JP2005265585A - Pressure proof test system of pipe coupling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To conduct pressure proof test while a protection cap is installed on a pipe coupling. <P>SOLUTION: A flow path 3 where fluid passes is formed. The test device comprises a pipe coupling A where a connector 1 for connecting a pipe C is formed at the end of the flow path 3, a protection cap B installed at the connector 2 of the pipe coupling A and covering the connector 2, a holder 20 where the first coupling 22 holding the pipe coupling A in which the protection cap B is fitted is formed, and an adaptor 30 fixed to the holder 20, where a coat 31 covering the protection cap B is formed. In the protection cap B, a water path hole 15 communicating with the flow path 3 of the pipe coupling A is punched and coupled with the coat 31 of the adaptor 30 while being held by the holder 20 so that pressure proof test can be conducted while being installed in the connector 2 of the pipe coupling A. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pressure test apparatus for a pipe joint, which is used in a pressure test performed to confirm the presence or absence of water leakage from a pipe when piping work is performed at a construction site.

  Pipe joints used for connecting pipes at construction sites, etc., have a flow passage through which fluid such as water, hot water, or mixed water passes, and a connection part for connecting the pipe to the end In order to protect the connection part during storage before the pipe joint is used at a construction site or during transportation, and to prevent foreign matter from entering the flow path from the opening hole of the connection part. In addition, a protective cap made of synthetic resin is attached to the end of the connecting portion. The protective cap uses the elastic force and is fitted and attached to the connection portion with a single touch. The shape of the protective cap includes a cylindrical portion that covers the outer peripheral surface of the connection portion and a lid portion that closes the opening hole. Accordingly, since the connecting portion of the pipe joint is covered with the cylindrical portion of the protective cap, the connecting portion is not damaged, and foreign matter can be prevented from entering the flow path from the opening hole.

  By the way, after piping work at a construction site, in order to confirm the presence or absence of water leakage caused by poor connection or the like, a pressure test for supplying high-pressure compressed air or pressurized water into the pipes and pipe joints is required. In order to conduct a normal pressure test, it is necessary to seal the flow path through which the fluid passes by attaching a plug to the connection part of the pipe joint, but a normal protective cap can be easily attached to or removed from the pipe joint. Since it is required to be present, it simply covers the connection part of the pipe joint, and if it is attached when performing a pressure test, it will come off from the pipe joint when high pressure is applied. Therefore, only when the pressure test is performed, it is necessary to remove the protective cap from the pipe joint once and install a new plug for the pressure test, which is troublesome. Moreover, if the protective cap once removed is reattached to the fitting after the pressure test has been completed, the protective cap removed from the fitting during the pressure test will be lost or the storage location may be forgotten. It was inconvenient because I had to look for it.

  There exists patent document 1 as what solved such a malfunction, and in this patent document 1, a protective cap is comprised by the protector main body and the inner stopper fitted inside this protector main body, and usually a protector main body On the other hand, the inner plug is fitted to prevent the entry of foreign matter into the pipe joint, and the inner plug can be removed from the main body of the protective equipment when the pressure test is performed.

JP 2001-199470 A

  However, with such a protective cap, the inner plug is removed from the main body of the protective device so that water can be passed during the pressure test. Then, during the pressure resistance test, the protective cap removed from the main body of the protective equipment was lost, or the place where it was placed was forgotten and had to be searched.

  The present invention has been made paying attention to such problems existing in the prior art, and the problem is to be able to perform a pressure resistance test with the protective cap attached to the pipe joint. It is.

  To achieve the above object, the pipe joint pressure resistance test apparatus according to the first aspect of the present invention has a flow passage through which a fluid passes, and a connection portion for connecting a pipe is formed at an end of the flow passage. A pipe fitting, a protective cap that is attached to the connecting portion of the pipe fitting and covers the connecting portion, and a holder formed with a first coupling portion for holding the pipe fitting to which the protective cap is fitted, An adapter fixed to the holder and formed with a covering portion that covers the protective cap, and the protective cap has a water passage hole communicating with the flow path of the pipe joint, and the adapter is held in the holder It is possible to perform a pressure resistance test in a state in which it is coupled to the covering portion and attached to the connection portion of the pipe joint.

  According to a second aspect of the present invention, in the pipe joint pressure resistance test apparatus according to the first aspect of the invention, the holding member is formed with a first coupling part for holding the pipe joint, and the first coupling part includes a pipe joint, a protective cap, and the like. The rail part which pinches | interposes is formed.

  According to the first aspect of the present invention, since the adapter is coupled to the protective cap attached to the pipe joint through the holder during the pressure resistance test, the adapter does not come off even when a high pressure is applied to the protective cap. The pressure resistance test can be performed with the protective cap attached, and the loss of the protective cap that occurs when the protective cap is removed can be prevented, and the pressure resistance test can be performed with peace of mind.

  According to the second aspect of the present invention, the protective cap is securely held to the holder while being attached to the pipe joint, and the adapter can be easily fitted to the protective cap.

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

  As shown in FIGS. 1 to 3, the pipe joint A has connection portions 1 and 2 formed at both ends, and a flow passage 3 through which a fluid passes is formed through the inside thereof. 2 is connected to a pipe C for supplying fluid such as water, hot water, mixed water or the like. In the present invention, a protective cap B is attached to a connecting portion 2 at one end of a pipe joint A. The protective cap B is formed at a substantially cylindrical main body portion 11 and one end of the main body portion 11. And a flange portion 12 having a larger diameter, and in the internal axial direction of the main body portion 1 and the flange portion 12, an opening hole that fits into the connection portion 2 of the pipe joint A and the flange portion 4 adjacent to the connection portion 2. 13 is formed.

  The shape of the protective cap B is a substantially cylindrical shape that can cover the entire connecting portion 2 and the flange portion 4 of the pipe joint A. When the protective cap B is attached to the connecting portion 2 as shown in FIG. The inner peripheral surface of 13 is in watertight contact with the plurality of seal members 5 and 5 mounted on the outer peripheral surface of the connection portion 2, and the fluid passing through the flow path 3 of the pipe joint A is the outer periphery of the connection portion 2. Water is prevented from leaking from between the surface and the opening 13 of the protective cap B to the outside.

  The flange portion 12 of the protective cap B has a substantially disk shape, is formed to have a larger diameter than the flange portion 4 formed adjacent to the connecting portion 2 on the outer peripheral surface of the pipe joint A, and the protective cap B is attached to the connecting portion 2. It fits into the collar part 4.

  A substantially circular lid 14 is integrally formed on the end surface of the main body 11 of the protective cap B, and the center of the lid 14 allows passage of fluid passing through the flow path 3 of the pipe joint A. A water hole 15 is formed. The water passage hole 15 is drilled so that the fluid passing through the flow path 3 of the pipe joint A can pass through. However, when the pipe joint A is stored or transported to a construction site, the flow path 15 is formed. In order to prevent foreign matter from entering from the outside, the diameter of the hole 3 is relatively small, and the hole diameter is, for example, 2 mm or smaller than 2 mm. In the present embodiment, only one water passage hole is formed at the center of the lid, but the number and position thereof are not particularly limited. Moreover, although the water passage hole is a round hole, the shape thereof is not particularly limited to the round hole, and may be, for example, a + character shape or a-character shape.

  2 and 3 show a state in which the protective cap B is attached to the pipe joint A. When the protective cap B is attached to the connecting portion 2 of the pipe joint A during storage or transportation of the pipe joint A, the connection is established. Since the seal members 5 and 5 mounted on the portion 2 are covered with the main body portion 11 of the protective cap B, the seal members 5 and 5 are not exposed to the outside, and no foreign matter adheres to the seal members 5 and 5. In addition, the flow path 3 of the pipe joint A faces the lid portion 14 of the protective cap B, and the flow path 3 is closed by the lid portion 14, and foreign matter enters the flow path 3 through the lid portion 14. Never do. In addition, although a water passage hole is drilled in the lid portion, since this water passage hole has a small diameter, foreign matters having a diameter larger than that of the water passage hole cannot enter the flow path of the pipe joint. Absent.

  FIGS. 4 to 9 are explanatory views when a pressure test is performed with the protective cap B attached to the pipe joint A. The pressure test is performed by connecting the pipe joint A and the adapter 30 to the holder 20. It is performed in the state of wearing.

  The holder 20 is made of a synthetic resin material or a metal material having a substantially U-shaped cross section and a thin plate shape, and a thin plate-like substantially square-shaped base portion 21 and a first coupling bent at a substantially right angle from one side of the base portion 21. It is formed of a portion 22 and a second coupling portion 25 that is bent in a substantially right angle direction from the other side of the base portion 21 and projects in the same direction as the first coupling portion 22.

  A substantially U-shaped first fixing hole 23 is formed in the first coupling portion 22, and rail portions 24 are respectively formed on side pieces on both sides of the first fixing hole 23. Each rail portion 24 has a substantially U-shaped cross section composed of a lower plate 24a, an upper plate 24b, and a horizontal plate 24c, and the distance between the rail portions 24, 24 is substantially the same as the outer diameter of the flange portion 12 of the protective cap B. A rail groove 24d is formed between the plates 24a, 24b, and 24c, and the vertical distance between the rail grooves 24d is substantially the same as the vertical dimension of the flange portion 12 of the protective cap B. Further, the lateral width of the first fixing hole 23 is shorter than the outer diameter of the flange portion 4 of the pipe joint A, and the first coupling portion 22 and the second coupling portion 25 are connected with the protective cap B attached to the pipe joint A. The protective cap B is interposed therebetween, the flange portion 12 of the protective cap B is fitted into the rail groove 24d, and the flange portion 4 of the pipe joint A is seated on the periphery of the first fixing hole 23. The pipe joint A can be supported by the first coupling portion 22. Then, in a state where the flange portion 4 of the pipe joint A and the flange portion 12 of the protective cap B are sandwiched between the rail groove 24d of the first coupling portion 22, the pipe joint A and the protective cap B are moved along the rail groove 24d. Can be slid horizontally.

  The second coupling part 25 is formed so as to face each other with respect to the first coupling part 22, and a second fixing hole 26 is formed at a position slightly decentered from the center. The shape of the second fixing hole 26 is as follows. It is almost rectangular. The second coupling portion 25 is for supporting the adapter 30.

  The adapter 30 includes a covering portion 31 that covers the entire main body portion 11 of the protective cap B, and a shaft portion 32 that is integrally coupled to the covering portion 31 and is provided with a separately provided cock 33.

  As shown in FIG. 5, the covering portion 31 has a lower opening 34 on the bottom surface and an upper opening 35 having a smaller diameter than the lower opening 34 on the top surface. 35 communicates internally. The inner diameter of the lower opening 34 is substantially the same as the outer diameter of the main body 11 of the protective cap B, and an annular groove 36 is formed on the inner peripheral surface, and a seal member 37 is attached to the annular groove 36. The lower opening 34 is watertightly fitted to the main body 11 of the protective cap B without a gap. The shaft 32 is integrally coupled to the upper opening 35, and the shaft 32 is an internal axis. A passage 38 penetrates in the direction, and a stopper portion 39 is formed on the outer peripheral surface. The stopper portion 39 has substantially the same shape as the second fixing hole 26 formed in the second coupling portion 25 of the holder 20, and a pair of straight portions 39a, 39a and a pair of straight portions 39a, 39a are connected to each other. It consists of curved portions 39b, 39b, and the second fixing hole 26 can be inserted vertically. Since both the second fixing hole 26 and the stopper portion 39 are substantially rectangular, when the stopper portion 39 is rotated from a position positioned below the second fixing hole 26, the upper surface of the stopper portion 39 is The portion abuts on the peripheral edge of the second fixing hole 26, and the adapter 30 does not float from the second coupling portion 25 in this state.

  The cock 33 performs the pressure resistance test by extracting the air existing inside the pipe C connected to the pipe joint A and the pipe joint A to the outside when performing the pressure resistance test of the pipe joint A and the pipe C. This is for smooth operation, and is screwed into the passage 38 of the shaft portion 32, and an air hole 40 having a substantially T-shaped cross section is formed inside. Communication with the passage 38 is possible. A packing 41 is attached to the lower outer peripheral surface of the cock 33, and when the cock 33 is screwed to the back of the passage 38, the packing 41 is seated on the inner peripheral surface of the passage 38. When the cock 33 is operated in the direction of loosening, the packing 41 is separated from the inner peripheral surface of the passage 38, and the air inside the pipe joint A and the pipe C can be extracted to the outside. It can be done smoothly.

  Next, a procedure for performing a pressure resistance test after connecting the pipe joint A and the pipe C at the construction site will be described. When fitting F is stored before shipment or during transportation to the construction site, foreign matter may adhere to the seal members 5 and 5, or foreign matter may enter the flow path 3 to cause water leakage. Therefore, the protective cap B is attached to the connection portion 2 so as to cover the seal members 5 and 5 and the flow path 3. Then, it is stored or transported with the protective cap B attached to the connecting portion 2.

  When connecting the pipe joint A and the pipe C at the construction site and conducting a pressure test to confirm whether the connection state is normal, the pipe joint A with the protective cap B attached, The adapter 30 needs to be coupled to the protective cap B. In this case, the flange portion 12 of the protective cap B is engaged with the first engagement portion 22 of the holder 20 with the adapter 30 supported by the holder 20. That is, as shown in FIG. 7, the protective cap B has the flange portion 12 fitted in the rail groove 24 d formed in the first engagement portion 22 of the holder 20. Further, the adapter 30 causes the stopper portion 39 to float above the second fixing hole 26 of the holder 20. Next, the main body part 11 of the protective cap B and the covering part 31 of the adapter 30 face each other. Then, when the stopper portion 39 of the adapter 30 is inserted into the second fixing hole 26, the clothing portion 31 moves in a direction approaching the protective cap B and rotates so that the upper surface of the stopper portion 39 and the peripheral edge of the second fixing hole 26 face each other. Then, as shown in FIGS. 8 and 9, the protective cap B and the adapter 30 are coupled. In this state, the adapter 30 is coupled to the protective cap B, and the protective cap B and the pipe joint A are fitted to the rail portion 24 of the first coupling portion 22 and thus do not move up and down. The cap B does not float upward from the second coupling portion 25, and can supply air or water to the pipe joint A to confirm the presence or absence of water leakage.

  After the pressure resistance test is completed, the stopper portion 39 of the adapter 30 and the second fixing hole 26 of the holder 20 are rotated so as to face each other, and if the adapter 30 is pulled upward, the stopper portion 39 is moved to the second fixing hole 26. Therefore, the coupling state between the protective cap B and the adapter 30 is released, and the holder 20 and the adapter 30 are separated from the protective cap B.

  As described above, according to the present invention, the pressure resistance test can be performed with the protective cap mounted on the pipe joint, and the protective cap is not lost during the pressure resistance test.

It is a perspective view of a pipe joint and a protective cap in the pressure test apparatus for pipe joints of the present invention. In FIG. 1, it is a perspective view of the state which attached the protective cap to the pipe joint. It is a longitudinal cross-sectional view of the state where the protective cap is attached to the pipe joint. It is a perspective view of a pipe joint, a protective cap, a holder, and an adapter. It is a longitudinal cross-sectional view of an adapter. It is explanatory drawing in the case of supporting a pipe joint in a holder. It is explanatory drawing of the state by which the pipe joint and the adapter were supported by the holder. It is explanatory drawing of the state with which the protective cap and the adapter were couple | bonded in the state in which the pipe joint and the adapter were supported by the holder. It is a longitudinal cross-sectional view of a state where the protective cap and the adapter are coupled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2: Connection part 3: Flow path 15: Water flow hole 20: Holder 22: 1st coupling part 24: Rail part 30: Adapter 31: Cover part A: Pipe joint B: Protection cap C: Piping

Claims (2)

  A flow path through which a fluid passes is formed, a pipe joint in which a connection part for connecting a pipe is formed at an end of the flow path, and a protective cap that is attached to the connection part of the pipe joint and covers the connection part A protective cap having a first coupling portion in which a pipe joint to which the protective cap is fitted is held, and an adapter fixed to the holder and having a covering portion covering the protective cap. Has a water passage hole that communicates with the flow path of the pipe joint, and is connected to the sheath of the adapter while being held by the holder, and can perform a pressure test while being attached to the connection part of the pipe joint. A pressure test apparatus for pipe joints, characterized in that The first holding part is formed with a first coupling part for holding the pipe joint, and a rail part for sandwiching the pipe coupling and the protective cap is formed on the first coupling part. Pressure-resistant test equipment for pipe joints as described.

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