Explosion-proof laser sensing structure

Abstract

The utility model belongs to the field of pharmaceutical machinery, and particularly relates to an explosion-proof laser sensing structure which comprises an explosion-proof outer cover, an outer cover fixing flange, a tank body fixing flange, a laser sensor and a lens, the explosion-proof outer cover is fixed at the upper end of the outer cover fixing flange, the outer cover fixing flange is fixedly connected with the tank body fixing flange, and the laser sensor is fixed on the outer cover fixing flange. The lens is fixed in the outer cover fixing flange, the laser sensor is fixed in the anti-explosion outer cover, and a detection head of the laser sensor faces the lens. Compared with the prior art, after the laser sensing structure provided by the utility model is assembled on the tank body of the container, non-contact liquid level monitoring can be realized outside the container, the laser sensing structure is provided with an anti-explosion and pressure-bearing structure, and a non-anti-explosion laser sensor can be used for monitoring through a lens, so that the operation stability of the laser sensor is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of pharmaceutical machinery, specifically relating to an explosion-proof laser sensing structure. Background Technology

[0002] In the pharmaceutical, chemical, and food manufacturing industries, liquid level detection devices are crucial for monitoring storage and production processes. Common liquid level sensors include capacitive sensors, ultrasonic sensors, radar sensors, hydrostatic sensors, and laser sensors. Laser sensors offer advantages such as high precision, small blind zone, strong anti-interference capabilities, and adaptability to extreme environments, making them a preferred choice in some applications. However, in the chemical and pharmaceutical manufacturing sectors, laser sensors require a certain level of explosion-proof capability. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an explosion-proof laser sensing structure.

[0004] The technical solution adopted by this utility model is as follows: an explosion-proof laser sensing structure, including an explosion-proof outer cover, an outer cover fixing flange, a tank body fixing flange, a laser sensor, and a lens. The explosion-proof outer cover is fixed to the upper end of the outer cover fixing flange, and the outer cover fixing flange and the tank body fixing flange are fixedly connected. The lens is fixed inside the outer cover fixing flange, and the laser sensor is fixed inside the explosion-proof outer cover with its detection head facing the lens.

[0005] A middle spacer is fixed between the outer cover fixing flange and the tank body fixing flange. A pressure ring is connected to the upper end of the middle spacer. The lens is fixed between the middle spacer and the pressure ring. The explosion-proof outer cover, the outer cover fixing flange, the middle spacer, and the lens form a sealed explosion-proof cavity. The laser sensor is fixed inside the explosion-proof cavity.

[0006] The laser sensor is fixed on the pressure ring.

[0007] The laser sensor is detachably connected to the pressure ring and its height relative to the pressure ring is adjustable.

[0008] The upper inner circumference of the intermediate spacer ring forms a lower groove that matches the shape of the lens, and the lower inner circumference of the pressure ring forms an upper groove that matches the shape of the lens. The upper and lower ends of the lens are respectively embedded in the upper groove and the lower groove, and sealing gaskets are provided between the upper and lower end faces and the pressure ring and the intermediate spacer ring, respectively.

[0009] A certain space is provided between the outer periphery of the sealing gasket and the pressure ring, as well as between the sealing gasket and the intermediate spacer ring, to form an explosion-proof surface.

[0010] The intermediate spacer ring and pressure ring are fixed by a flange connection structure.

[0011] The lower end face of the outer cover fixing flange is formed with an upper limit convex ring that matches the outer circumference shape of the intermediate spacer ring, and the upper end face of the tank body fixing flange is formed with a lower limit convex ring that matches the outer circumference shape of the intermediate spacer ring. The upper and lower ends of the intermediate spacer ring are respectively limited within the upper limit convex ring and the lower limit convex ring.

[0012] O-rings are provided between the upper and lower end faces of the intermediate spacer ring and the outer cover fixing flange and the tank body fixing flange, respectively.

[0013] The upper and lower end faces of the intermediate spacer ring are provided with sealing ring grooves, and the O-ring is embedded in the sealing ring groove.

[0014] The beneficial effects of this utility model are as follows: Compared with the prior art, the laser sensing structure provided by this utility model can achieve non-contact liquid level monitoring outside the container after being assembled on the container body. It also has an explosion-proof and pressure-bearing structure. The non-explosion-proof laser sensor can be monitored through a lens to ensure the stability of the laser sensor operation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a cross-sectional view of one embodiment of the present utility model;

[0017] Figure 2 This is a top view of one embodiment of the present utility model;

[0018] Figure 3 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0019] In the diagram, the explosion-proof cover-1, the cover fixing flange-2, the upper limit convex ring-201, the tank fixing flange-3, the lower limit convex ring-301, the laser sensor-4, the clamping connection structure-401, the liftable connection structure-402, the lens-5, the intermediate spacer ring-6, the pressure ring-7, the sealing gasket-8, and the O-ring seal-9 are all present. Detailed Implementation

[0020] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0021] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0022] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0023] like Figure 1 , Figure 2 As shown, an explosion-proof laser sensing structure includes an explosion-proof outer cover 1, an outer cover fixing flange 2, a tank fixing flange 3, a laser sensor 4, a lens 5, a middle spacer ring 6, and a pressure ring 7. The explosion-proof outer cover 1 is fixed to the upper end of the outer cover fixing flange 2. The middle spacer ring 6 is fixed between the outer cover fixing flange 2 and the tank fixing flange 3, and the outer cover fixing flange 2 and the tank fixing flange 3 are fixedly connected by several bolts. The inner circumference of the middle spacer ring 6 protrudes relative to the inner circumference of the outer cover fixing flange 2. The pressure ring 7 is fixed to the upper end of the protruding portion of the middle spacer ring 6 relative to the inner circumference of the outer cover fixing flange 2 by several bolts. The lens 5 is fixed between the middle spacer ring 6 and the pressure ring 7. The explosion-proof outer cover 1, the outer cover fixing flange 2, the middle spacer ring 6, and the lens 5 form a sealed explosion-proof cavity. The laser sensor 4 is fixed inside the explosion-proof cavity. During detection, the liquid level in the tank is detected through the lens 5.

[0024] The explosion-proof cover 1 is made of high-strength explosion-proof materials, such as stainless steel, carbon steel, and engineering plastics. The explosion-proof cover 1 and the cover fixing flange 2 are welded together using a seamless welding process. The lens 5 is preferably made of explosion-proof glass.

[0025] like Figure 3As shown, the outer cover fixing flange 2, tank body fixing flange 3, laser sensor 4, lens 5, intermediate spacer ring 6, and pressure ring 7 are connected by a stable and reliable explosion-proof sealing structure. Specifically, the inner circumference of the upper end of the intermediate spacer ring 6 forms a lower groove that matches the shape of the lens 5, and the inner circumference of the lower end of the pressure ring 7 forms an upper groove that matches the shape of the lens 5. The upper and lower ends of the lens 5 are respectively embedded in the upper and lower grooves, and sealing gaskets 8 are provided between the upper and lower end faces and the pressure ring 7 and the intermediate spacer ring 6, respectively, to provide effective sealing. Furthermore, a certain space is provided between the outer circumference of the sealing gasket 8 and the pressure ring 7, as well as between the sealing gasket 8 and the intermediate spacer ring 6, to form an explosion-proof surface. Specifically, the outer diameter of the sealing gasket 8 is smaller than the outer diameter of the lens 5, so that the outer circumference of the assembled sealing gasket 8 forms an explosion-proof surface between the pressure ring 7 and the intermediate spacer ring 6, thereby improving the sealing and explosion-proof effect between the explosion-proof cavity and the inner cavity of the tank. The lower end face of the outer cover fixing flange 2 has an upper limit protrusion ring 201 that matches the outer circumference of the intermediate spacer ring 6. The upper end face of the tank body fixing flange 3 has a lower limit protrusion ring 301 that matches the outer circumference of the intermediate spacer ring 6. The upper and lower ends of the intermediate spacer ring 6 are respectively confined within the upper limit protrusion ring 201 and the lower limit protrusion ring 301. O-rings 9 are respectively provided between the upper and lower end faces of the intermediate spacer ring 6 and the outer cover fixing flange 2 and the tank body fixing flange 3, providing effective sealing and forming a reliable explosion-proof surface, improving the sealing and explosion-proof effect between the explosion-proof cavity and the external space. Furthermore, the upper and lower end faces of the intermediate spacer ring 6 have sealing ring grooves, and the O-rings 9 are embedded in the sealing ring grooves for easy assembly.

[0026] The laser sensor 4 is fixed to the pressure ring 7, and the two are detachably connected with each other and their height relative to the pressure ring 7 is adjustable. The laser sensor 4 is provided with a clamping connection structure 401, which is detachably connected to a liftable connection structure 402 and fixed to the pressure ring 7 through the liftable connection structure 402. The liftable connection structure 402 can be a conventional connection structure that can achieve height adjustment, such as a screw and nut, screw hole and bolt mating structure, etc.

[0027] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An explosion-proof laser sensing structure, characterized in that: The application relates to a laser sensor, which comprises an explosion-proof cover (1), a cover fixing flange (2), a tank body fixing flange (3), a laser sensor (4) and a lens (5), wherein the explosion-proof cover (1) is fixed at the upper end of the cover fixing flange (2), the cover fixing flange (2) and the tank body fixing flange (3) are fixedly connected, the lens (5) is fixed in the cover fixing flange (2), and the laser sensor (4) is fixed in the explosion-proof cover (1) and the detection head thereof faces the lens (5).

2. The explosion-proof laser sensing structure according to claim 1, characterized in that: An intermediate spacing ring (6) is fixed between the cover fixing flange (2) and the tank body fixing flange (3), a pressing ring (7) is connected to the upper end of the intermediate spacing ring (6), the lens (5) is fixed between the intermediate spacing ring (6) and the pressing ring (7), a closed explosion-proof cavity is formed among the explosion-proof cover (1), the cover fixing flange (2), the intermediate spacing ring (6) and the lens (5), and the laser sensor (4) is fixed in the explosion-proof cavity.

3. The explosion-proof laser sensing structure according to claim 2, characterized in that: The laser sensor (4) is fixed on the pressing ring (7).

4. The explosion-proof laser sensing structure according to claim 3, characterized in that: The laser sensor (4) is detachably connected with the pressing ring (7) and the height of the laser sensor (4) relative to the pressing ring (7) is adjustable.

5. The explosion-proof laser sensing structure according to claim 2, characterized in that: A lower groove is formed in the inner periphery of the upper end of the intermediate spacing ring (6) and is matched with the shape of the lens (5), an upper groove is formed in the inner periphery of the lower end of the pressing ring (7) and is matched with the shape of the lens (5), the upper and lower ends of the lens (5) are respectively embedded in the upper groove and the lower groove, and the upper and lower end faces of the lens (5) are respectively provided with sealing gaskets (8) between the pressing ring (7) and the intermediate spacing ring (6).

6. The explosion-proof laser sensing structure according to claim 5, characterized in that: A space is formed between the outer periphery of the sealing gasket (8) and the pressing ring (7) and between the outer periphery of the sealing gasket (8) and the intermediate spacing ring (6) to form an explosion-proof surface.

7. The explosion-proof laser sensing structure according to claim 2 or 5 or 6, characterized in that: The intermediate spacing ring (6) and the pressing ring (7) are fixed through a flange connecting structure.

8. The explosion-proof laser sensing structure according to claim 2, characterized in that: An upper limiting convex ring (201) matched with the shape of the outer periphery of the intermediate spacing ring (6) is formed on the lower end face of the cover fixing flange (2), a lower limiting convex ring (301) matched with the shape of the outer periphery of the intermediate spacing ring (6) is formed on the upper end face of the tank body fixing flange (3), and the upper and lower ends of the intermediate spacing ring (6) are respectively limited in the upper limiting convex ring (201) and the lower limiting convex ring (301).

9. The explosion-proof laser sensing structure according to claim 8, characterized in that: O-shaped sealing rings (9) are respectively arranged between the upper and lower end faces of the intermediate spacing ring (6) and the cover fixing flange (2) and the tank body fixing flange (3).

10. The explosion-proof laser sensing structure according to claim 9, characterized in that: The upper and lower end faces of the intermediate spacing ring (6) are provided with sealing ring embedding grooves, and the O-shaped sealing rings (9) are embedded in the sealing ring embedding grooves.

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