Plug valve provided with fire-retaining air outlet duct

Abstract

The utility model discloses a plug valve provided with a fire-retaining air outlet duct, which comprises a valve body, the fire-retaining air outlet duct is arranged on the valve body, a connecting body is arranged at the top of the valve body, a valve cover component is arranged on the connecting body, a fixing plate is further arranged and connected between the connecting body and the valve cover component, and the fixing plate is connected with the fire-retaining air outlet duct. The fire-preserving gas outlet hole channel is internally provided with an adjusting screw, and is characterized in that at least part of a rod body of the adjusting screw extends out of the fire-preserving gas outlet hole channel, the fixed plate is provided with a clamping part, and the part of the rod body extending out of the fire-preserving gas outlet hole channel is clamped on the clamping part. According to the plug valve, the adjusting screw can be conveniently prevented from being disengaged, and a grub screw does not need to be arranged.

Description

Technical Field

[0001] This utility model relates to the field of plug valve technology, specifically a plug valve based on a flame-preserving venting channel. Background Technology

[0002] A plug valve is generally equipped with a valve core that rotates under the drive of the valve stem. In actual use, the rotation of the valve core within the valve body is used to adjust the air output of each channel. These channels generally include a high-fire air output channel, a low-fire air output channel, and a flame-preserving air output channel.

[0003] In order to adjust the amount of flammable gas, an adjusting screw is generally provided in the flammable gas outlet channel. The amount of flammable gas can be adjusted by rotating the adjusting screw in or out.

[0004] Currently, the common method to prevent the adjusting screw from coming loose is to install a flat-head screw on the head of the adjusting screw. This flat-head screw presses the adjusting screw into the flame-retardant vent channel, thus preventing it from coming loose. This method requires an additional independent component, namely the flat-head screw, and the flat-head screw needs to be screwed in during operation.

[0005] Therefore, for those skilled in the art, how to avoid the use of flat-head screws, thereby making the anti-loosening operation of the adjusting screw simple and easy to implement, is a technical problem that urgently needs to be solved. Utility Model Content

[0006] The purpose of this utility model is to provide a plug valve with a flame-preserving vent, so as to solve the problem that the existing technology requires the additional independent installation of flat-head screws, which leads to the operation being not simple and not easy to implement.

[0007] This utility model provides the following technical solution: a plug valve based on a flame-preserving vent channel, comprising a valve body, the valve body having a flame-preserving vent channel, a connecting body mounted on the top of the valve body, a valve cover assembly mounted on the connecting body, a fixing plate also being installed and connected between the connecting body and the valve cover assembly, an adjusting screw being provided in the flame-preserving vent channel, at least a portion of the adjusting screw extending out of the flame-preserving vent channel, and a snap-fit ​​portion being snapped onto the fixing plate.

[0008] Preferably, the locking part has a locking slot, and the part of the rod extending out of the fireproof venting channel is locked into the locking slot.

[0009] Preferably, the snap-fit ​​portion is configured as a snap-fit ​​plate structure with a snap-fit ​​opening, the snap-fit ​​plate structure protruding radially from the fixing plate.

[0010] Preferably, the bayonet is configured as an arc-shaped opening that matches the outer wall of the portion of the rod extending out of the fireproof vent.

[0011] Preferably, the portion of the rod extending out of the flame-preserving vent is configured as the upper part of the adjusting screw, and the bayonet position corresponds to the annular groove at the head of the adjusting screw.

[0012] Preferably, the card plate structure and the fixing plate form an arc transition connection, and the card plate structure is constructed as an arc plate.

[0013] Preferably, the fire-preserving vent includes an adjustment channel with a top opening, an air inlet channel communicating with the side of the adjustment channel, and an air outlet channel communicating with the bottom of the adjustment channel. The adjustment screw is located in the adjustment channel and at least a portion of the screw extends out of the top opening.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In order to prevent the adjusting screw from coming out, the plug valve of this utility model has a locking part on the fixing plate. At the same time, the adjusting screw located in the flame-preserving vent channel extends out of the flame-preserving vent channel, and the extended part is locked and limited by the locking part to prevent the adjusting screw from coming out of the flame-preserving vent channel.

[0016] The adjusting screw anti-loosening structure of this utility model eliminates the need for a separate additional flat-head screw. When performing the anti-loosening operation, there is no need to screw the flat-head screw in. Simply lock the protruding part onto the locking part to achieve anti-loosening. The whole process is convenient and effective. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the plug valve of this utility model;

[0018] Figure 2 This is a top view of the plug valve of this utility model;

[0019] Figure 3 for Figure 2 Schematic diagram at point BB in the diagram;

[0020] Figure 4 for Figure 1 Enlarged diagram of point A in the diagram;

[0021] Figure 5 This is a three-dimensional structural diagram of the fixing plate of the plug valve of this utility model.

[0022] In the diagram: 1. Valve body; 2. Valve stem; 3. Flame-preserving vent; 4. Adjustment channel; 5. Inlet channel; 6. Outlet channel; 7. Adjustment screw; 8. Connector; 9. Valve cover assembly; 10. Fixing plate; 11. Snap-fit ​​part; 12. Bayonet; 13. Annular groove. Detailed Implementation

[0023] 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.

[0024] Specifically, the detailed structure of the plug valve of this utility model is described in detail below with reference to embodiments.

[0025] Example

[0026] Reference Figure 1-5 This utility model proposes a plug valve, which includes a valve body 1. The valve body 1 has a valve core mounting cavity (not shown), and a valve core (not shown) that can rotate under the rotation of a valve stem 2 is disposed in the valve core mounting cavity. The valve core has various vent holes, including a flame-preserving vent hole (not shown).

[0027] The valve body 1 is also provided with a flame-preserving gas outlet channel 3, which is connected to the flame-preserving gas outlet. In this way, after the external gas source enters the valve core, some gas enters the flame-preserving gas outlet from the flame-preserving gas outlet. At this time, the flame-preserving gas outlet channel 3 forms an adjustment channel 4 with a top opening, an air inlet channel 5 connected to the side of the adjustment channel 4, and an air outlet channel 6 connected to the bottom of the adjustment channel 4. The air inlet channel 5 is connected to the flame-preserving gas outlet. At this time, some gas first enters the air inlet channel 5 from the flame-preserving gas outlet.

[0028] To adjust the amount of gas supplied for flame preservation, an adjusting screw 7 is provided in the adjusting channel 4. The upper middle or upper part of the adjusting screw 7 extends out of the top opening of the adjusting channel 4. When it is necessary to adjust the amount of gas supplied for flame preservation, the adjusting screw 7 is screwed in or out a small distance, which changes the area of ​​the outlet of the air inlet channel 5, thereby changing the amount of gas supplied and ultimately adjusting the amount of gas supplied for flame preservation.

[0029] After the adjusting screw 7 is adjusted to its proper position, it is necessary to prevent the adjusting screw 7 from remaining in the adjusting channel 4 during the use of the stopcock valve. To solve the problem of preventing the adjusting screw from coming out, in this embodiment, a connecting body 8 is also installed on the top of the valve body 1. A valve cover assembly 9 is installed on the connecting body 8, and a fixing plate 10 is also installed and connected between the connecting body 8 and the valve cover assembly 9. The fixing plate 10 is provided with a snap-fit ​​part 11, and the part of the adjusting screw 7 that protrudes from the top opening of the adjusting channel 4 is snapped onto the snap-fit ​​part 11. Thus, the snap-fit ​​part 11 can be used to snap and limit the adjusting screw 7, preventing the adjusting screw 7 from coming out of the adjusting channel 4.

[0030] Specifically, in this embodiment, the snap-fit ​​part 11 has a snap-fit ​​opening 12, and the portion of the adjusting screw 7 that extends out of the top opening of the adjusting channel 4 snaps into the snap-fit ​​opening 12. During snap-fit, the adjusting screw 7 is snapped into the snap-fit ​​opening 12 by side insertion. The entire snap-fit ​​process is convenient and easy to operate, and there is no need to set an additional flat-head screw.

[0031] Regarding the construction of the latching part, in this embodiment, it is constructed as a latching plate structure with a latch 12, the latching plate structure protruding radially from the fixing plate 10. Of course, other embodiments are allowed to have other structural styles, such as non-plate structures, as long as they can latch the adjusting screw 7, they are all within the protection scope of this claim.

[0032] In this embodiment, the bayonet 12 is configured as an arc-shaped opening that matches the snap-fit ​​portion on the adjusting screw 7. The arc-shaped opening is easy to open and has a similar shape to the matching portion on the adjusting screw 7, which can effectively achieve the snap-fit ​​of the adjusting screw 7.

[0033] In this embodiment, the part of the rod extending out of the adjustment channel 4 is the upper part of the adjustment screw 7, and the position of the latch 12 corresponds to the annular groove 13 located at the head of the adjustment screw 7. In this way, when the screw is engaged, the upper and lower parts of the annular groove 13 are restricted by the body of the adjustment screw 7, which can prevent the adjustment screw 7 from axially dislodging.

[0034] In this embodiment, the clamping plate structure and the fixing plate 10 form a rounded transition connection, and the clamping plate structure is constructed as a whole in the shape of a rounded plate. The main consideration is ease of processing and forming, and to avoid abrupt right-angle connections after forming, maintaining a smooth transition of the component and improving product quality.

[0035] In this embodiment, the bayonet 12 is directly opposite the annular groove 13 of the adjusting screw 7, and the bayonet 12 is also opened along the radial direction of the fixing plate 10. This arrangement is mainly to facilitate the setting on the one hand, and on the other hand, it is directly opposite the annular groove 13 from the radial direction of the fixing plate 10, which facilitates the snap-fit ​​operation.

[0036] Of course, in other embodiments, the bayonet 12 may not be opened along the radial direction of the fixed plate, as long as it can achieve the engagement of the adjusting screw 7, it is within the protection scope of this claim.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plug valve with a flame-retardant vent channel, comprising a valve body, the valve body having a flame-retardant vent channel, a connecting body mounted on the top of the valve body, a valve cover assembly mounted on the connecting body, a fixing plate further connecting the connecting body and the valve cover assembly, and an adjusting screw provided in the flame-retardant vent channel, characterized in that: The adjusting screw has at least a part of the rod body extending out of the fireproof gas outlet channel, and the fixing plate is provided with a clamping portion, and the part of the rod body extending out of the fireproof gas outlet channel is clamped on the clamping portion.

2. A cock valve based fire protection outlet according to claim 1, characterized in that: The clamping portion is provided with a clamping hole, and the part of the rod body extending out of the fireproof gas outlet channel is clamped in the clamping hole.

3. A cock valve based fire protection outlet according to claim 2, characterized in that: The clamping portion is configured as a clamping plate structure with a clamping hole, and the clamping plate structure protrudes radially out of the fixing plate.

4. A cock valve based fire protection outlet according to claim 2 or 3, characterized in that: The clamping hole is configured as an arc-shaped opening matched with the outer wall of the part of the rod body extending out of the fireproof gas outlet channel.

5. A cock valve based fireproof outlet channel according to claim 2 or 3, characterized in that: The part of the rod body extending out of the fireproof gas outlet channel is configured as the upper part of the adjusting screw, and the position of the clamping hole corresponds to the ring groove of the adjusting screw at the head.

6. A plug valve based fire safe outlet according to claim 3, wherein: The clamping plate structure and the fixing plate are connected by a circular arc transition, and the clamping plate structure is configured as a circular arc plate as a whole.

7. A plug valve based fire safe outlet according to claim 1, wherein: The fireproof gas outlet channel comprises an adjusting channel provided with a top opening, an air inlet channel connected with the side of the adjusting channel, and an air outlet channel connected with the bottom of the adjusting channel, and the adjusting screw is located in the adjusting channel and at least a part of the rod body extends out of the top opening.

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