Safety assembly of oil storage tank

Abstract

The invention relates to the technical field of oil and gas storage and transportation, in particular to an oil storage tank safety assembly which comprises a main valve body, a flow guide body, a rainproof cap, a fire retardant core, an oil seal box and an oil seal pipe. The oil seal device is reasonable and compact in structure, when the oil seal device is used, existing known liquid seal oil such as aviation hydraulic oil is added into the oil seal box, the liquid level of the liquid seal oil is located above the lower end of the oil seal pipe, and then the lower end of the main valve body is fixedly installed on an oil storage tank. The oil seal box is arranged on the inner side of the main valve body, heat preservation is facilitated, the anti-freezing and anti-spraying performance of the oil seal box is improved, the rainproof cap facilitates rain prevention, impurities can be prevented from entering the fire retardant core to affect the performance, and the breathing effect of the safety valve can be achieved; and the phenomena of liquid seal splashing of the hydraulic safety valve and incapability of checking due to freezing of the flame arrester can be solved, safe operation of the storage tank is guaranteed, oil gas loss, atmospheric pollution and atmospheric corrosion of the storage tank are reduced, and potential safety hazards are eradicated. The device has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas storage and transportation, and is an oil storage tank safety component. Background Art

[0002] Hydraulic safety valves and flame arresters are important accessories for protecting the safety of oil tanks in oil storage and transportation systems. They belong to the category of automatic valves. Hydraulic safety valves, flame arresters and mechanical safety valves are used in conjunction. The hydraulic safety valve can control a higher pressure value than the mechanical safety valve. Its opening and closing are in a normally closed state under the action of external forces. The hydraulic safety valve is installed on the top of the oil tank. It is used to replace the mechanical breathing valve to breathe the oil tank when the mechanical breathing valve fails and to adjust the pressure balance in the tank. The mechanical breathing valve is set on the top of the oil tank and can automatically control the opening and closing of the oil and gas passage, thereby protecting the oil tank from overpressure and reducing the evaporation loss of oil products. A flame arrester is safely installed at the bottom of the hydraulic safety valve. In winter, the flame arrester will be frozen and blocked due to condensed water, and the flame arrester cannot be inspected, which is easy to cause equipment accidents.

[0003] At present, it is not scientific to install the flame arrester at the bottom of the hydraulic safety valve. The freezing and blockage of the flame arrester cannot be checked in winter, which can easily cause equipment failure.

[0004] In actual production, when the hydraulic safety valve on the oil storage tank replaces the mechanical breathing valve to make the oil storage tank breathe, the liquid sealing oil in the liquid sealing cylinder is used, which is mostly colorless transformer oil, kerosene, diesel, low-viscosity lubricating oil, ethylene glycol, etc. (liquids with high boiling point, low volatility, and low freezing point are used as liquid seals). In the interaction between the internal pressure and external pressure of the oil storage tank, the liquid level difference of the liquid sealing oil in the liquid sealing cylinder is changed to make the tank breathe. When the internal pressure of the tank increases sharply, it will cause the liquid sealing oil to splash, thereby contaminating the tank. The contaminated tank top is not easy to clean, and it will cause environmental pollution accidents. Summary of the invention

[0005] The present invention provides an oil storage tank safety component, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of the existing hydraulic safety valve, such as liquid seal splashing and flame arrester freezing that cannot be inspected.

[0006] The technical scheme of the present invention is achieved through the following measures: an oil storage tank safety component, comprising a main valve body, a guide body, a rainproof cap, a fire-blocking core, an oil seal box and an oil seal pipe, wherein the main valve body is provided with an oil storage bin which is connected from top to bottom and is larger at the top and smaller at the bottom, a guide body is detachably and fixedly mounted on the upper end of the main valve body, the guide body is a cylindrical structure which is open at the upper end and closed at the lower end, a plurality of communicating holes which are connected inside and outside are evenly distributed along the circumference on the outer side of the upper end of the guide body, a rainproof cap is provided on the outer side cover of the upper end of the guide body, a fire-blocking core is fixedly mounted on the inner side of the upper part of the guide body corresponding to the position below the communicating hole, an oil seal box is fixedly mounted on the inner side of the upper part of the oil storage bin, a mounting hole which is connected from top to bottom is provided in the center of the lower end of the guide body, and an oil seal pipe whose lower end is located on the inner side of the lower part of the oil seal box is fixedly mounted on the lower end of the guide body corresponding to the position of the mounting hole.

[0007] The following are further optimizations and / or improvements to the above technical solutions: The upper end of the oil seal tube can be located on the inner side of the lower part of the guide body after passing through the mounting hole. A support tube is fixedly mounted on the upper end of the oil seal tube. The upper end of the support tube contacts the lower end of the fire-blocking core. A plurality of ventilation holes connected inside and outside are discretely distributed on the outside of the support tube.

[0008] A plurality of oil return holes communicating with the inside and outside may be arranged at intervals along the circumference on the outer side of the upper end of the oil seal tube corresponding to the inner side of the guide body.

[0009] The above-mentioned fire-blocking core can be in a circular shape and a sealing ring is installed between the lower end and the upper end of the support tube. A fixing rod is provided in the fire-blocking core, and the lower end and the upper end of the support tube are fixedly installed together. A fixing hole is provided in the center of the upper end of the rain cap, and a fixing screw is fixedly installed on the upper end of the fixing rod, and the upper end passes through the fixing hole and is screwed with a cap nut.

[0010] A plurality of support blocks may be evenly spaced along the circumference on the inner side of the lower part of the main valve body, each support block is provided with a fixing groove opening upward, and a mounting plate fixed to the outer side of the lower end of the oil seal box is fixedly installed in each fixing groove.

[0011] The lower end of the guide body may be provided with a connecting screw hole, in which an oil dipstick with its lower end located between the outer side of the oil seal tube and the inner side of the oil seal is threaded, and the lower end of the oil dipstick is located below the lower end of the oil seal tube.

[0012] A mounting flange may be fixedly mounted on the outer side of the lower end of the main valve body.

[0013] The structure of the present invention is reasonable and compact. When in use, the existing well-known liquid seal oil, such as aviation hydraulic oil, is added to the oil seal box. The liquid level of the liquid seal oil is located above the lower end of the oil seal tube, and then the lower end of the main valve body is fixedly installed on the oil storage tank. In the present invention, the oil seal box is arranged inside the main valve body, which is beneficial to heat preservation and improves the antifreeze and anti-spray performance of the oil seal box. The rain cap is not only beneficial to rain protection, but also can prevent debris from entering the fire arrester core to affect the performance. The present invention can not only realize the breathing effect of the safety valve, but also solve the problem of hydraulic safety valve liquid seal splashing and flame arrester freezing and being unable to be checked, ensuring the safe operation of the storage tank, reducing oil and gas loss, reducing atmospheric pollution, reducing atmospheric corrosion of the storage tank, and eliminating safety hazards. It has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of the first embodiment.

[0015] Attached Figure 2 It is a schematic diagram of the top cross-sectional structure of the first embodiment.

[0016] Attached Figure 3 It is a schematic diagram of the three-dimensional structure of the first embodiment.

[0017] The codes in the accompanying drawings are: 1 is the main valve body, 2 is the guide body, 3 is the rain cap, 4 is the fire-blocking core, 5 is the oil seal box, 6 is the oil seal pipe, 7 is the oil storage bin, 8 is the connecting hole, 9 is the supporting cylinder, 10 is the vent hole, 11 is the oil return hole, 12 is the sealing ring, 13 is the fixing rod, 14 is the fixing screw, 15 is the cap nut, 16 is the supporting block, 17 is the mounting plate, 18 is the oil dipstick, and 19 is the mounting flange. DETAILED DESCRIPTION

[0018] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0019] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0020] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figure 1 , 2As shown in Figures 3 and 4, the oil storage tank safety component comprises a main valve body 1, a guide body 2, a rainproof cap 3, a fire-blocking core 4, an oil seal box 5 and an oil seal tube 6. An oil storage bin 7 which is connected from top to bottom and is larger at the top and smaller at the bottom is provided in the main valve body 1. The guide body 2 is detachably fixedly installed on the upper end of the main valve body 1. The guide body 2 is a cylindrical structure which is open at the upper end and closed at the lower end. A plurality of communicating holes 8 which are connected inside and outside are evenly distributed along the circumference on the outer side of the upper end of the guide body 2. A rainproof cap 3 is provided on the outer side cover of the upper end of the guide body 2. A fire-blocking core 4 is fixedly installed on the inner side of the upper part of the guide body 2 corresponding to the position below the communicating hole 8. An oil seal box 5 is fixedly installed on the inner side of the upper part of the oil storage bin 7. A mounting hole which is connected from top to bottom is provided in the center of the lower end of the guide body 2. An oil seal tube 6 whose lower end is located on the inner side of the lower part of the oil seal box 5 is fixedly installed on the lower end of the guide body 2 corresponding to the position of the mounting hole.

[0021] According to the requirements, the fire-blocking core 4 is an existing well-known technology, such as a metal mesh filter element and a corrugated filter element, the rain cap 3 is umbrella-shaped, the upper end of the connecting hole 8 can extend to the upper end surface of the guide body 2, and the lower end of the guide body 2 and the upper end of the main valve body 1 are detachably fixed together through flanges, bolts and nuts. When in use, add existing well-known liquid seal oil, such as aviation hydraulic oil, into the oil seal box 5, the liquid level of the liquid seal oil is located above the lower end of the oil seal tube 6, and then the lower end of the main valve body 1 is fixedly installed on the oil storage tank. In the present invention, the oil seal box 5 is arranged on the inner side of the main valve body 1, which is conducive to heat preservation and improves the antifreeze and anti-spray performance of the oil seal box 5. The rain cap 3 is not only conducive to rain protection, but also can prevent debris from entering the fire-blocking core 4 to affect the performance. The present invention can not only realize the breathing effect of the safety valve, but also solve the phenomenon that the hydraulic safety valve liquid seal splashes and the flame arrester freezes and cannot be checked, ensure the safe operation of the storage tank, reduce oil and gas loss, reduce atmospheric pollution, reduce atmospheric corrosion of the storage tank, and eliminate safety hazards. The invention has a reasonable and compact structure and is safe, labor-saving, simple and efficient.

[0022] The above oil storage tank safety components can be further optimized and / or improved according to actual needs: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, the upper end of the oil seal tube 6 passes through the mounting hole and is located inside the lower part of the flow guide body 2. A support tube 9 is fixedly mounted on the upper end of the oil seal tube 6. The upper end of the support tube 9 is in contact with the lower end of the fire-blocking core 4. A plurality of vent holes 10 communicating with each other are discretely distributed on the outer side of the support tube 9. During use, the support tube 9 can reduce the external spraying of the liquid seal oil when the pressure in the storage tank fluctuates, and avoid the liquid seal oil splashing and affecting the fire-blocking effect of the fire-blocking core 4.

[0023] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1As shown, a plurality of oil return holes 11 connected inside and outside are arranged at intervals along the circumference on the outer side of the upper end of the oil seal tube 6 corresponding to the inner side of the guide body 2. The oil return hole 11 is semicircular as required. During use, when the pressure in the storage tank fluctuates, the liquid seal oil in the oil seal box 5 flows into the guide body 2 through the oil seal tube 6 and the oil return hole 11, and then after the pressure in the storage tank stabilizes, it can flow back to the oil seal box 5 through the oil return hole 11 again, so as to avoid the loss of the liquid seal oil in the oil seal box 5 and the loss of the oil sealing effect. At the same time, when the liquid seal oil is added to the guide body 2, the liquid seal oil can also flow into the oil seal box 5 through the oil return hole 11, which is convenient to operate.

[0024] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown in , 3, the fire-blocking core 4 is in a circular shape and a sealing ring 12 is installed between the lower end and the upper end of the support tube 9. A fixing rod 13 is provided in the fire-blocking core 4, the lower end of which is fixedly installed with the upper end of the support tube 9. A fixing hole is provided in the center of the upper end of the rain cap 3, which passes through the upper end. A fixing screw 14 is fixedly installed on the upper end of the fixing rod 13, and the upper end passes through the fixing hole and is screwed with a cap nut 15. According to the requirements, the sealing ring 12 is sleeved on the outside of the fixing rod 13, and the outer diameter of the fixing screw 14 is smaller than the outer diameter of the fixing rod 13. The upper end of the fixing rod 13 can support the rain cap 3, and the cap nut 15 and the fixing rod 13 can fix the rain cap 3. At the same time, the cap nut 15 can also prevent rainwater or impurities from entering the fire-blocking core 4 to affect the fire-blocking function of the fire-blocking core 4.

[0025] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, a plurality of support blocks 16 are evenly spaced along the circumference of the inner side of the lower part of the main valve body 1, and each support block 16 is provided with a fixing groove opening upward, and a mounting plate 17 fixed to the outer side of the lower end of the oil seal box 5 is fixedly installed in each fixing groove. According to the requirements, each mounting plate 17 and the support block 16 at the corresponding position are fixedly installed together by connecting bolts, and such an arrangement can improve the stability of the oil seal box 5.

[0026] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, the lower end of the guide body 2 is provided with a connecting screw hole, and an oil dipstick 18 whose lower end is located between the outer side of the oil seal tube 6 and the inner side of the oil seal is threadedly connected in the connecting screw hole, and the lower end of the oil dipstick 18 is located below the lower end of the oil seal tube 6. During use, through such a setting, the position of the oil level in the oil seal box 5 can be checked, and the oil level in the oil seal box 5 can be ensured to be located at the lower end of the oil seal tube 6, so as to prevent flames from entering the tank through the oil seal tube 6 and the oil seal box 5 and causing accidents, and it is convenient to check and repair during use.

[0027] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 1 , 3 As shown, a mounting flange 19 is fixedly mounted on the outer side of the lower end of the main valve body 1. In use, such an arrangement facilitates installation between the main valve body and the tank body.

[0028] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An oil tank safety component, characterized in that It includes a main valve body, a guide body, a rainproof cap, a fire-blocking core, an oil seal box and an oil seal pipe. The main valve body is provided with an oil storage bin which is connected from top to bottom and is larger at the top and smaller at the bottom. The upper end of the main valve body is detachably fixedly provided with a guide body. The guide body is a cylindrical structure with an open upper end and a closed lower end. A number of communicating holes which are connected inside and outside are evenly distributed along the circumference on the outer side of the upper end of the guide body. A rainproof cap is provided on the outer side cover of the upper end of the guide body. A fire-blocking core is fixedly provided on the inner side of the upper part of the guide body corresponding to the position below the communicating hole. An oil seal box is fixedly provided on the inner side of the upper part of the oil storage bin. A mounting hole which is connected from top to bottom is provided in the center of the lower end of the guide body. An oil seal pipe with its lower end located on the inner side of the lower part of the oil seal box is fixedly provided on the lower end of the guide body corresponding to the position of the mounting hole.

2. The oil tank safety assembly according to claim 1, characterized in that The upper end of the oil seal tube is located on the inner side of the lower part of the guide body after passing through the installation hole. A support tube is fixedly installed on the upper end of the oil seal tube. The upper end of the support tube is in contact with the lower end of the fire-blocking core. A plurality of ventilation holes connected inside and outside are discretely distributed on the outside of the support tube.

3. The oil storage tank safety assembly according to claim 2, characterized in that A plurality of oil return holes communicating with the inside and outside are arranged at intervals along the circumference on the outer side of the upper end of the oil seal tube corresponding to the inner side of the guide body.

4. The oil storage tank safety assembly according to claim 2 or 3, characterized in that The fire-blocking core is in a circular shape and a sealing ring is installed between the lower end and the upper end of the support tube. A fixing rod is provided in the fire-blocking core, and the lower end and the upper end of the support tube are fixedly installed together. A fixing hole is provided in the center of the upper end of the rain cap, and a fixing screw is fixedly installed on the upper end of the fixing rod, and the upper end passes through the fixing hole and is screwed with a cap nut.

5. The oil storage tank safety assembly according to claim 1, 2 or 3, characterized in that A plurality of support blocks are evenly spaced along the circumference of the inner side of the lower part of the main valve body, each support block is provided with a fixing groove opening upward, and a mounting plate fixed to the outer side of the lower end of the oil seal box is fixedly installed in each fixing groove.

6. The oil tank safety assembly according to claim 4, characterized in that A plurality of support blocks are evenly spaced along the circumference of the inner side of the lower part of the main valve body, each support block is provided with a fixing groove opening upward, and a mounting plate fixed to the outer side of the lower end of the oil seal box is fixedly installed in each fixing groove.

7. The oil storage tank safety assembly according to claim 1, 2, 3 or 6, characterized in that A connecting screw hole is arranged at the lower end of the guide body, and an oil dipstick whose lower end is located between the outer side of the oil seal tube and the inner side of the oil seal is threadedly connected in the connecting screw hole, and the lower end of the oil dipstick is located below the lower end of the oil seal tube.

8. The oil storage tank safety assembly according to claim 4, characterized in that A connecting screw hole is arranged at the lower end of the guide body, and an oil dipstick whose lower end is located between the outer side of the oil seal tube and the inner side of the oil seal is threadedly connected in the connecting screw hole, and the lower end of the oil dipstick is located below the lower end of the oil seal tube.

9. The oil storage tank safety assembly according to claim 5, characterized in that A connecting screw hole is arranged at the lower end of the guide body, and an oil dipstick whose lower end is located between the outer side of the oil seal tube and the inner side of the oil seal is threadedly connected in the connecting screw hole, and the lower end of the oil dipstick is located below the lower end of the oil seal tube.

10. The oil storage tank safety assembly according to claim 1 or 2 or 3 or 6 or 8 or 9, characterized in that A mounting flange is fixedly mounted on the outer side of the lower end of the main valve body.

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