A non-contact synchronous coupling waterproof draw-wire displacement sensor

Abstract

The name of the present invention is a non-contact synchronous coupling waterproof draw-wire displacement sensor. It belongs to the technical field of draw-wire displacement sensors. It mainly solves the problem that the current draw-wire displacement sensor cannot be used in special harsh environments because the electronic part and the mechanical draw-wire part cannot be isolated. Its main features are: it includes an electronic part containing a sensor and a mechanical draw-wire part containing a draw-wire box and a spring assembly; the electronic part and the mechanical draw-wire part are connected through a flange plate assembly; the sensor is installed in an electronic bin; the shaft of the draw-wire box and the spring assembly extends into the electronic bin and is connected to the rotating shaft of the sensor through a non-contact synchronous coupling. The present invention has the characteristics of completely isolating the electronic part and the mechanical draw-wire part, convenient installation and simple use, and is mainly used in special harsh environments such as inside chemical liquids, deep in large rivers and seas, flammable and explosive, oily, dusty, etc.

Description

Technical Field

[0001] The present invention belongs to the technical field of rope displacement sensors, and particularly relates to a non-contact synchronous coupling waterproof rope ruler displacement sensor. Background Art

[0002] A rope displacement sensor, also known as a wire rope displacement sensor, a rope sensor, a rope electronic ruler, etc., combines the advantages of an angle sensor and a linear displacement sensor, and becomes an excellent displacement sensor with a compact structure, a small installation space size, a long measurement stroke, a high measurement accuracy, and reliable performance.

[0003] Currently, the commonly used rope displacement sensors on the market all include an electronic part and a mechanical wire rope part. The electronic part includes a sensor, and the mechanical wire rope part includes a wire rope box and a spring assembly, etc. The electronic part and the mechanical wire rope part share a rotating shaft, and it is very difficult for the shaft seal to prevent the medium from leaking. Therefore, the electronic part and the mechanical wire rope part cannot or cannot completely be isolated, which limits the use of the current rope displacement sensors in special and harsh environments such as in chemical liquids, deep in the great rivers and seas, flammable and explosive, oily, dusty, etc. Summary of the Invention

[0004] The present invention aims at the above deficiencies and provides a non-contact synchronous coupling waterproof rope ruler displacement sensor that can completely isolate the electronic part and the mechanical wire rope part, and can be widely used in special and harsh environments such as in chemical liquids, deep in the great rivers and seas, flammable and explosive, oily, dusty, etc.

[0005] The technical solution of the present invention is: a non-contact synchronous coupling waterproof rope ruler displacement sensor, including an electronic part containing a sensor and a mechanical wire rope part containing a wire rope box and a spring assembly, characterized in that: the electronic part and the mechanical wire rope part are connected through a flange plate assembly; the sensor is installed in an electronic bin; the shaft of the wire rope box and the spring assembly extends into the electronic bin and is connected to the rotating shaft of the sensor through a non-contact synchronous coupling.

[0006] In the technical solution of the present invention, the non-contact synchronous coupling includes a second magnet seat assembly and a first magnet seat assembly; the second magnet seat assembly is fixedly connected to the rotating shaft of the sensor, and the first magnet seat assembly is fixedly connected to the shaft; the second magnet seat assembly and the first magnet seat assembly are arranged at intervals.

[0007] In the technical solution of the present invention, the sensor is a potentiometer; a circuit board is welded on the potentiometer and fixed on a potentiometer mounting seat; a sealing ring groove and an O-ring are provided at the contact part between the potentiometer mounting seat and the electronic bin.

[0008] In the technical solution of the present invention, the second magnet base assembly includes a metal first magnet base with a mounting hole, and a first powerful magnet composed of three or more powerful permanent magnet blocks with alternately distributed magnetic poles. The first powerful magnet is installed and fixed in the hole position of the first magnet base; the first magnet base assembly includes a metal second magnet base with a mounting hole, and a second powerful magnet composed of three or more powerful permanent magnet blocks with alternately distributed magnetic poles. The second powerful magnet is installed and fixed in the hole position of the second magnet base.

[0009] In the technical solution of the present invention, the first powerful magnet is a cylindrical powerful magnet composed of three powerful permanent magnet blocks in the direction of NSN poles. There is a potting groove between the first powerful magnet and the first magnet base; the second powerful magnet is a cylindrical powerful magnet composed of three powerful permanent magnet blocks in the direction of SNS poles. There is a potting groove between the second powerful magnet and the second magnet base.

[0010] In the technical solution of the present invention, the installation space of the potentiometer in the electronic compartment is provided with potting glue, which is separated by the bottom partition of the electronic compartment between the second magnet base assembly and the first magnet base assembly.

[0011] In the technical solution of the present invention, the flange plate assembly includes a bearing flange, a first bearing installed in the bearing position of the bearing flange, and a shaft inserted into the inner hole of the first bearing.

[0012] In the technical solution of the present invention, the wire drawing box includes a main body frame, an upper cover plate of the main body frame, a second bearing, a shaft inserted into the inner hole of the second bearing, a lower cover plate of the main body frame, a wire wheel and a steel wire rope installed in the main body frame, and a wire outlet assembly fixed in the hole position of the main body frame; the second bearing is installed in the hole position of the lower cover plate of the main body frame; one end of the steel wire rope passes through the wire outlet assembly, and the other end passes through the small hole of the wire wheel and is knotted and fixed at both ends; the upper cover plate of the main body frame is fixedly connected to the flange plate assembly.

[0013] In the technical solution of the present invention, the spring assembly includes a spring cover and a spring installed in the spring cover; first and second tetrafluoro gaskets are provided at both ends of the spring; the spring cover is fixedly connected to the wire drawing box.

[0014] In the technical solution of the present invention, the upper end of the electronic compartment is provided with an upper cover plate assembly composed of a waterproof joint and an upper cover plate.

[0015] In the present invention, based on a rope displacement sensor composed of an electronic part with a sensor and a mechanical rope part with a rope pulling box and a spring assembly, the electronic part and the mechanical rope part are connected through a flange plate assembly. The sensor is installed in an electronic chamber, and the shaft of the rope pulling box and the spring assembly extends into the electronic chamber and is connected to the rotating shaft of the sensor through a non-contact synchronous coupling. Therefore, potting glue can be provided in the electronic chamber above the potentiometer mounting seat, and the second magnet seat assembly and the first magnet seat assembly are separated by the bottom partition of the electronic chamber, so that the electronic part and the mechanical rope part can be completely isolated, thereby achieving the effect of preventing the medium in special and harsh occasions from contaminating the electronic part.

[0016] The present invention has the characteristics of completely isolating the electronic part and the mechanical rope part, convenient installation and simple use, and is mainly used in special and harsh occasions such as inside chemical liquids, deep in the great rivers and seas, flammable and explosive, oil pollution, sand, dust, etc. Brief Description of the Drawings

[0017] Figure 1 It is an assembly schematic diagram of some product parts of the present invention.

[0018] Figure 2 It is an assembly schematic diagram of another part of the product parts of the present invention.

[0019] Figure 3 It is an assembly schematic diagram of the product components of the present invention.

[0020] Figure 4 It is a schematic diagram of the finished product of the present invention.

[0021] In the figure: 1 - waterproof joint; 2 - upper cover plate; 3 - potentiometer; 4 - circuit board; 5 - potentiometer mounting seat; 6 - O-ring; 7 - electronic chamber; 8 - button head screw; 9 - first magnet seat; 10 - button head screw; 11 - first strong magnet; 12 - second strong magnet; 13 - second magnet seat; 14 - hexagon socket head screw; 15 - bearing flange; 16 - first bearing; 17 - flat head screw; 18 - shaft; 19 - flat head screw; 20 - upper cover plate of the main body frame; 21 - wire outlet assembly; 22 - main body frame; 23 - wire wheel; 24 - steel wire rope; 25 - second bearing; 26 - lower cover plate of the main body frame; 27 - flat head screw; 28 - first PTFE gasket; 29 - spring; 30 - second PTFE gasket; 31 - spring cover; 32 - hexagon socket head screw; a - upper cover plate assembly; b - electronic chamber; c - potentiometer assembly; d - second magnet seat assembly; e - first magnet seat assembly; f - flange plate assembly; g - rope pulling box; h - spring assembly; i - finished product. Detailed Description of the Invention

[0022] In order to more clearly illustrate the technical solution of the present invention, the embodiments of the present invention will be further described in detail below.

[0023] As Figures 1 to 4 shown, a non-contact synchronous coupling waterproof draw-wire displacement sensor according to an embodiment of the present invention includes a finished product i composed of an upper cover plate assembly a, an electronic compartment b, a potentiometer assembly c, a second magnet seat assembly d, a first magnet seat assembly e, a flange plate assembly f, a draw-wire box g, and a spring assembly h.

[0024] Among them, a waterproof connector 1 is installed and fixed on the upper cover plate 2 to form the upper cover plate assembly a. The waterproof connector 1 is the same as the existing waterproof connector. The upper cover plate 2 is the upper end cover plate of the electronic compartment 7.

[0025] The potentiometer assembly c includes a potentiometer 3, a circuit board 4 welded to the potentiometer 3, and a potentiometer mounting seat 5 for fixing the potentiometer 3. A sealing ring groove and an O-ring 6 are provided at the contact part between the potentiometer mounting seat 5 and the electronic compartment 7.

[0026] The second magnet seat assembly d includes a metal first magnet seat 9 with mounting holes, and a first strong magnet 11 in a cylindrical shape composed of three strong permanent magnet blocks in the NSN pole direction. The first strong magnet 11 is installed and fixed in the cylindrical hole position of the first magnet seat 9. The three strong permanent magnet blocks are in planar contact in sequence. The two side strong permanent magnet blocks are the same sector shapes, and the two ends of the middle strong permanent magnet block are arc-shaped. The magnetic pole surfaces of the three strong permanent magnet blocks are parallel to the cross-section of the first magnet seat 9. A circumferential potting groove is provided on the outer circumferential surface of the first strong magnet 11, a circumferential potting groove is provided on the inner circumferential surface of the first magnet seat 9, and a potting port communicating with the potting groove is provided on the first magnet seat 9. Potting compound can be poured into the potting groove through the potting port to install and fix the first strong magnet 11 and the first magnet seat 9 together. The first magnet seat 9 is fixedly connected to the rotating shaft of the potentiometer 3.

[0027] The first magnet seat assembly e includes a metal second magnet seat 13 with mounting holes, and a second strong magnet 12 in a cylindrical shape composed of three strong permanent magnet blocks in the SNS pole direction. The second strong magnet 12 is installed and fixed in the cylindrical hole position of the second magnet seat 13. The three strong permanent magnet blocks are in planar contact in sequence. The two side strong permanent magnet blocks are the same sector shapes, and the two ends of the middle strong permanent magnet block are arc-shaped. The magnetic pole surfaces of the three strong permanent magnet blocks are parallel to the cross-section of the potentiometer 3. A circumferential potting groove is provided on the outer circumferential surface of the second strong magnet 12, a circumferential potting groove is provided on the inner circumferential surface of the second magnet seat 13, and a potting port communicating with the potting groove is provided on the second magnet seat 13. Potting compound can be poured into the potting groove through the potting port to install and fix the second strong magnet 12 and the second magnet seat 13 together. The second magnet seat 13 is fixedly connected to the rotating shaft of the shaft 18.

[0028] The flange assembly f includes a bearing flange 15, a first bearing 16 installed in the bearing position of the bearing flange 15, and a shaft 18 inserted into the inner hole of the first bearing 16. The shaft 18 extends into the electronic compartment 7 and is fixedly connected to the second magnet seat 13.

[0029] The electronic compartment b is an integral cylindrical shape. The potentiometer assembly c and the second magnet seat assembly d are installed in the electronic compartment 7 above the partition, and the first magnet seat assembly e is installed in the electronic compartment 7 below the partition. The spacing between the first strong magnet 11 and the second strong magnet 12 can be adjusted by adjusting the positions of the potentiometer mounting seat 5 and / or the flange assembly f relative to the electronic compartment 7. There is potting glue in the electronic compartment 7 above the potentiometer mounting seat 5. The electronic compartment 7 is fixedly connected to the upper cover plate 20 of the main body frame through the bearing flange 15.

[0030] The wire drawing box g is the same as the existing wire drawing box, including a main body frame 22, a main body frame upper cover plate 20, a second bearing 25, a shaft 18 inserted into the inner hole of the second bearing 25, a main body frame lower cover plate 26, a wire wheel 23 and a steel wire rope 24 installed in the main body frame 22), and a wire outlet assembly 21 fixed in the hole position of the main body frame 22. The second bearing 25 is installed in the hole position of the main body frame lower cover plate 26; one end of the steel wire rope 24 passes through the wire outlet assembly 21, and the other end passes through the small hole of the wire wheel 23, and both ends are knotted and fixed.

[0031] The spring assembly h is the same as the existing spring assembly, including a spring cover 31 and a spring 29 installed in the spring cover 31. The two ends of the spring 29 are provided with a first PTFE gasket 28 and a second PTFE gasket 30. The spring cover 31 is fixedly connected to the main body frame lower cover plate 26.

[0032] The assembly of the present invention specifically includes the following steps:

[0033] The first step: Fix the waterproof joint 1 on the upper cover plate 2 to form the upper cover plate assembly a;

[0034] The second step: First, weld the circuit board 4 on the terminal of the potentiometer 3, then fix the potentiometer 3 on the potentiometer mounting seat 5, and finally install the O-ring 6 in the card slot of the potentiometer mounting seat 5 to form the potentiometer assembly c;

[0035] The third step: Fix three first strong magnets 11 in the hole positions of the first magnet seat 9 in the direction of NSN poles to form the second magnet seat assembly d;

[0036] The fourth step: Fix three second strong magnets 12 in the hole positions of the second magnet seat 13 in the direction of SNS poles to form the first magnet seat assembly e;

[0037] Fifth step: Install the first bearing 16 of 608 into the bearing position of the bearing flange 15, then insert the shaft 18 into the inner hole of the first bearing 16 of 608, and then fix the bearing flange 15 on the upper cover plate 20 of the main body frame with two M3*6 socket head cap screws 14 to form the flange assembly f;

[0038] Sixth step: Fix the wire outlet assembly 21 in the hole position of the main body frame 22. Pass one end of the steel wire rope 24 (the coiled part in the schematic diagram) through the wire outlet assembly 21, and the other end into the small hole of the wire wheel 23. Then lay the steel wire of the corresponding length flat around the wire wheel 23, tie the two ends of the steel wire rope 24 and fix them. Finally, place the wire wheel wound with the steel wire rope 24 into the main body frame 22 to form the wire pulling box g;

[0039] Seventh step: Place the second PTFE gasket 30 into the spring cover 31, and then install the spring 29 into the spring cover 31 to form the spring assembly h;

[0040] Eighth step: Install the second magnet seat assembly d on the axis of the potentiometer assembly c and fix it with an M3*8 button head screw 10. Then install the assembled fitting into the electronic bin 7 from the top of the electronic bin 7. Then install the first magnet seat assembly e on the axis at one end of the flange assembly f and fix it with a flat head screw 17. Then pass the other end shaft of the flange assembly f through the inner hole of the wire wheel 23, and then fix the assembly with 4 4*10 flat head screws 19 on the wire pulling box g. Press the second bearing 25 of 61800 into the bearing hole of the lower cover plate 26 of the main body frame, then pass it through the shaft 18, and fix the lower cover plate 26 of the main body frame on the wire pulling box g with 4 4*10 flat head screws 27. Then pass the first PTFE gasket 28 through the shaft 18 and install it on the lower cover plate 26 of the main body frame. Then snap the spring assembly h into the slot of the shaft 18 and fix the assembly with 4 M3*20 socket head cap screws 32 on the lower cover plate 26 of the main body frame. Then install the assembled electronic bin 7 on the flange assembly f, adjust the position and fix it with 3 M4 button head screws 8. Finally, install the upper cover plate assembly a on the electronic bin assembly b and fix it with potting glue to form the finished product i.

[0041] The above first to seventh steps complete the assembly of all the zero - parts components of the wire pulling sensor, as Figure 1 、 Figure 2 shown. The eighth step completes the assembly of the wire pulling sensor from the zero - parts components to the finished product, as Figure 3 、 Figure 4 shown.

Claims

1. A non-contact synchronous coupling waterproof pull rope displacement sensor, comprising an electronic part with a sensor and a mechanical pull rope part with a pull rope box (g) and a spring assembly (h), characterized in that: The described electronic part and the mechanical cable part are connected through a flange assembly (f); the sensor is installed in the electronic compartment (7); the sensor is a potentiometer (3), on which a circuit board (4) is welded and fixed on a potentiometer mounting seat (5), and a sealing ring groove and an O-ring (6) are provided at the contact part between the potentiometer mounting seat (5) and the electronic compartment (7); the shaft (18) of the cable box and the spring assembly extends into the electronic compartment (7) and is connected to the rotating shaft of the sensor through a non-contact synchronous coupling; the non-contact synchronous coupling includes a second magnet seat assembly (d) and a first magnet seat assembly (e), the second magnet seat assembly (d) is fixedly connected to the rotating shaft of the sensor, and the first magnet seat assembly (e) is fixedly connected to the shaft (18); the second magnet seat assembly (d) and the first magnet seat assembly (e) are arranged at intervals and are separated by the bottom partition of the electronic compartment between the second magnet seat assembly and the first magnet seat assembly; the second magnet seat assembly (d) includes a metal first magnet seat (9) with a mounting hole, a first powerful permanent magnet (11) composed of three or more powerful permanent magnet blocks with alternately distributed magnetic poles, the first powerful permanent magnet (11) is installed and fixed in the cylindrical hole of the first magnet seat (9), the powerful permanent magnet blocks are in plane contact in turn, the powerful permanent magnet blocks on both sides are the same sector bodies, the two ends of the middle powerful permanent magnet block are arc-shaped, and the magnetic pole surfaces of the powerful permanent magnet blocks are parallel to the cross-section of the first magnet seat (9); the first magnet seat assembly (e) includes a metal second magnet seat (13) with a mounting hole, a second powerful permanent magnet (12) composed of three or more powerful permanent magnet blocks with alternately distributed magnetic poles, the second powerful permanent magnet (12) is installed and fixed in the cylindrical hole of the second magnet seat (13), the powerful permanent magnet blocks are in plane contact in turn, the powerful permanent magnet blocks on both sides are the same sector bodies, the two ends of the middle powerful permanent magnet block are arc-shaped, and the magnetic pole surfaces of the powerful permanent magnet blocks are parallel to the cross-section of the potentiometer (3).

2. The non-contact synchronous coupling waterproof pull rope displacement sensor according to claim 1, characterized in that: The described first powerful permanent magnet (11) is a cylindrical powerful magnet composed of three powerful permanent magnet blocks in the direction of NSN poles, and a potting groove is provided between the first powerful permanent magnet (11) and the first magnet seat (9); the second powerful permanent magnet (12) is a cylindrical powerful magnet composed of three powerful permanent magnet blocks in the direction of SNS poles, and a potting groove is provided between the second powerful permanent magnet (12) and the second magnet seat (13).

3. The non-contact synchronous coupling waterproof draw-wire displacement sensor according to claim 1 or 2, characterized in that: There is potting glue in the electronic compartment (7) above the potentiometer mounting seat (5).

4. The non-contact synchronous coupling waterproof draw-wire displacement sensor according to claim 1 or 2, characterized in that: The described flange assembly (f) includes a bearing flange (15), a first bearing (16) installed in the bearing position of the bearing flange (15), and a shaft (18) inserted into the inner hole of the first bearing (16).

5. A non-contact synchronous coupling waterproof draw-wire displacement sensor according to claim 1 or 2, characterized in that: The described wire drawing box (g) includes a main body frame (22), an upper cover plate (20) of the main body frame, a second bearing (25), a shaft (18) inserted into the inner hole of the second bearing (25), a lower cover plate (26) of the main body frame, a wire wheel (23) and a wire rope (24) installed in the main body frame (22), and a wire outlet assembly (21) fixed in the hole position of the main body frame (22); the second bearing (25) is installed in the hole position of the lower cover plate (26) of the main body frame; one end of the wire rope (24) passes through the wire outlet assembly (21), and the other end passes through the small hole of the wire wheel (23), and both ends are knotted and fixed; the upper cover plate (20) of the main body frame is fixedly connected to the flange plate assembly (f).

6. The non-contact synchronous coupling waterproof draw-wire displacement sensor according to claim 1 or 2, characterized in that: The described spring assembly (h) includes a spring cover (31) and a spring (29) installed in the spring cover (31); first and second PTFE gaskets (28) and (30) are provided at both ends of the spring (29); the spring cover (31) is fixedly connected to the wire drawing box (g).

7. The non-contact synchronous coupling waterproof draw-wire displacement sensor according to claim 1 or 2, characterized in that: An upper cover plate assembly (a) composed of a waterproof joint (1) and an upper cover plate (2) is provided at the upper end of the described electronic compartment (7).

Images