Kettle bottom safe discharge angle valve

Abstract

The invention relates to a safe discharge angle valve for a kettle bottom. The valve comprises a valve body. The valve seat is arranged at the upper end of the valve body; the reset assembly comprises a support arranged at the upper end of the valve seat, a cylinder barrel installed at the upper end of the support and a cylinder cover connected with the upper end of the cylinder barrel, a piston is slidably connected in the cylinder barrel, and a spring is arranged in the cylinder barrel and used for providing elastic force for the valve element assembly to be close to the valve seat; the valve element assembly comprises a valve element and an upper valve rod, the valve element is matched with the valve seat, and the upper end and the lower end of the upper valve rod are connected with the piston and the upper end of the valve element respectively. The upper cover assembly comprises an upper cover, a guide sleeve and a corrugated pipe, and the corrugated pipe and the upper cover are connected to the guide sleeve; the upper end of the lower valve rod penetrates through the upper cover assembly and can abut against the lower end of the valve element, and the corrugated pipe is connected with the lower valve rod; the executing mechanism is arranged below the upper cover assembly and comprises a push rod connected with the lower end of the lower valve rod. The angle valve can quickly seal a container in emergency, and has the advantages of reliable sealing performance, easiness in maintenance and compact structure.

Description

Technical Field

[0001] This invention relates to the field of fluid control valve technology, and in particular to a bottom safety discharge angle valve. Background Technology

[0002] Leaks in bottom discharge valves installed on tanks storing toxic, flammable, or explosive fluids can lead to serious accidents such as fires, explosions, and poisoning. Therefore, the sealing performance of these valves is extremely critical. Gate valves and ball valves are commonly used for bottom discharge valves due to their excellent sealing performance. However, if unforeseen circumstances such as war or severe earthquakes damage these valves, large-scale leakage of the medium inside the tank can occur, with extremely serious consequences. Therefore, a bottom safety discharge angle valve is needed to address this problem in the field. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of traditional bottom discharge valves and to provide a bottom safety discharge angle valve. This angle valve can quickly close the container in an emergency and has the advantages of reliable sealing performance, easy maintenance, and compact structure.

[0004] To solve the above technical problems, the present invention provides a bottom safety discharge angle valve, comprising: Valve body; A valve seat is disposed at the upper end of the valve body; The reset assembly includes a bracket disposed on the upper end of the valve seat, a cylinder mounted on the upper end of the bracket, and a cylinder cover connected to the upper end of the cylinder. A piston and a spring are slidably connected inside the cylinder. A valve core assembly is disposed within the bracket, and a spring is disposed within the cylinder and used to provide an elastic force to the valve core assembly near the valve seat; the valve core assembly includes a valve core and an upper valve stem, the valve core cooperates with the valve seat, and the upper end and lower end of the upper valve stem are respectively connected to the piston and the upper end of the valve core; The upper cover assembly is disposed below the valve body. The upper cover assembly includes an upper cover, a guide sleeve, and a bellows. The bellows and the upper cover are respectively connected to the guide sleeve. The lower valve stem has its upper end inserted through the upper cover assembly and able to abut against the lower end of the valve core; the bellows is connected to the lower valve stem. An actuator is disposed below the upper cover assembly, and the actuator includes a push rod connected to the lower end of the lower valve stem; The spring is used to drive the piston to move the valve core assembly in the closing direction during gas loss or emergency conditions, so as to achieve safe cut-off of the medium at the bottom of the vessel.

[0005] In one embodiment of the present invention, the valve core assembly further includes a pressure plate, a sealing ring, a thrust nut, a valve stem, and a first internal hexagon screw. The upper valve stem is connected and locked to the piston by an upper hexagon thin nut. The lower end of the upper valve stem is connected to the valve core by the thrust nut. The pressure plate is connected to the lower end of the valve core by the first internal hexagon screw. The sealing ring is disposed between the pressure plate and the valve core.

[0006] In one embodiment of the present invention, a flange is provided above the valve body, the flange is used for welding connection with the on-site storage tank equipment, the valve seat is clamped between the valve body and the flange, and the valve body and the flange are connected and fastened by a first stud and a first nut.

[0007] In one embodiment of the present invention, sealing gaskets are respectively provided between the valve body and the valve seat, and between the valve seat and the flange; The valve seat is provided with a first lip weld at its outer peripheral end, and the flange is provided with a second lip weld at its outer peripheral end. The first lip weld and the second lip weld are connected by welding to form a seal.

[0008] In one embodiment of the present invention, the valve seat and the bracket are connected by a second internal hexagon screw, and a Lodilock anti-loosening washer is provided at the second internal hexagon screw to form an anti-loosening structure.

[0009] In one embodiment of the present invention, a stuffing box is provided at the lower end of the upper cover, and the lower valve stem passes through the stuffing box. A packing assembly, a packing gland, and a packing pressure plate are arranged sequentially from top to bottom in the stuffing box. The packing pressure plate is fastened to the upper cover by a second stud and a second nut.

[0010] In one embodiment of the present invention, the valve body and the upper cover are fastened together by a third bolt and a third nut; The upper valve stem is threadedly connected to the push rod and locked in place by a hexagonal thin nut.

[0011] In one embodiment of the present invention, the upper cover and the bellows are respectively fixed to the guide sleeve by welding; the bellows and the valve stem are fixed and sealed by welding.

[0012] In one embodiment of the present invention, the actuator is a pneumatic piston single-acting linear stroke mechanism, which is a positive-acting type, and the push rod extends outward after air is supplied.

[0013] In one embodiment of the present invention, a flat tenon anti-rotation structure is adopted between the valve core and the lower valve stem to limit the rotation of the valve core relative to the lower valve stem.

[0014] The technical solution of the present invention has the following advantages over the prior art: The present invention discloses a bottom safety discharge angle valve, which is an outward-expanding disc type angle valve with a spring-embedded structure, enabling rapid sealing and shut-off of the container in emergency situations; the overall structure is compact, occupies little space, and is easy to arrange in confined installation spaces.

[0015] The valve core disc and valve stem of this invention adopt a separable structure. Even if the external parts of the valve are damaged, the valve core can still reliably fit with the valve seat under the action of the spring, so as to achieve tight shut-off and improve failure safety.

[0016] The valve core of this invention adopts a detachable soft-seal sealing ring structure, which can meet the Class VI sealing requirements for a long time and has high sealing reliability; the sealing components are easy to replace, which facilitates inspection and maintenance and reduces downtime costs.

[0017] This invention adopts a flat tenon anti-rotation structure, which is reliable and can effectively suppress the rotation of the valve core assembly under the action of the dynamic torque of the medium, thus avoiding wear, jamming or structural damage caused by it. Attached Figure Description

[0018] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a front view of the bottom safety discharge angle valve of the present invention.

[0020] Figure 2 This is a first part of the diagram of the safety discharge angle valve at the bottom of the vessel according to the present invention.

[0021] Figure 3 This is a second part of the diagram of the bottom safety discharge angle valve of the present invention.

[0022] Figure 4 This is a view of the valve core assembly.

[0023] Figure 5 This is the view of the top cover component.

[0024] Figure 6 This is a view of the flange.

[0025] Figure 7 This is a view of the valve seat.

[0026] Figure 8 This is a view of a single-acting linear actuator with a pneumatic piston.

[0027] Explanation of reference numerals on the accompanying drawings: 1. Valve body; 2. First stud; 3. First nut; 4. Valve seat; 4.1. First lip weld plate; 5. Flange; 5.1. Second lip weld plate; 6. Valve core assembly; 6.1 Valve core; 6.2 Pressure plate; 6.3 Sealing ring; 6.4 Thrust nut; 6.5 Upper valve stem; 6.6 First internal hex screw; 7. Lode Lock anti-loosening washer; 8. Second internal hex socket screw; 9. Bracket; 10. Cylinder; 11. Piston; 12. Spring; 13. Upper hex nut; 14. Cylinder head; 15. Lower valve stem; 16. Top cover assembly; 16.1. Top cover; 16.1.1. Stuffing gland; 16.2. Guide sleeve; 16.3. Bellows; 17. Hex head bolt; 18. Packing assembly; 19. Third nut; 20. Third stud; 21. Packing gland; 22. Packing pressure plate; 23. Second nut; 24. Second stud; 25. Lower hex head nut; 26. Actuator; 26.1. Push rod. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0029] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0030] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0032] Reference Figures 1 to 3As shown, a bottom safety discharge angle valve of the present invention includes: Valve body 1; Valve seat 4 is disposed at the upper end of the valve body 1; The reset assembly includes a bracket 9 disposed on the upper end of the valve seat 4, a cylinder 10 mounted on the upper end of the bracket 9, and a cylinder cover 14 connected to the upper end of the cylinder 10. A piston 11 and a spring 12 are slidably connected inside the cylinder 10. A valve core assembly 6 is disposed within the bracket 9, and a spring 12 is disposed within the cylinder 10 and is used to provide elastic force to the valve core assembly 6 near the valve seat 4; the valve core assembly 6 includes a valve core 6.1 and an upper valve stem 6.5, the valve core 6.1 cooperates with the valve seat 4, and the upper end and lower end of the upper valve stem 6.5 are respectively connected to the piston 11 and the upper end of the valve core 6.1; The upper cover assembly 16 is disposed below the valve body 1. The upper cover assembly 16 includes an upper cover 16.1, a guide sleeve 16.2 and a bellows 16.3. The bellows 16.3 and the upper cover 16.1 are respectively connected to the guide sleeve 16.2. The lower valve stem 15 has its upper end passing through the upper cover assembly 16 and abutting against the lower end of the valve core 6.1. The bellows 16.3 is connected to the lower valve stem 15. The actuator 26 is located below the upper cover assembly 16, and the actuator 26 includes a push rod 26.1 connected to the lower end of the lower valve stem 15; The spring 12 is used to drive the piston 11 to move the valve core assembly 6 in the closing direction during gas loss or emergency conditions, so as to achieve safe cut-off of the medium at the bottom of the vessel.

[0033] By using a built-in spring 12 structure, the spring 12 is arranged inside the cylinder 10 inside the storage tank equipment. In the event of gas loss or emergency conditions, it drives the valve core assembly 6 to move in the closing direction to achieve rapid sealing and cutting off of the container. The overall structure is compact, occupies little space, and is suitable for arrangement in limited installation space.

[0034] In one embodiment, refer to Figure 4 As shown, the valve core assembly 6 further includes a pressure plate 6.2, a sealing ring 6.3, a thrust nut 6.4, a valve stem, and a first internal hexagon screw 6.6. The upper valve stem 6.5 is connected and locked to the piston 11 by an upper hexagon thin nut 13. The lower end of the upper valve stem 6.5 is connected to the valve core 6.1 by the thrust nut 6.4. The pressure plate 6.2 is connected to the lower end of the valve core 6.1 by the first internal hexagon screw 6.6. The sealing ring 6.3 is disposed between the pressure plate 6.2 and the valve core 6.1.

[0035] The valve core assembly 6 is a detachable soft-seal structure. The sealing ring 6.3 is used to cooperate with the valve seat 4 to form a sealing pair to meet the Class VI sealing requirements for a long time and improve sealing reliability. The angle valve as a whole can be disassembled and maintained outside the storage tank equipment without entering the storage tank, which facilitates replacement and maintenance and reduces maintenance risks.

[0036] In one embodiment, a flange 5 is provided above the valve body 1. The flange 5 is used for welding connection with the on-site storage tank equipment. The valve seat 4 is clamped between the valve body 1 and the flange 5. The valve body 1 and the flange 5 are connected and fastened by a first stud 2 and a first nut 3.

[0037] In one embodiment, refer to Figure 6 , Figure 7 As shown, sealing gaskets are provided between the valve body 1 and the valve seat 4, and between the valve seat 4 and the flange 5; The valve seat 4 has a first lip weld 4.1 on its outer periphery, and the flange 5 has a second lip weld 5.1 on its outer periphery. The first lip weld 4.1 and the second lip weld 5.1 are welded together to form a seal. This ensures that even if the external structure is damaged, the valve core 6.1 can still reliably fit against the valve seat 4 under the action of the spring 12, achieving tight shut-off of the valve and improving failure safety.

[0038] In one embodiment, the valve seat 4 and the bracket 9 are threaded together by a second hexagon socket screw 8, and a Lodilock anti-loosening washer 7 is provided at the second hexagon socket screw 8 to form an anti-loosening structure.

[0039] In one embodiment, the lower end of the upper cover 16.1 is provided with a stuffing box 16.1.1, and the lower valve stem 15 passes through the stuffing box 16.1.1. The stuffing box 16.1.1 is provided with a packing assembly 18, a packing gland 21, and a packing pressure plate 22 arranged sequentially from top to bottom. The packing pressure plate 22 is fastened to the upper cover 16.1 by a second stud 24 and a second nut 23.

[0040] In one embodiment, the valve body 1 and the upper cover 16.1 are connected and fastened by a third bolt and a third nut 19; The upper valve stem 6.5 is threadedly connected to the push rod 26.1 and locked in place by a hexagonal thin nut.

[0041] In one embodiment, refer to Figure 5 As shown, the upper cover 16.1 and the bellows 16.3 are respectively fixed to the guide sleeve 16.2 by welding; the bellows 16.3 and the valve stem are fixed and sealed by welding.

[0042] In one embodiment, refer to Figure 8 As shown, the actuator 26 adopts a single-acting linear stroke mechanism of pneumatic piston 11, which is a positive-acting type. After air is supplied, the push rod 26.1 extends outward.

[0043] In one embodiment, a flat-twig anti-rotation structure is used between the valve core 6.1 and the lower valve stem 15 to limit the rotation of the valve core 6.1 relative to the lower valve stem 15. By providing anti-rotation limiting for the valve core assembly 6, unintended rotation under the action of the hydrodynamic torque of the medium is suppressed, thereby avoiding wear, jamming, or structural failure caused by rotation.

[0044] Under normal operating conditions, the actuator 26 generates thrust after the air source is supplied, causing the push rod 26.1 to drive the valve stem and valve core assembly 6 to overcome the restoring force of the spring 12 and keep the valve in the open state, thereby realizing the discharge or connection control of the medium at the bottom of the vessel.

[0045] In emergency situations, such as war or earthquakes that cause gas supply interruption or require emergency shut-off, the actuator 26 loses its gas supply driving force, the lower valve stem 15 retracts, the spring 12 releases its stored energy and drives the piston 11 and valve core assembly 6 to move in the closing direction, so that the valve core 6.1 and the valve seat 4 quickly fit together, completing the automatic sealing and shut-off of the container and meeting the fail-safe requirements.

[0046] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A safety discharge angle valve for the bottom of a vessel, characterized in that, include: Valve body (1); Valve seat (4) is disposed at the upper end of the valve body (1); The reset assembly includes a bracket (9) disposed on the upper end of the valve seat (4), a cylinder (10) mounted on the upper end of the bracket (9), and a cylinder head (14) connected to the upper end of the cylinder (10). A piston (11) is slidably connected inside the cylinder (10) and a spring (12) is provided. A valve core assembly (6) is disposed within the bracket (9), and a spring (12) is disposed within the cylinder (10) and is used to provide elastic force for the valve core assembly (6) to approach the valve seat (4); the valve core assembly (6) includes a valve core (6.1) and an upper valve rod (6.5), the valve core (6.1) cooperates with the valve seat (4), and the upper end and lower end of the upper valve rod (6.5) are respectively connected to the piston (11) and the upper end of the valve core (6.1); The upper cover assembly (16) is disposed below the valve body (1). The upper cover assembly (16) includes an upper cover (16.1), a guide sleeve (16.2) and a bellows (16.3). The bellows (16.3) and the upper cover (16.1) are respectively connected to the guide sleeve (16.2). The lower valve stem (15) has its upper end inserted through the upper cover assembly (16) and can abut against the lower end of the valve core (6.1). The bellows (16.3) is connected to the lower valve stem (15). An actuator (26) is disposed below the upper cover assembly (16), and the actuator (26) includes a push rod (26.1) connected to the lower end of the lower valve stem (15). The spring (12) is used to drive the piston (11) to move the valve core assembly (6) in the closing direction during gas loss or emergency conditions, so as to achieve safe cut-off of the medium at the bottom of the vessel.

2. The safety discharge angle valve at the bottom of the vessel according to claim 1, characterized in that, The valve core assembly (6) further includes a pressure plate (6.2), a sealing ring (6.3), a thrust nut (6.4), a valve stem, and a first internal hexagon screw (6.6). The upper valve stem (6.5) is connected and locked to the piston (11) by an upper hexagon thin nut (13). The lower end of the upper valve stem (6.5) is connected to the valve core (6.1) by the thrust nut (6.4). The pressure plate (6.2) is connected to the lower end of the valve core (6.1) by the first internal hexagon screw (6.6). The sealing ring (6.3) is disposed between the pressure plate (6.2) and the valve core (6.1).

3. The safety discharge angle valve at the bottom of the vessel according to claim 1, characterized in that, The valve body (1) is provided with a flange (5) on its upper part. The flange (5) is used for welding connection with the on-site storage tank equipment. The valve seat (4) is sandwiched between the valve body (1) and the flange (5). The valve body (1) and the flange (5) are connected and fastened by the first stud (2) and the first nut (3).

4. The safety discharge angle valve at the bottom of the vessel according to claim 3, characterized in that, Sealing gaskets are provided between the valve body (1) and the valve seat (4), and between the valve seat (4) and the flange (5); The valve seat (4) has a first lip weld (4.1) on its outer periphery and a second lip weld (5.1) on its outer periphery. The first lip weld (4.1) and the second lip weld (5.1) are connected by welding to form a seal.

5. A bottom safety discharge angle valve according to claim 1, characterized in that, The valve seat (4) and the bracket (9) are connected by a second internal hexagon screw (8), and a Lodilock anti-loosening washer (7) is provided at the second internal hexagon screw (8) to form an anti-loosening structure.

6. The safety discharge angle valve at the bottom of the vessel according to claim 1, characterized in that, The upper cover (16.1) is provided with a stuffing box (16.1.1) at its lower end. The lower valve stem (15) passes through the stuffing box (16.1.1). The stuffing box (16.1.1) is provided with a packing group (18), a packing gland (21), and a packing pressure plate (22) arranged from top to bottom. The packing pressure plate (22) is fastened to the upper cover (16.1) by a second stud (24) and a second nut (23).

7. A bottom safety discharge angle valve according to claim 1, characterized in that, The valve body (1) and the upper cover (16.1) are connected and fastened by a third bolt and a third nut (19); The upper valve stem (6.5) is threadedly connected to the push rod (26.1) and locked by a hexagonal thin nut.

8. A bottom safety discharge angle valve according to claim 1, characterized in that, The upper cover (16.1) and the bellows (16.3) are respectively fixed to the guide sleeve (16.2) by welding; the bellows (16.3) and the valve stem are fixed and sealed by welding.

9. A bottom safety discharge angle valve according to claim 1, characterized in that, The actuator (26) adopts a single-acting linear mechanism of pneumatic piston (11), which is positive-acting. After air is supplied, the push rod (26.1) extends outward.

10. A bottom safety discharge angle valve according to claim 1, characterized in that, The valve core (6.1) and the lower valve stem (15) are connected by a flat tenon anti-rotation structure to limit the rotation of the valve core (6.1) relative to the lower valve stem (15).

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