CN114754806A

CN114754806A - Protective optical fiber sensor for laser

Info

Publication number: CN114754806A
Application number: CN202210362527.3A
Authority: CN
Inventors: 袁博; 袁银权
Original assignee: Wuhan City Vocational College
Current assignee: Wuhan City Vocational College
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-07-15

Abstract

The invention provides a protective optical fiber sensor for a laser, belongs to the technical field of sensing equipment, and solves the problems that fine dust in the air cannot be filtered in the heat dissipation process of some existing optical fiber sensors, and the protective performance is poor. The protective optical fiber sensor for the laser comprises an outer shell, a shell cover, a circuit body, a probe end body, a fan body and a lifting plate, wherein the circuit body is fixedly arranged at the top of the lifting plate. According to the invention, fine dust in the air can be filtered and adsorbed by the active carbon filter plate in the heat dissipation process, so that the fine dust is prevented from entering the interior of the sensor, the protection of the sensor against the dust is improved, meanwhile, the active carbon filter plate can be conveniently replaced by a worker, in the maintenance process, the cover can be opened by the worker, a tool is not needed in the opening process, and the circuit can be driven to rise in the opening process of the cover, so that the circuit is positioned on the outer side of the outer shell.

Description

Protective optical fiber sensor for laser

Technical Field

The invention belongs to the technical field of sensing equipment, relates to an optical fiber sensor, and particularly relates to a protective optical fiber sensor for a laser.

Background

The distributed optical fiber sensor adopts a unique distributed optical fiber detection technology and has the following characteristics: the sensing element in the distributed optical fiber sensing system is only an optical fiber; the measured one-dimensional distribution diagram in the whole optical fiber area can be obtained by one-time measurement, and the measured two-dimensional and three-dimensional distribution conditions can be measured by arranging the optical fiber into a grating shape; the spatial resolution of the otdr system is generally in the magnitude of meter, and the spatial resolution of the ofdr technology can reach the magnitude of millimeter; the measurement precision and the spatial resolution of the system generally have a mutual restriction relationship; the detection signal is weak generally, so that a signal processing system is required to have a higher signal-to-noise ratio; in the detection process, a large amount of signal addition averaging, frequency scanning, phase tracking and other processing are required, so that a long time is required for one complete measurement.

Through retrieval, for example, chinese patent literature discloses a distributed optical fiber sensor with high efficiency of heat dissipation [ application number: CN 201922304776.3; publication No.: CN211121352U ]. The high-efficiency heat-dissipation distributed optical fiber sensor comprises an optical fiber sensor body and a mounting box, wherein a closed door is arranged on the mounting box, a lock catch is arranged on the closed door, a lock groove is arranged on the lock catch and the mounting box in a locking matching mode, a partition plate is arranged in the mounting box, the mounting box is separated into a power cavity and a heat dissipation cavity by the partition plate, a fixed column and a mounting column are arranged in the heat dissipation cavity, the mounting column is connected with a reset spring, the two reset springs are connected with a clamp column together, and the clamp column and the fixed column fix the optical fiber sensor body together.

The optical fiber sensor who discloses in this patent adopts the fan to dispel the heat, and it prevents dust to add to be equipped with the filter screen, but the tiny dust in the air can't be filtered by the filter screen, tiny dust can get into the inside of sensor along with the fan, use for a long time, cause the circuit of sensor to be covered by the dust easily, influence the radiating effect, and in-process overhauing the circuit of inside, still need use tools to dismantle the shell of sensor, the time that maintenance work consumes has been increased, and the staff still need visit the inside of shell with maintenance tools such as electrography and operate, the inside space of shell is too narrow and small, the operation degree of difficulty has been increased among this intangible.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a protective optical fiber sensor for a laser, which can filter and adsorb fine dust in the air through an active carbon filter plate in the heat dissipation process, improve the protection of the sensor on the dust, and facilitate the replacement of the active carbon filter plate by workers.

The purpose of the invention can be realized by the following technical scheme:

A protective optical fiber sensor for a laser comprises an outer shell, a shell cover, a circuit body, a probe end body, a fan body and a lifting plate, wherein the circuit body is fixedly arranged at the top of the lifting plate, a first dustproof net is embedded on the surface of the shell cover, an air duct is communicated with the bottom of the outer shell, the fan body is fixedly arranged in the air duct, a second dustproof net is arranged at the bottom of the air duct, a frame is arranged in the outer shell, an active carbon filter plate is arranged in the frame, a through groove is formed in the surface of one side of the outer shell in a penetrating manner, the frame is in sliding connection with the inner wall of the through groove, strips are fixedly arranged on two sides of the top of the outer shell, sliding grooves are formed in two sides of the bottom of the shell cover and are in sliding connection with the inner wall of the sliding grooves, and first rack plates are fixedly arranged on two sides of the bottom of the shell cover, the inside opposite side of shell body rotates and is connected with the actuating lever, the inside and the outside of shell body are provided with positioning mechanism, the both sides on actuating lever surface are all overlapped and are equipped with drive gear, and drive gear and first rack plate intermeshing, the both ends of actuating lever are all fixed and are provided with first conical gear, the both sides of shell body are all rotated and are connected with the transfer line, the both sides on transfer line surface are all overlapped and are equipped with drive gear, the fixed second conical gear that is provided with in one end of transfer line, and first conical gear and second conical gear intermeshing, the both sides of lifter plate are all fixed and are provided with the second rack plate, and drive gear and second rack plate intermeshing.

The working principle of the invention is as follows: the knob is rotated to drive the positioning bolt to be separated from the surface of the rubber ring, then the shell cover is pushed to drive the first rack plate to move together, thereby driving the driving gear to drive the driving rod and the first bevel gears on the two sides of the driving rod to synchronously rotate, then driving the two groups of transmission rods to rotate together through the second bevel gear, driving the second rack plate to drive the lifting plate to move upwards through the transmission gear, enabling the circuit body to be positioned outside the outer shell body, facilitating the maintenance, opening the fan body for heat dissipation, enabling air to enter the lower part inside the outer shell body through the first dustproof net and the air duct, then the activated carbon filter plate can absorb and filter fine dust in the air, the flowing air takes away heat through the circuit body and is discharged from the second dustproof net, the rotating plate is rotated to be positioned above the circuit body, then pulling the handle to drive the frame to separate from the inner part of the outer shell, and then replacing a new active carbon filter plate.

The positioning mechanism comprises a rubber ring, a threaded sleeve and a positioning bolt, the threaded sleeve penetrates through the surface of the outer shell, the positioning bolt is in threaded connection with the inner wall of the threaded sleeve, and the rubber ring is fixedly arranged on the surface of the driving rod.

Structure more than adopting for fix a position cap and lifter plate, so that overhaul work.

And one end of the positioning bolt, which is far away from the rubber ring, is fixedly provided with a knob, and the outer diameter of the knob is larger than the inner diameter of the threaded sleeve.

Adopt above structure for provide the stress point, so that the staff rotates the positioning bolt.

The portable lifting device is characterized in that movable plates are fixedly arranged on two sides of the bottom of the lifting plate, movable grooves are formed in two sides of the inner wall of the outer shell, and the movable plates are connected with the inner walls of the movable grooves in a sliding mode.

By adopting the structure, the lifting plate can only move up and down, and the second rack plate is prevented from being separated from the transmission gear.

The fly leaf is the setting of L type, the height of vertical groove is the same with the height of shell body inner wall.

The structure is adopted, so that more movement intervals of the lifting plate are reserved.

One side of shell body is run through and is provided with vertical groove, the fixed surface of probe end body is provided with the shutoff piece, and the inner wall sliding connection in shutoff piece and vertical groove.

The structure more than adopting leaves for probe end body movement interval, prevents simultaneously that external air and dust from getting into inside through vertical groove.

The top of shell body just is located one side in vertical groove and has seted up the depressed groove, the inner wall sliding connection of first rack board and depressed groove.

Structure more than adopting makes first rack board can normal motion, prevents that first rack board is obstructed.

One side of the outer shell is rotatably connected with a rotating plate, and one side of the frame is fixedly provided with a handle.

Structure more than adopting to the staff pulls out the frame, changes the active carbon filter.

The length of rectangular is the same with the length of shell body, rectangular whole is the design of T style of calligraphy, the shape and the rectangular shape of spout inner wall are imitative.

Adopt above structure for avoid the spout to break away from rectangular surface.

The first bevel gears at the two ends of the driving rod are the same in specification and size, and the first bevel gears and the second bevel gears are the same in specification and size.

By adopting the structure, the rotating speed of the two groups of transmission rods is ensured, so that the lifting movement of the lifting plate is ensured.

Compared with the prior art, the protective optical fiber sensor for the laser has the following advantages:

1. the invention can filter and adsorb fine dust in the air through the active carbon filter plate in the heat dissipation process, so that the fine dust is prevented from entering the interior, the protection performance of the sensor on the dust is improved, meanwhile, the active carbon filter plate is convenient for workers to replace, in the maintenance process, the cover can be opened by the workers, tools are not needed in the opening process, and the cover can drive the circuit to ascend in the opening process, so that the circuit is positioned on the outer side of the outer shell, the operation space of the workers is enlarged, the operation difficulty is reduced, and the problems that the fine dust in the air cannot be filtered and the protection performance is poor in the heat dissipation process of some existing optical fiber sensors are solved.

2. Through the setting of rubber circle, thread bush and positioning bolt, open or the closed back at the cap, rotate positioning bolt, it begins to be close to the rubber circle under the effect of thread bush inner wall, until positioning bolt and the surface of rubber circle laminate mutually, under the effect of frictional force to actuating lever and transfer line location, the realization carries out the effect of fixing a position to the position of cap and lifter plate, so that the staff overhauls the work.

3. Through the arrangement of the movable plate and the movable groove, the lifting plate can drive the movable plate to slide in the movable groove in the up-and-down movement process, so that the lifting plate can only move in the vertical direction, and the second rack plate is prevented from being separated from the transmission gear due to the deviation of the lifting plate.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the present invention with the cover open.

Fig. 3 is a perspective view illustrating the elevating plate according to the present invention.

Fig. 4 is a schematic perspective view of the outer case of the present invention.

Fig. 5 is a schematic perspective view of the outer case of the present invention.

FIG. 6 is a schematic bottom view of the housing cover of the present invention.

Fig. 7 is a bottom view of the outer case of the present invention.

FIG. 8 is a schematic representation of the present invention with the activated carbon filter plate separated from the frame.

In the figure, 1, an outer shell; 2. a shell cover; 3. a circuit body; 4. a probe end body; 5. a first dust screen; 6. an air duct; 7. a fan body; 8. a second dust screen; 9. a frame; 10. an activated carbon filter plate; 11. a through groove; 12. a strip; 13. a chute; 14. a first rack plate; 15. a drive rod; 16. a positioning mechanism; 161. a rubber ring; 162. a threaded sleeve; 163. positioning the bolt; 164. a knob; 17. a drive gear; 18. a first bevel gear; 19. a transmission rod; 20. a transmission gear; 21. a second bevel gear; 22. a second rack plate; 23. a lifting plate; 24. a vertical groove; 25. a plugging block; 26. a rotating plate; 27. a handle; 28. a movable plate; 29. a movable groove; 30. a recessed groove.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-8, the protective optical fiber sensor for a laser includes an outer housing 1, a housing cover 2, a circuit body 3, a probe end body 4, a fan body 7, and a lifting plate 23, wherein the circuit body 3 is fixedly disposed on the top of the lifting plate 23, a first dust screen 5 is embedded on the surface of the housing cover 2, an air duct 6 is disposed in the bottom of the outer housing 1, the fan body 7 is bolted in the air duct 6, a second dust screen 8 is disposed at the bottom of the air duct 6, a frame 9 is disposed in the outer housing 1, an activated carbon filter plate 10 is disposed in the frame 9, a through groove 11 is formed in the surface of one side of the outer housing 1, the frame 9 is slidably connected to the inner wall of the through groove 11, strips 12 are bolted to both sides of the top of the outer housing 1, sliding grooves 13 are formed in both sides of the bottom of the housing cover 2, and the strips 12 are slidably connected to the inner wall of the sliding groove 13, the two sides of the bottom of the shell cover 2 are also bolted with first rack plates 14, the other side inside the shell body 1 is rotatably connected with a driving rod 15, the inside and the outside of the shell body 1 are provided with positioning mechanisms 16, the two sides of the surface of the driving rod 15 are both sleeved with driving gears 17, the driving gears 17 are meshed with the first rack plates 14, the two ends of the driving rod 15 are both fixedly provided with first conical gears 18, the two sides of the shell body 1 are both rotatably connected with transmission rods 19, the two sides of the surface of the transmission rod 19 are both sleeved with transmission gears 20, one end of the transmission rod 19 is fixedly provided with second conical gears 21, the first conical gears 18 are meshed with the second conical gears 21, the two sides of the lifting plate 23 are both bolted with second rack plates 22, the transmission gears 20 are meshed with the second rack plates 22, and the sensor can filter and adsorb fine dust in the air through the activated carbon filter plate 10 in the heat dissipation process, avoid tiny dust to get into inside, improve the protectiveness of this sensor to the dust, also make things convenient for the staff to change active carbon filter 10 simultaneously, and overhaul the in-process, the staff can open cap 2, need not with the help of the instrument at the in-process of opening, and cap 2 also can drive the circuit at the in-process of opening and rise, thereby make the circuit be located the outside of shell body 1, staff's operating space has been enlarged, reduce the operation degree of difficulty, some current optical fiber sensor have been solved at the radiating process, can't filter the tiny dust in the air, the not good enough problem of protectiveness.

The positioning mechanism 16 comprises a rubber ring 161, a threaded sleeve 162 and a positioning bolt 163, the threaded sleeve 162 penetrates through the surface of the outer shell 1, the positioning bolt 163 is in threaded connection with the inner wall of the threaded sleeve 162, and the rubber ring 161 is fixedly arranged on the surface of the driving rod 15.

A knob 164 is fixedly arranged at one end of the positioning bolt 163 far away from the rubber ring 161, and the outer diameter of the knob 164 is larger than the inner diameter of the threaded sleeve 162, and in this embodiment, through the arrangement of the knob 164, it is used for providing a force bearing point on the surface of the positioning bolt 163, so that a worker can hold the knob 164 to rotate the positioning bolt 163.

In the embodiment, through the arrangement of the movable plate 28 and the movable groove 29, the lifting plate 23 can drive the movable plate 28 to slide inside the movable groove 29 in the up-and-down movement process, so that the lifting plate 23 can only move in the vertical direction, and the second rack plate 22 is prevented from being separated from the transmission gear 20 due to the deviation of the lifting plate 23.

The movable plate 28 is the setting of L type, the height of vertical groove 24 is the same with the height of shell body 1 inner wall, in this embodiment, if the height on movable plate 28 surface and lifter plate 23 parallel and level each other, then can cause lifter plate 23 at the in-process that rises, movable plate 28 and the touching of transfer line 19, thereby make lifter plate 23 can't rise to the position that is higher than transfer line 19, be the setting of L through designing movable plate 28, make the external of movable plate 28 be less than lifter plate 23, thereby leave the space of more upward motions of lifter plate 23, so that lifter plate 23 rises to the eminence, make things convenient for the staff to overhaul circuit body 3.

One side of shell body 1 runs through and is provided with vertical groove 24, the fixed surface of probe end body 4 is provided with blocking piece 25, and blocking piece 25 and the inner wall sliding connection of vertical groove 24, in this embodiment, through the setting of vertical groove 24 and blocking piece 25, because circuit body 3 need follow probe end body 4 and go up and down together, and vertical groove 24 can be left for probe end body 4 interval of motion, blocking piece 25 can follow probe end body 4 and move up and down together simultaneously, thereby block vertical groove 24, prevent that external air and dust from getting into the inside of shell body 1 through vertical groove 24.

The concave groove 30 has been seted up at the top of shell body 1 and the one side that is located vertical groove 24, the inner wall sliding connection of first rack plate 14 and concave groove 30, in this embodiment, through the setting of concave groove 30, it is used for giving first rack plate 14 space of moving to make first rack plate 14 can normally follow the cap 2 motion, prevent that first rack plate 14 is obstructed.

In the embodiment, through the arrangement of the rotating plate 26 and the handle 27, when the frame 9 is located inside the outer shell 1, the rotating plate 26 is rotated to the lower part, so that the frame 9 is blocked and prevented from being separated from the inside of the outer shell 1, and when the frame 9 is taken out, the rotating plate 26 can be rotated to the upper part, and the handle 27 is used for providing a stress point on the surface of the frame 9, so that a worker can pull out the frame 9.

The length of rectangular 12 is the same with the length of shell body 1, and the whole of rectangular 12 is the design of T style of calligraphy, and the shape of 13 inner walls of spout is similar with rectangular 12's shape, and in this embodiment, the whole through designing rectangular 12 is the design of T style of calligraphy, and it makes rectangular 12 can laminate the inner wall of spout 13, and when taking up cap 2 directly over from moreover, cap 2 is the surface that can not break away from rectangular 12 to avoid cap 2 to drop.

In the present embodiment, if the rotation speeds of the transmission rods 19 on both sides are different, both sides of the lifting plate 23 cannot be lifted synchronously, which affects the lifting plate 23 to complete normal lifting actions, but the above design is used to ensure that the rotation speeds of the driving rods 15 on both sides are the same, so that the lifting plate 23 can complete normal lifting actions.

The working principle of the invention is as follows: in the using process, if the circuit body 3 needs to be overhauled, firstly, the knob 164 is rotated to drive the positioning bolt 163 to separate from the surface of the rubber ring 161, then the housing cover 2 is pushed to move, the housing cover 2 makes sliding motion on the surface of the strip 12 through the sliding groove 13, the housing cover 2 drives the first rack plate 14 to move together in the moving process, as the first rack plate 14 is meshed with the driving gear 17, the driving gear 17 drives the driving rod 15 to start to rotate, the driving rod 15 drives the first bevel gears 18 at two sides to synchronously rotate in the rotating process, then the second bevel gears 21 at two sides drive the two groups of transmission rods 19 to rotate together, the rotating directions of the two groups of transmission rods 19 are different, as the engaging directions of the transmission gears 20 on the surfaces of the two groups of transmission rods 19 and the second rack plates 22 are different, so that the second rack plates 22 at two sides drive the lifting plates 23 to move upwards, thereby driving the circuit body 3 to move upwards, making the circuit body 3 be positioned outside the outer shell 1, and rotating the positioning bolt 163 to position, then the worker can carry out maintenance work, in the using process of the sensor, the fan body 7 is opened to radiate heat, the outside air enters the ventilation duct 6 through the first dustproof net 5, the first dustproof net 5 can filter large impurity dust in the air, then the air enters the lower part of the inner part of the outer shell 1, then the air passes through the active carbon filter plate 10, the active carbon filter plate 10 can filter fine dust in the air, then the flowing air takes away heat through the circuit body 3, and thereby the second dustproof net 8 is discharged, if the active carbon filter plate 10 needs to be replaced, only the rotating plate 26 needs to be rotated to be positioned above, then the handle 27 is pulled to drive the frame 9 to leave from the inner part of the outer shell 1, then the activated carbon filter plate 10 positioned at the inner side of the frame 9 is taken down, then a new activated carbon filter plate 10 is replaced, and the frame 9 is put into the outer shell 1 again.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments, or alternatives may be employed, by those skilled in the art, without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A protective optical fiber sensor for a laser comprises an outer shell (1), a shell cover (2), a circuit body (3), a probe end body (4), a fan body (7) and a lifting plate (23), and is characterized in that the circuit body (3) is fixedly arranged at the top of the lifting plate (23), a first dust screen (5) is embedded on the surface of the shell cover (2), a ventilation duct (6) is communicated with the bottom of the outer shell (1), the fan body (7) is fixedly arranged in the ventilation duct (6), a second dust screen (8) is arranged at the bottom of the ventilation duct (6), a frame (9) is arranged in the outer shell (1), an active carbon filter plate (10) is arranged in the frame (9), a through groove (11) is formed in the surface of one side of the outer shell (1) in a penetrating manner, the frame (9) is connected with the inner wall of the through groove (11) in a sliding manner, the improved structure of the automobile seat is characterized in that strips (12) are fixedly arranged on two sides of the top of the outer shell (1), sliding grooves (13) are formed in two sides of the bottom of the shell cover (2), the strips (12) are connected with the sliding grooves (13) in a sliding manner, first rack plates (14) are fixedly arranged on two sides of the bottom of the shell cover (2), a driving rod (15) is rotatably connected to the other side of the inner part of the outer shell (1), positioning mechanisms (16) are arranged inside and outside the outer shell (1), driving gears (17) are sleeved on two sides of the surface of the driving rod (15), the driving gears (17) are meshed with the first rack plates (14), first conical gears (18) are fixedly arranged at two ends of the driving rod (15), transmission rods (19) are rotatably connected to two sides of the outer shell (1), and transmission gears (20) are sleeved on two sides of the surface of the transmission rods (19), the fixed second bevel gear (21) that is provided with of one end of transfer line (19), and first bevel gear (18) and second bevel gear (21) intermeshing, the both sides of lifter plate (23) all fix and are provided with second rack board (22), and drive gear (20) and second rack board (22) intermeshing.

2. A protection type optical fiber sensor for laser according to claim 1, characterized in that the positioning mechanism (16) comprises a rubber ring (161), a threaded sleeve (162) and a positioning bolt (163), the threaded sleeve (162) is disposed on the surface of the outer casing (1) in a penetrating manner, the positioning bolt (163) is in threaded connection with the inner wall of the threaded sleeve (162), and the rubber ring (161) is fixedly disposed on the surface of the driving rod (15).

3. A protection type optical fiber sensor for laser according to claim 2, characterized in that a knob (164) is fixedly arranged at one end of the positioning bolt (163) far away from the rubber ring (161), and the outer diameter of the knob (164) is larger than the inner diameter of the threaded sleeve (162).

4. The protection type optical fiber sensor for the laser according to claim 1, wherein the two sides of the bottom of the lifting plate (23) are both fixedly provided with a movable plate (28), the two sides of the inner wall of the outer shell (1) are both provided with a movable groove (29), and the movable plates (28) are slidably connected with the inner wall of the movable grooves (29).

5. A protected fiber sensor for laser according to claim 4, characterized in that the movable plate (28) is L-shaped, and the height of the vertical slot (24) is the same as the height of the inner wall of the outer housing (1).

6. The protection type optical fiber sensor for the laser according to claim 1, wherein a vertical groove (24) is arranged on one side of the outer shell (1) in a penetrating manner, a blocking block (25) is fixedly arranged on the surface of the probe end body (4), and the blocking block (25) is connected with the inner wall of the vertical groove (24) in a sliding manner.

7. The protection type optical fiber sensor for the laser according to claim 1, wherein a concave groove (30) is formed in the top of the outer shell (1) and located on one side of the vertical groove (24), and the first rack plate (14) is in sliding connection with the inner wall of the concave groove (30).

8. A protective optical fiber sensor for laser according to claim 1, characterized in that a rotating plate (26) is rotatably connected to one side of the outer housing (1), and a handle (27) is fixedly arranged on one side of the frame (9).

9. A protected fiber sensor for laser according to claim 1, wherein the length of the strip (12) is the same as the length of the outer housing (1), the whole strip (12) is T-shaped, and the shape of the inner wall of the sliding groove (13) is similar to the shape of the strip (12).

10. A protected fiber sensor for laser according to claim 1, wherein the first bevel gears (18) at both ends of the driving rod (15) have the same size, and the first bevel gears (18) and the second bevel gears (21) have the same size.