A stopcock valve

Abstract

The utility model discloses a cock valve, including the valve body, the valve body is equipped with at least the valve rod of top end protruding valve body existence, the valve body is equipped with still the pulse structure subassembly of covering on the valve rod, and the top opening end of valve body is equipped with the sealing structure in the valve body between valve rod. This cock valve can set up pulse structure subassembly and sealing structure in the valve body, can avoid the influence of the outside harsh environment, guarantees the use effect and service life.

Description

Technical Field

[0001] This utility model relates to the technical field of gas valves used in commercial stoves, specifically a commercial high-flow gas rotary valve. Background Technology

[0002] A plug valve is a common gas control valve used to regulate and cut off gas flow. High-flow commercial gas plug valves are used in industrial boilers, generator sets, large kitchens, and other environments with high levels of dust, dirt, or liquid, resulting in harsh operating conditions. However, the pulse switches of most commercial high-flow gas plug valves are designed as external structures, meaning they are located outside the valve body and exposed. Prolonged use in such harsh environments directly affects their performance and lifespan.

[0003] Furthermore, for commercial high-flow gas plug valves, since a retaining sleeve is nested between the valve body top opening and the valve stem, the sealing structure between the valve stem and the valve body top opening is generally attached to the end face of the valve body top opening and is located outside the valve body. The sealing structure is generally constructed as a conical sealing sleeve with a diameter that gradually decreases from the lower end to the upper end. This type of sealing structure uses a lot of sealing material, which is not cheap, and the whole structure is exposed to the outside. Therefore, long-term use will directly affect the performance and service life. Utility Model Content

[0004] The purpose of this invention is to provide a plug valve that at least partially solves the above-mentioned problems.

[0005] This utility model provides the following technical solution: a plug valve, including a valve body, wherein the valve body is provided with at least one valve stem extending out of the valve body, and the valve body is also provided with a pulse structure assembly sleeved on the valve stem, and a sealing structure located inside the valve body is provided between the top opening end of the valve body and the valve stem.

[0006] Preferably, the valve body includes a valve body, a connecting body, and a valve cover. The connecting body is installed on the top of the valve body, and the valve cover is installed on the top of the connecting body. A fixing plate is also installed between the connecting body and the valve cover. The pulse structure assembly is limited and fitted between the fixing plate and the valve cover. The sealing structure is located between the top opening of the valve cover and the valve stem and is located inside the valve cover.

[0007] Preferably, the pulse structure assembly includes a stationary contact seat, a moving contact piece, and a spring sleeved on the valve stem. The stationary contact seat is disposed on a fixed plate and located below the moving contact piece. The valve stem is provided with an upper axial limiting structure and a lower axial limiting structure. The upper end of the spring abuts against the upper axial limiting structure, and the lower end of the spring abuts against the moving contact piece and presses it against the lower axial limiting structure. When the valve stem is pressed down, the moving contact piece can contact the stationary contact seat to realize the connection of the pulse switch.

[0008] Preferably, the upper axial limiting structure includes an upper limiting plate fitted onto the valve stem, and the lower axial limiting structure includes a limiting step formed on the valve stem.

[0009] Preferably, the upper axial limiting structure further includes a retaining ring (retaining spring) clamped on the valve stem, the upper limit plate being abutted by the spring to press against the bottom of the retaining ring, and the outer diameter of the retaining ring being smaller than the outer diameter of the upper limit plate.

[0010] Preferably, the static contact seat includes a static contact body and a housing arranged around the static contact body. The top of the static contact body is lower than the top of the housing, and the outer diameter of the moving contact piece is smaller than the inner diameter of the housing. The moving contact piece can contact the static contact seat when the valve stem is pressed down to realize the connection of the pulse switch.

[0011] Preferably, the top of the static contact body is configured as a convex structure that can form a line contact with the moving contact piece.

[0012] Preferably, the convex structure forms a first inclined surface and a second inclined surface, which are connected at the top by a circular arc transition.

[0013] Preferably, the valve cover has two symmetrical connecting posts on its outer side wall, and the two connecting posts have connecting holes for connection with the stove panel.

[0014] Preferably, a connecting block is integrally formed on the outer side wall of the bottom of the valve body, and a ground wire connection hole is provided on the connecting block.

[0015] Preferably, the valve cover has a reduced diameter end at the top, the reduced diameter end is slidably engaged with the valve stem, and the sealing structure is configured as a sealing ring with a circular cross-section, the sealing ring being embedded in the reduced diameter end and / or the valve stem side wall.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the plug valve, pulse switch and sealing structure of this utility model are all set inside the valve body, thereby realizing the built-in setting and avoiding the external setting in the prior art. Thus, even in harsh operating environments, the performance can still be guaranteed and the service life can be extended. Attached image description: Figure 1 This is a three-dimensional structural diagram of the plug valve of this utility model; Figure 2 This is a partial cross-sectional view of the plug valve of this utility model.

[0017] In the diagram: 1. Valve stem; 2. Valve body; 3. Connecting body; 4. Valve cover; 41. Reduced diameter end; 5. Fixing plate; 6. Sealing ring; 7. Static contact seat; 8. Moving contact piece; 9. Spring; 10. Upper limit plate; 11. Limiting step; 12. Snap ring; 13. Static contact body; 14. Housing; 15. Snap groove; 16. Connecting terminal; 17. First inclined surface; 18. Second inclined surface; 19. Arc; 20. Connecting column; 21. Connecting hole; 22. Connecting block; 23. Ground wire connection hole. Valve body 100. Detailed Implementation

[0018] The technical solutions of specific embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the teachings of the following embodiments are within the protection scope of this utility model.

[0019] Specifically, the detailed structure of the plug valve of this utility model is described in detail below with reference to embodiments.

[0020] Reference Figure 1-2 This embodiment proposes a plug valve, which includes a valve body 100. The valve body 100 has a valve core mounting cavity (not shown), and a valve core (not shown) that can rotate under the rotation of the valve stem 1 is housed within the valve core mounting cavity. The valve core has various vent holes, including a flame-retardant vent hole. The valve body 100 is an assembly of multiple components, basically including a valve body 2, a connecting body 3, and a valve cover 4. The connecting body 3 is mounted on the top of the valve body 2, and the valve cover 4 is mounted on the top of the connecting body 3. A fixing plate 5 is also installed between the connecting body 3 and the valve cover 4. The portion of the valve stem 1 located within the valve body 100 moves primarily within the valve cover 4 and the connecting body 3.

[0021] The valve body 100 is provided with a pulse structure assembly and a sealing structure. Specifically, in this embodiment, the pulse structure assembly is limited and fitted between the fixing plate 5 and the valve cover 4, while the sealing structure is constructed between the top opening end of the valve cover 4 and the valve stem 1 and is located inside the valve cover 4.

[0022] By setting the valve cover 4, this utility model allows the pulse structure assembly and sealing structure to be placed inside the valve body 100, avoiding the need for external installations of the pulse structure assembly and sealing structure, i.e., placement outside the valve body 100. This prevents the impact of harsh external environments on the pulse structure assembly and sealing structure, ensuring performance and extending service life.

[0023] It should be noted that in this embodiment, the top opening end of the valve cover 4 is configured as a reduced-diameter end 41, which slides with the valve stem 1. The sealing structure is configured as a circular cross-section sealing ring 6, which is embedded in the side wall of the valve stem 1 and is entirely located within the valve body 100, without protruding from the valve body 100. Therefore, a retaining sleeve is no longer provided between the reduced-diameter end 41 and the valve stem 1, and a sliding fit is formed between them with a very small gap. Thus, the sealing structure can be placed on the side wall of the valve stem, and a circular cross-section sealing ring 6 can be used instead of the existing conical sealing sleeve. The circular cross-section sealing ring 6 is a conventional sealing component, easy to procure, and, more importantly, much smaller in size than the conical sealing sleeve. This saves material and naturally lowers procurement costs. Furthermore, since it is entirely inside the valve body 100, it is not affected by harsh external environments.

[0024] Of course, in other embodiments, the sealing ring 6 can also be embedded on the inner wall of the reduced diameter end 41, or it can be embedded on both the valve stem 1 and the reduced diameter end 41. All three embedding methods can achieve the sealing effect. Embedding the valve stem 1 makes it easy to install the sealing ring 6 and prevents it from falling off.

[0025] In this embodiment, the pulse structure component is implemented using the following structure: specifically, the pulse structure component includes a stationary contact seat 7, a moving contact piece 8, and a spring 9 fitted onto the valve stem 1. The stationary contact seat 7 is located on the fixed plate 5 and below the moving contact piece 8. The valve stem 1 has an upper axial limiting structure and a lower axial limiting structure. The upper end of the spring 9 abuts against the upper axial limiting structure, and the lower end of the spring 9 abuts against the moving contact piece 8 and presses it against the lower axial limiting structure. When the valve stem 1 is pressed down, the moving contact piece 8 can contact the stationary contact seat 7 to achieve the connection of the pulse switch. In this embodiment, the stationary contact seat 7, the moving contact piece 8, and the spring 9 are all arranged in a ring shape to fit onto the valve stem 1.

[0026] In this embodiment, the moving contact piece 8 is above the stationary contact seat 7. When the valve stem 1 is pressed down, the upper axial limiting structure, the lower axial limiting structure, the spring 9, and the moving contact piece 8 move down with the valve stem 1 until the moving contact piece 8 contacts the stationary contact seat 7. The two then make contact, and the pulse switch is turned on. At this time, the valve stem 1 continues to be pressed down. Under the action of the spring 9, the moving contact piece 8 always remains in contact with the stationary contact seat 7. Then, when the valve stem 1 is released, the valve stem 1 rises back. At this time, the moving contact piece 8 disengages from the stationary contact seat 7. Under the action of the spring 9, the moving contact piece 8 returns to its original position and is continued to be abutted and pressed against the lower axial limiting structure by the spring 9.

[0027] Specifically, the upper axial limiting structure includes an upper limit plate 10 fitted onto the valve stem 1; the lower axial limiting structure includes a limiting step 11 formed on the valve stem 1, the limiting step 11 being annular and disposed on the outer side wall of the valve stem 1. The spring is then fitted onto the valve stem 1 and located between the upper limit plate 10 and the moving contact piece 8. Using the limiting step 11 to form the lower axial limiting structure facilitates processing and simplifies the limiting structure, eliminating the need for additional components.

[0028] In this embodiment, the upper axial limiting structure further includes a retaining ring (retaining spring) 12 that is locked on the valve stem 1. The upper limit plate 10 is pressed against the bottom of the retaining ring 12 by the spring 9. The outer diameter of the retaining ring 12 is smaller than the outer diameter of the upper limit plate 10.

[0029] The outer diameter of the upper limit plate 10 can be several times larger than that of the retaining ring 12, and its radial extension length can be long enough to provide sufficient contact area for the spring 9, ensuring reliable contact. The retaining ring 12 serves two purposes: firstly, it has a notch compared to the upper limit plate 10, allowing it to be easily snapped onto the valve stem 1; secondly, the retaining ring 12 provides axial restraint on the upper limit plate 10, preventing it from dislodging from the valve stem 1.

[0030] In this embodiment, the static contact seat 7 includes a static contact body 13 and a housing 14 circumferentially arranged along the static contact body 13. The top end of the static contact body 13 is lower than the top end of the housing 14, and the outer diameter of the moving contact piece 8 is smaller than the inner diameter of the housing 14. The moving contact piece 8 can contact the static contact seat 7 when the valve stem 1 is pressed down to realize the connection of the pulse switch.

[0031] Regarding the materials used for the moving contact 8, the stationary contact 13, and the housing 14, in this embodiment, the moving contact 18 is preferably made of stainless steel, the stationary contact 13 is preferably made of silver-plated copper at its contact top, and the housing 14 is made of plastic to form an insulator.

[0032] In actual installation, the valve cover 4 has a slot 15 on its lower inner wall. The housing 14 is engaged in the slot 15 for locking. The stationary contact 13 is located directly below the moving contact piece 8. When the valve stem 1 is pressed down, the moving contact piece 8 can move downward and contact the stationary contact 13. At the same time, the stationary contact seat 7 also extends radially outward with a connecting terminal 16 to connect to the pulse igniter on an external stove.

[0033] In particular, the contact method has been optimized and improved in this embodiment. The top of the static contact body 13 is constructed as a convex structure that can form a line contact with the moving contact piece 8. Compared with surface contact and point contact, line contact is more suitable for the application of smaller current and higher frequency required in this embodiment, and it is also conducive to the miniaturization design of the plug valve.

[0034] For the convex structure, various possible structural styles are allowed, such as constructing an annular arc-shaped top surface, an annular pointed cone top surface, etc. In this embodiment, the following configuration is preferred: the convex structure constructs a first inclined surface 17 and a second inclined surface 18, and the first inclined surface 17 and the second inclined surface 18 are connected at the top by an arc 19. This structural style has two advantages: firstly, the bottom dimension is large, ensuring sufficient bottom strength; secondly, the cross-sectional width dimension gradually decreases from the bottom to the top, forming a line contact at the top, and the top is also connected by an arc 19, which not only ensures the reliability of the contact, but also makes it more rounded, preventing stress concentration effects caused by a sharp top.

[0035] The plug valve of this utility model is further constructed as follows: two connecting posts 20 are symmetrically provided on the outer side wall of the valve cover 4, and connecting holes 21 are opened on the two connecting posts 20 to connect with the stove panel (not shown). Thus, the plug valve of this disclosure can be connected to the stove panel through the connecting posts 20 without the need to set a sleeve at the top opening end of the valve cover 4 to be locked in the main mounting hole of the stove panel.

[0036] In this embodiment, a connecting block 22 is integrally formed on the outer side wall of the bottom of the valve body 2, and a ground wire connection hole 23 is provided on the connecting block 22. Compared with the prior art, which requires the separate installation of sheet metal connecting blocks, this disclosure uses an integrally formed connecting block 22, which can eliminate the need for sheet metal connecting blocks. At the same time, the connecting block 22 and the valve body 2 are integrally formed, eliminating the need for separate processing and assembly.

[0037] In this disclosure, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this disclosure according to the specific circumstances.

[0038] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0039] In the description of this specification, the terms "this embodiment," "other embodiments," "specific embodiments," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A plug valve, comprising a valve body, wherein the valve body is provided with at least one valve stem extending from the top of the valve body, characterized in that: The valve body is also provided with a pulse structure assembly sleeved on the valve stem, and a sealing structure located inside the valve body is provided between the top opening end of the valve body and the valve stem.

2. A plug valve according to claim 1, characterized in that: The valve body includes a valve body, a connecting body, and a valve cover. The connecting body is installed on the top of the valve body, and the valve cover is installed on the top of the connecting body. A fixing plate is also installed between the connecting body and the valve cover. The pulse structure assembly is limited and fitted between the fixing plate and the valve cover. The sealing structure is located between the top opening of the valve cover and the valve stem and is located inside the valve cover.

3. A plug valve according to claim 2, characterized in that: The pulse structure assembly includes a stationary contact seat, a moving contact plate, and a spring fitted onto the valve stem. The stationary contact seat is located on a fixed plate and below the moving contact plate. The valve stem has an upper axial limiting structure and a lower axial limiting structure. The upper end of the spring abuts against the upper axial limiting structure, and the lower end of the spring abuts against the moving contact plate and presses it against the lower axial limiting structure. When the valve stem is pressed down, the moving contact plate can contact the stationary contact seat to realize the pulse switch connection.

4. A plug valve according to claim 3, characterized in that: The upper axial limiting structure includes an upper limiting plate fitted onto the valve stem, and the lower axial limiting structure includes a limiting step formed on the valve stem.

5. A plug valve according to claim 4, characterized in that: The upper axial limiting structure also includes a retaining ring that is locked on the valve stem. The upper limit plate is pressed against the bottom of the retaining ring by a spring. The outer diameter of the retaining ring is smaller than the outer diameter of the upper limit plate.

6. A plug valve according to claim 3 or 5, characterized in that: The static contact seat includes a static contact body and a housing arranged around the static contact body. The top of the static contact body is lower than the top of the housing, and the outer diameter of the moving contact piece is smaller than the inner diameter of the housing. The moving contact piece can contact the static contact seat when the valve stem is pressed down to realize the connection of the pulse switch.

7. A plug valve according to claim 6, characterized in that: The top of the static contact body is constructed as a convex structure that can form a line contact with the moving contact piece.

8. A plug valve according to claim 7, characterized in that: The convex structure forms a first inclined surface and a second inclined surface, which are connected at the top by a circular arc transition.

9. A plug valve according to claim 2, characterized in that: The valve cover has two symmetrical connecting posts on its outer side wall, and the two connecting posts have connecting holes for connecting to the stove panel.

10. A plug valve according to claim 2, characterized in that: A connecting block is integrally formed on the outer side wall at the bottom of the valve body, and a ground wire connection hole is provided on the connecting block.

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