A seal device for a primary air powder regulating valve

Abstract

The present application relates to the technical field of air powder regulating valve, and particularly relates to a sealing device for primary air powder regulating valve, which comprises a main body, a valve rod, a butt joint rod, a fixing foot, a first driving bearing, a second driving bearing, a sealing bearing seat, a connecting rod and an outer sealing mechanism, the valve rod, the butt joint rod and the connecting rod are fixedly connected in a transverse mode, the fixing foot is fixedly arranged at the outer sides of the main body, the first driving bearing and the second driving bearing are embedded in the main body, and are movably sleeved with the valve rod and the butt joint rod. When the valve rod and the butt joint rod rotate after being sleeved with the first driving bearing, the first driving bearing is driven to rotate, at this moment, the sealing bearing seat arranged around the edge of the first driving bearing enhances the sealing property of the outer side of the first driving bearing, and the first driving bearing is positioned to avoid the center of gravity from deviating during rotation.

Description

Technical Field

[0001] This invention relates to the technical field of air-powder regulating valves, and more specifically to a sealing device for a primary air-powder regulating valve. Background Technology

[0002] The air-powder regulating valve is an important component for regulating the powder supply flow rate in the pipeline.

[0003] In actual use, the pipeline for conveying air and powder is filled with a large number of fine powder particles with a particle size R90 of less than 15%. Under these conditions, the air pressure reaches 15 kPa, the speed exceeds 30 m / s, and the temperature can reach 100°C. Because the existing old-style regulating valve drive shaft bearing housing is an integrated structure, when the powder particles break through the seals at each level, they will directly enter the bearing, causing the bearing balls to be filled with powder particles, resulting in bearing failure, drive shaft jamming, and the main shaft not being able to rotate. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a sealing device for a primary air-powder regulating valve. In practical use, this device can effectively isolate powder particles from the internal structure of the valve body, preventing powder particles from breaking through the seal and directly entering the bearing. This effectively prevents the bearing balls inside the valve body from failing, the drive shaft from jamming, and the main shaft from being unable to rotate.

[0005] To solve the above-mentioned technical problems, the present invention proposes the following technical solution:

[0006] A sealing device for a primary air-powder regulating valve includes a main body, a valve stem, a connecting rod, a fixed foot, a first drive bearing, a second drive bearing, a sealing bearing seat, a connecting rod, and an outer sealing mechanism. The valve stem, the connecting rod, and the connecting rod are horizontally fixedly connected. The fixed foot is fixedly disposed at both ends of the outer side of the main body. The first and second drive bearings are embedded inside the main body and are movably connected to the valve stem and the connecting rod. The sealing bearing seat is disposed corresponding to the first drive bearing. The outer sealing mechanism as a whole includes a detachable sealing seat, a sealing layer, and a fixing screw. The detachable sealing seat and the sealing layer are fixedly connected. The fixing screw passes through the detachable sealing seat and is sleeved with the fixed foot.

[0007] Furthermore, the sealed bearing housing is arranged in a ring shape inside the main body, while its side section is trapezoidal. The sealed bearing housing is provided in two sets, and the inner surface is provided with an annular lubrication groove, with small-sized balls inside the lubrication groove.

[0008] Furthermore, the edge of the sealed bearing housing is configured to surround half of the outer side of the first drive bearing.

[0009] Furthermore, both the detachable sealing seat and the sealing layer are arranged in matching unequal annular shapes, and the front end of the detachable sealing seat is arranged in a transverse cylindrical shape, which is simultaneously connected to the connecting rod.

[0010] Furthermore, the sealing layer is located inside the detachable sealing seat and is set as a latex sealing layer. The top of the detachable sealing seat is detachably connected to the front end of the main body via a fixing screw.

[0011] Furthermore, an internal sealing mechanism is fixedly installed inside the main body. The internal sealing mechanism includes a closed seat, a first sealing ring, a second sealing ring, a guide ring, a connecting foot, a discharge cavity, and a discharge port. The first sealing ring and the second sealing ring are fixedly connected. The guide ring and the first sealing ring are arranged adjacent to each other. The guide ring and the connecting foot are fixedly connected. The discharge cavity is located between the first sealing ring and the guide ring. The discharge port is located at the top of the discharge cavity. At the same time, the discharge port is opened on the outer surface of the main body.

[0012] Furthermore, the closed seat is provided in two sets, which are vertically embedded in the main body, and the inner surface of the closed seat is provided with limiting grooves for the first sealing ring and the second sealing ring.

[0013] Furthermore, the first sealing ring and the second sealing ring are fixedly connected by a rubber layer, and the first sealing ring and the second sealing ring are arranged vertically in a "π" shape. The outer ends of the first sealing ring and the second sealing ring are embedded in the closed seat.

[0014] Furthermore, the guide ring is fixedly connected to the inside of the main body via a connecting foot. At the same time, the connecting foot is set outwardly at an angle and fixedly connected to the inside of the main body. The guide ring is set in a conical ring shape, with the outer side inclined upward.

[0015] Furthermore, the overall space of the outlet cavity is formed by the guide ring and the first sealing ring, located between the guide ring and the first sealing ring, while four sets of outlets are opened on the outer surface of the main body.

[0016] As can be seen from the above technical solution, the beneficial effects of the present invention are as follows:

[0017] In this invention, after the first drive bearing is sleeved with the valve stem and the connecting rod, the rotation of the valve stem and the connecting rod drives the first drive bearing to rotate. At this time, the sealing of the outer part of the first drive bearing is enhanced by the sealing bearing seat surrounding the edge of the first drive bearing. At the same time, the first drive bearing is positioned during rotation to prevent the center of gravity from shifting during the rotation of the first drive bearing. In addition, the small-sized balls on the inner side of the sealing bearing seat, together with the annular lubrication groove, enhance the smoothness and durability of the first drive bearing during rotation.

[0018] This invention firstly uses a detachable sealing seat to facilitate the easy disassembly of the entire outer sealing mechanism. When a small amount of powder particles are present in the outer sealing mechanism due to the use of the regulating valve, it is easy to disassemble and clean them. At the same time, the sealing layer set on the inner side enhances the sealing performance of the inner part of the outer sealing mechanism, preventing powder particles from entering the main body.

[0019] After the first sealing ring and the second sealing ring are installed, the present invention achieves the effect of limiting and fixing the corresponding first sealing ring and the second sealing ring by sealing the seat, thereby enhancing the sealing effect of the first sealing ring and the second sealing ring on the powder particles.

[0020] The present invention forms an initial inner sealing structure through a first sealing ring and a second sealing ring. After the connecting rod and the connecting rod pass through the first sealing ring and the second sealing ring, the sealing effect is enhanced by the first sealing ring and the second sealing ring, forming a double protection. Even after passing through the first sealing ring, the powder particles stay at the top position between the first sealing ring and the second sealing ring. At this time, the second sealing ring prevents the powder particles from penetrating further.

[0021] The present invention further seals the inner sealing mechanism by forming a conical guide ring. When the powder particles enter the discharge cavity after passing through the first sealing ring, they move upward along the outside of the guide ring as the airflow pressure inside the main body changes, and are then discharged.

[0022] As the internal airflow pressure changes, the powder particles move upward along the outer side of the guide ring. At this time, the discharge port facilitates the outward discharge of the powder particles, preventing them from directly contacting the bearing valve stem structure inside the main body. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 This is a cross-sectional view of the overall structure of the present invention;

[0025] Figure 2 This is a front view of the connection of the outer sealing mechanism in this invention;

[0026] Figure 3 This is a cross-sectional view of the connection of the inner sealing mechanism in this invention.

[0027] Figure label:

[0028] 1-Main body, 2-Valve stem, 3-Connecting rod, 4-Fixing foot, 5-First drive bearing, 6-Sealed bearing seat, 7-Second drive bearing, 8-Connecting rod, 9-Outer sealing mechanism, 10-Inner sealing mechanism, 11-Removable sealing seat, 12-Sealing layer, 13-Fixing screw, 14-Closed seat body, 15-First sealing ring, 16-Second sealing ring, 17-Guide ring, 18-Connecting foot, 19-Outlet cavity, 20-Outlet port. Detailed Implementation

[0029] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0030] See Figure 1-3 As shown, a sealing device for a primary air-powder regulating valve includes a main body 1, a valve stem 2, a connecting rod 3, a fixing foot 4, a first drive bearing 5, a second drive bearing 7, a sealing bearing seat 6, a connecting rod 8, and an outer sealing mechanism 9. The valve stem 2, the connecting rod 3, and the connecting rod 8 are horizontally fixedly connected. The fixing foot 4 is fixedly disposed at both ends of the outer side of the main body 1. The first drive bearing 5 and the second drive bearing 7 are embedded inside the main body 1 and are movably connected to the valve stem 2 and the connecting rod 3. The sealing bearing seat 6 is disposed corresponding to the first drive bearing 5. The outer sealing mechanism 9 includes a detachable sealing seat 11, a sealing layer 12, and a fixing screw 13. The detachable sealing seat 11 and the sealing layer 12 are fixedly connected. The fixing screw 13 passes through the detachable sealing seat 11 and is sleeved with the fixing foot 4.

[0031] In this embodiment, the sealed bearing housing 6 is arranged in a ring shape inside the main body 1, and its side cross-section is arranged in a trapezoidal shape. The sealed bearing housing 6 is arranged in two sets, and the inner surface is provided with an annular lubrication groove, with small-sized balls inside the lubrication groove.

[0032] In this embodiment, the edge of the sealed bearing housing 6 is arranged to surround half of the outer side of the first drive bearing 5;

[0033] After the first drive bearing 5 is sleeved with the valve stem 2 and the connecting rod 3, the valve stem 2 and the connecting rod 3 rotate, which drives the first drive bearing 5 to rotate. At this time, the sealing bearing seat 6 surrounding the edge of the first drive bearing 5 enhances the sealing of the outer position of the first drive bearing 5. At the same time, the first drive bearing 5 is positioned during rotation to prevent the center of gravity of the first drive bearing 5 from shifting during rotation. In addition, the small-sized balls on the inner side of the sealing bearing seat 6, together with the annular lubrication groove, enhance the smoothness and service life of the first drive bearing 5 during rotation.

[0034] In this embodiment, both the detachable sealing seat 11 and the sealing layer 12 are arranged in matching unequal annular shapes. The front end of the detachable sealing seat 11 is arranged in a transverse cylindrical shape and is simultaneously connected to the connecting rod 8.

[0035] In this embodiment, the sealing layer 12 is located inside the detachable sealing seat 11 and is set as a latex sealing layer. The top of the detachable sealing seat 11 is detachably connected to the front end of the main body 1 by a fixing screw 13.

[0036] Firstly, the detachable sealing seat 11 facilitates the easy disassembly of the entire outer sealing mechanism 9. When a small amount of powder particles are present in the outer sealing mechanism 9 due to the use of the regulating valve, it is easy to disassemble and clean them. At the same time, the sealing layer 12 provided on the inner side enhances the sealing performance of the inner side of the outer sealing mechanism 9, preventing powder particles from entering the body 1.

[0037] In this embodiment, an inner sealing mechanism 10 is fixedly installed inside the main body 1. The inner sealing mechanism 10 includes a closed seat 14, a first sealing ring 15, a second sealing ring 16, a guide ring 17, a connecting foot 18, a discharge cavity 19, and a discharge port 20. The first sealing ring 15 and the second sealing ring 16 are fixedly connected. The guide ring 17 and the first sealing ring 15 are arranged adjacent to each other. The guide ring 17 and the connecting foot 18 are fixedly connected. The discharge cavity 19 is located between the first sealing ring 15 and the guide ring 17. The discharge port 20 is located at the top of the discharge cavity 19. At the same time, the discharge port 20 is opened on the outer surface of the main body 1.

[0038] Two sets of closed seat 14 are set as a whole, vertically embedded in the main body 1, and the inner surface of the closed seat 14 is provided with limiting grooves for the first sealing ring 15 and the second sealing ring 16.

[0039] After the first sealing ring 15 and the second sealing ring 16 are installed, the sealing seat 14 achieves the effect of limiting and fixing the corresponding first sealing ring 15 and the second sealing ring 16, thereby enhancing the sealing effect of the first sealing ring 15 and the second sealing ring 16 on the powder particles.

[0040] The first sealing ring 15 and the second sealing ring 16 are fixedly connected by a rubber layer. The first sealing ring 15 and the second sealing ring 16 are arranged vertically in a "π" shape. The outer ends of the first sealing ring 15 and the second sealing ring 16 are embedded in the closed seat 14.

[0041] The first sealing ring 15 and the second sealing ring 16 form an initial inner sealing structure. After the connecting rod 3 and the connecting rod 8 pass through the first sealing ring 15 and the second sealing ring 16, the sealing effect is enhanced by the first sealing ring 15 and the second sealing ring 16, and a double protection is formed. Even after passing through the first sealing ring 15, the powder particles stay at the top position between the first sealing ring 15 and the second sealing ring 16. At this time, the second sealing ring 16 prevents the powder particles from penetrating further.

[0042] The guide ring 17 is fixedly connected to the inside of the main body 1 via the connecting foot 18. At the same time, the connecting foot 18 is inclined outward and fixedly connected to the inside of the main body 1. The guide ring 17 is a conical ring with an upward inclined outer side.

[0043] The inner sealing mechanism 10 is further sealed by the conical guide ring 17. When the powder particles enter the outlet cavity 19 after passing through the first sealing ring 15, they move upward along the outside of the guide ring 17 as the airflow pressure inside the main body 1 changes, and are then discharged.

[0044] The overall space of the outlet cavity 19 is formed by the guide ring 17 and the first sealing ring 15, and is located between the guide ring 17 and the first sealing ring 15. At the same time, four sets of outlet ports 20 are opened on the outer surface of the main body 1.

[0045] As the airflow pressure inside the main body 1 changes, the powder particles move upward along the outer side of the guide ring 17. At this time, the discharge port 20 facilitates the outward discharge of the powder particles, preventing the powder particles from directly contacting the bearing valve stem structure inside the main body 1.

[0046] Working principle: The valve body of the air-powder regulating valve is connected to the housing of the electric actuator through the valve seat. The electric actuator is connected to the external valve plate through the valve stem 2, docking rod 3 and connecting rod 8 inside the main body 1, and drives the external valve plate to rotate. At this time, the sealing area is formed by the first sealing ring 15, the second sealing ring 16 and the outlet ring 17. At the same time, the outlet cavity 19 is formed between the first sealing ring 15 and the outlet ring 17, so that even if a small amount of powder particles break through the first sealing ring 15 and the second sealing ring 16, they will be discharged directly to the outside through the outlet cavity 19 and the outlet 20, and will not enter the valve stem bearing position inside the main body 1. This greatly extends the service life of the drive bearing system. At the same time, the outer sealing mechanism 9, which is detachably set, further prevents powder particles from penetrating into the interior of the main body 1.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A sealing device for primary air powder regulating valve, comprising a main body (1), a valve stem (2), a butt joint stem (3), a fixing foot (4), a first driving bearing (5), a second driving bearing (7), a sealing bearing seat (6), a connecting stem (8) and an outer sealing mechanism (9), characterized in that: The valve stem (2) and the butt rod (3) and the connecting rod (8) are transversely fixedly connected, the fixed foot (4) is fixedly arranged at the outer side of the two ends of the main body (1), the first drive bearing (5) and the second drive bearing (7) are embedded in the inside of the main body (1), and are movably sleeved with the valve stem (2) and the butt rod (3), the sealing bearing seat (6) is arranged corresponding to the first drive bearing (5), the outer side sealing mechanism (9) comprises a detachable sealing seat (11), a sealing layer (12) and a fixed screw rod (13), the detachable sealing seat (11) and the sealing layer (12) are fixedly connected, and the fixed screw rod (13) penetrates through the detachable sealing seat (11) and is sleeved with the fixed foot (4); The inside of the main body (1) is fixedly provided with an inner side sealing mechanism (10), the inner side sealing mechanism (10) comprises a closed seat body (14), a first sealing ring (15), a second sealing ring (16), a guide ring (17), a connecting foot (18), a guide cavity (19) and a guide outlet (20), the first sealing ring (15) and the second sealing ring (16) are fixedly connected, the guide ring (17) is arranged adjacent to the first sealing ring (15), the guide ring (17) and the connecting foot (18) are fixedly connected, the guide cavity (19) is located between the first sealing ring (15) and the guide ring (17), and the guide outlet (20) is located at the top of the guide cavity (19) and is arranged on the outer side surface of the main body (1); The closed seat body (14) is arranged in two groups and is vertically embedded in the inside of the main body (1), and the inner side surface of the closed seat body (14) is provided with a limiting groove for the first sealing ring (15) and the second sealing ring (16); The first sealing ring (15) and the second sealing ring (16) are fixedly connected through a rubber layer, and the first sealing ring (15) and the second sealing ring (16) are vertically arranged in the shape of "π". The guide ring (17) is fixedly connected with the inside of the main body (1) through the connecting foot (18), the connecting foot (18) is outwardly and obliquely arranged, and the guide ring (17) is conically arranged and obliquely arranged upwards. The guide cavity (19) is formed by the guide ring (17) and the first sealing ring (15), and is located between the guide ring (17) and the first sealing ring (15), and four groups of guide outlets (20) are arranged on the outer side surface of the main body (1).

2. A seal assembly for a primary air pulverizer damper valve as defined in claim 1 wherein: The sealing bearing seat (6) is annularly arranged in the inside of the main body (1), and the side section thereof is trapezoidal, the sealing bearing seat (6) is arranged in two groups, the inner side surface thereof is provided with an annular lubricating groove, and small-sized balls are arranged in the lubricating groove.

3. A seal assembly for a primary air pulverizer damper valve as defined in claim 2 wherein: The edge of the sealing bearing seat (6) is arranged in half of the outer side of the first drive bearing (5).

4. A seal assembly for a primary air pulverizer damper valve as defined in claim 1 wherein: The detachable sealing seat (11) and the sealing layer (12) are arranged in the form of a matched unequal ring, the front end of the detachable sealing seat (11) is transversely and cylindrically arranged, and the front end is sleeved with the connecting rod (8).

5. A seal assembly for a primary air pulverizer damper valve as defined in claim 4 wherein: The sealing layer (12) is located at the inner side of the detachable sealing seat (11), is set as a latex sealing layer, and the top of the detachable sealing seat (11) is detachably and connectively installed with the front end of the main body (1) through the fixing screw rod (13).

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