Small deepwater limiting sensor

Abstract

The invention relates to a deepwater small limit sensor which comprises a shell, a sliding block, a spring, a contact terminal, a watertight cable, a contact piece and an insert, the shell is cylindrical, an installation space is arranged in the shell, the watertight cable of the shell penetrates through the bottom wall of the shell to be connected with the contact terminal, the contact terminal is located in the installation space and embedded in the insert, and the sliding block is connected with the contact piece. The insert is fixed to the bottom of the installation space, the outer diameter of the insert is smaller than the inner diameter of the installation space so that an annular cavity can be formed between the peripheral wall of the insert and the inner wall of the installation space, the spring is arranged in the installation space, one end of the spring is inserted into the annular cavity, the contact piece is connected to the sliding block, and the sliding block is slidably connected to the installation space. The contact piece faces the contact terminal, and the other end of the spring abuts against the sliding block, so that the sliding block is provided with a first station and a second station. And the characteristics of high water tightness, small size and high reliability are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical sensors, and in particular relates to a small deep-water limit sensor. Background Art

[0002] With the increasing development of the ocean, the demand for deep-water equipment is increasing. In the process of deep-water equipment realizing its movement ability, limit sensors are one of its necessary components. Due to the complexity of the marine environment and the limited load capacity, limit sensors need to consider factors such as deep-water pressure, seawater corrosion, reliability, and miniaturization. At present, there are relatively few limit sensors used in deep-water applications, and they cannot effectively solve the problems of deep-water dynamic reliability, watertightness, miniaturization, and high reliability. Summary of the invention

[0003] In view of this, the present invention provides a small deep-water limit sensor, which has the characteristics of high water tightness, small size and high reliability.

[0004] The technical solution adopted by the present invention is:

[0005] A deepwater small limit sensor comprises a shell, a slider, a spring, a contact terminal, a watertight cable, a contact piece and an insert. The shell is cylindrical and has an installation space therein. The watertight cable of the shell passes through the bottom wall of the shell and is connected to the contact terminal. The contact terminal is located in the installation space. The contact terminal is embedded in the insert. The insert is fixed to the bottom of the installation space. The outer diameter of the insert is smaller than the inner diameter of the installation space, so that an annular cavity is formed between the outer peripheral wall of the insert and the inner wall of the installation space. The spring is arranged in the installation space, and one end of the spring is inserted in the annular cavity. The contact piece is connected to the slider, and the slider is slidably connected to the installation space. The contact piece faces the contact terminal. The other end of the spring abuts against the slider, so that the slider has a first station and a second station.

[0006] At the first station, the slider is close to the insert so that the contact piece contacts the contact terminal.

[0007] At the second station, the slider is away from the insert, and the contact piece and the contact terminal are away from each other;

[0008] In the natural state, the spring presses the slider to be in the second position.

[0009] Preferably, the installation space includes a first cavity and a second cavity connected to each other, the inner diameter of the first cavity is smaller than the inner diameter of the second cavity, the first cavity is far away from the opening of the installation space, the insert is located in the first cavity, the annular cavity is formed between the outer peripheral wall of the insert and the inner wall of the first cavity, a step structure is formed between the first cavity and the second cavity, the slider is slidably matched with the second cavity, and the slider abuts against the step structure at the first workstation.

[0010] Preferably, it further comprises a nut, and an annular limiting groove is formed on the outer edge of the sliding block on the side away from the insert;

[0011] The nut includes a rotating wall and a rotating ring, both of which are annular, the rotating wall and the rotating ring are coaxially connected to each other, a connecting thread is formed on the inner wall of the rotating wall, the inner diameter of the rotating ring is consistent with the radial size of the groove bottom of the limiting groove, the rotating wall is screwed to the side of the shell close to the opening, and the rotating ring is abutted against the opening of the installation space;

[0012] At the second working position, the limiting groove cooperates with the rotating ring.

[0013] Preferably, the outer diameter of the rotating wall is consistent with the outer diameter of the shell.

[0014] Preferably, a limiting ring is connected to a side of the slider facing the insert, the limiting ring extends into the annular cavity, the spring is located on the outside of the limiting ring, and the contact piece is located on the inside of the limiting ring;

[0015] The insert is made of polyurethane, and the limiting ring and the insert are interference-fitted.

[0016] Preferably, the number of the contact terminals is three, namely, a first contact terminal, a second contact terminal and a third contact terminal, the second contact terminal and the third contact terminal extend out of the insert by a first length, the first contact terminal extends out of the insert by a second length, the second length is less than the first length, and the second contact terminal and the third contact terminal are connected to the contact sheet at the first station so that the second contact terminal is conductively connected to the third contact terminal,

[0017] The first contact terminal is connected to the positive pole of the power supply, the second contact terminal is connected to the negative pole of the power supply, an electrical signal detection sensor is arranged between the first contact end and the third contact terminal, and at the second station, the second contact terminal and the third contact terminal are connected through the contact sheet, so that the electrical signal detection sensor can measure the electrical signal.

[0018] Preferably, two annular sealing grooves are provided on the outer circumference of the sliding block, sealing rings are provided in the sealing grooves, and the sliding block is sealed and matched with the second cavity through the sealing rings.

[0019] Preferably, a sealing rubber sleeve is provided between the watertight cable and the bottom wall of the housing.

[0020] Beneficial effects of the present invention:

[0021] The slider can slide between the first position and the second position relative to the installation space. In the first position, the contact piece is connected to the contact terminal, so that a limit signal can be sent out. In the second position, the contact piece is far away from the contact terminal, so there is no conduction between the contact terminals, and thus no limit signal is sent out. Therefore, when an external object touches the slider, the slider can be pushed to slide from the second position to the first position, thereby achieving the purpose of sensing the position of the external object.

[0022] The present invention can prevent external seawater from entering the installation space by arranging two bags of sealing rings and a sealing rubber sleeve, so as to meet the requirements of use in a deep sea environment.

[0023] The insert is made of polyurethane and can seal the bottom of the installation space. At the same time, the interference fit between the limit ring and the insert can prevent seawater from entering the interior of the limit ring, thereby playing a secondary sealing role.

[0024] In extreme environments, if seawater enters the limiting ring, the first contact terminal and the second contact terminal are connected, resulting in a short circuit, so that an alarm can be sounded in advance, indicating that water ingress has occurred in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0026] Figure 1 It is a structural diagram of a small deep-water limit sensor.

[0027] In the figure: 1, nut; 2, sealing ring; 3, slider; 4, housing; 5, watertight cable; 6, insert; 7, spring; 8, contact piece; 9, first contact terminal; 10, second contact terminal; 11, third contact terminal. DETAILED DESCRIPTION

[0028] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid confusing the essence of the present invention, known methods, processes, procedures, and components are not described in detail.

[0029] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0030] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include", "comprising" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

[0031] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0032] See also Figure 1 The present invention provides a deep-water small limit sensor, which is applied to deep-sea environment, and includes a shell 4, a slider 3, a spring 7, a contact terminal, a watertight cable 5, a contact piece 8 and an insert 6. The shell 4 is cylindrical, and an installation space is provided in the shell 4. The watertight cable 5 of the shell 4 passes through the bottom wall of the shell 4 and is connected with the contact terminal. The contact terminal is located in the installation space. The contact terminal is embedded in the insert 6. The insert 6 is fixed to the bottom of the installation space. The outer diameter of the insert 6 is smaller than the inner diameter of the installation space, so that an annular cavity is formed between the outer peripheral wall of the insert 6 and the inner wall of the installation space. The spring 7 is arranged in the installation space, and one end of the spring 7 is inserted in the annular cavity. The contact piece 8 is connected to the slider 3, and the slider 3 is slidably connected to the installation space. The contact piece 8 faces the contact terminal. The other end of the spring 7 abuts against the slider 3, so that the slider 3 has a first station and a second station.

[0033] At the first station, the slider 3 is close to the insert 6 so that the contact piece 8 is in contact with the contact terminal.

[0034] In the second station, the slider 3 is away from the insert 6, and the contact piece 8 and the contact terminal are away from each other;

[0035] In the natural state, the spring 7 presses the slider 3 to be in the second position.

[0036] In the natural state, the spring 7 presses the slider 3 to be in the second position. When the detected object moves, it presses the slider 3, causing the slider 3 to slide to the left, thereby causing the contact piece 8 to slide to the left, causing the contact piece 8 to contact the contact terminal.

[0037] Preferably, the installation space includes a first cavity and a second cavity connected to each other, the inner diameter of the first cavity is smaller than the inner diameter of the second cavity, the first cavity is far away from the opening of the installation space, the insert 6 is located in the first cavity, the annular cavity is formed between the outer peripheral wall of the insert 6 and the inner wall of the first cavity, a step structure is formed between the first cavity and the second cavity, the slider 3 is slidably matched with the second cavity, and the slider 3 abuts against the step structure at the first workstation.

[0038] The step structure is used to limit the position of the slider 3 to prevent the slider 3 from sliding too far to the left and damaging the contact terminal, thereby ensuring the use effect of the present invention.

[0039] Preferably, it further comprises a nut 1, and an annular limiting groove is formed on the outer edge of the sliding block 3 on the side away from the insert 6;

[0040] The nut 1 includes a rotating wall and a rotating ring, both of which are annular, the rotating wall and the rotating ring are coaxially connected to each other, a connecting thread is formed on the inner wall of the rotating wall, the inner diameter of the rotating ring is consistent with the radial size of the groove bottom of the limiting groove, the rotating wall is screwed to the side of the housing 4 close to the opening, and the rotating ring is abutted against the opening of the installation space;

[0041] At the second working position, the limiting groove cooperates with the rotating ring.

[0042] The second working position of the slider 3 is limited by the nut 1 .

[0043] Preferably, the outer diameter of the rotating wall is consistent with the outer diameter of the housing 4 .

[0044] Preferably, a limiting ring is connected to the side of the slider 3 facing the insert 6, the limiting ring extends into the annular cavity, the spring 7 is located on the outside of the limiting ring, and the contact piece 8 is located on the inside of the limiting ring;

[0045] The insert 6 is made of polyurethane, and the limiting ring and the insert 6 are interference fit.

[0046] The setting of the limiting ring can prevent the spring 7 from bending during the compression process and can prevent water from entering the limiting ring, thereby ensuring the use effect of the present invention in the deep sea.

[0047] Preferably, the number of the contact terminals is three, namely, a first contact terminal 9, a second contact terminal 10 and a third contact terminal 11, the second contact terminal 10 and the third contact terminal 11 extend out of the insert 6 by a first length, the first contact terminal 9 extends out of the insert 6 by a second length, the second length is less than the first length, and the second contact terminal 10 and the third contact terminal 11 are connected to the contact sheet 8 at the first station so that the second contact terminal 10 and the third contact terminal 11 are conductively connected,

[0048] The first contact terminal 9 is connected to the positive pole of the power supply, the second contact terminal 10 is connected to the negative pole of the power supply, and an electrical signal detection sensor is arranged between the first contact end and the third contact terminal 11. At the second station, the second contact terminal 10 and the third contact terminal 11 are connected through the contact sheet 8, so that the electrical signal detection sensor can measure the electrical signal.

[0049] Preferably, two annular sealing grooves are provided on the outer periphery of the slider 3 , and sealing rings 2 are provided in the sealing grooves. The slider 3 is sealed and matched with the second cavity through the sealing rings 2 .

[0050] Preferably, a sealing rubber sleeve is provided between the watertight cable 5 and the bottom wall of the housing 4 .

[0051] a) Housing 4

[0052] Since the limit sensor is used in the deep sea, its corrosion resistance and pressure resistance need to be considered in design. Therefore, when designing the housing 4, stainless steel or titanium alloy is selected as the material of the housing 4, which not only meets the requirements of working in a corrosion-resistant environment, but also has good yield strength. The pressure-resistant housing 4 is formed by integrally processing a steel bar, which can effectively avoid the risks brought by other processes in production.

[0053] b) Slider 3

[0054] Since the limit sensor is used in the deep sea, its corrosion resistance and pressure resistance need to be considered in the design. Similarly, when designing the contact head, stainless steel or titanium alloy is also selected, which can not only meet the requirements of working in a corrosion-resistant environment, but also have good yield strength. The steel rod is also used for overall processing and forming, which can effectively avoid the risks brought by other processes in production.

[0055] c) Contact piece 8

[0056] The contact piece 8 is an important part for connecting the pins. It is installed inside the contact head and is composed of the side plates on both sides and the spring 7 in the middle. The side plates on both sides are made of copper plates with good conductivity, so that when the pins are in contact, they can reliably and smoothly transmit electrical signals and complete the conduction function. After the contact piece 8 is welded, it is installed and tightened on the contact head through the through hole in the middle of the side plate with screws. Because it is inside the limit sensor, it meets the requirements of corrosion resistance and watertightness.

[0057] d) Selection of pin type

[0058] The pin is an important component for signal connection and transmission in the limit sensor. Since the carrier space of the entire system equipment is limited, the size of the limit sensor should be designed to be small and not take up too much space. Therefore, according to the designed sensor voltage and current and other parameters, select the cold-pressed pin that meets the design requirements.

[0059] Through the designed voltage and current parameters, a pin with a wire diameter of 0.75 square millimeters is selected, which is small in size and can meet the use requirements.

[0060] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will all be included in the scope of the claims of the present invention.

Claims

1. A small deep-water limit sensor, characterized in that: The utility model comprises a shell, a slider, a spring, a contact terminal, a watertight cable, a contact piece and an insert. The shell is cylindrical, and an installation space is provided in the shell. The watertight cable in the shell passes through the bottom wall of the shell and is connected with the contact terminal. The contact terminal is located in the installation space. The contact terminal is embedded in the insert. The insert is fixed to the bottom of the installation space. The outer diameter of the insert is smaller than the inner diameter of the installation space, so that an annular cavity is formed between the outer peripheral wall of the insert and the inner wall of the installation space. The spring is arranged in the installation space, and one end of the spring is inserted in the annular cavity. The contact piece is connected to the slider, and the slider is slidably connected to the installation space. The contact piece faces the contact terminal. The other end of the spring abuts against the slider, so that the slider has a first station and a second station. At the first station, the slider is close to the insert so that the contact piece contacts the contact terminal. At the second station, the slider is away from the insert, and the contact piece and the contact terminal are away from each other; In the natural state, the spring presses the slider to be in the second position.

2. The deep-water small limit sensor according to claim 1, characterized in that: The installation space includes a first cavity and a second cavity that are connected to each other. The inner diameter of the first cavity is smaller than the inner diameter of the second cavity. The first cavity is far away from the opening of the installation space. The insert is located in the first cavity. The annular cavity is formed between the outer peripheral wall of the insert and the inner wall of the first cavity. A step structure is formed between the first cavity and the second cavity. The slider is slidably matched with the second cavity. At the first station, the slider abuts against the step structure.

3. The deep-water small limit sensor according to claim 2 is characterized in that: It also includes a nut, and an annular limiting groove is formed on the outer edge of the sliding block on the side away from the insert; The nut includes a rotating wall and a rotating ring, both of which are annular, the rotating wall and the rotating ring are coaxially connected to each other, a connecting thread is formed on the inner wall of the rotating wall, the inner diameter of the rotating ring is consistent with the radial size of the groove bottom of the limiting groove, the rotating wall is screwed to the side of the shell close to the opening, and the rotating ring is abutted against the opening of the installation space; At the second working position, the limiting groove cooperates with the rotating ring.

4. The small deep-water limit sensor according to claim 3, characterized in that: The outer diameter of the rotating wall is consistent with the outer diameter of the shell.

5. The small deep-water limit sensor according to claim 4, characterized in that: A limiting ring is connected to one side of the slider facing the insert, the limiting ring extends into the annular cavity, the spring is located on the outside of the limiting ring, and the contact piece is located on the inside of the limiting ring; The insert is made of polyurethane, and the limiting ring and the insert are interference-fitted.

6. The small deep-water limit sensor according to claim 5, characterized in that: The number of the contact terminals is three, namely, a first contact terminal, a second contact terminal and a third contact terminal. The second contact terminal and the third contact terminal extend out of the insert by a first length, and the first contact terminal extends out of the insert by a second length, the second length being smaller than the first length. At the first station, the second contact terminal and the third contact terminal are connected to the contact sheet so that the second contact terminal is conductively connected to the third contact terminal. The first contact terminal is connected to the positive pole of the power supply, the second contact terminal is connected to the negative pole of the power supply, an electrical signal detection sensor is arranged between the first contact end and the third contact terminal, and at the second station, the second contact terminal and the third contact terminal are connected through the contact sheet, so that the electrical signal detection sensor can measure the electrical signal.

7. The small deep-water limit sensor according to claim 6, characterized in that: Two annular sealing grooves are arranged on the outer periphery of the sliding block, sealing rings are arranged in the sealing grooves, and the sliding block is sealed and matched with the second cavity through the sealing rings.

8. The small deep-water limit sensor according to claim 7, characterized in that: A sealing rubber sleeve is arranged between the watertight cable and the bottom wall of the shell.

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