A stopcock valve

Abstract

This invention discloses a plug valve. Through optimized structural design, the outer circumferential surface of the valve core forms a conical rotating fit with the valve body. The valve core also includes a large-diameter end and a small-diameter end. The large-diameter end is close to the buffer gas chamber. The gas enters the ventilation chamber from the buffer gas chamber through the air inlet of the large-diameter end. The valve core structure of the plug valve provided by this invention includes a large-diameter end and a small-diameter end. By using the large-diameter end of the valve core for air intake, the sealing conical surface between the valve core and the valve body can be pressed tightly under the action of air pressure, which can relatively reduce the risk of valve core ejection and ensure safe use even in high-pressure environments.

Description

Technical Field

[0001] This invention relates to the field of gas control technology, and more specifically to a plug valve. Background Technology

[0002] A stopcock valve is a core component of a household gas stove, used for ignition, flame adjustment, and flameout control in mechanical gas stoves. A stopcock valve typically includes a solenoid valve, a matching valve body, valve core, valve stem, and a pin / fork lever mechanism that actuates the solenoid valve. During operation, the valve stem pushes the pin, and the interaction between the pin and the fork lever mechanism allows gas from the solenoid valve to enter the main flow channel of the stopcock valve. The valve core then rotates, connecting to the gas outlet to regulate the gas flow. However, under high gas pressure, this design may pose a risk of the valve core popping out, potentially causing gas leakage.

[0003] Therefore, how to design a plug valve suitable for high-pressure applications and improve its safety is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a plug valve suitable for high-pressure applications, thereby improving operational safety.

[0005] This invention provides a plug valve, including a solenoid valve, a valve body, a valve core, a valve stem, a ejector pin, and a linkage. The valve body has an inlet channel, a valve cavity, an outlet channel, and a buffer cavity. The valve core is located in the valve cavity and includes a venting cavity. The side wall of the valve core has an adjusting flame hole that connects the venting cavity and the valve cavity, and the venting cavity connects to the buffer cavity. The outer peripheral surface of the valve core forms a conical rotational fit with the valve body. The valve stem drives the valve core to rotate relative to the valve body, enabling the outlet channel to connect with the adjusting flame hole and regulate the flow rate of the gas. The valve core also includes a large-diameter end and a small-diameter end. The large-diameter end is close to the buffer cavity. The gas enters the venting cavity from the buffer cavity through the inlet opening of the large-diameter end. The insertion end of the valve stem abuts against the ejector pin and can be axially displaced relative to the valve core. At least part of the ejector pin is located in the venting cavity and can be adapted to the power end of the linkage.

[0006] The plug valve provided by this invention, through optimized structural design, enables the outer peripheral surface of the valve core to form a conical rotating fit pair with the valve body. The valve core also includes a large-diameter end and a small-diameter end. The large-diameter end is close to the buffer gas chamber. The gas enters the ventilation chamber from the buffer gas chamber through the air inlet of the large-diameter end. The valve core structure of the plug valve provided by this invention includes a large-diameter end and a small-diameter end. By using the large-diameter end of the valve core for air intake, the sealing conical surface between the valve core and the valve body can be pressed tightly under the action of air pressure, which can relatively reduce the risk of valve core ejection and can be used safely in high-pressure environments. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the front view of the plug valve described in a specific embodiment;

[0008] Figure 2 for Figure 1 Another perspective view of the plug valve shown;

[0009] Figure 3 To pass Figure 1 The sectional view shown is formed by the valve stem axis and a section plane perpendicular to the third direction Z.

[0010] Figure 4 To pass Figure 1 A cross-sectional view of the solenoid valve shown, formed by the centerline and a section plane perpendicular to the second direction Y.

[0011] Figure 5 To pass Figure 1 A cross-sectional view showing the intake channel centerline and a section plane perpendicular to the second direction Y;

[0012] Figure 6 A schematic diagram of the solenoid valve in its open state is shown.

[0013] Figure 7 for Figure 3 Enlarged view of part A;

[0014] Figure 8 This is a structural schematic diagram of the linkage component described in a specific embodiment.

[0015] In the picture:

[0016] Solenoid valve 1, valve body 2, valve stem 3, valve core 4, ejector pin 5, outer ring air outlet channel 6, inner ring air outlet channel 7, linkage 8, air inlet channel 9, valve chamber 10, venting chamber 11, outer ring adjusting flame hole 12, inner ring adjusting flame hole 13, buffer air chamber 14, internal cavity 15, air inlet 16, air outlet 17, valve opening component 18, power end 19, guide part 20, sealing ring 21, resistance end 22, baffle 23, first axial limiting part 24, first elastic element 25, mounting groove 26, baffle guide recess 27, small diameter inner cavity 28, second elastic element 29, protrusion 30, second axial limiting part 31, third elastic element 32, transition cavity 33. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Without loss of generality, this embodiment uses the plug valve shown in the figure as the main subject of description, and details the specific implementation scheme of its high-pressure protection structure. By applying pressure and rotating the valve stem of the plug valve, the gas medium flowing in from the inlet channel can be reasonably distributed to the inner ring outlet channel and the outer ring outlet channel. It should be understood that the shape and proportion of each component and the dimensional relationship between the components do not constitute a substantial limitation on the technical solution claimed in this application.

[0019] Please see Figure 1 and Figure 2 ,in, Figure 1 This is a schematic diagram of the front view of the plug valve described in this embodiment. Here, "front view" refers to the side where the air intake passage 9 is located. Figure 2 A schematic diagram of a plug valve shown from another perspective.

[0020] The stopcock valve includes a solenoid valve 1 and a valve body 2 fixedly connected. The valve body 2 has an inlet channel 9, a valve chamber 10, and an outer ring outlet channel 6 and an inner ring outlet channel 7 communicating with the valve chamber 10. The valve core 4 is placed inside the valve chamber 10 of the valve body 2, and its side wall has an outer ring regulating flame hole 12 and an inner ring regulating flame hole 13 connecting its ventilation chamber 11 and the valve chamber 10. Gas enters the inlet channel 9 through the gas inlet of the valve body 2, passes through the solenoid valve, then enters the valve core 4, and finally connects to the outer ring outlet channel 6 and the inner ring outlet channel 7 via the outer ring regulating flame hole 12 and inner ring regulating flame hole 13 on the side of the valve core 4, respectively, thus supplying gas to the gas stove. (Please refer to...) Figure 3 and Figure 4 ,in, Figure 3 This is a sectional view formed by a section plane passing through the valve stem axis and perpendicular to the third direction Z. Figure 4 This is a cross-sectional view formed by a section plane passing through the centerline of the solenoid valve and perpendicular to the second direction Y.

[0021] It should be noted that the gas outlet channels used to provide the gas output path are not limited to the two shown in the figure: outer ring gas outlet channel 6 and inner ring gas outlet channel 7. Depending on the firepower design of different gas stoves, it can be set to only one gas outlet channel, or multiple other gas outlet channels.

[0022] The valve core 4 includes a large-diameter end, a small-diameter end, a sealing part, a first elastic element 25, and a second elastic element 29. The outer peripheral surface of the valve core 4 forms a conical rotating fit pair with the valve cavity 10 of the valve body 3 to adjust the flow state of the outer ring gas outlet channel 6 and the inner ring gas outlet channel 7 with the corresponding regulating flame hole. That is, the overlapping area of ​​the gas outlet and the gas outlet hole is different, so as to control the difference in gas output. Specifically, as shown in the figure, the large-diameter end is close to the buffer gas cavity 14. In this way, the gas enters the ventilation cavity 11 from the buffer gas cavity 14 through the air inlet of the large-diameter end. Its small-diameter end includes a small-diameter inner cavity 28. At least part of the ejector pin 5 is located in the ventilation cavity 11 and can be adapted to the power end of the linkage 8. The insertion end of the valve stem 2 can be axially displaced relative to the valve core 4 and abut against the ejector pin 5. The valve stem 3 is inserted into the valve core 4, and the two can rotate synchronously. The air inlet of the vent chamber 11 is located at the large diameter end of the conical rotating mating pair. Air is introduced from the large end of the valve core 4, and the actual air inlet direction is the same as the installation direction of the conical rotating mating pair.

[0023] In this design, the internal cavity 15 of the solenoid valve 1 is connected to the air intake channel 9 through its air inlet 16, and an opening component 18 adapted to its air outlet 17 is provided within the internal cavity 15. The air inlet of the valve chamber 10 of the valve body 2 is connected to its buffer air chamber 14, and the air outlet 17 of the solenoid valve 10 is connected to the venting chamber 11 of the valve core 4 through the buffer air chamber 14. Please refer to the above description. Figure 4 and Figure 5 As shown, where, Figure 5 To pass Figure 1 The cross-sectional view shown is formed by the centerline of the air intake passage 9 and a section plane perpendicular to the second direction Y.

[0024] One end of the ejector pin 5 is inserted into the vent chamber 11 of the valve core 4 and is adapted to the power end 19 of the linkage 8 placed in the buffer chamber 14. A sealing ring 21 is provided between the guide portion 20 of the valve core 4 and the ejector pin 5. The resistance end 22 of the linkage 8 is adapted to the valve opening component 18 through the air outlet 17 of the solenoid valve 1. The insertion end of the valve stem 3 can be axially displaced relative to the valve core 4 and is pressed against the other end of the ejector pin 5 to apply an opening force to the valve opening component 18 through the ejector pin 5 and the linkage 8. Please refer to [further details to be added]. Figure 6 The figure shows a schematic diagram of the solenoid valve in the open state.

[0025] Similar to existing technologies, the switch side can be subjected to axial displacement opening force and rotational air volume adjustment force. In use, operating the switch side of the valve stem 3 pushes the valve stem 3 to move axially and press against the pin 5. The pin 5 moves axially synchronously, and its insertion end presses against the power end 19 of the linkage 8. Utilizing the lever principle, the resistance end of the linkage 8 presses against the opening component 18 of the solenoid valve 1. The opening component 18 gradually separates from the air outlet 17, realizing the connection between the internal opening chamber 15 of the solenoid valve 1 and the buffer air chamber 14 of the valve body 2. In this way, the gas flowing in from the intake channel 9 passes sequentially through the intake port 16, internal cavity 15, outlet 17 and buffer gas chamber 14 of the solenoid valve 1, and enters the ventilation chamber 11 of the valve core 4. At this time, as the valve stem 3 drives the valve core 4 to rotate and adjust, the flow state between the outer ring adjusting flame hole 12 and the inner ring adjusting flame hole 13 on the side of the valve core 4 and the outer ring outlet channel 6 and the inner ring outlet channel 7, respectively, is adjusted. Thus, by changing the flow cross section, the gas supply is met to meet the actual use needs.

[0026] When the gas intake pressure fluctuates abnormally or increases, the pressure acts on the large-diameter end of the conical rotating mating pair, which can further tighten the sealing conical surface between the valve core and the valve body. The higher the gas pressure, the better the sealing performance. At the same time, excessive clamping force will increase the friction between the conical rotating mating pair, and the torque required to turn the plug valve will increase. This will further alert the customer to a problem in the gas circuit through user operation.

[0027] To ensure both the stability of the ejector pin 5's displacement and a good seal between the ejector pin 5 and the valve core 4, the guide portion 20 can be further extended radially from the side wall of the valve core 4, adapting to the outer diameter of the ejector pin 5 to provide good guidance. Correspondingly, the mounting groove 26 of the sealing ring 21 is located on the end face of the guide portion 20 near the vent cavity 11; specifically, it is located on the side of the vent cavity 11. Please refer to [further details omitted]. Figure 5 The image is Figure 7 Enlarged schematic diagram of part A.

[0028] Furthermore, a baffle 23 that axially presses against the sealing ring 21 can be provided in the vent cavity 11 of the valve core 4. Correspondingly, a first axial limiting part 24 is provided on the inner wall of the valve cavity 10 of the valve body 2. Preferably, an elastic retaining ring is used, and a retaining ring mounting groove can be opened on the inner wall of the valve cavity 10 for easy assembly and maintenance. A first elastic element 25 is provided between the baffle 23 and the first axial limiting part 24, and is configured such that the first elastic element 25 has a pre-compression deformation amount to maintain the sealing performance of the conical surface rotational mating pair. That is to say, the first elastic element 25 is pre-compressed before assembly, and at the same time, it presses against the sealing ring 21 and is reliably held in the mounting groove 26, ensuring that both seals have good sealing performance.

[0029] Preferably, the open end of the mounting groove 26 extends radially to form a baffle guide recess 27, the inner wall size of which is adapted to the size of the baffle 23. Thus, it provides a basic guiding function for the baffle 23. When the dynamic cooperation between the components exerts a radial force on the baffle 23, it can also ensure that the baffle 23 is always kept in the baffle guide recess 27.

[0030] Alternatively, the body of the valve core 4 extends axially from the guide portion 20 to form a small-diameter inner cavity 28 to accommodate the valve stem 3. The insertion end of the valve stem 3 is placed inside the small-diameter inner cavity 28 and pressed against the other end of the ejector pin 5. Here, the valve stem 3 and the side wall of the small-diameter inner cavity 28 are in clearance fit to achieve axial relative displacement between them. It is understood that, based on the functional requirement of axial relative displacement between them, the synchronous rotation of the valve stem 3 and the valve core 4 can be achieved in different ways, such as, but not limited to, an axial groove (not shown in the figure) is opened along the side wall of the small-diameter inner cavity 28. By using a pin radially inserted into the insertion end of the valve stem 3 and the groove, the valve stem 3 can drive the valve core 4 to rotate, thereby regulating the gas flow rate.

[0031] In addition, to enable the component to quickly reset, a reset force can be provided by the second elastic element 29. Specifically, in conjunction with Figure 3 and Figure 5 As shown, the other end of the ejector pin 5 has a radially outward protrusion 30. The second elastic element 29 is disposed between the protrusion 30 and the bottom wall of the small-diameter inner cavity 28, and is configured such that: under the opening force of the valve stem 3, the second elastic element 29 can deform with the axial displacement of the ejector pin 5 to provide the reset force of the ejector pin 5, and should meet the following condition: the elastic coefficient of the first elastic element 25 is greater than the elastic coefficient of the second elastic element 29. Thus, when the ejector pin 5 is pushed to perform axial displacement, the conical rotating fit pair between the valve core 4 and the valve body 2 is always in a good sealing relative position.

[0032] Furthermore, a second axial limiting part 31 is provided on the valve stem 3 located outside the valve body 2. It can be understood that the second axial limiting part 31 can be set according to process feasibility, as long as it satisfies the axial limiting function of the third elastic element 32. As shown in the figure, the third elastic element 32 set between the second axial limiting part 31 and the valve body 2 is configured such that: under the opening force of the valve stem 3, the third elastic element 32 can be compressed and deformed with the axial displacement of the valve stem 3 to provide the reset force of the valve stem 3; theoretically, the second elastic element 29, while providing the reset force of the ejector pin 5, also participates in providing the reset force of the valve stem 3. Among them, the first working stroke F of the axial displacement of the protrusion 30 of the ejector pin 5 relative to the guide part 20 of the valve core 4 is greater than the second working stroke H of the axial displacement of the second axial limiting part 31 of the valve stem 3 relative to the valve body 2; with this setting, the maximum working stroke of the valve opening is directly related to and determined by the second working stroke H, which can avoid the second elastic element 29 being pressed and causing the valve core 4 to separate from the valve body 2, and avoid the safety hazard of the sealing performance failure of the conical rotating mating pair.

[0033] Here, "working stroke" refers to the displacement stroke of the physical distance between the two components minus the compressive limit dimension of the corresponding elastic element, rather than referring to the physical distance between the two components. Furthermore, it can be understood that, based on the valve opening function of the solenoid valve 1, the working stroke G required for the linkage 8 to push the valve opening component 18 to open the air outlet 17 of the solenoid valve 1 should be less than or equal to the second working stroke H of the second axial limiting part 31 of the valve stem 3 relative to the axial displacement of the valve body 2.

[0034] In this design, the first elastic element 25, the second elastic element 29, and the third elastic element 32 are all compression springs. The structure is simple and reliable, and has excellent assembly processability.

[0035] Furthermore, the specific implementation method for the linkage between the opening displacement of the ejector pin 5 and the opening action of the solenoid valve 1 can be designed based on the linkage lever principle. In accordance with the design requirements of the integrated and miniaturized plug valve trend, this linkage component 8 can preferably be adopted... Figure 8 The fork structure shown is shown in the figure.

[0036] The linkage 8 has a rotating shaft, which is combined with Figure 3 As shown, its rotating shaft is disposed in the buffer air chamber 14 along the aforementioned second direction Y, and its two ends are pivotally connected to the inner wall of the buffer air chamber 14 so as to flexibly change its working posture. Here, the valve opening component 18 of the solenoid valve 1 opens and moves along the aforementioned third direction Z, and its air outlet 17 is connected to the buffer air chamber 14 through the transition chamber 33 on its downstream side. This arrangement effectively takes into account the structural integration in different dimensions. As shown in the figure, the resistance end 22 of the linkage 8 adapted to the valve opening component 18 extends to the air outlet 17 of the solenoid valve 1 through the transition chamber 33.

[0037] It should be noted that the orientational relationships used in this article, such as "the second direction Y is perpendicular to the first direction X", "the third direction Z is perpendicular to the first direction X and the second direction Y respectively", or "the first direction X, the second direction Y and the third direction Z are perpendicular to each other", are only used to clearly express the relative positions and dynamic coordination relationships between components. The use of the above orientational relationships does not constitute a substantial limitation on the technical solution claimed in this application.

[0038] It should also be noted that the specific operating principles and implementation methods of functional components such as the electronic valve 1 in the above embodiments provided in this implementation method are not the core inventive point of this application. Those skilled in the art can implement them based on existing technology, so they will not be described in detail here. It should be understood that any technical means that are consistent with the core concept of this solution are within the scope of protection claimed in this application.

[0039] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A plug valve, characterized in that, The device includes a solenoid valve, a valve body, a valve core, a valve stem, a ejector pin, and a linkage. The valve body has an inlet channel, a valve cavity, an outlet channel, and a buffer gas cavity. The valve core is located in the valve cavity and includes a venting cavity. The side wall of the valve core has an adjusting flame hole that connects the venting cavity and the valve cavity, and the venting cavity connects to the buffer gas cavity. The outer peripheral surface of the valve core forms a conical rotational fit with the valve body. The valve stem drives the valve core to rotate relative to the valve body, enabling the outlet channel to connect with the adjusting flame hole and regulate the flow rate of the gas. The valve core also includes a large-diameter end and a small-diameter end. The large-diameter end is close to the buffer gas cavity. The gas enters the venting cavity from the buffer gas cavity through the inlet opening of the large-diameter end. The insertion end of the valve stem abuts against the ejector pin and can be axially displaced relative to the valve core. At least part of the ejector pin is located in the venting cavity and can be adapted to the power end of the linkage. The plug valve further includes a sealing part, a first elastic element, and a second elastic element. The sealing part, the first elastic element, and the second elastic element are sleeved on the pin. The small-diameter end includes a small-diameter inner cavity. The second elastic element is located in the small-diameter inner cavity, and the first elastic element is located in the vent cavity. A baffle that axially presses against the sealing part is provided in the vent cavity of the valve core. A first axial limiting part is provided on the inner wall of the valve cavity of the valve body. The first elastic element is placed between the baffle and the first axial limiting part and is configured such that the first elastic element has a pre-compression deformation amount to maintain the sealing performance of the conical rotating fit pair.

2. The plug valve according to claim 1, characterized in that, The valve core also includes a guide portion, the ejector pin extends into the venting cavity through the guide hole of the guide portion, one end of the sealing portion abuts against the guide portion, the guide portion extends radially from the side wall of the valve core, the sealing portion is specifically a sealing ring, and the guide portion is provided with a mounting groove for installing the sealing ring on the side near the venting cavity.

3. The plug valve according to claim 2, characterized in that, The opening end of the mounting groove extends radially to form a baffle guide small-diameter inner cavity, and the inner wall size of the baffle guide small-diameter inner cavity is adapted to the size of the baffle.

4. The plug valve according to claim 1, characterized in that, The insert end of the valve stem is placed inside the small-diameter inner cavity and pressed against the other end of the ejector pin; the other end of the ejector pin has a radially outward protrusion, and the second elastic element is placed between the protrusion and the bottom wall of the small-diameter inner cavity, and is configured such that: under the opening force of the valve stem, the second elastic element can deform with the axial displacement of the ejector pin to provide the reset force of the ejector pin, and the elastic coefficient of the first elastic element is greater than the elastic coefficient of the second elastic element.

5. The plug valve according to claim 4, characterized in that, A second axial limiting part is provided on the valve stem located outside the valve body. A third elastic element is provided between the second axial limiting part and the valve body. The valve stem is configured such that, under the opening force of the valve stem, the third elastic element can deform with the axial displacement of the valve stem to provide the reset force of the valve stem. Furthermore, the first working stroke of the axial displacement of the protrusion of the ejector pin relative to the guide part of the valve core is greater than the second working stroke of the axial displacement of the second axial limiting part of the valve stem relative to the valve body.

6. The plug valve according to claim 5, characterized in that, The internal cavity of the solenoid valve is connected to the air inlet channel through its air inlet. An opening component adapted to its air outlet is provided in the internal cavity. The second working stroke of the second axial limiting part of the valve stem relative to the axial displacement of the valve body is greater than or equal to the working stroke of the linkage pushing the opening component to open the air outlet of the solenoid valve.

7. The plug valve according to claim 6, characterized in that, The first axial limiting part is specifically an elastic retaining spring embedded in the inner wall of the valve cavity.

8. The plug valve according to any one of claims 5 to 7, characterized in that, The first elastic element, the second elastic element, and the third elastic element are all compression springs.

9. The plug valve according to claim 8, characterized in that, The linkage component is specifically a shift fork, the rotation shaft of which is arranged along the second direction and its two ends are pivotally connected to the inner wall of the buffer air chamber; the valve opening component of the solenoid valve is displaced along the third direction, and the air outlet of the solenoid valve is connected to the buffer air chamber through the transition chamber on its downstream side; and the resistance end of the shift fork adapted to the valve opening component extends to the air outlet of the solenoid valve through the transition chamber; wherein, the displacement direction of the valve stem and the ejector pin is the first direction, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction respectively.

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