An emergency relief valve for atmospheric pressure storage tank

Abstract

The utility model relates to an emergency relief valve for atmospheric pressure storage tanks, which belongs to the technical field of emergency relief valves, and includes a valve seat, a valve cover, a lever, and a pressure block. A sealing adjustment mechanism is arranged inside the valve seat, and a fixing assembly for installing the pressure block is arranged on the top of the lever. The sealing adjustment mechanism includes a rotating seat fixedly connected to the top of the valve cover and rotatably connected to the lever. In the emergency relief valve for atmospheric pressure storage tanks, the pressure block can use the lever principle to rotate the valve cover downward, so as to facilitate the insertion of the positioning plug into the positioning frame, and the sealing gasket can close the gap between the positioning plug and the positioning frame while achieving a buffering effect, and at the same time make the bottom of the inner sealing ring and the outer sealing ring fit the positioning frame, so as to maintain a good sealing effect. When the sealing effect weakens, the sealing performance of the emergency relief valve can be restored by replacing the inner sealing ring, the outer sealing ring and the positioning frame, thereby effectively improving the practicality of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency relief valves, in particular to an emergency relief valve for a normal pressure storage tank. Background Art

[0002] The emergency relief valve can perform emergency pressure relief and vacuum pressure relief. In an emergency situation (when the outside of the tank is exposed to fire), the ordinary exhaust device may have too small a discharge volume to prevent the tank from being over-pressurized due to an emergency. The emergency relief valve has the necessary pressure relief and vacuum relief devices to keep the tank within a safe working range.

[0003] Under normal circumstances, the valve disc is sealed on the upper end of the valve body by its own gravity and atmospheric pressure, and is sealed by a sealing ring, but it is not convenient to replace the sealing ring. After long-term use, the sealing ring is prone to wear and tear, causing air leakage, etc. In view of this, the present application proposes an emergency relief valve for atmospheric pressure storage tanks. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an emergency relief valve for atmospheric pressure storage tanks, which has the advantages of not only being able to maintain a good sealing effect, but also being able to replace the inner sealing ring, the outer sealing ring and the positioning frame after being used for a period of time, thereby restoring the sealing performance of the emergency relief valve and effectively improving the practicality of the device, and solves the problem that under normal circumstances the valve disc is sealed on the upper end of the valve body by its own gravity and atmospheric pressure, and is sealed by the sealing ring, but it is not convenient to replace the sealing ring, and after long-term use, the sealing ring is prone to wear, causing leakage and the like.

[0005] To achieve the above object, the utility model provides the following technical solutions: an emergency relief valve for a normal pressure storage tank, comprising a valve seat, a valve cover, a lever, and a pressure block, wherein a sealing adjustment mechanism is provided inside the valve seat, and a fixing assembly for installing the pressure block is provided on the top of the lever;

[0006] The sealing adjustment mechanism comprises a rotating seat fixedly connected to the top of the valve cover and rotatably connected to the lever, the bottom of the lever is fixedly connected to a connecting block rotatably connected to the valve seat, the bottom of the valve cover is fixedly connected to a positioning plug, and the inner and outer sides of the positioning plug are respectively installed with an inner sealing ring and an outer sealing ring;

[0007] The valve seat is detachably connected with a positioning frame inside, the inner side of the positioning frame is fixedly connected with a sealing gasket slidably matched with the positioning plug, and the top of the positioning frame is fixedly connected with a pressure plate.

[0008] Furthermore, two connecting plates are fixedly connected to the left side of the valve seat, a rotating rod is fixedly connected to the opposite side of the two connecting plates, and a rotating hole corresponding to the position of the rotating rod is opened inside the connecting block.

[0009] Furthermore, a guide plate is fixedly connected to the right side of the valve seat, two fixing plates are fixedly connected to the right side of the valve cover, and a sliding rod slidably connected to the guide plate is fixedly connected to the opposite side of the two fixing plates.

[0010] Furthermore, the fixing plate is L-shaped, and a guide groove coaxially arranged with the rotating rod is provided inside the guide plate.

[0011] Furthermore, both inner and outer sides of the positioning plug are fixedly connected with screws, and the screws penetrate the inner sealing ring and the outer sealing ring, and the outer side of the screw is threadedly connected with a fastening nut.

[0012] Furthermore, a mounting groove slidably matched with the positioning frame is provided inside the valve seat, and a fastening bolt penetrating the positioning frame is connected to the internal thread of the valve seat.

[0013] Furthermore, the positioning plug and the positioning frame are both annular, and the bottom of the positioning plug is a slope structure with a left bottom and a right high.

[0014] Furthermore, the fixing assembly includes a positioning stud fixedly connected to the top of the lever, a positioning hole corresponding to the position of the positioning stud is opened inside the pressing block, and the outer side of the positioning stud is threadedly connected to a limiting nut.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The emergency relief valve for atmospheric pressure storage tanks has a pressure block that can use the lever principle to rotate the valve cover downward, so that the positioning plug can be inserted into the positioning frame. The sealing gasket can close the gap between the positioning plug and the positioning frame while achieving a buffering effect. At the same time, the bottom of the inner sealing ring and the outer sealing ring fits the positioning frame to maintain a good sealing effect. When the sealing effect weakens, the inner sealing ring, the outer sealing ring and the positioning frame can be replaced to restore the sealing performance of the emergency relief valve, effectively improving the practicability of the device.

[0017] 2. The emergency relief valve for atmospheric pressure storage tanks can facilitate the disassembly and assembly of the pressure block by removing the limit nut, thereby facilitating the replacement of the pressure block as needed, thereby enabling the emergency relief valve to meet the use requirements in different situations, thereby effectively improving the applicability and practical effect of the emergency relief valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0019] Figure 2 This is a cross-sectional view of the sealing structure of the valve seat and the valve cover of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the valve cover of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the guide plate of the utility model.

[0022] In the figure: 1. valve seat; 2. valve cover; 3. connecting plate; 4. connecting block; 5. rotating rod; 6. rotating seat; 7. lever; 8. positioning stud; 9. pressure block; 10. limiting nut; 11. guide plate; 12. fixing plate; 13. sliding rod; 14. positioning plug; 15. screw; 16. outer sealing ring; 17. inner sealing ring; 18. fastening nut; 19. positioning frame; 20. fastening bolt; 21. pressure plate; 22. sealing gasket. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-4 In this embodiment, an emergency relief valve for a normal pressure storage tank includes a valve seat 1, a valve cover 2, a lever 7, and a pressure block 9. A sealing adjustment mechanism is provided inside the valve seat 1, and a fixing component for installing the pressure block 9 is provided on the top of the lever 7.

[0025] Embodiment 1: The sealing adjustment mechanism includes a rotating seat 6 fixedly connected to the top of the valve cover 2 and rotatably connected to the lever 7, the bottom of the lever 7 is fixedly connected to a connecting block 4 rotatably connected to the valve seat 1, the left side of the valve seat 1 is fixedly connected to two connecting plates 3, and the opposite sides of the two connecting plates 3 are fixedly connected to a rotating rod 5, and a rotating hole corresponding to the position of the rotating rod 5 is opened inside the connecting block 4, so that the rotating rod 5 can pass through the connecting block 4 through the rotating hole, so that the lever 7 drives the valve cover 2 to rotate around the axis of the rotating rod 5.

[0026] Among them, a guide plate 11 is fixedly connected to the right side of the valve seat 1, and two fixed plates 12 are fixedly connected to the right side of the valve cover 2. A sliding rod 13 slidably connected to the guide plate 11 is fixedly connected on the opposite side of the two fixed plates 12. The fixed plate 12 is L-shaped, and a guide groove coaxially arranged with the rotating rod 5 is provided inside the guide plate 11, so as to facilitate the sliding stability of the valve cover 2 by sliding the sliding rod 13 in the guide plate 11.

[0027] In this embodiment, a positioning plug 14 is fixedly connected to the bottom of the valve cover 2, and an inner sealing ring 17 and an outer sealing ring 16 are respectively installed on the inner and outer sides of the positioning plug 14; a screw 15 is fixedly connected to the inner and outer sides of the positioning plug 14, and the screw 15 passes through the inner and outer sealing rings 17 and the outer sealing rings 16, and the outer side of the screw 15 is threadedly connected to a fastening nut 18, so that the inner and outer sealing rings 17 and the outer sealing rings 16 can be fixed to the inner and outer sides of the positioning plug 14 by tightening the fastening nut 18.

[0028] Among them, the interior of the valve seat 1 is detachably connected to a positioning frame 19, and the interior of the valve seat 1 is provided with an installation groove that is slidably adapted to the positioning frame 19, so that the positioning frame 19 can be conveniently embedded in the valve seat 1 using the installation groove. The internal thread connection of the valve seat 1 is provided with a fastening bolt 20 that penetrates the positioning frame 19, so that the fastening bolt 20 can be used to limit the movement of the positioning frame 19. The positioning block 14 and the positioning frame 19 are both annular, and the bottom of the positioning block 14 is a slope structure with a left bottom and a right high, which is convenient for improving the pressure-bearing capacity of the right side of the valve cover 2.

[0029] Among them, the inner side of the positioning frame 19 is fixedly connected with a sealing gasket 22 that is slidably adapted to the positioning plug 14, so that the cushioning effect of the sealing gasket 22 can be conveniently utilized to reduce the impact of the positioning plug 14 on the positioning frame 19 when the valve cover 2 moves downward. The top of the positioning frame 19 is fixedly connected with a pressure plate 21, so that the set pressure plate 21 can be conveniently utilized to improve the connection stability between the positioning plug 14 and the positioning frame 19.

[0030] It should be noted that, in the emergency relief valve for atmospheric pressure storage tanks, the provided pressure block 9 can drive the lever 7 to press down, so that the valve cover 2 rotates downward, thereby facilitating the insertion of the positioning plug 14 into the positioning frame 19, and the provided sealing gasket 22 can close the gap between the positioning plug 14 and the positioning frame 19 while achieving a buffering effect, and at the same time make the bottom of the inner sealing ring 17 and the outer sealing ring 16 fit the positioning frame 19, so as to maintain a good sealing effect, and when the sealing effect weakens, the sealing performance of the emergency relief valve can be restored by replacing the inner sealing ring 17, the outer sealing ring 16 and the positioning frame 19, thereby effectively improving the practicability of the device.

[0031] Embodiment 2: The fixing assembly includes a positioning stud 8 fixedly connected to the top of the lever 7, a positioning hole corresponding to the position of the positioning stud 8 is opened inside the pressure block 9, and the outer side of the positioning stud 8 is threadedly connected to a limiting nut 10, so that the pressure block 9 is easy to disassemble and assemble.

[0032] It should be noted that the emergency relief valve for atmospheric pressure storage tanks can facilitate the disassembly and assembly of the pressure block 9 by removing the limit nut 10, thereby facilitating the replacement of the pressure block 9 as needed, thereby enabling the emergency relief valve to meet the usage requirements in different situations, thereby effectively improving the applicability and practical effect of the emergency relief valve.

[0033] The working principle of the above embodiment is:

[0034] When the emergency relief valve for atmospheric pressure storage tank is used, the pressure block 9 of different weights can be replaced according to the use occasion of the emergency relief valve. The provided lever 7 can drive the valve cover 2 to rotate around the axis of the rotating rod 5 under the gravity of the pressure block 9, so as to facilitate the positioning plug 14 to move closer to the positioning frame 19. When the positioning plug 14 contacts the positioning frame 19, the provided sealing gasket 22 can reduce the impact of the positioning plug 14 on the positioning frame 19 when the valve cover 2 moves downward, until the positioning plug 14 is completely inserted into the positioning frame 19. At this time, the provided sealing gasket 22 can fill the gap between the positioning plug 14 and the positioning frame 19, and the bottom of the inner sealing ring 17 and the outer sealing ring 16 fits the positioning frame 19, so as to maintain a good sealing effect. When the sealing effect of the emergency relief valve is weakened due to long use time, the inner sealing ring 17, the outer sealing ring 16 and the positioning frame 19 can be replaced to restore the sealing performance of the emergency relief valve, thereby effectively improving the practicality of the device.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] 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. An emergency relief valve for a normal pressure storage tank, comprising a valve seat (1), a valve cover (2), a lever (7), and a pressure block (9), characterized in that: A sealing adjustment mechanism is provided inside the valve seat (1), and a fixing assembly for mounting a pressure block (9) is provided on the top of the lever (7); The sealing adjustment mechanism comprises a rotating seat (6) fixedly connected to the top of the valve cover (2) and rotatably connected to the lever (7); the bottom of the lever (7) is fixedly connected to a connecting block (4) rotatably connected to the valve seat (1); the bottom of the valve cover (2) is fixedly connected to a positioning plug (14); the inner and outer sides of the positioning plug (14) are respectively mounted with an inner sealing ring (17) and an outer sealing ring (16); The valve seat (1) is detachably connected to a positioning frame (19) inside, the inner side of the positioning frame (19) is fixedly connected to a sealing gasket (22) that is slidably matched with the positioning plug (14), and the top of the positioning frame (19) is fixedly connected to a pressure plate (21).

2. The emergency relief valve for atmospheric pressure storage tank according to claim 1, characterized in that: Two connecting plates (3) are fixedly connected to the left side of the valve seat (1), a rotating rod (5) is fixedly connected to the opposite side of the two connecting plates (3), and a rotating hole corresponding to the position of the rotating rod (5) is opened inside the connecting block (4).

3. The emergency relief valve for atmospheric pressure storage tank according to claim 2, characterized in that: The right side of the valve seat (1) is fixedly connected to a guide plate (11), the right side of the valve cover (2) is fixedly connected to two fixing plates (12), and the opposite side of the two fixing plates (12) is fixedly connected to a sliding rod (13) slidably connected to the guide plate (11).

4. The emergency relief valve for atmospheric pressure storage tank according to claim 3, characterized in that: The fixing plate (12) is L-shaped, and a guide slot coaxially arranged with the rotating rod (5) is provided inside the guide plate (11).

5. The emergency relief valve for atmospheric pressure storage tank according to claim 1, characterized in that: The inner and outer sides of the positioning plug (14) are fixedly connected with screw rods (15), and the screw rods (15) penetrate the inner sealing ring (17) and the outer sealing ring (16). The outer side of the screw rod (15) is threadedly connected with a fastening nut (18).

6. The emergency relief valve for atmospheric pressure storage tank according to claim 1, characterized in that: The valve seat (1) is provided with a mounting groove that is slidably matched with the positioning frame (19), and the valve seat (1) is internally threadedly connected with a fastening bolt (20) that penetrates the positioning frame (19).

7. The emergency relief valve for atmospheric pressure storage tank according to claim 1, characterized in that: The positioning plug (14) and the positioning frame (19) are both annular, and the bottom of the positioning plug (14) is a slope structure with a left bottom and a right high.

8. The emergency relief valve for atmospheric pressure storage tank according to claim 1, characterized in that: The fixing assembly comprises a positioning stud (8) fixedly connected to the top of the lever (7), a positioning hole corresponding to the position of the positioning stud (8) is provided inside the pressing block (9), and the outer side of the positioning stud (8) is threadedly connected to a limiting nut (10).

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