Safety valve for pressure container
By incorporating an inlet pressure sensor and a remote control handle for an electric cylinder into the safety valve for pressure vessels, the problem of valve stem sticking and jamming due to corrosive gases has been solved, enabling automatic opening and closing of the safety valve and remote pressure relief, thereby improving safety and service life.
Patent Information
- Application Number
- CN202520534499.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-25
AI Technical Summary
During long-term use, existing safety valves for pressure vessels may become stuck and unable to open automatically due to corrosive gases entering the gap between the valve stem and the adjusting screw. This poses a safety hazard and can cause injury to workers.
The system uses an intake pressure sensor to detect the medium pressure and remotely controls the movement of the handle and valve stem via an electric cylinder. Combined with a spring and sealing ring design, it enables automatic opening and closing of the safety valve and remote pressure relief, avoiding close-range manual operation.
It enables automatic opening and closing of safety valves and remote pressure relief, reducing the risk of workers being exposed to corrosive gases, improving production safety, and extending the service life of safety valves.
Smart Images
Figure CN223740122U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of safety valves, in particular to a safety valve for a pressure container. BACKGROUND
[0002] The pressure container refers to a closed equipment for containing gas or liquid and bearing pressure, the safety valve is a special valve in a closed state under the action of an external force, which prevents the pressure of a medium in a pipeline or equipment from exceeding a specified value by discharging the medium to the outside of the system when the pressure of the medium in the pipeline or equipment is higher than the specified value, the safety valve belongs to an automatic valve, and is mainly used in boilers, pressure containers and pipelines to control the pressure to not exceed a specified value, and plays an important protection role on personal safety and equipment operation.
[0003] When the gas in the pressure container is corrosive, in a long-term use process, part of the gas enters a valve body cavity on the upper part of the valve core in the discharging process, and the valve rod and the adjusting screw in a gap fit are stuck and jammed after being corroded, so that the safety valve cannot be automatically opened. To solve the problem, the existing safety valve for the pressure container is usually provided with a handle that can slide up and down in a sliding groove of a valve cap, and the handle is used to drive the valve rod to complete manual pressure relief, but the pressure relief manner makes workers close to a large amount of corrosive gas discharged from the safety valve, and the workers are easily injured.
[0004] In view of the situation, the technical scheme of the application is provided. CONTENT OF THE UTILITY MODEL
[0005] The application aims to provide a safety valve for a pressure container, which does not need to be manually relieved at a close distance, avoids the injury of workers in the pressure relief process, and makes the production process safer.
[0006] The safety valve for the pressure container provided by the application adopts the following technical scheme: a valve body is provided with a valve rod, a valve core and an adjusting screw, one end of the valve rod is in abutment with the valve core, the other end of the valve rod passes through a center hole of the adjusting screw, a handle is further installed on the valve rod at the upper end of the adjusting screw, an electric cylinder is fixed on the valve body, a piston rod is arranged at an output end of the electric cylinder, the piston rod is in abutment with the handle, a valve seat is arranged at one end of the valve body, and an air inlet pressure sensor is installed on the side wall of the valve seat.
[0007] In the long-term use of the safety valve for pressure vessel, due to the corrosive gas medium entering the gap between the valve stem and the adjusting screw center hole in the process of opening and closing of the safety valve, the two are corroded and even stuck, so that the safety valve cannot be opened automatically when the pressure of the medium in the equipment or pipeline exceeds the specified value. At this time, the air inlet pressure sensor installed on the side wall of the valve seat receives the medium pressure value at the air inlet port which has risen and even exceeded the specified value and does not decrease, thus sending an alarm to the worker, and the worker receives the alarm and controls the electric cylinder to work through the control button or remote control, the piston rod moves upward, in turn driving the handle and the valve stem to move upward, as the valve stem moves upward, the medium at the air inlet port acts on the valve core to push the safety valve to open, and the medium is quickly discharged, thereby reducing the system pressure.
[0008] With the reduction of the system pressure, the air inlet pressure sensor detects that the medium pressure value at the air inlet port returns to normal, and the safety valve for pressure vessel cannot be closed automatically due to the sticking of the valve stem and the adjusting screw, at this time the worker needs to cut off the medium entering the safety valve air inlet port of the equipment or pipeline, after the corrosive gas in the safety valve cavity is exhausted, the safety valve is disassembled for cleaning, lubrication, inspection and replacement of damaged parts, and the safety valve is installed back to the use occasion of the equipment or pipeline after ensuring that the safety valve can work normally.
[0009] Optionally, the valve body is further provided with a spring, the two ends of the spring are respectively in abutment with the valve stem and the adjusting screw, the valve stem is in abutment with the valve core on the valve port of the valve seat by the spring force, and the adjusting screw is connected with the inner side of the other end of the valve body through threads.
[0010] By adopting the above technical scheme, the spring force is adjusted to the set pressure of the safety valve by the adjusting screw, and in normal work, the spring force is greater than the force of the medium in the pressure vessel acting on the valve core, so that the safety valve is in a normally closed state. When the pressure in the system reaches or exceeds the set pressure, the force of the medium acting on the valve core overcomes the force of the spring, so that the valve core is opened, the medium is quickly discharged, and the system pressure is reduced. With the reduction of the system pressure, the force of the spring again presses the valve core on the valve seat, so that the valve is closed, and the automatic opening and closing of the safety valve is realized.
[0011] Optionally, a spring seat is arranged between the valve stem and the spring, and a spring top plate is arranged between the adjusting screw and the spring.
[0012] By adopting the above technical scheme, the centering of the valve stem, the spring and the valve core is improved, the valve stem is prevented from being skewed during opening and closing of the safety valve, and the sealing property of the safety valve is improved.
[0013] Optionally, an annular groove is arranged on the upper end of the spring top plate, and a sealing ring is arranged in the annular groove.
[0014] By adopting the technical scheme, the inner circle of the spring top plate is in sliding connection with the valve rod, and the inner circle of the upper end surface of the spring top plate is sealed between the outer circle of the adjusting screw through the sealing ring, so that the channel through which the corrosive gas enters the gap between the valve rod and the adjusting screw is sealed, the corrosion speed of the valve rod and the adjusting screw is slowed down, and the service life of the safety valve is improved.
[0015] Optionally, the other end of the valve body is provided with a valve cap, the side wall of the valve cap is provided with a sliding groove, one end of the handle is connected with the valve rod, and the other end passes through the sliding groove and abuts against the piston rod.
[0016] By adopting the technical scheme, after the staff receives the alarm signal that the valve rod and the adjusting screw are stuck, the electric cylinder is started, the piston rod moves upward and abuts against the handle to move upward, the handle drives the valve rod to move upward, the valve core is opened by the medium acting force, and the medium is rapidly discharged, so that the pressure in the pressure container is reduced.
[0017] Optionally, the end of the piston rod is provided with a groove, and the end of the handle can be inserted into the groove.
[0018] By adopting the technical scheme, the groove cooperates with the end of the handle, and the movement of the piston rod abutting against the handle is more stable.
[0019] Optionally, the valve rod is in sliding connection with the handle, a top sheet is mounted on the valve rod at the upper end of the handle, and a nut is mounted on the valve rod at the upper end of the top sheet.
[0020] By adopting the technical scheme, the valve rod is in sliding connection with the handle, so that when the safety valve normally works, the up-down movement of the valve rod is not affected by the handle; when the valve rod and the adjusting screw are stuck, the top sheet and the nut arranged in sequence on the valve rod can abut against the handle and drive the valve rod to separate from the adjusting screw during the upward movement of the handle, and remote manual pressure relief of the safety valve is completed.
[0021] Optionally, the valve core is provided with a first extension part extending toward the valve seat.
[0022] By adopting the technical scheme, the contact area of the valve core and the valve seat is increased, and the sealing performance of the safety valve is improved.
[0023] Optionally, an outlet gas pressure sensor is arranged on the side wall of the valve body on one side of the valve core.
[0024] By adopting the technical scheme, the medium pressure of the outlet of the safety valve is detected, the medium pressure difference between the inlet and the outlet is compared by combining the inlet gas pressure sensor, whether the safety valve is normal and the opening and closing sensitivity are determined, and whether the corrosive gas is emptied before the staff overhauls the valve rod and the adjusting screw is determined.
[0025] Optionally, a locking nut is arranged on the upper end of the adjusting screw to lock the adjusting screw to the end surface of the valve body.
[0026] By adopting the technical scheme, the adjusting screw and the spring are locked when the adjusting screw adjusts the valve opening pressure to the set pressure, so that the working state of the safety valve is stable.
[0027] To sum up, the present application has at least one of the following beneficial technical effects:
[0028] 1. By using the pressure sensor and the electric cylinder, the handle is remotely controlled, which reduces the risk of workers contacting corrosive gas and improves the safety of production.
[0029] 2. The upper end of the spring top plate is provided with a ring groove matched with a sealing ring, so that the channel through which the corrosive gas enters the gap between the valve rod and the adjusting screw is sealed, the corrosion resistance of the safety valve is improved, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS
[0030] Figure 1 is a sectional view of the overall structure of a safety valve for a pressure vessel;
[0031] Figure 2 is Figure 1 a local enlarged view of a.
[0032] BRIEF DESCRIPTION OF DRAWINGS: 1. valve body; 11. outlet pressure sensor; 2. valve rod; 21. top sheet; 22. nut; 3. valve core; 31. first extension; 4. adjusting screw; 41. locking nut; 5. handle; 6. electric cylinder; 61. piston rod; 611. groove; 7. valve seat; 71. inlet pressure sensor; 8. spring; 81. spring seat; 82. spring top plate; 83. sealing ring; 9. valve cap; 91. sliding groove. DETAILED DESCRIPTION
[0033] The following will be described in detail in combination with the accompanying Figures 1-2 The present application is further described in detail.
[0034] The present application discloses a safety valve for a pressure vessel.
[0035] In combination with Figure 1 , Figure 2 shown, a safety valve for a pressure vessel, comprising a valve body 1, one end of the valve body 1 is provided with a valve seat 7, the valve body 1 is provided with a valve rod 2, a valve core 3, a spring 8 and an adjusting screw 4 inside, one end of the valve rod 2 abuts against the valve core 3 and the other end passes through the center hole of the adjusting screw 4, the valve rod 2 on the upper end of the adjusting screw 4 is further provided with a handle 5, the valve body 1 is fixed with an electric cylinder 6, the output end of the electric cylinder 6 is provided with a piston rod 61, the piston rod 61 abuts against the handle 5, and the side wall of the valve seat 7 is provided with an inlet pressure sensor 71.
[0036] During the long-term use of safety valves for pressure vessels, corrosive gaseous media may enter the gap between the valve stem 2 and the center hole of the adjusting screw 4 during the opening and closing of the safety valve, causing both to be corroded or even stuck together. As a result, when the pressure of the medium in the equipment or pipeline rises above the specified value, the safety valve cannot open automatically and discharge the medium to the outside of the system.
[0037] To address this issue, in one embodiment of this application, the valve stem 2 is slidably connected to the handle 5. A top plate 21 is mounted on the valve stem 2 at the upper end of the handle 5, and a nut 22 is mounted on the valve stem 2 at the upper end of the top plate 21. Because the valve stem 2 is slidably connected to the handle 5, the up-and-down movement of the valve stem 2 is not affected by the handle 5 when the safety valve is working normally. When the valve stem 2 is stuck with the adjusting screw 4, such as... Figure 2 As shown, the intake pressure sensor 71 receives a reading indicating that the medium pressure at the intake port exceeds the limit, and thus issues an alarm to the operator. Upon receiving the alarm, the operator controls the electric cylinder 6 via a control button or remote control. The piston rod 61 moves upward, causing the handle 5 to move upward as well. The top plate 21 and nut 22, sequentially mounted on the valve stem 2, abut against the handle 5 during its upward movement, causing the valve stem 2 to disengage from the adjusting screw 4. As the valve stem 2 moves upward, the medium at the intake port acts on the valve core 3, pushing the safety valve open and rapidly discharging the medium, thereby reducing the system pressure.
[0038] Specifically, valve cap 9 is fixedly connected to the valve body 1 at the opposite end to valve seat 7. The side wall of valve cap 9 is provided with a groove 91 for the handle 5 to slide up and down. During installation, one end of handle 5 is slidably connected to valve stem 2, and the other end passes through the groove 91 and abuts against piston rod 61. For example... Figure 1 As shown, the piston rod 61 has a groove 611 at its end. During the upward movement of the piston rod 61, the end of the handle 5 can be inserted into the groove 611 and abut against the piston rod 61, thereby enabling the electric cylinder 6 to remotely push the handle 5 to open the safety valve and complete the pressure relief.
[0039] It should be noted that the above safety valve structural design is only for situations where the safety valve cannot be opened normally due to corrosion. In order to reduce the damage of corrosive gases to the safety valve and extend its service life, this application also adopts the following structural settings.
[0040] A spring seat 81 is provided on the contact surface between the spring 8 and the valve stem 2, and a spring top plate 82 is provided on the contact surface between the spring 8 and the adjusting screw 4. This makes it less likely for the slender valve stem 2 to deviate or deform when it moves up and down in the valve cavity. It also improves the centering of the valve stem 2, spring 8, and valve core 3, as well as the sealing performance of the safety valve, and overall improves the service life of the safety valve.
[0041] In order to seal the corrosive gas into the gap between the valve stem 2 and the adjusting screw 4, a ring groove is arranged on the upper end of the spring top plate 82, a sealing ring 83 is arranged in the ring groove, the inner circle of the spring top plate 82 is connected with the valve stem 2 in sliding fit, the corrosive gas is prevented from entering between the spring top plate 82 and the valve stem 2, the inner circle of the upper end surface of the spring top plate 82 is sealed with the outer circle of the adjusting screw 4 through the sealing ring 83, the corrosive gas is prevented from entering between the spring top plate 82 and the adjusting screw 4, double blocking slows down the corrosion speed of the valve stem 2 and the adjusting screw 4, and the service life of the safety valve is improved.
[0042] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, so: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.
Claims
1. A safety valve for a pressure vessel, characterized by: The utility model provides a valve, including valve body (1), be equipped with valve stem (2), valve core (3) and adjusting screw (4) in valve body (1), valve stem (2) one end with valve core (3) abutment the other end passes through the central hole of adjusting screw (4), valve stem (2) on the upper end of adjusting screw (4) still is installed handle (5), valve body (1) is fixed with electric cylinder (6), electric cylinder (6) output is equipped with piston rod (61), piston rod (61) with handle (5) abutment, one end of valve body (1) is equipped with valve seat (7), the lateral wall of valve seat (7) is installed air inlet pressure sensor (71).
2. A safety valve for a pressure vessel according to claim 1, characterised in that: The utility model provides a valve, including valve body (1), be equipped with valve stem (2), valve core (3) and adjusting screw (4) in valve body (1), valve stem (2) one end with valve core (3) abutment the other end passes through the central hole of adjusting screw (4), valve stem (2) on the upper end of adjusting screw (4) still is installed handle (5), valve body (1) is fixed with electric cylinder (6), electric cylinder (6) output is equipped with piston rod (61), piston rod (61) with handle (5) abutment, one end of valve body (1) is equipped with valve seat (7), the lateral wall of valve seat (7) is installed air inlet pressure sensor (71).
3. A safety valve for a pressure vessel according to claim 2, characterised in that: The utility model provides a valve, including valve body (1), be equipped with valve stem (2), valve core (3) and adjusting screw (4) in valve body (1), valve stem (2) one end with valve core (3) abutment the other end passes through the central hole of adjusting screw (4), valve stem (2) on the upper end of adjusting screw (4) still is installed handle (5), valve body (1) is fixed with electric cylinder (6), electric cylinder (6) output is equipped with piston rod (61), piston rod (61) with handle (5) abutment, one end of valve body (1) is equipped with valve seat (7), the lateral wall of valve seat (7) is installed air inlet pressure sensor (71).
4. A safety valve for a pressure vessel according to claim 3, characterised in that: The utility model provides a valve, including valve body (1), be equipped with valve stem (2), valve core (3) and adjusting screw (4) in valve body (1), valve stem (2) one end with valve core (3) abutment the other end passes through the central hole of adjusting screw (4), valve stem (2) on the upper end of adjusting screw (4) still is installed handle (5), valve body (1) is fixed with electric cylinder (6), electric cylinder (6) output is equipped with piston rod (61), piston rod (61) with handle (5) abutment, one end of valve body (1) is equipped with valve seat (7), the lateral wall of valve seat (7) is installed air inlet pressure sensor (71).
5. A safety valve for a pressure vessel according to claim 1, wherein: The utility model provides a valve, including valve body (1), be equipped with valve stem (2), valve core (3) and adjusting screw (4) in valve body (1), valve stem (2) one end with valve core (3) abutment the other end passes through the central hole of adjusting screw (4), valve stem (2) on the upper end of adjusting screw (4) still is installed handle (5), valve body (1) is fixed with electric cylinder (6), electric cylinder (6) output is equipped with piston rod (61), piston rod (61) with handle (5) abutment, one end of valve body (1) is equipped with valve seat (7), the lateral wall of valve seat (7) is installed air inlet pressure sensor (71).
6. A safety valve for a pressure vessel according to claim 5, characterised in that: The utility model provides a valve, including valve body (1), be equipped with valve stem (2), valve core (3) and adjusting screw (4) in valve body (1), valve stem (2) one end with valve core (3) abutment the other end passes through the central hole of adjusting screw (4), valve stem (2) on the upper end of adjusting screw (4) still is installed handle (5), valve body (1) is fixed with electric cylinder (6), electric cylinder (6) output is equipped with piston rod (61), piston rod (61) with handle (5) abutment, one end of valve body (1) is equipped with valve seat (7), the lateral wall of valve seat (7) is installed air inlet pressure sensor (71).
7. A safety valve for a pressure vessel according to claim 1, wherein: 8. A safety valve for a pressure vessel according to claim 1, characterized in that: 9. A safety valve for a pressure vessel according to claim 1, characterized in that: 10. A safety valve for a pressure vessel according to claim 2, characterised in that: