A distributed optical fiber vibration sensing data acquisition device

Abstract

The utility model discloses a kind of distributed optical fiber vibration sensing data acquisition equipment, it includes box, box top is equipped with protective shell, sensor body is equipped in box inner chamber bottom, sensor body side wall is equipped with optical cable, fixed assembly is equipped in the circumference outer wall of optical cable, box side wall is equipped with guide component, this kind of distributed optical fiber vibration sensing data acquisition equipment, will fixed seat install in the monitoring point on oil and gas pipeline, pull connecting plate and drive moving rod to move upwards, to make clamping plate move upwards and enter the inside of containing groove, rotate cover plate, after optical cable is inserted into fixed groove, turn back cover plate, loosen connecting plate, moving rod is driven to move downwards by the resilience of spring, to make clamping plate move downwards and connect optical cable, screw into first bolt connection fixed seat and cover plate, it is convenient to make optical cable installation more stable, avoid shaking influence optical fiber vibration sensing, secondly, optical cable is contacted and rubbed guide roller by guide component, drive guide roller to rotate, to avoid optical cable and edge rubbing damage.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber sensing technology, specifically to a distributed optical fiber vibration sensing data acquisition device. Background Technology

[0002] Distributed fiber optic sensing technology is an emerging sensing technology that uses monitoring optical cables laid in the same trench as pipelines as sensors. It makes full use of the continuous spatial distribution of optical fibers to realize physical parameter information at any point along the fiber distribution. It has the advantages of rich measurement information, accurate positioning, and intrinsic safety, and is suitable for applications in fields such as power, oil and petrochemical, transportation, bridges, and dams.

[0003] The prior art patent document CN218646442U discloses an optical fiber vibration sensing and detection device, including a base shell. The surface of the base shell has parallel dovetail grooves, and a dovetail strip is slidably inserted into the dovetail grooves. A limit tube and a detection rod located inside the limit tube are installed on the outer wall of the faceplate shell. A fiber optic grating is installed at the end of the detection rod. A sensor body and a cleaning component extending to the outside of the limit tube are installed on the surface of the base shell. The cleaning component can periodically extend and retract during use to spray water to clean the outer periphery of the optical cable, keeping the outer periphery of the fiber optic grating clean, thereby ensuring the detection effect of optical fiber vibration. The inclusion of the dovetail, faceplate, side plate, disassembly plate, dovetail grooves, and dovetail strips facilitates the installation of components inside the base shell and faceplate shell, making assembly and disassembly convenient and facilitating later maintenance.

[0004] Although the device has many beneficial effects, it still has the following problems: During the use of the device, the optical cable is relatively long, which is not convenient to distribute and install at the monitoring points, affecting vibration sensing detection; secondly, the optical cable is prone to wear due to friction with the edge of the limiting tube during installation, which needs to be improved. In view of this, we propose a distributed optical fiber vibration sensing data acquisition device. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] 1. Technical problems to be solved:

[0007] To address the issues mentioned above, such as the long optical cable being inconvenient to distribute and install at monitoring points, affecting vibration sensing detection, and the wear caused by friction between the optical cable and the edge of the limiting tube during installation, this utility model is proposed.

[0008] Therefore, the purpose of this utility model is to provide a distributed optical fiber vibration sensing data acquisition device, which facilitates the distribution and installation of optical cables at various monitoring points, makes optical fiber vibration sensing detection convenient, facilitates the guidance of optical cables, and avoids wear during installation.

[0009] 2. Technical Solution:

[0010] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0011] A distributed fiber optic vibration sensing data acquisition device includes a housing with a protective shell on top. A sensor body is located at the bottom of the housing's inner cavity. An optical cable is mounted on the side wall of the sensor body. A fixing assembly is located on the outer circumference of the optical cable. The fixing assembly includes a fixing seat with a fixing groove on its top. A connecting rod is located on one side of the top of the fixing seat. A cover plate is rotatably connected to the outer circumference of the connecting rod. Multiple first bolts are threaded onto one side of the top of the cover plate. Two receiving grooves are located at the bottom of the cover plate. A connecting plate is located on the top of the cover plate. Multiple moving rods are located at the bottom of the connecting plate. A retaining plate is slidably connected to the receiving groove at the bottom of the moving rod. A spring is fitted onto the outer circumference of the moving rod at the top of the retaining plate. A guiding assembly is located on the side wall of the housing. The retaining plate moves downwards to abut the optical cable, facilitating the adaptation of optical cables of different sizes.

[0012] In a preferred embodiment of the distributed fiber optic vibration sensing data acquisition device of this utility model, the guiding component includes a first guiding ring with positioning blocks on both sides of its top. A second guiding ring is located at the bottom of the protective shell's sidewall, with positioning grooves on both sides of its bottom. Multiple mounting grooves are formed on the inner circumference of both the first and second guiding rings, and guide rollers are rotatably connected to the sidewalls of these mounting grooves. The guiding ring is divided into two parts for convenient installation of optical cables, allowing for direct installation without insertion.

[0013] In a preferred embodiment of the distributed fiber optic vibration sensing data acquisition device of this utility model, both of the card plates have a pad at their bottom, and the pad is made of silicone rubber. Silicone rubber is weather-resistant, preventing outdoor environments from affecting the use of the pad.

[0014] In a preferred embodiment of the distributed optical fiber vibration sensing data acquisition device of this utility model, the top of the connecting plate is provided with a handle, and the size and position of the card plate are matched with the size and position of the optical cable.

[0015] In a preferred embodiment of the distributed fiber optic vibration sensing data acquisition device of this utility model, the bottom of the fixed base is provided with a fixed plate, and rotating plates are rotatably connected to both side walls of the fixed plate. Magnetic plates are provided at the bottom of both the fixed plate and the rotating plates.

[0016] In a preferred embodiment of the distributed fiber optic vibration sensing data acquisition device of this utility model, the size and position of the positioning block match the size and position of the positioning groove, and the height of the guide roller is higher than the top of the mounting groove.

[0017] As a preferred embodiment of the distributed optical fiber vibration sensing data acquisition device of this utility model, the bottom of both sides of the protective shell is provided with multiple mounting plates, and the side walls of the multiple mounting plates are threaded with second bolts.

[0018] 3. Beneficial effects:

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This distributed fiber optic vibration sensing data acquisition device involves installing a fixed base at a monitoring point on an oil and gas pipeline. Pulling the connecting plate moves the moving rod upward, causing the clamping plate to move upward into the receiving slot. Rotating the cover plate allows the optical cable to be inserted into the fixed slot, and then rotating the cover plate back. Loosening the connecting plate allows the spring's rebound force to move the moving rod downward, causing the clamping plate to move downward and engage the optical cable. Tightening the first bolt connects the fixed base and the cover plate, making the optical cable installation more stable and preventing shaking from affecting the acquisition of fiber optic vibration sensing data.

[0021] This distributed fiber optic vibration sensing data acquisition device places the optical cable inside the first guide ring and then covers it with a protective shell. The positioning block is inserted into the positioning slot to facilitate the splicing of the first guide ring and the second guide ring. When installing the optical cable, the optical cable contacts and rubs against the guide roller, causing the guide roller to rotate, thereby avoiding damage to the optical cable from friction with the edge. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0023] Figure 1 This is a schematic diagram of the overall structure of a distributed fiber optic vibration sensing data acquisition device according to the present invention.

[0024] Figure 2 This is a schematic diagram showing the disassembled structure of the fixed component of a distributed fiber optic vibration sensing data acquisition device according to this utility model.

[0025] Figure 3 This is a cross-sectional schematic diagram of the fixed component structure of a distributed optical fiber vibration sensing data acquisition device according to the present invention.

[0026] Figure 4 This is a schematic diagram of the fixed component structure of a distributed fiber optic vibration sensing data acquisition device according to the present invention;

[0027] Figure 5 This is a schematic diagram showing the disassembled structure of the guide component of a distributed optical fiber vibration sensing data acquisition device according to this utility model.

[0028] The following are the labeling symbols in the diagram: 1. Housing; 2. Protective shell; 3. Sensor body; 4. Optical cable; 5. Fixing assembly; 6. Guiding assembly; 7. Mounting plate; 8. Second bolt; 9. Handle; 501. Fixing base; 502. Fixing groove; 503. Connecting rod; 504. Cover plate; 505. First bolt; 506. Receiving groove; 507. Connecting plate; 508. Moving rod; 509. Clamping plate; 510. Spring; 511. Pad; 512. Handle; 513. Fixing plate; 514. Rotating plate; 515. Magnetic plate; 601. First guide ring; 602. Positioning block; 603. Second guide ring; 604. Positioning groove; 605. Mounting groove; 606. Guide roller. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0030] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0031] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0034] This utility model provides an overall structural schematic diagram of an embodiment of a distributed fiber optic vibration sensing data acquisition device, including:

[0035] Please see Figures 1-5 This embodiment of a distributed fiber optic vibration sensing data acquisition device includes a housing 1, with a protective shell 2 threadedly connected to the top of the housing 1. A sensor body 3 is fixedly mounted at the bottom of the inner cavity of the housing 1, and an optical cable 4 is fixedly mounted on the side wall of the sensor body 3. A fixing component 5 is snapped onto the outer circumference of the optical cable 4. The fixing component 5 includes a fixing seat 501, a fixing groove 502 on the top of the fixing seat 501, a connecting rod 503 fixedly mounted on one side of the top of the fixing seat 501, a cover plate 504 rotatably connected to the outer circumference of the connecting rod 503, a plurality of first bolts 505 threadedly connected to one side of the top of the cover plate 504, two receiving grooves 506 on the bottom of the cover plate 504, a connecting plate 507 fixedly mounted on the top of the cover plate 504, a plurality of moving rods 508 fixedly mounted on the bottom of the connecting plate 507, and a fixing rod 508 fixedly mounted on the bottom of the moving rods 508. A clamping plate 509 is slidably connected to the receiving groove 506. A spring 510 is sleeved on the outer circumference of the moving rod 508 and located at the top of the clamping plate 509. A guide assembly 6 is welded to the side wall of the housing 1. The fixed seat 501 is installed on the monitoring point on the oil and gas pipeline. Pulling the connecting plate 507 drives the moving rod 508 to move upward, thereby moving the clamping plate 509 upward into the receiving groove 506. Rotate the cover plate 504, insert the optical cable 4 into the fixed groove 502, and then rotate the cover plate 504 back. Release the connecting plate 507. The spring 510's rebound force drives the moving rod 508 to move downward, thereby moving the clamping plate 509 downward to clamp the optical cable 4. Tighten the first bolt 505 to connect the fixed seat 501 and the cover plate 504, which makes the installation of the optical cable 4 more stable and avoids shaking from affecting the acquisition of fiber optic vibration sensing data.

[0036] It is worth noting that, in order to avoid wear and tear on the optical cable 4 during installation, the guiding component 6 specifically includes a first guiding ring 601, with positioning blocks 602 fixed on both sides of the top of the first guiding ring 601, and a second guiding ring 603 fixed on the bottom of the side wall of the protective shell 2. Positioning grooves 604 are opened on both sides of the bottom of the second guiding ring 603. Multiple installation grooves 605 are opened on the inner circumference of the first guiding ring 601 and the second guiding ring 603. Guide rollers 606 are rotatably connected to the side walls of the multiple installation grooves 605. After the optical cable 4 is placed in the first guiding ring 601, the protective shell 2 is covered, and the positioning blocks 602 are inserted into the positioning grooves 604 to facilitate the splicing of the first guiding ring 601 and the second guiding ring 603. When installing the optical cable 4, the optical cable 4 contacts and rubs against the guide rollers 606, causing the guide rollers 606 to rotate, thereby avoiding damage to the optical cable 4 from friction with the edges.

[0037] Next, in order to prevent damage to the optical cable 4, specifically, a pad 511 is fixed to the bottom of both clamping plates 509. The pad 511 is made of silicone rubber. The silicone rubber pad 511 prevents excessive pressure on the optical cable 4, which could cause damage.

[0038] Meanwhile, to facilitate the use by staff, a handle 512 is fixed on the top of the connecting plate 507, and the size and position of the clamping plate 509 match the size and position of the optical cable 4. The handle 512 makes it easy for staff to pull the connecting plate 507, and the clamping plate 509, which matches the size and position of the optical cable 4, makes it easier to clamp the optical cable 4 more tightly.

[0039] Furthermore, to facilitate the installation of the fixing component 5 on the oil and gas pipeline, specifically, a fixing plate 513 is fixedly provided at the bottom of the fixing base 501, and a rotating plate 514 is rotatably connected to both side walls of the fixing plate 513. A magnetic plate 515 is fixedly provided at the bottom of both the fixing plate 513 and the rotating plate 514. The rotating plate 514 can be rotated to adapt to different sizes of oil and gas pipelines, and the magnetic plate 515 can be used to attract oil and gas pipelines for easy installation.

[0040] It is worth noting that, in order to facilitate the guidance of the optical cable 4, the size and position of the positioning block 602 are matched with the size and position of the positioning groove 604, and the height of the guide roller 606 is higher than the top of the mounting groove 605. The positioning block 602, which matches the size and position of the positioning groove 604, makes it easier to make the splicing of the first guide ring 601 and the second guide ring 603 more stable. The guide roller 606, which is higher than the top of the mounting groove 605, makes it easier for the guide roller 606 to abut against the guiding optical cable 4.

[0041] Finally, to facilitate the splicing of the housing 1 and the protective shell 2, specifically, multiple mounting plates 7 are welded to the bottom of both side walls of the protective shell 2, and the side walls of the multiple mounting plates 7 are threaded with second bolts 8. The housing 1 is connected by screwing the second bolts 8 into the mounting plates 7, thereby making the splicing of the housing 1 and the protective shell 2 more stable.

[0042] Combination Figures 1-5 The specific usage process of the distributed fiber optic vibration sensing data acquisition device of this embodiment is as follows:

[0043] 1: When this device is needed for distributed fiber optic vibration sensing data acquisition, install the fixed base 501 at the monitoring point on the oil and gas pipeline, pull the connecting plate 507 to move the moving rod 508 upward, so that the clamping plate 509 moves upward into the receiving groove 506, rotate the cover plate 504, insert the optical cable 4 into the fixed groove 502 and then turn the cover plate 504 back, release the connecting plate 507, the rebound force of the spring 510 drives the moving rod 508 downward, so that the clamping plate 509 moves downward to clamp the optical cable 4, and screw in the first bolt 505 to connect the fixed base 501 and the cover plate 504;

[0044] 2: After placing the optical cable 4 inside the first guide ring 601, cover it with the protective shell 2. Insert the positioning block 602 into the positioning groove 604 to splice the first guide ring 601 and the second guide ring 603. The optical cable 4 contacts and rubs against the guide roller 606, causing the guide roller 606 to rotate to prevent wear.

[0045] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A distributed fiber optic vibration sensing data acquisition device, characterized in that, The device includes a housing (1), a protective shell (2) on the top of the housing (1), a sensor body (3) at the bottom of the inner cavity of the housing (1), an optical cable (4) on the side wall of the sensor body (3), a fixing component (5) on the outer circumference of the optical cable (4), the fixing component (5) including a fixing seat (501), a fixing groove (502) on the top of the fixing seat (501), a connecting rod (503) on one side of the top of the fixing seat (501), and a cover plate (504) rotatably connected to the outer circumference of the connecting rod (503). (504) The top side is threaded with multiple first bolts (505), the bottom of the cover plate (504) has two receiving grooves (506), the top of the cover plate (504) is provided with a connecting plate (507), the bottom of the connecting plate (507) is provided with multiple moving rods (508), the bottom of the moving rod (508) is provided with a card plate (509) that is slidably connected to the receiving groove (506), the outer circumference of the moving rod (508) is fitted with a spring (510) located on the top of the card plate (509), and the side wall of the box (1) is provided with a guide assembly (6).

2. The distributed optical fiber vibration sensing data acquisition device according to claim 1, characterized in that, The guiding component (6) includes a first guiding ring (601), with positioning blocks (602) on both sides of the top of the first guiding ring (601). A second guiding ring (603) is provided at the bottom of the side wall of the protective shell (2). Positioning grooves (604) are provided on both sides of the bottom of the second guiding ring (603). Multiple mounting grooves (605) are provided on the inner circumference of the first guiding ring (601) and the second guiding ring (603). Guide rollers (606) are rotatably connected to the side walls of the multiple mounting grooves (605).

3. The distributed optical fiber vibration sensing data acquisition device according to claim 2, characterized in that, Both of the card plates (509) have a pad (511) at the bottom, and the pad (511) is made of silicone rubber.

4. The distributed optical fiber vibration sensing data acquisition device according to claim 3, characterized in that, The top of the connecting plate (507) is provided with a handle (512), and the size and position of the card plate (509) match the size and position of the optical cable (4).

5. The distributed optical fiber vibration sensing data acquisition device according to claim 4, characterized in that, The bottom of the fixed base (501) is provided with a fixed plate (513), and the two side walls of the fixed plate (513) are rotatably connected with rotating plates (514). The bottom of the fixed plate (513) and the rotating plates (514) are both provided with magnetic plates (515).

6. The distributed optical fiber vibration sensing data acquisition device according to claim 5, characterized in that, The size and position of the positioning block (602) match the size and position of the positioning groove (604), and the height of the guide roller (606) is higher than the top of the mounting groove (605).

7. The distributed optical fiber vibration sensing data acquisition device according to claim 6, characterized in that, The protective shell (2) has multiple mounting plates (7) at the bottom of both side walls, and the side walls of the multiple mounting plates (7) are threaded with second bolts (8).

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