JPS6111593Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a socket for a pipe joint that increases the flow rate without changing the inner diameter of the fluid flow passage provided inside the socket.

A conventional pipe joint, as shown in FIGS. 7 to 10, for example, has lock balls 3, 3 for connecting the plug accommodated in a plurality of tapered holes 2 provided on the peripheral surface of the distal end of a large diameter portion 1 for accommodating the plug. , this rock ball 3
A sleeve 4 that presses the ball toward the center is attached to the outer periphery of the large diameter portion 1 so as to be movable back and forth, and a movable body 5 that pushes the lock ball outward is housed within the large diameter portion so as to be movable back and forth. It has been done. This movable body 5 is attached so as to be able to move back and forth to a fluid circulation tube 6 that protrudes into the large diameter portion, and since the tube guides the back and forth movement of the movable body 5, the tube 6 and the movable body 5 are mechanically connected to each other. A certain polymerization portion L was required. However, when the second seal 7 attached to the inside front surface of the movable body 5 is deformed and protrudes toward the center when it abuts against the plug, it comes into close contact with the fluid circulation tube to prevent the flow path from being blocked. Therefore, a small diameter part 9 is formed at the tip of the cylinder 6 through a tapered part 8, and this small diameter part 9 is extended to the second seal 7, and then a small diameter part 9 is formed at regular intervals from the circumference of the tip of the small diameter part 9. multiple protruding support rods 10;
10 connected into one valve pusher body 11 is positioned up to approximately the tip of the large diameter portion 1. Further, valve ports 12, 12 are formed between the support rods 10, 10, respectively. That is,
The diameter of the fluid flow cylinder is M ₁ , and the diameter of the small diameter part is M _2.
Then, the relationship is M ₁ > M ₂ . Therefore, there was a drawback that the flow rate passing through the valve port 12 was significantly reduced.

In view of these conventional drawbacks, the present invention retracts the position of the valve port provided at the tip of the fluid flow cylinder toward the fluid outflow side, and makes maximum use of the diameter of this cylinder to form the valve port. The purpose is to make it possible to increase the flow rate per unit time without changing the diameter of the tube.

Embodiments of the present invention will be described below with reference to the drawings.

A large-diameter plug insertion hole 21 for inserting a plug is formed at the tip, a small-diameter nipple 22 is provided at the end of the insertion hole 21 on the outflow side of the fluid, and a fluid flow tube 26 with an inner diameter equal to that of the nipple is formed in the plug insertion hole. Tapered holes 23, 23 are formed at regular intervals on the peripheral surface of the tip of the insertion hole 21 toward the center, and lock balls 2 are inserted in each of them.
4, 24 are loosely fitted, and the lock balls 24,
The sleeve 25, which presses the nipple 24 toward the center, is attached to the outer periphery of the tip of the main body 36 having the insertion hole 21 so as to be movable back and forth, thereby forming the socket 20.
A fluid flow tube 26, which is an integral linear member of the same diameter as the fluid flow tube 2, projects from the tip of the nipple portion 22 concentrically into the plug insertion hole 21, i.e., projects onto the axial center of the socket, and a movable tube 27, which pushes the lock balls 24, 24 outward, is housed in the plug insertion hole 21 so as to be movable back and forth, and the movable tube 27 is constantly biased forward from the rear by a compression spring 28. Since the movable tube 27 is guided by the outer periphery of the fluid flow tube 26, an overlapping portion L is required as in the conventional pipe joint shown in Figure 7. The seal between the tube 26 and the movable tube 27 is provided by the movable tube 27.
The fluid flow passage is provided at the periphery of the opening at the tip of the tube 26, and the rear end of a long valve pressing body 32 that extends to the axis of the fluid flow passage, is positioned at the center of the insertion hole 21, and is brought into abutment with a valve body 44 (described later).
Two or more narrow support arms 31, 3 extending to the axis of the
1, and a first valve port 33, 33 is formed between each of the support arms. In this case, the support arm 31 connecting the inner wall portion at the tip of the fluid flow tube 26 and the rear end of the valve pressing body 32 may be provided so as to protrude perpendicular to the axis of the fluid flow tube, or may be provided so as to protrude at an angle to the axis. Furthermore, the support arm 31 is contracted to form the valve pressing body 32. Here, the fluid flow tube 26 has the same diameter as the conventional fluid flow tube 6, and the tip opening of this tube 26 and the rear end of the long valve pressing body 32 are directly connected by two or more support arms 31. Compared to the conventional one, the valve port 33
The position of the valve orifice 3 can be significantly set back toward the outflow side, and is hardly affected by the deformation of the second seal.
Since the outside diameter N of the pipe 3 is the same as the outside diameter of the pipe 26 (M ₁ =N), the flow area of the fluid is significantly enlarged as compared with FIG.

Note that 34 is a plurality of locking portions protruding from the inner surface of the insertion hole 32, and the locking portions 34 are engaged with an annular locking recess 35 provided on the outer periphery of the movable body 27. The range of motion is regulated.

A plug 40 has a small-diameter cylindrical portion 41 on the fluid inflow side at the rear, and an insertion cylindrical portion 42 that can be inserted into the insertion hole 21 of the socket on the distal end side. A valve body 44 is springed from the inside by a spring (not shown) at the second valve port 43 provided.
is seated. Reference numeral 45 denotes a seal ring mounted inside the tip of the insertion tube, and an engagement groove 46 with which the lock ball 3 engages is provided on the outer periphery of the tip of the insertion tube.

Next, the effect will be explained.

Normally, as shown in FIG. 1, the lock ball 24 is pushed outward by the movable body 25.
The plug 40 is ready to be inserted immediately. Next, when the tip of the plug 40 is inserted into the insertion hole 21 of the plug, the second seal 3 attached to the movable cylinder 27
0 and the insertion cylinder part 42 of the plug are joined and sealed, and then the valve pusher body 32 and the valve body 4
4 butts. Further, when the plug 40 is pushed toward the socket, the valve body 44 is moved back by the valve pushing body 32, and the valve port 43 is opened. In this case, the movable cylinder is retracted by the plug 40 against the compression spring 28. When the movable cylinder retreats to a certain position, the tapered hole 23 and the engagement groove 46 match, the lock ball 24 falls into engagement with the engagement groove 46, the sleeve 25 is advanced by the spring 25a, and the socket 2
0 and the plug 40 are connected. In this case, the sleeve 25 is locked by a locking portion 21a of a slightly larger diameter provided on the outer periphery of the tip of the insertion hole 21.

Therefore, even if the second seal 30 abuts against the tip of the insertion tube 42 and is deformed and pushed out toward the center,
As shown in FIG. 6, since the valve ports 33, 43 are located inside the plug, this deformation of the second seal 30 is hardly affected. That is, no matter how much the second seal 30 is deformed, the valve port 4 of the plug
There is no deformation below the diameter of 3, and there is no reduction in the flow path.

As described above, the present invention includes a plug that incorporates a valve body, and a valve pusher that presses and opens the valve body against the action of a compression spring when coupled with the plug, protruding from the axis of the plug insertion hole. In a pipe joint consisting of a socket, a fluid flow cylinder having the same inner diameter as the nipple part is provided inside the socket, the end of the fluid flow cylinder is opened toward the plug insertion hole, and the open end of the fluid flow cylinder is opened toward the plug insertion hole. Two or more short and small supporting arms extending at a relatively steep angle to the axis of the fluid flow cylinder and converging on the axis are formed in the part, and the valve pusher directly projects into the converging part of the supporting arms. As a result, the valve port provided at the side end of the fluid flow cylinder, which has the same inner diameter as the nipple and has a limited diameter, can be made as large as possible, and as a result, the flow rate can be further increased compared to conventional ones. Can be done. Therefore, even with the same gas appliance, the firepower can be further strengthened.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is an overall sectional view, Fig. 2 is a front view thereof, Fig. 3 is a partially cutaway side view of the socket inner cylinder, and Fig. 4 is a guide cylinder. Fig. 5 is a front view of the same, Fig. 6 is a perspective view showing the tip of the
The figure is a partially cutaway cross-sectional view of the plug and socket connected, Figures 7 to 10 are conventional ones, Figure 7 is a cross-sectional view of the socket, Figure 8 is a front view, Figure 9 is a front view of the socket inner cylinder, Figure 10 is a front view of the socket inner cylinder.
The figure is a perspective view showing the tip portion of the fluid flow cylinder. 20...Socket, 21...Plug insertion hole, 2
2...Nipple portion, 26...Fluid flow tube, 28...
...Compression spring, 31... Support arm, 32... Valve pusher body, 33... Valve port, 40... Plug, 44... Valve body.

Claims (1)

[Scope of utility model registration request] In a pipe joint consisting of a plug with a built-in valve body, and a socket having a valve pusher drilled on the axis of the plug insertion hole, which presses the valve body open against the action of a compression spring when coupled with the plug. A fluid flow passage having the same inner diameter as the nipple is provided inside the socket, and the end of the fluid flow cylinder is opened toward the plug insertion hole, and the shaft of the fluid flow cylinder is connected to the open end of the fluid flow passage. A socket for a pipe joint, in which two or more short and small support arms are formed that extend up to the center at a relatively steep angle and converge on the axis, and the valve pusher body is provided to protrude directly from the convergence part of the support arms.