A device for removing water vapor from a well operated by a gas station

Abstract

This utility model discloses a device for removing water vapor from gas station operating wells. The device has a circular hole at a predetermined position on the well wall below the wellhead, facing the direction of the vent pipe of the gas station's storage tank protruding above ground. One end of a ventilation pipe is inserted into this hole, and the other end is extended by welding to the vent pipe of the gas station's storage tank protruding above ground. The main body of the ventilation pipe is designed with a 3% slope along its length, facing inwards from the operating well. The end of the ventilation pipe is led out vertically to the ground via an elbow, aligning with the direction of the vent pipe of the gas station's storage tank protruding above ground. Multiple ventilation pipes corresponding to multiple operating wells are connected by a single steel pipe. The end of the steel pipe is equipped with a rainproof, fire-resistant, and breathable cap. Each ventilation pipe leading to the ground has a flange ball valve and a desiccant box. This utility model adopts a "wellhead side opening + non-powered ventilation pipe" design, achieving non-powered air circulation through pipe connection.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas station operating wells, specifically relating to a device for removing water vapor from gas station operating wells. Background Technology

[0002] The operating well of the oil storage tank at a gas station is a key auxiliary facility for the oil storage tank. Its core function is to centrally house and protect the relevant control components of the oil tank and provide convenience for operations, while also connecting the core functions of the oil storage tank and the refueling machine.

[0003] Currently, to save space and ensure safety, gas stations generally build oil storage tanks under the canopy at the refueling site. However, the underground operating wells in this scenario have long been plagued by excessive moisture, becoming a core pain point for gas station equipment management and sanitation. The excessive moisture in the operating wells is mainly caused by two factors: First, condensation is driven by temperature differences. This includes the liquefaction of water vapor caused by the cooling of the air in the well by low-temperature oil (such as oil just unloaded from a tanker truck), the condensation of air temperature fluctuations caused by diurnal / seasonal temperature differences, and the liquefaction of hot air caused by the temperature of the underground well wall being lower than that of the air inside the well. Second, inadequate waterproofing measures in the oil tank area allow groundwater to seep into the operating wells, further exacerbating the moisture problem.

[0004] The aforementioned moisture issues pose multifaceted hazards to gas station operations: First, they accelerate metal corrosion, as moisture erodes metal components such as valves and pipes, shortening equipment lifespan, damaging sealing structures, and increasing the risk of fuel leaks. Second, they interfere with instrument accuracy; moisture adhering to or seeping into monitoring equipment such as level gauges and pressure gauges can easily lead to data distortion, potentially causing tank overload or fuel supply disruptions. Third, they contaminate the fuel in the tanks; accumulated water seeping into storage tanks through equipment gaps dilutes the fuel, compromises its purity, and may even cause oxidation and deterioration, affecting vehicle engine performance. Fourth, they can cause electrical malfunctions; if electrical components such as level gauge probes are present in the well, moisture may cause short circuits, damaging equipment and creating safety hazards. In summary, the problems of dampness and condensation in operating wells have seriously affected the stability, operational safety, and fuel quality of gas station equipment, urgently requiring targeted technical solutions.

[0005] In the past, the common method for dealing with water vapor in the operating well was for employees to first place a warning fence around the well opening in the refueling lane, open the well cover, and let the water vapor inside the well dissipate by natural airflow. This method is not only cumbersome and laborious and inefficient, but also poses safety hazards. (1) The ventilation inside the gas station operating well is poor, which may contain flammable, explosive, toxic and harmful substances or lack of oxygen, posing a threat to the health and safety of personnel who enter to clean or maintain the equipment. Moreover, if the well opening is not carefully maintained, the refueling vehicles on site may fall into the well, posing a significant safety hazard. (2) It is time-consuming and laborious. It usually needs to be opened once every 2-3 days, and it takes 1-2 hours for the water vapor to evaporate naturally each time. Female employees generally cannot pry open the well cover. (3) It affects the on-site passage rate of refueling vehicles. When the operating well cover is opened on site, the warning fence formed around it affects the timely entry and exit of refueling vehicles from the gas station. Utility Model Content

[0006] The purpose of this utility model is to provide a device for removing water vapor from the operating well of a gas station. It adopts a design of "side opening at the wellhead + non-powered ventilation pipe" and achieves non-powered air circulation through pipe connection.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a device for removing water vapor from the operating well of a gas station. A circular hole is opened at a predetermined position on the well wall below the wellhead, and the position of the circular hole must face the direction of the vent pipe of the gas station's oil storage tank that is exposed above the ground. One end of a ventilation pipe is inserted into the circular hole, and the other end of the ventilation pipe is extended by welding to the position of the vent pipe of the gas station's oil storage tank that is exposed above the ground. The main body of the ventilation pipe is designed with a 3% slope along the length of the pipe, and the slope direction is towards the inside of the operating well. The end of the ventilation pipe is led out of the ground vertically through an elbow and is in the same direction as the ventilation pipe of the oil storage tank of the gas station exposed to the ground. The multiple ventilation pipes corresponding to the multiple operating wells are parallel. The multiple ventilation pipes corresponding to the multiple operating wells are connected by a steel pipe. The end of the steel pipe is equipped with a rainproof and fireproof ventilator, and the rainproof and fireproof ventilator is ensured to be vertically upward. Each of the ventilation pipes leading to the ground is equipped with a flange ball valve, and each flange ball valve is equipped with a desiccant box. The ventilation pipe is located below the end of the operating well and is equipped with a water collection box.

[0008] Preferably, the preset position is 15 centimeters below the wellhead of the operating well.

[0009] Preferably, the nominal diameter of the circular hole is 50 mm, and the nominal diameter of the ventilation pipe is 50 mm.

[0010] Preferably, the water collection box is made of transparent material and marked with water level scale lines.

[0011] Preferably, a sealing structure is provided at the connection between the ventilation pipe and the round hole. The sealing structure is provided as follows: an adjustable metal flange is installed at the opening, and a rubber gasket is provided on the inner side of the flange. It is disassembled and fixed by fine adjustment of the well wall through threads.

[0012] Preferably, metal gaskets and flanges are provided on both sides of the installation position of the flange ball valve and the ventilation pipe; metal gaskets and flanges are provided on the upper surface of the desiccant box.

[0013] Preferably, a removable metal filter is installed inside the desiccant box. The metal filter covers the cross-section of the ventilation duct and is removably snapped into place with the inner wall of the desiccant box.

[0014] Preferably, an observation window is provided on the top end cap of the desiccant box, and a transparent acrylic sheet with a dustproof film is embedded in the observation window. The transparent acrylic sheet is sealed and bonded to the end cap.

[0015] Preferably, a highly reflective warning sign is affixed to the outer wall of the visible section of the ventilation duct leading out of the ground, and the sign is evenly distributed along the circumference of the duct.

[0016] Preferably, the ventilation duct is made of hot-dip galvanized steel.

[0017] The beneficial effects of this utility model are as follows: (1) This utility model adds an "L-shaped bend section + rain cap" to the outdoor section of the ventilation pipe to form a physical anti-backflow structure; at the same time, a detachable metal filter screen is installed inside the desiccant box of the ventilation pipe. The filter screen covers the cross-section of the pipe and is detachably snapped into place with the inner wall of the desiccant box. This solves the problem of rainwater backflow that is prone to occur in traditional ventilation pipes, keeps the operating well dry, reduces water vapor corrosion of equipment, and extends the service life of equipment in the operating well. At the same time, the metal filter screen intercepts debris such as leaves and dust, preventing the ventilation function from "reverse polluting" the internal environment of the operating well. The detachable filter screen can be removed and cleaned separately without disassembling the entire pipe, reducing the difficulty of maintenance operations and further reducing maintenance costs and labor time.

[0018] (2) The ventilation pipe of this utility model achieves directional flow by setting a slope, which avoids condensate dripping directly onto the equipment in the well, thereby reducing the contact between the equipment and condensate from the source. The transparent graduated water collection box allows for intuitive observation of the water level, and staff can determine whether to empty the water without entering the operating well, further reducing the frequency of confined space operations, lowering safety risks, and improving work efficiency.

[0019] (3) The ventilation pipe and operating well of this utility model adopt a "splicing structure", which solves the adaptation problem of "inconsistent well opening size and well wall thickness" of different gas stations. It eliminates the need to customize exclusive pipes for a single gas station, reducing the difficulty and cost of mass production. The splicing structure allows for the individual replacement of partially damaged pipes without replacing the entire ventilation pipe, which is convenient for maintenance and greatly saves on maintenance material costs and replacement time.

[0020] (4) The reflective warning signs in this utility model can remind vehicles and personnel to avoid the pipeline, prevent collision damage, and improve the safety of on-site operations at gas stations. Through the transparent acrylic observation window, staff can directly check the blockage and contamination status of the internal metal filter without disassembling the desiccant box cover, quickly determine the maintenance time, further improve labor efficiency, and reduce the frequency of opening the cover.

[0021] (5) This utility model has a low overall cost. The cost of materials for one-time production is only about 4,000 yuan, and a gas station can save about 5,000 yuan per year in maintenance parts, cleaning supplies and other expenses. Attached Figure Description

[0022] Figure 1 A schematic diagram of the internal layout of the operating well of a device for removing water vapor from the operating well of a gas station, provided by this utility model; Figure 2 A schematic diagram of the ventilation pipeline layout for a gas station with four operating wells provided by this utility model. Detailed Implementation

[0023] The present invention will be further described below. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the protection scope of the present invention.

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "end", "bottom", "side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a direct connection, or a connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Secondly, the term "an embodiment" or "embodiment" as used in this utility model refers to a specific feature, structure, or characteristic that can be included in at least one implementation of this utility model. The phrase "in an embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] This utility model provides a device for removing water vapor from the operating wells of gas stations, such as... Figure 1 As shown, a circular hole is made at a predetermined position on the well wall below the wellhead of the operating well, and the position of the circular hole must face the direction in which the vent pipe of the gas station's oil storage tank protrudes above the ground. One end of the ventilation pipe is inserted into the circular hole, and the other end of the ventilation pipe is extended by welding to the position of the vent pipe of the gas station's oil storage tank protruding above the ground. Figure 1 In the middle, 1 is the structure of the round hole and ventilation pipe, 2 is the water collection box, and 3 is the original equipment and pipelines in the operating well.

[0030] In this utility model, the main body of the ventilation pipe is designed with a 3% inclined slope along the length of the pipe, with the slope direction facing the inside of the operating well; a water collection box 2 is set below the end of the ventilation pipe near the operating well, and the condensate after diversion can naturally flow into the water collection box, and the water collection box is made of transparent material and marked with water level scale lines.

[0031] The ends of the ventilation pipes are led out vertically to the ground through elbows and are in the same direction as the ventilation pipes of the oil storage tanks exposed above the ground at the gas station. The multiple ventilation pipes corresponding to the multiple operating wells are parallel, and each ventilation pipe is equipped with a flange ball valve, and a desiccant box is installed on the flange ball valve.

[0032] Multiple ventilation pipes corresponding to multiple operating wells are connected by a single steel pipe. The end of the steel pipe is equipped with a rainproof and fireproof ventilator, ensuring that the rainproof and fireproof ventilator faces vertically upwards.

[0033] Furthermore, the ventilation ducts are made of hot-dip galvanized steel.

[0034] Furthermore, a sealing structure is provided at the connection between the ventilation duct and the circular hole. The sealing structure is installed as follows: an adjustable metal flange is installed at the opening, and a rubber gasket is installed on the inside of the flange. It can be finely adjusted, disassembled, and fixed to the well wall via threads.

[0035] Furthermore, metal gaskets and flanges are installed on both sides of the flange ball valve and ventilation pipe mounting positions. A metal gasket and flange are also installed on the upper surface of the desiccant box.

[0036] As a preferred embodiment, the aforementioned preset position is 15 centimeters below the wellhead of the operating well wall.

[0037] In a preferred embodiment, the nominal diameter of the circular hole is 50 mm, and the nominal diameter of the ventilation pipe is 50 mm.

[0038] In this invention, the ventilation duct and operating manhole adopt a "splicing structure," with flanges detachably connected via threaded interfaces with rubber gaskets. It also features reducers of different diameters to accommodate pipe connections of varying sizes. An adjustable metal flange is installed at the opening on the manhole side, with a rubber gasket inside. The flange can be finely adjusted and disassembled via threads to the manhole wall. This structure solves the compatibility problem of inconsistent manhole opening sizes and wall thicknesses at different gas stations, eliminating the need for custom-designed pipelines for individual gas stations and reducing the difficulty and cost of mass production. The splicing structure allows for individual replacement of partially damaged pipes without replacing the entire ventilation duct, significantly saving on repair material costs and replacement time.

[0039] In this invention, an "L-shaped bend section + rain cap" is added to the outdoor section of the ventilation duct to form a physical anti-backflow structure, solving the problem of rainwater backflow that is common in traditional ventilation ducts. Simultaneously, a detachable metal filter is installed inside the desiccant box of the ventilation duct. The filter covers the cross-section of the duct and is detachably snapped into place with the inner wall of the desiccant box. The metal filter intercepts leaves, dust, and other debris, preventing the ventilation function from "reversely polluting" the internal environment of the operating well.

[0040] Furthermore, an observation window is provided on the top end cap of the desiccant box where the metal filter is installed. A transparent acrylic panel with a dustproof film is embedded within the window, and the acrylic panel is sealed and bonded to the end cap. Through the transparent acrylic observation window, workers can directly inspect the blockage and contamination status of the internal metal filter without disassembling the desiccant box cover, quickly determine when maintenance is needed, further improve work efficiency, and reduce the frequency of opening the cover.

[0041] Furthermore, highly reflective warning signs are affixed to the visible section of the ventilation duct outside the building. The signs are evenly distributed around the circumference of the duct. These reflective warning signs can remind vehicles and personnel to avoid the duct, prevent collision damage, and improve the safety of on-site operations at the gas station.

[0042] Using the above structure, the specific method for removing water vapor from the operating well in this invention is as follows: open the ball valve of the vent pipe of the operating well. According to Avogadro's law, under the same temperature and pressure, water vapor with a smaller molecular weight has a lower density than air, making it lighter than air, thus allowing for automatic exchange and circulation of water vapor between the operating well and the outside air. Testing showed that after adding the vent pipe, the relative humidity of the operating well remained consistent with the outdoor humidity. This device can achieve automatic, non-powered removal of water vapor from the operating well, making it highly practical.

[0043] To make the technical solution and advantages of the device for removing water vapor from gas station operating wells proposed in this utility model clearer, the following will be used as a reference. Figure 2 Taking a gas station with four operating wells as an example, the manufacturing process of this device is explained as follows: First, a hole with a nominal diameter of 50 mm should be drilled 15 cm below the wellhead of operating well #1. This hole must face the direction from which the vent pipe of the gas station's storage tank protrudes above ground. Next, cut approximately 60 mm of threaded section of a 50 mm nominal diameter hot-dip galvanized steel pipe. Apply sealant evenly to the threaded section. Then, screw a 50 mm nominal diameter circular sealing flange with internal thread into the threaded section of the pipe, leaving a gap of approximately 45 mm. Insert this 45 mm threaded pipe vertically into the drilled hole in the operating well. Screw another 50 mm nominal diameter circular sealing flange with internal thread onto the threaded section of the pipe. Adjust the distance between the two flanges to ensure they clamp tightly against the side of the operating well. Leave approximately 5 mm of threaded pipe inside the operating well for hanging a removable transparent water collection box. Seal the joint with sealant and test for leaks.

[0044] The next step is to weld and extend the 50mm nominal diameter hot-dip galvanized steel pipe, leading it to the vent pipe location above ground near the gas station's storage tank. The entire pipeline needs a 3% slope into the operating well to facilitate the drainage of condensate into the transparent collection box. Repeating the procedure for the vent pipe in operating well #1, lead the vent pipes connected to the openings in operating wells #2, #3, and #4 to the vent pipe location above ground near the gas station's storage tank.

[0045] The next step is to extend four vent pipes vertically 1000 mm above ground level using 45-degree bends, with a center-to-center spacing of 350 mm between each pipe. The four pipes must be arranged in a row and aligned with the direction of the vent pipes extending above ground from the gas station's storage tanks. A 50 mm nominal diameter 8-hole flange will be horizontally welded to the end face of each vent pipe. A 50 mm nominal diameter metal gasket and a 50 mm nominal diameter 8-hole flange ball valve will be placed on the upper end face of the welded 8-hole flange. The pipe flanges will be connected to the 50 mm nominal diameter 8-hole flange ball valve using eight sets of M16*70 bolts. A 50 mm nominal diameter metal gasket and a... For a 50mm nominal diameter desiccant box, connect the upper face of a 50mm nominal diameter 8-hole flange ball valve to the 50mm nominal diameter desiccant box using 8 sets of M16*70 bolts. Butt weld two 50mm nominal diameter 45-degree elbows to form a 90-degree arc bend. Spot weld a 50mm nominal diameter 8-hole flange (not fully welded, to allow for adjustment of angle and direction when connecting pipelines in the next step) to one end face of the 90-degree elbow. Place a 50mm nominal diameter metal gasket and a spot-welded flange assembly on the upper face of the desiccant box for pipeline #1. Connect the desiccant box to the spot-welded flange assembly using 8 sets of M16*70 bolts, ensuring that the upper 90-degree elbow points towards the direction of desiccant box #2.

[0046] The next step is to repeat the welding process described above, except that when bolting the spot-welded flange assembly to the #4 desiccant box, the 90-degree upper elbow should point towards the #3 desiccant box. Place a 50mm nominal diameter metal gasket on the upper surface of the #2 desiccant box, and then place a 50mm nominal diameter 8-hole flange on the gasket. Cut a section of 50mm nominal diameter hot-dip galvanized steel pipe, ensuring that one end is welded to the flange and the other end is welded to a 50mm nominal diameter hot-dip galvanized steel pipe of equal diameter. The total height of the tee after welding the center hole should match the height of the already spot-welded flange and elbow assemblies for #1 and #4. When installing the flange and tee assembly on the #2 desiccant box, ensure that the other two holes of the tee align with the hole diameters of the #1 and #2 elbows, respectively. Perform the same fabrication process on the upper part of the #3 desiccant box.

[0047] The next step is to cut a 2600 mm long, 50 mm nominal diameter hot-dip galvanized steel pipe. A 50 mm nominal diameter 8-hole flange is welded to one end of this pipe, and the other end is welded to the center hole of a 50 mm nominal diameter tee. After placing a 50 mm nominal diameter metal gasket on the flange, the flange is connected to a 50 mm nominal diameter rainproof and fire-retardant vent cap using eight sets of M16*70 bolts. The #1 pipe elbow is then welded to the #2 pipe tee, which is made of the same 50 mm nominal diameter hot-dip galvanized steel pipe. Similarly, the #3 pipe tee is welded to the #4 pipe elbow using the same specification steel pipe. Likewise, the #2 pipe tee is welded to the previously fabricated 2600 mm steel pipe using the same specification tee, ensuring that the rainproof and fire-retardant vent cap on the 2600 mm steel pipe is vertically upwards. Finally, the #3 pipe tee is welded to the same specification tee on the 2600 mm steel pipe. This completes the device for automatically removing water vapor from the gas station's operating well.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for removing water vapor from a well operated by a gas station, characterized by, A circular hole is made at a predetermined position on the well wall below the wellhead of the operating well, and the position of the circular hole must face the direction of the vent pipe of the gas station's oil storage tank that is exposed above the ground; one end of the ventilation pipe is inserted into the circular hole, and the other end of the ventilation pipe is extended by welding to the position of the vent pipe of the gas station's oil storage tank that is exposed above the ground; the main body of the ventilation pipe is designed with a 3% slope along the length of the pipe, and the slope direction is towards the inside of the operating well. The end of the ventilation pipe is led out of the ground vertically through an elbow and is in the same direction as the ventilation pipe of the oil storage tank of the gas station exposed to the ground. The multiple ventilation pipes corresponding to the multiple operating wells are parallel. The multiple ventilation pipes corresponding to the multiple operating wells are connected by a steel pipe. The end of the steel pipe is equipped with a rainproof and fireproof ventilator, and the rainproof and fireproof ventilator is ensured to be vertically upward. Each of the ventilation pipes leading to the ground is equipped with a flange ball valve, and each flange ball valve is equipped with a desiccant box. The ventilation pipe is located below the end of the operating well and is equipped with a water collection box.

2. A device for removing water vapor from a gas station operating well according to claim 1, wherein, The preset position is 15 centimeters below the wellhead of the operating well.

3. A device for removing water vapor from a well operated by a gas station as claimed in claim 1, characterized in that, The nominal diameter of the circular hole is 50 mm, and the nominal diameter of the ventilation pipe is 50 mm.

4. A device for removing water vapor from a gas station operating well according to claim 1, wherein, The water collection box is made of transparent material and is marked with water level scale lines.

5. A device for removing water vapor from a gas station operating well according to claim 1, wherein, A sealing structure is provided at the connection between the ventilation pipe and the round hole. The sealing structure is provided as follows: an adjustable metal flange is installed at the opening, and a rubber gasket is provided on the inner side of the flange. It is disassembled and fixed by fine adjustment of the well wall through threads.

6. A device for removing vapors from a well operated by a gas station as defined in claim 1, wherein, Metal gaskets and flanges are provided on both sides of the installation position of the flange ball valve and the ventilation pipe; metal gaskets and flanges are provided on the upper surface of the desiccant box.

7. A device for removing water vapor from a well operated by a gas station according to claim 1, characterized in that, Inside the desiccant box, a removable metal filter is installed. The metal filter covers the cross-section of the ventilation duct and is removably snapped into place with the inner wall of the desiccant box.

8. A device for removing vapors from a well operated by a gas station as defined in claim 1, wherein, An observation window is provided on the top end cap of the desiccant box. A transparent acrylic sheet with a dustproof film is embedded in the observation window. The transparent acrylic sheet is sealed and bonded to the end cap.

9. A device for removing water vapor from a well operated by a gas station as defined in claim 1, wherein, Highly reflective warning signs are affixed to the outer wall of the visible section of the ventilation duct leading out of the ground, with the signs evenly distributed around the circumference of the duct.

10. A device for removing water vapor from a well operated by a gas station as defined in claim 1, wherein, The ventilation duct is made of hot-dip galvanized steel.

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