A safety device for pressure vessel

Abstract

The present invention relates to the technical field of pressure vessels, and specifically to a safety device for pressure vessels, comprising a pressure vessel body, wherein a support seat is fixedly mounted on the upper end of the pressure vessel body, and a gas cylinder is fixedly connected to the inner side of the support seat; the beneficial effects are as follows: with the support seat as a support, a gas pipe is mounted on the upper end of the pressure vessel body for transmitting the gas inside the pressure vessel body, a pressure release stabilizing mechanism is utilized to release the high-pressure gas, and the gas cylinder is cooperated to realize temporary storage of the released gas, so as to avoid gas leakage into the air to cause pollution, and ensure the stability of the air pressure in the inner cavity of the pressure vessel body; once the pressure of the released gas is too high, the trigger actuator is urgently triggered, and the execution opening and closing mechanism is linked under the action of the electrical connection to realize the opening of the output port of the gas cylinder, and the temporarily stored gas is released through the operation of the execution opening and closing mechanism, so as to avoid the risk of explosion caused by excessive air pressure inside the gas cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of pressure vessels, in particular to a safety device for pressure vessels. Background Art

[0002] A pressure vessel is a closed container that can withstand pressure. It has a wide range of uses and plays an important role in many sectors such as industry, civil industry, military industry, and many fields of scientific research. It is most commonly used in the chemical industry and petrochemical industry. Pressure vessels used in the petrochemical industry alone account for about 50% of the total number of pressure vessels. In the chemical and petrochemical fields, pressure vessels are mainly used in process processes such as heat transfer, mass transfer, reaction, and storage and transportation of pressurized gases or liquefied gases. When storing materials in pressure vessels, safety devices are required to protect them.

[0003] In the prior art, there is an explosion-proof pressure vessel with a publication number of CN214467815U, which includes a container body, a pressure relief pipe connected to the container body, one end of the pressure relief pipe connected to the inside of the container body, a switch device for controlling whether the pressure relief pipe is turned on or off connected to the pressure relief pipe, a first pressure detector connected to the container body, a sensing end of the first pressure detector located in the container body, used to detect the air pressure in the container body, a first pressure gauge for displaying the measured pressure connected to the first pressure detector, and the first pressure gauge located outside the container body. The above application has the effect of improving the explosion-proof performance.

[0004] However, in actual use, when an emergency occurs, the gas in the inner cavity of the pressure vessel can be actively transmitted and stored to achieve the effect of stabilizing the air pressure in the inner cavity. However, once a major emergency accident occurs, the gas pressure input into the pressure vessel is too high, causing the storage cavity to be overloaded. Personnel still need to release it manually, and the gas source cannot be cut off quickly, which can easily lead to the expansion of the accident and cause greater economic losses.

[0005] Therefore, the present invention proposes a safety device for a pressure vessel to solve the problem that the prior art is difficult to maintain a stable air pressure inside the cavity. The air pressure inside the container can be stabilized to enhance the stability and explosion-proof performance of the pressure vessel. Summary of the invention

[0006] The object of the present invention is to provide a safety device for a pressure vessel to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a safety device for a pressure vessel, comprising a pressure vessel body, the upper end of the pressure vessel body is fixedly installed with a support seat, the inner side of the support seat is fixedly connected with a gas cylinder, the inner surface of the gas cylinder is fixedly connected with a gas supply pipe, the outer surface of the lower end of the gas supply pipe is fixedly installed with a one-way valve, the outer surface of the one-way valve is sealed with the inner wall of the upper end of the pressure vessel body, a release and pressure stabilizing mechanism is movably installed inside the gas supply pipe, a trigger actuator is arranged directly above the release and pressure stabilizing mechanism, the upper end of the gas cylinder is through-connected with a vent valve pipe, an actuator opening and closing mechanism is arranged between the vent valve pipe and the gas cylinder, the output end of the vent valve pipe is sealed with a return pipe, and the other end of the return pipe extends to the interior of the pressure vessel body; a solenoid valve is arranged on the inner side wall of the return pipe.

[0008] Preferably, the release and pressure-stabilizing mechanism includes a fixed circular plate and a movable circular plate, the outer surface of the fixed circular plate is fixedly connected to the inner wall of the lower end of the gas pipe, a flow pipe is connected through the inner wall of the fixed circular plate, a blocking column is fixedly installed on the upper surface of the fixed circular plate, a receiving groove is opened on the inner wall of the upper end of the fixed circular plate, a reset spring is fixedly installed on the bottom surface of the inner cavity of the receiving groove, and the other end of the reset spring is fixedly connected to the lower surface of the movable circular plate.

[0009] Preferably, a lifting slot is provided on the inner wall of the gas pipe, and a lifting slider is slidably connected to the inner wall of the lifting slot. Two groups of lifting sliders are provided, and the two groups of lifting sliders are fixedly mounted on the outer surfaces of both sides of the movable circular plate. The outer surface of the movable circular plate is movably connected to the inner wall of the gas pipe.

[0010] Preferably, a second blocking column is fixedly installed on the lower surface of the movable circular plate, and the outer surface of the second blocking column is movably connected to the inner wall of the flow tube one. A second flow tube is connected through the inner wall of the movable circular plate, and the inner surface of the second flow tube is movably connected to the outer surface of the first blocking column.

[0011] Preferably, a connecting rod is fixedly mounted on the upper end of the movable circular plate, and a conical plate is fixedly mounted on the upper end of the connecting rod, and the conical plate as a whole presents a conical block structure that is wider at the bottom and narrower at the top.

[0012] Preferably, the trigger actuator includes a fixed ring plate, which is fixedly installed on the upper inner wall of the gas pipe, and the inner ring surface of the fixed ring plate is fixedly connected with a conical receiving groove plate, and a reserved groove is opened at the upper end of the conical receiving groove plate, and an annular support is fixedly installed on the upper surface of the fixed ring plate, and the upper end of the annular support is fixedly connected with a center ring, and a control switch is fixedly installed on the inner ring surface of the center ring.

[0013] Preferably, the cut section of the gas cylinder is in a "concave" shape as a whole, the inner cavity of the gas cylinder is provided with a gas storage cavity, and the inner cavity bottom surface of the gas storage cavity is provided with an air inlet.

[0014] Preferably, the execution opening and closing mechanism includes a sleeve ring plate, an inner mounting ring plate and a linkage assembly, the sleeve ring plate is arranged on the top surface of the inner cavity of the air storage cavity, and the outer ring surface of the sleeve ring plate is fixedly connected to the inner wall of the lower end of the ventilation valve tube, the outer surface of the inner mounting ring plate is fixedly connected to the inner ring surface of the sleeve ring plate, the inner surface of the inner mounting ring plate is provided with an annular groove, and a linkage assembly is movably installed on the inner side of the annular groove.

[0015] Preferably, the linkage assembly includes a support block and a drive motor, the support block is fixedly mounted on the inner surface of the inner mounting ring plate, the drive motor is fixedly mounted on the upper end of the support block, an active rotating gear is fixedly connected to the output shaft of the drive motor, an outer surface of the active rotating gear is meshed and rotatably engaged with a gear ring, an outer ring surface of the gear ring is fixedly connected with a swivel, an outer surface of the swivel is rotatably connected to the inner wall of the annular groove, an inner surface of the gear ring is meshed and rotatably engaged with a driven gear, and five groups of driven gears are arranged; the drive motor is electrically connected to the control switch.

[0016] Preferably, a driven opening and closing assembly is provided on one side of the active rotating gear and the driven gear, and the driven opening and closing assembly includes a connecting gear rod and a closed triangular plate, the outer surface of the connecting gear rod is slidably connected to the lower inner wall of the inner mounting ring plate, and the connecting gear rod is provided with multiple groups, and the lower surfaces of the multiple groups of connecting gear rods are respectively fixedly connected to the upper surface of the closed triangular plate, and the outer surfaces of the multiple groups of connecting gear rods mesh and rotate with the outer surfaces of the active rotating gear and the driven gear.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The safety device for a pressure vessel proposed in the present invention uses a support seat as a support, and a gas pipe is installed on the upper end of the pressure vessel tank body for transmitting the gas inside the pressure vessel tank body. A release and pressure stabilizing mechanism is used to release the high-pressure gas, and a gas storage cylinder is used to temporarily store the released gas, so as to avoid the gas leakage into the air to cause pollution, and ensure the stability of the air pressure in the inner cavity of the pressure vessel tank body; once the pressure of the released gas is too high, the triggering actuator is urgently triggered, and the execution opening and closing mechanism is linked under the action of the electrical connection to realize the opening of the output port of the gas storage cylinder. The temporarily stored gas is released by the operation of the execution opening and closing mechanism, so as to avoid the risk of explosion caused by excessive air pressure in the gas storage cylinder, further effectively improve the stability of the pressure vessel, and ensure the safety of gas transportation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0021] Figure 3 It is a schematic cross-sectional view of the connection between the air storage cylinder and the vent valve pipe of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the connection section between the gas delivery pipe and the pressure release and stabilizing mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of a partial cross-section structure of a release and pressure stabilizing mechanism of the present invention;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the trigger actuator of the present invention;

[0025] Figure 7 It is a half-section structural schematic diagram of the trigger actuator of the present invention;

[0026] Figure 8 It is a half-section structural schematic diagram of the opening and closing mechanism of the present invention;

[0027] Fig. 9 For the present invention Figure 8 A schematic diagram of the enlarged structure at point A;

[0028] Fig.10 For the present invention Figure 8 A schematic diagram of the enlarged structure at B;

[0029] Fig.11 It is a schematic diagram of the structure of the multiple sets of closed triangle plates of the present invention in a top-down state when they are opened;

[0030] Fig.12 It is a schematic diagram of the structure of the multiple sets of closed triangle plates of the present invention in a top view when they are closed and opened.

[0031] In the figure: 1, pressure vessel body; 2, support seat; 3, gas pipe; 31, one-way valve; 4, gas cylinder; 40, gas storage chamber; 41, air inlet; 5, vent pipe; 6, return pipe; 7, release pressure stabilizing mechanism; 71, fixed circular plate; 711, flow pipe 1; 712, blocking column 1; 72, movable circular plate; 720, lifting slider; 30, lifting slide; 721, blocking column 2; 722, flow pipe 2; 723, connecting rod; 724, conical plate; 730, receiving groove; 73, Return spring; 8. Trigger actuator; 81. Fixed ring plate; 82. Conical receiving groove plate; 821. Reserved groove; 83. Annular support frame; 831. Center ring; 84. Control switch; 9. Execute opening and closing mechanism; 91. Socket ring plate; 92. Inner mounting ring plate; 920. Annular groove; 93. Linkage assembly; 931. Support block; 932. Drive motor; 933. Active rotating gear; 934. Gear ring; 9341. Swivel; 941. Connecting gear rod; 942. Closed triangle plate. DETAILED DESCRIPTION

[0032] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] See also Figure 1-Figure 12 The present invention provides a technical solution: a safety device for a pressure vessel, comprising a pressure vessel body 1, a support seat 2 is fixedly installed on the upper end of the pressure vessel body 1, a gas storage cylinder 4 is fixedly connected to the inner side of the support seat 2, a gas delivery pipe 3 is fixedly connected to the inner surface of the gas storage cylinder 4, a one-way valve 31 is fixedly installed on the outer surface of the lower end of the gas delivery pipe 3, the outer surface of the one-way valve 31 is sealed and connected to the inner wall of the upper end of the pressure vessel body 1, and a release and stabilizing mechanism 7 is movably installed inside the gas delivery pipe 3, A trigger actuator 8 is arranged directly above the release and pressure-stabilizing mechanism 7, a vent valve pipe 5 is connected to the upper end of the air cylinder 4, an actuator opening and closing mechanism 9 is arranged between the vent valve pipe 5 and the air cylinder 4, an output end of the vent valve pipe 5 is sealed and connected to a return air pipe 6, and the other end of the return air pipe 6 extends to the interior of the pressure vessel tank body 1; the cut section of the air cylinder 4 is an overall "concave"-shaped structure, the inner cavity of the air cylinder 4 is provided with an air storage cavity 40, and an air inlet 41 is opened on the bottom surface of the inner cavity of the air storage cavity 40.

[0035] With the support seat 2 as support, a gas pipe 3 is installed on the upper end of the pressure vessel tank body 1 for transmitting the gas inside the pressure vessel tank body 1. The high-pressure gas is released by utilizing the pressure-releasing and stabilizing mechanism 7, and the released gas is temporarily stored in cooperation with the gas storage cylinder 4 to avoid gas leakage into the air to cause pollution and ensure the stability of the air pressure in the inner cavity of the pressure vessel tank body 1. Once the pressure of the released gas is too high, the triggering actuator 8 is urgently triggered, and the execution opening and closing mechanism 9 is linked under the action of the electrical connection to realize the opening of the output port of the gas storage cylinder 4. The temporarily stored gas is released by the operation of the execution opening and closing mechanism 9 to avoid the risk of explosion caused by excessive air pressure inside the gas storage cylinder 4, further effectively improving the stability of the pressure vessel and ensuring the safety of gas transportation and storage.

[0036] Embodiment 2

[0037] On the basis of the first embodiment, in order to achieve the stabilization of the gas pressure in the inner cavity of the pressure vessel tank body 1: the release and stabilizing mechanism 7 includes a fixed circular plate 71 and a movable circular plate 72, the outer surface of the fixed circular plate 71 is fixedly connected to the inner wall of the lower end of the gas pipe 3, a flow pipe 711 is connected through the inner wall of the fixed circular plate 71, a blocking column 712 is fixedly installed on the upper surface of the fixed circular plate 71, a receiving groove 730 is opened on the inner wall of the upper end of the fixed circular plate 71, and a reset spring 73 is fixedly installed on the bottom surface of the inner cavity of the receiving groove 730, and the other end of the reset spring 73 is fixedly connected to the lower surface of the movable circular plate 72; the gas pipe 3 A lifting slot 30 is provided on the inner wall of the lifting slot 30, and a lifting slider 720 is slidably connected to the inner wall of the lifting slot 30. Two groups of lifting sliders 720 are provided, and the two groups of lifting sliders 720 are fixedly installed on the outer surfaces of both sides of the movable circular plate 72, and the outer surface of the movable circular plate 72 is movably connected to the inner wall of the gas pipeline 3; a blocking column 2 721 is fixedly installed on the lower surface of the movable circular plate 72, and the outer surface of the blocking column 2 721 is movably connected to the inner wall of the flow pipe 1 711, and a flow pipe 2 722 is connected through the inner wall of the movable circular plate 72, and the inner surface of the flow pipe 2 722 is movably connected to the outer surface of the blocking column 1 712.

[0038] When it is necessary to release the gas pressure inside the pressure vessel tank body 1, the one-way valve 31 is controlled to open. At this time, the input port at the lower end of the gas transmission pipe 3 is opened, and a part of the circulating gas is transmitted through the circulation pipe 1 711 connected to the inner wall of the fixed circular plate 71. At this time, the gas pressure continues to push upward, and the blocking column 2 721 and the circulation pipe 2 722 set on the movable circular plate 72 are changed from a state of interlacing with the circulation pipe 1 711 and the blocking column 1 712 to a separated state. At this time, the gas at the lower part of the fixed circular plate 71 continues to flow upward through the circulation pipe 1 711 and the blocking column 2 721, and is continuously transmitted to the inner cavity of the gas storage cylinder 4. The opening of the receiving groove 730 is to reset the compressed The spring 73 is used to accommodate the movable circular plate 72, and when the movable circular plate 72 is separated from the fixed circular plate 71, the return spring 73 is elastically stretched by the pulling force of the movable circular plate 72. Once the one-way valve 31 is closed and the gas is stopped from being transported into the gas pipe 3, the movable circular plate 72 is restored under the reverse elastic force of the return spring 73, so that the staggered flow pipe 1 711 and the blocking column 2 721 on the fixed circular plate 71 and the movable circular plate 72 are blocked to avoid the recirculation of gas, further ensure the stability of the gas pressure in the inner cavity of the pressure vessel tank body 1, improve the safety and reliability of the pressure vessel tank body 1 when storing gas, so as to ensure the safe operation of the pressure vessel tank body 1 and prevent potential accidents.

[0039] Embodiment 3

[0040] On the basis of the second embodiment, in order to avoid major accidents such as explosion caused by the high air pressure inside the pressure vessel tank body 1: a connecting rod 723 is fixedly installed on the upper end of the movable circular plate 72, and a conical plate 724 is fixedly installed on the upper end of the connecting rod 723. The conical plate 724 is a conical block structure that is wider at the bottom and narrower at the top; the trigger actuator 8 includes a fixed ring plate 81, which is fixedly installed on the upper inner wall of the gas pipeline 3, and the inner ring surface of the fixed ring plate 81 is fixedly connected with a conical receiving groove plate 82, and a reserved groove 821 is opened at the upper end of the conical receiving groove plate 82. An annular support frame 83 is fixedly installed on the upper surface of the fixed ring plate 81, and a center ring 831 is fixedly connected to the upper end of the annular support frame 83, and a control switch 84 is fixedly installed on the inner ring surface of the center ring 831.

[0041] Once the gas pressure in the inner cavity of the pressure vessel tank body 1 is relatively high, the gas pressure instantly entering the gas pipe 3 increases. At this time, the movable circular plate 72 is affected by the thrust of the gas pressure, driving the connecting rod 723 and the conical plate 724 to push upward instantly, so that the conical plate 724 reaches the inner side of the conical receiving groove plate 82, and then the top position of the conical plate 724 contacts the control switch 84, thereby realizing the emergency triggering of the opening and closing mechanism 9 and effectively discharging the gas in the inner cavity of the gas storage chamber 40; the conical receiving groove plate 82 is fixedly mounted on the upper inner wall of the gas pipe 3 by the fixing ring plate 81, and the hollow volume of the inner side of the conical receiving groove plate 82 is slightly larger than the volume of the conical plate 724 at this time. The reason for this design is to avoid the conical plate 724 from being blocked by the reserved groove 821 when it is continuously in contact with the bottom end of the control switch 84 under the high gas pressure, so as not to affect the normal circulation of the gas pressure and avoid the impact damage to the gas pipe 3.

[0042] Embodiment 4

[0043] On the basis of the third embodiment, in order to realize the release of the gas temporarily stored in the inner cavity of the gas storage chamber 40: the execution opening and closing mechanism 9 includes a sleeve ring plate 91, an inner mounting ring plate 92 and a linkage assembly 93, the sleeve ring plate 91 is arranged on the inner cavity top surface of the gas storage chamber 40, and the outer ring surface of the sleeve ring plate 91 is fixedly connected to the inner wall of the lower end of the ventilation valve tube 5, the outer surface of the inner mounting ring plate 92 is fixedly connected to the inner ring surface of the sleeve ring plate 91, and the inner surface of the inner mounting ring plate 92 is provided with an annular groove 920, and the inner side of the annular groove 920 is movably installed with a linkage assembly 93; the linkage assembly 93 includes a support block 931 and a drive motor 932, the support block 931 is fixedly installed on the inner surface of the inner mounting ring plate 92, the drive motor 932 is fixedly installed on the upper end of the support block 931, and the output shaft of the drive motor 932 is fixedly connected with an active rotating gear 933, the outer surface of the active rotating gear 933 is meshed and rotated with a gear ring 934, the outer ring surface of the gear ring 934 is fixedly connected with a swivel 9341, the outer surface of the swivel 9341 is rotatably connected to the inner wall of the annular groove 920, the inner surface of the gear ring 934 is meshed and rotated with a driven gear, and five groups of driven gears are provided; a driven opening and closing component is provided on one side of the active rotating gear 933 and the driven gear, and the driven opening and closing component includes a connecting gear rod 941 and a closed triangular plate 942, the outer surface of the connecting gear rod 941 is slidably connected to the lower inner wall of the inner mounting ring plate 92, and a plurality of connecting gear rods 941 are provided, and the lower surfaces of the plurality of connecting gear rods 941 are respectively fixedly connected to the upper surface of the closed triangular plate 942, and the outer surfaces of the plurality of connecting gear rods 941 are meshed and rotated with the outer surfaces of the active rotating gear 933 and the driven gear.

[0044] When the control switch 84 contacts the conical plate 724, the emergency triggering execution opening and closing mechanism 9 is in working state. It should be noted that when the control switch 84 is not turned on, the inner cavity top surface of the gas storage chamber 40 is in a closed state, and the multiple sets of closed triangular plates 942 are in a closed state; when the execution opening and closing mechanism 9 is urgently triggered, specifically, refer to the attached Figure 8-10 As shown, the drive motor 932 receives the command from the control switch 84, controls the drive motor 932 to operate, so that its output shaft rotates, driving the active rotating gear 933 to rotate. Under the rotation of the active rotating gear 933, the gear ring 934 rotates, and at this time, multiple groups of driven gears rotate synchronously. At the same time, the six groups of connecting gears 941 are adapted to the outer surfaces of the active rotating gear 933 and the driven gear, so as to realize the coaxial movement of multiple groups of connecting gears 941 and the closed triangular plate 942. When the closed triangular plate 942 synchronously moves away from the inner mounting ring plate 92, the top surface of the inner cavity of the air storage chamber 40 is opened. When it is opened, the temporarily stored gas in the inner cavity of the air storage cylinder 4 is released into the interior of the ventilation valve tube 5, so as to avoid causing disturbance to the internal pressure of the air storage cylinder 4, and further solve the problem that it is difficult to maintain the internal air pressure of the cavity in the prior art, so as to stabilize the internal air pressure of the container and enhance the stability and explosion-proof performance of the pressure vessel.

[0045] In actual use, first, when it is necessary to release the gas pressure inside the pressure vessel tank body 1, the one-way valve 31 is controlled to open. At this time, the input port at the lower end of the gas transmission pipe 3 is opened, and a part of the circulating gas is transmitted through the circulation pipe 1 711 connected to the inner wall of the fixed circular plate 71. At this time, the gas pressure continues to push upward, and the blocking column 2 721 and the circulation pipe 2 722 set on the movable circular plate 72 are changed from the state of being adapted and staggered with the circulation pipe 1 711 and the blocking column 1 712 to a separated state. At this time, the gas at the lower part of the fixed circular plate 71 passes through the circulation pipe 1 711 connected to the inner wall of the fixed circular plate 71. The first tube 711 and the second plugging column 721 continue to circulate upward and are continuously transmitted to the inner cavity of the gas storage cylinder 4; subsequently, once the gas pressure in the inner cavity of the pressure vessel tank body 1 is relatively high, the gas pressure instantly entering the gas transmission pipe 3 increases. At this time, the movable circular plate 72 is affected by the thrust of the gas pressure, driving the connecting rod 723 and the conical plate 724 to push upward instantly, so that the conical plate 724 reaches the inner side of the conical receiving groove plate 82, and then the top position of the conical plate 724 contacts the control switch 84, thereby realizing the emergency triggering of the opening and closing mechanism 9, effectively controlling the gas storage cavity 40. The gas in the cavity is discharged; when the control switch 84 contacts the conical plate 724, the emergency trigger execution opening and closing mechanism 9 is in working state, and the drive motor 932 receives the command issued by the control switch 84, controls the drive motor 932 to operate, so that its output shaft rotates, drives the active rotating gear 933 to rotate, and under the rotation of the active rotating gear 933, the gear ring 934 rotates, and at this time, multiple groups of driven gears rotate synchronously. At the same time, the six groups of connecting gear rods 941 are adapted to the outer surfaces of the active rotating gear 933 and the driven gear, so that multiple groups of connecting gears are realized. The rod 941 and the closed triangle plate 942 move coaxially. When the closed triangle plate 942 moves synchronously toward the center away from the inner mounting ring plate 92, the top surface of the inner cavity of the gas storage chamber 40 is opened. When opened, the temporarily stored gas in the inner cavity of the gas cylinder 4 is released into the interior of the vent valve tube 5, avoiding causing disturbance of the internal pressure of the gas cylinder 4. Finally, when the pressure in the inner cavity of the pressure vessel tank body 1 and the gas storage chamber 40 is stabilized, the gas in the vent valve tube 5 is returned to the inner cavity of the pressure vessel tank body 1 through the solenoid valve at one end of the return pipe 6, avoiding gas leakage into the air to cause pollution.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety device for a pressure vessel, comprising a pressure vessel body (1), characterized in that: A support seat (2) is fixedly mounted on the upper end of the pressure vessel body (1); a gas cylinder (4) is fixedly connected to the inner side of the support seat (2); a gas pipe (3) is fixedly connected to the inner surface of the gas pipe (4); a check valve (31) is fixedly mounted on the outer surface of the lower end of the gas pipe (3); the outer surface of the check valve (31) is sealingly connected to the inner wall of the upper end of the pressure vessel body (1); a pressure release and stabilizing mechanism (7) is movably mounted inside the gas pipe (3); A trigger actuator (8) is arranged directly above the release and pressure stabilizing mechanism (7); a vent valve pipe (5) is connected through the upper end of the gas cylinder (4); an actuator opening and closing mechanism (9) is arranged between the vent valve pipe (5) and the gas cylinder (4); an inner cavity of the gas cylinder (4) is provided with a gas storage cavity (40); an output end of the vent valve pipe (5) is sealedly connected to a return pipe (6), and the other end of the return pipe (6) extends to the interior of the pressure vessel body (1); The release and pressure stabilizing mechanism (7) comprises a fixed circular plate (71) and a movable circular plate (72); the outer surface of the fixed circular plate (71) is fixedly connected to the inner wall of the lower end of the gas transmission pipe (3); a flow pipe (711) is connected through the inner wall of the fixed circular plate (71); a blocking column (712) is fixedly installed on the upper surface of the fixed circular plate (71); a receiving groove (730) is provided on the inner wall of the upper end of the fixed circular plate (71); a return spring (73) is fixedly installed on the bottom surface of the inner cavity of the return groove (730); the other end of the return spring (73) is fixedly connected to the lower surface of the movable circular plate (72); The trigger actuator (8) comprises a fixed ring plate (81), the fixed ring plate (81) is fixedly mounted on the upper inner wall of the gas transmission pipe (3), the inner ring surface of the fixed ring plate (81) is fixedly connected to a conical receiving groove plate (82), the upper end of the conical receiving groove plate (82) is provided with a reserved groove (821), the upper surface of the fixed ring plate (81) is fixedly mounted with an annular support frame (83), the upper end of the annular support frame (83) is fixedly connected to a center ring (831), and the inner ring surface of the center ring (831) is fixedly mounted with a control switch (84); The actuating opening and closing mechanism (9) comprises a sleeve ring plate (91), an inner mounting ring plate (92) and a linkage assembly (93); the sleeve ring plate (91) is arranged on the inner cavity top surface of the air storage cavity (40), and the outer ring surface of the sleeve ring plate (91) is fixedly connected to the inner wall of the lower end of the vent valve tube (5); the outer surface of the inner mounting ring plate (92) is fixedly connected to the inner ring surface of the sleeve ring plate (91); the inner surface of the inner mounting ring plate (92) is provided with an annular groove (920), and the linkage assembly (93) is movably mounted inside the annular groove (920).

2. A safety device for a pressure vessel according to claim 1, characterized in that: A lifting slot (30) is provided on the inner wall of the gas delivery pipe (3), and a lifting slider (720) is slidably connected to the inner wall of the lifting slot (30). Two groups of lifting sliders (720) are provided, and the two groups of lifting sliders (720) are fixedly mounted on the outer surfaces of both sides of a movable circular plate (72), and the outer surface of the movable circular plate (72) is movably connected to the inner wall of the gas delivery pipe (3).

3. A safety device for a pressure vessel according to claim 2, characterized in that: A second blocking column (721) is fixedly mounted on the lower surface of the movable circular plate (72), and the outer surface of the second blocking column (721) is movably plugged into the inner wall of the first flow tube (711). A second flow tube (722) is connected through the inner wall of the movable circular plate (72), and the inner surface of the second flow tube (722) is movably plugged into the outer surface of the first blocking column (712).

4. A safety device for a pressure vessel according to claim 3, characterized in that: A connecting rod (723) is fixedly mounted on the upper end of the movable circular plate (72), and a conical plate (724) is fixedly mounted on the upper end of the connecting rod (723). The conical plate (724) is in the form of a conical block structure that is wider at the bottom and narrower at the top.

5. A safety device for a pressure vessel according to claim 1, characterized in that: The cross section of the gas storage cylinder (4) is in the shape of a "concave" character as a whole, and the bottom surface of the inner cavity of the gas storage cavity (40) is provided with an air inlet (41).

6. A safety device for a pressure vessel according to claim 1, characterized in that: The linkage assembly (93) comprises a support block (931) and a drive motor (932); the support block (931) is fixedly mounted on the inner surface of the inner mounting ring plate (92); the drive motor (932) is fixedly mounted on the upper end of the support block (931); a driving rotating gear (933) is fixedly connected to the output shaft of the drive motor (932); a gear ring (934) is meshed and rotatably engaged on the outer surface of the driving rotating gear (933); a rotating ring (9341) is fixedly connected to the outer surface of the gear ring (934); the outer surface of the rotating ring (9341) is rotatably connected to the inner wall of the annular groove (920); a driven gear is meshed and rotatably engaged on the inner surface of the gear ring (934); and five groups of driven gears are provided.

7. A safety device for a pressure vessel according to claim 6, characterized in that: A driven opening and closing assembly is provided on one side of the active rotating gear (933) and the driven gear, and the driven opening and closing assembly comprises a connecting gear rod (941) and a closed triangular plate (942). The outer surface of the connecting gear rod (941) is slidably connected to the lower inner wall of the inner mounting ring plate (92). A plurality of connecting gear rods (941) are provided, and the lower surfaces of the plurality of connecting gear rods (941) are respectively fixedly connected to the upper surface of the closed triangular plate (942). The outer surfaces of the plurality of connecting gear rods (941) mesh and rotate with the outer surfaces of the active rotating gear (933) and the driven gear.

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