An explosion-proof junction box with cable temperature fiber grating temperature sensing device

Abstract

This utility model relates to the field of explosion-proof junction box technology and discloses an explosion-proof junction box with a cable temperature fiber optic grating temperature sensing device, which solves the problem of unstable connection between the box cover and the box body. It includes a box body, with a box cover on the top. A connecting mechanism is provided between the box cover and the box body. The connecting mechanism includes an outer frame fixed to the outside of the box body. Two positioning posts and two positioning plates are symmetrically fixedly connected to the top of the outer frame. The box cover is movably sleeved on the outside of the two positioning posts and two positioning plates. Two top frames are symmetrically fixedly connected to the top of the box cover, and each top frame is sleeved on the outside of the two positioning plates. A U-shaped round rod is fixedly connected between the two top frames. This utility model, through the cooperation of the guide rod, guide plate, insert plate, slot, movable rod, lifting plate, U-shaped round rod, screw, and screw cylinder, can re-fix the box cover, thereby ensuring the stability of the connection between the box cover and the box body.

Description

Technical Field

[0001] This utility model belongs to the technical field of explosion-proof junction boxes, specifically an explosion-proof junction box with a cable temperature fiber optic grating temperature sensing device. Background Technology

[0002] Explosion-proof junction boxes are special power distribution equipment used in various high-risk locations. An explosion is a process in which a substance undergoes a physical or chemical change, rapidly transforming from one state to another and releasing a large amount of energy. When an explosive substance mixes with oxygen in the air, and the concentration is within the explosive limit range, an explosion will occur if an ignition source is present. According to the patent document with authorization announcement number CN219513736U, entitled "A Structure of an Explosion-proof Junction Box," it includes: a top cover mechanism, which includes a handle, with the lower end of the handle fixedly connected to the top cover, and the lower end of the top cover having a groove. The lower end of the top cover mechanism is fixedly connected to a box mechanism, which includes a box body. The outer wall of the box body has a slot, and the upper end of the box body is fixedly connected to a sealing ring. Both sides of the box body are fixedly connected to wiring conduits, and the outer wall of the wiring conduits has connecting threads, with nuts threaded onto the outer wall of the connecting threads. However, the following defects still exist:

[0003] It uses a spring structure to connect the lid to the box body. Because the spring has elasticity, the connection between the lid and the box body is prone to instability. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides an explosion-proof junction box with a cable temperature fiber optic grating temperature sensing device, which effectively solves the problem of unstable connection between the box cover and the box body.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof junction box with a cable temperature fiber optic grating temperature sensing device, comprising a box body, a box cover on the top of the box body, and a connecting mechanism between the box cover and the box body;

[0006] The connecting mechanism includes an outer frame fixed to the outside of the box body. Two positioning posts and two positioning plates are symmetrically fixedly connected to the top of the outer frame. The box cover is movably fitted onto the outside of the two positioning posts and two positioning plates. Two top frames are symmetrically fixedly connected to the top of the box cover. The two top frames are respectively fitted onto the outside of the two positioning plates. A U-shaped round rod is fixedly connected between the two top frames. A sliding plate is movably fitted onto the outside of the U-shaped round rod. Springs are fixedly connected between the two top frames and the sliding plate. The two springs are fitted onto the outside of the U-shaped round rod. Two insert rods are symmetrically fixedly connected to the outside of the sliding plate. Side rings are fixedly connected to the side of the two side rings closest to the sliding plate. The two insert rods are respectively inserted into the two side rings. A guide rod is fixedly connected to the sliding plate. Two guide plates are symmetrically movably fitted onto the outside of the guide rod. Insert plates are fixedly connected to the side of the two guide plates that are far apart from each other. Slots are provided on the side of the two positioning plates that are close to each other. The two insert plates are respectively inserted into the two slots.

[0007] Preferably, the slide plate is provided with a guide groove, and both guide plates are slidably connected to the guide groove.

[0008] Preferably, a U-shaped rod is fixedly connected to the outer side of the slide plate, and a lifting plate is movably sleeved on the outer side of the U-shaped rod. Two movable rods are symmetrically rotatably connected to the outer side of the lifting plate, and the ends of the two movable rods away from the lifting plate are respectively rotatably connected to two guide plates.

[0009] Preferably, a sleeve plate is fixedly sleeved on the outer side of the second U-shaped rod, a lower rubber ring is fixedly connected to the bottom of the lifting plate, the lower rubber ring abuts against the top of the sleeve plate, a screw is fixedly connected to the top of the sleeve plate, and the lifting plate is located outside the screw and does not contact the screw.

[0010] Preferably, a screw cylinder is threaded onto the outer side of the screw, a handwheel is fixedly connected to the top of the screw cylinder, and an upper rubber ring is fixedly connected to the top of the lifting plate, with the upper rubber ring fitting against the bottom end of the screw cylinder.

[0011] Preferably, the bottom of the box cover is fixedly connected to a bottom frame and a second sealing gasket. The second sealing gasket is located inside the box body, the bottom frame is located outside the box body, and the bottom of the bottom frame is fixedly connected to a first sealing gasket located at the top of the outer frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The fit between the outer frame, positioning post, and positioning plate facilitates the placement of the lid. The fit between the U-shaped round rod, sliding plate, spring, insert rod, and side ring enables the initial installation of the lid. The fit between the guide rod, guide plate, insert plate, slot, movable rod, lifting plate, U-shaped round rod, screw, and screw cylinder further secures the lid, ensuring the stability of the connection between the lid and the box body.

[0014] 2. The fit between the bottom frame and sealing gasket one, and between the outer frame and sealing gasket two, facilitates the sealing between the lid and the body. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the explosion-proof junction box structure of the cable-mounted fiber optic temperature sensing device of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the positioning plate structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the skateboard structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the U-shaped round rod structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the disassembled structure of the lifting plate and screw cylinder of this utility model;

[0023] Figure 7 This is a schematic diagram of the box cover structure of this utility model.

[0024] In the diagram: 1. Box body; 2. Connecting mechanism; 201. Outer frame; 202. Positioning post; 203. Slide plate; 204. Top frame; 205. Positioning plate; 206. Side ring; 207. Slot; 208. Spring; 209. U-shaped round rod one; 2010. Guide groove; 2011. Guide rod; 2012. Insert rod; 2013. U-shaped round rod two; 2014. Lifting plate; 2015. Movable rod; 2016. Guide plate; 2017. Insert plate; 2018. Sleeve plate; 2019. Screw barrel; 2020. Upper rubber ring; 2021. Lower rubber ring; 2022. Screw; 2023. Handwheel; 2024. Bottom frame; 2025. Sealing gasket one; 2026. Sealing gasket two; 3. Box cover. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Example 1, by Figure 1 This utility model relates to an explosion-proof junction box with a fiber optic temperature sensing device for cable temperature. It includes a box body 1, a cover 3 on the top of the box body 1, and a connecting mechanism 2 between the cover 3 and the box body 1. Both the box body 1 and the cover 3 are made of high-strength aluminum alloy through one-time die casting, effectively preventing the propagation of internal explosion flames and high temperatures. The external part of the box body 1 is equipped with a fiber optic temperature sensing device, which consists of a fiber optic temperature sensor, a signal processor, etc. The fiber optic temperature sensor detects changes in cable temperature by detecting changes in light signals, and has advantages such as high accuracy, fast response, and resistance to electromagnetic interference. The signal processor processes, analyzes, and converts the signals from the sensor to achieve real-time temperature monitoring and alarm functions. The fiber optic cable in the fiber optic temperature sensing device... The fiber optic temperature sensor utilizes the temperature-sensitive characteristics of fiber optic gratings. When the cable temperature changes, the reflected wavelength of the fiber optic grating also changes accordingly. By detecting the change in reflected wavelength, the temperature change of the cable can be accurately calculated. The sensor converts the sensed temperature change into a change in optical signal, which is then transmitted to a signal processor via optical fiber. The signal processor demodulates, analyzes, and processes the optical signal, converting it into a digital or analog signal and comparing it with a preset temperature threshold. When the cable temperature exceeds the preset safety threshold, the signal processor will issue an alarm signal. At the same time, the enclosure 1 can effectively prevent the explosion of external explosive gases or dust caused by possible internal arcs, sparks, or high temperatures, ensuring safe operation in hazardous environments.

[0027] Specifically, by Figure 2-6The connecting mechanism 2 includes an outer frame 201 fixed to the outside of the housing 1. Two positioning posts 202 and two positioning plates 205 are symmetrically fixedly connected to the top of the outer frame 201. The housing cover 3 is movably fitted onto the outside of the two positioning posts 202 and the two positioning plates 205. Two top frames 204 are symmetrically fixedly connected to the top of the housing cover 3. The two top frames 204 are respectively fitted onto the outside of the two positioning plates 205. A U-shaped rod 209 is fixedly connected between the two top frames 204. A sliding plate 203 is movably fitted onto the outside of the U-shaped rod 209. Springs 208 are fixedly connected between each of the two top frames 204 and the sliding plate 203. Both springs 208 are fitted onto the U-shaped rod 209. On the outer side of 09, two insert rods 2012 are symmetrically fixedly connected to the outer side of the slide plate 203. Two side rings 206 are fixedly connected to the side of each side ring 206 near the slide plate 203. The two insert rods 2012 are inserted into the two side rings 206 respectively. A guide rod 2011 is fixedly connected to the slide plate 203. Two guide plates 2016 are symmetrically and movably sleeved on the outer side of the guide rod 2011. Insert plates 2017 are fixedly connected to the side of each guide plate 2016 that is far apart from each other. Slots 207 are provided on the side of each positioning plate 205 that is close to each other. The two insert plates 2017 are inserted into the two slots 207 respectively. A guide groove 2010 is provided on the slide plate 203. The two guide plates 2012... All 016 are slidably connected to the guide groove 2010. A U-shaped round rod 2013 is fixedly connected to the outer side of the slide plate 203. A lifting plate 2014 is movably sleeved on the outer side of the U-shaped round rod 2013. Two movable rods 2015 are symmetrically rotatably connected to the outer side of the lifting plate 2014. The ends of the two movable rods 2015 away from the lifting plate 2014 are rotatably connected to the two guide plates 2016 respectively. A sleeve plate 2018 is fixedly sleeved on the outer side of the U-shaped round rod 2013. A lower rubber ring 2021 is fixedly connected to the bottom of the lifting plate 2014, and the lower rubber ring 2021 abuts against the top of the sleeve plate 2018. A screw 2022 is fixedly connected to the top of the sleeve plate 2018. The lifting plate 2014 is located outside the screw 2022 and does not contact the screw 2022, so as to avoid wear on the screw 2022 when the lifting plate 2014 moves. The screw 2022 is threadedly fitted with a screw cylinder 2019. The top of the screw cylinder 2019 is fixedly connected to a handwheel 2023. The top of the lifting plate 2014 is fixedly connected to an upper rubber ring 2020. The upper rubber ring 2020 fits against the bottom of the screw cylinder 2019. Through the cooperation between the screw cylinder 2019, the upper rubber ring 2020, the lifting plate 2014, the lower rubber ring 2021 and the sleeve plate 2018, the screw 2022 can be sealed to prevent the screw 2022 from being exposed and corroding.

[0028] First, slide the slide plate 203 along the U-shaped rod 209 away from the two top frames 204, causing the two insert rods 2012 to move. At this time, both springs 208 are stretched. Then, place the box cover 3 on the outside of the two positioning posts 202 and the two positioning plates 205, while simultaneously placing the two top frames 204 on the outside of the two positioning plates 205. Then, release the slide plate 203. At this time, the two springs 208 return to their original position, causing the slide plate 203 to slide along the U-shaped rod 209. Simultaneously, the two insert rods 2012 move until they are inserted into the two side rings 206, initially fixing the box cover 3. Then, slide the lifting plate 2014 downward along the U-shaped rod 2013. The two movable rods 2015 drive the two guide plates 2016 to slide along the guide rod 2011 and guide groove 2010 respectively. At the same time, the two insert plates 2017 move away from each other until they are inserted into the two slots 207 respectively. At this time, the lower rubber ring 2021 is in contact with the sleeve plate 2018. Then, the handwheel 2023 is rotated clockwise, which drives the screw barrel 2019 to rotate outside the screw 2022. At the same time, the screw barrel 2019 descends until it abuts against the top of the upper rubber ring 2020, thereby limiting the lifting plate 2014 to prevent the two insert plates 2017 from moving, thus fixing the box cover 3 again and finally ensuring the stability of the connection between the box cover 3 and the box body 1.

[0029] Specifically, by Figure 7 As shown, the bottom of the box cover 3 is fixedly connected to the bottom frame 2024 and the sealing gasket 2026. The sealing gasket 2026 is located inside the box body 1, and the bottom frame 2024 is located outside the box body 1. The bottom of the bottom frame 2024 is fixedly connected to the sealing gasket 1 2025 located at the top of the outer frame 201.

[0030] In use, when the lid 3 is installed on top of the body 1, the second sealing gasket 2026 is in contact with the inner wall of the body 1, while the first sealing gasket 2025 is in contact with the top of the outer frame 201, ensuring the seal between the lid 3 and the body 1.

Claims

1. An explosion-proof junction box with a fiber optic grating temperature sensing device for cable temperature, comprising a box body (1), characterized in that: The top of the box (1) is provided with a box cover (3), and a connecting mechanism (2) is provided between the box cover (3) and the box (1); The connecting mechanism (2) includes an outer frame (201) fixed to the outside of the box body (1). Two positioning posts (202) and two positioning plates (205) are symmetrically fixedly connected to the top of the outer frame (201). The box cover (3) is movably sleeved on the outside of the two positioning posts (202) and the two positioning plates (205). Two top frames (204) are symmetrically fixedly connected to the top of the box cover (3). The two top frames (204) are respectively sleeved on the outside of the two positioning plates (205). A U-shaped round rod (209) is fixedly connected between the two top frames (204). A sliding plate (203) is movably sleeved on the outside of the U-shaped round rod (209). Springs (208) are fixedly connected between the two top frames (204) and the sliding plate (203). 8) All are sleeved on the outside of the U-shaped round rod (209). Two insert rods (2012) are symmetrically fixedly connected to the outside of the slide plate (203). Two side rings (206) are fixedly connected to the side of the slide plate (203) on the side. The two insert rods (2012) are inserted into the two side rings (206) respectively. A guide rod (2011) is fixedly connected on the slide plate (203). Two guide plates (2016) are symmetrically and movably sleeved on the outside of the guide rod (2011). Insert plates (2017) are fixedly connected to the side of the two guide plates (2016) that are far apart from each other. Slots (207) are provided on the side of the two positioning plates (205) that are close to each other. The two insert plates (2017) are inserted into the two slots (207) respectively.

2. The explosion-proof junction box with a cable temperature fiber optic grating temperature sensing device according to claim 1, characterized in that: The slide plate (203) is provided with a guide groove (2010), and both guide plates (2016) are slidably connected to the guide groove (2010).

3. The explosion-proof junction box with a cable temperature fiber optic grating temperature sensing device according to claim 1, characterized in that: The outer side of the slide plate (203) is fixedly connected to a U-shaped round rod (2013), and a lifting plate (2014) is movably sleeved on the outer side of the U-shaped round rod (2013). Two movable rods (2015) are symmetrically rotatably connected to the outer side of the lifting plate (2014), and the ends of the two movable rods (2015) away from the lifting plate (2014) are respectively rotatably connected to two guide plates (2016).

4. The explosion-proof junction box with a cable temperature fiber optic grating temperature sensing device according to claim 3, characterized in that: A sleeve plate (2018) is fixedly sleeved on the outer side of the U-shaped round rod (2013). A lower rubber ring (2021) is fixedly connected to the bottom of the lifting plate (2014). The lower rubber ring (2021) abuts against the top of the sleeve plate (2018). A screw rod (2022) is fixedly connected to the top of the sleeve plate (2018). The lifting plate (2014) is located outside the screw rod (2022) and does not contact the screw rod (2022).

5. The explosion-proof junction box with a cable temperature fiber optic grating temperature sensing device according to claim 4, characterized in that: The screw (2022) is threaded with a screw cylinder (2019) on its outer side. A handwheel (2023) is fixedly connected to the top of the screw cylinder (2019). An upper rubber ring (2020) is fixedly connected to the top of the lifting plate (2014). The upper rubber ring (2020) is in contact with the bottom end of the screw cylinder (2019).

6. The explosion-proof junction box with a cable temperature fiber optic grating temperature sensing device according to claim 1, characterized in that: The bottom of the box cover (3) is fixedly connected to a bottom frame (2024) and a second sealing gasket (2026). The second sealing gasket (2026) is located inside the box body (1), and the bottom frame (2024) is located outside the box body (1). The bottom of the bottom frame (2024) is fixedly connected to a first sealing gasket (2025) located on the top of the outer frame (201).

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