Piston type double-pressure compensator

Abstract

The invention discloses a piston type double-pressure compensator which comprises a compensator barrel, a water-permeable end cover and a sealing connecting flange, and a water-permeable pipe, wherein the two ends of the compensator barrel are detachably connected with the water-permeable end cover and the sealing connecting flange; the piston is connected to the inner side of the compensator in a sleeved mode and comprises a first piston and a second piston which are of an integrated structure. Two ends of the elastic component are respectively connected with the permeable end cover and the first piston; the watertight connector assembly is fixed to the second piston and extends to the side portion of the sealing connecting flange. According to the piston type double-pressure compensator provided by the invention, a double-layer piston structure is arranged in the compensator barrel, so that the compensator barrel is divided into the water cavity, the air cavity and the oil cavity, and the elastic assembly is additionally arranged in the water cavity, so that the pressure in the oil cavity is slightly larger than that in the water cavity; and meanwhile, the water cavity and the oil cavity are separated by adopting the air cavity, so that the situation that the use of the double-pressure compensator is affected due to leakage is further prevented.

Description

Technical Field

[0001] The invention relates to a piston type double pressure compensator, belonging to the technical field of deep sea equipment. Background Art

[0002] With the continuous development of the deep sea, the corresponding demand for deep sea equipment is also increasing. Because the deep sea environment is very harsh and the sea water pressure is high, it is necessary to fully consider the sealing and reliability during the production of underwater equipment, and reduce maintenance costs during subsequent maintenance.

[0003] At present, pressure compensators are mostly used to improve the pressure resistance of underwater equipment to meet the requirements of sealing and reliability. Traditional pressure compensation methods are mostly hose-type, bladder-type or piston-type, but they all have certain shortcomings. For example, once the hose or bladder of the hose-type and bladder-type pressure compensators are worn or ruptured, leakage will occur, and the compensator will fail quickly, causing catastrophic consequences and seriously affecting the safety and reliability of the equipment. Similarly, traditional piston-type compensators also have factors such as sealing failure. Once they fail, they will cause damage to the equipment and property loss. Therefore, there is a need for a pressure compensator that increases the safety and reliability of underwater equipment. Summary of the invention

[0004] Therefore, an object of the present invention is to provide a piston-type dual pressure compensator to increase the safety and reliability of underwater equipment.

[0005] In order to achieve the above object, the present invention provides a piston-type dual pressure compensator, comprising:

[0006] The compensator cylinder has water-permeable end covers and sealing connection flanges detachably connected at both ends;

[0007] A piston, sleeved on the inner side of the compensator cylinder, comprising a first piston and a second piston of an integral structure;

[0008] An elastic component, two ends of which are respectively connected to the water-permeable end cover and the first piston;

[0009] A watertight joint assembly is fixed to the second piston and extends to the side of the sealing connection flange.

[0010] Furthermore, a groove is provided on an end surface of the water-permeable end cover away from the piston for fixing the filter cover.

[0011] Furthermore, a first annular groove is provided around the first piston for accommodating a scraper ring.

[0012] Furthermore, it also includes a water leakage detection device, which is fixed between the first piston and the second piston and fixed to the axis of the second piston through a connecting piece.

[0013] Furthermore, the connecting piece is fixedly connected to the watertight joint assembly.

[0014] Furthermore, a second annular groove is provided around the second piston for accommodating a sealing assembly.

[0015] Furthermore, the water-permeable end cover and the sealing connection flange are respectively detachably connected to the compensator cylinder by bolts.

[0016] Furthermore, the elastic component is a spring.

[0017] Furthermore, the compensator cylinder is divided into three cavities by the first piston and the second piston;

[0018] A water cavity is formed between the water-permeable end cover and the first piston, an air cavity is formed between the first piston and the second piston, and an oil cavity is formed between the second piston and the watertight joint assembly.

[0019] By adopting the above technical scheme, the present invention provides a piston-type dual-pressure compensator, which divides the compensator cylinder into a water chamber, an air chamber and an oil chamber by arranging a double-layer piston structure inside the compensator cylinder, and adds an elastic component in the water chamber so that the pressure in the oil chamber is slightly greater than the pressure in the water chamber, so that the dual-pressure compensator ensures the safe use of underwater equipment. At the same time, the air chamber is used to separate the water chamber from the oil chamber, thereby further preventing the dual-pressure compensator from leaking and affecting its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A cross-sectional view of a piston-type dual pressure compensator provided by the present invention;

[0021] Figure 2 An exploded diagram of a piston-type dual pressure compensator provided by the present invention;

[0022] Figure 3 A working principle diagram of a piston-type dual pressure compensator provided by the present invention.

[0023] In the figure: 1. compensator cylinder; 2. permeable end cover; 3. sealing connection flange; 4. piston; 5. first piston; 6. second piston; 7. water chamber; 8. elastic component; 9. watertight joint component; 10. filter cover; 11. scraper ring; 12. water leakage detection device; 13. connector; 14. sealing component; 15. air chamber; 16. oil chamber. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below through the accompanying drawings and specific embodiments. In general, the pressure compensators used to improve the pressure resistance of underwater equipment include hose type, bladder type or piston type, which will affect the safety and reliability of underwater equipment to a certain extent, so a safe and reliable pressure compensator is needed.

[0025] Example

[0026] like Figures 1 to 3 As shown, the present invention provides a piston type dual pressure compensator, comprising:

[0027] The compensator cylinder 1 has a water-permeable end cover 2 and a sealing connection flange 3 detachably connected at both ends; the water-permeable end cover 2 and the sealing connection flange 3 are detachably connected to the compensator cylinder 1 by bolts.

[0028] The end surface of the water-permeable end cover 2 away from the piston 4 is provided with a groove for fixing the filter cover 10. The function of the filter cover 10 is to prevent impurities and organisms in the seawater from penetrating.

[0029] The piston 4 is sleeved on the inner side of the compensator, and includes a first piston 5 and a second piston 6 of an integral structure; a first annular groove is provided around the first piston 5 for placing a scraper ring 11. A second annular groove is provided around the second piston 6 for placing a sealing assembly 14. Inside the above-mentioned cavity, a water leakage detection device 12 is fixed between the first piston 5 and the second piston 6, and is fixed to the axis of the second piston 6 through a connecting piece 13. The compensator cylinder 1 is divided into three cavities by the first piston 5 and the second piston 6;

[0030] There is a water cavity 7 between the water-permeable end cover 2 and the first piston 5, an air cavity 15 between the first piston 5 and the second piston 6, and an oil cavity 16 between the second piston 6 and the watertight joint assembly 9. When the piston 4-type dual pressure compensator contacts seawater and fills the entire space of the water cavity 7, the air cavity 15 is used to separate the water cavity 7 and the oil cavity 16, and as the diving depth increases, the first piston 5 and the second piston 6 both move toward the oil cavity 16, thereby compressing the space of the oil cavity 16.

[0031] It should be added here that due to the increase in deep-sea pressure, the first piston 5 may leak, so a scraper ring 11 is added around the compensator cylinder 1 and the first piston 5, which not only removes dirt but also increases the sealing effect; when the first piston 5 leaks, the water leakage detection component, including but not limited to the use of a water inlet sensor, checks for water leakage and prompts an alarm.

[0032] The elastic component 8 has two ends connected to the water-permeable end cover 2 and the first piston 5 respectively; in an optional embodiment, the elastic component 8 is a spring. Due to the use of the spring, the pressure in the oil chamber 16 is slightly greater than the seawater pressure, thereby improving the reliability of the pressure compensator, because even when the maximum water depth is reached, there is still a compensation margin due to the presence of the spring.

[0033] The watertight joint assembly 9 is fixed to the second piston 6 and extends to the side of the sealing connection flange 3. The connecting member 13 is fixedly connected to the watertight joint assembly 9. The watertight joint assembly 9 is connected to the oil chamber 16 of the external compensation device during actual use.

[0034] The working process of the above piston 4-type dual pressure compensator is as follows:

[0035] When the piston 4 type dual pressure compensator is working, the water enters the water chamber 7 through the water-permeable end cover 2H port with the filter cover 10, and the oil chamber 16 is connected to the oil chamber 16 of the external compensation device through the watertight joint assembly 9, so the oil chamber 16 is filled with oil through the Y port; the water chamber 7 and the oil chamber 16 are blocked by the air chamber 15 separated by the first piston 5 and the second piston 6;

[0036] As the diving depth increases, the first piston 5 and the second piston 6 squeeze the oil chamber 16 toward the Y port, until the pressure in the oil chamber 16 is slightly greater than the seawater pressure under the action of the spring, and a balanced state is reached.

[0037] When the first piston 5 leaks, a water leakage detection component, such as a water inlet sensor, disposed between the first piston 5 and the second piston 6 detects water leakage and then gives an alarm. The piston-type dual-pressure compensator provided by the present invention divides the compensator cylinder into a water chamber, an air chamber, and an oil chamber by arranging a double-layer piston structure inside the compensator cylinder, and adds an elastic component in the water chamber so that the pressure in the oil chamber is slightly greater than the pressure in the water chamber, so that the dual-pressure compensator ensures the safe use of underwater equipment, and at the same time uses an air chamber to separate the water chamber from the oil chamber, thereby further preventing the dual-pressure compensator from leaking and affecting its use.

Claims

1. A piston type dual pressure compensator, characterized in that: include: The compensator cylinder has water-permeable end covers and sealing connection flanges detachably connected at both ends; A piston, sleeved on the inner side of the compensator cylinder, comprising a first piston and a second piston of an integral structure; An elastic component, two ends of which are respectively connected to the water-permeable end cover and the first piston; A watertight joint assembly is fixed to the second piston and extends to the side of the sealing connection flange.

2. The piston type dual pressure compensator according to claim 1, characterized in that: A groove is provided on the end surface of the water-permeable end cover away from the piston, which is used to fix the filter cover.

3. The piston type dual pressure compensator according to claim 1, characterized in that: A first annular groove is provided around the first piston for accommodating a scraper ring.

4. The piston type dual pressure compensator according to claim 1, characterized in that: It also includes a water leakage detection device, which is fixed between the first piston and the second piston and fixed to the axis of the second piston through a connecting piece.

5. The piston type dual pressure compensator according to claim 4, characterized in that: The connecting piece is fixedly connected to the watertight joint assembly.

6. The piston type dual pressure compensator according to claim 1, characterized in that: A second annular groove is provided around the second piston for accommodating a sealing assembly.

7. The piston type dual pressure compensator according to claim 1, characterized in that: The water-permeable end cover and the sealing connection flange are respectively detachably connected to the compensator cylinder by bolts.

8. The piston type dual pressure compensator according to claim 1, characterized in that: The elastic component is a spring.

9. The piston type dual pressure compensator according to claim 1, characterized in that: The compensator cylinder is divided into three chambers by the first piston and the second piston; A water cavity is formed between the water-permeable end cover and the first piston, an air cavity is formed between the first piston and the second piston, and an oil cavity is formed between the second piston and the watertight joint assembly.

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