A PV valve for ballast tanks

Abstract

The present invention relates to the technical field of PV valves, and discloses a PV valve for a ballast tank, comprising a vacuum pressure relief rod, a lifting eye screw is arranged on the outside of the vacuum pressure relief rod, a shell is arranged at the lower end of the lifting eye screw, a float is arranged inside the shell, a pressure valve disc guide seat is arranged at the lower end of the float, a pressure spring is arranged between the pressure valve disc guide seat and the float, and a pressure valve disc body is arranged at the lower end of the pressure valve disc guide seat. The PV valve for a ballast tank has the function of being able to conveniently complete pressure relief when the air pressure in the ballast tank is too high and needs to be relieved outwards, and at the same time, being able to conveniently complete pressurization in the ballast tank when the air pressure in the ballast tank is too low and needs to be pressurized inwards, and being able to prevent water from entering the ballast tank when the water pressure in the ballast tank is too high, thereby solving the problem of inconvenience in discharge when the vacuum pressure in the ballast tank needs to be discharged, and can bring better prospects for use.

Description

Technical Field

[0001] The present invention relates to the technical field of PV valves, and in particular to a PV valve for a ballast tank. Background Art

[0002] The PV valve for ballast tanks is a PV valve for ballast tanks; the existing PV valve for ballast tanks has certain disadvantages when used. First, the PV valve for ballast tanks cannot conveniently complete pressure relief when the air pressure in the ballast tank is too high and needs to be relieved outwards. Secondly, it cannot conveniently complete the pressurization of the ballast tank when the air pressure in the ballast tank is too low and needs to be increased inwards. In addition, it cannot prevent water from entering the ballast tank when the water pressure in the ballast tank is too high, which is not practical. Finally, when the vacuum pressure in the ballast tank needs to be discharged, it cannot be discharged conveniently. For this reason, we propose a PV valve for ballast tanks. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In response to the deficiencies of the prior art, the present invention provides a PV valve for a ballast tank, which can conveniently complete pressure relief when the air pressure in the ballast tank is too high and needs to be released outwards. At the same time, it can conveniently complete pressurization in the ballast tank when the air pressure in the ballast tank is too low and needs to be increased inwards. It can also prevent water from entering the ballast tank when the water pressure in the ballast tank is too high, solving the problem of inconvenience in discharging when the vacuum pressure in the ballast tank needs to be discharged.

[0005] (2) Technical solution

[0006] In order to achieve the above-mentioned purpose of being able to conveniently complete pressure relief when the air pressure in the ballast tank is too high and needs to be released outwards, and at the same time being able to conveniently complete the pressurization of the ballast tank when the air pressure in the ballast tank is too low and needs to be increased inwards, and being able to prevent water from entering the ballast tank when the water pressure in the ballast tank is too high, and at the same time achieving the purpose of convenient discharge when the vacuum pressure in the ballast tank needs to be discharged, the present invention provides the following technical solutions: a PV valve for a ballast tank, comprising a vacuum pressure relief rod, a lifting eye screw is provided on the outer side of the vacuum pressure relief rod, a shell is provided at the lower end of the lifting eye screw, a float is provided inside the shell, and a pressure valve is provided at the lower end of the float Disc guide seat, a pressure spring is provided between the pressure valve disc guide seat and the float, the lower end of the pressure valve disc guide seat is provided with a pressure valve disc body, the lower end of the pressure valve disc body is provided with a sealing ring, the outside of the sealing ring is provided with a pressure valve disc seal, the outer surface of the pressure valve disc seal is provided with a filter, the lower end of the filter is provided with a No. 1 hexagon socket screw, the lower end of the No. 1 hexagon socket screw is provided with a No. 2 hexagon socket screw, a negative pressure valve disc limit is provided on one side of the sealing ring, the lower end of the No. 2 hexagon socket screw is provided with a screw plug, the lower end of the screw plug is provided with a base, and the lower end of the vacuum pressure relief rod is provided with a guide rod.

[0007] Preferably, a pressure valve disc limiter is provided on one side of the pressure spring, a hexagonal nut is provided at the lower end of the guide rod, a gasket is provided at the lower end of the hexagonal nut, a negative pressure valve disc body is provided on the outside of the hexagonal nut, a negative pressure valve disc seal is provided at the lower end of the negative pressure valve disc body, a No. 3 hexagonal screw is provided at the lower end of the pressure valve disc limiter, a negative pressure valve disc spring is provided on one side of the negative pressure valve disc seal, and a negative pressure valve disc guide seat is provided between the negative pressure valve disc spring and the negative pressure valve disc seal.

[0008] Preferably, the shell and the vacuum pressure relief rod are movably connected, the lifting eye screw and the shell are fixedly connected, the pressure spring and the float are movably connected, the pressure valve disc body and the pressure valve disc guide seat are movably connected, the sealing ring and the pressure valve disc body are movably connected, and the shell and the float are movably connected.

[0009] Preferably, the pressure valve disc seal and the shell are movably connected, the filter screen and the pressure valve disc seal are movably connected, the No. 1 hexagon socket screw and the pressure valve disc seal are rotationally connected, and the No. 2 hexagon socket screw and the shell are rotationally connected.

[0010] Preferably, the negative pressure valve disc limiter and the pressure valve disc body are movably connected, the screw plug and the shell are movably connected, the base and the shell are fixedly connected, and the guide rod and the vacuum pressure relief rod are movably connected.

[0011] Preferably, the pressure valve disc limiter and the No. 3 hexagon socket screw are rotationally connected, a connecting rod is provided inside the hexagonal nut, and the gasket and the hexagonal nut are movably connected.

[0012] Preferably, the negative pressure valve disc body and the pressure valve disc body are movably connected, the negative pressure valve disc seal and the negative pressure valve disc body are movably connected, and the negative pressure valve disc spring and the pressure valve disc body are movably connected.

[0013] Preferably, the negative pressure valve disc guide seat and the negative pressure valve disc spring are movably connected, and the negative pressure valve disc seal and the negative pressure valve disc guide seat are movably connected.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the present invention provides a PV valve for a ballast tank, which has the following beneficial effects:

[0016] 1. The PV valve used in the ballast tank cooperates with the pressure spring, the pressure valve disc body and the sealing ring. When the air pressure in the ballast tank is too high and needs to be relieved outward, the pressure valve disc will naturally press 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, so that the pressure valve disc moves upward, and the gas in the ballast tank is discharged to complete the pressure relief. The pressure relief effect is good and more convenient.

[0017] 2. The PV valve used in the ballast tank, through the action of the negative pressure valve disc body, the negative pressure valve disc seal and the negative pressure valve disc spring, when the air pressure in the ballast tank is too low and needs to be increased inward, the process is exactly the opposite of the outward pressure relief process. Under normal circumstances, the negative pressure valve disc is naturally pressed 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, the external atmospheric pressure causes the negative pressure valve disc to move downward, and the external gas enters the ballast tank to increase the air pressure in the tank, thereby completing the pressurization process in the PV valve, and the use effect is better.

[0018] 3. The PV valve used in the ballast tank cooperates with the float, the negative pressure valve disc body and the negative pressure valve disc seal. When the PV valve is immersed in water, the float floats up due to the buoyancy, which gives an upward pulling force to the pull rod on the negative pressure valve disc, making the negative pressure valve disc and the negative pressure valve disc seal fit more tightly, preventing water from entering the ballast tank when the water pressure is too high, and achieving a better effect.

[0019] 4. The PV valve used in the ballast tank cooperates with the vacuum pressure relief rod and the negative pressure valve disc body. When the vacuum pressure in the ballast tank needs to be discharged, the user completes it through the vacuum pressure relief rod. When the water depth of the ballast tank needs to be measured on board (measured by pressure), it is necessary to ensure that the tank is pressure-free. At this time, the user presses the vacuum pressure relief rod to hold the pull rod below. The pull rod drives the negative pressure valve disc to open, allowing the ballast tank cavity to communicate with the outside world, ensuring that there is no pressure in the tank, thereby completing the discharge of the vacuum pressure in the ballast tank, thereby forming a pressure-free state, and having a better effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front cross-sectional view of the entire structure of the present invention;

[0021] Figure 2 A top sectional view of a local structure of the present invention;

[0022] Figure 3 It is a partial front cross-sectional view of the sealing ring and filter screen of the structure of the present invention;

[0023] Figure 4 The structure of the present invention Figure 2 A partial enlarged view of .

[0024] In the figure: 1. Vacuum pressure relief rod; 2. Eye screw; 3. Shell; 4. Float; 5. Pressure valve disc guide seat; 6. Pressure spring; 7. Pressure valve disc body; 8. Sealing ring; 9. Pressure valve disc seal; 10. Filter; 11. No. 1 hexagon socket screw; 12. No. 2 hexagon socket screw; 13. Negative pressure valve disc limiter; 14. Plug; 15. Base; 16. Guide rod; 17. Pressure valve disc limiter; 18. Hexagonal nut; 19. Gasket; 20. Negative pressure valve disc body; 21. Negative pressure valve disc seal; 22. No. 3 hexagon socket screw; 23. Negative pressure valve disc spring; 24. Negative pressure valve disc guide seat. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0026] See also Figure 1-4A PV valve for a ballast tank includes a vacuum pressure relief rod 1, a lifting eye screw 2 is provided on the outside of the vacuum pressure relief rod 1, a housing 3 is provided at the lower end of the lifting eye screw 2, a float 4 is provided inside the housing 3, a pressure valve disc guide seat 5 is provided at the lower end of the float 4, a pressure spring 6 is provided between the pressure valve disc guide seat 5 and the float 4, a pressure valve disc body 7 is provided at the lower end of the pressure valve disc guide seat 5, a sealing ring 8 is provided at the lower end of the pressure valve disc body 7, and a pressure valve is provided on the outer side of the sealing ring 8. Disc seal 9, the outer surface of the pressure valve disc seal 9 is provided with a filter screen 10, the lower end of the filter screen 10 is provided with a No. 1 hexagon socket screw 11, the lower end of the No. 1 hexagon socket screw 11 is provided with a No. 2 hexagon socket screw 12, one side of the sealing ring 8 is provided with a negative pressure valve disc limit 13, the lower end of the No. 2 hexagon socket screw 12 is provided with a screw plug 14, the lower end of the screw plug 14 is provided with a base 15, and the lower end of the vacuum pressure relief rod 1 is provided with a guide rod 16, which is beneficial to the layout effect and joint action of some components of the PV valve.

[0027] A pressure valve disc limiter 17 is provided on one side of the pressure spring 6, a hexagonal nut 18 is provided at the lower end of the guide rod 16, a gasket 19 is provided at the lower end of the hexagonal nut 18, a negative pressure valve disc body 20 is provided on the outside of the hexagonal nut 18, a negative pressure valve disc seal 21 is provided at the lower end of the negative pressure valve disc body 20, a No. 3 hexagonal screw 22 is provided at the lower end of the pressure valve disc limiter 17, a negative pressure valve disc spring 23 is provided on one side of the negative pressure valve disc seal 21, and a negative pressure valve disc guide seat 24 is provided between the negative pressure valve disc spring 23 and the negative pressure valve disc seal 21, which is beneficial to the layout effect and joint action of some components of the PV valve.

[0028] There is a movably connected connection between the shell 3 and the vacuum pressure relief rod 1, a fixed connection between the lifting eye screw 2 and the shell 3, a movably connected connection between the pressure spring 6 and the float 4, a movably connected connection between the pressure valve disc body 7 and the pressure valve disc guide seat 5, a movably connected connection between the sealing ring 8 and the pressure valve disc body 7, and a movably connected connection between the shell 3 and the float 4, which is conducive to the assembly between the pressure valve disc body 7 and the pressure valve disc guide seat 5.

[0029] There is a movable connection between the pressure valve disc seal 9 and the housing 3, a movable connection between the filter screen 10 and the pressure valve disc seal 9, a rotational connection between the No. 1 hexagon socket screw 11 and the pressure valve disc seal 9, and a rotational connection between the No. 2 hexagon socket screw 12 and the housing 3, which facilitates the rotational connection between the No. 1 hexagon socket screw 11 and the pressure valve disc seal 9.

[0030] There is a movably connected between the negative pressure valve disc limiter 13 and the pressure valve disc body 7, a movably connected between the screw plug 14 and the shell 3, a fixed connection between the base 15 and the shell 3, and a movably connected between the guide rod 16 and the vacuum pressure relief rod 1, which facilitates the vacuum pressure relief rod 1 to complete the discharge of vacuum pressure.

[0031] The pressure valve disc limiter 17 and the No. 3 hexagon socket screw 22 are rotationally connected, a connecting rod is provided inside the hexagonal nut 18, and the gasket 19 and the hexagonal nut 18 are movably connected. The rotation between the pressure valve disc limiter 17 and the No. 3 hexagon socket screw 22 completes the connection.

[0032] The negative pressure valve disc body 20 and the pressure valve disc body 7 are movably connected, the negative pressure valve disc seal 21 and the negative pressure valve disc body 20 are movably connected, and the negative pressure valve disc spring 23 and the pressure valve disc body 7 are movably connected, which is conducive to the connection of some components of the PV valve.

[0033] The negative pressure valve disc guide seat 24 and the negative pressure valve disc spring 23 are movably connected, and the negative pressure valve disc seal 21 and the negative pressure valve disc guide seat 24 are movably connected, which is conducive to the assembly production between the negative pressure valve disc seal 21 and the negative pressure valve disc guide seat 24.

[0034] During operation, when the air pressure in the ballast tank is too high and needs to be relieved outward, the pressure valve disc naturally presses on the sealing ring 8 under the action of the pressure spring 6. When the air pressure in the ballast tank is too high, the pressure acting on the pressure valve disc increases, so that the pressure valve disc moves upward, and the gas in the ballast tank is discharged to complete the pressure relief, and the pressure relief effect is better and more convenient. On the contrary, when the air pressure in the ballast tank is too low and needs to be pressurized inward, the process is just the opposite of the outward pressure relief. Under normal circumstances, the negative pressure valve disc naturally presses on the negative pressure valve disc seal 21 under the action of the negative pressure valve disc spring 23. When the air pressure in the ballast tank is too low, the external atmospheric pressure causes the negative pressure valve disc to move downward, and the external gas enters the ballast tank to increase the air pressure in the tank, thereby completing the pressurization process in the PV valve, and the use effect is better. When the PV When the valve is immersed in water, the float 4 floats up due to the buoyancy, which gives the pull rod on the negative pressure valve disc an upward pulling force, so that the negative pressure valve disc and the negative pressure valve disc seal 21 fit more tightly, preventing water from entering the ballast tank when the water pressure is too high. At the same time, when the vacuum pressure in the ballast tank needs to be discharged, the user completes it through the vacuum pressure relief rod 1. When the water depth of the ballast tank needs to be measured on board (measured by pressure), it is necessary to ensure that there is no pressure in the tank. At this time, the user presses the vacuum pressure relief rod 1 to support the pull rod below, and the pull rod drives the negative pressure valve disc to open, allowing the inner cavity of the ballast tank to communicate with the outside world, ensuring that there is no pressure in the tank, thereby completing the discharge of the vacuum pressure in the ballast tank, thereby forming a pressure-free state, making the PV valve more convenient to use and more practical.

[0035] In summary, through the cooperation of the pressure spring 6, the pressure valve disc body 7 and the sealing ring 8, when the air pressure in the ballast tank is too high and needs to be relieved outward, the pressure valve disc will naturally cover the sealing ring 8 under the action of the pressure spring 6. When the air pressure in the ballast tank is too large, the pressure acting on the pressure valve disc increases, so that the pressure valve disc moves upward, and the gas in the ballast tank is discharged to complete the pressure relief. Through the action of the negative pressure valve disc body 20, the negative pressure valve disc seal 21 and the negative pressure valve disc spring 23, when the air pressure in the ballast tank is too low and needs to be pressurized inward, the process of outward pressure relief is just the opposite. The negative pressure valve disc naturally covers the negative pressure valve disc seal 21 under the action of the negative pressure valve disc spring 23. When the air pressure in the ballast tank is too low, the action of the external atmospheric pressure causes the negative pressure valve disc to move downward, and the external gas enters the ballast tank to increase the air pressure in the tank, thereby completing the pressurization process in the PV valve, which can conveniently complete the pressure relief and pressurization processes in the ballast tank. In the process, through the cooperation of the float 4, the negative pressure valve disc body 20 and the negative pressure valve disc seal 21, when the PV valve is immersed in water, the float 4 floats up due to the buoyancy, which applies an upward pulling force to the pull rod on the negative pressure valve disc, making the negative pressure valve disc and the negative pressure valve disc seal 21 fit more tightly, preventing water from entering the ballast tank when the water pressure is too high, thereby improving the use effect of the PV valve. Through the cooperation of the vacuum pressure relief rod 1 and the negative pressure valve disc body 20, when the vacuum pressure in the ballast tank needs to be discharged, the user uses the vacuum pressure relief rod 1 to complete it. When the water depth of the ballast tank needs to be measured on board (measured by pressure), it is necessary to ensure that the tank is depressurized. At this time, the user presses the vacuum pressure relief rod 1 to push against the pull rod below, and the pull rod drives the negative pressure valve disc to open, allowing the ballast tank cavity to communicate with the outside world, ensuring that the tank is depressurized, thereby completing the vacuum pressure discharge in the ballast tank more conveniently and with strong practical effect.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A PV valve for a ballast tank, comprising a vacuum pressure relief rod (1), characterized in that: A lifting eye screw (2) is arranged on the outside of the vacuum pressure relief rod (1), a housing (3) is arranged at the lower end of the lifting eye screw (2), a float (4) is arranged inside the housing (3), a pressure valve disc guide seat (5) is arranged at the lower end of the float (4), a pressure valve disc body (7) is arranged at the lower end of the pressure valve disc guide seat (5), a pressure spring (6) is arranged between the pressure valve disc guide seat (5) and the pressure valve disc body (7), a sealing ring (8) is arranged at the lower end of the pressure valve disc body (7), and a sealing ring (8) is arranged on the outside of the sealing ring (8). A pressure valve disc seal (9), wherein a filter screen (10) is arranged on the outer surface of the pressure valve disc seal (9), a No. 1 hexagon socket screw (11) is arranged at the lower end of the filter screen (10), a No. 2 hexagon socket screw (12) is arranged at the lower end of the No. 1 hexagon socket screw (11), a negative pressure valve disc limiter (13) is arranged on one side of the sealing ring (8), a screw plug (14) is arranged at the lower end of the No. 2 hexagon socket screw (12), a base (15) is arranged at the lower end of the screw plug (14), and a guide rod (16) is arranged at the lower end of the vacuum pressure relief rod (1); A pressure valve disc limiter (17) is provided on one side of the pressure spring (6), a hexagonal nut (18) is provided at the lower end of the guide rod (16), a gasket (19) is provided at the lower end of the hexagonal nut (18), a negative pressure valve disc body (20) is provided on the outer side of the hexagonal nut (18), a negative pressure valve disc seal (21) is provided at the upper end of the negative pressure valve disc body (20), a No. 3 hexagon socket screw (22) is provided at the lower end of the pressure valve disc limiter (17), a negative pressure valve disc spring (23) is provided on one side of the negative pressure valve disc seal (21), and a negative pressure valve disc guide seat (24) is provided between the negative pressure valve disc spring (23) and the negative pressure valve disc seal (21); The housing (3) and the vacuum pressure relief rod (1) are movably connected, and the eye screw (2) and the housing (3) are fixedly connected; During operation, when the air pressure in the ballast tank is too high and needs to be released to the outside, the pressure valve disc body (7) naturally presses on the sealing ring (8) under the action of the pressure spring (6). When the air pressure in the ballast tank is too high, the pressure acting on the pressure valve disc body (7) increases, so that the pressure valve disc body (7) moves upward, and the gas in the ballast tank is discharged to complete the pressure relief. When the air pressure in the ballast tank is too low and needs to be increased inward, the process is exactly the opposite of the pressure relief. The negative pressure valve disc body (20) naturally presses on the negative pressure valve disc seal (21) under the action of the negative pressure valve disc spring (23). When the air pressure in the ballast tank is too low, the external atmospheric pressure causes the negative pressure valve disc body (20) to move downward, and the external gas enters the ballast tank to increase the air pressure in the tank, thereby completing the pressure increase in the PV valve. During the process, when the PV valve is immersed in water, the float (4) floats up due to the buoyancy, thereby applying an upward pulling force to the guide rod on the negative pressure valve disc body (20), so that the negative pressure valve disc body (20) and the negative pressure valve disc seal (21) fit more closely, thereby preventing water from entering the ballast tank when the water pressure is too high. At the same time, when the vacuum pressure in the ballast tank needs to be discharged, the user completes it through the vacuum pressure relief rod (1). When the ship needs to measure the water depth of the ballast tank by pressure, it is necessary to ensure that there is no pressure in the tank. At this time, the user presses the vacuum pressure relief rod (1) to support the guide rod below, and the guide rod drives the negative pressure valve disc body (20) to open, so that the inner cavity of the ballast tank is connected with the outside, ensuring that there is no pressure in the tank, thereby completing the discharge of the vacuum pressure in the ballast tank, thereby forming a pressure-free state.

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