KR20050003900A - auto-change valve apparatus - Google Patents

Abstract

PURPOSE: An automatic switch valve is provided to remove a pipe line work by connecting a pressure chamber of a switch body and a valve installation space by a fluid pressure transmitting passage and to accelerate response properties by supplying directly fluid pressure from a three-way valve to the pressure chamber in changing a supply line. CONSTITUTION: An automatic switch valve comprises a switch body(10) composed of a delivery line(18) for the other direction installed between two-system supply lines and a valve disposed between the supply line and the delivery line, and connected and mounted with a valve rotating shaft(12) having a switch rotor for rotating the valve; a crank mechanism(20) fixed under the switch body, linked and installed with a crank rod(21) through a switch member arranged at the switch rotor, and coupled and installed with a piston(24) elastically disposed to the crank rod by a first spring(25) to check a switch state according to a movement position of the piston; a diaphragm mechanism(30) fastened on the upper part of the switch body to lock or release the switch rotor; a reset mechanism(40) settled in the front side of the switch body to rotate manually the valve rotating shaft and the switch member; a valve installation space(11d) formed at the lower part of the switch body and installed with a three-way valve(11); a hole integrated at both ends of the valve installation space to connect the supply lines; and a fluid pressure transmitting passage(19) connected from a pressure chamber(15) of the switch body installed with the diaphragm mechanism to the valve installation space.

Description

Auto-change valve apparatus

The present invention relates to an automatic switching valve device in which the fluid supply line of two systems is automatically switched to the other fluid supply line when the remaining fluid is below a predetermined pressure, and continuous fluid supply is made to the consumption side.

Normally, LPG bombs are arranged and connected in two systems, including preliminary standby, so that LPG can be continuously supplied to vapor risers or gas cookers of LPG engines. When the remaining amount of the cylinder is less than the predetermined pressure, the automatic switching valve device is provided to automatically turn to the pre-waiting Elpzi cylinder as the fluid pressure decreases.

The automatic switching valve device related to this technology is disclosed in Japanese Patent Laid-Open No. 2000-39080, which has a supply line of LPG consisting of two lines, A line and B line, and C line, which is a delivery line. LPG is sent to the vaporizer and the like via a switching body, a crank mechanism fixed to the lower part of the switching body, a diaphragm mechanism fixed to the upper part of the switching body, a reset mechanism fixed to the front of the switching body, and the switching unit. It consists of a valve box which is fixed to the back of the main body and has two supply lines and a discharge line.

In the automatic switching valve device configured as described above, if the remaining amount of Elpji in the supply line A or B line is sufficient, the pressure inside the pressure chamber of the switching body and the force of the second spring are balanced, and the stem is located above, so that the plunger is located outside of the switching rotor. The rotor is kept in a locked state. On the contrary, when the internal pressure of the pressure chamber is lower than the predetermined pressure due to the decrease in the amount of remaining elbow, the pressure is pushed down the stem by the spring force of the diaphragm mechanism. Since the plunger is embedded in the changeover rotor, it is possible to unlock the changeover rotor. In this state, the unlocking switching rotor was rotated by the operation of the crank mechanism and the switching member, and as a result, the three-way valve was able to switch to a supply line in a different direction as the valve rotation shaft was rotated.

However, in the automatic switching valve device as described above, the fluid pressure transfer line for transferring the fluid pressure applied to the delivery line to the pressure chamber of the switching body must be essentially connected to the pressure chamber and the delivery line of the switching body.

Therefore, the fluid pressure transmission line has to be provided to the outside of the automatic switching valve device from the pressure chamber and the delivery line of the switching body due to its structural characteristics, and in the cold cold region because the fluid pressure transmission line is exposed to the outside Freezing prevention was required and eventually there was a problem to protect the entire automatic switching valve device to cover the housing.

In addition, since the switching body, the crank mechanism, the diaphragm mechanism, the reset mechanism, and the valve box are all separately provided, there are too many components, which makes the manufacturing difficult, and the processing cost is increased. There was a problem that the function can be secured as well as confidentiality.

An object of the present invention has been researched and developed in order to solve the above-mentioned conventional problems, to provide a valve box in which the three-way valve is installed in the switching body integrally to reduce the components and thereby simplify the components as well as assembly In addition, by connecting the pressure chamber of the switching body and the valve installation space with the fluid pressure transmission passage, the freezing prevention and responsiveness in the cold region are faster, and there is no need for a separate piping line. The present invention provides an automatic switching valve device.

1 is a front view showing an automatic switching valve device according to the present invention,

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

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

Figure 4 is an exploded perspective view showing the relationship between the switching rotor, the switching member and the reset rotor of the present invention,

5a to 5c are cross-sectional views showing a state in which the switching rotor of the present invention is released from the locked state and then locked again;

6 is a cross-sectional view showing the relationship with the diaphragm mechanism for the switching rotor of the present invention.

<Explanation of symbols for main parts of drawing>

10: switching body 11: 3-way valve

11d: valve installation space 12: valve rotation shaft

13: switching rotor 14: switching member

15: pressure chamber 19: fluid transfer passage

20: crank mechanism 21: crank rod

23: first cylinder 24: piston

30: diaphragm mechanism 31: diaphragm

33: stem 34: disc

35: screw 36: cap

37: 3rd spring 38: 2nd cylinder

39: manual change knob 40: reset mechanism

41: reset rotor 42: handle

43,44: Reset Stone

The present invention for achieving the object as described above, the discharge line is provided in the other direction between the two supply lines and the valve is installed between the supply line and the discharge line and has a switching rotor to rotate the valve A switch body having a valve rotating shaft connected thereto, fixed to a lower part of the switch body, and a crank rod is connected and installed by a switching member installed in the switch rotor, and a piston elastically installed with a first spring is connected to the crank rod to move the piston. Crank mechanism to confirm that the switch according to the position, the diaphragm mechanism is fixed to the upper portion of the switching body, the locking rotor to lock and release, fixed to the front of the switching body and the valve rotating shaft and the switching member installed therein manually In the automatic switching valve device comprising a reset mechanism to make, A valve installation space is formed at the bottom of which a three-way valve is installed, and holes for connecting the supply line are integrally formed at both ends of the valve installation space, and in the valve installation space in the pressure chamber of the switching body in which the diaphragm mechanism is mounted. It characterized in that the fluid pressure transmission passage is connected to.

The diaphragm mechanism is provided with a manual switching means for enabling manual switching by one push operation, if necessary, the manual switching means includes a diaphragm, a cap fastened to the diaphragm including a third spring, and the diaphragm. A third spring extending toward the switching rotor in the switching body and extending outwardly through the cap, the second cylinder and the screw, and installed in the cap so that the stem is always released from the switching rotor. Characterized in that it is provided.

According to the present invention, by providing a valve box accommodating a three-way valve integrally with the switching body, the components can be simplified and improved in assembly, and the fluid pressure transfer passage is directly from the pressure chamber of the switching body to the valve installation space. By connecting, there is no need for a separate pipe line, and thus the piping work is not necessary and the response is faster.

In addition, when the manual switching knob is pressed on the diaphragm mechanism, only the stem is moved toward the switching rotor so that the plunger is inserted into the switching rotor, thereby enabling the unlocking of the switching rotor with an extremely simple structure.

Hereinafter, the automatic switching valve device of the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 is a view showing for explaining the automatic switching valve device of the preferred LPG according to the present invention.

As shown in the figure, the switching body 10 is provided with LPG supply lines 17a and 17b having two lines, A line and B line, and vaporizers are supplied from the supply lines 17a and 17b via the C line. A dispensing line 18 for dispensing LPG is provided on the back. The crank mechanism 20 is fixed to the lower portion of the switching body 10, the diaphragm mechanism 30 is fixed to the upper portion of the switching body 10 and the reset mechanism 40 in front of the switching body 10 Is fixed.

As shown in Fig. 2, the switching main body 10 has a valve installation space 11d communicating with both supply lines 17a and 17b on one side thereof, and a supply line at both ends of the valve installation space 11d. A hole 11e concentric with the valve installation space 11d is formed while communicating with 17a and 17b, and a ball-type three-way valve for switching between A and B lines, which are the supply lines 17a and 17b ( 11) is provided, the end of the valve rotation shaft 12 is connected to the three-way valve 11, the switching rotor 13 is provided in the middle of the valve rotation shaft 12. The three-way valve 11 is a valve body (11b, 11c) perforated to communicate with the supply line (17a, 17b), and the valve ball (11a) between the valve body (11b, 11c) rotatable It is installed.

The switching rotor 13 is configured to switch by rotating the three-way valve 11 installed in the valve installation space (11d) of the switching body 10 by a predetermined angle (90 °) to the valve rotation shaft 12, The switching rotor 13 is formed in a fan shape having a corner portion 13a as shown in FIG. 4, and the switching protrusion piece 13b protrudes in the axial direction on the arc portion thereof.

In addition, the switching body 10 is formed with a concave pressure chamber 15 at the position where the diaphragm 31 of the diaphragm mechanism 30 is mounted, and from the pressure chamber 15 to the valve installation space 11d. The fluid pressure transfer passage 19 is connected.

2 and 4, the U-shaped switching member 14 is rotatably installed on the valve rotation shaft 12, and the switching member 14 includes two parallel gripping portions 14a and 14b. The crank rod 21 which is formed in the depression shape and which comprises the crank mechanism 20 between the said clamping part 14a, 14b is eccentrically connected by the crank pin 22. As shown in FIG.

As shown in FIG. 2, the crank mechanism 20 is provided with a hollow piston 24 in the first cylinder 23 and embedded in the hollow of the piston 24 to push up the piston 24 upwards. The one spring 25 is elastically built, and the ball tip 21a of the crank rod 21 is accommodated in the conical recess 24a above the piston 24.

As shown in FIGS. 5A to 5C, the linear motion of the piston 24 elastically supported by the first spring 25 is switched through the crank rod 21. 10) is converted into rotational motion by the switching member 14, and the switching projection piece 13b of the switching rotor 13 is in contact with the clamping portion 14a of the switching member 14, The rotational movement rotates the switching projection piece 13b, thereby operating the three-way valve 11 connected to the end of the valve rotation shaft 12.

On the other hand, the diaphragm 30 is provided with a diaphragm 31 acting as a pressure chamber 15 on the concave portion of the upper part of the switching body 10 at a position in contact with the second cylinder 38, as shown in FIG. The second spring 32 is installed in the second cylinder 38 so that the upper portion of the diaphragm 31 is balanced with the pressure applied to the pressure chamber 15, and the second spring 38 is provided at the end of the second cylinder 38. (32) The screw 35 for adjusting the elasticity of the second spring 32 by pushing the upper plate 34 is fastened.

A cap 36 including a third spring 37 is fastened to the diaphragm 31, and extends toward the switching rotor 13 in the switching body 10, and also includes a cap 36 and a second cylinder ( 38) and a stem 33 extending outward through the screw 35 is provided. The third spring 37 pushes up the locking ring 50 of the stem 33 located inside the cap 36 to impart a force to allow the stem 33 to be separated from the switching rotor 13 at all times. At the upper end of the stem 33, a manual switching knob 39 is provided to facilitate pressing the stem 33 in the axial direction.

And, the diaphragm mechanism 30 is for releasing the lock of the switching rotor 13 in the switching body 10, the outer surface of the switching rotor 13 as shown in Figure 6, the three-way valve 11 In the normal state, two plungers (13c, 13d) protruding to the outside in the normal state is installed and locked, the diaphragm mechanism as the pressure chamber 15 of the switching body 10 is lowered The stem 33 of 30 is released by pressing the plungers 13c and 13d into the switching rotor 13.

Therefore, if the remaining amount of LPG in the supply line is sufficient, when the internal pressure of the pressure chamber 15 and the elasticity of the second spring 32 are balanced, the stem 33 is located at the top so that the plunger 13c is switched to the rotor ( 13) the rotation of the switching rotor 13 is kept locked because it protrudes outward.

On the contrary, when the internal pressure of the pressure chamber 15 becomes lower than the predetermined pressure according to the decrease of the remaining amount of LPG, the stem 33 is pressed by the force of the second spring 32 and the plunger 13c is switched to the pressure. Since it is inserted into (13), it becomes possible to unlock the switching rotor (13).

And if the manual switching is required arbitrarily, even if the residual amount of Elpji in the supply line is sufficient and the pressure of the gas is higher than the predetermined pressure, pressing the manual switching knob 39 is integral with the manual switching knob 39 of the diaphragm mechanism 30 Only the stem 33 is moved toward the changeover rotor 13 and the plunger 13c is inserted into the changeover rotor 13 by the stem 33 so that the changeover rotor 13 can be unlocked. Done.

Thus, the lock rotor 13 is rotated by the action of the crank mechanism 20 and the switching member 14, the valve rotation shaft 12 is rotated by this rotation, so the three-way valve 11 is It will automatically switch to the feed line in the other direction.

Here, after the supply lines 17a and 17b are switched, the internal pressure of the pressure chamber 15 is changed to the three-way valve (11d) of the valve installation space 11d in a state where the stem 33 is pressed by the elasticity of the second spring 32. As it is sent to the delivery line 18 through 11) is immediately supplied to the valve installation space (11d), the fluid pressure transfer passage 19 and the pressure chamber (15). As the elasticity of the second spring 32 is balanced according to the internal pressure of the pressure chamber 15, the stem 33 moves upward and eventually rotates to move the plunger 13d of the switching rotor 13 to the stem ( 33 is moved along and protrudes to the outside of the switching rotor 13, so that the rotation of the switching rotor 13 is locked.

As described above, when the manual switching is also removed, the stem 33 is in its original position due to the elasticity of the third spring 37 installed inside the cap 36 when the force applied to the manual switching knob 39 is removed. As the stem 33 is returned, the plunger 13d of the switching rotor 13 is moved and protrudes out of the switching rotor 13 so that the rotation of the switching rotor 13 is locked. .

However, while the switching rotor 13 rotates to the position where the switching rotor 13 rotates and the plunger 13d positioned in the other direction abuts the stem 33, the other plunger 13d of the switching rotor 13 Since it does not protrude to the outside, the switching rotor 13 cannot be locked. That is, the switching rotor 13 may rotate more than necessary during the switching operation, so that the switching rotor 13 stops at the position where the switching rotor 13 is rotated by 90 ° immediately after the switching to prevent the switching rotor 13. The stopper 16 which supports each part 13a of () is provided (refer FIG. 6).

Therefore, since the stop position of the switching rotor 13 is corresponded to the top dead center of the crank by the stopper 16, the stop position of the switching rotor 13 substantially coincides with the locking position of the switching rotor 13 by the plungers 13c and 13d.

After the supply line is switched by the method as described above, the reset mechanism 40 replaces the LPI cylinder connected to the original supply line with a new one, and then the switching of the three-way valve 11 again, that is, the switching rotor. The switching member 14 and the crank mechanism 20 should be reset so that the reverse rotation of (13) is possible.

As shown in Fig. 4, the reset mechanism 40 is provided with a reset rotor 41 which is rotatable about the valve rotation shaft 12, and manually resets the reset rotor 41 to one end of the reset rotor 41. The handle 42 for rotating the shaft in the radial direction of the reset rotor 41 is provided, and on the other side of the reset rotor 41, one of the switching members 14 is rotated 90 degrees with respect to the handle 42, respectively. The pair of reset pieces 43 and 44 which can contact the clamping portion 14b of the protrusion protrude in the axial direction of the reset rotor 41. The reset stone pieces 43 and 44 should not interfere with the switching member piece 13b of the switching rotor 13.

Therefore, in the reset operation of the reset mechanism 40, first, the position where the switching member 14 is in contact with one of the reset protrusion pieces 43 in the course of going from the normal operation (see FIG. 5A) state before the switching to the switching operation. Rotate to and stop. When the handle 42 is continuously turned from this state, the reset stone piece 43 in one direction is rotated in the opposite direction different from when the switching member 14 is switched, and the handle 42 is finally rotated 180 °. The reset is completed at the point of time. As described above, the switching rotor 13 is turned on at the time of the next time the switching is reversed by reversing the position where the switching member 14 contacts the switching projection piece 13b of the switching rotor 13 by the reset mechanism 40. Since it rotates in a different direction from, it is possible to switch the connection line of the three-way valve (11). Thereafter, the above-described operation is repeated to perform the switching operation and the reset operation.

In addition, the crank mechanism 20 is provided with a means for confirming that the supply line is switched, the means is attached to at least one or more colors or figures of the mark 28 above and below the piston 24, The first cylinder 23 is provided with a window 29 for confirming that the switching operation and the reset operation have been performed through the colors and figures of the mark 28 (see FIGS. 1 and 2).

As described above, the automatic switching valve device of the present invention is useful to provide an integrated valve box in which the three-way valve is installed in the switching body so as to reduce component parts and improve assembly performance by simplicity.

In addition, the present invention connects the pressure chamber of the switching body and the valve installation space to each other by the fluid pressure transmission path, so that no separate piping line is required, and thus no piping work is required, and pressure is directly supplied from the three-way valve when the supply line is switched. In fact, because the fluid pressure is supplied to the responsiveness, it is useful to prevent freezing in cold cold regions.

And, by pressing the manual switching means, the manual switching knob for arbitrarily switching to the diaphragm mechanism, only the stem is moved toward the switching rotor so that the plunger can be inserted into the switching rotor to unlock the switching rotor with an extremely simple structure. It can be useful.

Claims (2)

A discharge line 18 is provided between the two supply lines 17a and 17b in the other direction, and a valve is installed between the supply lines 17a and 17b and the discharge line 18 to rotate the valve. A crank rod (10) is connected to a switching main body (10) provided with a valve rotating shaft (12) having a switching rotor (13) and fixed to a lower portion of the switching main body (10) and provided through a switching member (14) installed at the switching rotor (13). Crank mechanism 20 that can be confirmed that the 21 is connected and the piston 24, which is elastically installed with the first spring 25 is connected to the crank rod 21 is switched according to the movement position of the piston 24. , A diaphragm mechanism 30 fixed to an upper portion of the switching body 10 and locking and releasing the switching rotor 13, fixed to a front side of the switching body 10, and switching between the valve rotation shaft 12 and the valve body 12. Automatic switching valve head including a reset mechanism 40 for manually rotating the member 14 In Chi, A valve installation space 11d is formed in the lower portion of the switching body 10 to install the three-way valve 11, and holes 11e for connecting the supply lines are integrally formed at both ends of the valve installation space 11d. It is formed, the automatic switching valve device characterized in that the fluid pressure transfer passage 19 is connected from the pressure chamber 15 of the switching body 10 to which the diaphragm mechanism 30 is mounted to the valve installation space 11d. . The diaphragm 31 and a cap fastened to the diaphragm 30 by including a diaphragm 31 and a third spring 37 on the diaphragm 31 so as to be manually switched by one pressing operation. 36 and a stem extending from the diaphragm 31 toward the switching rotor 13 in the switching body 10 and penetrating the cap 36, the second cylinder 38 and the screw 35 to the outside. And a third spring (37) installed inside the cap (36), the third spring (37) being provided such that a force is released from the switching rotor (13) at all times. .