JPS6120394Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a non-blow-flowing system that can be used in fluid transport pipes for city gas, etc., without stopping the fluid transport inside the pipe, that is, in a non-flow state, and without the internal fluid leaking into the atmosphere. It is used when connecting branch pipes in the state, and is generally called a valve chii.
Specifically, it includes a nipple that can be screwed and connected to the inside of a branching socket that communicates with a branching hole formed in a fluid ring conduit or a branching hole of a clamp member attached to the fluid ringing conduit. , a cheese body that can be freely screwed and connected to the outside of the nipple, and a channel in the cheese body connected to the conduit by selecting a screw connection to the female thread formed in the nipple and a fixed holding to the upper end of the cheese body. The present invention relates to a non-flow conduit branching joint equipped with a closure that can be switched between a communication cutoff state and a communication connection state.

The conduit branching joint having the above structure has the advantage that branching work can be carried out in the above-mentioned no-flow, no-blow state in a rational and efficient manner, compared to conventional products in which the nipple and the cheese body are integrated. On the other hand, when the nipple and the cheese body are separated, there is a threaded connection between them, which did not exist in conventional integrated products, and there is a possibility of fluid leaking from this threaded connection. To avoid this, it is necessary to connect the cheese body to the nipple by strongly screwing it in. Conventionally, when strongly screwing the cheese body, the entire outer circumferential surface of the cheese body must be strongly screwed to prevent slipping. Since a pipe wrench that can be tightened and fixed was used, it was easy to damage the outer circumferential surface of the cheese body. In particular, the exterior coating applied to prevent corrosion and rust may be damaged.
There was a problem in that the coating film peeled off, resulting in a significant deterioration of the anti-corrosion and rust-preventing effects.

In view of the above circumstances, the present invention has a split structure that can advantageously perform branching work without any flow interruption or blowing as described above, and also provides a strong screw connection of the cheese body to a corrosion-resistant and rust-proof surface. The purpose is to be able to perform it effectively without causing any negative effects.

The non-flow type conduit branching joint according to the present invention has a split structure as described above, and the operation rotation is made by attaching the upper end part outer peripheral surface of the vertical position flow path part of the cheese main body at appropriate intervals in the circumferential direction. It is characterized by forming a force-receiving locked part.

That is, the cheese body is screwed into the nipple by forming a locked part for receiving the operation rotational force on the outer circumferential surface of the cheese body to be screwed into the nipple. In this case, it is preferable to use a cheese having a simple structure and having a locking part that engages only with the locked part, for example, as shown in FIGS. Since you can use a tool that does not require tightening the nipple, you can not only transmit the operating rotational force through the engagement structure and perform safe work without slipping, but even if the cheese body is strongly screwed into the nipple, the tool will not tighten. This prevents damage to the painted surface of the outer periphery of the cheese body. Therefore, it has become possible to firmly screw and connect the cheese body to the nipple without adversely affecting the corrosion-proof and rust-proof surface of the cheese body.

The embodiment of the present invention will be described below in detail based on illustrative drawings. As shown in Fig. 1, a two-piece type is fitted and fixed to the planned branching point of a fluid circulation conduit P such as a city gas pipe. A branch located in a state in which the clamp member K communicates with a branch extraction hole P ₁ which is bored in the fluid ring transmission conduit P in a non-flow, no-blow state through a shutter (not shown) attached to the upper end of the clamp member K and a drilling machine. A nipple ₁ which can be screwed and connected to a female threaded part _K2 formed inside the socket K1 with a closing member 3, which will be described later, screwed into the female threaded part K2 formed inside the socket K1, and this nipple 1.
an internal flow path _2A having an L-shaped cross section; and an internal flow path 2A having an L _- shaped cross section. In addition, the upper end of the vertical position flow path portion has a female threaded portion 7a in a penetrating state into which a male threaded portion 3e protruding from the center of the closure 3 can be screwed, and the A cheese body 2 having a female threaded portion 2a into which a lid member 7 can be screwed into which the closure member 3 can be fixed and held in its position by screwing the male threaded portion 3e, and
A male threaded portion 3e is threadably connected to and detachable from the female threaded portion 1a formed on the inner peripheral surface of the upper end of the nipple 1, and a male threaded portion 3e is connected to the upper end periphery of the nipple 1 when the male threaded portion 3a is screwed and connected to the female threaded portion 1a. The corresponding overhanging flange portion 3b and the lower end of each shaft of the operating tool 6 having a double shaft structure as shown by the imaginary line in FIG. and a different diameter groove 3c and female thread 3d that fit and screw together in a non-removal state.
By selecting between threading connection to the female thread 1a of the nipple 1 and fixed holding by pulling up to the upper end of the cheese body 2 and screwing the male thread part 3e into the female thread part of the lid member 7, A non-flow conduit branching joint having a closure 3 capable of switching the internal flow path 2A of the cheese body 2 to the conduit P between a communication cutoff state and a communication connection state as shown in FIG. Configure.

In the non-flow conduit branching joint described above, the outer peripheral surface of the upper end of the vertically oriented flow path portion of the cheese body 2 is provided at appropriately equal intervals in the circumferential direction, specifically, at central angles as shown in FIG. 3. Locking recesses 2B for passive operating rotational force are formed at 90 degree intervals, and the entire outer peripheral surface of the cheese body 2 is coated with a coating for corrosion and rust prevention. ing.

When connecting the cheese body 2 to the nipple 1 by screwing, as shown in FIG. A rotary operating handle 4b is integrally connected from one end in the circumferential direction toward the outer side in the radial direction, and recesses 2B are formed on the inner surface of the semicircular arc-shaped member 4a at equal intervals with the locked recesses 2B.
A tool 4 comprising a protruding locking protrusion 4c that engages with the
The cheese body 2 is screwed and connected to the nipple 1 by sequentially rotating it in the direction of the arrow A.

Incidentally, instead of the above-mentioned locking recesses, these may be replaced with locking convex portions 2B as shown in FIG. 4, and locking recesses 4c that engage with the locking convex portions 4c may be formed on the tool 4 side. , as the tool 4, as shown in FIG.
A locking protrusion 4c that can be freely extended and retracted in the radial direction using bolts or the like is attached to the inner peripheral surface of the annular member 4a, and a large number of operating handles 4b are provided on the outer periphery of the annular member 4a.
It is also possible to use a protruding one; in this case,
It has the advantage of being able to perform threaded connections efficiently with continuous rotation in one direction.

Next, to briefly explain the installation procedure of the above-mentioned non-flow conduit branching joint, ○A. Immediately after opening the shutter (not shown) after drilling the branch extraction hole _P1 for the conduit P, The nipple 1, which has been screwed into the socket K1, is screwed into the branching socket _K1 .

○B Remove the shutter.

○C Screw the cheese body 2 to the outside of the nipple 1 using the tool 4 as described above.

○D Connect the branch piping to the free end opening side of the cheese body 2.

E) The closure 3 is gradually screwed on and loosened, and the fluid flowing into the cheese body 2 is used to air purge the cheese body 2 and the branch piping.

○ After that, pull up the closure 3 to the upper end position of the vertical posture flow path part of the cheese body 2 and insert it into the female and male screw part 7.
A and 3e are screwed together to fix and hold the pipe in that position, thereby supplying the transport fluid to the branch pipe. In addition, 9 in FIG. 2 is a plug.

An operating tool 6 as shown by imaginary lines in FIG. 1 used for screwing, unscrewing, and pulling up the closure 3 is inserted into the cheese body 2 in an externally sealed state and is movable up and down. .

FIG. 6 shows a construction state in which the nipple 1 is directly screwed and connected to the tapped branch extraction hole _P1 formed in the conduit P.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the non-flow conduit branching joint according to the present invention; FIGS. 1 and 2 are overall longitudinal cross-sectional views, and FIG. 3 is an enlarged partially cutaway plan view of the main parts;
FIGS. 4 to 6 are an enlarged partially cutaway plan view of the main part and a longitudinal sectional view of the entire structure, respectively, showing the deformed structure. 1... Nipple, 2... Cheese body, 3... Closer, 1a... Female threaded part, 2A... Internal flow path of 2,
2B...Locked part, P...Fluid wheel transfer conduit, P ₁ ...
Branch extraction hole, K... Clamp member, K ₁ ...
Branch socket.

Claims (1)

[Scope of claim for utility model registration] Branch extraction hole formed in the fluid ring conduit P
P ₁ or a nipple 1 that can be screwed into the inside of the branch socket K ₁ communicating with the branch extraction hole P ₁ of the clamp member K attached to the fluid ring conduit P; The cheese body 2 can be freely screwed and connected to the outside, and the channel 2A in the cheese body 2 can be connected to the conduit by selecting the screw connection to the female thread 1a formed in the nipple 1 and the fixed holding to the upper end of the cheese body 2. P
It is a non-flow conduit branching joint equipped with a closure 3 that can be switched between a communication cutoff state and a communication connection state, and has a circumference on the outer circumferential surface of the upper end portion of the vertical posture flow path portion of the cheese body 2. A non-flow conduit branching joint characterized in that locked portions 2B for receiving operating rotational force are formed at appropriate intervals in the direction. The non-flow conduit branching joint according to claim 1, wherein the locked portions 2B are recessed portions.