KR930001573Y1 - Connector - Google Patents

Abstract

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Description

Fluid fittings

1 and 2 are longitudinal side views of one-quarter portions of respective disconnected and connected states of a fluid fitting showing an embodiment of the present invention.

Fig. 3 (a) is an enlarged longitudinal sectional side view of a quarter portion in which the cylindrical valve body of the fluid fitting shown in Figs. 1 and 2 is enlarged.

FIG. 3B is a cross-sectional view taken along the line A-A of FIG. 3A.

4 is a partially enlarged cross-sectional explanatory view of a lock mechanism of a conventional fluid joint.

* Explanation of symbols for main parts of the drawings

1 fluid fitting 11 socket

12: fluid passage hole 14: plug insertion portion

16: lockball 18: sleeve

18c: tapered surface 20: sealing

31: Plug 31a: End surface of plug

32: fluid passage hole 34: insertion portion into the socket

35: lock ball engaging groove 35a: groove wall

35c: Bottom

The present invention is used, for example, when extending, branching, or gathering a fluid pipe, or when making a mold by a cell mold or glass processing, and in particular, it is possible to easily change the burner crater exposed to high temperature. A fluid fitting for a gas burner.

Since the burner of a gas burner exposed to high temperature has a short lifespan and needs to be replaced frequently, improvement has been required. The present inventors have used a conventionally known method of fluid fittings in order to easily replace the burner craters, but it has been found that it is very difficult to obtain a sealing method that completely prevents gas leakage, especially when used at a high temperature. That is, the conventional fluid fitting has a fluid through hole, and also has a socket having an insertion portion of a plug communicating with the fluid through hole approximately concentrically, and a fluid passing hole and inserted into a socket substantially concentric with the fluid through hole. A plug having an insertable portion and a lock base for locking both the socket and the plug when the socket and the plug are connected, and the socket and the plug are connected through the lock mechanism by the mutual insertion of the socket and the plug at all times; The sealing is attached to the required part, and a method of sealing the end surface of the tip of the plug with a sealing is known, for example, a cross-sectional sealing method.

In addition, as shown in FIG. 4, the lock mechanism has a tapered hole 63 formed at several places in the same circumferential direction (only one of several places is shown in the drawing) of the main cylinder portion 62 of the socket 61. As shown in FIG. When the lock ball (65) inserted into the lock ball is pressed at right angles to the centripetal direction by the inner circumferential surface (68a) of the sleeve (67), the lock ball (65) is engaged with the lock ball engaging groove (73). Unnecessary detachment of the plug 71 is prevented.

In such conventional fluid fittings, the seal performance is not impaired when used at or near room temperature where the fitting material is not deformed, but is exposed to high temperatures such as, for example, cell mold casting or glass processing. When using this fluid joint as a burner crater, not only the joint material causes thermal expansion, but also the weakening and shrinkage of the seal member causes a decrease in the seal performance, and this problem has been solved in the future.

The present invention has been made in view of the above-described problems, and an object thereof is not to cause a decrease in sealing performance when used under high temperature or when the fluid temperature is high.

The present invention is a plug having a fluid through hole and having an insertion portion of a plug which communicates with the fluid through hole in a large concentric state, and a plug having a fluid through hole and an insertion portion into a socket which is approximately concentric with the fluid through hole. And a lock mechanism comprising a sleeve and a lock ball and a lock ball engaging groove for locking both of the socket and the plug when the socket and the plug are connected to each other, and through the lock mechanism by mutual insertion of the socket and the plug. In the fluid fitting port which can connect and isolate | separate, the taper surface which presses the lock ball of a lock mechanism in the centrifugal direction to the inner peripheral surface of the plug side opening end of the sleeve which comprises a part of the lock mechanism provided in the said socket side The wall of the groove near the socket of the lockball engaging groove installed in the plug The taper angle of the face is formed at an angle suitable for actively pushing the plug of the lock ball into the center of the socket by the tapered surface, and at the same time, the depth of the lock ball engagement groove is increased. The lock ball does not touch the bottom surface when the socket is connected to the plug, and the inside of the spiral socket is in contact with the end surface of the plug when the plug is inserted, and the thermal expansion coefficient is greater than that of the plug or the socket member when the temperature rises. It is set as the means for solving a subject as a structure which attached the metal sealing ring.

In the fluid joint according to the present invention, when the plug end is inserted into the plug insertion part of the socket, the end face of the plug comes into contact with the sealing ring installed at the insertion part of the plug with the socket, and on the other side, the lock ball is pressed in the centripetal direction. The force component acts on the lockball engaging groove of the plug so that the plug is pressed in the insertion direction, so that the cross-sectional sealing mechanism between the socket and the plug always maintains the sealing function stably. In addition, when the socket and the plug are thermally expanded due to the influence of fluid temperature when the socket and the plug are connected, the sealing is equally thermally expanded, so that the seal ring attached to the plug side by the force of the pressing force by the lock ball and The cross section of the tip of the plug is pressed against each other more strongly than when used at room temperature, further improving the sealing performance.

1 to 3 show one embodiment of the present invention, the fluid fitting 1 is a socket (for example, a crater body in manufacturing a cell mold mold, 11) and a combustible gas connected to a supply side of a combustible gas, for example. Burner crater is fixed to the plug 31.

The socket 11 has a fluid passage hole 12 in its axial center portion, and a male screw portion 13 for pipe connection at its rear part (the side opposite to the plug 31), and all of them (the plug 31 side). Has a plug insertion portion 14 which communicates concentrically with the fluid passage hole 12.

In the metal cylindrical portion 15 having the plug insertion portion 14, the receiving hole 17 of the lock ball 16 constituting a part of the lock mechanism in each of four places in the same circumferential direction has a small diameter in the centripetal direction and is centrifugal. It is formed as a taper hole (conical hole) having a larger diameter toward the direction.

In addition, on the outer circumferential side of the socket cylinder portion 15, a sleeve 18 constituting another portion of the lock mechanism is slidably disposed in the axial direction, and a coil spring engaging ring 15a provided on the outer circumference of the cylinder cylinder portion 15; The compression coil spring 19 is fitted between the partition side surfaces 18b of the inward flange portion 18a for locking the lock ball provided on the inner circumference of the sleeve 18. In addition, a chamfered surface 18c constituting the other side of the inwardly flanged portion 18a is formed, and is formed to gradually increase in diameter toward the plug 31 side, and presses the lock ball 16 in the centripetal direction. Angle (theta) which this taper surface 18c makes with the axial center line of the socket cylinder part 15 is set smaller than 45 degrees. Moreover, the cylindrical opening 24 of the sleeve 18 formed adjacent to this tapered surface 18c is formed in the magnitude | size which a part of lock ball 16 always faces. Inside the plug insertion portion 14 of the socket 11, when the plug 31 is connected to the socket 11, a metal sealing ring 20 pressed by the tip end surface 31a of the plug 31 is fitted. It is aligned. The seal ring 20 is made of a material having a larger thermal expansion coefficient (for example, A1 material) than the material of the socket 11 (for example, SS material), and has a tip end surface of the seal ring 20 and the plug 31. In order to increase the pressure contact strength with (31a), that is, to make the seal more rigid, the thermal expansion of the seal ring (20) is larger than that of the socket (11) at the time of temperature increase, so that the sealing ring (20) side has a tip end surface (31a) of the plug (31). It is configured to press firmly. A shape memory alloy (for example, Ti-Ni alloy) may be used for the material of the sealing ring 20. In this case, when the shape memory effect is used, the amount of deformation due to the shape-effect effect of the seal ring 20 is higher than the amount of thermal expansion of the socket 11 and the plug 31.

In addition, the wall surface portion 14a of the plug insertion portion 14 of the socket 11 is joined to the outer circumferential shape of the tip portion 31a of the plug 31 and is formed with a gentle taper.

The fluid passage hole 12 formed in communication with the plug insertion portion 14 at the shaft center portion of the socket cylinder portion 15 is provided with a traditional portion 21b in its entirety and a valve head portion 22 in the rear portion. The cylindrical valve body 21 is the outer peripheral part and the traditional part 21b of the middle barrel part 21a provided in the intermediate position of the traditional part 21b and the valve head part 22 as shown to FIG. 3 (a). The opening 21d provided in the shaft center portion of the shaft communicates with each other to form a Ute passage hole. The valve head portion 22 is formed of a metal seal material, and is pressed in the first direction in the right direction by a compression coil spring 23 fitted to the outer circumference of the middle barrel portion 21a, and the fluid passage hole 12 is made of porcelain metal. It is intended to be closed by the valve head portion 22.

The plug 31 has an axial fluid passage hole 32 in its axial center portion, and has an insertion portion 34 into the socket on the outer circumference of the whole (socket 11 side), and an insertion portion into this socket ( 34, the engaging groove 35 of the lock ball 16 is formed in the circumferential direction as is well known. The lock ball engaging groove 35 has a tapered surface 18c of the sleeve 18 in which the groove wall surface 35a of one side (close to the socket 11) is provided on the outer circumference of the socket 11. It is formed at an angle τ suitable for acting the component force of the pressing force acting on 16) in the insertion direction of the plug 31. It is preferable that this taper angle (tau), ie, the angle with respect to the axial center of a plug cylinder part, is larger than 45 (theta) or 45 (theta). In addition, the depth of the lock ball engagement groove 35 is set to the dimension which does not connect the lock ball 16 to the bottom face at the time of connection of the socket 11 and the plug 31. FIG.

The plug outer peripheral surface 37 of the plug into the socket is formed of a tapered surface suitable for the wall surface portion 14a formed in the plug insert 14 of the socket 11, and the socket 11 and the plug 31 are mutually separated. It is to ensure the insertion and centering of.

In connecting the socket 11 and the plug 31 of this fluid fitting 1, the sleeve 18 which is in FIG. 1 state is turned to the 1st left direction against the elastic repulsion force of the compression coil spring 19. FIG. Slightly sliding At this time, the lock ball 16 is movable in the lock ball release cylindrical opening 24 formed largely between the tapered surface 18c and the inner peripheral surface of the sleeve 18 and the nut-shaped portion 15b of the main cylinder portion 15. In this state, when the insertion portion 34 of the plug 31 into the socket is inserted with the plug insertion portion 14 of the socket 11, first, the tubular valve body is formed by the tip portion 31a of the plug 31. By pressing the traditional portion 21b of 21, the valve head portion 22 gradually opens the fluid passage hole 12. In this process, the tip portion 31a of the plug 31 advances toward the seal ring 20 installed in the socket 11 and contacts the seal ring 20 when the insertion state is completed. On the other side, the lock ball 16 of the socket 11 faces the lock ball engaging groove 35 of the plug 31 in the direction of the salvation core, and the lock ball 16 is connected to the engaging groove 35. Is inserted. When this state is reached, when the sleeve 18 is released, the sleeve 18 moves in the second direction to the right by the repulsive force of the compression coil spring 19, and the tapered surface of the sleeve 18 ( 18c), the lock ball 16 is pushed into the lock ball engaging groove 35 of the plug 31 in the centripetal direction, so that the repulsive force of the compression coil spring 19 is tapered surface 18c, lock ball 16 ) And the taper angle τ act as a force for pushing the plug 31 in the insertion direction (left direction) through the groove wall surface 35a having a larger value than 45θ, thereby achieving a fully connected state shown in FIG.

In this fully connected state, the lock ball engaging groove 35 of the plug 31 is set to a dimension such that the lock ball 16 does not contact the groove wall surface 35b and the groove bottom surface 35c. The pressing force in the insertion direction of the 31 is maintained by the repulsive force of the compression coil spring 19 so that the tip end surface 31a of the plug 31 strongly presses the seal ring 20, and the sealing performance by this metal seal is achieved. Always remains stable.

Next, when the temperature of the fluid fitting 1 rises due to the gas passing through the fluid passage holes 12 and 32, the thermal expansion of the sealing ring 20 of the socket 11 causes the socket 11 and the plug 31 to be increased. Since it is larger than the thermal expansion of the main body portion of the main body, the force of pressing the sealing ring 20 and the plug 31 of the socket 11 in the insertion direction and the sealing performance between the socket 11 and the plug 31 are further firmed. . When the socket 11 and the plug 31 in the connected state are separated, the sleeve 18 is slid to the left in the second degree so that the taper 18c of the sleeve 18 and the nut of the inner circumferential surface and the main cylinder portion 15 are removed. Since it can be easily moved toward the lock ball-shaped cylindrical opening 24 between the mold part 15b, it can be easily isolate | separated by the separating operation of the socket 11 and the plug 31. As shown in FIG.

The fluid fitting according to the present invention has a tapered surface for pressing the lock ball of the lock mechanism in the centripetal direction toward the plug side on the inner circumferential surface of the plug side opening end of the sleeve constituting a part of the lock mechanism provided in the socket. And a taper angle on the groove wall surface of the socket side of the lock ball engaging groove formed in the plug, and a component of the lock ball pressing force pressed in the centripetal direction by the tapered surface to advance the plug into the socket in the world. At the same time, the depth of the lock ball engagement groove is set to a dimension such that the lock ball does not contact the bottom of the socket when the socket and plug are connected to each other. It comes in contact with the end face of the tip and attaches a metal sealing ring with a higher thermal expansion coefficient than the main part of the plug and socket when the temperature rises. Because the last name, By using such a fluid yieumgu simplify the cooking zone of the burner it is possible to quickly exchange.

Claims (1)

A socket 11 having a fluid passage hole 12 and having an insertion portion 14 of a plug 31 which communicates substantially concentrically with the fluid passage hole 12, and a fluid passage hole 32, The plug 31 having the insertion portion 34 into the socket 11 which is substantially concentric with the fluid passage hole 32, and both the socket 11 and the plug 31 are engaged in a locked state. And a lock mechanism composed of a sleeve 18 and a lock ball 16 and the lock ball engaging groove 35, through the lock mechanism by mutual insertion of the socket 11 and the plug 31. In the fluid fitting 1 which made it possible to isolate | separate both, the lock ball 16 of the lock mechanism is formed in the inner peripheral surface of the plug side opening end of the sleeve 18 which comprises a part of the said lock mechanism provided in the said socket 11. The tapered surface 18c pressing in the centripetal direction is formed so that the diameter gradually increases toward the plug side. Of the pressing force of the lock ball which presses the taper angle (tau) of the groove wall surface 35a of the socket side of the lock ball engaging groove 35 formed in the main plug 31 in the centripetal direction by the taper surface 18c. The component force forms the plug 31 at an angle suitable for advancing the plug 31 in the inward direction of the socket 11 and at the same time the depth of the lock ball engaging groove is connected to the socket 11 and the plug 31 at the time of connection. (16) is set to a dimension that does not contact the bottom surface, the inside of the socket 11 is in contact with the end surface of the tip of the plug when the plug 31 is inserted, and the plug 31 and the socket ( A fluid fitting, characterized in that a metal seal ring (20) having a greater thermal expansion coefficient than that of the cylinder portion (15) is attached.