JPH0136088Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Related Industrial Field) The present invention relates to the improvement of a pipe joint that is attached to, for example, a water supply port for mold cooling water and allows the flow rate to be confirmed.

(Prior art) For example, for items such as molds that are cooled by supplying cooling water, the cooling water that is supplied through one main supply pipe is distributed and supplied to multiple locations through branch pipes. However, the flow rate of cooling water must always be detectable.

In response to such demands, the present applicant filed an application for utility model registration on November 27, 1981, for a device entitled ``Pipe fitting that can confirm flow rate'' (hereinafter referred to as the "earlier device").

With this invention, it has become possible to easily detect the flow rate, but if limescale adheres to the inner surface of the transparent outer tube, the indicator for detecting the flow rate will be disabled unless the adapter is removed and the inner surface of the transparent outer tube is cleaned. It becomes difficult to see through. Therefore, removing the limescale remained an unsolved problem.

(Problems to be solved by the invention) The above previous invention has been improved to automatically remove limescale adhering to the inner surface of the transparent outer tube using a simple device, and maintain the transparency of the transparent outer tube for a long period of time. It's about getting it.

(Devised solution) A pipe joint that has an appropriate connection part such as a female or male thread or a plug on the end of the body and the adapter, and the body with one connection part has a connection part provided at the axial center of the body. In addition to providing a pot-shaped valve to open and close the liquid passage hole,
Facing the adapter having the other connection part, the base part has a liquid passage hole that is continuous with the liquid passage hole and extends through the outer peripheral surface part, and the tip part is provided with an extension part having a tapered shaft; Fitting the tip of the tapered shaft into the shaft center of the other connection part of the adapter, and
A transparent outer tube is sandwiched between the main body and the adapter and allows the tapered shaft portion to be seen through, and is integrally provided in a liquid-tight state, and a compression spring is attached to the outer periphery of the tapered shaft portion on the coaxial large diameter side. A ring-shaped indicator is fitted so as to be movable in the axial direction, and a rotor with blades that slides against the inner circumferential surface of the transparent outer tube is fitted adjacent to the indicator. It is characterized by the fact that

(Embodiment of the invention) The figure shows an embodiment of the invention, which includes a main body 1, an adapter 2 provided at one end of the main body, and both 1, 2.
The main cylindrical body of the pipe joint is constituted by the transparent outer tube 3 sandwiched therebetween. The main body 1 has a connecting portion 1a (internally threaded portion in the figure) at the outer end of the hexagonal head, and a tapered extension portion 1b protruding toward the adapter 2 is screwed to the other end.

A valve 4 for flow rate adjustment is provided next to the connection portion 1a of the main body 1. The valve 4 has a valve handle 5 attached to a hole provided toward the center of the main body 1.
The opening/closing degree can be adjusted by turning.
6 is the valve shaft, 7 is the shaft stopper,
8 is a set screw, and 9 is a ball valve. 10 is an O-ring, and 11 is a packing that contacts the ball valve 9. Reference numeral 12 indicates a scale indicating the rotation angle of the valve handle provided on the outer surface of the main body, that is, the amount of flow rate adjustment.

The tapered extension 1b is threadedly coupled 13 to the body 1 and is fitted with a spring 1 to seal the coupling.
A gasket 15 is provided which is pressed at 4.

The adapter 2 has a screw 16 at the tip of the tapered extension 1b.
is fixed. By tightening the screw 16, the transparent outer tube 3 is held between the main body 1 and the transparent outer tube 3. 17 is an O-ring fitted between the transparent outer tube 3 and the adapter 2, and 18 is an O-ring fitted between the transparent outer tube 3 and the main body 1.

The transparent outer tube 3 is provided with a scale 19 in the circumferential direction on its outer peripheral surface, so that the amount of movement of an indicator 20, which will be described later, can be read from this scale.

The tapered extension part 1b of the main body 1 consists of a conical part 1c and a cylindrical part 1d, and the adapter 2 is fixed by screwing the screw 16 into a female thread formed at the tip of the conical part 1c. Further, the inner diameter of the indicator 20 loosely fitted into the tapered extension part 1b is set to match the maximum diameter of the tapered extension part 1b. 21 is the cylindrical part 1d
The valve 4 is located in the middle of the liquid passage hole 22 and connects the central liquid passage hole 22 of the main body 1 and the liquid passage space 23 between the transparent outer tube 3 and the conical portion 1c. However, by restricting the valve 4, the amount of fluid flowing toward the liquid passage space 23 is reduced.

A compression spring 24 presses the indicator 20 in the space 23 in the direction of the maximum diameter of the conical portion 1c of the tapered extension portion 1b, and the other end of the spring is held inside the adapter 2.

The adapter 2 is fixed to the tapered extension part 1b by a boss 25 formed at its center, and several liquid passage holes 26 are provided around this boss. 27 is a female thread for connection that the adapter 2 has.

Reference numeral 28 denotes a rotor blade that is loosely fitted to the extent that the outer circumferential surface of the blade lightly slides into contact with the inner surface of the transparent outer tube 3. When no fluid is flowing, the rotor blades are sandwiched between the indicator 20 and an abutment surface 29 provided on the cylindrical portion 1d of the tapered extension. When the fluid flows inside the pipe joint, the indicator 20 is pushed by the fluid and moves to the right in the figure. At this time, the rotor blades 28 are rotated by the kinetic energy of the fluid, so the outer edge of the indicator 28 is rotated by the transparent outer edge. Remove water scale by lightly sliding on the inner surface of the pipe 3.

FIG. 3 is a perspective view of the rotor blade 28, in which a central hole 30 is formed in the center through which the conical portion 1c is inserted, and a plurality of blades 3 having a required width are arranged around the hole 30.
1 in a tomoe shape, and the tips 32 of the blades 31 are in sliding contact with the inner circumferential surface of the transparent outer tube 3. An intermediate portion 33 between the blades 31 of the rotor blade 28 is formed in a concave shape, and a liquid passage groove is formed in the portion 33. Note that the rotor blades 28 are set so that the blades 31 thereof face the main body 1 side.

(Operation of the device) When fluid is supplied from the direction of arrow X in FIG.
The fluid flows through 1→space 23→liquid passage hole 26. At this time, the indicator 20 is pushed to the right in the figure against the elastic force of the compression spring 24, but the movement of the indicator 20 allows the flow rate to be confirmed by the scale 19 provided on the transparent outer tube 3. At the same time, the kinetic energy of the fluid acts on the blades 31 of the rotor blades 28, causing the rotor blades 28 to rotate. At this time, since the indicator 20 is moving to the right, the rotor blades 28 also move following the indicator, and during the movement, scales and the like attached to the inner surface of the transparent outer tube 3 are removed.

When the flow of fluid stops, it is pushed back by the compression spring 24, one side comes into contact with the contact surface 29 of the cylindrical portion 1d, and the other side is pushed by the indicator 20 and remains stationary. Note that if the flow rate is constant, the rotor blades will only rotate at a certain position and limescale will form on other parts, but if you adjust the flow rate from time to time and move the indicator 20, the scale will be removed over the entire surface. Ru.

(Effects of the invention) According to the invention, the flow rate can be confirmed by the combination of the transparent outer tube installed in the pipe joint and the indicator, and the rotor blades are rotated by the kinetic energy of the fluid. This makes it possible to remove limescale from inside the transparent outer tube, allowing the operator to clean the area around the indicator without doing anything, and to check the flow rate correctly.

[Brief explanation of drawings]

FIG. 1 is a side view cut in four halves of the pipe joint. FIG. 2 is a sectional view taken along the - arrow in FIG. 1. FIG. 3 is a perspective view of the rotor blade. Figure 4 is a front view of the rotor blade. FIG. 5 is a cross-sectional view taken from FIG. In the figures: 1...Main body, 1a...Connection part (of the main body), 1b...Tapered extension part, 1c...Conical part, 1d...Cylindrical part, 2...Adapter, 3...Transparent outer tube, 4...Valve, 5...Valve handle , 6...valve shaft,
7...Shaft stopper, 8...Set screw, 9...Ball valve, 10...O ring, 11...Packskin,
12...Scale, 13...Screw joint, 14...Spring, 15...Packing, 16...Screw, 17...O ring, 18...O ring, 19...Scale, 20...Indicator, 21...Liquid passage hole, 22...Liquid passage Hole, 23
...Liquid passage space, 24...Compression spring, 25...Boss, 26...Liquid passage hole, 27...Female thread, 28...Rotor blade, 29...Abutment surface, 30...(Rotor blade) center opening, 31...(Rotor Feather) Feather, 32...
The tip (of the feather), 33...the middle part (of the feather).

Claims (1)

[Scope of utility model registration request] A pipe fitting that has an appropriate connection part such as a female or male thread or a plug on the end of the main body and the adapter, where the main body with one connection part has a liquid passage hole provided in the axial center of the main body that can be opened and closed. Along with providing a cock-shaped valve,
Facing the adapter having the other connection part, the base part has a liquid passage hole that is continuous with the liquid passage hole and extends through the outer peripheral surface part, and the tip part is provided with an extension part having a tapered shaft; The tip of the tapered shaft part is fitted into the shaft center of the other connection part of the adapter, and the transparent outer tube through which the tapered shaft part can be seen is inserted between the main body and the adapter. In addition to being integrally provided in a tight state, a compression spring is applied to the outer periphery of the tapered shaft portion to bias it toward the larger diameter side of the same shaft.
A ring-shaped indicator is fitted so as to be movable in the axial direction, and a bladed rotor that slides against the inner peripheral surface of the transparent outer tube is fitted adjacent to the indicator. Pipe fitting with scale removal device that allows flow rate confirmation.