Gas cock valve

Abstract

The application discloses a gas cock valve, which comprises a valve body, a valve core, a valve rod, a box body and a motor. The valve body is provided with a valve core cavity with one side opening; the valve core is rotatably installed in the valve core cavity; one end of the valve rod is combined with the valve core and used for operating the valve core to rotate; the box body is attached to the valve body and seals the opening side of the valve core cavity, and the valve rod penetrates through the box body; the motor has an output shaft which penetrates into the box body and is provided with a transmission assembly between the output shaft and the valve rod. The box body is used to replace the cover plate and the bracket of the traditional cock valve, so that the structure is simplified and the manufacturing cost is reduced.

Description

Technical Field

[0001] This application relates to a gas valve, and more particularly to a simplified electrically and manually operated dual-purpose gas plug valve. Background Technology

[0002] The gas rotary valve is the core component of a gas stove. It generally includes a valve body, a valve core, a valve stem, a fork, and a solenoid valve. The valve body has an inlet channel, an outlet channel, and a valve core cavity between the two. The valve core is installed in the valve core cavity, and one end of the valve stem extends into the valve body and connects with the valve core.

[0003] Traditional gas valves typically have a cover plate fitted onto the valve stem to seal the valve core cavity, with a bracket on the cover plate to support the valve stem. For automatic control, some gas valves are equipped with a motor, and a transmission assembly is installed between the motor's output shaft and the valve stem. To protect this transmission assembly from interference, it is usually housed inside a housing, which is often fixed to a bracket. This increases the height of the gas valve and makes its structure more complex. Summary of the Invention

[0004] This application provides a gas rotary valve that solves the problems of existing electronically controlled gas valves having a large height and complex structure.

[0005] Gas rotary valve, including:

[0006] The valve body has a valve core cavity with an opening on one side;

[0007] A valve core, which is rotatably mounted within the valve core cavity;

[0008] A valve stem, one end of which is connected to the valve core, for operating the valve core to rotate;

[0009] A housing, which is attached to the valve body and closes the opening side of the valve core cavity, with the valve stem passing through the housing;

[0010] The motor has an output shaft that passes through the housing and is connected to the valve stem by a transmission assembly.

[0011] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0012] Optionally, the valve stem is provided with a radially extending pin at its end, and the valve core is provided with a notch that mates with the pin.

[0013] The side of the sealed valve core cavity of the housing is provided with a limiting protrusion that cooperates with the pin in the initial position to restrict the rotation of the valve stem.

[0014] Optionally, the limiting protrusion is an arc shape extending circumferentially along the valve stem.

[0015] Optionally, a micro switch for controlling ignition is fixedly installed on the housing, and the portion of the valve stem located inside the housing is provided with a trigger element that is axially fixed and extends out of the housing to activate the micro switch.

[0016] Optionally, the trigger includes a base that fits onto the valve stem and a working part that extends out of the housing, the base and the working part being at different heights, and the inner side of the housing having a recess to accommodate the base;

[0017] A compression spring is fitted onto the valve stem to abut against the base, and the compression spring drives the working part to abut against the inner side of the housing.

[0018] Optionally, the trigger has a limiting portion that extends in a different direction from the working portion and is at the same height.

[0019] Optionally, the transmission assembly includes a first transmission component and a second transmission component sleeved on the valve stem, wherein one of the first transmission component and the second transmission component rotates synchronously with the output shaft of the motor, and the other rotates synchronously with the valve stem.

[0020] The first transmission component has a linkage groove extending around the valve stem axis. The central angle of the linkage groove is A1, and the rotation stroke of the valve stem is A2, where A1 is greater than or equal to A2.

[0021] The second transmission component has a linkage handle that extends into the linkage groove. Along the circumference of the valve stem, the linkage handle interacts with both ends of the linkage groove to transmit power.

[0022] Optionally, the first transmission component is synchronized with the output shaft of the motor, and the second transmission component is synchronized with the valve stem;

[0023] The housing is equipped with a sensing element for detecting the position of the second transmission component and for controlling the motor;

[0024] A magnetic sensing element is fixed on the second transmission component. The sensing element consists of multiple Hall sensors arranged around the outer periphery of the valve stem to detect the position of the magnetic sensing element.

[0025] Optionally, A1 is 120 to 270 degrees, the rotation direction of the valve stem when operating from off to on is the first direction, and the rotation direction when operating from on to off is the second direction; each transmission component has an initial position, in which the linkage groove and the linkage handle avoid each other in the circumferential direction of the valve stem, releasing the stroke of the valve stem rotating in the first direction.

[0026] Optionally, the box body includes a box bottom and a box cover that cooperate with each other. The box cover has a post extending to the second transmission member on the side facing the box bottom. A slidable steel ball is provided in the post and a return spring that pushes the steel ball to partially protrude from the post and contact the second transmission member. The second transmission member is provided with a plurality of circumferentially distributed slots that cooperate with the steel ball.

[0027] This application uses a housing instead of the cover and bracket of a traditional plug valve, simplifying the structure and reducing manufacturing costs. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of a gas plug valve according to an embodiment provided in this application;

[0029] Figure 2 for Figure 1 A structural diagram of the middle housing and valve stem;

[0030] Figure 3 for Figure 1 Cross-sectional view of a gas rotary valve;

[0031] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0032] Figure 5 for Figure 1 Exploded view of a gas rotary valve;

[0033] Figure 6 for Figure 1 An exploded view of a gas rotary valve from another perspective;

[0034] Figure 7 for Figure 5 A schematic diagram of the structure of the first transmission component, the second transmission component, and the valve stem;

[0035] Figure 8 for Figure 5 Another structural schematic diagram of the first transmission component, the second transmission component, and the valve stem;

[0036] Figure 9 This is a schematic diagram showing both the first and second transmission components in their initial states.

[0037] Figure 10 This is a schematic diagram showing the state in which the motor drives the first transmission component and the second transmission component to be linked together along the Y direction in one embodiment.

[0038] Figure 11 for Figure 10 A schematic diagram of the motor resetting to its initial position;

[0039] Figure 12 This is a schematic diagram of an embodiment where a motor drives a first transmission component to rotate along the X direction to a state where it is linked with a second transmission component.

[0040] Figure 13 This is a schematic diagram showing the state in which the motor drives the first transmission component and the second transmission component to be linked together along the X direction in one embodiment.

[0041] Figure 14 for Figure 13 A schematic diagram showing the state of the motor resetting to its initial position.

[0042] The annotations in the figure are explained as follows:

[0043] 100. Gas rotary valve;

[0044] 10. Valve body; 11. Valve core cavity;

[0045] 20. Valve core;

[0046] 30. Valve stem; 31. Adjusting needle;

[0047] 40. Box body; 41. Box bottom; 411. Limiting protrusion; 42. Box cover; 421. Hole post; 422. Steel ball; 423. Return spring; 43. Micro switch; 44. Trigger; 441. Base; 442. Working part; 443. Limiting part; 45. Recess; 46. Snap ring; 47. Circuit board; 48. Compression spring;

[0048] 50. Motor; 51. Output shaft; 52. Transmission assembly; 53. Hall sensor; 54. First transmission component; 541. Linkage groove; 55. Second transmission component; 551. Linkage handle; 552. Limiting groove; 553. Magnetic element. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0052] like Figures 7-8 As shown in the figure, Y and X represent the first and second directions of this application, respectively, and the X and Y directions are opposite to each other, which can also be understood as the rotation direction of the valve stem 30.

[0053] Gas rotary valves on the market generally include a valve body 10, a valve core 20, a valve stem 30, a cover plate, and a bracket. The valve body 10 contains a valve core cavity 11. The cover plate is fitted onto the valve stem 30 to seal the valve core cavity 11. The bracket is mounted on the cover plate to prevent the valve stem 30 from tipping over. Some gas valves, for automatic control, have a motor 50 mounted on the valve body. A transmission assembly is installed between the output shaft 51 of the motor 50 and the valve stem 30. This transmission assembly is usually located inside a housing, which is fixed to a bracket. This significantly increases the height of the gas valve, making it inconvenient to install on a stove and complicating its structure.

[0054] To solve the above problems, such as Figures 1-8 As shown in the figure, this application provides a gas rotary valve 100, including a valve body 10, a valve core 20, a valve stem 30, a housing 40, and a motor 50.

[0055] The valve body 10 has an air inlet channel, a valve core cavity 11 with an opening on one side, and an air outlet channel. The air inlet channel and the valve core cavity 11 intersect to form an air inlet, and the air outlet channel and the valve core cavity 11 intersect to form an air outlet. The valve core 20 is rotatably mounted in the valve core cavity 11. One end of the valve stem 30 extends into the valve body 10 and engages with the valve core 20 to operate the rotation of the valve core 20. The housing 40 is fixedly mounted on the valve body 10, with one side of the housing 40 abutting against the valve body 10 and sealing the valve core cavity 11. The valve stem 30 passes through the housing 40. The motor 50 has an output shaft 51 that passes through the housing 40, and a transmission assembly 52 is provided between the output shaft 51 and the valve stem 30.

[0056] The gas plug valve 100 of this application uses a housing 40 instead of the cover plate and bracket of a traditional plug valve, and installs the transmission assembly 52 inside the housing 40, which simplifies its structure and reduces its height.

[0057] In one embodiment, considering that the valve stem 30 can drive the valve core 20 to rotate, the end of the valve stem 30 is provided with a radially extending pin 31, and the valve core 20 is provided with a notch (not shown in the figure) that cooperates with the pin 31. There are two pins 31, which are arranged facing each other. The side of the housing 40 that encloses the valve core cavity 11 is provided with a limiting protrusion 411 that cooperates with the pin 31 in the initial position to restrict the rotation of the valve stem 30.

[0058] Specifically, the limiting protrusion 411 is an arc extending circumferentially along the valve stem 30, and the length of the arc should be greater than the maximum angle of valve stem rotation. Before ignition, the valve stem 30's pin 31 is initially positioned against the limiting protrusion 411, preventing the valve stem 30 from rotating. When the valve stem 30 is pressed down for ignition, the pin 31 moves downward and passes over the limiting protrusion 411. At this point, the limiting protrusion 411 no longer restricts the pin 31, and the valve stem 30 can rotate.

[0059] In one embodiment, a microswitch 43 for controlling ignition is fixedly mounted on the housing 40. The portion of the valve stem 30 located inside the housing 40 is provided with a trigger 44 that is axially fixed and extends out of the housing 40 to activate the microswitch 43. The trigger 44 includes a base 441 that is sleeved on the valve stem 30 and a working portion 442 that extends out of the housing 40. A circular hole with clearance fit to the valve stem 30 is provided at the middle position of the base 441. The base 441 and the working portion 442 are at different heights. The inner side of the housing 40 has a recess 45 to accommodate the base 441. A compression spring 48 is sleeved on the valve stem 30 to abut against the base 441. The compression spring 48 drives the working portion 442 to abut against the inner side of the housing 40. When the valve stem 30 is not ignited, the spring 48 abuts against the trigger 44, the base 441 is located in the recess 45, and the working part 442 abuts against the inner side of the housing 40, ensuring that the trigger 44 maintains relative balance and avoiding safety hazards caused by the trigger 44 tilting and triggering the micro switch 43.

[0060] In order to achieve axial relative fixation between the trigger 44 and the valve stem 30, a retaining ring 46 is provided on the valve stem 30 above the trigger 44. The retaining ring 46 is embedded in a groove on the circumferential surface of the valve stem 30, and its outer diameter is larger than the diameter of the circular hole. In addition, a gasket is provided between the retaining ring 46 and the trigger 44 to prevent loosening.

[0061] When the valve stem 30 is pressed down to ignite, the retaining ring 46 drives the trigger 44 to press down the spring 48. During the downward movement of the working part 442, it will touch the spring of the micro switch 43, thereby opening the ignition device.

[0062] In one embodiment, to further restrict the rotation of the valve stem 30, the trigger 44 has a limiting portion 443 that extends in a different direction and is at the same height as the working portion 442. When the valve stem 30 is not ignited, the limiting portion 443 also abuts against the inner side of the housing 40 to ensure that the trigger 44 is in a horizontal state.

[0063] In one embodiment, the transmission assembly 52 includes a first transmission member 54 and a second transmission member 55 sleeved on the valve stem 30. One of the first transmission member 54 and the second transmission member 55 rotates synchronously with the output shaft 51 of the motor 50, and the other rotates synchronously with the valve stem 30. The first transmission member 54 has a linkage groove 541 extending around the axis of the valve stem 30. The central angle of the linkage groove 541 is A1, and the rotation stroke of the valve stem is A2, and A1 is greater than or equal to A2. The second transmission member 55 has a linkage handle 551 that extends into the linkage groove 541. Along the circumference of the valve stem 30, the linkage handle 551 interacts with the two ends of the linkage groove 541 for transmission.

[0064] When the gas rotary valve 100 is manually controlled, since A1 is greater than or equal to A2, the manual adjustment valve stem 30 has a certain margin of motion and will not drive the motor 50, thus reducing the mutual interference between the two drives: the motor 50 and manual control.

[0065] Specifically, in this embodiment, the first transmission component 54 is synchronized with the output shaft 51 of the motor 80, and the second transmission component 55 is synchronized with the valve stem 30. A sensing element for detecting the position of the second transmission component 55 and controlling the motor 50 is provided inside the box bottom. A magnetic sensing element 553 is fixed on the second transmission component 55. The sensing element consists of multiple Hall sensors 53 arranged around the outer periphery of the valve stem 30 to detect the position of the magnetic sensing element 553. A circuit board 47 is provided inside the box body 40, and the Hall sensors 53 are disposed on the circuit board 47. The number of Hall sensors 53 can be set according to specific needs; specifically, each Hall sensor 53 corresponds to a firepower level.

[0066] The motor's output shaft 51 is equipped with a driving gear, and the first transmission component 54 is a driven gear. The driven gear is slidably sleeved on the valve stem 30 along its axial direction and rotates with it. The driving gear and driven gear mesh directly or are linked through a transmission component, as shown in the diagram, through a gear set. It can be seen that the driving gear has a smaller diameter, while the driven gear has a larger diameter, and the intermediate gear set also features alternating large and small gears. This achieves speed reduction while increasing the driving force on the valve stem 30.

[0067] The second transmission member 55 is generally disc-shaped and has a through hole through which the valve stem 30 passes. The outer wall of the valve stem 30 fits against the inner wall of the through hole, and the outline of the through hole is non-circular. The second transmission member 55 is slidably sleeved on the valve stem 30 along the axial direction, so the second transmission member 55 can rotate synchronously with the valve stem 30. For example, the through hole on the second transmission member 55 is D-shaped, and a portion of the cross-section of the valve stem 30 is D-shaped. In this application, the other end of the compression spring 48 abuts against the second transmission member 55, driving the first transmission member 54 and the second transmission member 55 to remain in contact along the axial direction of the valve stem 30.

[0068] In one embodiment, A1 is 120 to 270 degrees, the rotation direction of the valve stem 30 when operating from off to on is the first direction (Y direction), and the rotation direction when operating from on to off is the second direction (X direction); each transmission component has an initial position, in which the linkage groove 541 and the linkage handle 551 avoid each other in the circumferential direction of the valve stem 30, releasing the stroke of the valve stem 30 rotating in the first direction.

[0069] Specifically, such as Figures 9-12 As shown, M1 is the initial position of the first transmission member 54, M2 is the specific gear position of the first transmission member 54, and N is the initial position of the linkage handle 551 in the second transmission member 55. When the valve stem 30 acts as the driving member, it only drives the second transmission member 55 to rotate and fire in the first direction. At this time, the linkage handle 551 rotates relative to the linkage groove 541 until the specific gear position (M2), but it does not collide with the linkage groove 541, so it will not drive the motor and completely eliminate the hidden danger.

[0070] like Figures 9-12 As shown, the motor 50 drives the first transmission component 54 to rotate in the Y direction through the transmission component until the preset firepower value is reached. Then the motor 50 drives the first transmission component 54 to rotate in the opposite direction to the original position M1.

[0071] Similarly, such as Figures 13-14 As shown, the motor 50 drives the first transmission component 54 to rotate in the X direction through the transmission component. Then, the first transmission component 54 abuts against the second transmission component 55 and continues to rotate until the preset firepower value is reached. Then, the motor 50 drives the first transmission component 54 to rotate in the opposite direction back to the original position M1.

[0072] When the valve stem 30 acts as the active component, it can drive the second transmission component 55 to rotate, thereby adjusting the specific flame intensity of the gas within this range.

[0073] In one embodiment, the housing 40 includes a housing bottom 41 and a housing cover 42 that cooperate with each other. The housing bottom 41 is installed on the outside of the valve body 10 by screws or the like, and the side of the housing bottom 41 facing away from the valve body 10 has an opening. The housing cover 42 and the circuit board 47 are detachably installed at the opening by screws or the like. The valve stem 30 extends out of the housing 40 from one side of the housing cover 42. In this application, a recess 45 is provided on the housing cover 42.

[0074] The lid 42 has a post 421 extending to the second transmission member 55 on the side facing the bottom 41. A slidable steel ball 422 is disposed within the post 421, along with a return spring 423 that pushes the steel ball 422 partially out of the post 421 to contact the second transmission member 55. The steel ball 422 can slide within the post 421 and contact the second transmission member 55. A screw is disposed at the end of the post 421 facing away from the second transmission member 55. The two ends of the return spring 423 abut against the screw and the steel ball 422 respectively. Due to the force of the return spring 423, the steel ball 422 always contacts the upper surface of the second transmission member 55. The second transmission member 55 has multiple circumferentially distributed limiting grooves 552 that cooperate with the steel ball 422. To facilitate the entry and exit of the steel ball 422 from the limiting grooves 552, the two radially inclined sidewalls of the limiting grooves 552 are sloped.

[0075] When the second transmission component 55 rotates with the valve stem 30, the steel ball 422 slides on the upper surface of the second transmission component 55. Since the limiting groove 552 is set on the sliding trajectory of the steel ball 422, when the steel ball 422 encounters the limiting groove 552, under the action of the return spring 423, the steel ball 422 will fall into the limiting groove 552. Since the steel ball 422 is suddenly suspended in the air, it hits the surface of the second transmission component 55 and makes a clicking sound. Since the radially arranged sidewall of the limiting groove 552 is inclined, with continued rotation of the second transmission component 55, the steel ball 422 can easily climb out of the limiting groove 552, while compressing the return spring 423.

[0076] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0077] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A gas rotary valve, characterized in that, include: The valve body has a valve core cavity with an opening on one side; A valve core, which is rotatably mounted within the valve core cavity; A valve stem, one end of which is connected to the valve core, for operating the valve core to rotate; A housing, which is attached to the valve body and closes the opening side of the valve core cavity, with the valve stem passing through the housing; The motor has an output shaft that passes through the housing and a transmission assembly is provided between the output shaft and the valve stem; The transmission assembly includes a first transmission component and a second transmission component that are sleeved on the valve stem. One of the first transmission component and the second transmission component rotates synchronously with the output shaft of the motor, and the other rotates synchronously with the valve stem. The first transmission component has a linkage groove extending around the valve stem axis. The central angle of the linkage groove is A1, and the rotation stroke of the valve stem is A2, where A1 is greater than or equal to A2. The second transmission component has a linkage handle that extends into the linkage groove. Along the circumference of the valve stem, the linkage handle interacts with both ends of the linkage groove to transmit power.

2. The gas rotary valve according to claim 1, characterized in that, The valve stem is provided with a radially extending pin at its end, and the valve core is provided with a notch that mates with the pin. The side of the sealed valve core cavity of the housing is provided with a limiting protrusion that cooperates with the pin in the initial position to restrict the rotation of the valve stem.

3. The gas rotary valve according to claim 2, characterized in that, The limiting protrusion is an arc shape extending circumferentially along the valve stem.

4. The gas rotary valve according to claim 1, characterized in that, A micro switch for controlling ignition is fixedly installed on the housing, and a trigger element that is axially fixed and extends out of the housing to activate the micro switch is provided on the portion of the valve stem located inside the housing.

5. The gas rotary valve according to claim 4, characterized in that, The trigger includes a base that is fitted onto the valve stem and a working part that extends out of the housing. The base and the working part are at different heights, and the inner side of the housing has a recess to accommodate the base. A compression spring is fitted onto the valve stem to abut against the base, and the compression spring drives the working part to abut against the inner side of the housing.

6. The gas rotary valve according to claim 5, characterized in that, The trigger has a limiting part that extends in a different direction from the working part and is at the same height.

7. The gas rotary valve according to claim 1, characterized in that, The first transmission component is synchronized with the output shaft of the motor, and the second transmission component is synchronized with the valve stem; The housing is equipped with a sensing element for detecting the position of the second transmission component and for controlling the motor; A magnetic sensing element is fixed on the second transmission component. The sensing element consists of multiple Hall sensors arranged around the outer periphery of the valve stem to detect the position of the magnetic sensing element.

8. The gas rotary valve according to claim 1, characterized in that, A1 is 120~270 degrees. The rotation direction of the valve stem when operating from off to on is the first direction, and the rotation direction when operating from on to off is the second direction. Each transmission component has an initial position. In the initial position, the linkage groove and the linkage handle avoid each other in the circumferential direction of the valve stem, releasing the stroke of the valve stem rotating in the first direction.

9. The gas rotary valve according to claim 1, characterized in that, The box body includes a box bottom and a box cover that cooperate with each other. The box cover has a post extending to the second transmission component on the side facing the box bottom. A slidable steel ball is provided in the post and a return spring that pushes the steel ball to protrude from the post and contact the second transmission component. The second transmission component is provided with a plurality of circumferentially distributed slots that cooperate with the steel ball.

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