Interlock monitoring of bottom valve for self-closing safety valve

Abstract

The utility model relates to valve technical field especially relates to self -locking safety valve interlock monitoring bottom valve, self -locking safety valve interlock monitoring bottom valve, including valve body, valve handle, valve plate, valve rod, valve rod shield and valve cover, be equipped with concave and convex groove on the valve rod, be equipped with male slot in concave and convex groove, the concave and convex groove in the corresponding position of valve cover is equipped with recess, the valve body is equipped with valve seat and upper seal seat respectively, spring and information sensor are installed in recess, when the valve opening reaches the full open position, the male slot of valve rod and recess of valve cover are locked through spring thrust engagement, information sensor generates locking signal and is transmitted to integrated controller through signal transmission circuit, integrated controller and central control system communication connection. The utility model eliminates the safety hidden danger such as overpressure explosion, equipment damage caused by root valve error closing from the root, and through the real -time communication of information sensor and central control, realizes the digital monitoring of valve full open state.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a self-locking safety valve with interlocking monitoring of the bottom valve. Background Technology

[0002] In pressure vessel equipment and pipeline systems in China's chemical, petroleum, and pharmaceutical industries, safety valves are core safety devices for preventing pressure over-limits, and their reliability directly affects production safety. Currently, root valves are permitted on safety vessels and pipelines in China's chemical industry, but they must meet specific conditions. The root valve must be fully open and locked with a lead seal to prevent closure. Traditional lead seals and locks rely heavily on personnel's safety awareness, making it easy for personnel to close the root valve without authorization. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a self-locking safety valve with interlocking monitoring of the bottom valve, which has the advantages of mechanical self-locking to prevent misoperation and solves the problem of easy damage to traditional lead seals.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] The self-locking safety valve interlocks and monitors the bottom valve, including a valve body, valve handle, valve plate, valve stem, valve stem cover, and valve cover. The valve stem has a groove with a raised groove, and the corresponding groove in the valve cover has a recess. The valve body has a valve seat and an upper sealing seat, and a spring and an information sensor are installed in the recess. When the valve is fully open, the raised groove of the valve stem and the recess of the valve cover are engaged and locked by the spring force. The information sensor generates a locking signal and transmits it to the integrated controller through a signal transmission line. The integrated controller is connected to the central control system and is used to display the valve status on the central control console.

[0006] Preferably, the convex groove of the valve stem and the groove of the valve cover are made of wear-resistant non-ferrous metal material to reduce wear and heat source risks.

[0007] Preferably, it also includes an interlocking alarm device, suitable for flammable and explosive locations.

[0008] Preferably, the interlocking alarm device includes a warning light and adopts a dual alarm mode of visual light and sound, suitable for indoor, outdoor and concealed places.

[0009] Preferably, the valve stem is made of a high-temperature and corrosion-resistant material, suitable for high-temperature or corrosive pressure vessels and pipelines.

[0010] Preferably, the valve body is manufactured using a forging process and is suitable for medium and high pressure vessels and pipelines.

[0011] By employing the above technical solution, this utility model provides a self-locking safety valve with interlocking monitoring of the bottom valve, which has at least the following beneficial effects:

[0012] 1. This self-locking safety valve interlocks with the bottom valve. When the valve is fully open, the valve stem protrusion and the valve sleeve groove automatically engage and lock under the spring force, forming a mechanical self-locking structure. Combined with the locking signal generated by the information sensor and transmitted to the central control system, it can prevent personnel from closing the valve without authorization. This design transforms "human supervision" into "physical forced locking," ensuring that the safety valve is always in an effective operational state during the normal operation of the pressure vessel. It eliminates safety hazards such as overpressure explosions and equipment damage caused by accidental closure of the root valve from the root. At the same time, through real-time communication between the information sensor and the central control system, it realizes digital monitoring of the fully open valve status, solving the problems of "unknown status and no record of operation" in traditional lead seal management.

[0013] 2. This self-locking safety valve interlocks with the bottom valve. When an unauthorized valve closing operation causes the valve stem protrusion to disengage from the valve sleeve groove, the information sensor immediately triggers the on-site audible and visual alarm device due to signal interruption. The alarm is alerted to surrounding personnel through both flashing lights and audible sounds, and the alarm signal is transmitted to the central control system in real time, causing the control panel to display the abnormal valve closing status. This function realizes the interlocking control of "illegal operation triggers an alarm, and status change is recorded." Compared with the traditional manual inspection mode, it can shorten the time for anomaly detection from "hours" to "seconds," saving valuable time for emergency response. At the same time, the process design of "on-site alarm cancellation requires central control confirmation" strengthens the management of operating permissions and improves the automation and precision of pressure vessel safety monitoring. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure label:

[0017] 1. Valve body; 2. Valve seat; 3. Valve plate; 4. Valve cover; 5. Upper sealing seat; 6. Valve stem; 7. Packing sleeve; 8. Packing pressure plate; 9. Information sensor; 10. Valve stem cover; 11. Groove; 12. Warning light; 13. Spring; 14. Integrated controller. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a self-locking safety valve interlocking monitoring bottom valve.

[0020] Example 1:

[0021] Traditional valves rely on manual locking and lead seals to maintain their fully open state. However, lead seals are easily damaged (e.g., removed and then closed), susceptible to vibration or corrosion, and require no authorization or record-keeping after operation. This can cause safety valves to fail due to root valve closure during abnormal pressure conditions. To address these issues, a new method is developed that combines... Figure 1 As shown, the self-locking safety valve interlock monitoring bottom valve provided by this utility model includes a valve body 1, a valve handle, a valve plate 3, a valve stem 6, a valve stem cover 10, and a valve cover 4. The valve stem 6 has a groove 11 with a convex slot. Corresponding grooves 11 in the valve cover 4 have recesses. The valve body 1 contains a valve seat 2 and an upper sealing seat 5. A spring 13 and an information sensor 9 are installed in the recesses. The spring 13 conforms to the industry standard HG / T2479-2020, ensuring elasticity and service life. When the valve is fully open, the convex slot of the valve stem 6 and the recess of the valve cover 4 are locked by the thrust of the spring 13. The information sensor 9 generates a locking signal and transmits it to the integrated controller 14 via a signal transmission line. The integrated controller 14 is connected to the central control system to display the valve status (fully open / closed). At the central control console, when the valve needs to be closed, an unlocking command must be sent to the integrated controller 14 through the central control system. After receiving the signal, the information sensor 9 controls the spring 13 to retract, releasing the lock between the valve stem 6 protrusion and the valve cover 4 groove. If the operation is not authorized by the central control system, the information sensor 9 will trigger the on-site audible and visual alarm device (including warning light 12) due to signal interruption and send an alarm signal to the central control system. The signal transmission line is integrated and laid through the signal line cable tray to achieve stable communication with the central control system, ensuring that the valve cannot be closed without authorization when it is fully open. This physically prevents personnel from closing the root valve of the safety valve without authorization. Combined with the real-time communication between the information sensor 9 and the central control system, the valve's fully open / closed status can be accurately fed back to the console and the operation record can be left, solving the problems of unknown status and lack of traceability in traditional lead seal management.

[0022] A packing sleeve 7 is provided between the valve stem 6 and the valve cover 4, which is in direct contact with the packing and is used to compress the packing to achieve a seal on the valve stem 6 and prevent media leakage.

[0023] A packing pressure plate 8 is provided above the packing sleeve 7. Pressure is applied through bolts and other connecting parts, and the force is transmitted to the packing sleeve 7 to further compact the packing.

[0024] Specifically, the valve stem 6 protrusion and the valve cover 4 groove are made of wear-resistant non-ferrous metal material to reduce wear and heat source risks.

[0025] Furthermore, the interlocking alarm device is explosion-proof and suitable for flammable and explosive environments.

[0026] As can be seen from the embodiments, the device can effectively prevent employees from disabling safety facilities without authorization through valve self-locking and interlocking control, reduce the hidden dangers of equipment damage, overpressure explosion, and environmental pollution caused by overpressure of pressure equipment and facilities, and solve the problem of disconnection between the safety valve interlock and the DCS control system of the current device, ensuring the effective use of safety facilities.

[0027] Example 2:

[0028] Combination Figure 1 As shown, based on Embodiment 1, the warning light 12 adopts a dual alarm mode of visual light and sound, which is suitable for indoor, outdoor and hidden places. The time for abnormality detection is shortened from hours. The signal transmission line effectively resists electromagnetic interference and environmental erosion through the integrated signal line cable tray, and the transmission reliability is high.

[0029] Specifically, the valve stem 6 is made of high-temperature and corrosion-resistant materials, which are suitable for high-temperature or corrosive pressure vessels and pipelines, ensuring long-term stable operation in harsh environments such as high temperature, high pressure and corrosion, with low wear rate and excellent fatigue resistance.

[0030] Furthermore, the valve body 1 is manufactured using a forging process and is suitable for medium and high pressure vessels and pipelines. As can be seen from the above embodiments: when the operator rotates the valve handle to drive the valve stem 6 to the fully open position, the convex groove of the valve stem 6 and the groove of the valve cover 4 engage and lock under the thrust of the spring 13. The information sensor 9 in the groove generates a "fully open locked" signal, which is transmitted to the integrated controller 14 through the signal transmission line and cable tray. The controller then sends the signal to the central control system, causing the control panel to display a green "fully open" state and record the operation information. When the valve is in the self-locking fully open state, the valve cannot be closed by the valve handle without authorization from the central control system. Forced operation will cause the convex groove of the valve stem 6 to disengage from the groove of the valve cover 4, triggering the information sensor 9 to activate the warning light 12 and send a red alarm signal to the central control system. When it is necessary to close the valve normally, the operator first completes the authorization authentication in the central control system. The system sends an unlock command to the integrated controller 14, driving the information sensor 9 to control the spring 13 to retract and unlock. At this time, the valve handle can be rotated to close the valve. After the convex groove of the valve stem 6 disengages from the groove, the information sensor 9 triggers the alarm again and sends a "close" signal to the central control system, causing the control panel to display a red "close" state and record relevant information.

[0031] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self locking safety valve interlock monitoring bottom valve, comprising a valve body (1), a valve handle, a valve plate (3), a valve stem (6), a valve stem guard (10) and a valve cover (4), characterized in that: The valve stem (6) is provided with a groove (11), and a convex groove is provided in the groove (11). The corresponding groove (11) in the valve cover (4) is provided with a groove. The valve body (1) is provided with a valve seat (2) and an upper sealing seat (5). A spring (13) and an information sensor (9) are installed in the groove. When the valve is fully open, the convex groove of the valve stem (6) and the groove of the valve cover (4) are engaged and locked by the thrust of the spring (13). The information sensor (9) generates a locking signal and transmits it to the integrated controller (14) through the signal transmission line. The integrated controller (14) is connected to the central control system and is used to display the valve status on the central control console.

2. The self-locking safety valve interlock monitoring block valve of claim 1, wherein: The convex groove of the valve stem (6) and the groove of the valve cover (4) are made of wear-resistant non-ferrous metal material to reduce wear and heat source risk.

3. The self-locking safety valve interlock monitoring block valve of claim 1, wherein: It also includes interlocking alarm devices, suitable for flammable and explosive locations.

4. The self-locking safety valve interlock monitoring block valve of claim 1, wherein: The interlocking alarm device includes a warning light (12), which adopts a dual alarm mode of visual light and sound, and is suitable for indoor, outdoor and hidden places.

5. The self-latching safety valve interlock monitor pit valve of claim 1, wherein: The valve stem (6) is made of high temperature and corrosion resistant material, and is suitable for high temperature or corrosive pressure vessels and pipelines.

6. The self-locking safety valve interlock monitoring block valve of claim 1, wherein: The valve body (1) is manufactured by forging and is suitable for medium and high pressure vessels and pipelines.

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