Gas valve with child lock structure

Abstract

The present invention relates to a gas valve with a child lock structure, comprising a valve seat, a valve core, a knob rod, an ignition micro switch, and a valve cover fixed on the valve seat, wherein the upper end of the knob rod passes through the valve cover; the feature is that the portion of the knob rod located outside the valve cover has an arc-shaped boss and a clearance plane, the outer peripheral surface of the boss has a first radial distance from the central axis of the knob rod greater than the second radial distance from the clearance plane to the central axis of the knob rod, and the trigger component of the ignition micro switch can be triggered by the boss. The knob rod has an arc-shaped boss and a clearance plane, and after the knob rod is pressed down at the original position, the trigger component of the ignition micro switch moves to the clearance plane, and the trigger component of the ignition micro switch is not triggered. In this way, when maintenance personnel are repairing, even if someone accidentally presses the knob rod at the original position, the ignition switch will not be triggered, thereby avoiding electric shock. After the knob rod is pressed down at the original position and deflected by an angle, the trigger component of the ignition micro switch is triggered by the boss and ignites, which will not affect normal ignition.

Description

Technical Field

[0001] The invention relates to a gas valve, in particular to a gas valve with a child lock structure. Background Art

[0002] In the existing gas valve, when the valve stem is pressed down at the zero-degree position (original state), the ignition switch will be triggered. This situation will cause the maintenance personnel to accidentally touch the push-down knob during maintenance, which will trigger the ignition switch to ignite. When the ignition switch ignites, a certain current will be generated, and the maintenance personnel will feel uncomfortable as if they were electrocuted. For example, the Chinese utility model patent "Gas valve capable of controlling two fire bars and having a long-lasting flame function" with patent number ZL201821212627.3 (publication number CN208831808U) discloses such a gas valve that triggers the ignition switch by moving the valve stem down at the zero-degree position (original state). Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a gas valve with a child lock structure which has a simple and reasonable structure and will not trigger the ignition switch when the valve stem is pressed down at the zero degree position (original state) in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a gas valve with a child lock structure, comprising a valve seat, a valve core, a knob rod, an ignition micro switch, and a valve cover fixed on the valve seat, wherein the valve core is installed in the valve seat, the lower end of the knob rod cooperates with the valve core to drive the valve core to rotate, the upper end of the knob rod passes through the valve cover, and the knob rod is kept in an upward movement trend by the action of a spring; the characteristic is that the portion of the knob rod located outside the valve cover has an arc-shaped boss and a yield plane, and the outer peripheral surface of the boss is 1.5 meters away from the center axis of the knob rod. The first radial distance of the ignition microswitch is greater than the second radial distance of the yield plane from the center axis of the knob rod, and the trigger component of the ignition microswitch can be triggered by the boss; when the knob rod is in the original position, the trigger component of the ignition microswitch is located below the boss; after the knob rod is pressed down at the original position, the trigger component of the ignition microswitch is opposite to the yield plane, so that the trigger component of the ignition microswitch is not triggered; after the knob rod is pressed down at the original position and deflected by an angle, the trigger component of the ignition microswitch is triggered by the boss and ignites.

[0005] Preferably, a driving column with a side protrusion for cooperating with the opening groove on the valve core is fixed on the above-mentioned knob rod, and a limiting groove cooperating with the driving column is opened on the bottom surface of the valve cover. When the knob rod is in the original position, the driving column is stuck in the limiting groove.

[0006] As an improvement, the valve cover is provided with a through hole for the knob rod to pass through, and the top surface of the valve cover has an annular wall extending upward around the through hole, and the annular wall forms a guide sleeve that cooperates with the knob rod, and the guide sleeve is provided with a window, and the trigger component of the ignition micro switch extends into the window and can cooperate with the boss. The guide sleeve guides the knob rod, and the setting of the window serves as an installation indicator for the ignition micro switch, ensuring the accuracy of the installation of the ignition micro switch.

[0007] Preferably, the ignition micro switch is fixed on the valve cover. Of course, it can also be fixed on other components. As a further improvement, the first top surface of the trigger component of the ignition micro switch is an inclined surface, and the first bottom surface of the boss is a plane. The cooperation of the inclined surface and the plane facilitates the trigger component to slide from the bottom of the boss to the side of the boss. No additional pushing component is required.

[0008] Preferably, there is a process fillet transition between the bottom surface and the side surface of the boss, which is more conducive to the trigger component passing over the bottom surface of the boss.

[0009] A further improvement includes a detection micro switch, when the knob rod is in the original position and not pressed down, the boss touches the detection trigger component of the detection micro switch, and the detection micro switch is not turned on; after the knob rod is pressed down in the original position, the boss leaves the detection trigger component of the detection micro switch, and the detection micro switch is reset and turned on. The detection micro switch plays an additional auxiliary role, for example, it is used to link the gas stove and the range hood.

[0010] The detection micro switch is fixed on the valve cover. The second bottom surface of the detection trigger component of the detection micro switch is an inclined surface, and the second top surface of the boss is a plane. There is a process fillet transition between the second top surface and the side surface of the boss.

[0011] A further improvement includes a detection micro switch, wherein the portion of the knob rod outside the valve cover also has an arc-shaped auxiliary boss and an auxiliary yielding plane, the auxiliary boss is located above the yielding plane and the boss, the third radial distance between the outer circumference of the auxiliary boss and the central axis of the knob rod is greater than the fourth radial distance between the auxiliary yielding plane and the central axis of the knob rod, and the detection trigger component of the detection micro switch can be triggered by the auxiliary boss; when the knob rod is in the original position state and the original position is pressed down, the detection trigger component of the detection micro switch is opposite to the auxiliary yielding plane, so that the detection trigger component of the detection micro switch is not triggered; after the knob rod is pressed down in the original position and deflected by an angle, the detection trigger component of the detection micro switch is triggered by the auxiliary boss and turned on. The detection micro switch plays an additional auxiliary role, such as being used to link a gas stove and a range hood. The detection switch setting method has the following beneficial effects: when the knob rod is pressed down in the original position, the detection micro switch is not triggered, thereby avoiding accidentally turning on the range hood by accidentally touching the detection micro switch during the process of cleaning the gas stove.

[0012] Compared with the prior art, the advantages of the present invention are: the knob rod has an arc-shaped boss and a clearance plane. After the knob rod is pressed down at the original position, the trigger component of the ignition micro switch moves to the clearance plane, and the trigger component of the ignition micro switch is not triggered. Even if someone accidentally presses the knob rod at the original position, the ignition switch will not be triggered, avoiding electric shock. After the knob rod is pressed down at the original position and deflected by an angle, the trigger component of the ignition micro switch is triggered by the boss and ignites, which will not affect normal ignition. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention;

[0014] Figure 2 A cross-sectional view of a first embodiment of the present invention;

[0015] Figure 3 The three-dimensional structure of the first embodiment of the present invention after removing the valve cover part is shown in FIG. Figure 1 (original position);

[0016] Figure 4 The three-dimensional structure of the first embodiment of the present invention after removing the valve cover part is shown in FIG. Figure 2 (original position);

[0017] Figure 5 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention after the valve cover portion is removed (original position and pressed down);

[0018] Figure 6This is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention after the valve cover portion is removed (the original position is pressed down and deflected by an angle);

[0019] Figure 7 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention after the valve cover portion is removed (in a state of being moved upward a certain distance after being deflected by an angle);

[0020] Figure 8 The three-dimensional structure of the valve cover in the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0021] Fig. 9 The three-dimensional structure of the valve cover in the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0022] Fig.10 It is a schematic diagram of the three-dimensional structure of the knob rod in the first embodiment of the present invention;

[0023] Fig.11 It is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0024] Fig.12 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention after the valve cover portion is removed (original position);

[0025] Fig.13 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention after the valve cover part is removed (original position and pressed down);

[0026] Fig.14 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention after the valve cover portion is removed (the original position is pressed down and deflected by an angle);

[0027] Fig.15 This is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention after the valve cover part is removed (the state of moving up a certain distance after being deflected by an angle);

[0028] Fig.16 The three-dimensional structure of the knob rod in the second embodiment of the present invention is shown in FIG. Figure 1 ;

[0029] Fig.17 The three-dimensional structure of the knob rod in the first embodiment of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings.

[0031] like Figures 1 to 10 FIG. 1 is a first embodiment of the present invention.

[0032] A gas valve with a child lock structure comprises a valve seat 1, a valve core 2, a knob rod 3, an ignition micro switch 5, and a valve cover 6 fixed on the valve seat 1. The valve core 2 is installed in the valve seat 1, the lower end of the knob rod 3 cooperates with the valve core 2 to drive the valve core 2 to rotate, the upper end of the knob rod 3 passes through the valve cover 6, and the knob rod 3 is maintained in an upward movement trend by the action of a spring 4.

[0033] The portion of the knob rod 3 located outside the valve cover 6 has an arc-shaped boss 31 and a clearance plane 32. The first radial distance D1 between the outer circumference of the boss 31 and the center axis X of the knob rod is greater than the second radial distance D2 between the clearance plane 32 and the center axis X of the knob rod. The ignition micro switch 5 is a normally open switch, and the trigger component 51 of the ignition micro switch 5 can be triggered by the boss 31. The knob rod 3 is in the original position, such as Figure 3 , 4 As shown, the trigger component 51 of the ignition micro switch 5 is located below the boss 31; after the knob rod 3 is pressed down in the original position, as shown in FIG. Figure 5 As shown, the trigger component 51 of the ignition micro switch 5 is opposite to the yield plane 32, so that the trigger component 51 of the ignition micro switch 5 is not triggered; after the knob rod 3 is pressed down at the original position and deflected by an angle, as shown in FIG. Figure 6 As shown, the trigger component 51 of the ignition micro switch 5 is triggered by the boss 31 to ignite. Figure 7 As shown, after the knob rod 3 is deflected by an angle and moved upward a little distance, the trigger component 51 of the ignition micro switch 5 is located below the boss 31 and is not triggered.

[0034] A driving column 33 with a side protrusion for cooperating with the opening groove 21 on the valve core 2 is fixed on the knob rod 3. A limiting groove 61 cooperating with the driving column 33 is opened on the bottom surface of the valve cover 6. When the knob rod 3 is in the original position, the driving column 33 is stuck in the limiting groove 61.

[0035] The valve cover 6 is provided with a through hole 62 for the knob rod 3 to pass through, and the top surface of the valve cover 6 is provided with an annular wall 63 extending upward around the through hole, and the annular wall 63 forms a guide sleeve that cooperates with the knob rod 3, and the guide sleeve is provided with a window 631, and the trigger component 51 of the ignition micro switch 5 extends into the window 631 and can cooperate with the boss 31. The ignition micro switch 5 is fixed on the valve cover. The first top surface 511 of the trigger component 51 of the ignition micro switch 5 is an inclined surface, and the first bottom surface 311 of the boss 31 is a plane. There is a process fillet transition between the first bottom surface 311 and the side surface 312 of the boss 31.

[0036] It also includes a detection micro switch 7, which is a normally closed switch. When the knob rod 3 is in the original position and not pressed down, the boss 31 touches the detection trigger component 71 of the detection micro switch 7, and the detection micro switch 7 is not turned on; after the knob rod 3 is pressed down in the original position, the boss 31 leaves the detection trigger component 71 of the detection micro switch 7, and the detection micro switch 7 is reset and turned on. Figure 7 As shown, after the knob rod 3 deflects an angle and moves up a little distance, the driving column 33 can only move up a little distance under the blocking effect of the inner top surface of the valve cover 6. At this time, the boss 31 is still in a state of leaving the detection trigger component 71 that touches the detection micro switch 7, and the detection micro switch 7 is reset and turned on, and the detection micro switch 7 is fixed on the valve cover 6. The second bottom surface 711 of the detection trigger component 71 of the detection micro switch 7 is an inclined surface, and the second top surface 313 of the boss 31 is a plane. There is a process fillet transition between the second top surface 313 of the boss 31 and the side surface 312.

[0037] The clearance plane 32 is machined by milling.

[0038] like Figures 11 to 17 FIG. 2 is a diagram showing a second embodiment of the present invention.

[0039] Compared with the first embodiment, the setting method of the detection micro switch 7 in this embodiment is different: the detection micro switch 7 in this embodiment is a normally open switch, and the part of the knob rod 3 located outside the valve cover 6 also has an arc-shaped auxiliary boss 34 and an auxiliary yield plane 35, the auxiliary boss 34 is located above the yield plane 32 and the boss 31, the third radial distance D3 between the outer peripheral surface of the auxiliary boss 34 and the central axis X of the knob rod is greater than the fourth radial distance D4 between the auxiliary yield plane 35 and the central axis X of the knob rod, and the detection trigger component 71 of the detection micro switch 7 can be triggered by the auxiliary boss 34.

[0040] The knob rod 3 is in the original position and in the original position pressed state, such as Figures 11 to 13 As shown, the detection triggering components 71 of the detection micro switch 7 are all opposite to the auxiliary yielding plane 35, so that the detection triggering components 71 of the detection micro switch 7 are not triggered; after the knob rod 3 is pressed down at the original position and deflected by an angle, as shown in FIG. Fig.14 As shown, the detection trigger component 71 of the detection micro switch 7 is triggered by the auxiliary boss 34 and turned on; after the knob rod 3 deflects an angle and moves up a little distance, as shown in FIG. Fig.15 As shown, the detection trigger component 71 of the detection micro switch 7 is still triggered by the auxiliary boss 34 and turned on.

[0041] The auxiliary clearance plane 35 is processed by milling.

Claims

1. A gas valve with a child lock structure, comprising a valve seat (1), a valve core (2), a knob rod (3), an ignition micro switch (5), and a valve cover (6) fixed on the valve seat (1), wherein the valve core (2) is installed in the valve seat (1), the lower end of the knob rod (3) cooperates with the valve core (2) to drive the valve core (2) to rotate, the upper end of the knob rod (3) passes through the valve cover (6), and the knob rod (3) is kept in an upward movement trend by a spring (4); characterized in that: The portion of the knob rod (3) located outside the valve cover (6) has an arc-shaped boss (31) and a clearance plane (32); a first radial distance (D1) between the outer peripheral surface of the boss (31) and the central axis (X) of the knob rod is greater than a second radial distance (D2) between the clearance plane (32) and the central axis (X) of the knob rod; the trigger component (51) of the ignition micro switch (5) can be triggered by the boss (31); when the knob rod (3) is in the original position, the The trigger component (51) of the ignition micro switch (5) is located below the boss (31); after the knob rod (3) is pressed down at the original position, the trigger component (51) of the ignition micro switch (5) is opposite to the clearance plane (32), so that the trigger component (51) of the ignition micro switch (5) is not triggered; after the knob rod (3) is pressed down at the original position and deflected by an angle, the trigger component (51) of the ignition micro switch (5) is triggered by the boss (31) to ignite; The knob rod (3) is fixed with a side convex driving column (33) for cooperating with the opening groove (21) on the valve core (2); the bottom surface of the valve cover (6) is provided with a limiting groove (61) for cooperating with the driving column (33); when the knob rod (3) is in the original position, the driving column (33) is inserted into the limiting groove (61); The valve cover (6) is provided with a through hole (62) for the knob rod (3) to pass through, and the top surface of the valve cover (6) is provided with an annular wall (63) extending upward around the through hole, the annular wall (63) forming a guide sleeve that cooperates with the knob rod (3), and the guide sleeve is provided with a window (631), and the trigger component (51) of the ignition micro switch (5) extends into the window (631) so as to cooperate with the boss (31); The first top surface (511) of the trigger component (51) of the ignition micro switch (5) is an inclined surface, and the first bottom surface (311) of the boss (31) is a plane; the detection micro switch (7) is also included, and the portion of the knob rod (3) located outside the valve cover (6) also has an arc-shaped auxiliary boss (34) and an auxiliary yielding plane (35), the auxiliary boss (34) is located above the yielding plane (32) and the boss (31), and the third radial distance (D3) between the outer peripheral surface of the auxiliary boss (34) and the central axis (X) of the knob rod is greater than the distance between the auxiliary yielding plane (35) and the central axis of the knob rod. (X), the detection trigger component (71) of the detection micro switch (7) can be triggered by the auxiliary boss (34); when the knob rod (3) is in the original position state and the original position pressed down state, the detection trigger component (71) of the detection micro switch (7) is opposite to the auxiliary yielding plane (35), so that the detection trigger component (71) of the detection micro switch (7) is not triggered; after the knob rod (3) is pressed down at the original position and deflected by an angle, the detection trigger component (71) of the detection micro switch (7) is triggered by the auxiliary boss (34) and turned on.

2. The gas valve with a child lock structure according to claim 1, characterized in that: The ignition micro switch (5) is fixed on the valve cover.

3. The gas valve with a child lock structure according to claim 1, characterized in that: The invention also comprises a detection micro switch (7); when the knob rod (3) is in the original position and is not pressed down, the boss (31) touches the detection trigger component (71) of the detection micro switch (7), and the detection micro switch (7) is not turned on; after the knob rod (3) is pressed down in the original position, the boss (31) leaves the detection trigger component (71) of the detection micro switch (7), and the detection micro switch (7) is reset and turned on.

4. The gas valve with a child lock structure according to claim 3, characterized in that: The detection micro switch (7) is fixed on the valve cover (6).

5. The gas valve with a child lock structure according to claim 4, characterized in that: The second bottom surface (711) of the detection trigger component (71) of the detection micro switch (7) is an inclined surface, and the second top surface (313) of the boss (31) is a plane.

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