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Mechanical underwater limit switch

An underwater limit switch, a mechanical technology, is applied in mechanical control devices, devices that prevent/restrict/restore the movement of parts of the control mechanism, instruments, etc. , to achieve the effect of low cost, simple structure and high reliability

Inactive Publication Date: 2006-08-02
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inductive proximity switches and photoelectric switches have no movement mechanism, so they are easy to be sealed underwater and are convenient for underwater use, but they have the following disadvantages: the proximity switch is limited by the proximity distance, and generally the switch can only operate effectively within a few millimeters. High requirements; when the photoelectric switch is used underwater, it is also limited by the working distance due to light attenuation, and it cannot be used in a mixed water environment
At present, there is no mechanical limit switch specially applied to underwater. Therefore, there is an urgent need for a mechanical limit switch to be applied underwater, especially in deeper waters.

Method used

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  • Mechanical underwater limit switch
  • Mechanical underwater limit switch

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Embodiment Construction

[0011] please if figure 1 , figure 2 As shown, it is a mechanical underwater limit switch provided by the present invention, which mainly includes:

[0012] A pressure-resistant shell 1, the rear end of which is provided with a guide hole 11, and the end of the guide hole 11 communicates with the outside world;

[0013] An end cover 2, which is arranged at the front end of the pressure-resistant housing 1, and a drive rod accommodation hole 21 is arranged in the center of the end cover 2, and the drive rod accommodation hole 21 is coaxial with the guide hole 11 and has the same diameter;

[0014] A driving rod 3, the front part 31 and the rear part 32 are equal in diameter, the middle part is provided with a shoulder 33, the front part 31 of the driving rod is tightly accommodated in the driving rod accommodating hole 21, and the rear part 32 of the driving rod is tightly accommodated in the guide hole 11;

[0015] An electric switch 4, which is arranged inside the pressur...

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Abstract

The present invention discloses a mechanical underwater limit switch. It includes the following several portions: a pressure-resistant shell body, the rear end of its interior is equipped with a guide hole, the tail end of said guide hole is communicated with exterior; an end cover, it is placed in the front end of pressure-resistant shell body, the centre of said end cover is equipped with a drive bar holding hole; a drive bar, its front portion and rear portion are identical in diameter, and its middle portion is equipped with a shoulder portion, the front portion of the drive bar is tightly placed in the drive bar holding hole, and the rear portion of said drive bar is tightly placed in the guide hole; an electric switch, it is placed in the interior of said pressure-resistant shell body, the pressure sheet of said electric switch is placed in the position correspondent to the shoulder portion of said drive bar; and a reset spring, it is placed between the described end cover and drive bar.

Description

technical field [0001] The invention relates to a limit switch, in particular to a mechanical underwater limit switch which is simple in structure, convenient to use and applicable to relatively deep waters. Background technique [0002] The underwater equipment and instruments used in marine underwater engineering and technology often need to use limit switches to realize the control of the system. Limit switches can generally be divided into inductive proximity switches, photoelectric switches and mechanical switches. Inductive proximity switches and photoelectric switches have no movement mechanism, so they are easy to be sealed underwater and are convenient for underwater use, but they have the following disadvantages: the proximity switch is limited by the proximity distance, and generally the switch can only operate effectively within a few millimeters. The requirements are high; when the photoelectric switch is used underwater, it is also limited by the working dista...

Claims

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Application Information

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IPC IPC(8): G05G5/05
Inventor 马厦飞房晓明王道炎任平刘春厚
Owner CHINA NAT OFFSHORE OIL CORP
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