Dome valve with inflatable seal ring

Abstract

The utility model discloses a kind of dome valves with inflatable sealing ring not easy to fall off, rotating frame includes ring body and connecting foot, two connecting feet of ring body lower surface are connected with valve stem and auxiliary shaft respectively by sleeve, valve stem and auxiliary shaft are all rotationally connected with the lateral wall of cylindrical valve seat, hemispherical valve core is fastened and connected with ring body by second bolt, annular groove is set in the location of through-hole of cylindrical valve seat, first boss and second boss are arranged in annular groove, barbed projection is arranged in the inner side of second boss, inflatable sealing ring and press ring are all arranged in annular groove, the inner clamping groove of inflatable sealing ring cooperates with second boss and barbed projection, press ring is pressed on the lower surface of inflatable sealing ring, the third boss of press ring cooperates with the outer clamping groove of inflatable sealing ring, the utility model structure is reasonable, when hemispherical valve core needs to be replaced due to material abrasion or gas corrosion, it is not necessary to replace together with rotating frame, use cost is greatly reduced, and the stability of inflatable sealing ring is greatly improved and not easy to fall off.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and more particularly to valve technology, specifically a dome valve with an inflatable sealing ring that is not easily detached. Background Technology

[0002] The dome valve is a key control valve specifically designed for pneumatic conveying systems. It employs a hemispherical valve core and an inflatable sealing ring working together, with the material flow channel opening and closing by rotating the valve core 90°. Its core function is to cut off flowing or stationary materials (such as powdery or granular materials) while ensuring sealing. It is widely used in industries such as power, metallurgy, chemical, and food processing.

[0003] In the existing technology, the air-filled sealing ring inside the dome valve is generally sealed using a single-sided locking structure, which makes the air-filled sealing ring prone to falling off. In addition, the existing hemispherical valve core and rotating frame are mostly integrated structures. When they need to be replaced after long-term use due to friction with materials or gas corrosion, the rotating frame can only be replaced together, which increases the cost. Therefore, there is an urgent need for an improved technology to solve the above-mentioned problems in the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a dome valve with an inflatable sealing ring that is not easily detached, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dome valve with an inflatable sealing ring that is not easily detached, comprising a cylindrical valve seat, a rotating frame, a valve stem, a secondary shaft, a hemispherical valve core, an inflatable sealing ring, and a pressure ring. The rotating frame and the hemispherical valve core are both movably disposed within the cylindrical valve seat. The rotating frame includes a ring body and connecting feet. Connecting feet are symmetrically arranged on both sides of the lower surface of the ring body. A sleeve parallel to the radial direction of the ring body is provided at the end of each connecting foot away from the ring body. The sleeves of the two connecting feet are coaxial. The valve stem is inserted into the sleeve of one connecting foot and fastened by a first bolt. The secondary shaft is inserted into the sleeve of the other connecting foot and fastened by another first bolt. The valve stem and the secondary shaft are rotatably connected to the side wall of the cylindrical valve seat. The lower surface of the hemispherical valve core is connected by a second bolt. The bolt and the ring are fastened together. The top of the cylindrical valve seat has a through hole, and the cylindrical valve seat has an annular groove at the through hole. The annular groove has a first boss and a second boss. The inner side of the second boss has a barbed protrusion. The inflatable sealing ring is set in the annular groove. The upper inner surface of the inflatable sealing ring has an inner groove, and the lower outer surface of the inflatable sealing ring has an outer groove. The inner groove cooperates with the second boss and the barbed protrusion, and an air cavity is formed between the inner groove and the second boss. The pressure ring is fastened to the first boss by a third bolt. The pressure ring is pressed against the lower surface of the inflatable sealing ring. The upper inner surface of the pressure ring has a third boss, which cooperates with the outer groove of the inflatable sealing ring. The inner surface of the inflatable sealing ring cooperates with the outer surface of the hemispherical valve core.

[0006] Preferably, the dome valve with an inflatable sealing ring that is not easy to fall off provided by this utility model has sliding bearings coaxially arranged on both sides of the cylindrical valve seat, and the valve stem and the auxiliary shaft each pass through the corresponding sliding bearing and cooperate with the sliding bearing.

[0007] Preferably, the present invention provides a dome valve with an inflatable sealing ring that is not easy to fall off, wherein the bottom of the cylindrical valve seat is provided with a flange, and each of the two sides of the cylindrical valve seat and the two sides located on the sliding bearing is provided with a first reinforcing plate. The bottom of the first reinforcing plate is connected to the flange, and the outer ends of the two first reinforcing plates located on the valve stem side are further provided with actuator mounting plates. A second reinforcing plate is provided between the actuator mounting plate and the first reinforcing plate.

[0008] Preferably, the present invention provides a dome valve with an inflatable sealing ring that is not easy to fall off, wherein the ring body is provided with a plurality of first connecting holes parallel to the axial direction, and the lower surface of the hemispherical valve core is provided with a plurality of first screw holes, the first screw holes and the first connecting holes are corresponding one to one and connected by a second bolt.

[0009] Preferably, the dome valve with an inflatable sealing ring that is not easy to fall off provided by this utility model has a groove inside the hemispherical valve core.

[0010] Preferably, the dome valve with an inflatable sealing ring that is not easy to fall off provided by this utility model has a plurality of second connecting holes parallel to the axial direction on the pressure ring, and a plurality of second screw holes on the lower surface of the first boss. The second screw holes correspond one-to-one with the second connecting holes and are connected by a third bolt.

[0011] Preferably, the dome valve with an inflatable sealing ring that is not easy to fall off provided by this utility model has a plurality of third screw holes annularly opened on the upper surface of the cylindrical valve seat.

[0012] Preferably, the present invention provides a dome valve with an inflatable sealing ring that is not easy to fall off, wherein the cylindrical valve seat has an air passage inside, one end of the air passage passes through the second protrusion and communicates with the air cavity between the inner groove and the second protrusion, the other end of the air passage communicates with the outside of the cylindrical valve seat, and the outer end of the air passage is also provided with an air pipe connection port.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The hemispherical valve core is connected to the ring of the rotating frame via the second bolt. The hemispherical valve core is a detachable structure. When the hemispherical valve core needs to be replaced due to material wear or gas corrosion, only the hemispherical valve core needs to be replaced, without replacing the rotating frame as well, which greatly reduces the cost of use. The inner groove of the inflatable sealing ring cooperates with the second boss and the barbed protrusion. The pressure ring is pressed into the outer groove of the inflatable sealing ring by the third boss, which greatly improves the stability of the inflatable sealing ring and makes it less likely to fall off. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 For the appendix Figure 1 Enlarged structural diagram of point A in the middle;

[0017] Figure 3 For the appendix Figure 1 A schematic diagram of the left-side view structure;

[0018] Figure 4 This is a top view of the structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the hemispherical valve core from a bottom view.

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of a cylindrical valve seat;

[0021] Figure 7 For the appendix Figure 6 Enlarged structural diagram of point B in the middle;

[0022] Figure 8 This is a schematic diagram of the cross-sectional structure of the inflatable sealing ring;

[0023] Figure 9 This is a schematic diagram of the cross-sectional structure of the pressure ring;

[0024] Figure 10 This is a schematic diagram of the cross-sectional structure of the rotating frame and the hemispherical valve core of this utility model;

[0025] Figure 11 This is a top view of the rotating frame structure.

[0026] In the diagram: 1. Cylindrical valve seat; 2. Rotating frame; 3. Valve stem; 4. Countershaft; 5. Hemispherical valve core; 6. Inflatable sealing ring; 7. Pressure ring; 8. First bolt; 9. Second bolt; 10. Through hole; 11. Annular groove; 12. First boss; 13. Second boss; 14. Barbed protrusion; 15. Inner groove; 16. Outer groove; 17. Third boss; 18. Third bolt; 19. Sliding bearing; 20. Flange; 21. First reinforcing plate; 22. Actuator mounting plate; 23. Second reinforcing plate; 24. First screw hole; 25. Groove; 26. Second connecting hole; 27. Second screw hole; 28. Third screw hole; 29. ​​Air passage; 30. Air pipe connection port; 201. Ring body; 202. Connecting foot; 203. Sleeve; 204. First connecting hole. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 utility model.

[0029] Please see Figure 1-11This utility model provides a technical solution: a dome valve with an inflatable sealing ring that is not easily detached, comprising a cylindrical valve seat 1, a rotating frame 2, a valve stem 3, a secondary shaft 4, a hemispherical valve core 5, an inflatable sealing ring 6, and a pressure ring 7. The rotating frame 2 and the hemispherical valve core 5 are both movably disposed within the cylindrical valve seat 1. The rotating frame 2 includes a ring body 201 and connecting feet 202. Connecting feet 202 are symmetrically arranged on both sides of the lower surface of the ring body 201. Each of the two connecting feet 202 has a sleeve 203 parallel to the radial direction of the ring body 201 at the end away from the ring body 201. The sleeves 203 of the two connecting feet 202 are coaxial. The valve stem 3 is inserted into the sleeve 203 of one of the connecting feet 202 and fastened by a first bolt 8. The secondary shaft 4 is inserted into the sleeve 203 of the other connecting foot 202 and... The valve stem 3 and the auxiliary shaft 4 are rotatably connected to the side wall of the cylindrical valve seat 1 by another first bolt 8. Sliding bearings 19 are coaxially arranged on both sides of the cylindrical valve seat 1. The valve stem 3 and the auxiliary shaft 4 each pass through their corresponding sliding bearings 19 and cooperate with them. The sliding bearings 19 ensure smooth rotation of the valve stem 3 and the auxiliary shaft 4. The lower surface of the hemispherical valve core 5 is fastened to the ring body 201 by a second bolt 9. A groove 25 is provided inside the hemispherical valve core 5 to reduce material usage, save costs, and reduce overall weight. Several first connecting holes 204 parallel to the axial direction are provided on the ring body 201. Several first screw holes 24 are provided on the lower surface of the hemispherical valve core 5. The first screw holes 24 correspond one-to-one with the first connecting holes 204 and are connected through... The second bolt 9 is used for connection, thereby enabling the connection and disassembly of the hemispherical valve core 5 and the ring body 201. The top of the cylindrical valve seat 1 has a through hole 10, and the cylindrical valve seat 1 has an annular groove 11 at the through hole 10. The annular groove 11 has a first boss 12 and a second boss 13. The inner side of the second boss 13 has a barbed protrusion 14. The inflatable sealing ring 6 is set in the annular groove 11. The upper surface of the inner side of the inflatable sealing ring 6 has an inner groove 15, and the lower surface of the outer side of the inflatable sealing ring 6 has an outer groove 16. The inner groove 15 cooperates with the second boss 13 and the barbed protrusion 14, forming an air cavity between the inner groove 15 and the second boss 13. The pressure ring 7 is fastened to the first boss 12 by the third bolt 18. The pressure ring 7 has several flat... The second connecting hole 26 runs axially. Several second screw holes 27 are provided on the lower surface of the first boss 12. Each second screw hole 27 corresponds to one of the second connecting holes 26 and is connected by a third bolt 18. This allows for the connection and disassembly of the pressure ring 7 and the first boss 12 via the third bolt 18. The pressure ring 7 presses against the lower surface of the inflatable sealing ring 6. A third boss 17 is provided on the upper inner surface of the pressure ring 7. The third boss 17 engages with the outer groove 16 of the inflatable sealing ring 6. The inner surface of the inflatable sealing ring 6 engages with the outer surface of the hemispherical valve core 5. An air passage 29 is provided inside the cylindrical valve seat 1. One end of the air passage 29 passes through the second boss 13 and communicates with the air cavity between the inner groove 15 and the second boss 13. The other end of the air passage 29 communicates with the outside of the cylindrical valve seat 1.An endotracheal connection port 30 is also provided at the outer end of the airway 29.

[0030] A flange 20 is provided at the bottom of the cylindrical valve seat 1. A first reinforcing plate 21 is provided on both sides of the cylindrical valve seat 1 and on both sides of the sliding bearing 19. The bottom of the first reinforcing plate 21 is connected to the flange 20 to ensure the structural strength of the flange 20. The outer ends of the two first reinforcing plates 21 located on one side of the valve stem 3 are also provided with actuator mounting plates 22. A second reinforcing plate 23 is provided between the actuator mounting plate 22 and the first reinforcing plate 21. The actuator mounting plate 22 is used to install the start actuator or electric actuator, and the second reinforcing plate 23 is used to ensure the structural strength and stability of the actuator mounting plate 22. Several third screw holes 28 are opened in a ring on the upper surface of the cylindrical valve seat 1 to connect with the material pipeline.

[0031] Assembly method and operating principle: First, place the inflatable sealing ring 6 into the annular groove 11 at the top of the cylindrical valve seat 1. Align the inner groove 15 of the inflatable sealing ring 6 with the second boss 13 and the barbed protrusion 14 to prevent the inner side of the inflatable sealing ring 6 from falling off. Then, place the pressure ring 7 into the annular groove 11 and support it on the lower surface of the first boss 12. Simultaneously, the pressure ring 7 presses against the lower surface of the inflatable sealing ring 6. At the same time, insert the third boss 17 of the pressure ring 7 into the outer groove 16 on the lower surface of the inflatable sealing ring 6. After aligning the second connecting hole 26 of the pressure ring 7 with the second screw hole 27 of the first boss 12, use the third bolt 18 to secure the pressure ring 7 to the first boss 12, thus completing the fixing of the inflatable sealing ring 6. The outer edge of the upper surface of the pressure ring 7 is chamfered to facilitate insertion into the annular groove 11. Next, place the hemispherical valve core 5 onto the upper surface of the ring body 201, and align the first screw hole 24 at the bottom of the hemispherical valve core 5 with the second screw hole 27 of the ring body 201. Simultaneously, use the second bolt 9 to secure the hemispherical valve core 5 to the ring body 201. Then, place the rotating frame 2 into the cylindrical valve seat 1, pass the valve stem 3 and the auxiliary shaft 4 through the sliding bearings 19 on both sides of the cylindrical valve seat 1, and insert them into the sleeves 203 of the connecting feet 202 on both sides of the bottom of the ring body 201. Use the first bolt 8 to secure the valve stem 3 and the auxiliary shaft 4 to the two sleeves 203 respectively, completing the assembly. Before use, install the actuator on the actuator mounting plate 22, and connect the actuator's output shaft to the valve stem 3. The valve stem 3 can be connected to the actuator's output shaft via a coupling, or through a square hole at the outer end of the valve stem 3. The air pipe connection port 30 at the outer end of the air passage 29 is connected to the cylinder via a flexible hose. In use, the material pipeline is fastened to the third screw hole 28 on the upper surface of the cylindrical valve seat 1 with bolts. The piston rod of the cylinder retracts, thereby causing the inflation sealing ring 6 to contract. The actuator drives the valve rod 3 to rotate. The valve rod 3 then drives the hemispherical valve core 5 to rotate around the valve rod 3 through the rotating frame 2. When the hemispherical valve core 5 rotates to the through hole 10, the cylinder inflates the air passage, thereby inflating the air cavity between the inner groove 15 and the second protrusion 13. At this time, the inflation sealing ring 6 pushes outward and squeezes against the hemispherical valve core 5. At this time, the dome valve is in the closed state. When the air is released inside the inflation sealing ring 6, the outer surface of the hemispherical valve core 5 leaves the through hole 10, and the dome valve is in the open state. When the hemispherical valve core 5 fails to meet the sealing requirements due to material wear or gas corrosion, the hemispherical valve core 5 can be disassembled after removing the second bolt 9, and the hemispherical valve core 5 can be replaced. When the inflatable sealing ring 6 needs to be replaced, first remove the valve stem 3, the auxiliary shaft 4, the rotating frame 2 and the hemispherical valve core 5, then remove the third bolt 18 and remove the pressure ring 7, thereby replacing the inflatable sealing ring 6.This utility model has a reasonable structure. The hemispherical valve core 5 is connected to the ring body 201 of the rotating frame 2 by the second bolt 9. The hemispherical valve core 5 is a detachable structure. When the hemispherical valve core 5 needs to be replaced due to material wear or gas corrosion, only the hemispherical valve core 5 needs to be replaced. There is no need to replace the rotating frame 2 together, which greatly reduces the cost of use. The inner groove 15 of the inflatable sealing ring 6 cooperates with the second boss 13 and the barbed protrusion 14. The pressure ring 7 is pressed into the outer groove 16 of the inflatable sealing ring 6 by the third boss 17. The stability of the inflatable sealing ring 6 is greatly improved and it is not easy to fall off.

[0032] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0033] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dome valve with an air seal gasket that does not easily fall out, characterized by: The valve includes a cylindrical valve seat (1), a rotating frame (2), a valve stem (3), a secondary shaft (4), a hemispherical valve core (5), an inflatable sealing ring (6), and a pressure ring (7). The rotating frame (2) and the hemispherical valve core (5) are movably disposed within the cylindrical valve seat (1). The rotating frame (2) includes a ring body (201) and connecting feet (202). Connecting feet (202) are symmetrically arranged on both sides of the lower surface of the ring body (201). At the ends of the two connecting feet (202) away from the ring body (201), sleeves (203) parallel to the radial direction of the ring body (201) are provided. The sleeves (203) of the two connecting feet (202) are coaxial. The valve stem (3) is inserted into the sleeve (203) of one of the connecting feet (202) and fastened by a first bolt (8). The secondary shaft (4) is inserted into the sleeve (203) of the other connecting foot (202) and fastened by another first bolt (8). The valve stem (3) and the secondary shaft (4) are rotatably connected to the side wall of the cylindrical valve seat (1). The lower surface of the hemispherical valve core (5) is fastened to the ring body (201) by a second bolt (9). A through hole (10) is provided at the top of the cylindrical valve seat (1). An annular groove (11) is provided at the through hole (10). A first boss (12) and a second boss (13) are provided in the annular groove (11). A barb protrusion (14) is provided on the inner side of the second boss (13). An inflatable sealing ring (6) is provided in the annular groove (11). An inner groove (15) is provided on the upper surface of the inner side of the inflatable sealing ring (6). An outer groove (16) is provided on the lower surface of the outer side of the inflatable sealing ring (6). The inner groove (15) is provided on the upper surface of the inner side of the inflatable sealing ring (6). 5) The inner groove (15) and the second boss (13) cooperate with each other and form an air cavity between the inner groove (15) and the second boss (13). The pressure ring (7) is fastened to the first boss (12) by the third bolt (18). The pressure ring (7) is pressed on the lower surface of the inflatable sealing ring (6). The upper inner surface of the pressure ring (7) is provided with a third boss (17). The third boss (17) cooperates with the outer groove (16) of the inflatable sealing ring (6). The inner surface of the inflatable sealing ring (6) cooperates with the outer surface of the hemispherical valve core (5).

2. A dome valve with an air seal gasket that does not easily fall out according to claim 1, wherein: The cylindrical valve seat (1) is provided with sliding bearings (19) on both sides coaxially. The valve stem (3) and the auxiliary shaft (4) each pass through the corresponding sliding bearing (19) and cooperate with each other.

3. The dome valve of claim 1, wherein: The bottom of the cylindrical valve seat (1) is provided with a flange (20). On both sides of the cylindrical valve seat (1) and on both sides of the sliding bearing (19), there are first reinforcing plates (21). The bottom of the first reinforcing plates (21) is connected to the flange (20). The outer ends of the two first reinforcing plates (21) located on one side of the valve stem (3) are also provided with actuator mounting plates (22). A second reinforcing plate (23) is provided between the actuator mounting plate (22) and the first reinforcing plates (21).

4. The dome valve of claim 1, wherein: The ring (201) has several first connecting holes (204) parallel to the axial direction, and the lower surface of the hemispherical valve core (5) has several first screw holes (24). The first screw holes (24) correspond one-to-one with the first connecting holes (204) and are connected by a second bolt (9).

5. A dome valve with a non-detachable inflatable sealing ring according to claim 1, characterized in that: The hemispherical valve core (5) has a groove (25) inside.

6. A dome valve with a non-detachable inflatable sealing ring according to claim 1, characterized in that: The pressure ring (7) has several second connecting holes (26) parallel to the axial direction, and the lower surface of the first boss (12) has several second screw holes (27). The second screw holes (27) correspond one-to-one with the second connecting holes (26) and are connected by a third bolt (18).

7. A dome valve with a non-detachable inflatable sealing ring according to claim 1, characterized in that: The upper surface of the cylindrical valve seat (1) is provided with several third screw holes (28) in an annular shape.

8. A dome valve with a non-detachable inflatable sealing ring according to claim 1, characterized in that: The cylindrical valve seat (1) has an air passage (29) inside. One end of the air passage (29) passes through the second protrusion (13) and is connected to the air cavity between the inner groove (15) and the second protrusion (13). The other end of the air passage (29) is connected to the outside of the cylindrical valve seat (1). The outer end of the air passage (29) is also provided with an air pipe connection port (30).

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