Dry gas sealing device

Abstract

The utility model relates to the technical field of sealing devices, in particular to a dry gas sealing device. According to the technical scheme, the device comprises a top cover, a sealing pipe, a movable disc and a sealing disc, a flange is fixed to the outer side of an opening in the lower end of the sealing pipe, a valve disc is fixed to the lower end in the sealing pipe, a through groove is formed in the middle of the valve disc, a connecting pipe is fixed to an opening in the upper end of the sealing pipe, and the top cover is installed at the upper end of the connecting pipe in a threaded mode; a butt joint pipe is installed in the middle of the top cover in a penetrating mode, a fixing frame is fixed to the lower end of the inner side of the butt joint pipe, a telescopic rod is fixed to the lower end face of the fixing frame, the lower end of the telescopic rod is fixed to a sealing disc, the lower end of the telescopic rod is fixedly sleeved with a spring, and the lower end of the spring is fixed to the sealing disc. The movable disc is located at the upper end in the sealing pipe. The utility model has the advantages that the built-in double seal is provided, the use safety is ensured, the split type detachable mechanism is provided, and the maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing devices, in particular to a dry gas sealing device. Background Art

[0002] Dry gas: a natural gas whose main component is methane, usually with a content of more than 95%. It is produced during the development of oil fields and can be extracted into liquefied gas and light oil after dehydration, purification and light hydrocarbon recovery processes.

[0003] Dry gas needs to be stored in a storage device and needs to be exported to the outside when used. The exhaust pipe of the existing dry gas storage device needs to be connected to a sealing device to ensure its exhaust safety. The existing sealing device has a relatively simple structure, and most of them use an internal single valve body mechanism to close the passage, which has low safety; and most of the existing sealing mechanisms adopt an integral structural design, which is not convenient for maintenance after disassembly. Utility Model Content

[0004] The utility model aims to provide a dry gas sealing device with built-in double sealing to ensure safety in use and a split detachable mechanism for easy maintenance, thereby solving the problems in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a dry gas sealing device, comprising a top cover, a sealing tube, a movable disk and a sealing disk, a flange is fixed on the outer side of the lower end opening of the sealing tube, a valve disk is fixed on the inner lower end of the sealing tube, and a through groove is opened in the middle of the valve disk, a connecting pipe is fixed at the upper end opening of the sealing tube, the top cover is threadedly installed on the upper end of the connecting pipe, a docking tube is installed through the middle of the top cover, a fixing frame is fixed on the inner lower end of the docking tube, a telescopic rod is fixed on the lower end surface of the fixing frame, and the lower end of the telescopic rod is fixed on the sealing disk, a spring is fixed on the lower end of the telescopic rod, and the lower end of the spring is fixed on the sealing disk, the movable disk is located at the inner upper end of the sealing tube, an air outlet is opened in an annular array on the outer side of the movable disk, a pressure cover is fixed on the lower end surface of the movable disk, and the pressure cover corresponds to the upper end of the through groove.

[0006] When using a dry gas sealing device in the technical solution, the device is connected to an external exhaust device through a flange, and the docking pipe is connected to the exhaust pipe port of the storage device through a pipeline. When in use, dry gas is introduced into the sealing tube through the docking pipe, and the dry gas passes through the air outlet of the movable disk and enters the upper side of the valve disk. The dry gas is poured into the through groove inside the valve disk, and the sealing disk is opened by high-pressure squeezing, so that the sealing disk is lowered through the telescopic rod, and the dry gas is discharged from the flange part of the lower end of the device. When the air pressure is reduced, the sealing disk is reset by a spring, and the sealing disk closes the bottom of the through groove to achieve preliminary sealing. Then the two screws are manually rotated, and the screw threads descend to drive the movable disk to descend. The middle part of the movable disk is connected to the upper end of the telescopic rod through a piston cylinder. After the movable disk descends, the pressure cover on the lower side fits the arc-shaped opening on the upper end of the through groove to achieve secondary sealing. When disassembling and maintenance, the top cover is threadedly rotated to separate it from the connecting pipe, and then the top cover is vertically lifted to separate the assembly structure on the lower side.

[0007] Preferably, the upper opening of the through slot is designed in a funnel shape, and the upper opening of the through slot is adapted to the gland. The gland is connected to the upper end of the through slot to achieve passage closure, and the funnel shape design improves the fit.

[0008] Preferably, the gland is made of rubber material, and the gland is staggered with the air outlet, so that the sealing performance of the gland is enhanced.

[0009] Preferably, the sealing disc is located at the lower side of the valve disc, and the telescopic rod is fixed on the sealing disc after passing through the through slot, and the sealing disc is adapted to the through slot. The lifting and lowering of the sealing disc is limited by the telescopic rod, and the sealing disc is fitted to the through slot opening after the spring is reset to close the passage.

[0010] Preferably, screw rods are rotatably mounted on both sides of the sealing tube, and the threads at the lower ends of the screw rods penetrate the two sides of the movable disk. The movable disk can be raised or lowered by rotating the threads of the screw rods.

[0011] Preferably, a piston cylinder is installed through the middle of the movable disk, and the piston cylinder is slidably sleeved on the upper end of the telescopic rod. The movable disk is lifted and lowered on the outer side of the telescopic rod by the piston cylinder, while preventing dry gas from passing through the interface.

[0012] Preferably, the movable disk is adapted to the size of the butt joint pipe, so that the movable disk is adapted to the size of the butt joint pipe, so that the disassembly and separation are convenient.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the device is connected to an external exhaust device through a flange, and the butt joint is connected to the exhaust pipe port of the storage device through a pipeline. When in use, dry gas is introduced into the sealing tube through the butt joint, and the dry gas passes through the air outlet of the movable disk and enters the upper side of the valve disc. The dry gas is poured into the through groove inside the valve disc, and the sealing disc is opened by high pressure squeezing, so that the sealing disc descends through the telescopic rod, and the dry gas is discharged from the flange part of the lower end of the device. When the air pressure is reduced, the sealing disc is reset by a spring, and the sealing disc seals the bottom of the through groove to achieve preliminary sealing. Then the two screws are manually rotated, and the screw threads descend to drive the movable disk to descend. The middle part of the movable disk is connected to the upper end of the telescopic rod through a piston cylinder. After the movable disk descends, the pressure cover on the lower side fits the arc-shaped opening at the upper end of the through groove to achieve secondary sealing. When disassembling and maintenance, the top cover is threadedly rotated to separate it from the connecting pipe, and then the top cover is vertically lifted to separate the assembly structure on the lower side. The device is easy to operate, and the safety of dry gas discharge is ensured by the built-in double sealing mechanism. At the same time, the split mechanism is convenient for maintenance after disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the sealing tube of the utility model;

[0016] Figure 3 This is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the top cover structure of the utility model when viewed from above;

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of the top cover of the utility model.

[0019] In the figure: 1. top cover; 2. sealing tube; 3. flange; 4. screw; 5. butt joint; 6. movable plate; 7. valve plate; 8. connecting pipe; 9. fixing frame; 10. through groove; 11. sealing plate; 12. pressure cover; 13. spring; 14. air outlet; 15. telescopic rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] See also Figures 1 to 5 The utility model provides an embodiment: a dry gas sealing device, including a top cover 1, a sealing tube 2, a movable disk 6 and a sealing disk 11, a flange 3 is fixed to the outer side of the lower end opening of the sealing tube 2, a valve disk 7 is fixed to the lower end of the sealing tube 2, and a through groove 10 is opened in the middle of the valve disk 7, and a connecting pipe 8 is fixed to the upper end opening of the sealing tube 2.

[0023] Furthermore,

[0024] The upper opening of the through slot 10 is designed in a funnel shape, and the upper opening of the through slot 10 is adapted to the pressure cover 12. The pressure cover 12 is connected to the upper end of the through slot 10 to achieve passage closure, and the funnel-shaped design improves the fit.

[0025] Furthermore,

[0026] The gland 12 is made of rubber material, and the gland 12 and the air outlet 14 are staggered, so that the sealing performance of the gland 12 is enhanced by the rubber material.

[0027] Furthermore,

[0028] The sealing disc 11 is located at the lower side of the valve disc 7, and the telescopic rod 15 is fixed on the sealing disc 11 after passing through the through groove 10. The sealing disc 11 is adapted to the through groove 10, and the lifting and lowering of the sealing disc 11 is limited by the telescopic rod 15. After the sealing disc 11 is reset by the spring 13, it fits into the opening of the through groove 10 to achieve passage closure.

[0029] Embodiment 2

[0030] See also Figures 1 to 5 The utility model provides an embodiment: a dry gas sealing device, comprising a top cover 1, a sealing tube 2, a movable disk 6 and a sealing disk 11, the top cover 1 is threadedly installed on the upper end of the connecting tube 8, a docking tube 5 is installed through the middle of the top cover 1, a fixing frame 9 is fixed to the inner lower end of the docking tube 5, a telescopic rod 15 is fixed to the lower end surface of the fixing frame 9, and the lower end of the telescopic rod 15 is fixed to the sealing disk 11, a spring 13 is sleeved and fixed to the lower end of the telescopic rod 15, and the lower end of the spring 13 is fixed to the sealing disk 11, the movable disk 6 is located at the inner upper end of the sealing tube 2, an air outlet 14 is opened in an outer annular array of the movable disk 6, a pressure cover 12 is fixed to the lower end surface of the movable disk 6, and the pressure cover 12 corresponds to the upper end of the through groove 10.

[0031] Furthermore,

[0032] Screw rods 4 are rotatably mounted on both sides of the sealing tube 2 , and the threads of the lower ends of the screw rods 4 penetrate through both sides of the movable disk 6 , and the movable disk 6 is raised and lowered by rotating the threads of the screw rods 4 .

[0033] Furthermore,

[0034] A piston cylinder is installed through the middle of the movable disk 6, and the piston cylinder is slidably sleeved on the upper end of the telescopic rod 15, so that the movable disk 6 can be raised and lowered on the outside of the telescopic rod 15 through the piston cylinder, while preventing dry gas from passing through the interface.

[0035] Furthermore,

[0036] The movable plate 6 is matched with the butt joint pipe 5 in size, and the movable plate 6 is matched with the butt joint pipe 5 in size, so that the disassembly and separation are facilitated.

[0037] When the utility model is working, the device is connected to the external exhaust device through the flange 3, and the docking pipe 5 is connected to the exhaust pipe port of the storage device through a pipeline. When in use, dry gas is introduced into the sealing tube 2 through the docking pipe 5, and the dry gas enters the upper side of the valve disc 7 through the air outlet 14 of the movable disk 6. The dry gas is poured into the through groove 10 inside the valve disc 7, and the sealing disk 11 is opened by high pressure squeezing, so that the sealing disk 11 descends through the telescopic rod 15, and the dry gas is discharged from the flange 3 at the lower end of the device. When the air pressure is reduced, the sealing disk 11 is reset by the spring 13, and the sealing disk 11 closes the bottom of the through groove 10 to achieve preliminary sealing, and then the two screws 4 are manually rotated, and the screw 4 threadedly descends to drive the movable disk 6 to descend. The middle part of the movable disk 6 is connected to the upper end of the telescopic rod 15 through the piston cylinder. After the movable disk 6 descends, the pressure cover 12 on the lower side is fitted with the arc-shaped opening at the upper end of the through groove 10 to achieve secondary sealing. When disassembling and maintenance, the top cover 1 is threadedly rotated to separate it from the connecting pipe 8, and then the top cover 1 is vertically lifted to separate the assembly structure on the lower side.

[0038] 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 dry gas sealing device, comprising a top cover (1), a sealing tube (2), a movable disk (6) and a sealing disk (11), characterized in that: A flange (3) is fixed to the outer side of the lower opening of the sealing tube (2), a valve disc (7) is fixed to the inner lower end of the sealing tube (2), and a through groove (10) is provided in the middle of the valve disc (7), a connecting tube (8) is fixed to the upper opening of the sealing tube (2), the top cover (1) is threadedly mounted on the upper end of the connecting tube (8), a butt joint (5) is installed through the middle of the top cover (1), a fixing frame (9) is fixed to the inner lower end of the butt joint (5), and the fixing frame (9) is A telescopic rod (15) is fixed to the lower end surface, and the lower end of the telescopic rod (15) is fixed to the sealing disk (11); a spring (13) is sleeved and fixed to the lower end of the telescopic rod (15), and the lower end of the spring (13) is fixed to the sealing disk (11); the movable disk (6) is located at the upper end of the sealing tube (2); an air outlet (14) is provided in an annular array on the outer side of the movable disk (6); a pressure cover (12) is fixed to the lower end surface of the movable disk (6), and the pressure cover (12) corresponds to the upper end of the through groove (10).

2. A dry gas sealing device according to claim 1, characterized in that: The upper opening of the through groove (10) is designed to be funnel-shaped, and the upper opening of the through groove (10) is compatible with the pressure cover (12).

3. A dry gas sealing device according to claim 1, characterized in that: The pressure cover (12) is made of rubber material, and the pressure cover (12) and the air outlet (14) are staggered.

4. A dry gas sealing device according to claim 1, characterized in that: The sealing disc (11) is located at the lower side of the valve disc (7), and the telescopic rod (15) is fixed on the sealing disc (11) after passing through the through groove (10), and the sealing disc (11) is adapted to the through groove (10).

5. A dry gas sealing device according to claim 1, characterized in that: Screw rods (4) are rotatably mounted on both sides of the sealing tube (2), and the threads at the lower ends of the screw rods (4) penetrate through both sides of the movable disk (6).

6. A dry gas sealing device according to claim 1, characterized in that: A piston cylinder is installed through the middle of the movable plate (6), and the piston cylinder is slidably sleeved on the upper end of the telescopic rod (15).

7. A dry gas sealing device according to claim 1, characterized in that: The movable plate (6) is adapted in size to the butt joint pipe (5).

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