Redundancy protection device of gas-liquid control valve

Abstract

The utility model discloses a redundancy protection device of a gas-liquid control valve, which relates to the technical field of protection devices and comprises a valve pipe, flange rings are fixedly connected to the front end and the rear end of the valve pipe, a ball valve core is arranged in the valve pipe, a driving component is arranged on a mounting table above the valve pipe, a reset shell is vertically and fixedly connected to the lower part of the valve pipe, and a reset component is arranged in the reset shell. The upper and lower ends of the ball valve core are respectively connected with a driving component and a resetting component; according to the utility model, through the cooperation of the reset assembly and the ball valve core, the ball valve core can be automatically driven in time to rotate to close a flow channel and protect downstream equipment in case of sudden power failure, so that the practicability is improved, and the redundancy protection capability is realized; through a quick dismounting structure of the reset assembly, a reset structure can be conveniently and quickly replaced at regular intervals, so that stable operation of the reset structure is ensured, the practicability is improved, and the capability of stably triggering redundancy protection by the device is realized; finally, the problem of protection capability failure caused by difficult disassembly and assembly of an internal reset structure of existing equipment due to aging is solved.

Description

Technical Field

[0001] This utility model relates to the field of protection device technology, and in particular to a redundant protection device for a gas-liquid control valve. Background Technology

[0002] Redundant protection devices for gas-liquid control valves are a safety design aimed at ensuring that the valve can still operate safely and reliably or enter a preset safe state when the main control system fails. There are many types of redundant protection structures, among which mechanical protection structures that do not require external power are more commonly used because most emergencies are caused by the sudden termination of the driving energy. Among existing mechanical protection structures, the spring return structure is the most widely used due to its stable operation, simple structure, and low cost. However, when the spring return structure is stretched for a long time, it will age and lose its elasticity, resulting in the failure of the protection capability. Therefore, this utility model improves the existing equipment to address the above problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a redundant protection device for a gas-liquid control valve.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a redundant protection device for a gas-liquid control valve, comprising a valve tube, flange rings fixedly connected to both the front and rear ends of the valve tube, a ball valve core provided inside the valve tube, a drive assembly provided on the mounting platform above the valve tube, a reset shell vertically fixedly connected below the valve tube, a reset assembly provided inside the reset shell, and the drive assembly and the reset assembly respectively connected to the upper and lower ends of the ball valve core.

[0005] Preferably, the drive assembly includes a valve stem, which is mounted and fixed above the ball valve core, and the top end of the valve stem passes through the valve tube and is fixedly connected to a driven helical gear.

[0006] Preferably, a driving helical gear is meshed with one side of the driven helical gear, and a motor is fixedly connected to one side of the driving helical gear. The motor is mounted and fixed on the transmission box, and the transmission box is mounted and fixed on the mounting base above the valve pipe.

[0007] Preferably, the reset assembly includes a reset shell, which is a hollow tubular structure. The reset shell is vertically fixed to the lower part of the outer side of the reset shell, and a sealing plate is fitted on the bottom surface of the reset shell.

[0008] Preferably, a limiting block is provided on one side of the sealing plate, the limiting block is fixed to the lower end of the inner side of the reset shell, and a torsion spring is provided inside the reset shell.

[0009] Preferably, the inner side of the torsion spring is provided with a reset rod, the reset rod is fixedly installed on the sealing plate, the top surface of the reset rod is connected to a plug block by a thread, the top surface of the plug block is connected to the lower side of the outer side of the valve tube by a thread, the outer side of the lower end of the torsion spring abuts against the limiting block, and the upper end surface of the torsion spring passes through the plug block and is fixed on the plug block.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the cooperation of the reset component and the ball valve core, this utility model facilitates timely and automatic rotation of the ball valve core to close the flow channel in the event of a sudden power outage, protecting downstream equipment, thus improving practicality and achieving redundant protection capability. The quick-disassembly structure of the reset component facilitates periodic and rapid replacement of the reset structure, ensuring stable operation of the reset structure, improving practicality, and achieving the ability of the device to stably trigger redundant protection. Ultimately, it solves the problem of aging and difficult disassembly of the internal reset structure in existing equipment, leading to protection failure. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0012] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the device proposed in this utility model;

[0013] Figure 2 This is a cross-sectional view of the overall structure of the device proposed in this utility model;

[0014] Figure 3 This is a three-dimensional schematic diagram of the reset component structure proposed in this utility model;

[0015] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the reset component proposed in this utility model;

[0016] Figure 5 This is a cross-sectional view of the reset component structure proposed in this utility model.

[0017] The numbers in the diagram are: 1. Valve pipe; 2. Ball head valve core; 3. Valve stem; 4. Transmission box; 5. Motor; 6. Driving helical gear; 7. Driven helical gear; 8. Reset housing; 9. Sealing plate; 10. Limit block; 11. Torsion spring; 12. Reset rod; 13. Insertion block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example: See Figure 1-5 This utility model discloses a redundant protection device for a gas-liquid control valve, comprising a valve tube 1, with flange rings fixed to both ends of the valve tube 1. A ball valve core 2 is located inside the valve tube 1. A drive assembly is mounted on a mounting platform above the valve tube 1. A reset shell 8 is vertically fixed below the valve tube 1, and a reset assembly is located inside the reset shell 8. The upper and lower ends of the ball valve core 2 are respectively connected to the drive assembly and the reset assembly. The modular design facilitates the addition of functional components to the device, improving its practicality. The drive assembly includes a valve stem 3, which is mounted and fixed above the ball valve core 2. The top of the valve stem 3 passes through the valve tube 1 and is fixedly connected to a driven helical gear 7. A driving helical gear 6 is meshed with one side of the driven helical gear 7, and a motor 5 is fixedly connected to one side of the driving helical gear 6. The motor 5 is mounted and fixed on a transmission box 4, which is mounted and fixed on a mounting base above the valve tube 1. Through the cooperation of the drive assembly and the ball valve core 2, the flow rate can be automatically controlled, improving practicality.

[0020] In this utility model, to solve the problem of protection failure caused by the difficulty of disassembling and reassembling the aging internal reset structure of existing equipment, the following technical solution is adopted: The reset assembly includes a reset shell 8, which is a hollow tubular structure. The reset shell 8 is vertically fixed to the lower outer side of the reset shell 8. A sealing plate 9 is fitted on the bottom surface of the reset shell 8. A limiting block 10 is provided on one side of the sealing plate 9. The limiting block 10 is fixed to the lower end of the inner side of the reset shell 8. A torsion spring 11 is provided inside the reset shell 8. A reset rod 12 is provided inside the torsion spring 11. The reset rod 12 is installed and fixed on the sealing plate 9. A plug-in block 13 is threadedly connected to the top surface of the reset rod 12. The top surface of the plug-in block 13 is threadedly connected to the lower outer side of the valve pipe 1. The lower outer side of the torsion spring 11 abuts against the limiting block 10. The upper end of the torsion spring 11 passes through the plug-in block 13 and is fixed to the plug-in block 13. Through the quick disassembly and assembly structure of the reset assembly, it is convenient to replace the reset structure quickly and periodically, thereby ensuring the stable operation of the reset structure and improving its practicality.

[0021] Working Principle: In the use of this utility model, firstly, power is supplied to all electrical equipment. Then, valve pipe 1 is connected to the gas-liquid flow channel system and connected to motor 5 and central control room. When material needs to flow, motor 5 is started to drive the active helical gear 6 to rotate, thereby driving the driven helical gear 7 to rotate, causing ball valve core 2 to rotate. This changes the relative angle between the through hole on ball valve core 2 and the inner diameter of valve pipe 1, thereby controlling the flow rate and achieving gas-liquid control capability. When an emergency occurs causing a power outage, motor 5 loses its rotational power, allowing ball valve core 2 to rotate freely. At this time, torsion spring 11 releases the accumulated rotational force. Force drives the ball valve core 2 to rotate until the torsion spring 11 is fully extended. At this time, the flow channel of the device is closed, blocking the upstream material from entering the downstream and thus protecting the downstream equipment. When the torsion spring 11 needs to be replaced periodically, first rotate the sealing plate 9 to make the reset rod 12 and the plug block 13 rotate synchronously, so that the reset rod 12, the plug block 13 and the torsion spring 11 are removed from the reset shell 8. Then rotate the reset rod 12 and the plug block 13 relative to each other to make the reset rod 12 and the plug block 13 disengage, so that the torsion spring 11 can be pulled out from the plug block 13. Finally, reverse the above steps to reinstall the reset structure to ensure the stable operation of the reset structure.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A redundant protection device for a gas-liquid control valve, comprising a valve tube (1), characterized in that: The valve tube (1) is fixed with flange rings at both ends. The valve tube (1) is provided with a ball valve core (2) inside. The valve tube (1) is provided with a drive assembly on the mounting platform above it. The valve tube (1) is fixed with a reset shell (8) vertically below it. The reset shell (8) is provided with a reset assembly. The upper and lower ends of the ball valve core (2) are respectively connected to the drive assembly and the reset assembly. The reset assembly includes a reset shell (8), which is a hollow tubular structure. The reset shell (8) is vertically fixed to the lower side of the outer side of the reset shell (8), and a sealing plate (9) is fitted on the bottom surface of the reset shell (8). A limiting block (10) is provided on one side of the sealing plate (9). The limiting block (10) is fixed to the lower end of the inner side of the reset shell (8). A torsion spring (11) is provided inside the reset shell (8). The inner side of the torsion spring (11) is provided with a reset rod (12), which is fixedly installed on the sealing plate (9). The top surface of the reset rod (12) is connected to a plug block (13) by a thread. The top surface of the plug block (13) is connected to the lower side of the outer side of the valve pipe (1) by a thread. The outer side of the lower end of the torsion spring (11) abuts against the limiting block (10). The upper end of the torsion spring (11) passes through the plug block (13) and is fixed on the plug block (13).

2. The redundant protection device for a gas-liquid control valve according to claim 1, characterized in that: The drive assembly includes a valve stem (3), which is mounted and fixed above the ball valve core (2). The top end of the valve stem (3) passes through the valve tube (1) and is fixedly connected to a driven helical gear (7).

3. The redundant protection device for a gas-liquid control valve according to claim 2, characterized in that: The driven helical gear (7) is meshed with a driving helical gear (6) on one side, and a motor (5) is fixedly connected to one side of the driving helical gear (6). The motor (5) is mounted and fixed on the transmission box (4), and the transmission box (4) is mounted and fixed on the mounting seat above the valve pipe (1).

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