A two-way pressure relief valve disc for a PV valve

Abstract

The present invention relates to the field of PV valves, and discloses a two-way pressure relief valve disc for a PV valve, including a valve body. A sealing ring is arranged inside the valve body. A pressure valve disc is arranged at the upper end of the sealing ring. Pressure valve disc limit plates are arranged on both sides of the inner surface of the valve body close to the pressure valve disc. A pressure spring is arranged on the inner surface of the pressure valve disc limit plate. A pressure valve disc guide seat is arranged on the outer surface of the upper end of one side of the pressure valve disc close to the pressure spring. A negative pressure valve disc seal is arranged at the lower end of the pressure valve disc. A negative pressure valve disc guide seat is arranged on the outer surface of the lower end of one side of the negative pressure valve disc seal. The two-way pressure relief valve disc for the PV valve has the advantages of simple structure and stable operation, can achieve automatic pressure relief, and can also achieve automatic pressure boost, bringing a better application prospect.

Description

Technical Field

[0001] The present invention relates to the field of PV valves, and particularly to a two-way pressure relief valve disc for a PV valve. Background Art

[0002] The PV valve, also known as a high-speed discharge pressure / vacuum valve, is a gravity-type automatic pressure control venting device that combines a vacuum valve, a pressure valve, and a high-speed discharge device. Its function is mainly to achieve pressure balance in the ballast tank, and its sealing performance determines the safe operation of the ship. Since the PV valve needs to be opened frequently, its sealing performance is likely to deteriorate. Therefore, we propose a two-way pressure relief valve disc for a PV valve. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the present invention provides a two-way pressure relief valve disc for a PV valve, which has the advantages of simple structure, stable operation, automatic pressure relief, and automatic pressure boosting.

[0005] (2) Technical Solutions

[0006] To achieve the above object of having a simple structure, stable operation, automatic pressure relief, and automatic pressure boosting, the present invention provides the following technical solution: A two-way pressure relief valve disc for a PV valve, including a valve body, a sealing ring is arranged inside the valve body, a pressure valve disc is arranged above the sealing ring, pressure valve disc limit plates are arranged on both sides of the inner surface of the valve body close to the pressure valve disc, a pressure spring is arranged on the inner surface of the pressure valve disc limit plates, a pressure valve disc guide seat is arranged on the outer surface of the upper end of the pressure valve disc close to the pressure spring, a negative pressure valve disc seal is arranged at the lower end of the pressure valve disc, and a negative pressure valve disc guide seat is arranged on the outer surface of the lower end of one side of the negative pressure valve disc seal.

[0007] Preferably, the sealing ring is fixedly embedded in the inner surface of the valve body, the sealing ring is annular, the lower end surface of the pressure valve disc guide seat is fixedly connected to the upper end surface of the pressure valve disc, and the pressure valve disc guide seat is Z-shaped.

[0008] Preferably, the pressure valve disc limit plates are fixedly connected to the valve body, the pressure valve disc limit plates are Z-shaped, the number of the pressure valve disc limit plates is two groups and they are symmetrically distributed, the pressure valve disc limit plate closer to the pressure spring is higher than the other pressure valve disc limit plate, and one end of the pressure spring is fixedly connected to the inner surface of the pressure valve disc limit plate.

[0009] Preferably, a negative pressure valve disc is provided between the negative pressure valve disc seal and the pressure valve disc. The negative pressure valve disc is fixedly connected to the upper surface of the negative pressure valve disc seal. The negative pressure valve disc seal and the negative pressure valve disc are concentrically arranged and have matching shapes. A through hole is provided at the center of the pressure valve disc, and the cross-sectional area of the through hole is smaller than that of the negative pressure valve disc.

[0010] Preferably, a pull rod is provided at the upper end of the negative pressure valve disc seal. A hexagonal nut and a gasket are provided on the surface of the pull rod. The pull rod passes through the negative pressure valve disc and extends to the inside of the negative pressure valve disc seal. The gasket is connected to the surface of the pull rod and is in close contact with the upper surface of the negative pressure valve disc seal. The hexagonal nut is movably connected to the surface of the pull rod by threads and is located above the gasket.

[0011] Preferably, negative pressure valve disc limit plates are provided on both sides of the lower outer surface of the pressure valve disc close to the negative pressure valve disc seal. The negative pressure valve disc limit plates are Z-shaped. The negative pressure valve disc limit plates are fixedly connected to the pressure valve disc. The number of the negative pressure valve disc limit plates is two groups and they are symmetrically distributed.

[0012] Preferably, a negative pressure valve disc spring is provided on the inner surface of the negative pressure valve disc limit plate on the side of the pressure spring. One end of the negative pressure valve disc spring is fixedly connected to the inner surface of the negative pressure valve disc limit plate. The negative pressure valve disc limit plate on the side close to the negative pressure valve disc spring is higher than the negative pressure valve disc limit plate on the other side.

[0013] Preferably, a negative pressure valve disc guide seat is provided on the lower outer surface of the negative pressure valve disc seal. The upper outer surface of the negative pressure valve disc guide seat is fixedly connected to the lower outer surface of the negative pressure valve disc seal.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides a PV valve two-way pressure relief valve disc, which has the following beneficial effects:

[0016] 1. For this PV valve two-way pressure relief valve disc, through the cooperation of the pressure valve disc, the pressure spring and the pressure valve disc limit plate, under natural conditions, the pressure valve disc presses on the sealing ring under the action of the pressure spring. When the air pressure in the ballast tank is too high, the pressure acting on the pressure valve disc increases. At this time, the pressure valve disc moves upward to compress the pressure spring, so that the pressure valve disc drives the pressure valve disc guide seat to move upward along the inside of the pressure valve disc limit plate, discharging the gas in the ballast tank to complete pressure relief, without manual operation and can automatically relieve pressure.

[0017] 2. The two-way pressure relief valve disc of this PV valve, through the cooperation of the negative pressure valve disc, negative pressure spring and negative pressure valve disc limit plate. Under natural conditions, the negative pressure valve disc presses on the negative pressure valve disc seal under the action of the negative pressure valve disc spring. When the air pressure in the ballast tank is too low, under the action of the external atmospheric pressure, the negative pressure valve disc moves downward to squeeze the negative pressure valve disc spring, causing the negative pressure valve disc to drive the negative pressure valve disc guide seat at the lower end to move downward along the inner side of the negative pressure valve disc limit plate, thereby forming a gap, allowing external gas to enter the ballast tank to increase the air pressure in the tank, completing the pressurization. The operation is simple and automatic pressurization can be achieved.

[0018] 3. The two-way pressure relief valve disc of this PV valve has a simple structure and stable operation, and has better application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] In the figure: 1. Valve body; 2. Pressure valve disc; 3. Pressure valve disc guide seat; 4. Pressure spring; 5. Sealing ring; 6. Negative pressure valve disc limit plate; 7. Pressure valve disc limit plate; 8. Hexagonal nut; 9. Gasket; 10. Negative pressure valve disc seal; 11. Negative pressure valve disc; 12. Negative pressure valve disc spring; 13. Negative pressure valve disc guide seat; 14. Tie rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figure 1 , a two-way pressure relief valve disc of a PV valve, including a valve body 1. A sealing ring 5 is arranged inside the valve body 1. A pressure valve disc 2 is arranged at the upper end of the sealing ring 5. Pressure valve disc limit plates 7 are arranged on both sides of the inner surface of the valve body 1 close to the pressure valve disc 2. A pressure spring 4 is arranged on the inner surface of the pressure valve disc limit plate 7. A pressure valve disc guide seat 3 is arranged on the outer surface of the upper end of one side of the pressure valve disc 2 close to the pressure spring 4. A negative pressure valve disc seal 10 is arranged at the lower end of the pressure valve disc 2. The negative pressure valve disc seal 10 can increase the sealing performance between the pressure valve disc 2 and the negative pressure valve disc 11. A negative pressure valve disc guide seat 13 is arranged on the outer surface of the lower end of one side of the negative pressure valve disc seal 10.

[0023] The sealing ring 5 is fixedly embedded in the inner surface of the valve body 1. The sealing ring 5 is annular. The sealing ring 5 can increase the tightness between the pressure valve disc 2 and the valve body 1. The lower end surface of the pressure valve disc guide seat 3 is fixedly connected to the upper end surface of the pressure valve disc 2. The pressure valve disc guide seat 3 is Z-shaped.

[0024] The pressure valve disc limiting plate 7 is fixedly connected to the valve body 1. The pressure valve disc limiting plate 7 is Z-shaped. The number of the pressure valve disc limiting plates 7 is two groups and they are symmetrically distributed. The pressure valve disc limiting plate 7 can prevent the pressure valve disc 2 from detaching from the valve body 1. The pressure valve disc limiting plate 7 on the side close to the pressure spring 4 is higher than the other pressure valve disc limiting plate 7. One end of the pressure spring 4 is fixedly connected to the inner surface of the pressure valve disc limiting plate 7. The pressure spring 4 can ensure the tightness of the pressure valve disc 2 in the natural state.

[0025] A negative pressure valve disc 11 is arranged between the negative pressure valve disc seal 10 and the pressure valve disc 2. The negative pressure valve disc 11 is fixedly connected to the upper end surface of the negative pressure valve disc seal 10. The negative pressure valve disc seal 10 and the negative pressure valve disc 11 are concentrically arranged and their shapes match. The negative pressure valve disc seal 10 can increase the tightness between the pressure valve disc 2 and the negative pressure valve disc 11. A through hole is opened in the center of the pressure valve disc 2. The through hole is beneficial to pressure increase and the cross-section of the through hole is smaller than the cross-section of the negative pressure valve disc 11.

[0026] A pull rod 14 is arranged at the upper end of the negative pressure valve disc seal 10. A hexagonal nut 8 and a gasket 9 are arranged on the surface of the pull rod 14. The gasket 9 can increase the connection stability between the pull rod 14 and the negative pressure valve disc 11. The pull rod 14 penetrates through the negative pressure valve disc 11 and extends to the inside of the negative pressure valve disc seal 10. The gasket 9 is connected to the surface of the pull rod 14 and is close to the upper surface of the negative pressure valve disc seal 10. The hexagonal nut 8 is movably connected to the surface of the pull rod 14 by threads and is located above the gasket 9.

[0027] Negative pressure valve disc limiting plates 6 are arranged on both sides of the lower end outer surface of the pressure valve disc 2 close to the negative pressure valve disc seal 10. The negative pressure valve disc limiting plates 6 are Z-shaped. The negative pressure valve disc limiting plates 6 are fixedly connected to the pressure valve disc 2. The number of the negative pressure valve disc limiting plates 6 is two groups and they are symmetrically distributed.

[0028] A negative pressure valve disc spring 12 is arranged on the inner surface of the negative pressure valve disc limiting plate 6 on the side relative to the pressure spring 4. The negative pressure valve disc spring 12 can ensure the tightness of the negative pressure valve disc 11 in the natural state. One end of the negative pressure valve disc spring 12 is fixedly connected to the inner surface of the negative pressure valve disc limiting plate 6. The negative pressure valve disc limiting plate 6 on the side close to the negative pressure valve disc spring 12 is higher than the other negative pressure valve disc limiting plate 6.

[0029] The outer surface of the lower end of the negative pressure valve disc seal 10 is provided with a negative pressure valve disc guide seat 13, and the outer surface of the upper end of the negative pressure valve disc guide seat 13 is fixedly connected to the outer surface of the lower end of the negative pressure valve disc seal 10.

[0030] During operation, the user installs the valve body 1 on the ballast tank of the ship, and the lowermost opening communicates with the inner cavity of the ballast tank. Under natural conditions, the pressure valve disc 2 is pressed against the sealing ring 5 under the action of the pressure spring 4, and the negative pressure valve disc 11 is pressed against the negative pressure valve disc seal 10 under the action of the negative pressure valve disc spring 12. When the air pressure in the ballast tank is too high, the pressure acting on the pressure valve disc 2 increases. At this time, the pressure valve disc 2 moves upward to compress the pressure spring 4, causing the pressure valve disc 2 to drive the pressure valve disc guide seat 3 to move upward along the inner side of the pressure valve disc limit plate 7, discharging the gas in the ballast tank to complete pressure relief. When the air pressure in the ballast tank is too low, the process is just the opposite of the outward pressure relief process. Under the action of the external atmospheric pressure, the negative pressure valve disc 11 moves downward to compress the negative pressure valve disc spring 12, causing the negative pressure valve disc 11 to drive the lower negative pressure valve disc guide seat 13 to move downward along the inner side of the negative pressure valve disc limit plate 6, thereby forming a gap to allow external gas to enter the ballast tank to increase the air pressure in the tank and complete pressure increase.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-way pressure relief valve disc for a PV valve, comprising a valve body (1), characterized in that: a sealing ring (5) is arranged inside the valve body (1), a pressure valve disc (2) is arranged above the sealing ring (5), pressure valve disc limit plates (7) are arranged on both sides of the inner surface of the valve body (1) close to the pressure valve disc (2), a pressure spring (4) is arranged on the inner surface of the pressure valve disc limit plate (7), a pressure valve disc guide seat (3) is arranged on the outer surface of the upper end of the pressure valve disc (2) close to the pressure spring (4), a negative pressure valve disc seal (10) is arranged at the lower end of the pressure valve disc (2), and a negative pressure valve disc guide seat (13) is arranged on the outer surface of the lower end of one side of the negative pressure valve disc seal (10), and the upper outer surface of the negative pressure valve disc guide seat (13) is fixedly connected to the lower outer surface of the negative pressure valve disc seal (10); the sealing ring (5) is fixedly embedded in the inner surface of the valve body (1), the sealing ring (5) is annular, the lower surface of the pressure valve disc guide seat (3) is fixedly connected to the upper surface of the pressure valve disc (2), and the pressure valve disc guide seat (3) is Z-shaped; the pressure valve disc limit plate (7) is fixedly connected to the valve body (1), the pressure valve disc limit plate (7) is Z-shaped, the number of the pressure valve disc limit plates (7) is two groups and they are symmetrically distributed, the pressure valve disc limit plate (7) on the side close to the pressure spring (4) is higher than the pressure valve disc limit plate (7) on the other side, and one end of the pressure spring (4) is fixedly connected to the inner surface of the pressure valve disc limit plate (7); a negative pressure valve disc (11) is arranged between the negative pressure valve disc seal (10) and the pressure valve disc (2), the negative pressure valve disc (11) is fixedly connected to the upper surface of the negative pressure valve disc seal (10), the negative pressure valve disc seal (10) and the negative pressure valve disc (11) are concentrically arranged and have matching shapes, a through hole is formed in the center of the pressure valve disc (2), and the cross section of the through hole is smaller than the cross section of the negative pressure valve disc (11); a pull rod (14) is arranged above the negative pressure valve disc seal (10), a hexagonal nut (8) and a gasket (9) are arranged on the surface of the pull rod (14), the pull rod (14) penetrates through the negative pressure valve disc (11) and extends to the inside of the negative pressure valve disc seal (10), the gasket (9) is connected to the surface of the pull rod (14) and is close to the upper surface of the negative pressure valve disc seal (10), and the hexagonal nut (8) is movably connected to the surface of the pull rod (14) by threads and is located above the gasket (9); negative pressure valve disc limit plates (6) are arranged on both sides of the lower outer surface of the pressure valve disc (2) close to the negative pressure valve disc seal (10), the negative pressure valve disc limit plates (6) are Z-shaped, the negative pressure valve disc limit plates (6) are fixedly connected to the pressure valve disc (2), and the number of the negative pressure valve disc limit plates (6) is two groups and they are symmetrically distributed.

2. The two-way pressure relief valve disc for a PV valve according to claim 1, characterized in that: On the inner surface of the negative pressure valve disc limiting plate (6) on the other side opposite to the side where the pressure spring (4) is located, there is a negative pressure valve disc spring (12). One end of the negative pressure valve disc spring (12) is fixedly connected to the inner surface of the negative pressure valve disc limiting plate (6). The negative pressure valve disc limiting plate (6) on the side close to the negative pressure valve disc spring (12) is higher than the negative pressure valve disc limiting plate (6) on the other side.

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