Explosion-proof liquefied petroleum gas steel cylinder

Abstract

The invention relates to the field of pressure storage containers, in particular to an explosion-proof liquefied petroleum gas steel cylinder which comprises a cylinder body, a gas outlet valve arranged at the top of the cylinder body, and a gas supply pipe arranged in the cylinder body, the top end of the gas supply pipe is communicated with the gas outlet valve, and the bottom end of the gas supply pipe is closed; the diameter of the outer side wall of the one-way plug is gradually decreased in the direction from top to bottom, a guide sleeve sliding in the air supply pipe is arranged at the top of the one-way plug, the guide sleeve is sleeved with a first compression spring supported between the axial side wall of the notch and the one-way plug, and through holes communicated with the air supply pipe are formed in the guide sleeve and the one-way plug. The explosion-proof oil gas steel cylinder has the effect of improving the explosion-proof performance.

Description

Technical Field

[0001] The present application relates to the field of pressure storage containers, and in particular to an explosion-proof liquefied petroleum gas cylinder. Background Art

[0002] LPG cylinders are containers used to store liquefied petroleum gas. These cylinders are usually made of high-strength steel or composite materials to withstand the high pressure and low temperature conditions of liquefied petroleum gas.

[0003] The related technology discloses a liquefied natural gas cylinder, in which an explosion-proof device is arranged inside the bottle body and is equipped with a tin column. When natural gas leaks and burns under the action of a fire source, the tin column will melt due to the high temperature, thereby triggering the explosion-proof device to avoid continuous leakage of natural gas.

[0004] However, in real life, there may be no open flame in the surrounding environment, resulting in the leakage of natural gas not burning, and the tin column naturally not melting to trigger the explosion-proof device, causing the explosion-proof device to fail, which is obviously insufficient. Summary of the invention

[0005] In order to improve the problem that the explosion-proof device may fail, the present application provides an explosion-proof liquefied petroleum gas cylinder.

[0006] The explosion-proof liquefied petroleum gas cylinder provided in this application adopts the following technical solution: An explosion-proof liquefied petroleum gas cylinder comprises a bottle body, an air outlet valve arranged on the top of the bottle body, an air supply pipe whose top end is connected to the air outlet valve and whose bottom end is closed is arranged in the bottle body, a notch is axially opened on the air supply pipe, a one-way plug is slidably arranged at the notch to block the air supply pipe, the diameter of the outer wall of the one-way plug gradually decreases from top to bottom, a guide sleeve is arranged on the top of the one-way plug to slide in the air supply pipe, a first compression spring is sleeved on the guide sleeve to support between the axial side wall of the notch and the one-way plug, and a through hole connected to the air supply pipe is opened on the guide sleeve and the one-way plug; the bottle body A valve seat connected to its inner cavity is also arranged on the outside, and a sliding column slides inside the valve seat, a metal wire is tied between the sliding column and the one-way plug, a screw is threadedly connected to the valve seat, a pull wire is tied between the screw and the sliding column, a second compression spring is supported between the side of the sliding column facing away from the outer cavity of the bottle body and the inner wall of the valve seat, a telescopic cylinder is arranged outside the valve seat, the telescopic rod of the telescopic cylinder extends to the valve seat where an inner blade ring is arranged, the pull wire passes through the inner blade ring, and a sensor that can detect whether there is a leak of petroleum gas is also arranged outside the bottle body, and the sensor and the telescopic cylinder are both electrically connected to the control system.

[0007] By adopting the above technical solution, when the sensor detects that there is a leak of LPG in the surrounding environment, the control system operates the telescopic rod to retract, thereby driving the inner blade ring knife to cut the pull wire, and then the second compression spring pushes the slide column to move into the bottle body, and the first compression spring pushes the one-way plug to insert into the air delivery pipe, thereby isolating the air delivery pipe from the inner cavity of the bottle body, and the LPG in the bottle body will not enter the air delivery pipe through the gap, thereby achieving an explosion-proof effect. The present application triggers explosion-proof by the sensor in conjunction with the control system, which is not affected by the external temperature, thereby reducing the possibility of failure of the explosion-proof function.

[0008] Optionally, a receiving cone groove for accommodating a one-way plug is formed at a position of the air delivery pipe relative to the notch, and when the cylinder is being transported, the circumferential outer side wall of the one-way plug is completely located in the receiving cone groove.

[0009] By adopting the above technical solution, the one-way plug is completely located in the accommodating cone groove, thereby avoiding the possibility that the high pressure in the bottle body acts on the inclined side wall of the one-way plug, causing the air supply pipe and the inner cavity of the bottle body to accidentally connect and leak.

[0010] Optionally, a plurality of partitions are axially arranged in the bottle body, and the plurality of partitions divide the inner cavity of the bottle body into a plurality of air storage chambers. The air supply pipe is fixedly passed through the plurality of partitions, and a notch is provided on the air supply pipe at a position corresponding to each air storage chamber. The metal wire is fixedly passed through a plurality of one-way plugs.

[0011] By adopting the above technical solution, when the pull wire is cut, multiple gas storage chambers are in a closed state and do not interfere with each other. When the bottle body is subjected to strong external damage, only the broken gas storage chamber will leak, and the other gas storage chambers can still remain intact, thereby reducing the leakage of petroleum gas and further weakening the scope of harm caused by petroleum gas leakage.

[0012] Optionally, the partition is welded to the inner wall of the bottle body.

[0013] By adopting the above technical solution, welding ensures the stability of the connection between the bottle body and the partition and reduces the possibility of air leakage.

[0014] Optionally, a sealing groove is circumferentially opened on the circumferential outer wall of the sliding column, and a sealing ring is arranged in the sealing groove and is tightly attached to the inner wall of the valve seat.

[0015] By adopting the above technical solution, the sealing ring improves the sealing performance between the sliding column and the inner wall of the valve seat.

[0016] Optionally, an elastic conductive sheet is arranged on the other side of the inner wall of the valve seat opposite to the telescopic cylinder, an independent power supply group is arranged outside the bottle body, and a third compression spring is sleeved on the telescopic rod of the telescopic cylinder. The third compression spring is supported between the inner wall of the valve seat and the inner blade ring knife. When the mains power is cut off, the third compression spring pushes the inner blade ring knife to contact the elastic conductive sheet, and a closed circuit is formed between the elastic conductive sheet, the telescopic cylinder, the inner blade ring knife, the independent power supply group and the sensor.

[0017] By adopting the above technical solution, when the cylinder is in normal use, its control system is connected to the mains. However, when the power is off, the third compression spring pushes the inner blade ring to contact the elastic conductive sheet, and a closed circuit is formed between the elastic conductive sheet, the telescopic cylinder, the inner blade ring, the independent power supply group and the sensor, so that the detection and explosion-proof functions when the mains power is off are guaranteed by the independent power supply group, eliminating the detection and explosion-proof time blind spot.

[0018] Optionally, the vertical power supply group uses dry batteries.

[0019] By adopting the above technical solution, the replacement of dry batteries is relatively simple.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the sensor detects that there is a leak of LPG in the surrounding environment, the control system operates the telescopic rod to retract, thereby driving the inner blade ring knife to cut the pull wire, and then the second compression spring pushes the slide column to move into the bottle body, and the first compression spring pushes the one-way plug to insert into the air delivery pipe, thereby isolating the air delivery pipe from the bottle body cavity, and the LPG in the bottle body will not enter the air delivery pipe through the gap, thereby achieving an explosion-proof effect. This application triggers explosion-proof by the sensor in conjunction with the control system, which is not affected by the external temperature, thereby reducing the possibility of failure of the explosion-proof function; 2. When the pull wire is cut, multiple gas storage chambers are in a closed state and do not interfere with each other. When the bottle body is subjected to strong external damage, only the broken gas storage chamber will leak, and the other gas storage chambers can still remain intact, thereby reducing the amount of LPG leakage and further weakening the scope of harm caused by LPG leakage; 3. When the cylinder is in normal use, its control system is connected to the mains. However, when the power is off, the third compression spring pushes the inner blade ring to contact the elastic conductive sheet, and a closed circuit is formed between the elastic conductive sheet, the telescopic cylinder, the inner blade ring, the independent power supply group and the sensor, thereby ensuring the detection and explosion-proof functions when the mains power is off through the independent power supply group, eliminating the detection and explosion-proof time blind spot. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0022] Figure 2 It is a cross-sectional view of an embodiment of the present application.

[0023] Figure 3 yes Figure 2 Enlarged view of part A.

[0024] Figure 4 yes Figure 2 Enlarged view of part B.

[0025] Explanation of the reference numerals in the accompanying drawings: 1. Bottle body; 2. Air outlet valve; 3. Air supply pipe; 31. Notch; 4. One-way plug; 5. Guide sleeve; 6. First compression spring; 7. Through hole; 8. Valve seat; 9. Sliding column; 10. Metal wire; 11. Screw; 12. Pull wire; 13. Second compression spring; 14. Telescopic cylinder; 15. Inner blade ring; 16. Sensor; 17. Accommodating cone groove; 18. Partition; 19. Air storage chamber; 20. Sealing ring; 21. Elastic conductive sheet; 22. Third compression spring; 23. Independent power supply group. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-4 This application is described in further detail.

[0027] The embodiment of the present application discloses an explosion-proof liquefied petroleum gas cylinder.

[0028] Reference Figure 1 , Figure 2 and Figure 3 The explosion-proof liquefied petroleum gas cylinder includes a bottle body 1, an air outlet valve 2 arranged on the top of the bottle body 1, a vertical air supply pipe 3 is arranged in the bottle body 1, the bottom end of the air supply pipe 3 is closed and the top end is connected to the air outlet valve 2.

[0029] A plurality of notches 31 are axially spaced apart on the air supply pipe 3, and a partition 18 is arranged between two adjacent notches 31 in the bottle body 1. The partition 18 is welded to the inner wall of the bottle body 1 and the air supply pipe 3, and the plurality of partitions 18 cooperate to divide the inner cavity of the bottle body 1 into a plurality of air storage cavities 19.

[0030] Reference Figure 1 , Figure 2 and Figure 3 A one-way plug 4 is slidably disposed at the notch 31, and the diameter of the outer wall of the one-way plug 4 gradually decreases from top to bottom. A guide sleeve 5 is integrally formed at the top of the one-way plug 4 and slides in the air supply pipe 3. The guide sleeve 5 is sleeved with a first compression spring 6 that is supported between the axial side wall of the notch 31 and the one-way plug 4. A through hole 7 that is connected to the air supply pipe 3 is opened on the guide sleeve 5 and the one-way plug 4.

[0031] Reference Figure 2 , Figure 3 and Figure 4A hollow valve seat 8 is connected to the outer wall of the top of the bottle body 1, a sliding column 9 slides inside the valve seat 8, a metal wire 10 is tied between the sliding column 9 and the one-way plug 4, the metal wire 10 is fixed through each one-way plug 4, a screw 11 is threadedly connected to the valve seat 8, a pull wire 12 is tied between the screw 11 and the sliding column 9, and a second compression spring 13 is supported between the side of the sliding column 9 facing away from the inner cavity of the bottle body 1 and the inner wall of the valve seat 8.

[0032] A telescopic cylinder 14 is bolted to the outer wall of the valve seat 8, and the telescopic rod of the telescopic cylinder 14 extends into the valve seat 8 and is threadedly connected to an inner blade ring 15, through which the pull wire 12 passes. A sensor 16 is also threadedly connected to the outer wall of the top of the bottle body 1, and the sensor 16 can detect the concentration of petroleum gas in the external environment. The sensor 16 and the telescopic cylinder 14 are both electrically connected to the control system.

[0033] Reference Figure 2 , Figure 3 and Figure 4 When inflating, the worker twists the screw 11 in advance, so that the slide column 9 is pulled out of the bottle body 1 through the pull wire 12. The slide column 9 pulls each one-way plug 4 through the metal wire 10 to squeeze the first compression spring 6. The one-way plug 4 releases the partition between the air supply pipe 3 and the bottle body 1, and the external inflation equipment can add LPG to the bottle body 1 through the outlet valve 2 and the air supply pipe 3.

[0034] Reference Figure 2 , Figure 3 and Figure 4 After the inflation is completed, the air outlet valve 2 is closed, and the worker reverses the screw 11. The second compression spring 13 pushes the end of the one-way plug 4 to reinsert into the air delivery pipe 3, thereby isolating the air delivery pipe 3 and the inner cavity of the bottle body 1, reducing the possibility of air leakage during the transportation of the cylinder.

[0035] Reference Figure 2 , Figure 3 and Figure 4 A accommodating conical groove 17 for accommodating the one-way plug 4 is provided at a position of the air delivery pipe 3 relative to the notch 31. When the cylinder is being transported, the circumferential outer wall of the one-way plug 4 is completely located in the accommodating conical groove 17, thereby reducing the effect of the high pressure in the bottle body 1 on the inclined side wall of the one-way plug 4, resulting in the loss of the partition effect of the one-way plug 4 and the possibility of accidental leakage of petroleum gas.

[0036] Reference Figure 2 , Figure 3 and Figure 4 A sealing groove (not shown in the figure) is opened circumferentially on the circumferential outer wall of the sliding column 9, and a sealing ring 20 is arranged in the sealing groove and is close to the inner wall of the valve seat 8. The arrangement of the sealing ring 20 improves the sealing performance of the cylinder and reduces the possibility of air leakage between the sliding column 9 and the valve seat 8.

[0037] Reference Figure 2, Figure 3 and Figure 4 When the cylinder is in use, the sensor 16 is connected to the mains, which can detect the concentration of petroleum gas around the cylinder in real time. When the concentration exceeds the standard, it is determined that there is a leak, and the control system sends an electrical signal to the telescopic cylinder 14.

[0038] At this time, the telescopic rod of the telescopic cylinder 14 retracts, thereby driving the inner blade ring knife 15 to cut the pull wire 12, so that the pulling effect of the pull wire 12 on the sliding column 9 disappears, and the first compression spring 6 pushes the one-way plug 4 to block the air supply pipe 3, thereby isolating the air supply pipe 3 from the inner cavity of the bottle body 1, thereby exerting the explosion-proof function.

[0039] Reference Figure 2 , Figure 3 and Figure 4 However, when the circuit system fails and needs to be repaired, the city power supply stops. Therefore, if a backup power supply device is not provided, the explosion-proof air supply of the one-way plug 4 and the sliding column 9 will fail periodically during the city power outage.

[0040] Reference Figure 2 , Figure 3 and Figure 4 To this end, an elastic conductive sheet 21 is riveted on the other side of the inner wall of the valve seat 8 relative to the telescopic cylinder 14, and an independent power supply group 23 is arranged outside the bottle body 1. The independent power supply group 23 uses dry batteries in the prior art, which is convenient for users to replace regularly.

[0041] A third compression spring 22 is sleeved on the telescopic rod of the telescopic cylinder 14, and the third compression spring 22 is supported between the inner wall of the valve seat 8 and the inner blade ring 15. When the city power is cut off, the third compression spring 22 pushes the inner blade ring 15 to contact the elastic conductive sheet 21, and a closed circuit is formed between the elastic conductive sheet 21, the telescopic cylinder 14, the inner blade ring 15, the independent power supply group 23 and the sensor 16.

[0042] Reference Figure 2 , Figure 3 and Figure 4 During the power outage of the city power, the sensor 16 and the telescopic cylinder 14 are independently powered by the independent power supply group 23, thereby eliminating the time blind spot of explosion-proof failure.

[0043] The implementation principle of an explosion-proof liquefied petroleum gas cylinder in the embodiment of the present application is: When the cylinder is in use, the sensor 16 is connected to the mains, and can detect the concentration of LPG around the cylinder in real time. When the concentration exceeds the standard, it is determined that there is a leak, so that the control system sends an electrical signal to the telescopic cylinder 14. At this time, the telescopic rod of the telescopic cylinder 14 retracts, thereby driving the inner blade ring knife 15 to cut the pull wire 12, so that the pulling effect of the pull wire 12 on the slide column 9 disappears, and the first compression spring 6 pushes the one-way plug 4 to block the air delivery pipe 3, thereby isolating the air delivery pipe 3 from the inner cavity of the bottle body 1, so as to play the explosion-proof function.

[0044] When the city power is cut off, the third compression spring 22 pushes the inner blade ring 15 to contact the elastic conductive sheet 21, and a closed circuit is formed between the elastic conductive sheet 21, the telescopic cylinder 14, the inner blade ring 15, the independent power supply group 23 and the sensor 16. The sensor 16 and the telescopic cylinder 14 are independently powered by the independent power supply group 23, thereby eliminating the time blind spot of explosion-proof failure.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An explosion-proof liquefied petroleum gas cylinder, characterized in that: The invention comprises a bottle body (1), an air outlet valve (2) arranged at the top of the bottle body (1), an air supply pipe (3) whose top end is connected to the air outlet valve (2) and whose bottom end is closed is arranged in the bottle body (1), a notch (31) is axially provided on the air supply pipe (3), a one-way plug (4) is slidably provided at the notch (31) to block the air supply pipe (3), the diameter of the outer wall of the one-way plug (4) gradually decreases from top to bottom, a guide sleeve (5) is arranged at the top of the one-way plug (4) to slide in the air supply pipe (3), a first compression spring (6) is sleeved on the guide sleeve (5) and is supported between the axial side wall of the notch (31) and the one-way plug (4), and a through hole (7) connected to the air supply pipe (3) is opened on the guide sleeve (5) and the one-way plug (4); The bottle body (1) is also provided with a valve seat (8) connected to its inner cavity on the outside, a sliding column (9) is slidably disposed inside the valve seat (8), a metal wire (10) is connected between the sliding column (9) and the one-way plug (4), a screw rod (11) is threadedly connected to the valve seat (8), a pull wire (12) is connected between the screw rod (11) and the sliding column (9), a second compression spring (13) is supported between the side of the sliding column (9) facing away from the inner cavity of the bottle body (1) and the inner wall of the valve seat (8), a telescopic cylinder (14) is arranged outside the valve seat (8), the telescopic rod of the telescopic cylinder (14) extends to the valve seat (8) and is provided with an inner blade ring knife (15), the pull wire (12) passes through the inner blade ring knife (15), and a sensor (16) capable of detecting whether petroleum gas is leaking is also arranged outside the bottle body (1), and the sensor (16) and the telescopic cylinder (14) are both electrically connected to a control system.

2. The explosion-proof liquefied petroleum gas cylinder according to claim 1, characterized in that: The air delivery pipe (3) is provided with a receiving conical groove (17) for receiving the one-way plug (4) at a position opposite to the notch (31). When the cylinder is in the process of transportation, the circumferential outer side wall of the one-way plug (4) is completely located in the receiving conical groove (17).

3. The explosion-proof liquefied petroleum gas cylinder according to claim 1, characterized in that: A plurality of partitions (18) are axially arranged in the bottle body (1), and the plurality of partitions (18) divide the inner cavity of the bottle body (1) into a plurality of gas storage chambers (19). The gas supply pipe (3) is fixedly passed through the plurality of partitions (18), and one notch (31) is provided on the gas supply pipe (3) at a position corresponding to each gas storage chamber (19). The metal wire (10) is fixedly passed through a plurality of one-way plugs (4).

4. The explosion-proof liquefied petroleum gas cylinder according to claim 3 is characterized in that: The partition (18) is welded to the inner wall of the bottle body (1).

5. The explosion-proof liquefied petroleum gas cylinder according to claim 1, characterized in that: A sealing groove is circumferentially formed on the circumferential outer wall of the sliding column (9), and a sealing ring (20) is arranged in the sealing groove and is in close contact with the inner wall of the valve seat (8).

6. The explosion-proof liquefied petroleum gas cylinder according to claim 1, characterized in that: An elastic conductive sheet (21) is arranged on the other side of the inner wall of the valve seat (8) relative to the telescopic cylinder (14), an independent power supply group (23) is arranged outside the bottle body (1), and a third compression spring (22) is sleeved on the telescopic rod of the telescopic cylinder (14). The third compression spring (22) is supported between the inner wall of the valve seat (8) and the inner blade ring (15). When the mains power is cut off, the third compression spring (22) pushes the inner blade ring (15) to contact the elastic conductive sheet (21), and a closed circuit is formed between the elastic conductive sheet (21), the telescopic cylinder (14), the inner blade ring (15), the independent power supply group (23) and the sensor (16).

7. The explosion-proof liquefied petroleum gas cylinder according to claim 6, characterized in that: The vertical power supply group adopts dry batteries.

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