Sealing and fixing device for optical fiber sensor

Abstract

The utility model relates to the technical field of optical fiber sensor protection, and discloses a sealing and fixing device for an optical fiber sensor, which comprises a sealing pipe fitting, a fixing device arranged on the surface of the sealing pipe fitting, and an auxiliary dustproof device arranged on the surface of the fixing device. The fixing device comprises a surface connecting piece, a top plate, a fixing bolt, a connecting block, a first locking clamping piece, a spring piece and a second locking clamping piece, and the surface connecting piece is fixedly connected to the surface of the sealing pipe fitting. According to the sealing and fixing device for the optical fiber sensor, through the arrangement of the fixing device, when the fixing bolt rotates and compresses an optical cable, a second locking clamping piece can be gradually attached to the optical cable under the action of a spring piece, the second locking clamping piece and the fixing bolt jointly form clamping force on the optical cable, and the material of the fixing bolt has certain elasticity and abrasion resistance; according to the utility model, a plurality of bolts are adopted to ensure that a good clamping effect can still be kept in long-time use, and the pressing point positions are not single any more and are not easy to slip off to influence the fixing effect and the use effect.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber sensor protection, in particular to a sealing and fixing device for an optical fiber sensor. Background Art

[0002] As a device that converts optical signals into electrical signals for measurement and transmission, optical fiber sensors have the advantages of high sensitivity, strong anti-electromagnetic interference ability, water resistance, high temperature resistance, etc., and are widely used in industrial automation, aerospace, petrochemical and other fields. However, in actual use, the fixation and sealing of optical fiber sensors have always been the key factors restricting their performance stability and service life.

[0003] The prior art discloses a sealing and fixing device for an optical fiber sensor with a bulletin number of CN215832740U, which includes an optical cable locking device, a flexible connector, a primary sensor cavity, a secondary sensor cavity, an optical fiber fusion pipe and an optical cable, wherein one end of the primary sensor cavity and the opposite end of the secondary sensor cavity are respectively threadedly connected to the two ends of the flexible connector. The sealing and fixing device for an optical fiber sensor achieves the goal of threaded connection of all components of the structure by setting an optical cable locking device, a flexible connector, a primary sensor cavity, a secondary sensor cavity, an optical fiber fusion pipe and an optical cable, which has both sealing performance and high connection strength. At the same time, when fixing the optical cables at both ends, a mechanical extrusion method is adopted, which has high tensile strength, low price, simple structure, convenient operation, strong versatility, good sealing effect, high connection strength and small space occupation.

[0004] However, the above-mentioned sealing and fixing device for optical fiber sensors achieves the goal that all components of this structure are connected by threads by arranging an optical cable locking device, a flexible connector, a primary sensor cavity, a secondary sensor cavity, an optical fiber fusion tube and an optical cable, which has both sealing performance and high connection strength. However, the above-mentioned sealing and fixing device uses a sensor to detect the sealing strength when limiting the position, and then uses bolts to press it together, but only one bolt is used, and the pressing point is single and located at the top. The bottom is easy to slip during long-term use and affects the fixation, and the effect during use is not good, which needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a sealing and fixing device for an optical fiber sensor to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the utility model provides the following technical solutions: a sealing fixing device for an optical fiber sensor, comprising a sealing tube, a fixing device is arranged on the surface of the sealing tube, and an auxiliary dustproof device is arranged on the surface of the fixing device.

[0007] The fixing device includes a surface connector, a top plate, a fixing bolt, a connecting block, a first locking clip, a spring sheet and a second locking clip. The surface connector is fixedly connected to the surface of the sealing pipe, the top plate is fixedly connected to the surface of the surface connector, a threaded groove is provided inside the top plate, the fixing bolt is threadedly connected to the inside of the top plate, the connecting block is fixedly connected to the bottom of the fixing bolt, the first locking clip is fixedly connected to the bottom of the connecting block, the spring sheet is fixedly connected to the bottom of the first locking clip, and the second locking clip is fixedly connected to the bottom of the spring sheet.

[0008] Preferably, the auxiliary dustproof device includes a surface ring plate, an arc-shaped mounting plate, a connecting plate, a column rod, a connecting ball, a mounting screw, a pressure plate and a dust cover, the surface ring plate is fixedly connected to the front side of the surface connecting part, the arc-shaped mounting plate is fixedly connected to the surface of the surface ring plate, and the pressure plate is fixedly connected to the bottom of the mounting screw.

[0009] Preferably, the connecting plate is fixedly connected to the side of the column rod, and the mounting screw is threadedly connected to the inside of the column rod connecting plate.

[0010] Preferably, the number of the fixing bolts, the connecting block, the first locking clip and the spring sheet are all three, and the three fixing bolts, the connecting block, the first locking clip and the spring sheet are evenly spaced and distributed on the surface of the surface connector.

[0011] Preferably, the dust cover is inserted into the inside of the surface ring plate, and the pressure plate is connected to the top of the dust cover.

[0012] Preferably, the number of the first locking clip, the spring sheet and the second locking clip is three, and the three first locking clips, the spring sheet and the second locking clips are distributed in a ring shape with equal intervals inside the sealing tube. When the fixing bolt rotates and presses the optical cable, the second locking clip will gradually fit the optical cable under the action of the spring sheet, and form a clamping force on the optical cable together with the fixing bolt, thereby ensuring that a good clamping effect can be maintained during long-term use.

[0013] Preferably, the connecting sphere is fixedly connected to the top of the arc-shaped placement plate, and the column rod is fixedly connected to the top of the connecting sphere.

[0014] Preferably, the fixing device and the auxiliary dust-proof device are symmetrically distributed at the front and rear ends of the sealing pipe. The fixing devices arranged at the front and rear ends can increase the contact area during clamping, increase the clamping strength, and avoid loosening during use to cause damage to the internal optical fiber sensor.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The sealing fixing device for the optical fiber sensor is provided with a fixing device. When the fixing bolt rotates and presses the optical cable, the second locking clip will gradually fit the optical cable under the action of the spring sheet, and together with the fixing bolt, form a clamping force on the optical cable. The material of the fixing bolt has certain elasticity and wear resistance to ensure that a good clamping effect can be maintained during long-term use. Multiple bolts are used, and the pressing point is no longer single, which is not easy to slip and affect the fixation, and the effect is good during use.

[0017] 2. The sealing and fixing device for the optical fiber sensor is provided with an auxiliary dustproof device. The dust cover is inserted into the surface ring plate, and then the installation screw is also turned to drive the pressure plate to move downward to press the dust cover, so that the device can be provided with a dust cover for covering the slot and preventing dust, moisture and other pollutants from entering the interior of the device. The dust cover adopts a detachable design, which is convenient for users to open or close when installing and maintaining the optical cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model when viewed from above;

[0019] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 3 This is a schematic diagram of the overall three-dimensional front view structure of the utility model;

[0021] Figure 4 For this utility model Figure 3 Enlarged structural diagram at B in the middle.

[0022] In the figure: 1. Sealing pipe fitting; 2. Fixing device; 201. Surface connecting piece; 202. Top plate; 203. Fixing bolt; 204. Connecting block; 205. First locking clip; 206. Spring sheet; 207. Second locking clip; 3. Auxiliary dustproof device; 301. Surface ring plate; 302. Arc placement plate; 303. Connecting plate; 304. Column rod; 305. Connecting ball; 306. Mounting screw; 307. Pressing plate; 308. Dust cover. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4, the utility model provides the following technical solutions:

[0025] A sealing fixing device for an optical fiber sensor comprises a sealing pipe 1, a fixing device 2 is arranged on the surface of the sealing pipe 1, and an auxiliary dustproof device 3 is arranged on the surface of the fixing device 2.

[0026] The fixing device 2 includes a surface connector 201, a top plate 202, a fixing bolt 203, a connecting block 204, a first locking clip 205, a spring sheet 206 and a second locking clip 207. The surface connector 201 is fixedly connected to the surface of the sealing pipe 1, the top plate 202 is fixedly connected to the surface of the surface connector 201, a threaded groove is provided inside the top plate 202, the fixing bolt 203 is threadedly connected to the inside of the top plate 202, the connecting block 204 is fixedly connected to the bottom of the fixing bolt 203, the first locking clip 205 is fixedly connected to the bottom of the connecting block 204, the spring sheet 206 is fixedly connected to the bottom of the first locking clip 205, and the second locking clip 207 is fixedly connected to the bottom of the spring sheet 206. The fixing device 2 and the auxiliary dustproof device 3 are symmetrically distributed at the front and rear ends of the sealing pipe 1. The fixing devices 2 arranged at the front and rear ends can increase the connection when clamping. The contact area can increase the clamping strength and avoid damage to the internal optical fiber sensor caused by loosening during use. The number of fixing bolts 203, connecting blocks 204, first locking clips 205 and spring sheets 206 are all three. The three fixing bolts 203, connecting blocks 204, first locking clips 205 and spring sheets 206 are evenly distributed on the surface of the surface connector 201. The number of the first locking clips 205, spring sheets 206 and second locking clips 207 is three. The three first locking clips 205, spring sheets 206 and second locking clips 207 are evenly distributed in a ring shape inside the sealing tube 1. When the fixing bolt 203 rotates and presses the optical cable, the second locking clip 207 will gradually fit the optical cable under the action of the spring sheet, and together with the fixing bolt 203, form a clamping force on the optical cable, which can ensure that a good clamping effect can be maintained during long-term use.

[0027] The auxiliary dustproof device 3 includes a surface ring plate 301, an arc-shaped placement plate 302, a connecting plate 303, a column rod 304, a connecting ball 305, a mounting screw 306, a pressure plate 307 and a dust cover 308. The surface ring plate 301 is fixedly connected to the front of the surface connecting member 201, the arc-shaped placement plate 302 is fixedly connected to the surface of the surface ring plate 301, the pressure plate 307 is fixedly connected to the bottom of the mounting screw 306, the connecting plate 303 is fixedly connected to the side of the column rod 304, the mounting screw 306 is threadedly connected to the inside of the column rod connecting plate 303, the dust cover 308 is plugged into the inside of the surface ring plate 301, the pressure plate 307 is connected to the top of the dust cover 308, the connecting ball 305 is fixedly connected to the top of the arc-shaped placement plate 302, and the column rod 304 is fixedly connected to the top of the connecting ball 305.

[0028] When in use, insert the optical fiber sensor to be sealed into the sealing tube 1, push it inward until the optical fiber sensor is completely inserted into the sealing tube 1, and then hold the fixing bolt 203 and twist it, driving the bottom connecting block 204, the first locking clip 205, the spring sheet 206 and the second locking clip 207 to move toward the direction close to the internal optical fiber sensor, and continue to move until it contacts the surface of the optical fiber sensor, and contacts from three directions. Continue to twist to clamp it, and when the fixing bolt 203 rotates and presses the optical cable, the second locking clip 207 will gradually fit the optical cable under the action of the spring sheet, and together with the fixing bolt 203, form a clamping force on the optical cable. The material of the fixing bolt 203 has certain elasticity and wear resistance to ensure that it can maintain a good clamping effect during long-term use. Multiple bolts are used, and the pressing point is no longer single, and it is not easy to slip and affect the fixation. The effect is good during use, and an auxiliary dustproof device 3 is provided on the surface of the sealing pipe 1. When in use, the dust cover 308 can be inserted into the surface ring plate 301, and then the installation screw 306 is also turned to drive the pressure plate 307 to move downward to press the dust cover 308, so that the device can be provided with a dust cover for covering the slot and preventing dust, moisture and other pollutants from entering the interior of the device. The dust cover adopts a detachable design, which is convenient for users to open or close when installing and maintaining the optical cable.

[0029] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing and fixing device for an optical fiber sensor, comprising a sealing tube (1), characterized in that: The surface of the sealing pipe (1) is provided with a fixing device (2), and the surface of the fixing device (2) is provided with an auxiliary dustproof device (3); The fixing device (2) comprises a surface connecting piece (201), a top plate (202), a fixing bolt (203), a connecting block (204), a first locking clip (205), a spring sheet (206) and a second locking clip (207); the surface connecting piece (201) is fixedly connected to the surface of the sealing pipe (1); the top plate (202) is fixedly connected to the surface of the surface connecting piece (201); a thread groove is provided inside the top plate (202); the fixing bolt (203) is threadedly connected to the inside of the top plate (202); the connecting block (204) is fixedly connected to the bottom of the fixing bolt (203); the first locking clip (205) is fixedly connected to the bottom of the connecting block (204); the spring sheet (206) is fixedly connected to the bottom of the first locking clip (205); and the second locking clip (207) is fixedly connected to the bottom of the spring sheet (206).

2. A sealing and fixing device for an optical fiber sensor according to claim 1, characterized in that: The auxiliary dustproof device (3) comprises a surface ring plate (301), an arc-shaped placement plate (302), a connecting plate (303), a column rod (304), a connecting ball (305), a mounting screw (306), a pressure plate (307) and a dustproof cover (308); the surface ring plate (301) is fixedly connected to the front side of the surface connecting member (201); the arc-shaped placement plate (302) is fixedly connected to the surface of the surface ring plate (301); and the pressure plate (307) is fixedly connected to the bottom of the mounting screw (306).

3. A sealing and fixing device for an optical fiber sensor according to claim 2, characterized in that: The connecting plate (303) is fixedly connected to the side of the column rod (304), and the mounting screw (306) is threadedly connected to the inside of the column rod connecting plate (303).

4. A sealing and fixing device for an optical fiber sensor according to claim 1, characterized in that: The number of the fixing bolts (203), the connecting block (204), the first locking clip (205) and the spring sheet (206) is three, and the three fixing bolts (203), the connecting block (204), the first locking clip (205) and the spring sheet (206) are evenly spaced and distributed on the surface of the surface connector (201).

5. A sealing and fixing device for an optical fiber sensor according to claim 2, characterized in that: The dust cover (308) is inserted into the interior of the surface ring plate (301), and the pressure plate (307) is connected to the top of the dust cover (308).

6. A sealing and fixing device for an optical fiber sensor according to claim 1, characterized in that: The number of the first locking clip (205), the spring sheet (206) and the second locking clip (207) is three, and the three first locking clips (205), the spring sheet (206) and the second locking clip (207) are distributed in a ring-shaped manner at equal intervals inside the sealing pipe (1).

7. A sealing and fixing device for an optical fiber sensor according to claim 2, characterized in that: The connecting sphere (305) is fixedly connected to the top of the arc-shaped placement plate (302), and the column rod (304) is fixedly connected to the top of the connecting sphere (305).

8. A sealing and fixing device for an optical fiber sensor according to claim 2, characterized in that: The fixing device (2) and the auxiliary dust prevention device (3) are symmetrically distributed at the front and rear ends of the sealing pipe (1).

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