Stopcock and gas stove comprising same

Abstract

This invention discloses a plug valve, including a rotatable valve stem connected to a position positioning mechanism. The position positioning mechanism includes a rolling element and a first valve plate. The rolling element is mounted on the valve stem to rotate synchronously with it. The valve stem rotatably passes through the first valve plate, and the rolling element abuts against the first valve plate. The first valve plate has corresponding locking holes for each position, located on the rotation trajectory of the rolling element. These locking holes allow the rolling element to engage and disengage, thereby limiting the circumferential position of the valve stem and generating a position indication when the rolling element reaches the locking hole. The position positioning mechanism of this invention has fewer components, a simpler structure, is less prone to displacement during assembly, and is repositionable and maintainable. Compared to positioning structures in related technologies, it effectively solves the technical problems of existing plug valve positioning structures having many components, complex installation, easy displacement during assembly and disassembly, and difficulty in restoration.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, and particularly relates to a plug valve and a gas stove containing the same. Background Technology

[0002] A stopcock valve is an essential component of a gas stove. Besides turning the stove on and off, it also adjusts the flame size. In related technologies, the stopcock valve's adjustment is achieved through a positioning structure that creates a limit. This structure includes a limit block and a positioning plate. The limit block has an axial limit groove, and the positioning plate has a radial through hole containing a positioning bead, a spring, and a plug. The valve stem can rotate relative to the limit block, and the positioning plate rotates with the valve stem. When the valve stem is rotated, the positioning bead rotates and becomes stuck when it enters the limit groove.

[0003] The inventors of this application have discovered that the positioning structure of the above-mentioned plug valve includes components such as a limiting groove, a positioning bead, a spring, and a plug. There are many components, making installation complicated. Furthermore, the positioning bead and spring are prone to falling out during installation and removal. Once they fall out, they are difficult to reinstall into the small radial through hole, resulting in a high scrap rate.

[0004] Therefore, the above-mentioned prior art has at least the following technical problems: the positioning structure of the plug valve in the prior art contains many components, is complicated to install, and is easy to shift during installation and removal, making it difficult to restore. Summary of the Invention

[0005] This application provides a stopcock valve and a gas stove containing the same, which solves the technical problems in the prior art where the stopcock valve positioning structure contains many components, is complex to install, and is prone to displacement during installation and removal, and is difficult to restore.

[0006] To address the aforementioned problems, this application provides a plug valve, including a rotatable valve stem connected to a position positioning mechanism. This mechanism limits the circumferential position of the valve stem when the valve stem is rotated to adjust the gas flow rate of the plug valve to a predetermined position. The position positioning mechanism includes:

[0007] Rolling elements are mounted on the valve stem to rotate synchronously with it.

[0008] The first valve plate has a valve stem that can rotate through it. The rolling element abuts against the first valve plate. The first valve plate has a locking hole corresponding to each gear position. The locking hole is located on the rotation trajectory of the rolling element and allows the rolling element to be engaged and disengaged. This limits the circumferential position of the valve stem and generates a gear position indication when the rolling element rolls to the locking hole.

[0009] Preferably, the plug valve further includes a valve core, with two symmetrically formed grooves on its end face, extending axially and facing the valve stem opening; a valve stem pin is provided on the valve stem, the valve stem pin being fixedly inserted through the valve stem radially, with both ends of the valve stem pin inserted into the corresponding grooves, so that when the valve stem rotates, the circumferential rotation and torque are transmitted to the valve core through the compression between the valve stem pin and the sidewall of the groove, thereby driving the valve core to rotate; wherein:

[0010] The valve stem pin has at least one end provided with the rolling element, which is rotatably sleeved on the valve stem pin and located between the valve core and the valve stem on the same side.

[0011] Preferably, the two ends of the rolling element along the radial direction of the valve stem slide between the inner wall surface of the valve core and the outer wall surface of the valve stem on the same side, respectively, so that the two ends of the rolling element along the radial direction of the valve stem are limited by the inner wall surface of the valve core and the outer wall surface of the valve stem, respectively.

[0012] Preferably, a guide plate is fixed on the inner end of the valve stem. The guide plate, valve core, and valve stem are coaxially arranged. The guide plate is rotatably arranged inside the valve core, and the outer periphery of the guide plate slides with gaps on the inner wall surface of the valve core, thereby ensuring that the valve stem is always concentric with the valve core.

[0013] Preferably, a valve core spring is sandwiched between the inner end of the valve stem and the valve core, and the valve core spring compresses the valve stem, thereby forcing the roller to press against the first valve plate;

[0014] A positioning plate is also fixedly fitted on the valve stem. A valve stem spring fitted on the valve stem is sandwiched between the positioning plate and the first valve plate. The valve stem spring compresses the first valve plate so that the first valve plate is pressed against the roller.

[0015] Preferably, the plug valve further includes a valve blank, with the valve core rotatably disposed inside the valve blank. The valve blank is provided with an air inlet for connecting to a gas source, a main air outlet for connecting to the outer burner cap, and a secondary air outlet for connecting to the inner burner cap. The valve core is connected to the air inlet, and the valve core is provided with a row of external vent holes with successively varying diameters and a row of internal vent holes with the same diameter along the circumferential direction.

[0016] When the valve stem is rotated, the external vent holes of different diameters connect sequentially with the main outlet on the valve blank, and the internal vent holes connect sequentially with the auxiliary outlet. The gas flow rate output through the main outlet changes accordingly, and the rolling element is engaged in the corresponding locking hole, thereby adjusting the gear.

[0017] Preferably, the first valve plate is fixed on the valve blank, and the plug valve further includes a child lock that can lock or unlock the valve stem as the valve stem moves axially, the child lock comprising:

[0018] Insert, which is fixedly connected to the valve blank;

[0019] A socket is provided on the positioning plate. The socket extends along the valve stem axis and is opposite to the plug-in. It can be inserted into or removed from the plug-in as the valve stem moves axially.

[0020] The socket has a first position and a second position as it moves axially with the valve stem. When the socket is in the first position, it is fitted over the insert, restricting the circumferential rotation of the valve stem. When the socket is in the second position, it separates from the insert, the circumferential restriction is released, and the valve stem can rotate.

[0021] Preferably, the rolling element is a rolling column, the locking port is a rectangular hole penetrating the first valve plate, and the width of the rectangular hole along the circumference of the valve stem is narrower than the diameter of the rolling column.

[0022] Alternatively, the rolling element is a ball bearing, and the locking port is a circular hole penetrating the first valve plate, with the diameter of the circular hole being smaller than the diameter of the rolling column.

[0023] Preferably, the stopcock valve further includes a gear position sensing component for collecting gas stove gear position information. The gear position sensing component includes a Hall switch and a magnetic induction block for identifying the valve stem gear position. There is magnetic induction between the Hall switch and the magnetic induction block. The magnetic induction block is synchronously rotatably connected to the valve stem, and:

[0024] The Hall switch and the magnetic induction block are integrated in the same housing, and the gear position sensing assembly has a third through hole through which the valve stem passes.

[0025] More preferably, the magnetic induction block is disposed on the gear position sensing block, and the housing is sleeved on the valve stem, allowing the valve stem to rotate relative to it. The housing includes an upper housing and a lower housing, which are fastened together to form a cavity for accommodating the Hall switch and the gear position sensing block. The Hall switch is fixedly disposed in the lower housing, and the gear position sensing block is rotatably disposed between the upper housing and the Hall switch. The gear position sensing block is keyed to the valve stem to rotate synchronously with the valve stem.

[0026] Secondly, embodiments of this application also provide a gas stove, which includes the aforementioned stopcock valve.

[0027] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0028] (1) The gear positioning mechanism of the present invention includes only rollers and a first valve plate, with fewer parts and a simple structure. In addition, the rollers are set on the valve stem, which are not easy to move during assembly, and can be reset and repaired. Compared with the positioning structure in related technologies, it has the advantages of convenient processing, convenient installation, low cost, reset and repair. It effectively solves the technical problems of the existing plug valve positioning structure containing many parts, complicated installation, easy displacement during installation and removal, and difficulty in restoration.

[0029] (2) Since the roller is rotatably mounted on the valve pin, it will rotate around the valve pin while revolving with the valve stem. This makes the roller roll friction when moving on the first valve plate, resulting in very little resistance, clear gear position, smoother gear adjustment, and better feel. This effectively solves the technical problem that the positioning structure of the existing plug valve is all sliding friction, which leads to unclear gear position and large operating torque.

[0030] (3) The rollers are radially limited by the cooperation between the outer wall of the valve stem and the inner wall of the valve core, axially limited by the cooperation between the valve core spring and the valve stem spring, and centrally positioned by the guide plate. The positioning is accurate and the rollers will always rotate tangentially on the surface of the first valve plate and accurately fit into each locking port without deviation. The product has good precision and the gas flow of each gear is very consistent. It can be adapted to fully premixed gas stoves and effectively solves the technical problems of insufficient precision and poor gas flow consistency of each gear when the plug valve is used in fully premixed gas stoves in the existing technology.

[0031] (4) Existing valve cores need to be made relatively thick, while the rollers in this invention rely on the inner wall of the valve core for positioning, which is just right for thicker valve cores. At the same time, the rollers and the first valve plate can use the original valve core spring to achieve axial tight contact, so that fewer additional positioning components are needed, which can reduce costs and assembly difficulty. This effectively solves the technical problem that the positioning structure of the plug valve in the prior art needs to be set up separately, resulting in high costs and increased assembly difficulty.

[0032] (5) When the child lock is released by pressing down, the roller will move forward along the valve stem axis. At this time, the roller is disengaged from the jamming port, so that there is no positioning torque when rotating the valve stem. The start is easy and effortless, which effectively solves the technical problem of large starting torque of the plug valve in the prior art.

[0033] (6) The plug valve is equipped with a gear sensing component for collecting gas stove gear information. The Hall switch and magnetic induction block of the gear sensing component are integrated in the same housing. Compared with the prior art where the Hall switch and magnetic induction block are assembled separately in the plug valve, the integrated setting can be an independent component and can be tested for effectiveness independently of the valve body. After the test is qualified, it is installed into the valve body, which is convenient for quality control. It effectively solves the technical problem that the gear signal device for collecting gas stove gear information in the prior art can only be tested after being installed in the valve body as a separate component. If the test fails, rework is required, resulting in high testing costs and time and labor. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the plug valve in the first embodiment of the present invention;

[0035] Figure 2 This is an exploded view of the plug valve in the first embodiment of the present invention;

[0036] Figure 3 This is a top view of the plug valve in the first embodiment of the present invention;

[0037] Figure 4 for Figure 3 Sectional view along the middle AA direction;

[0038] Figure 5 for Figure 4 Sectional view along the FF direction;

[0039] Figure 6 This is an exploded view of the gear positioning mechanism of the plug valve in the second embodiment of the present invention;

[0040] Figure 7 This is a schematic diagram of the overall structure of the valve position positioning mechanism in the second embodiment of the present invention;

[0041] Figure 8 This is a cross-sectional view of the plug valve in the second embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the overall structure of the plug valve in the third embodiment of the present invention;

[0043] Figure 10 This is an exploded view of the plug valve in the third embodiment of the present invention;

[0044] Figure 11 This is a top view of the plug valve in the third embodiment of the present invention;

[0045] Figure 12 for Figure 11 A sectional view along the EE direction;

[0046] Figure 13 This is an exploded view of the gear position sensing component of the plug valve in the third embodiment of the present invention;

[0047] Figure 14 This is a cross-sectional view of the position sensing component of the plug valve in the third embodiment of the present invention. Detailed Implementation

[0048] This application provides a stopcock valve and a gas stove containing the same, which solves the technical problems in the prior art where the stopcock valve positioning structure contains many components, is complex to install, and is prone to displacement during installation and removal, and is difficult to restore.

[0049] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0050] Figures 1-5The first embodiment of the plug valve is shown. The plug valve includes a valve blank 100 and a valve core 200 rotatably disposed within the valve blank 100. The valve blank 100 is provided with an air inlet 130, a main air outlet 110, and a secondary air outlet 120. The air inlet 130 is used to connect to an air inlet pipe, the main air outlet 110 is used to connect to the outer flame cap of the burner, and the secondary air outlet 120 is used to connect to the inner flame cap (the burner includes an outer flame cap and an inner flame cap; the outer flame cap is used to form an outer flame, and the inner flame cap is used to form an inner flame). The valve core 200 communicates with the air inlet 130. The valve core 200 is provided with a row of external vent holes 220 with successively varying diameters and another row of internal vent holes 230 with the same diameter along its circumference. The inner end of the valve stem 300 is rotatably connected to the valve core 200, and the outer end is connected to a knob. The valve stem 300 is also connected to a position positioning mechanism. Turning the knob causes the valve stem 300 to rotate the valve core 200. Under the limiting action of the gear positioning mechanism, the external vents 220 of different diameters are connected to the main gas outlet 110 on the valve blank 100 in sequence, and the internal vents 230 are connected to the auxiliary gas outlet 120 in sequence. As a result, the gas flow rate output through the main gas outlet 110 changes accordingly, and the size of the outer flame of the burner changes synchronously, thereby adjusting the gear of the gas stove.

[0051] The inner end of the valve stem 300 has a radially through hole, through which the valve pin 310 passes and is connected by a radial screw 360 (see...). Figure 10 The valve pin 310 is fixed to the valve stem 300. Symmetrical slots 210 are formed on the end face of the valve core 300, extending axially along the valve core 300. Both ends of the valve pin 310 are inserted into the slots 210, so that when the valve stem 300 rotates, the circumferential rotation and torque are transmitted to the valve core 200 through the compression between the valve pin 310 and the side wall of the slot 210, thereby driving the valve core 200 to rotate. Additionally, the valve pin 310 can move axially within the slot 210. The valve pin 310 can be directly selected from bearing shafts, offering strong versatility.

[0052] The gear positioning mechanism includes a pair of rollers 410 rotatably sleeved on both ends of the valve pin 310. The rollers 410 are clearance-fitted with the valve pin 310, and the inner end of the rollers 410 is limited by the outer wall surface of the valve stem 300, while the outer end of the rollers 410 is limited by the inner wall surface of the valve core 200. This allows the rollers 410 to be positioned radially along the valve stem 300 as the valve stem 300 rotates circumferentially.

[0053] The gear positioning mechanism also includes a first valve plate 500, which has a first through hole 510 in its center. The valve stem 300 rotatably passes through the first through hole 510, and the first valve plate 500 is fixed to the valve blank 100 by a first screw so that the first valve plate 500 is in close contact with the roller 410. The first valve plate 500 has locking holes 521 around the first through hole 510. Each locking hole 521 is located on the same virtual circle with the center of the first through hole 510 as the center, and each locking hole 521 is located on the rotation trajectory of the roller 410 in the circumferential direction. The width of the locking hole 521 in the circumferential direction of the first through hole 510 is smaller than the diameter of the roller 410, so that the roller 410 can be locked in or locked out. The valve stem 300 drives the roller 410 to rotate on the first valve plate 500. When the roller 410 rotates to the stop port 521, it can limit the circumferential rotation position of the valve stem 300 and generate a stop feeling (gear position indication feeling). At this time, an external vent 220 is connected to the main air outlet 110 on the valve blank 100, and an internal vent 230 is connected to the auxiliary air outlet 120, thus forming gear adjustment.

[0054] Of course, the gear positioning mechanism can also be equipped with only one roller 410, which is located on either end of the valve pin 310.

[0055] A valve core spring 320 is sandwiched between the inner end of the valve stem 300 and the valve core 200. On one hand, the valve core spring 320 compresses the valve core 200, causing the valve core 200 to press against the valve blank 100, thereby eliminating the gap between the valve core 200 and the valve blank 100 to prevent oil leakage. On the other hand, the valve core spring 320 compresses the valve stem 300, thereby forcing the roller 410 to press against the first valve plate 500. In this embodiment, a groove for accommodating the valve core spring 320 is provided on the inner end of the valve stem 300.

[0056] A positioning piece 600 is also fixedly sleeved on the valve stem 300. A valve stem spring 340, sleeved on the valve stem 300, is sandwiched between the positioning piece 600 and the first valve plate 500. The valve stem spring 340 presses against the first valve plate 500, so that it abuts against the roller 410. The combined force of the valve stem spring 340 and the valve core spring 320 makes the roller 410 and the first valve plate 500 in close contact, thereby ensuring effective cooperation between the roller 410 and the locking port 521.

[0057] In addition, a guide plate 330 is riveted to the inner end of the valve stem 300. The guide plate 330, the valve core 200, and the valve stem 300 are coaxially arranged. The guide plate 330 rotates within the valve core 200, and the outer periphery of the guide plate 330 can slide with gaps on the inner wall surface of the valve core 200, thereby ensuring that the valve stem 300 is always concentric with the valve core 200.

[0058] In this embodiment, the locking port 521 is a rectangular hole that penetrates the first valve plate 500. The roller 410 is inserted to a deeper depth, providing a sufficient locking sensation and a better feel.

[0059] A rectangular coordinate system is established with the center of the first through hole 510 as the origin and the contact position between the first valve plate 500 and the roller 410 when the valve stem 300 is in the closed state as the terminal side of the first quadrant. The plane containing the first valve plate 500 is divided into four quadrants. The first valve plate has eight locking points 521 at 180°, 210°, 240°, 270°, and symmetrically at 0°, 30°, 60°, and 90° from the origin. The first valve plate is smooth in the second and fourth quadrants. The longer end of the valve pin 310 extends onto the valve blank 100, and the valve blank 100 has a first support 140 and a second support 150 at corresponding positions at 90° and 300°, respectively. The longer end of the valve pin 310 exposed on the valve stem 300 rotates between the first support 140 and the second support 150, thus forming five adjustment levels, as detailed below:

[0060] The valve stem 300 rotates counterclockwise from 90° to 180°, and the two rollers 410 are respectively locked in the locking holes 521 at 180° and 0°. The first external vent 220 is connected to the main vent 110, and the first internal vent 230 is connected to the auxiliary vent 120. The plug valve is in the first position.

[0061] When the valve stem rotates counterclockwise from 180° to 210°, the two rollers 410 are respectively locked in the locking holes 521 at 210° and 30°. The second external vent 220 is connected to the main vent 110. The second internal vent 230 is connected to the auxiliary vent 120. The plug valve is in the second position.

[0062] When the valve stem 300 rotates counterclockwise from 210° to 240°, the two rollers 410 are respectively locked in the locking holes 521 at 240° and 60°. The third vent hole is connected to the main vent 110. The third internal vent hole 230 is connected to the auxiliary vent 120. The plug valve is in the third position.

[0063] When the valve stem 300 rotates counterclockwise from 240° to 270°, the two rollers 410 are respectively locked in the locking holes 521 at 270° and 90°. The fourth vent is connected to the main vent 110, and the fourth internal vent 230 is connected to the auxiliary vent 120. The plug valve is in the fourth position.

[0064] When the valve stem 300 is rotated counterclockwise from 270° to 300°, the valve pin 310 is exposed at the longer end of the valve stem and abuts against the second backing 150. The air outlet is not connected, and the fifth internal vent 230 is connected to the auxiliary air outlet 120. Only the internal flame is present, and the plug valve is in the fifth position.

[0065] Rotating the valve stem 300 clockwise to 90°, the valve pin 310 protrudes from the longer end of the valve stem 300 and abuts against the first retainer 140. The valve stem 300 is in the closed state, and the plug valve is closed. Figure 5 As shown.

[0066] In summary, the gear positioning mechanism of the present invention includes only roller 410 and first valve plate 500, with fewer components and a simpler structure. In addition, roller 410 is set on valve stem 300, which makes it less prone to displacement during assembly, and it can be reset and repaired. Compared with the positioning structure in related technologies, it has the advantages of convenient processing, convenient installation, low cost, reset capability, and repairability. It effectively solves the technical problems of existing plug valve positioning structures containing many components, complex installation, easy displacement during assembly and disassembly, and difficulty in restoration.

[0067] Furthermore, since the roller 410 is rotatably mounted on the valve pin 310, it will rotate around the valve pin 310 while revolving with the valve stem. This makes the roller 410 roll friction when moving on the first valve plate 500, resulting in very low resistance, clear gear positions, smoother gear adjustment, and better feel. This effectively solves the technical problem in the prior art where the positioning structure of the plug valve is all sliding friction, which leads to unclear gear positions and high operating torque.

[0068] Furthermore, the roller 410 is precisely positioned by the radial limit provided by the cooperation between the outer wall of the valve stem 300 and the inner wall of the valve core 200, the axial limit provided by the cooperation between the valve core spring 320 and the valve stem spring 340, and the center positioning provided by the guide plate 330. It will always rotate tangentially on the surface of the first valve plate 500 and accurately engage in each locking port 521 without deviation. The product has good precision and consistent gas flow at each setting, making it suitable for fully premixed gas stoves. It effectively solves the technical problems of insufficient precision and poor gas flow consistency at each setting when the plug valve is used in fully premixed gas stoves in the existing technology.

[0069] Furthermore, in existing technologies, the rotary valves used in atmospheric gas stoves do not require high accuracy in gas flow rate at each setting. However, in fully premixed gas stoves, the stove is equipped with a gas pressure regulator. Typically, the power and fan speed at each setting are fixed, necessitating high accuracy in the gas flow rate. A larger valve core circumference makes flow rate control easier, thus requiring a relatively thicker valve core. In this invention, the roller 410 relies on the inner wall of the valve core 200 for positioning, which is well-suited for the thicker valve core 200. Simultaneously, the roller 410 and the first valve plate 500 can achieve axial tight contact using the existing valve core spring 320, reducing the need for additional positioning components, lowering costs and assembly difficulty. This effectively solves the technical problem in existing rotary valves where the additional positioning components increase costs and assembly difficulty.

[0070] The plug valve also includes a child lock, which comprises a positioning plate 600 and a second valve plate 900. The second valve plate 900 has a second through hole 350 through which the valve stem 300 rotatably passes. The second valve plate 900 is fixed to the first valve plate 500 by a second screw. The positioning plate 600 has a socket 610 extending axially along the valve stem 300, and the second valve plate 900 has a plug 620 that can be inserted into or removed from the socket 610. When the valve stem 300 is in the closed state, the plug 620 is inside the socket 610, restricting the circumferential rotation of the valve stem 300. To open the plug valve, the valve stem 300 must first be pressed inward, compressing the valve core spring 320 into the valve, moving the socket 610 away from the plug 620, separating the plug 620 from the socket 610, releasing the circumferential restriction, and allowing the valve stem 300 to rotate, effectively preventing accidental triggering of the knob.

[0071] In existing plug valves, the starting process requires overcoming the resistance provided by the positioning groove to the positioning element. For example, plug valves that rely on the positioning ball and positioning groove for positioning need to overcome the resistance provided by the positioning groove to the positioning ball to start, while plug valves with slot-type positioning need to overcome the resistance provided by the slot to start. In this invention, when the child lock is released by pressing down, the roller 410 moves forward axially with the valve stem 300. At this time, the roller 410 disengages from the locking port 521, thus eliminating the positioning torque when rotating the valve stem 300. This results in smooth and effortless starting, effectively solving the technical problem of high starting torque in existing plug valves.

[0072] In such Figures 6-8 In the second embodiment shown, the plug valve uses a ball 420 instead of the roller 410 in the first embodiment. Correspondingly, the locking port 521 is a circular hole that passes through the first valve plate 500 to fit the ball 420, and the diameter of the ball 420 is larger than the diameter of the circular hole.

[0073] In addition, in the second embodiment, a positioning ring 350 is provided between the valve stem spring 320 and the first valve plate 500. The positioning ring 350 is sleeved on the valve stem, the valve stem spring 320 abuts against the first valve plate 500 through the positioning ring 350, and the valve pin 310 is fixed to the valve stem 300 by riveting.

[0074] In such Figures 9-14In the third embodiment shown, the rotary valve further includes a gear position sensing component 800 for collecting gas stove gear position information. The gear position sensing component 800 includes a Hall switch 830 and a magnetic induction block 821 for identifying the gear position of the valve stem 300. There is magnetic induction between the Hall switch 830 and the magnetic induction block 821. The magnetic induction block 821 is disposed on the gear position sensing block 820 and is keyed to the valve stem 300 to rotate synchronously with the valve stem 300. The magnetic induction block 821 rotates relative to the Hall switch 830. When the valve stem 300 rotates, the position of the magnetic induction block 821 changes, and the magnetic flux sensed by the Hall switch 830 changes accordingly.

[0075] By comparing the change in magnetic flux sensed by the Hall switch 830 with the position of the valve stem 300, and combining this with algorithms that scientifically compare the rate of change of magnetic flux, the amount of data change, and the magnitude of change, a correspondence between the change in magnetic flux and the position, angle, and operating state of the valve stem 300 is established. Subsequently, the Hall switch 830 transmits the data to the main controller, which can then determine the current valve position based on the change in magnetic flux.

[0076] In this embodiment, the Hall switch 830 and the gear position sensing block 820 with magnetic induction block 821 are integrated in the same housing. Compared with the prior art where the Hall switch and magnetic induction block are assembled separately in the stopcock valve, the integrated setting can be an independent component and can be tested for effectiveness independently of the valve body. After the test is passed, it is installed into the valve body, which facilitates quality control. It effectively solves the technical problem in the prior art where the gear position signal device for collecting gas stove gear position information is installed separately in the valve body before the signal can be tested. If the test fails, rework is required, resulting in high testing costs and time and labor.

[0077] like Figures 13-14 As shown, the housing includes an upper housing 810 and a lower housing 840. The upper housing 810 and the lower housing 840 are snapped together to form a cavity for accommodating a Hall switch 830 and a gear position sensing block 820. The Hall switch 830 is fixedly disposed in the lower housing 840, and the gear position sensing block 820 is rotatably disposed between the upper housing 810 and the Hall switch 830. The entire gear position sensing assembly 800 has a third through hole in the center for the valve stem 300 to pass through.

[0078] To install the gear position sensing component 800, the plug valve also includes a third valve plate 700. The third valve plate 700 is disposed between the first valve plate 500 and the second valve plate 900 and is fixed to the first valve plate 500 by screws. The valve stem 300 passes through the center of the third valve plate 700 and can rotate around the third valve plate 700. The gear position sensing component 800 passes through the valve stem 300 and is clamped between the second valve plate 900 and the third valve plate 700.

[0079] In addition, since the second valve plate 900 is close to the positioning piece 600, in this embodiment, the plug-in 620 is disposed on the second valve plate 900; and since the third valve plate 700 is located on the outermost layer, the second through hole 350 is disposed on the third valve plate 700.

[0080] The plug valve in any embodiment of the present invention may be equipped with a flameout protection device or may not be equipped with a flameout protection device.

[0081] The plug valve of any embodiment of the present invention can be used in gas stoves, including tabletop gas stoves, built-in gas stoves, and integrated stoves.

[0082] In this embodiment, axial direction refers to the direction along or parallel to the central axis of the valve stem 300, radial direction refers to the direction of the diameter of the cross-section of the valve stem 300, circumferential direction refers to the direction around the central axis, and symmetry refers to symmetry about the central axis.

[0083] It should be understood that although quantifiers such as "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are used merely to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit.

[0084] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0085] The above description is merely a preferred embodiment of this application and does not constitute any limitation on this application in any form or substance. It should be noted that those skilled in the art can make several improvements and additions without departing from the method of this application, and these improvements and additions should also be considered within the scope of protection of this application. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of this application are equivalent embodiments of this application; furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this application still fall within the scope of the technical solution of this application.

Claims

1. A plug valve, characterized in that, Includes a rotatable valve stem, the valve stem being connected to a position positioning mechanism to limit the circumferential position of the valve stem when the valve stem is rotated to adjust the gas flow rate of the plug valve to a predetermined position, the position positioning mechanism comprising: Rolling elements are mounted on the valve stem and rotate synchronously with the valve stem. The first valve plate, through which the valve stem can rotate relative to, the rolling element abuts against the first valve plate, and the first valve plate is provided with a locking hole corresponding to each gear position. The locking hole is located on the rotation trajectory of the rolling element, and the locking hole allows the rolling element to be engaged and disengaged, thereby limiting the circumferential position of the valve stem and generating a gear position indication when the rolling element rolls to the locking hole. The plug valve further includes a valve core, with two symmetrical slots on its end face, extending axially and facing the valve stem opening. A valve stem pin is provided on the valve stem, fixedly passing through it radially. Both ends of the valve stem pin are inserted into corresponding slots, so that when the valve stem rotates, the circumferential rotation and torque are transmitted to the valve core through the compression between the valve stem pin and the sidewall of the slot, thereby driving the valve core to rotate. Wherein: The valve stem pin has at least one end provided with the rolling element, which is rotatably sleeved on the valve stem pin and located between the valve core and the valve stem on the same side.

2. The plug valve as described in claim 1, characterized in that, The two ends of the rolling element along the radial direction of the valve stem slide between the inner wall of the valve core and the outer wall of the valve stem on the same side, respectively, so that the two ends of the rolling element along the radial direction of the valve stem are limited by the inner wall of the valve core and the outer wall of the valve stem, respectively.

3. The plug valve as described in claim 1, characterized in that, A guide plate is fixed on the inner end of the valve stem. The guide plate, valve core, and valve stem are coaxially arranged. The guide plate is rotatably arranged inside the valve core, and the outer periphery of the guide plate slides with gaps on the inner wall surface of the valve core, thereby ensuring that the valve stem is always concentric with the valve core.

4. The plug valve as described in claim 1, characterized in that, A positioning plate is also fixedly sleeved on the valve stem. A valve stem spring, which is sleeved on the valve stem, is sandwiched between the positioning plate and the first valve plate. The valve stem spring compresses the first valve plate so that the first valve plate presses against the rolling element.

5. The plug valve as described in claim 1, characterized in that, The rolling element is a rolling column, and the locking port is a rectangular hole that passes through the first valve plate, wherein the width of the rectangular hole along the circumference of the valve stem is narrower than the diameter of the rolling column.

6. The plug valve as claimed in claim 1, characterized in that, The rolling element is a ball bearing, and the locking port is a circular hole that passes through the first valve plate, and the diameter of the circular hole is smaller than the diameter of the ball bearing.

7. The plug valve as described in claim 1, characterized in that: The rotary valve also includes a gear position sensing component for collecting gas stove gear position information. The gear position sensing component includes a Hall switch and a magnetic induction block for identifying the valve stem gear position. There is magnetic induction between the Hall switch and the magnetic induction block. The magnetic induction block is synchronously rotatably connected to the valve stem, and: The Hall switch and the magnetic induction block are integrated into the same housing.

8. The plug valve as described in claim 7, characterized in that: A magnetic induction block is mounted on a gear position sensor block, and a housing is fitted onto the valve stem, allowing the valve stem to rotate relative to it. The housing includes an upper housing and a lower housing, which are fastened together to form a cavity for accommodating a Hall switch and a gear position sensor block. The Hall switch is fixedly mounted inside the lower housing, and the gear position sensor block is rotatably mounted between the upper housing and the Hall switch. The gear position sensor block is keyed to the valve stem.

9. A gas stove, characterized in that: Including the plug valve as described in any one of claims 1 to 8.

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