CN219795744U - Underwater oil cylinder - Google Patents
Underwater oil cylinder Download PDFInfo
- Publication number
- CN219795744U CN219795744U CN202321329645.0U CN202321329645U CN219795744U CN 219795744 U CN219795744 U CN 219795744U CN 202321329645 U CN202321329645 U CN 202321329645U CN 219795744 U CN219795744 U CN 219795744U
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- cylinder
- cylinder body
- piston rod
- maintaining device
- annular cavity
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- 238000007789 sealing Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model relates to an underwater oil cylinder, comprising: a cylinder; a piston rod slidably disposed in the cylinder; an annular cavity is formed at the contact part of the inner wall of the end part of the cylinder body and the outer wall of the piston rod; a joint connecting the annular chamber with a pressure maintaining device; when the pressure maintaining device works, gas in the pressure maintaining device is filled into the annular cavity, so that the air pressure in the annular cavity is larger than the water pressure outside the cylinder body; the pressure maintaining device is used for filling gas into the annular cavity, so that the air pressure in the annular cavity is larger than the external water pressure, water can not enter the cylinder body from the gap between the cylinder body and the piston rod, the sealing performance of the underwater oil cylinder is guaranteed, and the air pressure provided by the pressure maintaining device is larger along with the deeper placement depth of the underwater oil cylinder, so that the sealing performance of the underwater oil cylinder is guaranteed.
Description
Technical Field
The utility model relates to an oil cylinder, in particular to an underwater oil cylinder.
Background
The underwater oil cylinder is a hydraulic execution device which converts hydraulic energy into mechanical energy and performs linear reciprocating motion, and is common pushing or lifting construction equipment; at present, the sinking and pulling of the immersed tube tunnel requires large pulling force, and the underwater oil cylinder is mostly adopted for pulling cooperation;
the existing underwater oil cylinder needs to work under the water depth of 200 and the water pressure of 2Mpa, and the excessive water pressure can enter the cylinder body from the gap between the cylinder body and the piston rod, so that the sealing performance of the underwater oil cylinder can not be ensured;
in summary, how to ensure the sealing performance of the underwater oil cylinder is an urgent need for researchers in the field.
Disclosure of Invention
The utility model aims to solve the technical problems that: how to ensure the tightness of the underwater oil cylinder
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model relates to an underwater oil cylinder, comprising: a cylinder; a piston rod slidably disposed in the cylinder; an annular cavity is formed at the contact part of the inner wall of the end part of the cylinder body and the outer wall of the piston rod; a joint connecting the annular chamber with a pressure maintaining device; when the pressure maintaining device works, gas in the pressure maintaining device is filled into the annular cavity, so that the air pressure in the annular cavity is larger than the water pressure outside the cylinder body;
the underwater oil cylinder often carries out failure seal from the sliding connection of the cylinder body and the piston rod, in the scheme, the pressure maintaining device is used for filling gas into the annular cavity, so that the air pressure in the annular cavity is larger than the external water pressure, and the water can not enter the cylinder body from the clearance between the cylinder body and the piston rod, so that the sealing performance of the underwater oil cylinder is ensured, and the air pressure provided by the pressure maintaining device is larger along with the deeper the placement depth of the underwater oil cylinder.
In order to illustrate the structure adopted by the pressure maintaining device, the utility model adopts the piston type energy accumulator.
In order to further prevent water from entering the cylinder body, the utility model adopts the structure that a waterproof ring is also arranged on the inner wall of the end part of the cylinder body and is in sealing connection with the outer wall of the piston rod; the outer wall of the waterproof ring is provided with a clamping groove connected with the cylinder body; the inner wall of the end part of the waterproof ring is provided with a sealing ring; the hardness of the sealing ring is greater than that of the waterproof ring;
in the scheme, the waterproof ring is arranged between the cylinder body and the piston rod to realize sealing, and the waterproof ring is arranged between the sealing ring and the piston rod, so that the sealing ring can tightly hold the piston rod more firmly to prevent moisture from entering the cylinder body from a gap between the piston rod and the waterproof ring;
in addition, through setting up the draw-in groove can be with the waterproof circle and the cylinder body between the two be connected in the cooperation.
The utility model has the beneficial effects that: the utility model relates to an underwater oil cylinder, wherein air is filled into an annular cavity through a pressure maintaining device, so that the air pressure in the annular cavity is larger than the external water pressure, thus water cannot enter the cylinder body from the gap between the cylinder body and a piston rod, the sealing performance of the underwater oil cylinder is ensured, and the air pressure provided by the pressure maintaining device is larger along with the deeper placement depth of the underwater oil cylinder, so that the sealing performance of the underwater oil cylinder is ensured.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a cross-sectional view of the present utility model;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is an enlarged view at B in FIG. 2;
in the figure: 1-cylinder body, 2-piston rod, 3-annular cavity, 4-joint, 5-pressure maintaining device, 6-waterproof ring, 7-sealing ring and 8-draw-in groove.
Detailed Description
The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.
As shown in fig. 1-2, the present utility model is an underwater cylinder comprising: a cylinder 1; a piston rod 2 slidably disposed in the cylinder 1; an annular cavity 3 is formed at the contact part of the inner wall of the end part of the cylinder body 1 and the outer wall of the piston rod 2; a joint 4 connecting the annular chamber 3 with a pressure maintaining device 5; when the pressure maintaining device 5 works, the gas in the pressure maintaining device 5 is filled into the annular cavity 3, so that the air pressure in the annular cavity 3 is larger than the water pressure outside the cylinder body 1;
the underwater oil cylinder often carries out failure seal from the sliding connection of the cylinder body and the piston rod, in the scheme, the pressure maintaining device is used for filling gas into the annular cavity, so that the air pressure in the annular cavity is larger than the external water pressure, and the water can not enter the cylinder body from the clearance between the cylinder body and the piston rod, so that the sealing performance of the underwater oil cylinder is ensured, and the air pressure provided by the pressure maintaining device is larger along with the deeper the placement depth of the underwater oil cylinder.
As shown in fig. 1-2, in order to illustrate the structure of the pressure maintaining device, the present utility model adopts a piston type accumulator as the pressure maintaining device 5.
As shown in fig. 1-3, in order to further prevent water from entering the cylinder, the utility model adopts that a waterproof ring 6 is also arranged at the inner wall of the end part of the cylinder 1 and is in sealing connection with the outer wall of the piston rod 2; the outer wall of the waterproof ring 6 is provided with a clamping groove 8 connected with the cylinder body 1; the inner wall of the end part of the waterproof ring 6 is provided with a sealing ring 7; the hardness of the sealing ring 7 is larger than that of the waterproof ring 6;
in the scheme, the waterproof ring is arranged between the cylinder body and the piston rod to realize sealing, and the waterproof ring is arranged between the sealing ring and the piston rod, so that the sealing ring can tightly hold the piston rod more firmly to prevent moisture from entering the cylinder body from a gap between the piston rod and the waterproof ring;
in addition, through setting up the draw-in groove can be with the waterproof circle and the cylinder body between the two be connected in the cooperation.
With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (3)
1. An underwater cylinder, comprising:
a cylinder;
a piston rod slidably disposed in the cylinder;
an annular cavity is formed at the contact part of the inner wall of the end part of the cylinder body and the outer wall of the piston rod;
a joint connecting the annular chamber with a pressure maintaining device;
when the pressure maintaining device works, gas in the pressure maintaining device is filled into the annular cavity, so that the air pressure in the annular cavity is larger than the water pressure outside the cylinder body.
2. An underwater cylinder as claimed in claim 1, wherein the pressure maintaining means is a piston accumulator.
3. The underwater oil cylinder as claimed in claim 1, wherein a waterproof ring is further arranged on the inner wall of the end part of the cylinder body and is in sealing connection with the outer wall of the piston rod;
the outer wall of the waterproof ring is provided with a clamping groove connected with the cylinder body;
the inner wall of the end part of the waterproof ring is provided with a sealing ring;
the hardness of the sealing ring is greater than that of the waterproof ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321329645.0U CN219795744U (en) | 2023-05-29 | 2023-05-29 | Underwater oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321329645.0U CN219795744U (en) | 2023-05-29 | 2023-05-29 | Underwater oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219795744U true CN219795744U (en) | 2023-10-03 |
Family
ID=88181562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321329645.0U Active CN219795744U (en) | 2023-05-29 | 2023-05-29 | Underwater oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219795744U (en) |
-
2023
- 2023-05-29 CN CN202321329645.0U patent/CN219795744U/en active Active
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