12) with a hole, and the cap with a hole is set. A pipe test jig in water supply construction of a water supply, characterized in that a nut (12) is attached to the open end of the B valve (3). Said The open ends of the B valve (3) are both SSP-compatible with the same diameter, and both ends areConnect one (12) of the cap nuts (11) and (12) with holes through which the connection adapter (13) is inserted to one of them.
Water pressure test pump (26)ofA socket coupler (35) at the end of a pressure-resistant hose connected to a union nut (31) via a socket coupler (32)., SaidCap nuts with holes (11) and (12)One of the cap nuts with holes (12)Set toSaidOf the connection adapter (13)SaidThe jig for piping test in the water supply construction of the water supply according to claim 1, which is connected to the plug coupler (16). Said The outer diameter of the circular pedestal (14) isSaidCap nut with hole(11) ・ (12)The diameter is set to be in contact with the inner diameter of the annular packing (24).The circleA raised portion (17) provided with a female screw (18) is formed on the surface of the pedestal.SaidAt the base of the tubular nipple (15)SaidOf the circular pedestalSaidA male screw (19) to be screwed into the female screw (18) is provided, andSaidCylindrical nippleofA male screw (20) is also provided at the tip,SaidAt the base of the plug coupler (16)SaidCylindrical nippleofAt the tipSaidThe adapter used for a piping test jig in water supply construction according to claim 1 or 2, provided with a bag-shaped nut (21) screwed into a male screw (20).

Images