Emergency drainage device for external floating roof storage tank

Abstract

The utility model belongs to the technical field of external floating roof storage tanks, and discloses an emergency drainage device for an external floating roof storage tank, which comprises a drainage component for emergency overflow drainage and water seal to prevent oil and gas leakage, and a water pumping component arranged on the front side of the drainage component and used for pneumatic multi-port pumping auxiliary drainage, a control assembly used for controlling water pumping through the accumulated water depth is installed in front of the water pumping assembly. The water pumping assembly comprises a water pumping pipe, a water collecting pipe is installed on the top of the water pumping pipe, and a plurality of water inlet pipes are evenly arranged on the water collecting pipe. According to the emergency drainage device for the external floating roof storage tank, the emergency drainage capacity is greatly improved and the drainage speed is increased through the arrangement of pneumatic extraction and auxiliary drainage; water pumping is controlled by floating along with the water depth, water is automatically pumped to assist in water drainage when accumulated water is deep, and automatic control is achieved; and through the arrangement of multi-port pumping, the water pumping speed is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of external floating roof storage tanks, in particular to an emergency drainage device for external floating roof storage tanks. Background Art

[0002] External floating roof tanks are usually used to store volatile petroleum products such as crude oil, gasoline or kerosene in open cylindrical steel tanks; the external floating roof of the tank rises or falls with the storage level, and there is no space for evaporation compared to fixed-roof tanks without floating roofs; in most cases, an emergency drainage system is provided on the floating roof to ensure that accumulated water can be discharged smoothly on rainy and snowy days to avoid sinking accidents; the emergency drainage device is a safety device on the floating roof of the external floating roof tank. Its function is to prevent the floating roof from tilting or sinking due to excessive accumulated water by setting an emergency drain port when heavy rain occurs and the central drain pipe of the floating roof is too late to drain the accumulated water on the floating roof. By setting an emergency drain port, the accumulated water above a certain height is directly discharged into the tank through the emergency drain port; although this practice causes rainwater to mix with the stored oil, it avoids the risk of the floating plate sinking or becoming unstable.

[0003] In contrast, the Chinese patent with the authorization announcement number CN215157565U discloses an emergency drainage device for a floating roof oil tank, including a water seal groove, a water diffuser, a water collecting filter, a fixed outer cylinder and a removable inner cylinder; one end of the fixed outer cylinder is connected to the water collecting filter, and the other end of the fixed outer cylinder is connected to the top surface of the water seal groove; the removable inner cylinder is arranged on the inner side of the fixed outer cylinder; a group of water diffusers are symmetrically fixedly connected to the two ends of the top surface of the water seal groove; a circular through hole is opened at the center position of the top surface of the water seal groove, and the outer side wall of the bottom end of the fixed outer cylinder is welded at the circular through hole; the fixed outer cylinder is sleeved on the outside of the removable inner cylinder, and the outer wall of the removable inner cylinder is in contact and connected with the inner wall of the fixed outer cylinder; the bottom end of the removable inner cylinder passes through the circular through hole on the top surface of the water seal groove and extends into the interior of the water seal groove; the tops of the fixed outer cylinder and the removable inner cylinder are both provided with an annular mounting plate extending outward; a group of threaded mounting holes are symmetrically opened on the annular mounting plate; the water seal groove is filled with water.

[0004] The above patent uses a natural overflow method to drain the accumulated water. When the rainfall is too large, the accumulated water on the floating plate cannot be quickly drained. Therefore, a new device needs to be designed. Utility Model Content

[0005] The utility model aims to provide an emergency drainage device for an external floating roof storage tank to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An emergency drainage device for an external floating roof storage tank, comprising a drainage assembly for emergency overflow drainage and water sealing to prevent oil and gas leakage, and also comprising a pumping assembly for pneumatic multi-port extraction auxiliary drainage arranged on the front side of the drainage assembly, and a control assembly for controlling the pumping according to the depth of accumulated water installed in front of the pumping assembly;

[0008] The pumping assembly includes a pumping pipe, a water collecting pipe is installed on the top of the pumping pipe, a plurality of water inlet pipes are evenly arranged on the water collecting pipe, a pneumatic diaphragm pump is installed on the pumping pipe, an air inlet pipe is arranged in front of the pneumatic diaphragm pump, a water outlet pipe is installed at the bottom of the pumping pipe, and a one-way valve is arranged at the bottom of the water outlet pipe.

[0009] Furthermore: the drainage component includes a drainage pipe, a water collecting box is arranged on the drainage pipe, a rain roof is arranged on the top of the water collecting box, four filter screens are installed on the circumference of the water collecting box, a water seal box is arranged at the bottom of the drainage pipe, and a plurality of water dispersion pipes are evenly arranged on the top of the water seal box.

[0010] Furthermore: the control component includes a gas cylinder, a gas pipe is arranged at the rear side of the gas cylinder, a control valve is arranged at the top of the gas pipe, a valve stem is arranged at the front side of the control valve, and a float is installed at one end of the valve stem away from the control valve.

[0011] Furthermore: the water collecting pipe is ring-shaped, six water inlet pipes are provided, and the water inlet pipes are welded to the water collecting pipe.

[0012] Furthermore: the bottom of the drainage pipe extends into the water seal box, the filter screen is made of 204 stainless steel, and six water dispersion pipes are provided.

[0013] Furthermore: the float is made of 204 stainless steel, and the height of the float is flush with the top height of the water collecting tank.

[0014] Compared with the prior art, the beneficial effects are:

[0015] 1. Through the setting of pneumatic extraction auxiliary drainage, the emergency drainage capacity is greatly improved and the drainage speed is increased;

[0016] 2. By following the water depth to control the pumping, it can automatically pump water to assist drainage when the water is deep, thus achieving automatic control;

[0017] 3. The pumping speed is improved by setting up multiple extraction ports. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an emergency drainage device for an external floating roof storage tank described in the utility model;

[0019] Figure 2It is an axonometric diagram of a drainage component of an emergency drainage device for an external floating roof storage tank described in the utility model;

[0020] Figure 3 It is an axonometric diagram of a pumping assembly of an emergency drainage device for an external floating roof storage tank described in the utility model;

[0021] Figure 4 It is an axonometric diagram of a control component of an emergency drainage device for an external floating roof storage tank described in the utility model.

[0022] In the accompanying drawings: 101, drainage pipe; 102, water collecting box; 103, rain roof; 104, filter; 105, water seal box; 106, water dispersion pipe; 201, suction pipe; 202, water collecting pipe; 203, water inlet pipe; 204, pneumatic diaphragm pump; 205, air inlet pipe; 206, water outlet pipe; 207, one-way valve; 301, gas cylinder; 302, gas pipeline; 303, control valve; 304, valve stem; 305, float. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 4 An emergency drainage device for an external floating roof storage tank includes a drainage component for emergency overflow drainage and water seal to prevent oil and gas leakage, and also includes a pumping component arranged on the front side of the drainage component for pneumatic multi-port extraction auxiliary drainage, and a control component for controlling the pumping according to the depth of water accumulation is installed in front of the pumping component.

[0025] In this embodiment, the drainage assembly includes a drainage pipe 101, a water collecting box 102 is arranged on the drainage pipe 101, a rain roof 103 is arranged on the top of the water collecting box 102, four filter screens 104 are installed on the circumference of the water collecting box 102, a water seal box 105 is arranged at the bottom of the drainage pipe 101, six diffuser pipes 106 are evenly arranged on the top of the water seal box 105, the water seal box 105 is filled with water, the bottom of the drainage pipe 101 extends into the water in the water seal box 105, and the filter screen 104 is made of 204 stainless steel Under normal conditions, the rain roof 103 prevents rainwater and debris from entering the water collecting tank 102, and the water seal box 105 filled with water acts as a water seal to prevent oil and gas from overflowing through the drain pipe 101. When the water accumulated on the floating plate exceeds the height of the filter screen 104 around the water collecting tank 102 and needs emergency drainage, the collected water is filtered through the filter screen 104 and enters the water collecting tank 102, and flows into the water seal box 105 through the drain pipe 101, and finally discharged through the diffuser pipe 106 above the water seal box 105 for emergency drainage;

[0026] In this embodiment: the pumping assembly includes a pumping pipe 201, a water collecting pipe 202 is installed on the top of the pumping pipe 201, six water inlet pipes 203 are evenly arranged on the water collecting pipe 202, a pneumatic diaphragm pump 204 is installed on the pumping pipe 201, an air inlet pipe 205 is arranged in front of the pneumatic diaphragm pump 204, a water outlet pipe 206 is installed at the bottom of the pumping pipe 201, a one-way valve 207 is arranged at the bottom of the water outlet pipe 206, the water collecting pipe 202 is annular in shape, the water inlet pipe 203 is welded to the water collecting pipe 202, the gas is increased by the air inlet pipe 205 and transported into the pneumatic diaphragm pump 204, so that the pneumatic diaphragm pump 204 works, and the accumulated water is sucked into the pumping pipe 201 through the water inlet pipe 203 and the water collecting pipe 202, and discharged through the water outlet pipe 206 and the one-way valve 207 at the bottom thereof, which greatly improves the emergency drainage capacity, and the one-way valve 207 is used to prevent oil and gas from overflowing through the pumping pipe 201;

[0027] In this embodiment: the control component includes a gas cylinder 301, a gas pipe 302 is arranged at the rear side of the gas cylinder 301, a control valve 303 is arranged on the top of the gas pipe 302, a valve stem 304 is arranged on the front side of the control valve 303, and a float 305 is installed at the end of the valve stem 304 away from the control valve 303. The float 305 is made of 204 stainless steel. The height of the float 305 is flush with the top height of the water collecting tank 102. When the accumulated water is too much and higher than the water collecting tank 102, the float 305 floats up with the water surface, driving the valve stem 304 to rotate and open the control valve 303, so that the gas in the gas cylinder 301 is transported to the pneumatic diaphragm pump 204 through the gas pipe 302.

[0028] Working principle: Under normal conditions, the rain roof 103 prevents rainwater and debris from entering the water collection tank 102, and the water seal box 105 is filled with water to act as a water seal to prevent oil and gas from overflowing through the drain pipe 101. At the same time, the one-way valve 207 prevents oil and gas from overflowing through the pumping pipe 201; when the water accumulated on the floating plate exceeds the height of the filter screen 104 on the circumference of the water collection tank 102 and needs emergency drainage, the collected water is filtered through the filter screen 104 and enters the water collection tank 102, and flows into the water seal box 105 through the drain pipe 101, and finally flows through the diffuser on the water seal box 105. The water pipe 106 is discharged for emergency drainage; when the accumulated water is too much and higher than the water collecting tank 102, the float 305 floats up with the water surface, driving the valve stem 304 to rotate and open the control valve 303, so that the gas in the gas cylinder 301 is transported into the pneumatic diaphragm pump 204 through the gas supply pipe 302 and the air inlet pipe 205, so that the pneumatic diaphragm pump 204 works, and the accumulated water is sucked into the suction pipe 201 through the water inlet pipe 203 and the water collecting pipe 202, and discharged through the water outlet pipe 206 and the one-way valve 207 at its bottom, thereby greatly improving the emergency drainage capacity.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An emergency drainage device for an external floating roof storage tank, comprising a drainage assembly for emergency overflow drainage and water sealing to prevent oil and gas leakage, characterized in that: It also includes a pumping assembly for pneumatic multi-port extraction and auxiliary drainage, which is arranged on the front side of the drainage assembly, and a control assembly for controlling the pumping according to the depth of accumulated water is installed in front of the pumping assembly; The pumping assembly comprises a pumping pipe (201), a water collecting pipe (202) is installed on the top of the pumping pipe (201), a plurality of water inlet pipes (203) are evenly arranged on the water collecting pipe (202), an air-operated diaphragm pump (204) is installed on the pumping pipe (201), an air inlet pipe (205) is arranged in front of the air-operated diaphragm pump (204), a water outlet pipe (206) is installed at the bottom of the pumping pipe (201), and a one-way valve (207) is arranged at the bottom of the water outlet pipe (206).

2. The emergency drainage device for an external floating roof storage tank according to claim 1, characterized in that: The drainage assembly comprises a drainage pipe (101), a water collecting box (102) is arranged on the drainage pipe (101), a rain roof (103) is arranged on the top of the water collecting box (102), four filter screens (104) are installed on the circumference of the water collecting box (102), a water seal box (105) is arranged at the bottom of the drainage pipe (101), and a plurality of water dispersion pipes (106) are evenly arranged on the top of the water seal box (105).

3. The emergency drainage device for an external floating roof tank according to claim 2, characterized in that: The control assembly comprises a gas cylinder (301), a gas supply pipe (302) is arranged at the rear side of the gas cylinder (301), a control valve (303) is arranged at the top of the gas supply pipe (302), a valve stem (304) is arranged at the front side of the control valve (303), and a floating ball (305) is installed at one end of the valve stem (304) away from the control valve (303).

4. The emergency drainage device for an external floating roof storage tank according to claim 1, characterized in that: The water collecting pipe (202) is annular in shape, six water inlet pipes (203) are provided, and the water inlet pipes (203) are connected to the water collecting pipe (202) by welding.

5. The emergency drainage device for an external floating roof tank according to claim 2, characterized in that: The bottom of the drainage pipe (101) extends into the water seal box (105), the filter screen (104) is made of 204 stainless steel, and six water dispersion pipes (106) are provided.

6. The emergency drainage device for an external floating roof tank according to claim 3, characterized in that: The float (305) is made of 204 stainless steel, and the height of the float (305) is flush with the top of the water collecting tank (102).

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