Complementation device for pressure charging and pressure relief of liquefied petroleum gas storage tank

Abstract

The utility model discloses a liquefied petroleum gas storage tank pressurization and pressure relief complementary device which comprises a machine shell, a flow channel is formed in the inner wall of the machine shell, two cavities are formed in the inner wall of the machine shell, a through hole is formed in the inner side wall of each cavity, and a first sealing block and a second sealing block are arranged in the two cavities respectively. And a first sealing gasket is fixedly embedded in the left side surface of the first sealing block. According to the device, an air inlet valve rod and a pressure release valve rod are arranged, so that a first sealing block and a second sealing block can be controlled to move, then a first sealing gasket and a third sealing gasket can seal a flow channel in a machine shell, flowing of liquefied gas can be controlled, and through cooperation of the pressure release valve rod and the second sealing block, the pressure release valve rod is matched with the second sealing block; when the second sealing block moves downwards to seal the runner, the second sealing block and the pressure relief hole are staggered, waste gas can be discharged through the pressure relief hole, an air inlet valve rod does not need to be controlled during pressure relief, and therefore the operation steps can be reduced, and the filling efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief of liquefied petroleum gas storage tanks, in particular to a complementary pressure charging and pressure relief device for liquefied petroleum gas storage tanks. Background Art

[0002] Liquefied petroleum gas storage tanks include compressed gas or liquefied gas storage tanks. Liquefied petroleum gas storage tanks can be divided into fixed volume storage tanks and movable volume storage tanks according to whether the volume of the container changes. Large fixed volume liquefied petroleum gas storage tanks are made into spherical shapes, while small ones are made into cylindrical shapes.

[0003] At present, when filling the liquefied gas inside the liquefied petroleum gas storage tank into a smaller storage tank, a pressure charging and pressure relief complementary device is required to enable the storage tank to discharge the gas. However, the current pressure charging and pressure relief complementary device requires the operator to discharge the gas inside the storage bottle when the pressure inside the storage tank is high. Therefore, in actual use, the staff needs to operate different valve stems multiple times during the pressure relief process to stop the flow of liquefied gas and discharge the exhaust gas, which makes the operation during the pressure relief process cumbersome.

[0004] Therefore, we propose a liquefied petroleum gas storage tank pressure charging and relief complementary device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a complementary device for charging and releasing pressure of a liquefied petroleum gas storage tank to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A complementary device for charging and releasing pressure of a liquefied petroleum gas storage tank includes a casing, an inner wall of the casing is provided with a flow channel, the inner wall of the casing is provided with two cavities, the inner side wall of each cavity is provided with a through hole, a first sealing block and a second sealing block are respectively provided inside the two cavities, a first sealing gasket is fixedly inlaid on the left side of the first sealing block, a second sealing gasket is fixedly inlaid on the front side of the second sealing block, a third sealing gasket is fixedly inlaid on the left side of the second sealing block, a first threaded hole is provided on the upper surface of the first sealing block, a second threaded hole is provided on the upper surface of the second sealing block, and the two The inner top wall of the cavity is rotatably connected to the intake valve stem and the pressure relief valve stem through two sealing bearings. The bottom end of the intake valve stem extends to the inside of the first threaded hole, and the intake valve stem is threadedly connected to the first threaded hole. The bottom end of the pressure relief valve stem extends to the inside of the second threaded hole, and the second threaded hole is threadedly connected to the pressure relief valve stem. Two baffles are provided on the right side of the second sealing block, and the upper surface of each baffle is fixedly connected to the upper surface of one of the cavities. The left and right side surfaces of the casing are fixedly connected with a connecting seat. A pressure relief hole is provided on the front of the casing, and the pressure relief hole is located in front of the second sealing block.

[0008] In a further embodiment, a connector is threadedly connected to the outer surface of each connecting seat, and side surfaces of the two connecting heads that are away from each other are fixedly connected to a conduit.

[0009] In a further embodiment, a first sealing ring is sleeved on the outer surface of the intake valve stem, and a bottom surface of the first sealing ring is fixedly connected to an upper surface of the first sealing block.

[0010] In a further embodiment, a second sealing ring is sleeved on the outer surface of the pressure relief valve stem, and the bottom surface of the second sealing ring is fixedly connected to the upper surface of the second sealing block.

[0011] In a further embodiment, a limiting plate is provided in front of each blocking rod and at the rear of each blocking rod, and the left sides of the two groups of limiting plates are fixedly connected to the right side of the second sealing block.

[0012] In a further embodiment, liquefied tank connectors are provided on both the left and right sides of the housing, and the side surfaces of the two liquefied tank connectors close to each other are fixedly connected to the ends of the two conduits away from each other.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. This device can control the movement of the first sealing block and the second sealing block by providing an air intake valve stem and a pressure relief valve stem, thereby enabling the first sealing gasket and the third sealing gasket to seal the flow channel inside the casing, thereby controlling the flow of liquefied gas. In addition, by utilizing the cooperation of the pressure relief valve stem and the second sealing block, the second sealing block can be dislocated from the pressure relief hole while the second sealing block moves downward to seal the flow channel, so that the pressure relief hole can discharge the exhaust gas. In addition, there is no need to control the air intake valve stem during pressure relief, thereby reducing the operating steps and improving the filling efficiency.

[0015] 2. The device is provided with a connector that can be easily connected to the catheter, and the catheter can connect the device to the liquefied tank through the liquefied tank connector, ensuring that the liquefied gas can be filled. In addition, the second sealing gasket can be provided to close the pressure relief hole when the second sealing block opens the flow channel, thereby avoiding leakage during liquefied gas filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the liquefied petroleum gas storage tank pressure charging and relief complementary device.

[0017] Figure 2 This is a structural schematic diagram of the front cross-section of the casing of the liquefied petroleum gas storage tank pressure charging and relief complementary device.

[0018] Figure 3 This is a structural schematic diagram of the first sealing block of the liquefied petroleum gas storage tank pressure charging and relief complementary device.

[0019] Figure 4 This is a structural schematic diagram of the second sealing block of the liquefied petroleum gas storage tank pressure charging and relief complementary device.

[0020] Figure 5 This is a structural schematic diagram of the front cross-section of the second sealing block of the liquefied petroleum gas storage tank pressure charging and relief complementary device.

[0021] In the figure: 1. casing; 2. intake valve stem; 3. pressure relief valve stem; 4. pressure relief hole; 5. connector; 6. conduit; 7. liquefied tank connector; 8. connector seat; 9. through hole; 10. cavity; 11. flow channel; 12. stop rod; 13. first sealing block; 14. second sealing block; 15. second sealing gasket; 16. first sealing gasket; 17. first sealing ring; 18. first threaded hole; 19. second threaded hole; 20. limit plate; 21. second sealing ring; 22. third sealing gasket. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-5 In the present invention, a complementary device for charging and releasing pressure of a liquefied petroleum gas storage tank includes a casing 1, an inner wall of the casing 1 is provided with a flow channel 11, an inner wall of the casing 1 is provided with two cavities 10, an inner wall of each cavity 10 is provided with a through hole 9, a first sealing block 13 and a second sealing block 14 are provided inside the two cavities 10, a first sealing block 16 is fixedly embedded on the left side of the first sealing block 13, a second sealing gasket 15 is fixedly embedded on the front side of the second sealing block 14, a third sealing gasket 22 is fixedly embedded on the left side of the second sealing block 14, a first threaded hole 18 is provided on the upper surface of the first sealing block 13, and a second threaded hole 18 is provided on the upper surface of the second sealing block 14 Hole 19, the inner top walls of the two cavities 10 are rotatably connected to the intake valve stem 2 and the pressure relief valve stem 3 through two sealed bearings, the bottom end of the intake valve stem 2 extends to the inside of the first threaded hole 18, the intake valve stem 2 is threadedly connected to the first threaded hole 18, the bottom end of the pressure relief valve stem 3 extends to the inside of the second threaded hole 19, the second threaded hole 19 is threadedly connected to the pressure relief valve stem 3, two baffle rods 12 are provided on the right side of the second sealing block 14, the upper surface of each baffle rod 12 is fixedly connected to the upper surface of one of the cavities 10, the left and right side surfaces of the casing 1 are fixedly connected with a connecting seat 8, and a pressure relief hole 4 is provided on the front of the casing 1, and the pressure relief hole 4 is located in front of the second sealing block 14.

[0024] The outer surface of each connecting seat 8 is threadedly connected to a connector 5, and the side surfaces of the two connectors 5 away from each other are fixedly connected to a conduit 6, which can be connected to the casing 1 through the conduit 6 and the connector 5, so that the liquefied gas can enter the interior of the casing 1, and the outer surface of the intake valve stem 2 is sleeved with a first sealing ring 17, and the bottom surface of the first sealing ring 17 is fixedly connected to the upper surface of the first sealing block 13. The first sealing ring 17 can increase the sealing performance of the connection between the intake valve stem 2 and the first sealing block 13 to avoid air leakage. The outer surface of the pressure relief valve stem 3 is sleeved with a second sealing ring 21, and the bottom surface of the second sealing ring 21 is fixedly connected to the upper surface of the second sealing block 14. The second sealing ring 21 is provided to increase the sealing performance of the connection between the pressure relief valve stem 3 and the second sealing block 14 to prevent air leakage during operation.

[0025] A limit plate 20 is provided in front of each baffle rod 12 and behind the baffle rod 12. The left sides of the two sets of limit plates 20 are fixedly connected to the right side of the second sealing block 14. The limit plates 20 can guide the second sealing block 14 to prevent the second sealing block 14 from being misplaced. Liquefaction tank connectors 7 are provided on the left and right sides of the casing 1. The side surfaces of the two liquefaction tank connectors 7 that are close to each other are fixedly connected to the ends of the two conduits 6 that are away from each other. The liquefaction tank connector 7 can be conveniently connected to the liquefaction tank.

[0026] The working principle of this utility model is:

[0027] When in use, the liquefied tank connector 7 on the left side of the device is connected to the large liquefied gas tank of the equipment, and then the right liquefied tank connector 7 is connected to the smaller storage tank, and the small storage tank is placed below the large liquefied gas tank. The air inlet valve stem 2 is rotated so that the air inlet valve stem 2 is threadedly connected to the first threaded hole 18 to control the first sealing block 13 to move upward, and then the pressure relief valve stem 3 is rotated so that the pressure relief valve stem 3 controls the second sealing block 14 to move upward, so that the liquefied gas enters the interior of the casing 1 through the conduit 6 and passes through the flow channel 11 into the right conduit 6, and the liquefied gas is injected into the storage tank. As the liquefied gas is injected, the internal pressure of the storage tank increases, and the pressure relief valve stem 3 is rotated so that the pressure relief valve stem 3 controls the second sealing block 14 to move downward, so that the second sealing block 14 seals the flow channel 11 through the third sealing gasket 22. At the same time, since the second sealing block 14 moves downward, the pressure relief hole 4 can be opened, so that the exhaust gas inside the storage tank is discharged through the right conduit 6 and the pressure relief hole 4.

[0028] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A complementary device for charging and releasing pressure of a liquefied petroleum gas storage tank, characterized by: The invention comprises a housing (1), wherein the inner wall of the housing (1) is provided with a flow channel (11), the inner wall of the housing (1) is provided with two cavities (10), the inner wall of each cavity (10) is provided with a through hole (9), a first sealing block (13) and a second sealing block (14) are respectively provided inside the two cavities (10), a first sealing gasket (16) is fixedly embedded on the left side of the first sealing block (13), a second sealing gasket (15) is fixedly embedded on the front side of the second sealing block (14), a third sealing gasket (22) is fixedly embedded on the left side of the second sealing block (14), a first threaded hole (18) is provided on the upper surface of the first sealing block (13), a second threaded hole (19) is provided on the upper surface of the second sealing block (14), and the two cavities (10) are provided with a plurality of through holes (11). The inner top wall is rotatably connected to an intake valve stem (2) and a pressure relief valve stem (3) through two sealing bearings, the bottom end of the intake valve stem (2) extends to the inside of the first threaded hole (18), the intake valve stem (2) is threadedly connected to the first threaded hole (18), the bottom end of the pressure relief valve stem (3) extends to the inside of the second threaded hole (19), the second threaded hole (19) is threadedly connected to the pressure relief valve stem (3), two baffles (12) are provided on the right side of the second sealing block (14), the upper surface of each baffle (12) is fixedly connected to the upper surface of one of the cavities (10), the left and right side surfaces of the casing (1) are fixedly connected to a connecting seat (8), the front of the casing (1) is provided with a pressure relief hole (4), and the pressure relief hole (4) is located in front of the second sealing block (14).

2. The liquefied petroleum gas storage tank pressure charging and pressure relief complementary device according to claim 1, characterized in that: The outer surface of each connecting seat (8) is threadedly connected to a connecting head (5), and the side surfaces of the two connecting heads (5) that are away from each other are fixedly connected to a conduit (6).

3. The liquefied petroleum gas storage tank pressure charging and pressure relief complementary device according to claim 1, characterized in that: The outer surface of the intake valve stem (2) is sleeved with a first sealing ring (17), and the bottom surface of the first sealing ring (17) is fixedly connected to the upper surface of the first sealing block (13).

4. The liquefied petroleum gas storage tank pressure charging and pressure relief complementary device according to claim 1, characterized in that: The outer surface of the pressure relief valve stem (3) is sleeved with a second sealing ring (21), and the bottom surface of the second sealing ring (21) is fixedly connected to the upper surface of the second sealing block (14).

5. The liquefied petroleum gas storage tank pressure charging and pressure relief complementary device according to claim 1, characterized in that: A limiting plate (20) is provided in front of each blocking rod (12) and behind each blocking rod (12), and the left sides of the two groups of limiting plates (20) are fixedly connected to the right side of the second sealing block (14).

6. The liquefied petroleum gas storage tank pressure charging and pressure relief complementary device according to claim 2, characterized in that: Liquefaction tank connectors (7) are provided on both the left and right sides of the casing (1), and the sides of the two liquefaction tank connectors (7) that are close to each other are fixedly connected to the ends of the two conduits (6) that are away from each other.

Images