Proportional valve assembly and gas hob comprising same

Abstract

The utility model provides a proportional valve assembly and contain its gas -cooker, this proportional valve assembly contains valve body shell, two proportional valve front cavity and the proportional valve inter hole of intercommunication both, the processing hole is opened to valve body shell outer surface, this processing hole is coaxial with proportional valve inter hole, the diameter of processing hole is greater than or equal to the diameter of proportional valve inter hole, and the processing hole is inwards communicated one front cavity, processing hole is used as the auxiliary structure of processing proportional valve inter hole, and the processing hole is blocked after processing with the blocking piece, and the complete sealing surface is formed after blocking with valve body shell outer surface, saves the processing cost, and does not destroy the whole structure strength and the flow cross section of valve body shell.

Description

Technical Field

[0001] This utility model relates to the field of gas equipment technology, and in particular to a proportional valve assembly and a gas stove containing the same. Background Technology

[0002] In proportional valve assemblies that simultaneously possess inner and outer proportional valves, a through-hole is required to connect the cavities of the two proportional valves, ensuring consistent pressure within the inner and outer ring cavities. However, machining this through-hole typically requires disassembling the valve body or using specialized custom-made tools. This not only increases the steps involved in mold development and parts assembly, incurring additional equipment and labor costs, but may also compromise the structural reliability of the valve body.

[0003] Therefore, how to ensure the structural reliability of the proportional valve assembly while reducing the machining difficulty of the through hole between proportional valves has become a technical problem that urgently needs to be solved by those in the field. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defect of difficulty in processing the through hole between proportional valves in the prior art, and to provide a proportional valve assembly and a gas stove containing the assembly.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A proportional valve assembly includes a valve body shell, a front cavity of a first proportional valve, a front cavity of a second proportional valve, and a proportional valve through hole connecting the two front cavities. A machining hole is formed on the outer surface of the valve body shell, and the machining hole communicates inward to one of the front cavities. The machining hole is coaxially arranged with the proportional valve through hole, and the diameter of the machining hole is greater than or equal to the diameter of the proportional valve through hole. The proportional valve assembly also includes a sealing member that seals the machining hole.

[0007] If a traditional design without machining holes is used, machining the through-hole between proportional valves requires disassembling the valve body or using specialized custom-made tools. This not only increases the steps of mold development and parts assembly but also incurs additional equipment and labor costs. However, by creating a machining hole coaxially aligned with the through-hole on the outer surface of the proportional valve assembly, and connecting this hole inward to one of the front cavities, the machining hole serves as an auxiliary structure for machining the through-hole. After machining, it is sealed with a plugging component. Once sealed, the machining hole and the outer surface of the valve body form a complete sealing surface. This saves machining costs without compromising the overall structural strength or flow cross-section of the valve body.

[0008] Preferably, the proportional valve assembly further includes a first flow guiding structure and / or a second flow guiding structure, wherein,

[0009] The first flow guiding structure is disposed in the back cavity of the first proportional valve, and the first flow guiding structure smoothly transitions from the back cavity of the first proportional valve to the outlet of the first proportional valve.

[0010] The second flow guiding structure is disposed in the back cavity of the second proportional valve, and the second flow guiding structure smoothly transitions from the back cavity of the second proportional valve to the outlet of the second proportional valve.

[0011] By setting the first and second flow guiding structures and forming smooth transition flow guiding paths in the back cavity of the corresponding proportional valve, the fluid is guided to flow along the preset smooth path, avoiding the generation of eddies, reducing the friction loss between the fluid and the cavity wall, and significantly reducing the flow resistance.

[0012] Preferably, the proportional valve assembly further includes a first sealing part and a second sealing part, the first sealing part being disposed corresponding to the back cavity of the first proportional valve, and the second sealing part being disposed corresponding to the back cavity of the second proportional valve, the first sealing part and the second sealing part being an integrally formed structure.

[0013] The one-piece molded sealing part has no seams and can be precisely fitted to the sealing surfaces of the two back cavities at the same time to form a seamless sealing structure, which further enhances the tightness of the sealing surface. The fluid leakage rate is effectively reduced compared to the split structure. At the same time, the one-piece molded sealing part is easier to install and maintain, which can effectively reduce labor costs.

[0014] Preferably, the proportional valve assembly further includes a base plate, the base plate comprising two protruding structures.

[0015] The two protruding structures are respectively provided for the back cavity of the first proportional valve and the back cavity of the second proportional valve.

[0016] And / or, the two protruding structures form an interference fit with the back cavity of the first proportional valve and the back cavity of the second proportional valve, respectively;

[0017] And / or, the base plate and the valve body shell are connected by a locating pin.

[0018] By using the base plate as a single component to seal both the back cavities of the first and second proportional valves, multiple sealing elements are eliminated. The integrated sealing surface, formed by the structural fit between the base plate and the valve body shell, and the interference fit between the raised structure and the back cavity, effectively reduces fluid leakage. Furthermore, the connection between the base plate and the valve body shell via locating pins simplifies installation and disassembly.

[0019] Preferably, the proportional valve assembly further includes a cover plate, the valve body shell is provided with a plurality of first positioning holes, the cover plate includes two hollow bosses and a plurality of second positioning holes corresponding one-to-one with the first positioning holes, and the inner walls of the two hollow bosses are respectively provided for the valve bodies of the first proportional valve and the valve bodies of the second proportional valve.

[0020] The first positioning hole and the corresponding second positioning hole are coaxially arranged and connected to each other;

[0021] And / or, the cover plate has a symmetrical structure along the line connecting the centers of the first proportional valve and the second proportional valve.

[0022] The first positioning hole on the valve body shell corresponds one-to-one with the second positioning hole on the cover plate and is coaxially connected to form a rigid positioning reference, eliminating the need for repeated manual calibration during assembly. The inner wall of the hollow boss on the cover plate precisely fits the proportional valve body, forming a surrounding limiting structure that constrains the radial displacement of the valve body from the top and isolates external impurities, protecting the core components of the proportional valve body. The symmetrical structure of the cover plate along the line connecting the centers of the two proportional valves ensures no difference in left-right placement while maintaining the limiting strength of the hollow boss on the valve body and the connection stability of the positioning holes. This improves assembly tolerance without compromising the core support and protection function of the cover plate for the proportional valve assembly.

[0023] Preferably, the cover plate is provided with reinforcing ribs on the periphery of the hollow boss and / or the second positioning hole.

[0024] Reinforcing ribs are provided around the hollow boss and the second positioning hole. On the one hand, they can resist the reaction force of the valve body, avoid the limit failure caused by the deformation of the hollow boss, and ensure the flow control accuracy of the proportional valve. On the other hand, they can strengthen the rigidity of the structure around the second positioning hole and ensure the reliability of positioning and connection.

[0025] Preferably, the proportional valve assembly further includes a positioning bracket;

[0026] The positioning bracket is simultaneously positioned on the first proportional valve and the second proportional valve;

[0027] And / or, the positioning bracket has a symmetrical structure along the line connecting the centers of the first proportional valve and the second proportional valve.

[0028] When using independently positioned dual valves, positioning must be completed in two stages. During assembly, the relative positions of the two valves need to be measured repeatedly, resulting in a high rework rate. Using a positioning bracket to position the dual valves in one go can reduce manual assembly costs. Furthermore, when the dual proportional valves are in operation, the fluid pressure will generate a bidirectional force on the positioning bracket. By setting the bracket to a symmetrical structure, deformation of one side of the bracket due to uneven force can be avoided.

[0029] Preferably, the proportional valve assembly further includes a pressure detection port, which is connected to the first proportional valve and / or the second proportional valve.

[0030] The internal pressure of the proportional valve is monitored in real time through a pressure detection port, ensuring operational safety and flow control accuracy. Furthermore, since the chamber pressures of the first and second proportional valves are identical, only one pressure detection port is required to meet the pressure monitoring needs.

[0031] Preferably, the sealing element includes a screw, and the inner wall of the machined hole is formed with threads adapted to the screw.

[0032] By using screws to create threads on the inner wall of the machined hole, a removable seal can be achieved, significantly improving the convenience of later maintenance and repair. Furthermore, the threaded engagement between the screw and the machined hole inherently provides radial sealing, and the tight fit between the thread teeth prevents fluid leakage along the thread gaps.

[0033] This utility model also provides a gas stove, which includes the proportional valve assembly described above.

[0034] The positive and progressive effects of this utility model are as follows: by opening a machining hole on the outer surface of the proportional valve assembly, which is coaxially arranged with the through hole between the proportional valves, the machining hole only serves as a machining auxiliary structure. After machining, it is sealed by a sealing component. After sealing, the machining hole and the outer surface of the valve body form a complete sealing surface. This saves machining costs without damaging the overall structural strength or flow cross section of the valve body. Attached Figure Description

[0035] Figure 1 This is an assembly diagram of the valve body shell and the sealing component according to an embodiment of the present invention.

[0036] Figure 2 This is a front perspective view (a) of a proportional valve assembly according to an embodiment of the present invention.

[0037] Figure 3 This is a two-dimensional front view of a proportional valve assembly according to an embodiment of the present invention.

[0038] Figure 4 This is a three-dimensional schematic diagram of a positioning bracket according to an embodiment of the present invention.

[0039] Figure 5 This is a three-dimensional schematic diagram of a cover plate according to an embodiment of the present utility model.

[0040] Figure 6 This is a three-dimensional front view of a proportional valve assembly according to an embodiment of the present invention (III).

[0041] Figure 7This is a three-dimensional back view (a) of a proportional valve assembly according to an embodiment of the present invention.

[0042] Figure 8 This is a three-dimensional schematic diagram (a) of the base plate according to an embodiment of the present utility model.

[0043] Figure 9 This is a three-dimensional schematic diagram (II) of the base plate according to an embodiment of the present utility model.

[0044] Figure 10 This is a two-dimensional back view of a proportional valve assembly according to an embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] Proportional valve assembly 1

[0047] Valve body shell 10

[0048] Machining hole 11

[0049] First positioning hole 12

[0050] First proportional valve 20

[0051] The front cavity 21 of the first proportional valve

[0052] The back cavity 22 of the first proportional valve

[0053] First flow guiding structure 220

[0054] The valve body 23 of the first proportional valve

[0055] The outlet of the first proportional valve is 24.

[0056] Second proportional valve 30

[0057] The front cavity 31 of the second proportional valve

[0058] The back cavity 32 of the second proportional valve

[0059] Second flow guiding structure 320

[0060] The valve body 33 of the second proportional valve

[0061] The outlet of the second proportional valve is 34.

[0062] Proportional valve through hole 40

[0063] 50 sealing components

[0064] Base plate 70

[0065] Locating pin hole 71

[0066] 72 raised structures

[0067] Cover plate 80

[0068] Hollow boss 81

[0069] Second positioning hole 82

[0070] Reinforcing rib 83

[0071] Positioning bracket 90

[0072] Pressure detection port 100 Detailed Implementation

[0073] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0074] like Figures 1-10 As shown, this utility model provides a proportional valve assembly 1, which includes a valve body shell 10, a first proportional valve 20, a second proportional valve 30, a base plate 70, a cover plate 80, a positioning bracket 90, and a pressure detection port 100. The cover plate 80 and the positioning bracket 90 are stacked to correspond to the front cavity 21 of the first proportional valve and the front cavity 31 of the second proportional valve, respectively. The base plate 70 is disposed to correspond to the back cavity 22 of the first proportional valve and the back cavity 32 of the second proportional valve. Furthermore, the proportional valve assembly 1 includes a proportional valve inter-cavity through-hole 40 connecting the two front cavities. Gas first enters the front cavity 21 of the first proportional valve and flows into the front cavity 31 of the second proportional valve through the proportional valve inter-cavity through-hole 40. By adjusting the orifice diameters of the first proportional valve 20 and the second proportional valve 30, the gas flows from the front cavity into their respective corresponding back cavities and finally to the outlet. A machining hole 11 is provided on the outer surface of the valve body shell 10. The machining hole 11 is connected to the second proportional valve 30. The machining hole 11 and the through hole 40 between the proportional valves are coaxially arranged. The diameter of the machining hole 11 is greater than or equal to the diameter of the through hole 40 between the proportional valves. The proportional valve assembly 1 also includes a sealing member 50, which seals the machining hole 11.

[0075] In this embodiment, a machining hole 11 is formed on the outer surface of the proportional valve assembly 1, coaxially arranged with the proportional valve through hole 40. The machining hole 11 communicates with the second proportional valve 30. The machining hole 11 serves only as a machining auxiliary structure. After machining, it is sealed by a sealing member 50. After sealing, the machining hole 11 and the outer surface of the valve body shell 10 form a complete sealing surface. This saves machining costs without damaging the overall structural strength or flow cross-section of the valve body shell 10. In this embodiment, the machining hole 11 communicates with the second proportional valve 30 to facilitate machining of the proportional valve through hole 40. In other embodiments, the machining hole 11 can also communicate with the first proportional valve 20, which can also achieve the same effect of convenient machining. This part belongs to the prior art in this field and will not be described in detail here.

[0076] like Figures 1-10As shown, the proportional valve assembly 1 also includes a first flow guiding structure 220 and a second flow guiding structure 320, wherein,

[0077] The first flow guiding structure 220 is disposed in the back cavity 22 of the first proportional valve 20, and the first flow guiding structure 220 smoothly transitions from the back cavity 22 of the first proportional valve to the outlet 24 of the first proportional valve 20.

[0078] The second flow guiding structure 320 is disposed in the back cavity 32 of the second proportional valve, and the second flow guiding structure 320 smoothly transitions from the back cavity 32 of the second proportional valve to the outlet 34 of the second proportional valve 30.

[0079] In this embodiment, the first flow guiding structure 220 and the second flow guiding structure 320 respectively form a smooth transition flow guiding path in the back cavity 22 of the corresponding first proportional valve and the back cavity 32 of the second proportional valve to guide the fluid to flow to the outlet along the preset smooth path, avoid the generation of eddies, reduce the friction loss between the fluid and the cavity wall, and significantly reduce the flow resistance.

[0080] In this embodiment, the proportional valve assembly 1 further includes a first sealing part (not shown in the figure) and a second sealing part (not shown in the figure). The first sealing part is disposed on the back cavity of the first proportional valve 20, and the second sealing part is disposed on the back cavity 32 of the second proportional valve 30. The first sealing part and the second sealing part are integrally formed. The integrally formed sealing part has no splicing seams and can precisely fit with the sealing surfaces of the two back cavities at the same time to form a seamless sealing structure, further enhancing the tightness of the sealing surface. The fluid leakage rate is effectively reduced compared with the split structure. At the same time, the integrally formed sealing part is easier to install and maintain, effectively reducing labor costs.

[0081] like Figures 1-10 As shown, the proportional valve assembly 1 also includes a base plate 70, which includes two protruding structures 72. The two protruding structures 72 are respectively provided for the back cavity of the first proportional valve 20 and the back cavity 32 of the second proportional valve 30. The two protruding structures 72 form an interference fit with the back cavity 22 of the first proportional valve 20 and the back cavity 32 of the second proportional valve 30. The base plate 70 and the valve body shell 10 are connected by a positioning pin (not shown in the figure) and a positioning pin hole 71.

[0082] In this embodiment, the base plate 70, as a single component, simultaneously seals the back cavity 22 of the first proportional valve and the back cavity 32 of the second proportional valve, eliminating the need for multiple seals. The integrated sealing surface formed by the structural adaptation between the base plate 70 and the valve body shell 10, and the interference fit between the raised structure 72 and the two back cavities, effectively reduces fluid leakage. Furthermore, the base plate 70 and the valve body shell 10 are connected by locating pins and locating pin holes 71, making installation and disassembly relatively simple.

[0083] like Figures 1-10 As shown, the proportional valve assembly 1 also includes a cover plate 80. The valve body shell 10 is provided with seven first positioning holes 12. The cover plate 80 includes two hollow bosses 81 and seven second positioning holes 82 that correspond one-to-one with the first positioning holes 12. The inner walls of the two hollow bosses 81 are respectively provided for the valve bodies of the first proportional valve 20 and the second proportional valve 30. The first positioning holes 12 and the corresponding second positioning holes 82 are coaxially arranged and connected to each other. The cover plate 80 has a symmetrical structure in the direction of the center line connecting the first proportional valve 20 and the second proportional valve 30.

[0084] In this embodiment, the first positioning hole 12 of the valve body shell 10 corresponds one-to-one with the second positioning hole 82 of the cover plate 80 and is coaxially connected to form a rigid positioning reference, eliminating the need for repeated manual calibration during assembly. The inner walls of the two hollow bosses 81 of the cover plate 80 are precisely fitted to the valve bodies 23 of the first proportional valve and 33 of the second proportional valve, respectively, forming a surrounding limiting structure that constrains the radial displacement of the two valve bodies from the top and also isolates external impurities, protecting the core components of the proportional valve assembly 1. The symmetrical structure of the cover plate 80 along the line connecting the centers of the two proportional valves ensures no difference in left-right placement while maintaining the limiting strength of the hollow bosses 81 on the two valve bodies, improving the assembly error tolerance without affecting the core support and protection function of the cover plate 80 for the proportional valve assembly 1.

[0085] like Figures 1-10 As shown, the cover plate 80 is provided with reinforcing ribs 83 on the periphery of the hollow boss 81 and the second positioning hole 82.

[0086] In this embodiment, reinforcing ribs 83 are provided on the periphery of the hollow boss 81 and the second positioning hole 82. On the one hand, they can resist the reaction force of the valve body, avoid the limit failure caused by the deformation of the hollow boss 81, and ensure the flow control accuracy of the proportional valve assembly 1. On the other hand, they can strengthen the rigidity of the periphery structure of the second positioning hole 82 and ensure the reliability of positioning and connection.

[0087] like Figures 1-10 As shown, the proportional valve assembly 1 also includes a positioning bracket 90, wherein the positioning bracket 90 is simultaneously positioned on the first proportional valve 20 and the second proportional valve 30; the positioning bracket 90 has a symmetrical structure along the line connecting the centers of the first proportional valve 20 and the second proportional valve 30.

[0088] In this embodiment, the positioning bracket 9 can simultaneously position both valves, reducing manual assembly costs. Furthermore, when the dual proportional valves are in operation, the fluid pressure exerts a bidirectional force on the positioning bracket 90. By configuring the bracket as a symmetrical structure, deformation of one side of the bracket due to uneven force can be avoided.

[0089] like Figures 1-10As shown, the proportional valve assembly 1 also includes a pressure detection port 100, which is connected to the first proportional valve 20.

[0090] In this embodiment, the internal pressure of the proportional valve is monitored in real time through the pressure detection port 100 to ensure operational safety and flow control accuracy. Furthermore, since the cavity pressures of the first proportional valve 20 and the second proportional valve 30 are identical, only one pressure detection port 100 is required to meet the pressure monitoring needs. In this embodiment, the pressure detection port 100 is connected to the first proportional valve 20 to monitor its internal pressure. In other embodiments, the pressure detection port 100 can also be connected to the second proportional valve 30 or both proportional valves simultaneously, all achieving the effect of monitoring internal pressure. This part is prior art in this field and will not be elaborated further.

[0091] like Figures 1-10 As shown, the sealing member 50 includes a screw, and the inner wall of the machined hole 11 is formed with threads that are compatible with the screw.

[0092] In this embodiment, the machined hole 11 is removably sealed by setting a screw and threads on the inner wall of the machined hole 11, which can greatly improve the convenience of later maintenance and repair. Furthermore, the screw and the thread engagement of the machined hole 11 have radial sealing capabilities, and the tight fit between the thread teeth can prevent fluid leakage along the thread gap.

[0093] This utility model also provides a gas stove, which includes the proportional valve assembly 1 as described above.

[0094] In this embodiment, the gas stove can be controlled by a voice module (not shown in the figure), which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the gas stove to perform corresponding operations, thereby realizing intelligent control of the gas stove and improving the user experience.

[0095] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A proportional valve assembly, the proportional valve assembly comprising a valve body shell, a front cavity of a first proportional valve, a front cavity of a second proportional valve, and a proportional valve through hole connecting the two front cavities, characterized in that, A machining hole is formed on the outer surface of the valve body shell. The machining hole communicates inward to one of the front cavities. The machining hole is coaxially arranged with the through hole between the proportional valves. The diameter of the machining hole is greater than or equal to the diameter of the through hole between the proportional valves. The proportional valve assembly also includes a sealing member that seals the machining hole.

2. The proportional valve assembly as described in claim 1, characterized in that, The proportional valve assembly further includes a first flow guiding structure and / or a second flow guiding structure, wherein, The first flow guiding structure is disposed in the back cavity of the first proportional valve, and the first flow guiding structure smoothly transitions from the back cavity of the first proportional valve to the outlet of the first proportional valve. The second flow guiding structure is disposed in the back cavity of the second proportional valve, and the second flow guiding structure smoothly transitions from the back cavity of the second proportional valve to the outlet of the second proportional valve.

3. The proportional valve assembly as described in claim 1, characterized in that, The proportional valve assembly further includes a first sealing part and a second sealing part. The first sealing part is disposed corresponding to the back cavity of the first proportional valve, and the second sealing part is disposed corresponding to the back cavity of the second proportional valve. The first sealing part and the second sealing part are integrally formed.

4. The proportional valve assembly as described in claim 1, characterized in that, The proportional valve assembly also includes a base plate, which has two protruding structures. The two protruding structures are respectively provided for the back cavity of the first proportional valve and the back cavity of the second proportional valve. And / or, the two protruding structures form an interference fit with the back cavity of the first proportional valve and the back cavity of the second proportional valve, respectively; And / or, the base plate and the valve body shell are connected by a locating pin.

5. The proportional valve assembly as described in claim 1, characterized in that, The proportional valve assembly also includes a cover plate. The valve body shell is provided with a plurality of first positioning holes. The cover plate includes two hollow bosses and a plurality of second positioning holes that correspond one-to-one with the first positioning holes. The inner walls of the two hollow bosses are respectively set to the valve bodies of the first proportional valve and the valve bodies of the second proportional valve. The first positioning hole and the corresponding second positioning hole are coaxially arranged and connected to each other; And / or, the cover plate has a symmetrical structure along the line connecting the centers of the first proportional valve and the second proportional valve.

6. The proportional valve assembly as described in claim 5, characterized in that, The cover plate is provided with reinforcing ribs on the periphery of the hollow boss and / or the second positioning hole.

7. The proportional valve assembly as claimed in claim 1, characterized in that, The proportional valve assembly also includes a positioning bracket; The positioning bracket is simultaneously positioned on the first proportional valve and the second proportional valve; And / or, the positioning bracket has a symmetrical structure along the line connecting the centers of the first proportional valve and the second proportional valve.

8. The proportional valve assembly as claimed in claim 1, characterized in that, The proportional valve assembly further includes a pressure detection port, which is connected to the first proportional valve and / or the second proportional valve.

9. The proportional valve assembly as claimed in claim 1, characterized in that, The sealing element includes a screw, and the inner wall of the machined hole is formed with threads adapted to the screw.

10. A gas stove, characterized in that, The gas stove includes a proportional valve assembly as described in any one of claims 1 to 9.

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