Civil air defense gate valve with high sealing performance

Abstract

The utility model discloses a civil defense gate valve with high sealing performance in the field of gate valves, which comprises a valve body, a gate and a hand wheel mechanism used for driving the gate to open or close, the valve body comprises a valve platform, a pipeline, a front valve casing and a rear valve casing, the valve platform is provided with a through groove I through which the gate can penetrate, and the valve platform is provided with a through groove II through which the gate can penetrate. The front valve shell and the rear valve shell are oppositely arranged to form a channel for the inserting plate to move, the pipeline is arranged at the bottoms of the front valve shell and the rear valve shell, the upper half portion of the pipeline is provided with a second through groove allowing the inserting plate to penetrate through, the lower half portion of the pipeline is provided with a sealing groove capable of containing the edge of the inserting plate, and the inner wall of the front valve shell and the inner wall of the rear valve shell are both provided with latticed grooves. The top of the inserting plate is connected with a hand wheel mechanism through a movable seat, a plurality of fasteners are arranged on the movable seat, and fixing holes corresponding to the fasteners are formed in the valve platform. According to the utility model, a double-layer sealing mechanism of grid groove dynamic pressure sealing and sealing groove compression sealing is adopted, so that a zero-leakage closed loop in an extreme scene is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plug-in valve, especially relates to a high sealing property civil air defense plug-in valve. BACKGROUND

[0002] The civil air defense plug-in valve is a ventilation control device specially used in civil air defense engineering (people's air defense engineering), mainly used for adjusting or cutting off the circulation of air, dust and other media, and ensuring the safe and reliable operation of the ventilation system of underground space (such as air-raid shelters, basements, civil air defense shelters and the like). The core function is protection and sealing, and the safety environment of personnel in wartime or emergency situations is ensured.

[0003] In the prior art, the sealing surface of the valve body is a flat surface or a single annular sealing groove, and static sealing is realized by relying on the compression of a rubber gasket. The disadvantages are that the inner wall of the traditional flat valve body is easily deformed under impact load, resulting in the formation of micron-level leakage channels between the plug-in plate and the valve body; and in a nuclear and biochemical pollution environment, the rubber sealing ring will swell and age, and insufficient sealing specific pressure will cause chronic leakage. UTILITY MODEL CONTENTS

[0004] The utility model discloses a high sealing property civil air defense plug-in valve, solve the problem of the deformation leakage of the traditional flat valve body in wartime and the easy failure of the sealing material, and improve the overall sealing performance of the plug-in valve.

[0005] The utility model discloses a high sealing property civil air defense plug-in valve, solve the problem of the deformation leakage of the traditional flat valve body in wartime and the easy failure of the sealing material, and improve the overall sealing performance of the plug-in valve.

[0006] In use, the handwheel mechanism controls the downward movement of the insert plate. Through groove one and through groove two precisely guide the vertical movement of the insert plate. When the insert plate closes, its edge sinks into the sealing groove to form the main seal, and compression sealing is achieved under the locking action of the fasteners. The grid-like grooves can not only form micro oil storage chambers to continuously lubricate the moving surface of the insert plate and reduce the coefficient of friction, but also form multi-stage seals. When a shock wave is applied, any tiny leaking airflow that attempts to penetrate the main seal must pass through these deep and complex groove networks, which greatly increases the flow resistance, significantly slows down the leakage rate, and improves the overall sealing level. Compared with the prior art, the advantages of this utility model are as follows: the adoption of a double-layer sealing mechanism of dynamic pressure sealing with grid groove and compression sealing with sealing groove ensures zero leakage closed loop in extreme scenarios such as wartime explosions and toxic gas infiltration; the channel formed by the two valve shells provides a stable guide for the movement of the slide plate, ensuring that the movement trajectory of the slide plate is straight; the fasteners on the movable seat and the fixing holes on the valve platform can firmly lock the slide plate in the correct position after it is closed, preventing the slide plate from accidentally moving or loosening under pressure fluctuations, vibrations or impacts, which would lead to sealing failure, and ensuring a long-term and reliable sealing state.

[0007] As a further improvement of this utility model, both ends of the pipeline are provided with connecting flanges, and the connecting flanges, valve platform, pipeline, front valve body and rear valve body are connected as one unit by welding process.

[0008] As a further improvement of this utility model, multiple reinforcing ribs are provided on the outer sides of both the front valve housing and the rear valve housing.

[0009] As a further improvement of this utility model, the fastener includes a fastening screw and a fastening nut, wherein the fastening screw passes through a fixing hole and is threadedly connected to the fastening nut to lock the movable seat on the valve platform.

[0010] As a further improvement of this utility model, the handwheel mechanism includes a threaded valve stem, with a handwheel at the upper end and the lower end rotatably mounted on a movable seat via a bearing.

[0011] As a further improvement of this utility model, the handwheel mechanism is supported on the valve body by a support base. The support base includes two opposing arc-shaped plates. A vertical plate is provided on the inner side of the arc-shaped plates. Several reinforcing plates are arranged sequentially from top to bottom on both sides of the vertical plate. A mounting platform is provided on the top of the two arc-shaped plates. An internal thread that mates with the threaded valve stem is provided in the mounting platform. Attached Figure Description

[0012] Figure 1 This is a side view of the present invention.

[0013] Figure 2 for Figure 1 Sectional view at point AA.

[0014] Figure 3 This is a schematic diagram illustrating the sealing principle of the grid-like groove.

[0015] The components include: 1. Valve platform; 2. Pipeline; 3. Front valve body; 4. Rear valve body; 5. Connecting flange; 6. Groove; 7. Movable seat; 8. Reinforcing rib; 9. Fastening screw; 10. Fastening nut; 11. Threaded valve stem; 12. Handwheel; 13. Arc plate; 14. Vertical plate; 15. Reinforcing plate; 16. Mounting platform; 17. Insert plate. Detailed Implementation

[0016] like Figures 1-2 As shown, a high-sealing air-raid shelter slide gate valve includes a valve body, a slide gate 17, and a handwheel mechanism for driving the slide gate 17 to open or close. The valve body includes a valve platform 1, a pipe 2, a front valve shell 3, and a rear valve shell 4. The valve platform 1 has a through groove 1 that allows the slide gate 17 to pass through. The front valve shell 3 and the rear valve shell 4 are arranged opposite to each other to form a channel for the slide gate 17 to move. The pipe 2 is located at the bottom of the front valve shell 3 and the rear valve shell 4. The upper half has a through groove 2 that allows the slide gate 17 to pass through, and the lower half has a sealing groove that can accommodate the edge of the slide gate 17. Both ends of the pipe 2 are provided with connecting flanges 5. The inner walls of the front valve shell 3 and the rear valve shell 4 are covered with grid-like grooves 6. The top of the slide gate 17 is connected to the handwheel mechanism through a movable seat 7. The movable seat 7 is provided with a ring of spaced fasteners, and the valve platform 1 has fixing holes corresponding to the fasteners.

[0017] The connecting flange 5, valve platform 1, pipe 2, front valve body 3, and rear valve body 4 are connected into one unit through welding, ensuring that the valve body itself will not become a source of leakage when subjected to positive or negative pressure conditions. Combined with the double sealing structure of the slide gate 17, the overall airtightness of the entire valve reaches an extremely high level, easily meeting the most stringent airtightness test standards for civil defense projects.

[0018] To increase the moment of inertia of the valve body section and enhance its resistance to bending and local deformation, multiple reinforcing ribs 8 are provided on the outer sides of both the front valve body 3 and the rear valve body 4.

[0019] In this embodiment, the fastener includes a fastening screw 9 and a fastening nut 10. The fastening screw 9 passes through the fixing hole and is threadedly connected to the fastening nut 10, locking the movable seat 7 onto the valve platform 1. The handwheel mechanism includes a threaded valve stem 11. A handwheel 12 is provided at the upper end of the threaded valve stem 11, and the lower end is rotatably mounted on the movable seat 7 through a bearing.

[0020] The hand wheel mechanism is supported on the valve body through the supporting seat, the supporting seat comprises two oppositely arranged arc-shaped plates 13, the inner side of the arc-shaped plate 13 is provided with a vertical plate 14, in order to improve the rigidity and the bending and torsion resistance of the whole supporting seat, three reinforcing plates 15 are sequentially arranged from top to bottom on the two sides of the vertical plate 14; the top of the two arc-shaped plates 13 is provided with a mounting table 16, and the mounting table 16 is internally provided with an internal thread matched with the threaded valve rod 11.

[0021] The application will be described in detail below Figure 3 The flow of the gas is analyzed when the gas passes through the multistage seal, and the gas flows from the high-pressure end to the low-pressure end under the action of the pressure difference before and after the seal, and flows into the groove 6 cavity through the gap (channel). When the gas flows into the next groove 6 cavity from the space, the flow rate is reduced compared to before, and the gas flows through the next gap and flows into the next groove 6 cavity, and the above process is repeated. When the gas enters the last groove 6 cavity, the speed of the gas tends to 0, thereby achieving the purpose of greatly reducing the leakage rate.

[0022] The utility model discloses the advantages are in: main part adopts the welding technology and forms rigid connection, and the overall rigidity and deformation resistance of whole valve are improved greatly, and the nuclear explosion shock wave, conventional explosion shock wave or other extreme external load is responded to, the design of symmetrical arc-shaped plate 13 makes it closely adhere on the outer contour of valve platform 1, forms the surrounding structure similar to "clamping hoop", and the support force that it provides is far more than single point or single line contact structure, the overturning moment of double arc-shaped plate 13 structure through its package and clamp form can effectively resist the supporting seat when hand wheel 12 rotates, prevents the supporting seat from shaking, loosening even breakage.

[0023] The utility model discloses the advantages are in: main part adopts the welding technology and forms rigid connection, and the overall rigidity and deformation resistance of whole valve are improved greatly, and the nuclear explosion shock wave, conventional explosion shock wave or other extreme external load is responded to, the design of symmetrical arc-shaped plate 13 makes it closely adhere on the outer contour of valve platform 1, forms the surrounding structure similar to "clamping hoop", and the support force that it provides is far more than single point or single line contact structure, the overturning moment of double arc-shaped plate 13 structure through its package and clamp form can effectively resist the supporting seat when hand wheel 12 rotates, prevents the supporting seat from shaking, loosening even breakage. The utility model discloses the advantages are in: main part adopts the welding technology and forms rigid connection, and the overall rigidity and deformation resistance of whole valve are improved greatly, and the nuclear explosion shock wave, conventional explosion shock wave or other extreme external load is responded to, the design of symmetrical arc-shaped plate 13 makes it closely adhere on the outer contour of valve platform 1, forms the surrounding structure similar to "clamping hoop", and the support force that it provides is far more than single point or single line contact structure, the overturning moment of double arc-shaped plate 13 structure through its package and clamp form can effectively resist the supporting seat when hand wheel 12 rotates, prevents the supporting seat from shaking, loosening even breakage.

Claims

1. A high sealing air defense plug valve, comprising a valve body, a plug and a hand wheel mechanism for driving the plug to open or close, characterized in that, The valve body comprises a valve platform, a pipeline, a front valve shell and a rear valve shell, the valve platform is provided with a through slot one through which the plug plate can pass, the front valve shell and the rear valve shell are oppositely arranged to form a channel through which the plug plate can move, the pipeline is arranged at the bottom of the front valve shell and the rear valve shell, the upper half is provided with a through slot two through which the plug plate can pass, and the lower half is provided with a sealing groove in which the edge of the plug plate can be accommodated, the inner walls of the front valve shell and the rear valve shell are evenly distributed with grid-shaped grooves, the top of the plug plate is connected with a hand wheel mechanism through a movable seat, a plurality of fasteners are arranged on the movable seat, and the valve platform is provided with fixing holes corresponding to the fasteners.

2. The high sealing air defense plug valve according to claim 1, characterized in that, Both ends of the pipeline are provided with connecting flanges, the connecting flanges, the valve platform, the pipeline, the front valve shell and the rear valve shell are connected into one body through a welding process.

3. The high sealing air defense plug valve according to claim 1, characterized in that, The outer sides of the front valve shell and the rear valve shell are both provided with a plurality of reinforcing ribs.

4. The high sealing air defense plug valve according to claim 1, characterized in that, The fastener comprises a fastening screw rod and a fastening nut, the fastening screw rod is threadedly connected with the fastening nut through the fixing hole to lock the movable seat on the valve platform.

5. The high sealing civil defense flapper valve according to claim 1, wherein, The hand wheel mechanism comprises a threaded valve rod, the upper end of the threaded valve rod is provided with a hand wheel, and the lower end is rotatably arranged on the movable seat through a bearing.

6. The high sealing air defense plug valve according to claim 5, characterized in that, The hand wheel mechanism is supported on the valve body through a supporting seat, the supporting seat comprises two oppositely arranged arc-shaped plates, the inner sides of the arc-shaped plates are provided with vertical plates, a plurality of reinforcing plates are sequentially arranged on the two sides of the vertical plates from top to bottom, the top of the arc-shaped plate is provided with a mounting table, and the mounting table is internally provided with an internal thread matched with the threaded valve rod.

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