Protective device for oil gas concentration sensor

Abstract

The utility model relates to the technical field of petrochemical industry storage, in particular to a protection device for an oil gas concentration sensor, and aims to solve the problems that daily inspection and troubleshooting are difficult due to adoption of a non-linear assembly structure in related technologies, maintenance is insufficient, and the service life is short. And the normal operation and the data accuracy of the sensor are finally influenced. The protection device comprises a mounting frame, an airtight component and a waterproof component. The mounting frame comprises a fixing frame and a screw rod. The screw rod is sequentially inserted into the fixing frame, the anti-evaporation diaphragm, the airtight component, the elastic bearing plate and the waterproof component. According to the protection device, the screw is used as an installation reference, direct superposition assembly is adopted, complex cross connection is eliminated, and therefore the high efficiency of the assembly process is achieved. The technical problems that due to the fact that an existing protection device adopts a non-linear assembly structure, daily inspection and troubleshooting are difficult, maintenance is insufficient, and finally normal operation and data accuracy of a sensor are affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical storage, in particular to a protective device for an oil and gas concentration sensor. Background Art

[0002] External floating roof tanks are widely used to store volatile petroleum products. Due to oil and gas leakage issues in the primary and secondary containment areas, oil and gas concentration monitoring sensors must be installed to monitor oil and gas concentrations in real time, along with appropriate protective devices to protect the sensors. However, existing protective devices typically utilize a nonlinear assembly structure. The complex interconnections and reliance on multiple prior steps make the assembly process cumbersome and time-consuming. This not only increases worker workload but also complicates and increases the difficulty of daily inspections and troubleshooting. Furthermore, when installing the oil and gas concentration monitoring sensors, perforating the anti-evaporation diaphragm and elastic pressure plate compromises the original sealing performance, requiring additional sealing measures to restore the seal, further increasing the complexity of the structure. These cumulative factors lead to insufficient maintenance, ultimately impacting the proper functioning of the sensors and data accuracy.

[0003] Existing protective devices have technical problems due to the use of nonlinear assembly structures, which makes daily inspection and troubleshooting difficult, leading to insufficient maintenance and ultimately affecting the normal operation of sensors and data accuracy. Utility Model Content

[0004] The purpose of this utility model is to provide a protective device for an oil and gas concentration sensor to solve the technical problem in the related art that the nonlinear assembly structure makes daily inspection and troubleshooting difficult, which in turn leads to insufficient maintenance and ultimately affects the normal operation of the sensor and the accuracy of data. In order to solve the above technical problems, the technical solution provided by this utility model is:

[0005] The protective device provided by the utility model includes:

[0006] Mounting frame and sealing assembly. The mounting frame includes a fixing frame and a screw, and the oil and gas concentration sensor is mounted on the fixing frame. The sealing assembly includes an airtight component and a waterproof component. The fixing frame, anti-evaporation diaphragm, airtight component, elastic pressure plate, and waterproof component are all sleeved on the screw and abutted in sequence.

[0007] Specifically, the fixing frame includes a bracket and a locking buckle, and the locking buckle includes a baffle and a fixing buckle. The baffle is installed on the bracket, and the two ends of the fixing buckle are respectively engaged with the two baffles to form a receiving cavity. The receiving cavity is used to install the oil and gas concentration sensor (001).

[0008] Specifically, the screw rod is provided with a wire hole, and the transmission cable passes through the wire hole and is connected to the oil and gas concentration sensor.

[0009] Specifically, the mounting bracket further includes a positioning metal nut, and the fixing bracket further includes a protective cover. The protective cover and the positioning metal nut are both sleeved on the screw, and the positioning metal nut is used to abut the protective cover against the bracket. The protective cover forms an annular shield for the oil and gas concentration sensor.

[0010] Specifically, the airtight component includes an airtight rubber ring, an airtight rubber gasket, a first metal gasket and a first metal nut. The positioning metal nut, the airtight rubber ring, the anti-evaporation diaphragm, the anti-evaporation diaphragm, the first metal gasket and the first metal nut are abutted in sequence.

[0011] Specifically, the waterproof component includes a waterproof rubber gasket, a second metal gasket and a second metal nut. The first metal nut, the elastic pressure-bearing plate, the waterproof rubber gasket, the second metal gasket and the second metal nut are abutted in sequence.

[0012] Specifically, the mounting bracket further includes a waterproof nut, which is installed at an end of the screw rod away from the bracket and is used to seal the annular gap between the transmission cable and the wire hole.

[0013] Specifically, the plurality of locking buckles are evenly distributed along the length direction of the bracket.

[0014] Specifically, the bracket, the locking buckle and the protective cover are all made of polyetheretherketone.

[0015] Specifically, the oil and gas concentration sensor is configured as an optical fiber air chamber sensor, and the transmission cable is correspondingly configured as a sensor optical fiber.

[0016] Based on the above technical solutions, the beneficial effects of the present invention are analyzed as follows:

[0017] The utility model provides a protective device for an oil and gas concentration sensor, comprising:

[0018] Mounting frame and sealing assembly. The mounting frame includes a fixing frame and a screw, and the oil and gas concentration sensor is mounted on the fixing frame. The sealing assembly includes an airtight component and a waterproof component. The fixing frame, anti-evaporation diaphragm, airtight component, elastic pressure plate, and waterproof component are all sleeved on the screw and abutted in sequence.

[0019] In specific applications, to prevent the oil and gas concentration sensor from being squeezed by the movement of the floating roof, holes are drilled in the anti-evaporation diaphragm and the elastic pressure plate for installation. The oil and gas concentration sensor is installed in the accommodating cavity, and the screw is sequentially inserted into the fixing frame, the anti-evaporation diaphragm, the airtight member, the elastic pressure plate, and the waterproof member, securing them through abutment. The airtight member fits against the anti-evaporation diaphragm, restoring the airtight seal around the screw at the installation hole. The waterproof member fits against the elastic pressure plate, restoring the waterproof performance around the screw at the installation hole.

[0020] As can be seen, compared to existing technologies, this protective device uses the screw as the installation base and adopts direct stacking assembly, ensuring a linear assembly process. Each assembly operation relies on a single preceding step, eliminating multi-level assembly dependencies and complex cross-connections, thereby achieving a direct and efficient assembly process. This overcomes the technical problem of existing protective devices, which, due to their nonlinear assembly structure, make daily inspection and troubleshooting difficult, leading to insufficient maintenance and ultimately affecting the normal operation of the sensor and data accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the overall installation of the protective device provided in an embodiment of the utility model;

[0023] Figure 2 The overall structure of the protective device is shown in FIG. Figure 1 ;

[0024] Figure 3 It is a structural diagram of the fixed frame;

[0025] Figure 4 The overall structure of the protective device is shown in FIG. Figure 2 ;

[0026] Figure 5 The overall structure of the protective device is shown in FIG. Figure 3 .

[0027] icon:

[0028] 001, oil and gas concentration sensor; 002, anti-evaporation diaphragm; 003, elastic pressure plate; 004, transmission cable;

[0029] 100, mounting bracket; 110, fixing bracket; 101, accommodating chamber; 111, bracket; 112, locking buckle; 1121, baffle; 1122, fixing buckle; 113, protective cover; 120, screw; 102, wire hole; 130, positioning metal nut; 140, waterproof nut;

[0030] 200. Sealing assembly; 210. Airtight component; 211. Airtight rubber ring; 212. Airtight rubber gasket; 213. First metal gasket; 214. First metal nut; 220. Waterproof component; 221. Waterproof rubber gasket; 222. Second metal gasket; 223. Second metal nut. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0033] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0034] Existing protective devices have technical problems due to the use of nonlinear assembly structures, which makes daily inspection and troubleshooting difficult, leading to insufficient maintenance and ultimately affecting the normal operation of sensors and data accuracy.

[0035] In view of this, the present invention provides a protective device for an oil and gas concentration sensor, comprising:

[0036] Mounting frame 100 and sealing assembly 200. Mounting frame 100 includes a fixing frame 110 and a screw 120. Oil and gas concentration sensor 001 is mounted on fixing frame 110. Sealing assembly 200 includes an airtight component 210 and a waterproof component 220. Fixing frame 110, anti-evaporation diaphragm 002, airtight component 210, elastic pressure plate 003, and waterproof component 220 are all sleeved onto screw 120 and abutted in sequence.

[0037] Based on the above technical solutions, the protective device provided by the present invention can achieve the following technical effects:

[0038] This protective device uses screw 120 as the installation reference and employs direct stacking assembly, ensuring a linear assembly process. Each assembly operation relies solely on a single preceding step, eliminating multi-level assembly dependencies and complex cross-connections, resulting in a direct and efficient assembly process. This overcomes the technical issues of existing protective devices, which, due to their nonlinear assembly structure, make routine inspection and troubleshooting difficult, leading to insufficient maintenance and ultimately affecting the normal operation of the sensor and data accuracy.

[0039] The following combination Figures 1 to 5 The structure and shape of the protective device provided in this embodiment are described in detail:

[0040] Regarding the structural composition of the fixing frame 110, specifically:

[0041] Mounting bracket 110 includes a bracket 111 and a locking buckle 112. Locking buckle 112 includes a baffle 1121 and a fixing buckle 1122. Baffle 1121 is mounted on bracket 111. The ends of fixing buckle 1122 engage with two baffles 1121, forming a receiving cavity 101. The oil / gas concentration sensor 001 is mounted in receiving cavity 101 and secured by the circular enclosure formed by the two baffles 1121, fixing buckle 1122, and bracket 111.

[0042] In order to further enhance the fixing effect between the bracket 111 and the oil and gas concentration sensor 001 , in the solution of this embodiment, a plurality of locking buckles 112 are evenly distributed along the length direction of the bracket 111 and fix the oil and gas concentration sensor 001 .

[0043] The high viscosity of macromolecular hydrocarbons in crude oil easily combines with dust in the sealing area to form oil stains. This oil stain can clog the sensor and reduce monitoring accuracy. To reduce the accumulation of oil stains on the surface of the oil and gas concentration sensor 001, in this embodiment, the mounting bracket 100 also includes a positioning metal nut 130, and the fixing bracket 110 also includes a protective cover 113. Both the protective cover 113 and the positioning metal nut 130 are mounted on the screw 120, and the positioning metal nut 130 is used to abut the protective cover 113 against the bracket 111. The protective cover 113 forms an annular shield for the oil and gas concentration sensor 001, which is used to reduce the adhesion of oil stains on the surface of the oil and gas concentration sensor 001.

[0044] To accommodate the confined space within the primary and secondary sealing zones of an external floating roof tank, in this embodiment, screw 120 is provided with a cable hole 102, through which transmission cable 004 passes and connects to oil and gas concentration sensor 001. Integrating the cable hole 102 with screw 120 reduces space usage and minimizes damage to the original sealing structure.

[0045] In order to fill the water leakage points at the screw rod 120 caused by the wire hole 102, in the solution of this embodiment, the mounting frame 100 also includes a waterproof nut 140. The waterproof nut 140 is installed at the end of the screw rod 120 away from the bracket 111, and is used to seal the annular gap between the transmission cable 004 and the wire hole 102, thereby enhancing the waterproof performance at the wire hole 102.

[0046] Regarding the composition of the airtight member 210, specifically:

[0047] The airtight component 210 includes an airtight rubber ring 211, an airtight rubber gasket 212, a first metal gasket 213, and a first metal nut 214. The positioning metal nut 130, airtight rubber ring 211, anti-evaporation diaphragm 002, anti-evaporation diaphragm 002, first metal gasket 213, and first metal nut 214 are sequentially abutted to achieve a secure installation. The tight fit between the airtight rubber ring 211, anti-evaporation diaphragm 002, and airtight rubber gasket 212 restores the airtight seal around the screw 120 at the mounting hole.

[0048] Regarding the composition of the waterproof member 220, specifically:

[0049] Waterproof member 220 includes a waterproof rubber gasket 221, a second metal gasket 222, and a second metal nut 223. The first metal nut 214, the elastic pressure plate 003, the waterproof rubber gasket 221, the second metal gasket 222, and the second metal nut 223 are sequentially abutted to secure the assembly. The tight fit between the elastic pressure plate 003 and the waterproof rubber gasket 221 restores the waterproof performance of the screw 120 at the mounting hole.

[0050] Because the operating environment of an external floating roof tank is extremely harsh, including high temperatures, corrosive gases, mechanical vibration, and severe oil deposits, in this embodiment, the bracket 111, locking buckle 112, and protective cover 113 are all made of polyetheretherketone (PEEK). PEEK has the characteristics of thermal and chemical stability, high rigidity, high strength, high wear resistance, low friction coefficient, and flame retardancy.

[0051] Specifically, thermal stability, chemical stability, high stiffness, high strength and high wear resistance are used to adapt to the high temperature, corrosive gas and mechanical vibration environment in the external floating roof tank, and enhance the durability of the protective device; thermal stability, chemical stability and low friction coefficient are used to reduce the adhesion of oil substances, which can further reduce the adhesion of oil stains on the surface of the oil and gas concentration sensor 001; low friction coefficient and flame retardancy are used to reduce the risk of fire caused by friction with the metal inner wall of the tank during the operation of the external floating roof tank.

[0052] In this embodiment, the oil and gas concentration sensor 001 is configured as a fiber optic gas chamber sensor, and the transmission cable 004 is configured as a corresponding sensor fiber. The fiber optic gas chamber sensor can provide real-time monitoring of the propane and butane concentrations in the crude oil volatiles within the primary and secondary containment zones of an external floating roof tank. The fiber optic gas chamber sensor is connected to a monitoring host computer via the sensor fiber, which is connected to a display. When the sensor detects a concentration exceeding a threshold or a sensor failure, the monitoring host displays the alarm sensor's location and the monitored value.

[0053] In summary, the specific working process of the protection device provided in this embodiment is as follows:

[0054] Since the floating roof moves up and down during the use of the external floating roof tank, in order to prevent the installed oil and gas concentration sensor 001 from being squeezed and damaged by the movement of the floating roof, it is chosen to drill holes on the anti-evaporation diaphragm 002 and the elastic pressure plate 003 for installation.

[0055] To install the oil / gas concentration sensor 001 on the mounting bracket 100, first screw the screw 120 into the bracket 111, pass the transmission cable 004 through the cable hole 102 of the screw 120, then place the oil / gas concentration sensor 001 between the two side baffles 1121. Engage the two ends of the fixing buckle 1122 on the baffles 1121 to secure the oil / gas concentration sensor 001. Insert the protective cover 113 and the positioning metal nut 130 sequentially through the screw 120. The positioning metal nut 130 secures the protective cover 113 against the bracket 111.

[0056] When installing the fixing bracket 110 in the primary and secondary sealing areas of the external floating roof tank, first drill holes in the corresponding positions of the anti-evaporation diaphragm 002 and the elastic pressure plate 003, and install the oil and gas concentration sensor 001 together with the fixing bracket 110 from the inside of the primary and secondary sealing areas. Insert the end of the screw 120 away from the bracket 111 into the airtight rubber ring 211, the anti-evaporation diaphragm 002, the airtight rubber gasket 212 and the first metal gasket 213 in sequence, and screw in the first metal nut 214 to tighten and secure. Through the close fit of the airtight rubber ring 211, the anti-evaporation diaphragm 002 and the airtight rubber gasket 212, the airtight performance of the outer periphery of the screw 120 at the installation hole is restored. Then, insert the elastic pressure plate 003, the waterproof rubber gasket 221 and the second metal gasket 222 in sequence and screw in the second metal nut 223 to tighten and secure. The tight fit between elastic pressure plate 003 and waterproof rubber gasket 221 restores the waterproof performance of screw rod 120 at the installation hole. Finally, waterproof nut 140 is installed on the end of screw rod 120 away from bracket 111 and then sleeved over transmission cable 004, sealing the annular gap between transmission cable 004 and cable hole 102 and enhancing the waterproof performance of cable hole 102.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A protective device for an oil and gas concentration sensor, characterized in that: include: A mounting frame (100) and a sealing assembly (200); the mounting frame (100) comprises a fixing frame (110) and a screw (120), and an oil and gas concentration sensor (001) is mounted on the fixing frame (110); the sealing assembly (200) comprises an airtight component (210) and a waterproof component (220); the fixing frame (110), the anti-evaporation diaphragm (002), the airtight component (210), the elastic pressure-bearing plate (003) and the waterproof component (220) are all sleeved on the screw (120) and abutted in sequence.

2. The protective device according to claim 1, characterized in that: The fixing frame (110) includes a bracket (111) and a locking buckle (112); the locking buckle (112) includes a baffle (1121) and a fixing buckle (1122); the baffle (1121) is installed on the bracket (111), and the two ends of the fixing buckle (1122) are respectively engaged with the two baffles (1121) to form an accommodating cavity (101). The accommodating cavity (101) is used to install the oil and gas concentration sensor (001).

3. The protective device according to claim 2, characterized in that: The screw rod (120) is provided with a wire hole (102), and the transmission cable (004) passes through the wire hole (102) and is connected to the oil and gas concentration sensor (001).

4. The protective device according to claim 2, characterized in that: The mounting frame (100) further includes a positioning metal nut (130), and the fixing frame (110) further includes a protective cover (113). The protective cover (113) and the positioning metal nut (130) are both sleeved on the screw rod (120), and the positioning metal nut (130) is used to abut the protective cover (113) against the bracket (111); the protective cover (113) forms an annular shield for the oil and gas concentration sensor (001).

5. The protective device according to claim 2, characterized in that: The airtight component (210) comprises an airtight rubber ring (211), an airtight rubber gasket (212), a first metal gasket (213) and a first metal nut (214); the positioning metal nut (130), the airtight rubber ring (211), the anti-evaporation diaphragm (002), the anti-evaporation diaphragm (002), the first metal gasket (213) and the first metal nut (214) are abutted in sequence.

6. The protective device according to claim 4, characterized in that: The waterproof component (220) comprises a waterproof rubber gasket (221), a second metal gasket (222) and a second metal nut (223); the first metal nut (214), the elastic pressure-bearing plate (003), the waterproof rubber gasket (221), the second metal gasket (222) and the second metal nut (223) are abutted in sequence.

7. The protective device according to claim 5, characterized in that: The mounting frame (100) further comprises a waterproof nut (140), which is mounted on an end of the screw rod (120) away from the bracket (111) and is used to seal the annular gap between the transmission cable (004) and the wire hole (102).

8. The protective device according to claim 3, characterized in that: The plurality of locking buckles (112) are evenly distributed along the length direction of the bracket (111).

9. The protective device according to claim 4, characterized in that: The bracket (111), the locking buckle (112) and the protective cover (113) are all made of polyetheretherketone material.

10. The protective device according to claim 3, characterized in that: The oil and gas concentration sensor (001) is configured as an optical fiber air chamber type sensor, and the transmission cable (004) is correspondingly configured as a sensor optical fiber.

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