An explosion-proof oil tank

Abstract

The application discloses a kind of explosion-proof oil tank, belong to oil tank technical field, the outer portion of inner tank is spirally wound with non-metal gas pipe along its axis, the inlet end of gas pipe is connected with compressed gas source, piston is slidably fitted in the inside of gas pipe, magnet is embedded in the inside of piston, slidingly fitted slider is provided on the outside of gas pipe, the inside of slider is provided with magnetic block attracted by magnet, so that magnet moves in the inside of gas pipe, and spiral motion is carried out together with magnetic block;Slider is made of material that can allow fuel to infiltrate, when slider spirally moves together with magnetic block in the outside of inner tank, reliable contact with the surface of inner tank is always maintained;Combustible gas detector or / and transparent window is provided on the outlet end of gas pipe, and is installed on the tank body of outer tank.The explosion-proof oil tank provided by the application can detect internal leakage in a timely manner, reduce the use of detector, and improve the explosion-proof safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of oil tanks, and in particular to a flameproof oil tank. Background Art

[0002] Explosion-proof oil tanks are primarily used to hold fuels such as gasoline, kerosene, and diesel. These oils are typically housed in double-layered tanks to prevent leakage and improve explosion-proofing. Existing flammable gas detectors for these tanks are often mounted on top of the tank, with the probe inserted into the gap between the inner and outer tanks to detect leaks. This detection method requires the gap between the inner and outer tanks to be filled with sufficient gas and oil to detect leaks. This gas and oil, in turn, requires sufficient fuel leakage to evaporate to a sufficient volume. Therefore, by the time a leak is detected, it has often already leaked for a considerable amount of time, posing a significant safety hazard to fuel storage and transportation. To improve the timeliness of detection, existing techniques employ multiple detectors between the inner and outer tanks, achieving multi-point detection to detect leaks as promptly as possible. While this approach improves detection timeliness to a certain extent, it comes at a high cost. A major drawback is that the excessive number of detectors increases the number of signal and power circuits, creating more potential flammable and explosive nodes, a significant disadvantage that outweighs the benefits. Summary of the Invention

[0003] The problem to be solved by the present invention is to provide a flameproof oil tank in view of the above-mentioned deficiencies in the prior art, thereby solving the problem in the prior art that it is difficult to detect oil tank leakage safely and timely and that good flameproof performance cannot be guaranteed.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an explosion-proof oil tank, comprising an inner tank and an outer tank, wherein the inner tank is installed inside the outer tank, and the inner tank and the outer tank do not contact each other; a non-metallic gas pipe is spirally wound around the outer side of the inner tank along its axis; the inlet end of the gas pipe is connected to a compressed gas source; a piston is slidably fitted inside the gas pipe, a magnet is embedded inside the piston, and a slider is slidably sleeved on the outer side of the gas pipe; a sticky magnetic block is provided inside the slider that is attracted to the magnet, so that when the magnet moves in the gas pipe, it moves spirally with the sticky magnetic block;

[0005] The slider is made of a material that can be soaked in fuel. When the slider makes a spiral motion outside the inner tank together with the magnetic block, it always maintains reliable contact with the surface of the inner tank; at the outlet end of the gas pipe that passes through the outer tank, a combustible gas detector and / or a transparent window installed on the tank body of the outer tank is provided.

[0006] Furthermore, the upper and lower opposite side walls in the inner tank are respectively provided with axially spaced water stop plates, and the water stop plates on the upper and lower sides are staggered with each other.

[0007] Furthermore, the air delivery pipe is a rigid plastic pipe with a smooth surface, the piston is made of elastic plastic material, and the slider is made of sponge.

[0008] Furthermore, the magnetic block is fixed on the side of the slider facing away from the inner tank and is tied to the slider by an insulating rope.

[0009] Furthermore, the bottom of the inner tank is supported and installed above the bottom of the outer tank through a plurality of supports.

[0010] Furthermore, the top of the support has an arc-shaped bearing bar, and the inner tank is mounted on the bearing bar in a sliding manner; one end of the inner tank is inserted into a first slide, one end of the first slide is fixed on the inner end surface of the outer tank, and the other end is open for the axial sliding insertion of the end of the outer tank, and is in contact with the inner bottom surface of the first slide through a first pressure spring.

[0011] Furthermore, a wedge block is fixed to the other end of the inner tank, and the wedge block is inserted into a second slide seat fixed on the other inner end surface of the outer tank opposite to it. The wedge block cooperates with the inclined surface of a wedge block inserted into the second slide seat, and a friction block is tightly attached to the vertical surface of the wedge block opposite to the inclined surface. The friction block is slidably fitted in the second slide seat and is in contact with the second pressure spring in the second slide seat.

[0012] Furthermore, an L-shaped positioning rod is fixed to the top end of the wedge block, and the positioning rod contacts and engages with the side surface of a sliding pin elastically and telescopically mounted on the end surface of the inner tank.

[0013] Furthermore, a plate is fixed to the end face of the inner tank, a blind hole is horizontally opened on the plate, and a sliding pin extending out of the plate and toward the positioning rod is connected in the blind hole through a spring. A plurality of sliding pins are evenly spaced from top to bottom, and the gap between adjacent sliding pins is for the horizontal section of the positioning rod to be inserted.

[0014] Furthermore, a sleeve is vertically provided on the inner tank, which penetrates the tank wall of the outer tank and extends out of the outside of the oil tank. A core shaft is rotatably installed in the sleeve. The top end of the core shaft extends out of the outer tank and is installed with a worm gear, and the bottom end extends into the inner tank. A threaded section near the bottom end is matched with a threaded pressure ring.

[0015] The core shaft has an air vent inside, one end of the air vent extends vertically upward along the core shaft and horizontally penetrates the core shaft and the side wall of the sleeve to communicate with the outside, and the other end of the air vent horizontally penetrates the bottom end of the core shaft in the inner tank. When the core shaft rotates in situ around its own axis, the threaded pressure ring can move upward and press on the inner surface of the inner tank in a sealing fit. At this time, the other end of the air vent is located in a cover body covering the bottom end of the core shaft, and the open end of the cover body is fixedly connected to the threaded pressure ring;

[0016] A pressure tube inserted into the inner tank is also fixed on the inner tank, and a sliding plug is provided in the pressure tube. The top of the sliding plug is connected to a rack through a transmission rod. The rack transmits a worm through a gear. The worm is connected to the worm gear. When the sliding plug moves upward, it drives the worm gear to rotate and the core shaft to rotate, so that the threaded pressure ring moves downward and gradually exposes the other end of the vent hole.

[0017] Compared to existing technologies, the present invention offers the following advantages: It utilizes a relatively original approach, relying on a simple structural design. A spiral gas pipe serves as a guide for the slider, guiding it to spiral around the exterior of the inner tank. This allows leak sampling over a large area of ​​the inner tank surface, enabling immediate detection of leaks and prompt fuel cleanup, minimizing the accumulation of leaked fuel and preventing the resulting localized concentration of volatile combustible gas. Furthermore, the present invention provides an inner tank structure and a buffering and vibration-reducing mounting method, as well as pressure relief and exhaust when internal pressure rises, enhancing explosion-proof performance from multiple perspectives. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 yes Figure 1 The enlarged view of point I in the middle;

[0021] Figure 3 1. It is a schematic diagram of a structure provided with a water stop plate;

[0022] Figure 4 It is a cache structure diagram of the inner tank and the outer tank;

[0023] Figure 5 yes Figure 1 Magnified view of II in FIG.

[0024] The description of the accompanying drawings is as follows: outer tank 1, inner tank 2, gas pipe 3, slider 4, combustible gas detector 5, load-bearing bar 6, first slide 7, first pressure spring 8, second slide 9, second pressure spring 10, wedge 11, wedge block 12, water stop plate 13, sleeve 14, core shaft 15, vent 16, worm gear 17, threaded pressure ring 18, cover 19, guide rod 20, pressure pipe 21, sliding plug 22, transmission rod 23, rack 24, gear 25, sliding pin 26, positioning rod 27, and plate 28. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention clearer and easier to understand, the technical solutions of the present invention will be described in detail below. Those skilled in the art should know that the following embodiments are only some of the specific implementation structures or methods of the present invention, rather than all embodiments, and therefore, the scope of protection of the present invention is not limited thereto.

[0026] See also Figure 1-Figure 2 As shown, this embodiment discloses an explosion-proof oil tank, whose structure mainly includes an inner tank 2 and an outer tank 1, and the inner tank 2 is installed inside the outer tank 1. The difference is that the inner tank 2 and the outer tank 1 in this embodiment do not contact each other, and the inner tank 2 can be centrally located inside the outer tank 1. The outside of the inner tank 2 is spirally wound with a non-metallic gas pipe 3 along its axis. The inlet end of the gas pipe 3 is connected to a compressed gas source so that compressed gas can be injected into the pipeline. At the same time, a piston is slidably fitted inside the gas pipe 3. Under the impact of compressed gas, the piston can move along the path direction of the gas pipe 3, and a magnet is embedded in the piston, and a slider 4 is slidably fitted on the outside of the gas pipe 3. A sticky magnetic block that attracts the magnet is provided inside the slider 4. The sticky magnetic block and the magnet attract each other to form an integrated structure. When the magnet moves in the gas pipe 3, it spirally moves with the sticky magnetic block. At the same time, the slider 4 is made of a material that can be soaked in fuel. For example, the gas pipe 3 is a rigid plastic pipe with a smooth surface, the piston is made of an elastic plastic material, and the slider 4 is made of a sponge that can absorb leaked fuel. When in use, under the action of a compressed air source, when the slider 4, along with the magnetic block, uses the spiral gas pipe 3 as a guide rail to make a spiral motion on the outside of the inner tank 2, the slider 4 always maintains reliable contact with the surface of the inner tank 2, so that when encountering a leak, it can directly wipe and absorb the fuel. At the outlet end of the gas pipe 3 that passes through the outer tank 1, there is a device installed on the tank body of the outer tank 1, such as a combustible gas detector 5, or / and a transparent window, because the slider 4 that absorbs the fuel can no longer move when it moves to the inner surface of the outer tank 1 and stays on the outer tank 1. A combustible gas detector 5 is provided on the inner wall of the tank 1, which can clearly detect whether the slider 4 contains fuel, and the transparent window provided can also allow the operator to directly judge whether there is oil leakage. It not only detects the leakage of the tank body in time, but also takes away the fuel in time to avoid the accumulation of fuel. After the volatilized oil and gas, the concentration increases, leading to accidents such as explosions; through a compressed air source or an external filling / suction device, the piston in the gas pipe 3 can be frequently pumped and the slider can be frequently moved back and forth to achieve continuous and reliable fuel leakage detection.

[0027] In order to prevent the tank from vibrating during transportation and other special occasions, the internal fuel will surge violently and cause accidents, the upper and lower opposite side walls of the inner tank 2 are as follows: Figure 3 It is recommended to provide a plurality of water stop plates 13 arranged at axial intervals, and the water stop plates 13 on the upper and lower sides are staggered with each other, so that the kinetic energy of the fuel surge in the tank body is divided and cut off, and a safe state is maintained as much as possible.

[0028] In the above structure, for safety reasons, it is best to fix the magnetic block on the side of the slider 4 away from the inner tank 2 and tie it to the slider 4 through an insulating rope. Figure 1 , the bottom of the inner tank 2 is supported and installed above the bottom of the outer tank 1 through a number of supports, and the top of the support has an arc-shaped bearing bar 6, and the inner tank 2 is slidably mounted on the bearing bar 6, that is, the inner tank 2 at this time is actually not fixed on the bearing bar 6, and one end of the inner tank 2 is inserted into a first slide 7, one end of the first slide 7 is fixed on the inner end face of the outer tank 1, and the other end is open for the axial sliding insertion of the end of the outer tank 1, and is connected to the inner bottom face of the first slide 7 through a first pressure-bearing spring 8, so as to realize axial movable vibration reduction. Of course, this structure is only applicable to the case where there are no other connecting parts between the inner and outer tanks. If a liquid level gauge is provided, or if pipes are connected to the inner and outer tanks at the same time, it must not be used. Accordingly, in this embodiment, if Figure 1 and Figure 4 A wedge block is fixed to the other end of the inner tank 2. The right end of the wedge block is tilted. The wedge block is inserted into a second slide 9 fixed on the other inner end surface of the outer tank 1. The wedge block cooperates with the inclined surface of a wedge block 11 inserted into the second slide 9. A friction block is tightly attached to the vertical surface of the wedge block 11 opposite to the inclined surface. The friction block is slidably fitted in the second slide 9 and contacts the second pressure spring 10 in the second slide 9. When the wedge block 11 is inserted into the second slide 9 and then continues to move downward, it will axially push the inner tank 2 to move, firmly installing the inner tank 2 in the outer tank 1, playing the role of flexibly adjusting the installation reliability and adjusting the buffering and vibration reduction capacity. In order to fix the inclined wedge block 11, as Figure 4 An L-shaped positioning rod 27 is fixed to the top of the wedge block 11, and the positioning rod 27 is in contact with the side of the sliding pin 26 elastically and telescopically mounted on the end surface of the inner tank 2. Specifically, a plate 28 is fixed to the end surface of the inner tank 2, and a blind hole is horizontally opened on the plate 28. A sliding pin 26 extending out of the plate 28 and toward the positioning rod 27 is connected in the blind hole through a spring. The end of the sliding pin 26 is hemispherical, and a plurality of sliding pins 26 are evenly spaced from top to bottom. The gap between adjacent two sliding pins 26 is used for the horizontal section of the positioning rod 27 to ensure that the wedge block 11 maintains a stable position after being inserted and positioned.

[0029] As a recommended design structure, in this embodiment, Figure 1 and Figure 5A sleeve 14 is also vertically provided on the inner tank 2. The sleeve 14 passes through the inner tank 2 and the outer tank 1 and is fixed thereto. The sleeve 14 passes through the tank wall of the outer tank 1 and extends out of the outside of the oil tank. A core shaft 15 is rotatably installed in the sleeve 14. The top of the core shaft 15 extends out of the outer tank 1 and is equipped with a worm gear 17. The bottom end of the core shaft 15 extends into the inner tank 2, and a threaded pressure ring 18 is fitted on a section of thread near the bottom end. Specifically, the upper shaft section of the core shaft 15 is dynamically sealed and rotatably fitted with the sleeve 14, and the lower shaft section is provided with corresponding threads to be threadedly connected with the threaded pressure ring 18. At the same time, there is also a vent hole 16 inside the core shaft 15. One end of this vent hole 16 extends vertically along the core shaft 15 and horizontally penetrates the core shaft 15 and the side wall of the sleeve 14 to communicate with the external atmosphere, while the other end of the vent hole 16 horizontally penetrates the bottom end of the core shaft 15 in the inner tank 2 and can communicate with the interior of the inner tank 2. When the core shaft 15 rotates in situ around its own axis, the threaded pressure ring 18 can move upward and press on the inner surface of the inner tank 2 in a sealing manner. At this time, the other end of the vent hole 16 (i.e., the port located in the inner tank 2) is located in a cover 19 covering the bottom end of the core shaft 15, thereby isolating and sealing the port of the vent hole 16 from the inner tank 2. During the specific production, the open end of the cover 19 is integrally fixed to the threaded pressure ring 18, or can be integrally formed. The threaded pressure ring 18 in this embodiment can also be guided by a guide rod 20 to realize the linear feed motion of the screw mechanism with the threaded section of the core shaft.

[0030] At the same time, in this embodiment, continue to refer to Figure 1 and Figure 5 A pressure tube 21 inserted into the interior is also fixed on the inner tank 2, and a sliding plug 22 is provided in the pressure tube 21. The sliding plug 22 is actually a piston that slides axially in the pressure tube 21. The top of the sliding plug 22 is connected to the rack 24 through a transmission rod 23. The rack 24 drives a worm through a gear 25. The worm is connected to the worm gear 17. When the sliding plug 22 moves up, it drives the worm gear 17 to rotate and the core shaft 15 to rotate, so that the threaded pressure ring 18 moves down, thereby gradually exposing the other end of the vent hole 16, so that the vent hole 16 is connected to the internal environment of the inner tank 2. When the pressure in the inner tank 2 increases, it will push the sliding plug 22 to move up, causing the rack 24 and gear 25 to rotate, and the core shaft 15 to rotate, and then the threaded pressure ring 18 moves down, and the exposed port of the vent hole 16 becomes larger and larger, thereby realizing the effect of automatic pressure relief and exhaust.

[0031] It should be noted again that, in the present invention, the terms "include", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Therefore, a person of ordinary skill in the art should be aware that any technical solution that a person familiar with this technical field modifies or replaces this embodiment based on the technical principles disclosed in the present invention without departing from the technical purpose of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flameproof oil tank, comprising an inner tank (2) and an outer tank (1), wherein the inner tank (2) is installed inside the outer tank (1), characterized in that: The inner tank (2) and the outer tank (1) do not contact each other. A non-metallic gas pipe (3) is spirally wound around the outer side of the inner tank (2) along its axis. The inlet end of the gas pipe (3) is connected to a compressed gas source. A piston is slidably fitted inside the gas pipe (3). A magnet is embedded inside the piston. A slider (4) is slidably fitted outside the gas pipe (3). A sticky magnetic block that attracts the magnet is provided inside the slider (4), so that when the magnet moves in the gas pipe (3), it moves spirally with the sticky magnetic block. The slider (4) is made of a material that can be soaked in fuel oil. When the slider (4) moves spirally along with the magnetic block outside the inner tank (2), it always maintains reliable contact with the surface of the inner tank (2). A combustible gas detector (5) and / or a transparent window installed on the tank body of the outer tank (1) are provided at the outlet end of the gas pipe (3) passing through the outer tank (1). The bottom of the inner tank (2) is supported and installed above the bottom of the outer tank (1) through a plurality of supports; The top of the support is provided with an arc-shaped bearing bar (6), and the inner tank (2) is mounted on the bearing bar (6) in a sliding manner; one end of the inner tank (2) is inserted into a first slide seat (7), one end of the first slide seat (7) is fixed on the inner end surface of the outer tank (1), and the other end is open for the end of the outer tank (1) to be axially slidably inserted, and is in contact with the inner bottom surface of the first slide seat (7) through a first pressure spring (8); A wedge block is fixedly connected to the other end of the inner tank (2), and the wedge block is inserted into a second slide seat (9) fixed on the other inner end surface of the outer tank (1) opposite to the wedge block. The wedge block cooperates with the inclined surface of a wedge block (11) inserted into the second slide seat (9). A friction block is tightly attached to the vertical surface of the wedge block (11) opposite to the inclined surface. The friction block is located in the second slide seat (9) in a sliding manner and contacts with the second pressure spring (10) in the second slide seat (9).

2. The explosion-proof oil tank according to claim 1, characterized in that: The upper and lower opposite side walls in the inner tank (2) are respectively provided with water stop plates (13) arranged at intervals in the axial direction, and the water stop plates (13) on the upper and lower sides are staggered with each other.

3. The explosion-proof oil tank according to claim 1, characterized in that: The air delivery pipe (3) is a rigid plastic pipe with a smooth surface, the piston is made of elastic plastic material, and the slider (4) is made of sponge.

4. The explosion-proof oil tank according to claim 3, characterized in that: The magnetic sticky block is fixed to the side of the slider (4) facing away from the inner tank (2), and is tied to the slider (4) by an insulating rope.

5. The explosion-proof oil tank according to claim 1, characterized in that: An L-shaped positioning rod (27) is fixed to the top end of the wedge block (11), and the positioning rod (27) contacts and engages with the side surface of a sliding pin (26) elastically and telescopically mounted on the end surface of the inner tank (2).

6. The explosion-proof oil tank according to claim 5, characterized in that: A plate (28) is fixed to the end surface of the inner tank (2), and a blind hole is horizontally opened on the plate (28). The blind hole is connected to the sliding pin (26) extending out of the plate (28) and toward the positioning rod (27) through a spring. A plurality of sliding pins (26) are evenly spaced from top to bottom, and the gap between adjacent two sliding pins (26) is used for the horizontal section of the positioning rod (27) to be inserted.

7. The explosion-proof oil tank according to claim 1, characterized in that: The inner tank (2) is also vertically provided with a sleeve (14), which penetrates the tank wall of the outer tank (1) and extends out of the outside of the oil tank. A core shaft (15) is rotatably installed in the sleeve (14), the top end of the core shaft (15) extends out of the outer tank (1) and is installed with a worm gear (17), and the bottom end thereof extends into the inner tank (2), and a threaded section near the bottom end is matched with a threaded pressing ring (18); The core shaft (15) has an air vent (16) inside, one end of the air vent (16) extends vertically upward along the core shaft (15) and horizontally penetrates the core shaft (15) and the side wall of the sleeve (14) to communicate with the outside, and the other end of the air vent (16) horizontally penetrates the bottom end of the core shaft (15) in the inner tank (2). When the core shaft (15) rotates in situ around its own axis, the threaded pressure ring (18) can move upward and press on the inner surface of the inner tank (2) in a sealing manner. At this time, the other end of the air vent (16) is located in a cover (19) covering the bottom end of the core shaft (15), and the open end of the cover (19) is fixedly connected to the threaded pressure ring (18); A pressure pipe (21) inserted into the inner tank (2) is fixed to the inner tank (2). A sliding plug (22) is provided in the pressure pipe (21). The top of the sliding plug (22) is connected to a rack (24) via a transmission rod (23). The rack (24) transmits a worm through a gear (25). The worm is connected to the worm wheel (17). When the sliding plug (22) moves upward, it drives the worm wheel (17) to rotate and the core shaft (15) to rotate, so that the threaded pressure ring (18) moves downward and gradually exposes the other end of the vent hole (16).

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