CN212429408U

CN212429408U - Underwater oil cylinder

Info

Publication number: CN212429408U
Application number: CN202021536707.1U
Authority: CN
Inventors: 岳远征; 王明; 朱岭; 陈一尤; 管泽旭; 郑秀磊
Original assignee: Megatec Shanghai Power Technology Co ltd; CCCC First Harbor Engineering Co Ltd; No 2 Engineering Co Ltd of CCCC First Harbor Engineering Co Ltd
Current assignee: Megatec Shanghai Power Technology Co ltd; CCCC First Harbor Engineering Co Ltd; No 2 Engineering Co Ltd of CCCC First Harbor Engineering Co Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-01-29
Anticipated expiration: 2030-07-29

Abstract

The utility model discloses an underwater oil cylinder, which comprises a cylinder body, a cylinder bottom, a piston and a piston rod, wherein the underwater oil cylinder is provided with a linear displacement sensor for measuring the stroke of the piston, and an electronic bin for accommodating a sensor body is arranged in the cylinder bottom; the cylinder bottom is provided with a first flow channel communicated with the electronic bin and the outer wall of the cylinder bottom, the electronic bin and the first flow channel are filled with electronic fluorination liquid, the first flow channel is provided with a plunger type pressure equalizing valve, the plunger type pressure equalizing valve comprises a valve body and a plunger valve core, a cylindrical channel is arranged in the valve body, two ends of the cylindrical channel are respectively used as an inner port and an outer port, the plunger valve core is arranged in the cylindrical channel, the cylindrical channel is provided with a limiting component for preventing the plunger valve core from being separated, and the plunger valve core is abutted to the limiting component close to the outer port under the action. The oil cylinder has a piston stroke testing function, overcomes the insulation problem of underwater operation of electronic elements of the piston stroke testing device, has better waterproof performance, and can better adapt to underwater construction working conditions.

Description

Underwater oil cylinder

Technical Field

The utility model belongs to the technical field of hydraulic pressure machinery, especially, relate to hydro-cylinder under water.

Background

The oil cylinder is also called a hydraulic jack, is a hydraulic execution device which converts hydraulic energy into mechanical energy and makes linear reciprocating motion, and is common pushing or lifting construction equipment. At present, the pulling force required for sinking and pulling the immersed tube tunnel is large, oil cylinders are mostly adopted for pulling and pulling operation, and in order to ensure the tunnel construction precision, the oil cylinders used for underwater immersed tube tunnel construction need to measure the stroke of work.

However, the immersed tube tunnel is used underwater on the seabed under the construction working condition, and the construction period is long. The common oil cylinder and the measuring device for measuring the stroke of the piston rod of the oil cylinder have the advantages that the waterproof performance cannot meet the construction requirement difficultly, especially the insulation and the stability of the underwater live working of electronic components are difficult to ensure for electronic components (such as a displacement sensor and the like) of the stroke measuring device, and meanwhile, the problem that the piston rod is easy to corrode by seawater to cause the quality problem of equipment and the service life of the equipment and the construction process are influenced in long-time underwater operation of the oil cylinder is solved.

Disclosure of Invention

The utility model discloses not enough to prior art, provide hydro-cylinder under water, this hydro-cylinder has piston stroke test function, and has overcome piston stroke testing arrangement's electronic component underwater operation's insulating problem, has better waterproof performance, adaptation that can be better under water the construction operating mode.

In order to achieve the above object, the utility model discloses a technical scheme be:

an underwater oil cylinder comprises a cylinder body, a cylinder bottom, a piston and a piston rod, wherein the piston is in sliding seal fit with the inner wall of the cylinder body, the piston rod is connected with the piston, the underwater oil cylinder is provided with a linear displacement sensor for measuring the stroke of the piston, and an electronic bin for accommodating a sensor body of the linear displacement sensor is arranged in the cylinder bottom; the cylinder bottom is provided with a first flow channel which is communicated with the electronic bin and the outer wall of the cylinder bottom, the electronic bin and the first flow channel are filled with electronic fluorinated liquid, the first flow passage is arranged in the port of the outer wall of the cylinder bottom and is provided with a plunger type pressure equalizing valve, the plunger type pressure equalizing valve comprises a valve body and a plunger valve core, a cylindrical channel is arranged in the valve body, two ends of the cylindrical channel are opened, two ports of the cylindrical channel are respectively arranged inside and outside the first flow passage, to serve as an inner port and an outer port of the cylindrical passage, the plunger spool is mounted in the cylindrical passage, the plunger valve core is in sliding sealing fit with the inner wall of the cylindrical channel, the cylindrical channel is provided with a limiting component for preventing the plunger valve core from falling off the cylindrical channel, the plunger valve core is abutted against the limiting component close to the outer port under the action of the electronic fluorinated liquid.

Preferably, the cylinder bottom is further provided with a communication hole for communicating the electronic bin with the internal space of the cylinder body, the test end of the linear displacement sensor penetrates into the cylinder body from the communication hole to test the stroke of the piston, and the test end is in sealing connection with the communication hole to prevent the electronic fluorinated liquid from entering the cylinder body.

Preferably, the linear displacement sensor is a magnetic displacement sensor, a measuring rod of the magnetic displacement sensor penetrates into the cylinder body from the communicating hole, a first sealing element for sealing a gap between the communicating hole and the measuring rod is arranged between the communicating hole and the measuring rod, the central axis of the measuring rod is parallel to the central axis of the piston rod, a magnetic ring sleeved on the measuring rod is arranged in the cylinder body, and the magnetic ring is fixedly connected with the piston or the piston rod.

Preferably, the measuring rod and the central axis of the piston rod are arranged in a collinear manner, the piston and the piston rod are provided with measuring rod mounting grooves for penetrating the measuring rod, the end face of the piston close to the cylinder bottom is provided with a magnetic ring mounting groove for mounting the magnetic ring, and the magnetic ring is fixedly mounted in the magnetic ring mounting groove.

Preferably, the cylinder bottom is provided with a cable channel for a cable of the magnetic displacement sensor to penetrate, and the cable is connected with the cable channel in a sealing manner to prevent the electronic fluorinated liquid from flowing out of the cylinder bottom.

Preferably, the cylinder bottom is provided with a second flow channel for communicating the electronic bin with the outer wall of the cylinder bottom, a sealing cover for sealing a port of the second flow channel on the outer wall of the cylinder bottom is arranged at the port, and the second flow channel is filled with the electronic fluorinated liquid.

Preferably, at least one first sealing member for sealing a gap between the cylinder bottom and the cylinder body is provided between the cylinder bottom and the cylinder body.

Preferably, a plurality of first sealing members for sealing a gap between the piston and the inner wall of the cylinder body are provided between the piston and the inner wall of the cylinder body.

Preferably, at least one first sealing element for sealing a gap between the piston rod and the piston rod outlet of the cylinder body is arranged between the piston rod and the piston rod outlet of the cylinder body.

Preferably, the surface of the piston rod is plated with a nickel plating anticorrosive coating.

Preferably, the outer surface of the nickel-plated corrosion-resistant layer is plated with a hard chromium wear-resistant layer.

Preferably, the electron fluorination liquid is 3M fluorination liquid.

Preferably, the stop assembly includes a first stop member disposed adjacent the inner port of the cylindrical passage to block removal of the plunger spool from the inner port, and a second stop member disposed adjacent the outer port of the cylindrical passage to block removal of the plunger spool from the outer port.

Preferably, the first limiting part comprises a baffle ring fixedly mounted on the inner wall of the cylindrical channel, the second limiting part comprises a valve cover fixedly mounted on the outer port of the cylindrical channel, and the valve cover is provided with a communication hole for communicating the cylindrical channel and an external water environment.

Preferably, a second sealing member is fixedly mounted on the outer side wall of the plunger valve core, and the second sealing member is used for sealing a gap between the plunger valve core and the inner wall of the cylindrical channel.

Preferably, the second seal is provided in plurality.

Preferably, the plunger type pressure equalizing valve is installed in the first flow passage through a circlip.

Compared with the prior art, the beneficial effects of the utility model are that: the underwater oil cylinder has a piston stroke testing function, overcomes the insulation problem of underwater operation of electronic elements of the piston stroke testing device, has better waterproof performance, and can better adapt to underwater construction working conditions.

Drawings

Fig. 1 is a sectional view of a submersible cylinder of the present embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of the underwater cylinder in the embodiment;

fig. 4 is a schematic structural view of the plunger-type pressure equalizing valve of the present embodiment.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

It should be noted that in the description of the present invention, the terms "inside", "outside", "upper", "lower", "left", "right", "front", "rear", etc. indicate the positional relationship based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

As shown in fig. 1 to 3, an underwater oil cylinder comprises a cylinder body 1, a cylinder bottom 2, a piston 4 in sliding sealing fit with the inner wall of the cylinder body 1, and a piston rod 3 connected with the piston 4, wherein the underwater oil cylinder is provided with a linear displacement sensor for measuring the stroke of the piston 4, and an electronic bin 5 for accommodating a sensor body 8 of the linear displacement sensor is arranged in the cylinder bottom 2; the cylinder bottom 2 is provided with a first flow channel 6 communicating the electronic bin 5 with the outer wall of the cylinder bottom 2, the electronic bin 5 and the first flow channel 6 are filled with electronic fluorinated liquid, the first flow channel 6 is arranged in a port on the outer wall of the cylinder bottom 2 and is provided with a plunger type pressure equalizing valve 7 to prevent the electronic fluorinated liquid from flowing out of the cylinder bottom 2, the plunger type pressure equalizing valve 7 comprises a valve body 71 and a plunger type valve core 75, a cylindrical channel 73 is arranged in the valve body 71, two ends of the cylindrical channel 73 are opened, two ports of the cylindrical channel 73 are respectively arranged in and out of the first flow channel 6 and are used as an inner port and an outer port of the cylindrical channel 73, the plunger type valve core 75 is arranged in the cylindrical channel 73, the plunger type valve core 75 is in sliding sealing fit with the inner wall of the cylindrical channel 73, the cylindrical channel 73 is provided with a limiting component for preventing the plunger type valve core 75 from falling out of the cylindrical channel 73, the plunger valve spool 75 abuts against the limiting component close to the outer port under the action of the electronic fluorinated liquid.

In the underwater oil cylinder, the linear displacement sensor can test the stroke information of the piston 4, the sensor body 8 containing the electronic element of the linear displacement sensor is arranged in the electronic bin 5 in the cylinder bottom 2, the electronic bin 5 is filled with the electronic fluorinated liquid, namely, the electronic element of the linear displacement sensor is soaked in the electronic fluorinated liquid, the electronic bin can be isolated from water entering the electronic bin to protect the electronic element, when the underwater oil cylinder works underwater, the balance of the water pressure outside the electronic bin 5 and the cylinder body 1 can be ensured through the plunger type pressure equalizing valve 7, the plunger valve core 75 of the plunger type pressure equalizing valve 7 can move towards the direction close to the inner port of the cylindrical channel 73 under the action of the water pressure to compress the volume of the electronic fluorinated liquid 5 in the cylinder bottom 1, the internal pressure of the electronic bin 5 is increased, the balance exchange of the internal pressure and external pressure of the electronic bin 5 can be realized, the electronic bin 5 can also utilize the difference of the densities of the, the insulation and the stability of underwater live working of the linear displacement sensor are ensured, and the normal operation of the oil cylinder and the stroke test effect of the oil cylinder are ensured. In conclusion, the oil cylinder has the function of testing the stroke of the piston 4, overcomes the insulation problem of underwater operation of an electronic element of the linear displacement sensor for testing the stroke of the piston 4, has better waterproof performance, and can better adapt to the underwater construction working condition.

Specifically, the cylinder bottom 2 is further provided with a communication hole for communicating the electronic bin 5 with the internal space of the cylinder body 1, a test end of the linear displacement sensor penetrates into the cylinder body 1 from the communication hole to test the stroke of the piston 4, and the test end is connected with the communication hole in a sealing manner to prevent the electronic fluorinated liquid from entering the cylinder body 1.

Specifically, the linear displacement sensor is a magnetic displacement sensor 8, a measuring rod 81 of the magnetic displacement sensor 8 penetrates into the cylinder body 1 from the communicating hole, a first sealing element for sealing a gap between the communicating hole and the measuring rod 1 is arranged between the communicating hole and the measuring rod 1, the central axis of the measuring rod 81 is arranged in parallel to the central axis of the piston rod 3, a magnetic ring 82 sleeved on the measuring rod 81 is arranged in the cylinder body 1, and the magnetic ring 82 is fixedly connected with the piston 4 or the piston rod 3. The first sealing element can seal the gap between the measuring rod 81 and the communicating hole to prevent the electronic fluorinated liquid in the electronic bin 5 from entering the cylinder body 1, the magnetic ring 82 is fixedly connected with the piston 4 or the piston rod 3, and the magnetic ring 82 can move along with the piston 4 to measure the stroke of the piston 4.

Specifically, the measuring rod 81 and the piston rod 3 are arranged in a collinear manner on the central axis, the piston 4 and the piston rod 3 are provided with a measuring rod mounting groove 10 for penetrating the measuring rod 81, the end face of the piston 4 close to the cylinder bottom 2 is provided with a magnetic ring mounting groove for mounting the magnetic ring 82, and the magnetic ring 82 is fixedly mounted in the magnetic ring mounting groove.

Specifically, the cylinder bottom 2 is provided with a cable channel (not shown in the attached drawings) for passing a cable of the magnetic displacement sensor 8, the cable channel is communicated with the electronic cabin 5 and the outer wall of the cylinder bottom 2, and the cable is hermetically connected with the cable channel to prevent the electronic fluorinated liquid from flowing out of the cylinder bottom 2.

Specifically, the cylinder bottom 2 is provided with a second flow channel for communicating the electronic bin 5 with the outer wall of the cylinder bottom 2, a sealing cover 7 for sealing a port of the second flow channel, which is arranged on the outer wall of the cylinder bottom 2, is arranged at the port, and the second flow channel is filled with electronic fluorinated liquid. The second runner is used for filling the electronic fluoride liquid into the electronic bin 5, so that the production and the overhaul of equipment are facilitated.

Specifically, at least one first sealing member 9 for sealing a gap between the cylinder bottom 2 and the cylinder body 1 is arranged between the two. The first sealing element 9 is used for sealing the cylinder bottom 2 of the hydraulic cylinder and the cylinder body 1, and prevents hydraulic oil in the cylinder body 1 from leaking and external water from entering.

Specifically, a plurality of first sealing elements 9 for sealing a gap between the piston 4 and the inner wall of the cylinder 1 are arranged between the piston and the cylinder.

Specifically, at least one first sealing element 9 for sealing a gap between the piston rod 3 and the piston rod outlet of the cylinder body 1 is arranged between the piston rod and the cylinder body. The first sealing element 9 is used for sealing the outlet of the piston rod and the piston rod 3, and prevents hydraulic oil in the cylinder body 1 from leaking and external water from entering.

Specifically, cylinder body 1 is including the cylinder cap that is provided with the piston rod export, the 1 inner wall of cylinder body that the cylinder cap is connected with it is equipped with the helicitic texture of looks adaptation, the cylinder cap passes through helicitic texture and is connected with cylinder body 1, be equipped with the first sealing member that is used for sealing the clearance between the two between cylinder cap and 1 inner wall of cylinder body, prevent that the screw thread from intaking, carry out anticorrosion protection.

Specifically, the surface of the piston rod 3 is plated with a nickel plating anticorrosive coating.

Specifically, the outer surface of the nickel-plated corrosion-resistant layer is plated with a hard chromium wear-resistant layer.

Specifically, the electronic fluorination liquid is 3M fluorination liquid.

Specifically, the stop assembly includes a first stop member disposed proximate the inner port of the cylindrical passage 73 to block the plunger spool 75 from exiting the inner port, and a second stop member disposed proximate the outer port of the cylindrical passage 73 to block the plunger spool 75 from exiting the outer port.

Preferably, the first limiting member comprises a baffle ring 72 fixedly mounted on the inner wall of the cylindrical channel 73, the second limiting member comprises a valve cover 76 fixedly mounted on the outer port of the cylindrical channel 73, and the valve cover 76 is provided with a communication hole for communicating the cylindrical channel 73 with the external water environment.

Preferably, a second sealing member 74 is fixedly mounted on an outer side wall of the plunger valve element 75, and the second sealing member 74 is used for sealing a gap between the plunger valve element 75 and an inner wall of the cylindrical passage 73.

Preferably, the second seal 74 is provided in plural.

Specifically, the plunger-type pressure equalizing valve 7 is installed in the first flow passage 6 by a circlip.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. An underwater oil cylinder comprises a cylinder body, a cylinder bottom, a piston in sliding seal fit with the inner wall of the cylinder body, and a piston rod connected with the piston, and is characterized in that the underwater oil cylinder is provided with a linear displacement sensor for measuring the stroke of the piston, and an electronic bin for accommodating a sensor body of the linear displacement sensor is arranged in the cylinder bottom; the cylinder bottom is provided with a first flow channel which is communicated with the electronic bin and the outer wall of the cylinder bottom, the electronic bin and the first flow channel are filled with electronic fluorinated liquid, the first flow passage is arranged in the port of the outer wall of the cylinder bottom and is provided with a plunger type pressure equalizing valve, the plunger type pressure equalizing valve comprises a valve body and a plunger valve core, a cylindrical channel is arranged in the valve body, two ends of the cylindrical channel are opened, two ports of the cylindrical channel are respectively arranged inside and outside the first flow passage, to serve as an inner port and an outer port of the cylindrical passage, the plunger spool is mounted in the cylindrical passage, the plunger valve core is in sliding sealing fit with the inner wall of the cylindrical channel, the cylindrical channel is provided with a limiting component for preventing the plunger valve core from falling off the cylindrical channel, the plunger valve core is abutted against the limiting component close to the outer port under the action of the electronic fluorinated liquid.

2. The underwater oil cylinder as claimed in claim 1, wherein the cylinder bottom is further provided with a communication hole for communicating the electronic bin with the internal space of the cylinder body, a testing end of the linear displacement sensor penetrates into the cylinder body from the communication hole to test the stroke of the piston, and the testing end is hermetically connected with the communication hole.

3. The underwater oil cylinder as claimed in claim 2, wherein the linear displacement sensor is a magnetic displacement sensor, a measuring rod of the magnetic displacement sensor penetrates into the cylinder body from the communicating hole, a first sealing member for sealing a gap between the communicating hole and the measuring rod is arranged between the communicating hole and the measuring rod, the central axis of the measuring rod is parallel to the central axis of the piston rod, a magnetic ring sleeved on the measuring rod is arranged in the cylinder body, and the magnetic ring is fixedly connected with the piston or the piston rod.

4. The underwater oil cylinder as claimed in claim 3, wherein the measuring rod is arranged in a same line with a central axis of the piston rod, the piston and the piston rod are provided with measuring rod mounting grooves for passing through the measuring rod, an end surface of the piston close to the cylinder bottom is provided with magnetic ring mounting grooves for mounting the magnetic ring, and the magnetic ring is fixedly mounted in the magnetic ring mounting grooves.

5. The underwater oil cylinder as claimed in claim 3, wherein a cable channel for passing a cable of the magnetic displacement sensor is formed in the cylinder bottom, and the cable is hermetically connected with the cable channel; the cylinder bottom is provided with a second flow channel communicated with the electronic bin and the outer wall of the cylinder bottom, a sealing cover used for sealing a port of the outer wall of the cylinder bottom is arranged at the port of the second flow channel, and the second flow channel is filled with electronic fluorinated liquid.

6. The underwater cylinder according to claim 1, wherein at least one first sealing member for sealing a gap between the cylinder bottom and the cylinder body is provided therebetween; at least one first sealing element for sealing a gap between the piston rod and the piston rod outlet of the cylinder body is arranged between the piston rod and the piston rod outlet of the cylinder body.

7. The underwater oil cylinder as claimed in claim 1, wherein the surface of the piston rod is plated with a nickel-plated corrosion-resistant layer, and the outer surface of the nickel-plated corrosion-resistant layer is plated with a hard chromium wear-resistant layer; the electronic fluorination liquid is 3M fluorination liquid.

8. The subsea cylinder of claim 1, wherein the stop assembly comprises a first stop member disposed proximate the inner port of the cylindrical passage to block withdrawal of the plunger spool from the inner port, and a second stop member disposed proximate the outer port of the cylindrical passage to block withdrawal of the plunger spool from the outer port.

9. The underwater oil cylinder as claimed in claim 8, wherein the first limiting part comprises a baffle ring fixedly mounted on the inner wall of the cylindrical channel, the second limiting part comprises a valve cover fixedly mounted on the outer port of the cylindrical channel, and the valve cover is provided with a communication hole for communicating the cylindrical channel and an external water environment.

10. The underwater cylinder as claimed in claim 1, wherein a second sealing member is fixedly installed on an outer side wall of the plunger core, and the second sealing member is used for sealing a gap between the plunger core and an inner wall of the cylindrical passage.