A sealed connector for petroleum storage tanks

Abstract

The utility model discloses a sealed connector for petroleum storage tank, including the connecting pipe no.

Description

Technical Field

[0001] This utility model relates to the field of oil storage tank technology, specifically a sealing connector for oil storage tanks. Background Technology

[0002] Crude oil storage tanks are sealed steel containers used to store crude oil and other petroleum products, primarily in industrial sectors such as refineries, oil fields, and oil depots. They come in various structural types and can be categorized by material into steel, reinforced concrete, and masonry. Steel tanks are further classified by structure into vertical, spherical, and horizontal types. Floating roof tanks reduce evaporation through a lifting floating roof and are suitable for volatile oils such as gasoline. Dome-roof tanks are mostly used for storing non-volatile oils such as diesel fuel. Horizontal tanks have smaller volumes and are commonly found in production processes or gas stations. Tank farms require safety facilities such as fire protection, lightning protection, and fire dikes. Sealing connectors for oil storage tanks are crucial components for ensuring the safe and environmentally friendly operation of the tanks. They are mainly used at the connection points between pipelines, valves, measuring equipment, and the tank to prevent oil and gas leaks.

[0003] In some existing sealing connectors for oil storage tanks, flanges, metal gaskets, and bolts and nuts are used to seal the oil storage tanks. First, the flanges are welded to the pipe interfaces that need to be sealed. Then, the metal gaskets are placed between the sealing surfaces of the two flanges to tightly connect them. By tightening the bolts and nuts, an axial force is generated, which causes the flanges to squeeze the metal gaskets to achieve a seal.

[0004] Existing sealing connectors for oil storage tanks have the following problems: when sealing oil storage tanks, sealing is achieved through a combination of flanges, metal gaskets, and bolts and nuts. A single metal gasket results in a single sealing path. The metal gasket has high rigidity and relies on precise installation and pre-tightening force. The metal gasket is also susceptible to corrosion from the medium or oxidation at high temperatures. Therefore, we propose a sealing connector for oil storage tanks. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a sealing connector for oil storage tanks. When sealing the oil storage tank, a three-dimensional composite sealing structure is formed by multiple layers of rubber sealing rings. The rubber material is soft, the sealing reliability is higher, the rubber sealing rings have strong corrosion resistance and long-lasting elasticity, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sealing connector for oil storage tanks, comprising a connecting pipe one and a connecting pipe two, wherein connecting flanges are fixedly connected to the outer walls of the opposite inner ends of the connecting pipe one and the connecting pipe two, and a sealing connection mechanism is also included.

[0007] Sealing connection mechanism: It includes internal thread, external thread and sealing ring one. The inner wall of the rear connecting flange is provided with internal thread, and the outer wall of the rear end of the connecting pipe two is provided with external thread. The internal thread and external thread are threaded together. The front end of the connecting pipe one and the rear end of the connecting pipe two are provided with sealing ring one. When sealing the oil storage tank, a three-dimensional composite sealing structure is formed by multiple rubber sealing rings. The rubber material is soft, the sealing reliability is higher, the rubber sealing ring has strong corrosion resistance and long-lasting elasticity.

[0008] Furthermore, the sealing connection mechanism also includes a sealing ring five, which is provided at the edge between the front end of the rear connecting flange and the rear end of the front connecting flange to achieve sealing.

[0009] Furthermore, the sealing connection mechanism also includes a trapezoidal connecting ring, a third sealing ring, and a fourth sealing ring. The outer walls of the first connecting pipe and the second connecting pipe are respectively movably fitted with trapezoidal connecting rings. A third sealing ring is provided between the first stepped surface of the trapezoidal connecting ring and the convex surface of the longitudinally adjacent connecting flange opposite to the outer side. A fourth sealing ring is provided between the second stepped surface of the trapezoidal connecting ring and the concave surface of the longitudinally adjacent connecting flange opposite to the outer side, thereby achieving a seal.

[0010] Furthermore, the sealing connection mechanism also includes a second sealing ring, which is provided between the inner sides of the trapezoidal connecting ring to achieve sealing.

[0011] Furthermore, the sealing connection mechanism also includes a circular cover, a sliding groove, a first upright plate, and a second upright plate. The outer wall of the trapezoidal connecting ring is fixedly fitted with a circular cover. The outer wall of the rear circular cover is provided with a uniformly distributed sliding groove. The edge of the rear end of the rear circular cover is provided with a uniformly distributed second upright plate. The rear side of the outer wall of the front circular cover is provided with a uniformly distributed first upright plate. The first upright plate is slidably connected to the longitudinally adjacent sliding groove for easy fixation.

[0012] Furthermore, the sealing connection mechanism also includes fixing bolts. The front end of the first vertical plate is threaded with fixing bolts, and the middle part of the second vertical plate is provided with threaded holes. The rear side of the fixing bolts is threadedly connected to the longitudinally adjacent threaded holes for easy fixing.

[0013] Furthermore, all five sealing rings (sealing ring 1, sealing ring 2, sealing ring 3, sealing ring 4, and sealing ring 5) are rubber sealing rings, achieving a better sealing effect.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This sealing connector for oil storage tanks has the following advantages:

[0015] The rear connecting flange is screwed into the external thread of the connecting pipe to fix it, and the sealing ring 1 is squeezed to prevent liquid leakage from the inner wall of the pipe. At the same time, the two flanges are pressed together to squeeze the sealing ring 5 to block leakage from the outer circumference of the flange. The trapezoidal connecting ring is put on the outer wall of the connecting pipe, and the circular cover is aligned so that the vertical plate 1 is inserted into the slide groove. The circular cover is rotated to drive the trapezoidal rings to move towards each other, so that the sealing rings 3 and 4 squeeze and fill the gap between the convex and concave surfaces of the flange respectively. The sealing ring 2 squeezes and seals the butt joint of the trapezoidal rings. Finally, the circular cover is locked with the fixing bolts to fix the trapezoidal rings and maintain the compression state of all sealing rings to achieve long-term sealing. When sealing the connection of oil storage tanks, a three-dimensional composite sealing structure is formed by multiple layers of rubber sealing rings. The rubber material is soft, the sealing reliability is higher, the rubber sealing ring has strong corrosion resistance, and the elasticity is durable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0019] Figure 4 This is an enlarged structural diagram of section B of the present invention.

[0020] In the diagram: 1 Connecting pipe one, 2 Connecting flange, 3 Sealing connection mechanism, 301 Internal thread, 302 External thread, 303 Sealing ring one, 304 Trapezoidal connecting ring, 305 Sealing ring two, 306 Sealing ring three, 307 Sealing ring four, 308 Circular cover, 309 Slide groove, 310 Vertical plate one, 311 Fixing bolt, 312 Vertical plate two, 313 Sealing ring five, 4 Connecting pipe two. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This embodiment provides a technical solution: a sealing connector for oil storage tanks, including a connecting pipe 1 and a connecting pipe 4, with connecting flanges 2 fixedly connected to the outer walls of the opposite inner ends of the connecting pipe 1 and the connecting pipe 4, and also includes a sealing connection mechanism 3.

[0023] Sealing connection mechanism 3 includes an internal thread 301, an external thread 302, and a sealing ring 303. The inner wall of the rear connecting flange 2 is provided with an internal thread 301, and the outer wall of the rear end of the connecting pipe 4 is provided with an external thread 302. The internal thread 301 and the external thread 302 are threadedly connected. The front end of the connecting pipe 1 and the rear end of the connecting pipe 2 are provided with a sealing ring 303. The sealing connection mechanism 3 also includes a sealing ring 313. A sealing ring 313 is provided at the edge between the front end of the rear connecting flange 2 and the rear end of the front connecting flange 2. The sealing connection mechanism 3 also includes a trapezoidal connecting ring 304, a sealing ring 306, and a sealing ring 307. The outer walls of the connecting pipe 1 and the connecting pipe 2 are respectively movably fitted with trapezoidal connecting rings 304. The first step surface of the trapezoidal connecting ring 304 is connected to the outer wall of the connecting pipe 1 and the connecting pipe 2. A sealing ring 306 is provided between the convex surfaces of the longitudinally adjacent connecting flanges 2 facing away from their outer sides. A sealing ring 407 is provided between the second step surface of the trapezoidal connecting ring 304 and the concave surface of the longitudinally adjacent connecting flanges 2 facing away from their outer sides. The sealing connection mechanism 3 also includes a sealing ring 205. A sealing ring 205 is provided between the inner surfaces of the trapezoidal connecting ring 304. The sealing connection mechanism 3 also includes a circular cover 308, a sliding groove 309, a first vertical plate 310, and a second vertical plate 312. A circular cover 308 is fixedly fitted onto the outer wall of the trapezoidal connecting ring 304. The outer wall of the rear circular cover 308 has evenly distributed sliding grooves 309. The edge of the rear end of the rear circular cover 308 has evenly distributed second vertical plates 312. The outer wall of the front circular cover 308... The rear side is provided with evenly distributed vertical plates 310. The vertical plates 310 are slidably connected to the longitudinally adjacent sliding grooves 309. The sealing connection mechanism 3 also includes fixing bolts 311. The front ends of the vertical plates 310 are threaded with fixing bolts 311. The middle part of the vertical plate 312 is provided with threaded holes. The rear sides of the fixing bolts 311 are threadedly connected to the longitudinally adjacent threaded holes. The sealing rings 303, 305, 306, 307, and 313 are all rubber sealing rings (rubber sealing rings can undergo elastic deformation under certain pressure, tightly filling the connection gap. Even if the equipment undergoes slight displacement due to temperature changes or medium pressure, it can still maintain the sealing state through elastic recovery). The sealing rings are connected to the inner wall of the rear connecting flange by internal threads. The thread 301 engages with the external thread 302 at the rear end of the connecting pipe 2, forming a preliminary fixation and providing basic axial positioning. Simultaneously, it compresses the sealing ring 303, preventing media leakage from the pipe's inner wall interface. When the two connecting flanges 2 are fitted together, the sealing ring 313 is compressed, forming an outer sealing barrier to prevent media leakage from the outer periphery of the connecting flanges 2. Next, the two trapezoidal connecting rings 304 are respectively fitted onto the outer walls of connecting pipe 1 and connecting pipe 2. Then, the two circular covers 308 are aligned, with the vertical plate 310 of the front circular cover inserted into the groove 309 of the rear circular cover 308. Next, the two circular covers 308 are rotated, aligning the vertical plate 310 with the vertical plate 312, thereby causing the two trapezoidal connecting rings 304 to move towards each other.This causes the sealing ring 306 to be positioned between the first stepped surface of the trapezoidal connecting ring 304 and the convex surface of the outer side of the connecting flange 2. When the connecting flanges 2 move towards each other, the sealing ring 306 is compressed, filling the gap between the convex surfaces and preventing the medium from leaking from the outer wall of the pipe and the connecting flange 2. The sealing ring 307 will be positioned between the second stepped surface of the trapezoidal connecting ring 304 and the concave surface of the outer side of the connecting flange 2. Through the shape matching of the stepped surfaces and the compression of the sealing ring 307, the sealing performance at the concave surface is further enhanced. Sealing ring 2 305 is positioned between the inner surfaces of the two trapezoidal connecting rings 304. When the trapezoidal connecting rings 304 slide closer together, sealing ring 2 305 is compressed, preventing the medium from overflowing from the mating gap of the trapezoidal connecting rings 304. Then, the fixing bolt 311 at the front end of the vertical plate 1 310 is screwed into the threaded hole of the rear vertical plate 2 312. Tightening the fixing bolt 311 locks the front and rear circular covers 308 into a single unit. At this point, the trapezoidal connecting rings 304 are fixed, and all sealing rings remain compressed, forming a long-lasting seal.

[0024] The working principle of the sealing connector for oil storage tanks provided by this utility model is as follows: When using the sealing connector for oil storage tanks, the inner thread 301 of the rear connecting flange is screwed into the outer thread 302 of the rear end of the connecting pipe 2, forming a preliminary fixation and providing basic axial positioning. At the same time, the sealing ring 303 is squeezed to prevent the medium from leaking from the interface of the inner wall of the pipe. When the two connecting flanges 2 are in contact, the sealing ring 313 is squeezed to form an outer sealing barrier to prevent the medium from leaking from the outer periphery of the connecting flange 2. Then, the two trapezoidal connecting rings 304 are respectively fitted onto the outer walls of the connecting pipe 1 and the connecting pipe 2. Next, the two circular covers 308 are aligned, and the vertical plate 310 of the front circular cover is inserted into the sliding groove 309 of the rear circular cover 308. Then, the two circular covers 308 are rotated so that the vertical plate 310 and the vertical plate 312 correspond to each other, thereby driving the two trapezoidal connecting rings 304 to move towards each other, and thus positioning the sealing ring 306 respectively. Between the first stepped surface of the trapezoidal connecting ring 304 and the convex surface of the outer side of the connecting flange 2, when the connecting flange 2 moves towards each other, the sealing ring 306 is squeezed to fill the gap of the convex surface, preventing the medium from leaking from the outer wall of the pipe and the connecting flange 2. The sealing ring 407 will be located between the second stepped surface of the trapezoidal connecting ring 304 and the concave surface of the outer side of the connecting flange 2. Through the shape matching of the stepped surface and the compression of the sealing ring 407, the sealing performance at the concave surface is further enhanced. At the same time, the sealing ring 205 is set between the inner surfaces of the two trapezoidal connecting rings 304. When the trapezoidal connecting rings 304 slide close together, the sealing ring 205 is squeezed to prevent the medium from overflowing from the mating gap of the trapezoidal connecting rings 304. Then, the fixing bolt 311 at the front end of the vertical plate 1 310 is screwed into the threaded hole of the rear vertical plate 2 312. The fixing bolt 311 is tightened to lock the front and rear circular covers 308 into one piece. At this time, the trapezoidal connecting ring 304 is fixed, and all sealing rings are kept in a compressed state to form a long-term seal.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sealing connector for an oil storage tank, comprising a first connecting pipe (1) and a second connecting pipe (4), wherein connecting flanges (2) are fixedly connected to the outer walls of the opposite inner ends of the first connecting pipe (1) and the second connecting pipe (4), characterized in that: It also includes a sealing connection mechanism (3); Sealing connection mechanism (3): It includes internal thread (301), external thread (302) and sealing ring one (303). The inner wall of the rear connecting flange (2) is provided with internal thread (301), and the outer wall of the rear end of the connecting pipe two (4) is provided with external thread (302). The internal thread (301) and the external thread (302) are threadedly connected. The front end of the connecting pipe one (1) and the rear end of the connecting pipe two (4) are provided with sealing ring one (303).

2. A sealing connector for oil storage tanks according to claim 1, characterized in that: The sealing connection mechanism (3) also includes a sealing ring five (313), and a sealing ring five (313) is provided at the edge between the front end of the rear connecting flange (2) and the rear end of the front connecting flange (2).

3. A sealing connector for an oil storage tank according to claim 2, characterized in that: The sealing connection mechanism (3) further includes a trapezoidal connecting ring (304), a sealing ring three (306) and a sealing ring four (307). The outer walls of the connecting pipe one (1) and the connecting pipe two (4) are respectively movably fitted with trapezoidal connecting rings (304). A sealing ring three (306) is provided between the first step surface of the trapezoidal connecting ring (304) and the convex surface of the longitudinally adjacent connecting flange (2) opposite to the outer side. A sealing ring four (307) is provided between the second step surface of the trapezoidal connecting ring (304) and the concave surface of the longitudinally adjacent connecting flange (2) opposite to the outer side.

4. A sealing connector for an oil storage tank according to claim 3, characterized in that: The sealing connection mechanism (3) further includes a second sealing ring (305), and the second sealing ring (305) is provided between the inner sides of the trapezoidal connecting ring (304).

5. A sealing connector for an oil storage tank according to claim 3, characterized in that: The sealing connection mechanism (3) further includes a circular cover (308), a sliding groove (309), a first upright plate (310) and a second upright plate (312). The outer wall of the trapezoidal connecting ring (304) is respectively fixedly fitted with a circular cover (308). The outer wall of the rear circular cover (308) is provided with a uniformly distributed sliding groove (309). The edge of the rear end of the rear circular cover (308) is provided with a uniformly distributed second upright plate (312). The rear side of the outer wall of the front circular cover (308) is provided with a uniformly distributed first upright plate (310). The first upright plate (310) is slidably connected to the longitudinally adjacent sliding groove (309).

6. A sealing connector for an oil storage tank according to claim 5, characterized in that: The sealing connection mechanism (3) also includes a fixing bolt (311). The front end of the first vertical plate (310) is threaded with a fixing bolt (311), and the middle part of the second vertical plate (312) is provided with threaded holes. The rear side of the fixing bolt (311) is threadedly connected to the adjacent threaded holes in the longitudinal direction.

7. A sealing connector for an oil storage tank according to claim 4, characterized in that: The sealing rings 1 (303), 2 (305), 3 (306), 4 (307) and 5 (313) are all rubber sealing rings.

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