Negative pressure prevention device for buoyancy lift construction of gas holder
By designing an anti-negative pressure device, the pressure inside the gas holder is automatically adjusted using the principle of constant water level, which solves the negative pressure problem caused by temperature changes, reduces personnel costs and equipment damage risks, and improves construction safety and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-04-07
AI Technical Summary
During the construction of the 200,000 m3 new gas holder floating system, the negative and positive pressure fluctuations caused by temperature changes require regular manual inspections to adjust the gate valves, which increases personnel costs and poses a risk of equipment damage due to negligence.
Design a negative pressure prevention device, including a tank, connecting pipe, air outlet pipe, air intake pipe and control valve. Utilizing the principle of constant water level, the pressure inside the gas holder is automatically adjusted at night through the air intake and exhaust pipes to prevent the formation of negative pressure.
This reduces the need for manual inspections, lowers the risk of equipment damage due to human negligence, and improves construction safety and efficiency.
Smart Images
Figure CN224094242U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas holder floating construction technology, specifically a gas holder floating construction anti-negative pressure device. Background Technology
[0002] 200,000 m 3 During the floating construction of the new (POC type) gas holder, the floating weight is 1242.28 tons, the piston area is 2509.244㎡, and the floating pressure is 4.857Kpa. During the day, sunlight and rising temperatures increase the internal pressure; at night, lower temperatures decrease the internal pressure, sometimes even creating negative pressure, which can easily damage the holder. On-site technicians observe the data displayed on the U-shaped pressure gauge. During the day, when the temperature rises (especially under direct sunlight), and the actual pressure exceeds the floating pressure of 4.857Kpa, the DN250 gate valve of the oil pump station on the first side plate is opened to release air until the internal pressure drops below the floating pressure of 4.857Kpa. At night, when the temperature drops and negative pressure occurs inside the holder, the DN250 gate valve of the oil pump station on the first side plate is opened to draw in air until the internal and external pressures are equal.
[0003] 200,000 m 3 The new (POC type) gas holder has 47 side plates and the floating construction period is 55 days. During these 55 days, someone needs to patrol regularly every night, which increases personnel costs. Moreover, if the on-duty personnel are lax, the gate valve may not be opened in time to release pressure, resulting in negative pressure inside the gas holder. Therefore, there is an urgent need for a negative pressure prevention device to solve this problem. Utility Model Content
[0004] The purpose of this utility model is to provide a negative pressure prevention device for gas holder floating construction. By setting up a barrel, connecting pipe, gas outlet pipe and gas intake pipe, it solves the problem that the floating construction period is 55 days. During these 55 days, someone needs to patrol regularly every night, which increases personnel costs. Moreover, if the on-duty personnel are lax, the gate valve may not be opened in time to release pressure, thus causing negative pressure to form in the gas holder.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a gas holder floating construction anti-negative pressure device, comprising a barrel body, one end of which is welded to a connecting pipe and an A flange is welded to it, one side of the A flange is fixedly connected to a connecting pipe by an A bolt, one side of the upper surface of the barrel body is welded to an outlet pipe, and the other side of the upper surface of the barrel body is welded to an intake pipe.
[0006] Preferably, one end of the air outlet pipe is welded with a B flange, and one side of the B flange is fixedly connected to an air inlet pipe by a B bolt.
[0007] Preferably, a water inlet pipe is welded to the middle of the upper surface of the barrel, and a C-flange is welded to the top of the water inlet pipe. A control valve is fixedly connected to the upper surface of the C-flange by C-bolts.
[0008] Preferably, an external water pipe is fixedly connected to the top of the control valve by a D-bolt.
[0009] Preferably, a dust cover is welded to one end of the connecting pipe, and a foot is fixedly connected to the lower surface of the barrel.
[0010] This utility model provides a negative pressure prevention device for gas holder floating construction, which has the following beneficial effects:
[0011] In use, the control valve is opened to allow water to be injected into the tank through the inlet pipe via the external water pipe. When the water level reaches the height of the outlet of the connecting pipe, the water will flow out of the device through the connecting pipe and the water level will no longer rise, remaining constant. The air inlet and outlet pipes are always above the water level for air intake. The suction pipe is inserted into the water surface. When negative pressure is generated inside the gas holder, air is drawn into the device through the suction pipe, and the air inside the device is then drawn into the gas holder through the air inlet pipe, thereby eliminating the negative pressure inside the holder. This device can eliminate the negative pressure generated in the gas holder at night, greatly reducing the need for manpower, avoiding equipment damage due to personnel negligence, and improving construction safety. Attached Figure Description
[0012] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a cross-sectional view of the barrel body of this utility model;
[0015] Figure 3 This is a cross-sectional view of the connecting pipe of this utility model.
[0016] The image shows:
[0017] 1. Barrel body; 2. Connecting pipe; 3. A flange; 4. Connecting pipe; 5. Air outlet pipe; 6. Air intake pipe; 7. B flange; 8. Air inlet pipe; 9. Water inlet pipe; 10. C flange; 11. Control valve; 12. External water pipe; 13. Dust cover; 14. Base. Detailed Implementation
[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0020] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment proposes a negative pressure prevention device for gas holder floating construction, including a barrel 1. A connecting pipe 2 is welded to one side of the barrel 1, and an A flange 3 is welded to one end. A connecting pipe 4 is fixedly connected to one side of the A flange 3 by an A bolt. An exhaust pipe 5 is welded to one side of the upper surface of the barrel 1, and an intake pipe 6 is welded to the other side of the upper surface of the barrel 1. When it is necessary to drain the water in the barrel 1, a flexible hose is inserted through the intake pipe 6, and the drainage in the device can be completed through the siphon effect. The intake pipe 6 extends into the interior of the barrel 1. After water is injected, the water level reaches a certain height and flows out through the connecting pipe 4. At this time, the bottom end of the intake pipe 6 is submerged in the water surface. When the gas holder is under negative pressure, air is drawn in from the outside through the intake pipe 6. The design height of the intake pipe 6 is greater than the height of the water column generated by the floating construction pressure.
[0021] One end of the gas outlet pipe 5 is welded with a B flange 7. One side of the B flange 7 is fixedly connected to the gas inlet pipe 8 by a B bolt. One end of the gas inlet pipe 8 is connected to the inside of the gas holder. This equipment is arranged outside the gas holder for easy operation by personnel.
[0022] A water inlet pipe 9 is welded to the middle of the upper surface of the tank body 1. A C flange 10 is welded to the top of the water inlet pipe 9. A control valve 11 is fixedly connected to the upper surface of the C flange 10 by C bolts. An external water pipe 12 is fixedly connected to the top of the control valve 11 by D bolts. By rotating the control valve 11, the water in the external water pipe 12 is transported to the tank body 1 through the water inlet pipe 9, which makes it convenient for personnel to replenish the water in the tank body 1 and avoid the water level from dropping due to evaporation.
[0023] A dust cover 13 is welded to one end of the connecting pipe 4, and a foot 14 is fixedly connected to the lower surface of the barrel 1. The dust cover 13 prevents external impurities from entering the connecting pipe 4 and causing blockage, making it difficult to achieve drainage and resulting in excessively high water levels in the equipment.
[0024] Specifically, the negative pressure prevention device for gas holder floating construction operates as follows: During use, opening the control valve 11 allows water to be injected into the tank 1 through the inlet pipe 9 via the external water pipe 12. When the water level reaches the outlet height of the connecting pipe 4, the water flows out of the device through the connecting pipe 4, and the water level remains constant, no longer rising. The air inlet pipe 8 and air outlet pipe 5 are always above the water level for air intake. The suction pipe 6 is inserted into the water surface. When negative pressure is generated inside the gas holder, air is drawn into the device through the suction pipe 6, and the air inside the device is then drawn into the gas holder through the air inlet pipe 8, thus eliminating the negative pressure inside the holder. This device can eliminate negative pressure generated in the gas holder at night, greatly reducing the need for manpower, avoiding equipment damage due to personnel negligence, and improving construction safety.
[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A negative pressure prevention device for gas holder floating construction, comprising a barrel (1), characterized in that: A flange (3) is welded to one end of a connecting pipe (2) on one side of the barrel (1). A connecting pipe (4) is fixedly connected to one side of the flange (3) by an A bolt. An air outlet pipe (5) is welded to one side of the upper surface of the barrel (1), and an air intake pipe (6) is welded to the other side of the upper surface of the barrel (1).
2. The anti-negative pressure device for gas holder floating construction according to claim 1, characterized in that: One end of the air outlet pipe (5) is welded with a B flange (7), and one side of the B flange (7) is fixedly connected to an air inlet pipe (8) by a B bolt.
3. The anti-negative pressure device for gas holder floating construction according to claim 1, characterized in that: A water inlet pipe (9) is welded to the middle of the upper surface of the barrel (1), and a C flange (10) is welded to the top of the water inlet pipe (9). A control valve (11) is fixedly connected to the upper surface of the C flange (10) by C bolts.
4. The anti-negative pressure device for gas holder floating construction according to claim 3, characterized in that: The top of the control valve (11) is fixedly connected to an external water pipe (12) by a D bolt.
5. The anti-negative pressure device for gas holder floating construction according to claim 1, characterized in that: A dust cover (13) is welded to one end of the connecting pipe (4), and a foot (14) is fixedly connected to the lower surface of the barrel (1).